EP3924174A1 - Method for producing a moulded body that encloses a cavity by welding two partial bodies, and die for welding two partial bodies - Google Patents

Method for producing a moulded body that encloses a cavity by welding two partial bodies, and die for welding two partial bodies

Info

Publication number
EP3924174A1
EP3924174A1 EP20702325.0A EP20702325A EP3924174A1 EP 3924174 A1 EP3924174 A1 EP 3924174A1 EP 20702325 A EP20702325 A EP 20702325A EP 3924174 A1 EP3924174 A1 EP 3924174A1
Authority
EP
European Patent Office
Prior art keywords
channel
tool
welding
course
welding web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20702325.0A
Other languages
German (de)
French (fr)
Inventor
Stefan Mochev
Ulrich Endemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP3924174A1 publication Critical patent/EP3924174A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24249—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a specific polygon not provided for in B29C66/24241 - B29C66/24243
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00141—Protective gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7214—Fibre-reinforced materials characterised by the length of the fibres
    • B29C66/72143—Fibres of discontinuous lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73117—Tg, i.e. glass transition temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73771—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73773—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91933—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined higher than said fusion temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91941—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to Tg, i.e. the glass transition temperature, of the material of one of the parts to be joined
    • B29C66/91943—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to Tg, i.e. the glass transition temperature, of the material of one of the parts to be joined higher than said glass transition temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B29K2105/165—Hollow fillers, e.g. microballoons or expanded particles
    • B29K2105/167—Nanotubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2022/00—Hollow articles

Definitions

  • the present invention relates to a method for producing a molded body which encloses a cavity by welding two part bodies (1a, 1b) and a tool (5) with which the method for producing the molded body can be carried out.
  • the present invention also relates to the shaped body which can be obtained by the process according to the invention.
  • EP 1 415 789 describes a tool that is inserted between two plastic parts to be connected. This tool can heat the surfaces to be welded of the plastic parts to be connected by means of radiant heat and a hot inert gas stream.
  • WO 2017/198483 discloses a method for welding shaped bodies, the end (2a) of a first shaped body (1a) being melted with the aid of a channel (7a) through a means (11a) for supplying a hot gas, and the joining surface ( 2b) of the second molded body (1b) is also melted with the aid of a channel (7b) which comprises a means (11b) for supplying a hot gas, and the heated end (2a) of the first molded body (1a) with the heated Joining surface (2b) of the second molded body (1b) is connected.
  • the method described in WO 2017/198483 enables a uniform melting of the Joining surface (2a) and the joining surface (2b), whereby a uniform weld seam is generally obtained.
  • the welding web (2a) of the first part body (1a) can be heated more evenly, as a result of which better weld seam qualities are obtained.
  • this also applies to the welding web (2b) of the second part-body (1b), which according to a preferred embodiment of the present invention can also be heated more evenly.
  • the better weld seam quality results from the more uniform melting of the weld web (2a) and / or the weld web (2b), which results in a particularly even thickness of the weld seam and a higher symmetry of the weld seam.
  • the method according to the invention can in part be carried out more quickly than the methods described in the prior art and therefore results in shorter cycle times than the methods described in the prior art.
  • the cycle time is understood to mean the period from the beginning of the positioning of the first partial body (1a) and the second partial body (1b) in step c) until the molding, which encloses a cavity, is obtained in step e).
  • step a) the first partial body (1a) is provided.
  • the first part body (1a) comprises a welding web (2a) with a self-contained course.
  • the first part body (1a) comprises an opening which is delimited by the welding web (2a).
  • the welding web (2a) is adjoined by an outer surface (3a) which is essentially closed. The outer surface (3a) delimits the body part (1a) to the outside.
  • the term “essentially closed” means that the outer surface (3a), based on the total area of the outer surface (3a), has less than 10%, preferably less than 5% and particularly preferably less than 2.5% opening areas. In a particularly preferred embodiment, the outer surface (3a) has no openings.
  • a first interior space (20a) of the first partial body (1a) is defined by the area between the surface spanned by the welding web (2a) and the inner surface (4a) of the first partial body (1a).
  • Figure 3a shows an example of the top view of a hemispherical part body (1a) with a welding bar (2a). The welding web (2a) defines the end of the first part-body (1a).
  • the welding web (2a) can be designed in all forms known to the person skilled in the art.
  • the welding web (2a) can be flat, edge-shaped, step-shaped or rib-shaped.
  • the welding web (2a) is rib-shaped, the rib having a right-angled cross section.
  • the width of the welding web (2a) is usually in the range from 0.5 to 16 mm, preferably in the range from 1 to 10 mm and particularly preferably in the range from 2 to 8 mm.
  • Figure (3b) shows an example of a perspective view of a hemispherical part body (1a), in which the end of the part body (1a) forms the welding web (2a).
  • the welding bar (2a) contains a first thermoplastic polymer.
  • thermoplastic polymer means both precisely one first thermoplastic polymer and a mixture of two or more first thermoplastic polymers.
  • thermoplastic polymers known to the person skilled in the art are suitable as the first thermoplastic polymer.
  • the first thermoplastic polymer is preferably selected from the group consisting of amorphous thermoplastic polymers and partially crystalline thermoplastic polymers.
  • the first thermoplastic polymer is therefore selected, for example, from the group consisting of polyamides, polyoxymethylenes, polyphthalamides (PPA), polysulfones (PSU), polyether sulfones (PESU), polyphenyl sulfones (PPSU),
  • the present invention therefore also relates to a method in which the first thermoplastic polymer contained in the welding web (2a) is selected from the group consisting of polyamides, polyoxymethylenes, polyphthalamides (PPA), polysulfones (PSU), polyether sulfones (PESU), and polyphenyl sulfones (PPSU),
  • PPA polyphthalamides
  • PSU polysulfones
  • PESU polyether sulfones
  • PPSU polyphenyl sulfones
  • the first thermoplastic polymer usually has a glass transition temperature (T Gi ).
  • T Gi glass transition temperature of the first thermoplastic polymer in the range from 50 to 350 ° C, preferably in the range from 150 to 270 ° C and particularly preferably in the range from 170 to 240 ° C, determined by means of differential scanning calorimetry (DSC) .
  • DSC differential scanning calorimetry
  • the present invention therefore also relates to a process in which the first thermoplastic polymer has a glass transition temperature (T Gi ) which is in the range from 50 to 350.degree.
  • T Gi glass transition temperature
  • the first thermoplastic polymer is a partially crystalline thermoplastic polymer
  • the first thermoplastic polymer usually also has a melting temperature (T M1 ).
  • T M1 melting temperature of the first thermoplastic polymer is then in the range from 80 to 400 ° C., preferably in the range from 140 to 320 ° C. and particularly preferably in the range from 160 to 300 ° C., determined by means of dynamic differential calorimetry (differential scanning Calorimetry; DSC).
  • the present invention therefore also provides a method in which the first thermoplastic polymer, if the first thermoplastic polymer is a partially crystalline thermoplastic polymer, has a melting temperature (T M1 ) which is in the range from 80 to 400.degree.
  • the welding bar (2a) of the first partial body (1a) can also contain other components.
  • Such further components are known to the person skilled in the art and are selected, for example, from the group consisting of fillers and additives.
  • fillers are suitable as fillers.
  • Such fillers are selected, for example, from the group consisting of glass spheres, glass fibers, carbon fibers, carbon nanotubes and chalk.
  • Suitable additives are also known to the person skilled in the art and are selected, for example, from the group consisting of anti-nucleating agents, stabilizers, end group functionalizers and dyes.
  • the first partial body (1a) preferably contains the first thermoplastic polymer.
  • the first part body (1a) contains the same components as the welding web (2a). If the welding bar (2a) therefore contains further components in addition to the first thermoplastic polymer, it is preferred that the first part-body (1a) also contains the further components in addition to the first thermoplastic polymer.
  • the first part body (1a) can have any shape known to the person skilled in the art.
  • the first partial body (1a) preferably has shapes in which the aforementioned preferred conditions according to the invention are met.
  • the molded body preferably has a bowl-shaped or box-shaped shape, the shape defined by the welding web course (2a) as well as the shape of the outside (3a) and the inside (4a) can have complex shapes, such as are required in automobile construction, for example.
  • a second partial body (1b) is additionally provided in step a), the second partial body (1b) comprising a welding web (2b) with a self-contained course.
  • the statements and preferences made above for the first part body (1a) apply accordingly.
  • step a) additionally comprises the provision of the second part body (1 b), the second part body (1 b) comprising a welding web (2b) with a self-contained course.
  • the first partial body (1a) and the second partial body (2b) can be provided by any of the methods known to a person skilled in the art, for example by means of injection molding, extrusion or blow molding.
  • Figures 5a to 5d show by way of example the ends of first part-bodies (1a).
  • the ends of the second partial bodies (1b) can have corresponding shapes. It goes without saying that when the first part body (1a) shown in Figures 5a to 5d is welded to a second part body (1b), the course of the welding web (2b) of the second molded body (1b) is preferably a mirror image of the course of the Welding web (2a) of the first part body (1a) is.
  • welding web (2a) of the first part body (1a) and “welding web (2a)” are used synonymously and therefore have the same meaning.
  • welding web (2b) of the second part body (1b) and “welding web (2b)”.
  • the welding web (2a) and the welding web (2b) are different welding webs.
  • the welding web (2a) and the welding web (2b) have an essentially congruent course, so that the two welding webs (2a; 2b) can be welded in process step e) with the formation of a weld seam.
  • the terms “outer surface (3b) of the second part body (1b)” and “outer surface (3b)” are also used synonymously in the context of the present invention and therefore have the same meaning.
  • the terms “inner surface (4a) of the first part body (1a)” and “inner surface (4a)” are used synonymously. These terms therefore also have the same meaning.
  • the terms “inner surface (4b) of the second part body (1b)” and “inner surface (4b)” are used synonymously. These terms therefore also have the same meaning.
  • a tool (5) is provided.
  • the tool (5) provided in step b) comprises a first side (6a) and a second (6b), with the channel (7a) being arranged on the first side (6a) and with the second side ( 6b) the channel (7b) is arranged, wherein the channel (7b) has a closed course and wherein the channel (7b) comprises a means (11b) for supplying hot gas and wherein on the second side (6b) a means (30b) is arranged for active pressure control.
  • the present invention thus relates to a method in which the tool (5) provided in step b) comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and wherein on the second side (6b) a channel (7b) with a self-contained course is arranged, wherein the channel (7b) comprises a means (11b) for supplying hot gas and wherein on the second side (6b) a means (30b) for active pressure regulation is arranged.
  • Figures 1 and 2 show an example of the cross section of the tool (5) on which the first welding body (1a) or the first part body (1a) and the second part body (1b) are positioned.
  • Suitable means (11a) for supplying hot gas into the channel (7a) are all means (11a) known to the person skilled in the art which are suitable for supplying gases, such as nozzles, bores and / or slots. The same applies to the means (11b).
  • the tool (5) comprises a means (30a) for active pressure regulation.
  • Suitable means (30a) are all means (30a) known to the person skilled in the art, with which active pressure regulation is possible.
  • Suitable means (30a) for active pressure regulation are, for example, pumps through which gas can be conveyed.
  • Suitable pumps are, for example, vacuum pumps or ejectors or compressors. The pressure can be reduced with vacuum pumps or ejectors, while the pressure can be increased with compressors.
  • the above statements regarding the means (30a) apply accordingly to the means (30b).
  • the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
  • the means (30a) is preferably positioned on the first side (6a) of the tool (5) in an area which is enclosed by the course of the channel (7a).
  • the subject matter of the present invention is therefore a method in which the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
  • the means (30b) is positioned in an area which is enclosed by the course of the channel (7b). In a further preferred embodiment, the means (30b) is positioned on the second side (6b) of the tool (5) in an area which is enclosed by the channel (7b).
  • the course of the channel (7a) essentially corresponds to the course of the welding web (2a). This means that when the course of the welding web (2a) is projected onto the tool (5), preferably onto the first side (6a) of the tool (5), at least 80% of the area of the projection of the welding web (2a) within the Channel (7a) lie. Preferably at least 90% of the area of the projection of the welding web (2a) lies within the course of the channel (7a), particularly preferably at least 95% and most preferably the projection of the weld seam (2a) lies completely in the channel (7a).
  • the channel (7a) thus has an area which is preferably larger than the area of the course of the welding web (2a) (based on the end face of the welding web (2a)). In this embodiment it is possible that the welding web (2a) can be inserted into the channel (7a).
  • the means (30a) comprises an opening in the tool (5), via which a vacuum pump and / or a compressor can be connected to the tool (5).
  • a vacuum pump and / or a compressor can be connected to the tool (5).
  • first side (6a) of the tool (5) and “first side (6a)” are used synonymously and therefore have the same meaning.
  • second side (6b) of the tool (5) and second side (6b) are also used synonymously in the context of the present invention and therefore also have the same meaning.
  • first side (6a) and the second side (6b) are different sides of the tool (5).
  • the first side (6a) and the second side (6b) are preferably located on opposite sides of the tool (5).
  • channel (7a) and the channel (7b) are different channels.
  • means for supplying hot gas (11a) and the means for supplying hot gas (11b) are also different means.
  • the terms “means for supplying hot gas (11a)” and “means 11 (a)” are also used synonymously in the context of the present invention and therefore have the same meaning.
  • means for supplying hot gas (11b) and “means (11b)”.
  • channel entry level (14a) and the channel entry level (14b) are different channel entry levels.
  • the channel (7a) is preferably arranged on the first side (6a) of the tool (5).
  • the channel (7a) which is arranged on the first side (6a) of the tool (5) also preferably comprises a means (11a) for supplying hot gases.
  • the channel (7b) is preferably arranged on the second side (6b) of the tool (5).
  • the channel (7b), which is arranged on the second side (6b) of the tool (5) also preferably has a means (11b) for supplying hot gas.
  • Hot gas is supplied through the means (11a) and (11b).
  • the means (11a) and (11b) are suitable for heating the welding webs (2a; 2b) in order to subsequently weld them in step e), preferably with the formation of a weld seam.
  • the means (11a; 11b) for supplying hot gas differ from the means (30a; 30b) for active pressure regulation.
  • the means for active pressure regulation (30a; 30b) are not suitable for melting the welding webs (2a; 2b).
  • step c) the welding web (2a) of the first part-body (1a) is positioned in the region of the channel (7a) of the tool (5).
  • a first interior space (20a) is thereby formed between the first partial body (1a) and the tool (5).
  • the first interior space (20a) is preferably formed between the first partial body (1a) and the first side (6a) of the tool (5).
  • the welding web (2b) of the second part body (1b) is additionally positioned in the area of the channel (7b) of the tool (5), whereby between the second part body (1b) and the tool (5 ) forms a second interior space (20b).
  • the second interior space (20b) is preferably formed between the second side (6b) of the tool (5) and the second partial body (1b).
  • step c) additionally includes the positioning of the welding web (2b) of the second partial body (1b) in the region of the channel (7b) of the tool (5), with the second partial body (1 b) and the tool (5) forms a second interior space (20b), and step d) additionally the supply of hot gas through the channel (7b), whereby the welding web (2b) of the second part-body (1b) is melted, and the active regulation of the pressure in the second interior space (20b) by the means (30b).
  • the welding web (2a) is positioned in step c) in a region of the channel (7a), the end face of the welding web (2a) facing the tool (5) being a distance (relative to the channel entry plane (14a)) ( Xa), which lies in the range from> 0 to 3 mm outside the channel (7a) or in the range from 0 to 10 mm inside the channel (7a).
  • the distance (Xa) is preferably in the range from 0.5 to 8 mm within the channel. It goes without saying that the distance (Xa) within the channel (7a) is always smaller than the channel depth of the channel (7a). If the distance (Xa) is in the range from> 0 to 3 mm is outside the channel (7a), the welding web (2a) is outside the channel area.
  • the welding web (2b) is positioned in step c) in a region of the channel (7b), the end face of the welding web (2b) facing the tool (5) being a distance from the channel entry plane (14b) (Xb), which lies in the range from> 0 to 3 mm outside the channel (7b) or in the range from 0 to 10 mm inside the channel (7b).
  • the distance (Xb) is preferably in the range from 0.5 to 8 mm within the channel (7b).
  • the present invention thus relates to a method in which the welding web (2a) is positioned in step c) in an area of the channel (7a), the end face of the welding web (2a) facing the tool (5) in relation to the channel entry plane ( 14a) has a distance (Xa) which is in the range of
  • the subject of the present invention is therefore a method in which the welding web (2b) is positioned in step c) in a region of the channel (7b), the end face of the welding web (2b) facing the tool (5) based on the channel entry plane ( 14b) has a distance (Xb) which is in the range of
  • FIGS. 6a and 6b The preferred positioning of the welding webs (2a, 2b) in the region of the channels (7a, 7b) is shown by way of example in FIGS. 6a and 6b.
  • the end face of the welding web (2a) is positioned within the channel (7a).
  • the distance (Xa) of the end face of the welding web (2a), based on the channel entry plane (14a), is also shown.
  • the end face of the welding web (2a) is located outside the channel (7a) and thus above the channel entry plane (14a).
  • step d) a hot gas is fed through the means (11a) into the channel (7a).
  • the welding web (2a) of the first partial body (1a) heats up and the first thermoplastic polymer contained in the welding web (2a) melts.
  • “one hot gas” means both exactly one hot gas and a mixture of two or more hot gases.
  • step d) the surroundings around the welding web (2a) can also be heated. This is particularly the case when the welding web (2a) is designed in the shape of lines, edges or ribs.
  • the first partial body (1a) contains the first thermoplastic polymer and then also melts the first thermoplastic polymer contained in the area around the welding web (2a).
  • the hot gas can be fed to the means (11a) for feeding gas into the channel (7a) by any of the methods known to those skilled in the art.
  • gases known to the person skilled in the art are suitable as the hot gas.
  • gases are selected, for example, from the group consisting of C0 2 , N 2 and air.
  • the present invention therefore also relates to a method in which the hot gas that is fed in in step d) is selected from the group consisting of C0 2 , N 2 and air.
  • air is understood to mean the gas mixture of the earth's atmosphere. This is known to the person skilled in the art.
  • the hot gas can be heated by any of the methods known to those skilled in the art. For example, it can be heated by a heat exchanger. In addition, it is possible, for example, when the hot gas is C0 2 , that the hot gas is produced in situ by burning hydrocarbons and is therefore hot.
  • the hot gas has, for example, a temperature in the range from 100 to 600.degree. C., preferably in the range from 250 to 500.degree. C. and particularly preferably in the range from 300 to 500.degree.
  • the present invention therefore also relates to a process in which the hot gas which is fed in in step d) has a temperature in the range from 100 to 600.degree.
  • the temperature of the hot gas which is supplied in step d) relates to the temperature which the hot gas has when it emerges from the means (11a) for supplying a gas into the channel (7a), relates, i.e. to the temperature that the hot gas has in the channel (7a).
  • the welding web (2a) of the first partial body (1a) can be heated to any temperature (T 1a ) in step d).
  • the temperature (T 1a ) is usually below the decomposition temperature of the first thermoplastic polymer contained in the welding web (2a).
  • the welding bar (2a) of the first partial body (1a) is heated in step d) to a temperature (T 1a ) which is above the glass transition temperature (T Gi ) of the first thermoplastic polymer contained in the welding bar (2a) when the first thermoplastic polymer is an amorphous thermoplastic polymer, and which is above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding web (2a) when the first thermoplastic polymer is a partially crystalline thermoplastic polymer.
  • T 1a which is above the glass transition temperature (T Gi ) of the first thermoplastic polymer contained in the welding bar (2a) when the first thermoplastic polymer is an amorphous thermoplastic polymer, and which is above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding web (2a) when the first thermoplastic polymer is a partially crystalline thermoplastic polymer.
  • the present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first partial body ( 1a ) is heated to a temperature (T 1a ) which is above the glass transition temperature (T Gi ) of the welding web ( 2a) contained first thermoplastic polymer is when the first thermoplastic polymer is an amorphous thermoplastic polymer, and which is above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding bar (2a) when the first thermoplastic polymer is a partially crystalline thermoplastic polymer is.
  • the welding web (2a) of the first partial body (1a) is heated to a temperature (T 1a ) which is in the range from 0 to 300 ° C, preferably in the range from 30 to 250 ° C and particularly preferably in the range from 60 to 200 ° C above the glass transition temperature (T G1 ) of the first thermoplastic polymer contained in the welding web (2a) if the first thermoplastic polymer is an amorphous thermoplastic polymer, and that in the range from 0 to 300 ° C, preferably in the range from 30 to 250 ° C. and particularly preferably in the range from 60 to 200 ° C. above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding web (2a) if the first thermoplastic polymer is a partially crystalline thermoplastic polymer.
  • T 1a a temperature which is in the range from 0 to 300 ° C, preferably in the range from 30 to 250 ° C and particularly preferably in the range from 60 to 200 ° C above the glass transition temperature (T G1
  • the present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first part body (1a) is raised to a temperature (T 1a ) which is in the range from 0 to 300 ° C above the glass transition temperature (T Gi ) of the first thermoplastic polymer contained in the welding web (2a) is when the first thermoplastic polymer is an amorphous thermoplastic polymer and is in the range from 0 to 300 ° C above the melting temperature (T M1 ) of the in the welding web (2a) contained first thermoplastic polymer is when the first thermoplastic polymer is a partially crystalline thermoplastic polymer, heated.
  • T 1a the glass transition temperature of the first thermoplastic polymer contained in the welding web (2a) is when the first thermoplastic polymer is an amorphous thermoplastic polymer and is in the range from 0 to 300 ° C above the melting temperature (T M1 ) of the in the welding web (2a) contained first thermoplastic polymer is when the first thermoplastic polymer is a partially crystalline
  • the present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first part body ( 1a ) is heated to a temperature (T 1a ) which is in the range from 100 to 500.degree.
  • step d) the first thermoplastic polymer melts or softens.
  • thermoplastic polymer in connection with the first thermoplastic polymer as well as in connection with the second thermoplastic polymer is understood to mean that the first thermoplastic polymer or the second thermoplastic polymer is plastically deformable, preferably flowable.
  • step d) the pressure in the first interior space (20a) is actively regulated by means (30a).
  • the active regulation of the pressure can be carried out for the entire duration of step d). In other words, this means that the active regulation of the pressure is carried out simultaneously with the supply of hot gas through the channel (7a). In this embodiment, the active pressure regulation is carried out as long as hot gas is supplied through the channel (7a). This embodiment is preferred.
  • gas is removed from the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b).
  • the gas is preferably discharged actively by pumping out or sucking off. This is preferably done during step d).
  • gas is supplied to the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b).
  • the supply is preferably carried out actively by pressing in or pumping in. This is preferably done during process step d).
  • hot gas is supplied through the channel (7a). Without the active pressure regulation according to the invention, this occurs in the first Interior (20a) an internal pressure (pl) which is higher than the external pressure (pA). Due to the fact that the internal pressure (pl) is greater than the external pressure (pA), without active pressure regulation during process step d), more hot gas flows past the side of the welding web (2a) facing away from the first interior space (20a) than the one first interior space (20a) facing side of the welding web (2a). As a result, the side of the welding web (2a) facing away from the first interior space (20a) is heated to a greater extent than the side of the welding web (2a) facing the first interior space (20a). The same also applies to the heating of the second welding web (2b).
  • the different degrees of melting in method step e) when the welding webs (2a), (2b) are brought into contact result in asymmetrical weld seams.
  • the internal pressure (pl) in the first interior space (20a) is greater than the external pressure (pA)
  • asymmetrical weld seams are obtained.
  • a weld seam is obtained which, in relation to the first interior space (20a), is curved outward.
  • the active pressure regulation by means (30a) makes it possible and preferred according to the invention to carry out method step d) in such a way that the difference between internal pressure (pl) and external pressure (pA) in the first interior space (30a) is essentially the same.
  • the pressure difference between internal pressure (pi) and external pressure (pA) is preferably a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5%. In this way, symmetrical weld seams are obtained, as shown by way of example in FIGS. 7 and 8.
  • the internal pressure (pi) is thus a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5% above the external pressure (pA).
  • the internal pressure (pi) is a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5% below the external pressure (pA).
  • the active pressure regulation therefore makes it possible according to the invention to actively influence the symmetry of the weld seam.
  • the active pressure regulation is carried out in such a way that a symmetrical weld seam is obtained.
  • the present invention thus relates to a method in which gas is removed from the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b).
  • the internal pressure (p1) in process step d) is preferably regulated in such a way that it is at least 10%, preferably at least 30% and particularly preferably at least 50% above the external pressure.
  • the present invention thus relates to a method in which gas is supplied to the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b).
  • the symmetry of the weld seam is controlled in such a way that it has a bead on the side facing the first interior space (20a).
  • the internal pressure (pi) is regulated during process step d) in such a way that it is at least 10%, preferably at least 30% and particularly preferably at least 50% below the external pressure (pA).
  • the above apply made statements and preferences with regard to the melting of the welding web (2a) and the active regulation of the pressure in the first interior space (20a) by the means (30a) accordingly.
  • step e) the melted welding web (2a) of the first partial body (1a) is brought into contact with the welding web (2b) of the second partial body (1b), the course of the welding web (2b) essentially following the course of the welding web (2a ) corresponds.
  • the course of the welding web (2b) is a mirror image of the course of the welding web (2a).
  • “Bringing into contact” is understood here to mean that the heated welding web (2a) of the first part body (1a) touches the heated welding web (2b) of the second part body (1b).
  • the heated welding web (2a) of the first partial body (1a) can be brought into contact with the heated welding web (2b) of the second partial body (1b) so that the heated welding web (2a) of the first partial body (1a) and the heated welding web ( 2b) of the second part-body (1b) are pressed against one another.
  • Processes for this are known to the person skilled in the art.
  • the pressure when the heated welding web (2a) of the first partial body (1a) is brought into contact with the welding web (2b) of the second partial body (1b) is in the range from 0.1 to 10 MPa, preferably in the range from 0.5 to 6 MPa .
  • thermoplastic polymers contained in the welding webs (2a, 2b) bond. After being brought into contact, the heated welding webs (2a, 2b) are cooled, whereby the welded joint is created.
  • heated weld web (2a, 2b) and melted weld web (2a, 2b)" or “softened weld web (2a, 2b)” are used synonymously here.
  • the heated welding web (2a) of the first partial body (1a) and the heated welding web (2b) of the second partial body (1b) in step e) can be cooled using any of the methods known to those skilled in the art.
  • the cooling can take place in air.
  • step e) a weld seam is formed between the first partial body (1a) and the second partial body (1b).
  • the weld seam is located in the area in which the welding web (2a) of the first part body (1a) and the welding web (2b) of the second part body (1b) were originally.
  • a weld seam is known as such to the person skilled in the art.
  • the thickness of the weld seam between the first partial body (1a) and the second partial body (1b) is, for example, in the range from 20 to 1000 ⁇ m, preferably in the range from 30 to 400 ⁇ m and most preferably in the range from 30 to 300 ⁇ m, determined by Microscopic recordings.
  • the present invention therefore also relates to a method in which the weld seam formed in step e) between the first partial body (1a) and the second partial body (1b) has a thickness in the range from 20 to 1000 ⁇ m.
  • step e) the shaped body which encloses a cavity is thus obtained.
  • This shaped body is characterized by a particularly homogeneous weld seam and good mechanical properties.
  • the cavity is formed by the first interior space (20a) and the second interior space (20b).
  • the present invention thus provides a molded body which encloses a cavity, obtainable by the process according to the invention.
  • Tool (5) The present invention also relates to the tool (5) which is provided in process step b).
  • the statements made above and preferences with regard to the method apply accordingly to the tool (5).
  • a tool (5) for welding two sub-bodies (1a, 1b) which tool comprises a channel (7a) with a self-contained course, the channel (7a) comprising means (11a) for supplying hot gas and wherein in the region of the channel (7a) a welding bar (2a) of the first part body (1a) can be positioned, the course of the welding bar (2a) essentially corresponding to the course of the channel (7a), with (1a) and the tool (5) can form a first interior space (20a) and wherein the tool (5) comprises a means (30a) for active pressure regulation.
  • the present invention thus relates to a tool (5) for welding two partial bodies (1a, 1b), which comprises a channel (7a) with a self-contained course, the channel (7a) having means (11a) for supplying comprises hot gas and wherein a welding web (2a) of the first part-body (1a) can be positioned in the region of the channel (7a), the course of the welding web (2a) essentially corresponding to the course of the channel (7a), with between the first partial body (1a) and the tool (5) can form a first interior space (20a) and wherein the tool (5) comprises a means (30a) for active pressure regulation.
  • the means (30a) for actively regulating the pressure is positioned in an area which is enclosed by the course of the channel (7a).
  • the present invention thus provides a tool (5) in which the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
  • a tool (5) which comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and the tool (5) having a channel ( 7b) with a self-contained course, wherein the channel (7b) comprises means (11b) for the supply of hot gas and wherein a welding web (2b) of the second part-body (1b) is positioned in the region of the channel (7b) can be, the course of the welding web (2b) essentially corresponds to the course of the channel (7b), wherein a second interior space (20b) can form between the second part body (1b) and the tool (5) and the tool ( 5) comprises a means (30b) for active pressure regulation and wherein the channel (7b) is arranged on the second side (6b) of the tool (5).
  • the present invention thus provides a tool (5) which comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and the tool (5) comprises a channel (7b) with a self-contained course, wherein the channel (7b) comprises means (11b) for supplying hot gas and wherein in the region of the channel (7b) a welding web (2b) of the second part body (1 b) can be positioned, the course of the welding web (2b) essentially corresponding to the course of the channel (7b), wherein a second interior space (20b) can be formed between the second partial body (1b) and the tool (5) and wherein the tool (5) comprises a means (30b) for active pressure regulation and wherein the channel (7b) is arranged on the second side (6b) of the tool (5).
  • a tool (5) is particularly preferred in which the means (30b) is positioned in an area which is enclosed by the course of the channel (7b).
  • the present invention thus provides a tool (5) in which the means (30b) is positioned in an area which is enclosed by the course of the channel (7b).
  • the present invention thus relates to a method in which the means (30a) is positioned in the first part body (1a) and / or the means (30b) is positioned in the second part body (1b).
  • 11a means for supplying hot gas 11b means for supplying hot gas 14a channel inlet level

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a method for producing a moulded body that encloses a cavity by welding two partial bodies (1a, 1b), and to a die (5) by means of which the method for producing the moulded body can be carried out. The present invention also relates to the moulded body that can be obtained by the method according to the invention.

Description

Verfahren zur Herstellung eines Formkörpers, der einen Hohlraum umschließt, durch Verschweißen von zwei Teilkörpern und Werkzeug zum Verschweißen von zwei Teilkörpern Process for the production of a shaped body which encloses a cavity by welding two part bodies and a tool for welding two part bodies
Beschreibung description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Formkörpers, der einen Hohlraum umschließt, durch Verschweißen von zwei Teilkörpern (1a, 1b) sowie ein Werkzeug (5), mit dem das Verfahren zur Herstellung des Formkörpers durchführbar ist. Darüber hinaus betrifft die vorliegende Erfindung den Formkörper, der durch das erfindungsgemäße Verfahren erhältlich ist. The present invention relates to a method for producing a molded body which encloses a cavity by welding two part bodies (1a, 1b) and a tool (5) with which the method for producing the molded body can be carried out. The present invention also relates to the shaped body which can be obtained by the process according to the invention.
Zur Herstellung von komplexen Formkörpern, wie beispielsweise von hohlen Formkörpern, ist es notwendig, zwei oder mehrere Teilkörper miteinander zu verschweißen. Hierzu sind im Stand der Technik verschiedene Verfahren beschrieben. For the production of complex shaped bodies, such as hollow shaped bodies, it is necessary to weld two or more part bodies together. Various methods are described in the prior art for this purpose.
Die EP 1 415 789 beschreibt ein Werkzeug, das zwischen zwei zu verbindende Kunststoffteile eingeführt wird. Dieses Werkzeug kann die zu verschweißenden Flächen der zu verbindenden Kunststoffteile berührungsfrei durch Strahlungswärme und einen heißen Inertgasstrom erhitzen. EP 1 415 789 describes a tool that is inserted between two plastic parts to be connected. This tool can heat the surfaces to be welded of the plastic parts to be connected by means of radiant heat and a hot inert gas stream.
Nachteilig bei dem in der EP 1 415 789 beschriebenen Verfahren ist, dass die Gasaustrittsöffnungen Düsenöffnungen sind und diese den Schweißnahtbereich nur punktuell erwärmen. Daher ist keine gleichmäßige Erwärmung des Schweißnahtbereichs möglich. Stattdessen kann es zu lokaler Überhitzung und lokalem Abbau des in den Kunststoffteilen enthaltenen Polymers kommen, gleichzeitig gibt es Schweißnahtbereiche, an denen das Kunststoffteil bzw. das in diesem enthaltene Polymer nicht ausreichend aufschmilzt, so dass die an diesen Stellen ausgebildete Schweißnaht geschwächt ist. Weisen die zu verschweißenden Formkörper außerdem einen Verzug auf, so wird die ungleichmäßige Erwärmung zusätzlich verstärkt. Durch die resultierenden Temperaturschwankungen entlang des Schweißnahtbereichs ergeben sich unterschiedlich starke Aufschmelzungen des Polymers, was zu schwankenden Qualitäten entlang der Schweißnaht führt. The disadvantage of the method described in EP 1 415 789 is that the gas outlet openings are nozzle openings and these only heat the weld seam area at certain points. Uniform heating of the weld seam area is therefore not possible. Instead, local overheating and local degradation of the polymer contained in the plastic parts can occur, at the same time there are weld seam areas where the plastic part or the polymer contained therein does not melt sufficiently, so that the weld seam formed at these points is weakened. If the molded bodies to be welded are also warped, the uneven heating is additionally increased. The resulting temperature fluctuations along the weld seam area result in different degrees of melting of the polymer, which leads to fluctuating qualities along the weld seam.
Die WO 2017/198483 offenbart ein Verfahren zum Verschweißen von Formkörpern, wobei das Ende (2a) eines ersten Formkörpers (1a) mit Hilfe eines Kanals (7a) durch ein Mittel (11a) zum Zuführen eines heißen Gases aufgeschmolzen wird und wobei die Fügefläche (2b) des zweiten Formkörpers (1b) ebenfalls mit Hilfe eines Kanals (7b), der ein Mittel (11 b) zum Zuführen eines heißen Gases umfasst, aufgeschmolzen wird und wobei das erwärmte Ende (2a) des ersten Formkörpers (1a) mit der erwärmten Fügefläche (2b) des zweiten Formkörpers (1 b) verbunden wird. Das in der WO 2017/198483 beschriebene Verfahren ermöglicht ein gleichmäßiges Aufschmelzen der Fügefläche (2a) und der Fügefläche (2b), wodurch im Allgemeinen eine gleichmäßige Schweißnaht erhalten wird. WO 2017/198483 discloses a method for welding shaped bodies, the end (2a) of a first shaped body (1a) being melted with the aid of a channel (7a) through a means (11a) for supplying a hot gas, and the joining surface ( 2b) of the second molded body (1b) is also melted with the aid of a channel (7b) which comprises a means (11b) for supplying a hot gas, and the heated end (2a) of the first molded body (1a) with the heated Joining surface (2b) of the second molded body (1b) is connected. The method described in WO 2017/198483 enables a uniform melting of the Joining surface (2a) and the joining surface (2b), whereby a uniform weld seam is generally obtained.
Für den Fall, dass mit dem in der WO 2017/198483 beschriebenen Verfahren Teilkörper verschweißt werden, die eine Öffnung aufweisen, an die sich eine geschlossene Außenfläche anschließt, werden in einigen Fällen Schweißnähte erhalten, die unsymmetrisch sind. Dies kann in einigen Fällen zu einer reduzierten Festigkeit der Schweißnaht führen. Die der vorliegenden Erfindung zugrunde liegende Aufgabe besteht somit darin, ein Verfahren zur Herstellung von Formkörpern, die einen Hohlraum umschließen, durch Verschweißen von zwei Teilkörpern bereitzustellen, das die vorstehend beschriebenen Nachteile der Verfahren aus dem Stand der Technik nicht oder nur in vermindertem Maße aufweist. Zudem soll das Verfahren möglichst einfach und kostengünstig durchführbar sein. In the event that the method described in WO 2017/198483 is used to weld partial bodies which have an opening that is adjoined by a closed outer surface, in some cases weld seams are obtained that are asymmetrical. In some cases, this can lead to reduced weld strength. The object on which the present invention is based is thus to provide a method for producing moldings that enclose a cavity by welding two part-bodies, which does not have the disadvantages of the prior art methods described above or only to a reduced extent. In addition, the method should be able to be carried out as simply and inexpensively as possible.
Gelöst wird diese Aufgabe durch ein Verfahren zur Herstellung eines Formkörpers, der einen Hohlraum umschließt, durch Verschweißen von zwei Teilkörpern (1a, 1 b), umfassend die Schritte a), b), c), d) und e): a) Bereitstellen des ersten Teilkörpers (1a), wobei der erste Teilkörper (1a) einen Schweißsteg (2a) mit einem in sich geschlossenen Verlauf umfasst, b) Bereitstellen eines Werkzeuges (5), das einen Kanal (7a) mit einem in sich geschlossenen Verlauf umfasst, wobei der Verlauf des Kanals (7a) im Wesentlichen dem Verlauf des Schweißstegs (2a) entspricht, wobei der Kanal (7a) Mittel (11a) zur Zuführung von heißem Gas umfasst und wobei das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung umfasst, c) Positionieren des Schweißstegs (2a) des ersten Teilkörpers (1a) im Bereich des Kanals (7a) des Werkzeugs (5), wobei sich zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) ausbildet, d) Zuführen von heißem Gas durch den Kanal (7a), wodurch der Schweiß steg (2a) des ersten Teilkörpers (1a) aufgeschmolzen wird, und aktive Regelung des Drucks im ersten Innenraum (20a) durch das Mittel (30a) und e) Inkontaktbringen des aufgeschmolzenen Schweißstegs (2a) des ersten Teilkörpers mit einem Schweißsteg (2b) des zweiten Teilkörpers (1b),This object is achieved by a method for producing a shaped body which encloses a cavity by welding two part bodies (1a, 1b), comprising the steps a), b), c), d) and e): a) Providing of the first part-body (1a), the first part-body (1a) comprising a welded web (2a) with a self-contained course, b) providing a tool (5) which comprises a channel (7a) with a self-contained course, wherein the course of the channel (7a) essentially corresponds to the course of the welding web (2a), wherein the channel (7a) comprises means (11a) for supplying hot gas and wherein the tool (5) has a means (30a) for active pressure regulation comprises, c) positioning the welding web (2a) of the first part body (1a) in the region of the channel (7a) of the tool (5), with a first interior space (20a) between the first part body (1a) and the tool (5) forms, d) supplying hot gas through the channel (7a), whereby the sweat ß web (2a) of the first part body (1a) is melted, and active regulation of the pressure in the first interior space (20a) by means (30a) and e) bringing the melted welding bar (2a) of the first part body into contact with a welding bar (2b) of the second part body (1b),
EB18-2055 PC wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Schweißstegs (2a) entspricht. EB18-2055 PC wherein the course of the welding web (2b) essentially corresponds to the course of the welding web (2a).
Es wurde überraschend gefunden, dass mit dem erfindungsgemäßen Verfahren der Schweißsteg (2a) des ersten Teilkörpers (1a) gleichmäßiger erwärmt werden kann, wodurch bessere Schweißnahtqualitäten erhalten werden. In einer bevorzugten Ausführungsform gilt dies auch für den Schweißsteg (2b) des zweiten Teilkörpers (1b), der nach einer bevorzugten Ausführungsform der vorliegenden Erfindung ebenfalls gleichmäßiger erwärmt werden kann. Die besseren Schweißnahtqualitäten resultieren aus dem gleichmäßigeren Aufschmelzen des Schweißstegs (2a) und/oder des Schweißstegs (2b), wodurch eine besonders gleichmäßige Dicke der Schweißnaht sowie eine höhere Symmetrie der Schweißnaht erhalten wird. It was surprisingly found that with the method according to the invention, the welding web (2a) of the first part body (1a) can be heated more evenly, as a result of which better weld seam qualities are obtained. In a preferred embodiment, this also applies to the welding web (2b) of the second part-body (1b), which according to a preferred embodiment of the present invention can also be heated more evenly. The better weld seam quality results from the more uniform melting of the weld web (2a) and / or the weld web (2b), which results in a particularly even thickness of the weld seam and a higher symmetry of the weld seam.
Zudem ist das erfindungsgemäße Verfahren teilweise schneller durchführbar als die im Stand der Technik beschriebenen Verfahren und resultiert daher in kürzeren Zykluszeiten als die im Stand der Technik beschriebenen Verfahren. Im Rahmen der vorliegenden Erfindung wird unter der Zykluszeit der Zeitraum vom Beginn der Positionierung des ersten Teilkörpers (1a) und des zweiten Teilkörpers (1b) in Schritt c) bis zum Erhalt des Formkörpers, der einen Hohlraum umschließt, in Schritt e) verstanden. In addition, the method according to the invention can in part be carried out more quickly than the methods described in the prior art and therefore results in shorter cycle times than the methods described in the prior art. In the context of the present invention, the cycle time is understood to mean the period from the beginning of the positioning of the first partial body (1a) and the second partial body (1b) in step c) until the molding, which encloses a cavity, is obtained in step e).
Nachfolgend wird die Erfindung näher erläutert. The invention is explained in more detail below.
Schritt a) Step a)
In Schritt a) wird der erste Teilkörper (1a) bereitgestellt. In step a) the first partial body (1a) is provided.
Der erste Teilkörper (1a) umfasst erfindungsgemäß einen Schweißsteg (2a) mit einem in sich geschlossenen Verlauf. In einer bevorzugten Ausführungsform umfasst der erste Teilkörper (1a) eine Öffnung, die durch den Schweißsteg (2a) begrenzt wird. An den Schweißsteg (2a) schließt sich in einer bevorzugten Ausführungsform eine Außenfläche (3a) an, die im Wesentlichen geschlossen ist. Die Außenfläche (3a) begrenzt den Teilkörper (1a) nach außen. According to the invention, the first part body (1a) comprises a welding web (2a) with a self-contained course. In a preferred embodiment, the first part body (1a) comprises an opening which is delimited by the welding web (2a). In a preferred embodiment, the welding web (2a) is adjoined by an outer surface (3a) which is essentially closed. The outer surface (3a) delimits the body part (1a) to the outside.
Der Begriff „im Wesentlichen geschlossen“ bedeutet erfindungsgemäß, dass die Außenfläche (3a), bezogen auf die Gesamtfläche der Außenfläche (3a), weniger als 10 %, bevorzugt weniger als 5 % und besonders bevorzugt weniger als 2,5 % Öffnungsflächen aufweist. In einer besonders bevorzugten Ausführungsform weist die Außenfläche (3a) keine Öffnungen auf. Durch den Bereich, der zwischen der vom Schweißsteg (2a) aufgespannten Fläche und der Innenfläche (4a) des ersten Teilkörpers (1a) liegt, wird ein erster Innenraum (20a) des ersten Teilkörpers (1a) definiert. Figur 3a zeigt exemplarisch die Aufsicht eines halbkugelförmigen Teilkörpers (1a) mit einem Schweißsteg (2a). Der Schweißsteg (2a) definiert das Ende des ersten Teilkörpers (1a). According to the invention, the term “essentially closed” means that the outer surface (3a), based on the total area of the outer surface (3a), has less than 10%, preferably less than 5% and particularly preferably less than 2.5% opening areas. In a particularly preferred embodiment, the outer surface (3a) has no openings. A first interior space (20a) of the first partial body (1a) is defined by the area between the surface spanned by the welding web (2a) and the inner surface (4a) of the first partial body (1a). Figure 3a shows an example of the top view of a hemispherical part body (1a) with a welding bar (2a). The welding web (2a) defines the end of the first part-body (1a).
Der Schweißsteg (2a) kann in allen dem Fachmann bekannten Formen ausgestaltet sein. Beispielsweise kann der Schweißsteg (2a) flächenförmig, kantenförmig, treppenförmig oder rippenförmig ausgestaltet sein. In einer bevorzugten Ausführungsform ist der Schweißsteg (2a) rippenförmig ausgestaltet, wobei die Rippe einen rechtwinkligen Querschnitt aufweist. Die Breite des Schweißstegs (2a) liegt üblicherweise im Bereich von 0,5 bis 16 mm, bevorzugt im Bereich von 1 bis 10 mm und besonders bevorzugt im Bereich von 2 bis 8 mm. The welding web (2a) can be designed in all forms known to the person skilled in the art. For example, the welding web (2a) can be flat, edge-shaped, step-shaped or rib-shaped. In a preferred embodiment, the welding web (2a) is rib-shaped, the rib having a right-angled cross section. The width of the welding web (2a) is usually in the range from 0.5 to 16 mm, preferably in the range from 1 to 10 mm and particularly preferably in the range from 2 to 8 mm.
Für den Fall, dass die Breite des Endes des ersten Teilkörpers (1a) im Bereich von 1 bis 6 mm liegt, kann das Ende des ersten Teilkörpers (1a) selbst den Schweißsteg (2a) bilden. Figur (3b) zeigt exemplarisch eine perspektivische Darstellung eines halbkugelförmigen Teilkörpers (1a), bei dem das Ende des Teilkörpers (1a) den Schweißsteg (2a) bildet. In the event that the width of the end of the first part body (1a) is in the range from 1 to 6 mm, the end of the first part body (1a) can itself form the welding web (2a). Figure (3b) shows an example of a perspective view of a hemispherical part body (1a), in which the end of the part body (1a) forms the welding web (2a).
Der Schweißsteg (2a) enthält in einer bevorzugten Ausführungsform ein erstes thermoplastisches Polymer. In a preferred embodiment, the welding bar (2a) contains a first thermoplastic polymer.
„Ein erstes thermoplastisches Polymer“ bedeutet im Rahmen der vorliegenden Erfindung sowohl genau ein erstes thermoplastisches Polymer, als auch eine Mischung aus zwei oder mehreren ersten thermoplastischen Polymeren. In the context of the present invention, “a first thermoplastic polymer” means both precisely one first thermoplastic polymer and a mixture of two or more first thermoplastic polymers.
Als erstes thermoplastisches Polymer eignen sich alle dem Fachmann bekannten thermoplastischen Polymere. Bevorzugt ist das erste thermoplastische Polymer ausgewählt aus der Gruppe bestehend aus amorphen thermoplastischen Polymeren und teilkristallinen thermoplastischen Polymeren. All thermoplastic polymers known to the person skilled in the art are suitable as the first thermoplastic polymer. The first thermoplastic polymer is preferably selected from the group consisting of amorphous thermoplastic polymers and partially crystalline thermoplastic polymers.
Das erste thermoplastische Polymer ist daher beispielsweise ausgewählt aus der Gruppe bestehend aus Polyamiden, Polyoxymethylenen, Polyphthalamid (PPA), Polysulfonen (PSU), Polyethersulfonen (PESU), Polyphenylsulfonen (PPSU),The first thermoplastic polymer is therefore selected, for example, from the group consisting of polyamides, polyoxymethylenes, polyphthalamides (PPA), polysulfones (PSU), polyether sulfones (PESU), polyphenyl sulfones (PPSU),
Polyethylenterephthalaten und Polybutylenterephthalaten. Polyethylene terephthalates and polybutylene terephthalates.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem das in dem Schweißsteg (2a) enthaltene erste thermoplastische Polymer ausgewählt ist aus der Gruppe bestehend aus Polyamiden, Polyoxymethylenen, Polyphthalamid (PPA), Polysulfonen (PSU), Polyethersulfonen (PESU), Polyphenylsulfonen (PPSU),The present invention therefore also relates to a method in which the first thermoplastic polymer contained in the welding web (2a) is selected from the group consisting of polyamides, polyoxymethylenes, polyphthalamides (PPA), polysulfones (PSU), polyether sulfones (PESU), and polyphenyl sulfones (PPSU),
Polyethylenterephthalaten und Polybutylenterephthalaten. Polyethylene terephthalates and polybutylene terephthalates.
Das erste thermoplastische Polymer weist üblicherweise eine Glasübergangstemperatur (TGi) auf. Beispielsweise liegt die Glasübergangstemperatur (TGi) des ersten thermoplastischen Polymers im Bereich von 50 bis 350 °C, bevorzugt im Bereich von 150 bis 270 °C und insbesondere bevorzugt im Bereich von 170 bis 240 °C, bestimmt mittels Dynamischer Differenzkalorimetrie (Differential Scanning Calorimetry; DSC). The first thermoplastic polymer usually has a glass transition temperature (T Gi ). For example, the Glass transition temperature (T Gi ) of the first thermoplastic polymer in the range from 50 to 350 ° C, preferably in the range from 150 to 270 ° C and particularly preferably in the range from 170 to 240 ° C, determined by means of differential scanning calorimetry (DSC) .
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem das erste thermoplastische Polymer eine Glasübergangstemperatur (TGi), die im Bereich von 50 bis 350 °C liegt, aufweist. The present invention therefore also relates to a process in which the first thermoplastic polymer has a glass transition temperature (T Gi ) which is in the range from 50 to 350.degree.
Ist das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer, so weist das erste thermoplastische Polymer üblicherweise zusätzlich eine Schmelztemperatur (TM1) auf. Beispielsweise liegt die Schmelztemperatur (TM1) des ersten thermoplastischen Polymers dann im Bereich von 80 bis 400 °C, bevorzugt im Bereich von 140 bis 320 °C und insbesondere bevorzugt im Bereich von 160 bis 300 °C, bestimmt mittels Dynamischer Differenzkalorimetrie (Differential Scanning Calorimetry; DSC). If the first thermoplastic polymer is a partially crystalline thermoplastic polymer, the first thermoplastic polymer usually also has a melting temperature (T M1 ). For example, the melting temperature (T M1 ) of the first thermoplastic polymer is then in the range from 80 to 400 ° C., preferably in the range from 140 to 320 ° C. and particularly preferably in the range from 160 to 300 ° C., determined by means of dynamic differential calorimetry (differential scanning Calorimetry; DSC).
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem das erste thermoplastische Polymer, wenn das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer ist, eine Schmelztemperatur (TM1), die im Bereich von 80 bis 400 °C liegt, aufweist. The present invention therefore also provides a method in which the first thermoplastic polymer, if the first thermoplastic polymer is a partially crystalline thermoplastic polymer, has a melting temperature (T M1 ) which is in the range from 80 to 400.degree.
Der Schweißsteg (2a) des ersten Teilkörpers (1a) kann außer dem ersten thermoplastischen Polymer zusätzlich weitere Komponenten enthalten. Derartige weitere Komponenten sind dem Fachmann bekannt und beispielsweise ausgewählt aus der Gruppe bestehend aus Füllstoffen und Additiven. In addition to the first thermoplastic polymer, the welding bar (2a) of the first partial body (1a) can also contain other components. Such further components are known to the person skilled in the art and are selected, for example, from the group consisting of fillers and additives.
Als Füllstoffe eigenen sich alle dem Fachmann bekannten Füllstoffe für thermoplastische Polymere. Derartige Füllstoffe sind beispielsweise ausgewählt aus der Gruppe bestehend aus Glaskugeln, Glasfasern, Kohlefasern, Carbonnanotubes und Kreide. All fillers known to the person skilled in the art for thermoplastic polymers are suitable as fillers. Such fillers are selected, for example, from the group consisting of glass spheres, glass fibers, carbon fibers, carbon nanotubes and chalk.
Geeignete Additive sind dem Fachmann ebenfalls bekannt und beispielsweise ausgewählt aus der Gruppe bestehend aus Antinukleierungsmitteln, Stabilisatoren, Endgruppenfunktionalisierern und Farbstoffen. Suitable additives are also known to the person skilled in the art and are selected, for example, from the group consisting of anti-nucleating agents, stabilizers, end group functionalizers and dyes.
Bevorzugt enthält der erste Teilkörper (1a) das erste thermoplastische Polymer. Insbesondere bevorzugt enthält der erste Teilkörper (1a) dieselben Komponenten wie der Schweißsteg (2a). Wenn der Schweißsteg (2a) also außer dem ersten thermoplastischen Polymer zusätzlich weitere Komponenten enthält, so ist es bevorzugt, dass der erste Teilkörper (1a) ebenfalls außer dem ersten thermoplastischen Polymer die weiteren Komponenten enthält. Der erste Teilkörper (1a) kann alle dem Fachmann bekannten Formen aufweisen. Bevorzugt weist der erste Teilkörper (1a) Formen auf, bei denen die vorstehend genannten erfindungsgemäß bevorzugten Bedingungen erfüllt sind. Der Formkörper weist bevorzugt eine schalenförmige oder kistenförmige Form auf, wobei die durch den Schweißstegverlauf (2a) definierte Form sowie die Form der Außenseite (3a) und der Innenseite (4a) komplexe Formen aufweisen können, wie sie beispielsweise im Automobilbau erforderlich sind. The first partial body (1a) preferably contains the first thermoplastic polymer. Particularly preferably, the first part body (1a) contains the same components as the welding web (2a). If the welding bar (2a) therefore contains further components in addition to the first thermoplastic polymer, it is preferred that the first part-body (1a) also contains the further components in addition to the first thermoplastic polymer. The first part body (1a) can have any shape known to the person skilled in the art. The first partial body (1a) preferably has shapes in which the aforementioned preferred conditions according to the invention are met. The molded body preferably has a bowl-shaped or box-shaped shape, the shape defined by the welding web course (2a) as well as the shape of the outside (3a) and the inside (4a) can have complex shapes, such as are required in automobile construction, for example.
In einer bevorzugten Ausführungsform wird in Schritt a) zusätzlich ein zweiter Teilkörper (1 b) bereitgestellt, wobei der zweite Teilkörper (1b) einen Schweißsteg (2b) mit einem in sich geschlossenen Verlauf umfasst. Für den zweiten Teilkörper (1b) gelten die vorstehend zum ersten Teilkörper (1a) gemachten Ausführungen und Bevorzugungen entsprechend. In a preferred embodiment, a second partial body (1b) is additionally provided in step a), the second partial body (1b) comprising a welding web (2b) with a self-contained course. For the second part body (1b), the statements and preferences made above for the first part body (1a) apply accordingly.
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem Schritt a) zusätzlich die Bereitstellung des zweiten Teilkörpers (1 b) umfasst, wobei der zweite Teilkörper (1 b) einen Schweißsteg (2b) mit einem in sich geschlossenen Verlauf umfasst. The present invention thus relates to a method in which step a) additionally comprises the provision of the second part body (1 b), the second part body (1 b) comprising a welding web (2b) with a self-contained course.
Die Bereitstellung des ersten Teilkörpers (1a) und des zweiten Teilkörpers (2b) kann nach allen dem Fachmann bekannten Methoden erfolgen, beispielsweise mittels Spritzgießen, Extrusion oder Blasformen. Die Figuren 5a bis 5d zeigen beispielhaft die Enden von ersten Teilkörpern (1a). Die Enden der zweiten Teilkörper (1 b) können entsprechende Formen aufweisen. Es versteht sich von selbst, dass, wenn der in den Figuren 5a bis 5d gezeigte erste Teilkörper (1a) mit einem zweiten Teilkörper (1b) verschweißt wird, der Verlauf des Schweißstegs (2b) des zweiten Formkörpers (1b) bevorzugt spiegelbildlich zum Verlauf des Schweißstegs (2a) des ersten Teilkörpers (1a) ist. The first partial body (1a) and the second partial body (2b) can be provided by any of the methods known to a person skilled in the art, for example by means of injection molding, extrusion or blow molding. Figures 5a to 5d show by way of example the ends of first part-bodies (1a). The ends of the second partial bodies (1b) can have corresponding shapes. It goes without saying that when the first part body (1a) shown in Figures 5a to 5d is welded to a second part body (1b), the course of the welding web (2b) of the second molded body (1b) is preferably a mirror image of the course of the Welding web (2a) of the first part body (1a) is.
Im Rahmen der vorliegenden Erfindung werden die Begriffe“Schweißsteg (2a) des ersten Teilkörpers (1a)“ und„Schweißsteg (2a)“ synonym gebraucht und haben daher die gleiche Bedeutung. Gleiches gilt auch für die Begriffe„Schweißsteg (2b) des zweiten Teilkörpers (1 b)“ und„Schweißsteg (2b)“. Diese Begriffe werden im Rahmen der vorliegenden Erfindung ebenfalls synonym gebraucht und haben daher ebenfalls die gleiche Bedeutung. In the context of the present invention, the terms “welding web (2a) of the first part body (1a)” and “welding web (2a)” are used synonymously and therefore have the same meaning. The same also applies to the terms "welding web (2b) of the second part body (1b)" and "welding web (2b)". These terms are also used synonymously in the context of the present invention and therefore also have the same meaning.
Es versteht sich zudem von selbst, dass es sich bei dem Schweißsteg (2a) und dem Schweißsteg (2b) um unterschiedliche Schweißstege handelt. Der Schweißsteg (2a) und der Schweißsteg (2b) haben in einer bevorzugten Ausführungsform einen im Wesentlichen kongruenten Verlauf, so dass die beiden Schweißstege (2a;2b) in Verfahrensschritt e) unter Ausbildung einer Schweißnaht verschweißt werden können. Entsprechendes gilt auch für die Begriffe„Außenfläche (3a) des ersten Teilkörpers (1a)“ und„Außenfläche (3a)“. Diese Begriffe werden im Rahmen der vorliegenden Erfindung ebenfalls synonym gebraucht und haben daher die gleiche Bedeutung. Die Begriffe „Außenfläche (3b) des zweiten Teilkörpers (1b)“ und „Außenfläche (3b)“ werden im Rahmen der vorliegenden Erfindung ebenfalls synonym gebraucht und haben daher die gleiche Bedeutung. It also goes without saying that the welding web (2a) and the welding web (2b) are different welding webs. In a preferred embodiment, the welding web (2a) and the welding web (2b) have an essentially congruent course, so that the two welding webs (2a; 2b) can be welded in process step e) with the formation of a weld seam. The same applies to the terms “outer surface (3a) of the first part body (1a)” and “outer surface (3a)”. These terms are also used synonymously in the context of the present invention and therefore have the same meaning. The terms “outer surface (3b) of the second part body (1b)” and “outer surface (3b)” are also used synonymously in the context of the present invention and therefore have the same meaning.
Im Rahmen der vorliegenden Erfindung werden darüber hinaus die Begriffe „Innenfläche (4a) des ersten Teilkörpers (1a)“ und „Innenfläche (4a)“ synonym gebraucht. Diese Begriffe haben daher ebenfalls die gleiche Bedeutung. Im Rahmen der vorliegenden Erfindung werden darüber hinaus die Begriffe„Innenfläche (4b) des zweiten Teilkörpers (1b)“ und„Innenfläche (4b)“ synonym gebraucht. Diese Begriffe haben daher ebenfalls die gleiche Bedeutung. In the context of the present invention, the terms “inner surface (4a) of the first part body (1a)” and “inner surface (4a)” are used synonymously. These terms therefore also have the same meaning. In the context of the present invention, the terms “inner surface (4b) of the second part body (1b)” and “inner surface (4b)” are used synonymously. These terms therefore also have the same meaning.
Schritt b) Step b)
In Schritt b) wird ein Werkzeug (5) bereitgestellt. In einer bevorzugten Ausführungsform umfasst das in Schritt b) bereitgestellte Werkzeug (5) eine erste Seite (6a) und eine zweite (6b), wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei auf der zweiten Seite (6b) der Kanal (7b) angeordnet ist, wobei der Kanal (7b) einen geschlossenen Verlauf aufweist und wobei der Kanal (7b) ein Mittel (11 b) zur Zuführung von heißem Gas umfasst und wobei auf der zweiten Seite (6b) ein Mittel (30b) zur aktiven Druckregelung angeordnet ist. In step b) a tool (5) is provided. In a preferred embodiment, the tool (5) provided in step b) comprises a first side (6a) and a second (6b), with the channel (7a) being arranged on the first side (6a) and with the second side ( 6b) the channel (7b) is arranged, wherein the channel (7b) has a closed course and wherein the channel (7b) comprises a means (11b) for supplying hot gas and wherein on the second side (6b) a means (30b) is arranged for active pressure control.
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem das in Schritt b) bereitgestellte Werkzeug (5) eine erste Seite (6a) und eine zweite Seite (6b) umfasst, wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei auf der zweiten Seite (6b) ein Kanal (7b) mit einem in sich geschlossenen Verlauf angeordnet ist, wobei der Kanal (7b) ein Mittel (11b) zur Zuführung von heißem Gas umfasst und wobei auf der zweiten Seite (6b) ein Mittel (30b) zur aktiven Druckregelung angeordnet ist. Die Figuren 1 und 2 zeigen beispielhaft den Querschnitt des Werkzeugs (5), an dem der erste Schweißkörper (1a) bzw. der erste Teilkörper (1a) und der zweite Teilkörper (1b) positioniert sind. The present invention thus relates to a method in which the tool (5) provided in step b) comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and wherein on the second side (6b) a channel (7b) with a self-contained course is arranged, wherein the channel (7b) comprises a means (11b) for supplying hot gas and wherein on the second side (6b) a means (30b) for active pressure regulation is arranged. Figures 1 and 2 show an example of the cross section of the tool (5) on which the first welding body (1a) or the first part body (1a) and the second part body (1b) are positioned.
Als Mittel (11a) zum Zuführen von heißem Gas in den Kanal (7a) eignen sich alle dem Fachmann bekannten Mittel (11a), die sich zum Zuführen von Gasen eignen, wie beispielsweise Düsen, Bohrungen und/oder Schlitze. Gleiches gilt für das Mittel (11b). Darüber hinaus umfasst das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung. Als Mittel (30a) eignen sich alle dem Fachmann bekannten Mittel (30a), mit denen eine aktive Druckregelung möglich ist. Geeignete Mittel (30a) zur aktiven Druckregelung sind beispielsweise Pumpen, durch die Gas gefördert werden kann. Geeignete Pumpen sind beispielsweise Vakuumpumpen oder Ejektoren oder Kompressoren. Mit Vakuumpumpen oder Ejektoren ist eine Druckerniedrigung möglich, mit Kompressoren ist eine Druckerhöhung möglich. Die vorstehenden Ausführungen zum Mittel (30a) gelten für das Mittel (30b) entsprechend. Suitable means (11a) for supplying hot gas into the channel (7a) are all means (11a) known to the person skilled in the art which are suitable for supplying gases, such as nozzles, bores and / or slots. The same applies to the means (11b). In addition, the tool (5) comprises a means (30a) for active pressure regulation. Suitable means (30a) are all means (30a) known to the person skilled in the art, with which active pressure regulation is possible. Suitable means (30a) for active pressure regulation are, for example, pumps through which gas can be conveyed. Suitable pumps are, for example, vacuum pumps or ejectors or compressors. The pressure can be reduced with vacuum pumps or ejectors, while the pressure can be increased with compressors. The above statements regarding the means (30a) apply accordingly to the means (30b).
In einer bevorzugen Ausführungsform ist das Mittel (30a) in einem Bereich positioniert, der durch den Verlauf des Kanals (7a) umschlossen ist. Bevorzugt ist das Mittel (30a) auf der ersten Seite (6a) des Werkzeugs (5) in einem Bereich positioniert, der durch den Verlauf des Kanals (7a) umschlossen ist. In a preferred embodiment, the means (30a) is positioned in an area which is enclosed by the course of the channel (7a). The means (30a) is preferably positioned on the first side (6a) of the tool (5) in an area which is enclosed by the course of the channel (7a).
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem das Mittel (30a) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7a) umschlossen ist. The subject matter of the present invention is therefore a method in which the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
Das Mittel (30b) ist in einer bevorzugten Ausführungsform in einem Bereich positioniert, der durch den Verlauf des Kanals (7b) umschlossen ist. In einer weiteren bevorzugten Ausführungsform ist das Mittel (30b) auf der zweiten Seite (6b) des Werkzeugs (5) in einem Bereich positioniert, der durch den Kanal (7b) umschlossen ist. In a preferred embodiment, the means (30b) is positioned in an area which is enclosed by the course of the channel (7b). In a further preferred embodiment, the means (30b) is positioned on the second side (6b) of the tool (5) in an area which is enclosed by the channel (7b).
In einer bevorzugten Ausführungsform entspricht der Verlauf des Kanals (7a) im Wesentlichen dem Verlauf des Schweißstegs (2a). Hierunter wird verstanden, dass bei einer Projektion des Verlaufs des Schweißstegs (2a) auf das Werkzeug (5), bevorzugt auf die erste Seite (6a) des Werkzeugs (5), mindestens 80 % der Fläche der Projektion des Schweißstegs (2a) innerhalb des Kanals (7a) liegen. Bevorzugt liegen mindestens 90 % der Fläche der Projektion des Schweißstegs (2a) innerhalb des Verlaufs des Kanals (7a), insbesondere bevorzugt mindestens 95 % und am meisten bevorzugt liegt die Projektion der Schweißnaht (2a) vollständig im Kanal (7a). In a preferred embodiment, the course of the channel (7a) essentially corresponds to the course of the welding web (2a). This means that when the course of the welding web (2a) is projected onto the tool (5), preferably onto the first side (6a) of the tool (5), at least 80% of the area of the projection of the welding web (2a) within the Channel (7a) lie. Preferably at least 90% of the area of the projection of the welding web (2a) lies within the course of the channel (7a), particularly preferably at least 95% and most preferably the projection of the weld seam (2a) lies completely in the channel (7a).
In einer weiteren bevorzugten Ausführungsform weist der Kanal (7a) somit eine Fläche auf, die bevorzugt größer ist als die Fläche des Verlaufs des Schweißstegs (2a) (bezogen auf die Stirnseite des Schweißstegs (2a)). In dieser Ausführungsform ist es möglich, dass der Schweißsteg (2a) in den Kanal (7a) eingeführt werden kann. In a further preferred embodiment, the channel (7a) thus has an area which is preferably larger than the area of the course of the welding web (2a) (based on the end face of the welding web (2a)). In this embodiment it is possible that the welding web (2a) can be inserted into the channel (7a).
Die vorstehenden Ausführungen und Bevorzugungen gelten für den Verlauf des Schweißstegs (2b) sowie den Verlauf des Kanals (7b) entsprechend. In einer besonders bevorzugten Ausführungsform umfasst das Mittel (30a) eine Öffnung im Werkzeug (5), über die eine Vakuumpumpe und/oder ein Kompressor an das Werkzeug (5) angeschlossen werden können. Gleiches gilt für das Mittel (30b). The above statements and preferences apply accordingly to the course of the welding web (2b) and the course of the channel (7b). In a particularly preferred embodiment, the means (30a) comprises an opening in the tool (5), via which a vacuum pump and / or a compressor can be connected to the tool (5). The same applies to the means (30b).
Im Rahmen der vorliegenden Erfindung werden die Begriffe„erste Seite (6a) des Werkzeugs (5)“ und„erste Seite (6a)“ synonym gebraucht und haben daher die gleiche Bedeutung. Gleiches gilt auch für die Begriffe„zweite Seite (6b) des Werkzeugs (5)“ und„zweite Seite (6b)“. Diese Begriffe werden im Rahmen der vorliegenden Erfindung ebenfalls synonym gebraucht und haben daher ebenfalls die gleiche Bedeutung. In the context of the present invention, the terms “first side (6a) of the tool (5)” and “first side (6a)” are used synonymously and therefore have the same meaning. The same also applies to the terms “second side (6b) of the tool (5)” and “second side (6b)”. These terms are also used synonymously in the context of the present invention and therefore also have the same meaning.
Es versteht sich zudem von selbst, dass es sich bei der ersten Seite (6a) und der zweiten Seite (6b) um unterschiedliche Seiten des Werkzeugs (5) handelt. Bevorzugt liegen die erste Seite (6a) und die zweite Seite (6b) an gegenüberliegenden Seiten des Werkzeugs (5). It also goes without saying that the first side (6a) and the second side (6b) are different sides of the tool (5). The first side (6a) and the second side (6b) are preferably located on opposite sides of the tool (5).
Es versteht sich von selbst, dass es sich bei dem Kanal (7a) und dem Kanal (7b) um unterschiedliche Kanäle handelt. Gleiches gilt für das Mittel zur Zuführung von heißem Gas (11a) und dem Mittel zur Zuführung von heißem Gas (11 b). Hierbei handelt es sich auch um unterschiedliche Mittel. Die Begriffe„Mittel zur Zuführung von heißem Gas (11a)“ und„Mittel 11(a)“ werden im Rahmen der vorliegenden Erfindung zudem synonym gebraucht und haben daher die gleiche Bedeutung. Gleiches gilt für die Begriffe„Mittel zur Zuführungen von heißem Gas (11b)“ und„Mittel (11 b)“. Diese Begriffe werden ebenfalls synonym gebraucht und haben im Rahmen der vorliegenden Erfindung die gleiche Bedeutung. It goes without saying that the channel (7a) and the channel (7b) are different channels. The same applies to the means for supplying hot gas (11a) and the means for supplying hot gas (11b). These are also different means. The terms “means for supplying hot gas (11a)” and “means 11 (a)” are also used synonymously in the context of the present invention and therefore have the same meaning. The same applies to the terms "means for supplying hot gas (11b)" and "means (11b)". These terms are also used synonymously and have the same meaning in the context of the present invention.
Es versteht sich darüber hinaus von selbst, dass es sich bei der Kanaleintrittsebene (14a) und der Kanaleintrittsebene (14b) um unterschiedliche Kanaleintrittsebenen handelt. Gleiches gilt für die Mittel zur aktiven Druckregelung (30a) und die Mittel zur aktiven Druckregelung (30b). Hierbei handelt es sich um unterschiedliche Mittel zur aktiven Druckregelung. It also goes without saying that the channel entry level (14a) and the channel entry level (14b) are different channel entry levels. The same applies to the means for active pressure regulation (30a) and the means for active pressure regulation (30b). These are different means for active pressure control.
Darüber hinaus werden im Rahmen der vorliegenden Erfindung die Begriffe„Mittel zur aktiven Druckregelung (30a)“ und„Mittel (30a)“ synonym gebraucht und haben daher die gleiche Bedeutung. Gleiches gilt für die Begriffe„Mittel zur aktiven Druckregelung (30b)“ und„Mittel (30b)“. Diese Begriffe werden ebenfalls im Rahmen der vorliegenden Erfindung synonym gebraucht und haben daher die gleiche Bedeutung. In addition, within the scope of the present invention, the terms “means for active pressure control (30a)” and “means (30a)” are used synonymously and therefore have the same meaning. The same applies to the terms "means for active pressure control (30b)" and "means (30b)". These terms are also used synonymously in the context of the present invention and therefore have the same meaning.
Der Kanal (7a) ist bevorzugt auf der ersten Seite (6a) des Werkzeugs (5) angeordnet. Der Kanal (7a), der auf der ersten Seite (6a) des Werkzeugs (5) angeordnet ist, umfasst zudem bevorzugt ein Mittel (11a) zum Zuführen von heißen Gasen. Der Kanal (7b) ist bevorzugt auf der zweiten Seite (6b) des Werkszeugs (5) angeordnet. Der Kanal (7b), der auf der zweiten Seite (6b) des Werkzeugs (5) angeordnet ist, weist zudem bevorzugt ein Mittel (11b) zur Zuführung von heißem Gas auf. The channel (7a) is preferably arranged on the first side (6a) of the tool (5). The channel (7a) which is arranged on the first side (6a) of the tool (5) also preferably comprises a means (11a) for supplying hot gases. The channel (7b) is preferably arranged on the second side (6b) of the tool (5). The channel (7b), which is arranged on the second side (6b) of the tool (5), also preferably has a means (11b) for supplying hot gas.
Durch die Mittel (11a) und (11 b) wird heißes Gas zugeführt. Die Mittel (11a) und (11b) sind dazu geeignet, die Schweißstege (2a;2b) zu erwärmen, um diese nachfolgend in Schritt e), bevorzugt unter Ausbildung einer Schweißnaht, zu verschweißen. Die Mittel (11a; 11b) zur Zuführung von heißem Gas unterscheiden sich von den Mitteln (30a;30b) zur aktiven Druckregelung. Die Mittel zur aktiven Druckregelung (30a; 30b) sind nicht dazu geeignet, die Schweißstege (2a;2b) aufzuschmelzen. Hot gas is supplied through the means (11a) and (11b). The means (11a) and (11b) are suitable for heating the welding webs (2a; 2b) in order to subsequently weld them in step e), preferably with the formation of a weld seam. The means (11a; 11b) for supplying hot gas differ from the means (30a; 30b) for active pressure regulation. The means for active pressure regulation (30a; 30b) are not suitable for melting the welding webs (2a; 2b).
Schritt c) Step c)
In Schritt c) wird der Schweißsteg (2a) des ersten Teilkörpers (1a) im Bereich des Kanals (7a) des Werkzeugs (5) positioniert. In step c) the welding web (2a) of the first part-body (1a) is positioned in the region of the channel (7a) of the tool (5).
Wie exemplarisch in den Figuren 1 und 2 dargestellt, bildet sich hierdurch zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) aus. Bevorzugt bildet sich der erste Innenraum (20a) zwischen dem ersten Teilkörper (1a) und der ersten Seite (6a) des Werkzeugs (5) aus. In einer bevorzugten Ausführungsform wird in Schritt c) zusätzlich der Schweißsteg (2b) des zweiten Teilkörpers (1b) im Bereich des Kanals (7b) des Werkzeugs (5) positioniert, wobei sich zwischen dem zweiten Teilkörper (1 b) und dem Werkzeug (5) ein zweiter Innenraum (20b) ausbildet. Bevorzugt bildet sich der zweite Innenraum (20b) zwischen der zweiten Seite (6b) des Werkzeugs (5) und dem zweiten Teilkörper (1 b) aus. As shown by way of example in FIGS. 1 and 2, a first interior space (20a) is thereby formed between the first partial body (1a) and the tool (5). The first interior space (20a) is preferably formed between the first partial body (1a) and the first side (6a) of the tool (5). In a preferred embodiment, in step c) the welding web (2b) of the second part body (1b) is additionally positioned in the area of the channel (7b) of the tool (5), whereby between the second part body (1b) and the tool (5 ) forms a second interior space (20b). The second interior space (20b) is preferably formed between the second side (6b) of the tool (5) and the second partial body (1b).
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem Schritt c) zusätzlich das Positionieren des Schweißstegs (2b) des zweiten Teilkörpers (1b) im Bereich des Kanals (7b) des Werkzeugs (5) umfasst, wobei sich zwischen dem zweiten Teilkörper (1 b) und dem Werkzeug (5) ein zweiter Innenraum (20b) ausbildet, und Schritt d) zusätzlich das Zuführen von heißem Gas durch den Kanal (7b), wodurch der Schweißsteg (2b) des zweiten Teilkörpers (1 b) aufgeschmolzen wird, und die aktive Regelung des Drucks im zweiten Innenraum (20b) durch das Mittel (30b) umfasst. The present invention thus relates to a method in which step c) additionally includes the positioning of the welding web (2b) of the second partial body (1b) in the region of the channel (7b) of the tool (5), with the second partial body (1 b) and the tool (5) forms a second interior space (20b), and step d) additionally the supply of hot gas through the channel (7b), whereby the welding web (2b) of the second part-body (1b) is melted, and the active regulation of the pressure in the second interior space (20b) by the means (30b).
In einer bevorzugten Ausführungsform wird der Schweißsteg (2a) in Schritt c) in einem Bereich des Kanals (7a) positioniert, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2a), bezogen auf die Kanaleintrittsebene (14a), einen Abstand (Xa) aufweist, der im Bereich von > 0 bis 3 mm außerhalb des Kanals (7a) oder im Bereich von 0 bis 10 mm innerhalb des Kanals (7a) liegt. Bevorzugt liegt der Abstand (Xa) im Bereich von 0,5 bis 8 mm innerhalb des Kanals. Es versteht sich von selbst, dass der Abstand (Xa) innerhalb des Kanals (7a) immer kleiner ist als die Kanaltiefe des Kanals (7a). Wenn der Abstand (Xa) im Bereich von > 0 bis 3 mm außerhalb des Kanals (7a) liegt, befindet sich der Schweißsteg (2a) außerhalb des Kanalbereichs. In a preferred embodiment, the welding web (2a) is positioned in step c) in a region of the channel (7a), the end face of the welding web (2a) facing the tool (5) being a distance (relative to the channel entry plane (14a)) ( Xa), which lies in the range from> 0 to 3 mm outside the channel (7a) or in the range from 0 to 10 mm inside the channel (7a). The distance (Xa) is preferably in the range from 0.5 to 8 mm within the channel. It goes without saying that the distance (Xa) within the channel (7a) is always smaller than the channel depth of the channel (7a). If the distance (Xa) is in the range from> 0 to 3 mm is outside the channel (7a), the welding web (2a) is outside the channel area.
In einer weiteren bevorzugten Ausführungsform wird der Schweißsteg (2b) in Schritt c) in einem Bereich des Kanals (7b) positioniert, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2b), bezogen auf die Kanaleintrittsebene (14b), einen Abstand (Xb) aufweist, der im Bereich von > 0 bis 3 mm außerhalb des Kanals (7b) oder im Bereich von 0 bis 10 mm innerhalb des Kanals (7b) liegt. Bevorzugt liegt der Abstand (Xb) im Bereich von 0,5 bis 8 mm innerhalb des Kanals (7b). In a further preferred embodiment, the welding web (2b) is positioned in step c) in a region of the channel (7b), the end face of the welding web (2b) facing the tool (5) being a distance from the channel entry plane (14b) (Xb), which lies in the range from> 0 to 3 mm outside the channel (7b) or in the range from 0 to 10 mm inside the channel (7b). The distance (Xb) is preferably in the range from 0.5 to 8 mm within the channel (7b).
Darüber hinaus gelten für die Positionierung des Schweißstegs (2b) in Schritt c) die vorstehend gemachten Ausführungen und Bevorzugungen für die Positionierung des Schweißstegs (2a) entsprechend. In addition, the statements made above and preferences for the positioning of the welding web (2a) apply accordingly to the positioning of the welding web (2b) in step c).
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem der Schweißsteg (2a) in Schritt c) in einem Bereich des Kanals (7a) positioniert wird, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2a) bezogen auf die Kanaleintrittsebene (14a) einen Abstand (Xa) aufweist, der im Bereich vonThe present invention thus relates to a method in which the welding web (2a) is positioned in step c) in an area of the channel (7a), the end face of the welding web (2a) facing the tool (5) in relation to the channel entry plane ( 14a) has a distance (Xa) which is in the range of
> 0 bis 3 mm außerhalb des Kanals (7a) oder im Bereich von 0 bis 10 mm innerhalb des Kanals (7a) liegt. > 0 to 3 mm outside the channel (7a) or in the range from 0 to 10 mm inside the channel (7a).
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem der Schweißstegs (2b) in Schritt c) in einem Bereich des Kanals (7b) positioniert wird, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2b) bezogen auf die Kanaleintrittsebene (14b) einen Abstand (Xb) aufweist, der im Bereich vonThe subject of the present invention is therefore a method in which the welding web (2b) is positioned in step c) in a region of the channel (7b), the end face of the welding web (2b) facing the tool (5) based on the channel entry plane ( 14b) has a distance (Xb) which is in the range of
> 0 bis 3 mm außerhalb des Kanals (7b) oder im Bereich von 0 bis 10 mm innerhalb des Kanals (7b) liegt. > 0 to 3 mm outside the channel (7b) or in the range from 0 to 10 mm inside the channel (7b).
Die bevorzugte Positionierung der Schweißstege (2a, 2b) im Bereich der Kanäle (7a, 7b) ist exemplarisch in den Figuren 6a und 6b dargestellt. In Figur 6a ist die Stirnseite des Schweißstegs (2a) innerhalb des Kanals (7a) positioniert. Der Abstand (Xa) der Stirnseite des Schweißstegs (2a), bezogen auf die Kanaleintrittsebene (14a), ist ebenfalls dargestellt. In Figur 6b befindet sich die Stirnseite des Schweißstegs (2a) außerhalb des Kanals (7a) und somit oberhalb der Kanaleintrittsebene (14a). The preferred positioning of the welding webs (2a, 2b) in the region of the channels (7a, 7b) is shown by way of example in FIGS. 6a and 6b. In Figure 6a, the end face of the welding web (2a) is positioned within the channel (7a). The distance (Xa) of the end face of the welding web (2a), based on the channel entry plane (14a), is also shown. In FIG. 6b, the end face of the welding web (2a) is located outside the channel (7a) and thus above the channel entry plane (14a).
Schritt d) Step d)
In Schritt d) wird ein heißes Gas durch das Mittel (11a) in den Kanal (7a) zugeführt. Dabei erwärmt sich der Schweißsteg (2a) des ersten Teilkörpers (1a) und das in dem Schweißsteg (2a) enthaltene erste thermoplastische Polymer schmilzt auf. „Ein heißes Gas“ bedeutet im Rahmen der vorliegenden Erfindung sowohl genau ein heißes Gas als auch eine Mischung aus zwei oder mehreren heißen Gasen. In step d) a hot gas is fed through the means (11a) into the channel (7a). The welding web (2a) of the first partial body (1a) heats up and the first thermoplastic polymer contained in the welding web (2a) melts. In the context of the present invention, “one hot gas” means both exactly one hot gas and a mixture of two or more hot gases.
Es versteht sich von selbst, dass in Schritt d) auch die Umgebung um den Schweißsteg (2a) erwärmt werden kann. Dies ist insbesondere der Fall, wenn der Schweißsteg (2a) linien-, kanten- oder rippenförmig ausgestaltet ist. It goes without saying that in step d) the surroundings around the welding web (2a) can also be heated. This is particularly the case when the welding web (2a) is designed in the shape of lines, edges or ribs.
In dieser Ausführungsform ist es bevorzugt, wenn der erste Teilkörper (1a) das erste thermoplastische Polymer enthält und dann auch das in der Umgebung um den Schweißsteg (2a) enthaltene erste thermoplastische Polymer aufschmilzt. In this embodiment it is preferred if the first partial body (1a) contains the first thermoplastic polymer and then also melts the first thermoplastic polymer contained in the area around the welding web (2a).
Das heiße Gas kann dem Mittel (11a) zum Zuführen von Gas in den Kanal (7a) nach allen dem Fachmann bekannten Methoden zugeführt werden. The hot gas can be fed to the means (11a) for feeding gas into the channel (7a) by any of the methods known to those skilled in the art.
Als heißes Gas eignen sich alle dem Fachmann bekannten Gase. Derartige Gase sind beispielsweise ausgewählt aus der Gruppe bestehend aus C02, N2 und Luft. All gases known to the person skilled in the art are suitable as the hot gas. Such gases are selected, for example, from the group consisting of C0 2 , N 2 and air.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem das heiße Gas, das in Schritt d) zugeführt wird, ausgewählt ist aus der Gruppe bestehend aus C02, N2 und Luft. The present invention therefore also relates to a method in which the hot gas that is fed in in step d) is selected from the group consisting of C0 2 , N 2 and air.
Unter „Luft“ wird im Rahmen der vorliegenden Erfindung das Gasgemisch der Erdatmosphäre verstanden. Dieses ist dem Fachmann bekannt. In the context of the present invention, “air” is understood to mean the gas mixture of the earth's atmosphere. This is known to the person skilled in the art.
Das heiße Gas kann nach allen dem Fachmann bekannten Methoden erwärmt werden. Beispielsweise kann es durch einen Wärmetauscher erwärmt werden. Darüber hinaus ist es beispielsweise möglich, wenn das heiße Gas C02 ist, dass das heiße Gas in situ hergestellt wird durch Verbrennung von Kohlenwasserstoffen und dadurch heiß ist. The hot gas can be heated by any of the methods known to those skilled in the art. For example, it can be heated by a heat exchanger. In addition, it is possible, for example, when the hot gas is C0 2 , that the hot gas is produced in situ by burning hydrocarbons and is therefore hot.
Das heiße Gas weist beispielsweise eine Temperatur im Bereich von 100 bis 600 °C auf, bevorzugt im Bereich von 250 bis 500 °C und insbesondere bevorzugt im Bereich von 300 bis 500 °C. The hot gas has, for example, a temperature in the range from 100 to 600.degree. C., preferably in the range from 250 to 500.degree. C. and particularly preferably in the range from 300 to 500.degree.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem das heiße Gas, das in Schritt d) zugeführt wird, eine Temperatur im Bereich von 100 bis 600 °C aufweist. The present invention therefore also relates to a process in which the hot gas which is fed in in step d) has a temperature in the range from 100 to 600.degree.
Es versteht sich von selbst, dass die Temperatur des heißen Gases, das in Schritt d) zugeführt wird, sich auf die Temperatur, die das heiße Gas bei Austritt aus dem Mittel (11a) zum Zuführen eines Gases in den Kanal (7a) aufweist, bezieht, also auf die Temperatur, die das heiße Gas im Kanal (7a) aufweist. Der Schweißsteg (2a) des ersten Teilkörpers (1a) kann in Schritt d) auf eine beliebige Temperatur (T1a) erwärmt werden. Üblicherweise liegt die Temperatur (T1a) unterhalb der Zersetzungstemperatur des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers. Vorzugsweise wird der Schweißsteg (2a) des ersten Teilkörpers (1a) in Schritt d) auf eine Temperatur (T1a) erwärmt, die oberhalb der Glasübergangstemperatur (TGi) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein amorphes thermoplastisches Polymer ist, und die oberhalb der Schmelztemperatur (TM1) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer ist. It goes without saying that the temperature of the hot gas which is supplied in step d) relates to the temperature which the hot gas has when it emerges from the means (11a) for supplying a gas into the channel (7a), relates, i.e. to the temperature that the hot gas has in the channel (7a). The welding web (2a) of the first partial body (1a) can be heated to any temperature (T 1a ) in step d). The temperature (T 1a ) is usually below the decomposition temperature of the first thermoplastic polymer contained in the welding web (2a). Preferably, the welding bar (2a) of the first partial body (1a) is heated in step d) to a temperature (T 1a ) which is above the glass transition temperature (T Gi ) of the first thermoplastic polymer contained in the welding bar (2a) when the first thermoplastic polymer is an amorphous thermoplastic polymer, and which is above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding web (2a) when the first thermoplastic polymer is a partially crystalline thermoplastic polymer.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem in Schritt d) sich der Schweißsteg (2a) des ersten Teilkörpers (1a) auf eine Temperatur (T1a) erwärmt, die oberhalb der Glasübergangstemperatur (TGi) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein amorphes thermoplastisches Polymer ist, und die oberhalb der Schmelztemperatur (TM1) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer ist. The present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first partial body ( 1a ) is heated to a temperature (T 1a ) which is above the glass transition temperature (T Gi ) of the welding web ( 2a) contained first thermoplastic polymer is when the first thermoplastic polymer is an amorphous thermoplastic polymer, and which is above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding bar (2a) when the first thermoplastic polymer is a partially crystalline thermoplastic polymer is.
Beispielsweise erwärmt sich der Schweißsteg (2a) des ersten Teilkörpers (1a) auf eine Temperatur (T1a), die im Bereich von 0 bis 300 °C, bevorzugt im Bereich von 30 bis 250 °C und insbesondere bevorzugt im Bereich von 60 bis 200 °C oberhalb der Glasübergangstemperatur (TG1) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein amorphes thermoplastisches Polymer ist, und die im Bereich von 0 bis 300 °C, bevorzugt im Bereich von 30 bis 250 °C und insbesondere bevorzugt im Bereich von 60 bis 200 °C oberhalb der Schmelztemperatur (TM1) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer ist. For example, the welding web (2a) of the first partial body (1a) is heated to a temperature (T 1a ) which is in the range from 0 to 300 ° C, preferably in the range from 30 to 250 ° C and particularly preferably in the range from 60 to 200 ° C above the glass transition temperature (T G1 ) of the first thermoplastic polymer contained in the welding web (2a) if the first thermoplastic polymer is an amorphous thermoplastic polymer, and that in the range from 0 to 300 ° C, preferably in the range from 30 to 250 ° C. and particularly preferably in the range from 60 to 200 ° C. above the melting temperature (T M1 ) of the first thermoplastic polymer contained in the welding web (2a) if the first thermoplastic polymer is a partially crystalline thermoplastic polymer.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem sich in Schritt d) der Schweißsteg (2a) des ersten Teilkörpers (1a) auf eine Temperatur (T1a), die im Bereich von 0 bis 300 °C oberhalb der Glasübergangstemperatur (TGi) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein amorphes thermoplastisches Polymer ist, und die im Bereich von 0 bis 300 °C oberhalb der Schmelztemperatur (TM1) des in dem Schweißsteg (2a) enthaltenen ersten thermoplastischen Polymers liegt, wenn das erste thermoplastische Polymer ein teilkristallines thermoplastisches Polymer ist, erwärmt. Beispielsweise erwärmt sich der Schweißsteg (2a) des ersten Teilkörpers (1a) auf eine Temperatur (T1 a), die im Bereich von 100 bis 500 °C liegt. The present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first part body (1a) is raised to a temperature (T 1a ) which is in the range from 0 to 300 ° C above the glass transition temperature (T Gi ) of the first thermoplastic polymer contained in the welding web (2a) is when the first thermoplastic polymer is an amorphous thermoplastic polymer and is in the range from 0 to 300 ° C above the melting temperature (T M1 ) of the in the welding web (2a) contained first thermoplastic polymer is when the first thermoplastic polymer is a partially crystalline thermoplastic polymer, heated. For example, the welding web (2a) of the first partial body (1a) is heated to a temperature (T 1 a ) which is in the range from 100 to 500 ° C.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem in Schritt d) sich der Schweißsteg (2a) des ersten Teilkörpers (1a) auf eine Temperatur (T1a) erwärmt, die im Bereich von 100 bis 500 °C liegt. The present invention therefore also relates to a method in which, in step d), the welding web (2a) of the first part body ( 1a ) is heated to a temperature (T 1a ) which is in the range from 100 to 500.degree.
In Schritt d) schmilzt das erste thermoplastische Polymer auf oder erweicht. In step d) the first thermoplastic polymer melts or softens.
Im Rahmen der vorliegenden Erfindung wird unter„Aufschmelzen oder Erweichen“ im Zusammenhang mit dem ersten thermoplastischen Polymer ebenso wie im Zusammenhang mit dem zweiten thermoplastischen Polymer verstanden, dass das erste thermoplastische Polymer bzw. das zweite thermoplastische Polymer plastisch verformbar, bevorzugt fließfähig ist. In the context of the present invention, “melting or softening” in connection with the first thermoplastic polymer as well as in connection with the second thermoplastic polymer is understood to mean that the first thermoplastic polymer or the second thermoplastic polymer is plastically deformable, preferably flowable.
In Schritt d) wird der Druck im ersten Innenraum (20a) durch das Mittel (30a) aktiv geregelt. Die aktive Regelung des Druckes kann während der gesamten Dauer des Schritts d) durchgeführt werden. Anders ausgedrückt bedeutet dies, dass die aktive Regelung des Drucks zeitgleich mit der Zuführung von heißem Gas durch den Kanal (7a) durchgeführt wird. In dieser Ausführungsform wird die aktive Druckregelung solange durchgeführt, wie heißes Gas durch den Kanal (7a) zugeführt wird. Diese Ausführungsform ist bevorzugt. In step d) the pressure in the first interior space (20a) is actively regulated by means (30a). The active regulation of the pressure can be carried out for the entire duration of step d). In other words, this means that the active regulation of the pressure is carried out simultaneously with the supply of hot gas through the channel (7a). In this embodiment, the active pressure regulation is carried out as long as hot gas is supplied through the channel (7a). This embodiment is preferred.
Darüber hinaus ist es auch möglich, die aktive Regelung des Drucks nicht während der gesamten Zeitdauer der Zuführung von heißem Gas durch den Kanal (7a) durchzuführen. So ist es beispielsweise möglich, zunächst mit der Zuführung von heißem Gas durch den Kanal (7a) zu beginnen und die aktive Druckregelung zeitversetzt, das heißt, bezogen auf den Beginn der Zuführung von heißem Gas zu einem späteren Zeitpunkt, zu beginnen. In addition, it is also possible not to carry out the active regulation of the pressure during the entire duration of the supply of hot gas through the channel (7a). For example, it is possible to begin with the supply of hot gas through the channel (7a) and to start the active pressure regulation with a time delay, i.e., based on the start of the supply of hot gas at a later point in time.
In einer bevorzugten Ausführungsform wird durch das Mittel (30a) und/oder das Mittel (30b) Gas aus dem ersten Innenraum (20a) und/oder dem zweiten Innenraum (20b) abgeführt. Bevorzugt erfolgt die Abführung des Gases aktiv durch Abpumpen oder Absaugen. Bevorzugt erfolgt dies während Schritt d). In a preferred embodiment, gas is removed from the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b). The gas is preferably discharged actively by pumping out or sucking off. This is preferably done during step d).
In einer weiteren bevorzugten Ausführungsform wird durch das Mittel (30a) und/oder das Mittel (30b) Gas dem ersten Innenraum (20a) und/oder dem zweiten Innenraum (20b) zugeführt. Bevorzugt erfolgt die Zuführung aktiv durch Einpressen oder Einpumpen. Bevorzugt geschieht dies während Verfahrensschritt d). In a further preferred embodiment, gas is supplied to the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b). The supply is preferably carried out actively by pressing in or pumping in. This is preferably done during process step d).
Während Verfahrensschritt d) wird durch den Kanal (7a) heißes Gas zugeführt. Ohne die erfindungsgemäße aktive Druckregelung entsteht hierdurch in dem ersten Innenraum (20a) ein Innendruck (pl), der höher liegt als der Außendruck (pA). Durch den Umstand, dass der Innendruck (pl) größer als der Außendruck (pA) ist, strömt ohne aktive Druckregelung während Verfahrensschritt d) an der dem ersten Innenraum (20a) abgewandten Seite des Schweißstegs (2a) mehr heißes Gas vorbei als an der dem ersten Innenraum (20a) zugewandten Seite des Schweißstegs (2a). Hierdurch wird die dem ersten Innenraum (20a) abgewandte Seite des Schweißstegs (2a) stärker erwärmt als die dem ersten Innenraum (20a) zugewandte Seite des Schweißstegs (2a). Entsprechendes gilt auch für die Erwärmung des zweiten Schweißstegs (2b). During process step d), hot gas is supplied through the channel (7a). Without the active pressure regulation according to the invention, this occurs in the first Interior (20a) an internal pressure (pl) which is higher than the external pressure (pA). Due to the fact that the internal pressure (pl) is greater than the external pressure (pA), without active pressure regulation during process step d), more hot gas flows past the side of the welding web (2a) facing away from the first interior space (20a) than the one first interior space (20a) facing side of the welding web (2a). As a result, the side of the welding web (2a) facing away from the first interior space (20a) is heated to a greater extent than the side of the welding web (2a) facing the first interior space (20a). The same also applies to the heating of the second welding web (2b).
Ohne die erfindungsgemäße Druckregelung entstehen durch den unterschiedlichen Grad des Aufschmelzens in Verfahrensschritt e) beim Inkontaktbringen der Schweißstege (2a), (2b) unsymmetrische Schweißnähte. Für den Fall, dass in Verfahrensschritt d) der Innendruck (pl) im ersten Innenraum (20a) größer ist als der Außendruck (pA), werden unsymmetrische Schweißnähte erhalten. Durch den höheren Innendruck (pl) in Verfahrensschritt d) wird eine Schweißnaht erhalten, die, bezogen auf den ersten Innenraum (20a), nach außen gewölbt ist. Without the pressure regulation according to the invention, the different degrees of melting in method step e) when the welding webs (2a), (2b) are brought into contact result in asymmetrical weld seams. In the event that in method step d) the internal pressure (pl) in the first interior space (20a) is greater than the external pressure (pA), asymmetrical weld seams are obtained. As a result of the higher internal pressure (p1) in method step d), a weld seam is obtained which, in relation to the first interior space (20a), is curved outward.
Durch die aktive Druckregelung durch das Mittel (30a) ist es erfindungsgemäß möglich und bevorzugt, Verfahrensschritt d) so durchzuführen, dass der Unterschied zwischen Innendruck (pl) und Außendruck (pA) im ersten Innenraum (30a) im Wesentlichen gleich ist. Bevorzugt beträgt der Druckunterschied von Innendruck (pl) zu Außendruck (pA) maximal 50 %, bevorzugt maximal 30 %, mehr bevorzugt maximal 10 %, insbesondere bevorzugt maximal 5 %. Hierdurch werden symmetrische Schweißnähte erhalten, wie sie exemplarisch in den Figuren 7 und 8 dargestellt sind. The active pressure regulation by means (30a) makes it possible and preferred according to the invention to carry out method step d) in such a way that the difference between internal pressure (pl) and external pressure (pA) in the first interior space (30a) is essentially the same. The pressure difference between internal pressure (pi) and external pressure (pA) is preferably a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5%. In this way, symmetrical weld seams are obtained, as shown by way of example in FIGS. 7 and 8.
In einer Ausführungsform liegt der Innendruck (pl) somit um maximal 50 %, bevorzugt maximal 30 %, mehr bevorzugt maximal 10 %, insbesondere bevorzugt maximal 5 % oberhalb des Außendrucks (pA). In one embodiment, the internal pressure (pi) is thus a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5% above the external pressure (pA).
In einer weiteren bevorzugten Ausführungsform liegt der Innendruck (pl) maximal um maximal 50 %, bevorzugt maximal 30 %, mehr bevorzugt maximal 10 %, insbesondere bevorzugt maximal 5 % unterhalb des Außendrucks (pA). In a further preferred embodiment, the internal pressure (pi) is a maximum of 50%, preferably a maximum of 30%, more preferably a maximum of 10%, particularly preferably a maximum of 5% below the external pressure (pA).
Durch die aktive Druckregelung ist es somit erfindungsgemäß möglich, die Symmetrie der Schweißnaht aktiv zu beeinflussen. The active pressure regulation therefore makes it possible according to the invention to actively influence the symmetry of the weld seam.
In einer bevorzugten Ausführungsform wird die aktive Druckregelung so durchgeführt, dass eine symmetrische Schweißnaht erhalten wird. In a preferred embodiment, the active pressure regulation is carried out in such a way that a symmetrical weld seam is obtained.
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem durch das Mittel (30a) und/oder das Mittel (30b) Gas aus dem ersten Innenraum (20a) und/ oder dem zweiten Innenraum (20b) abgeführt wird. In einer weiteren Ausführungsform ist es möglich, durch eine aktive Erhöhung des Innendrucks (pl) in Bezug auf den Außendruck (pA) die Symmetrie der Schweißnaht so zu steuern, dass die Schweißnaht einen Wulst auf der dem ersten Innenraum (20a) abgewandten Seite aufweist. Hierzu wird der Innendruck (pl) in Verfahrensschritt d) bevorzugt so geregelt, dass er mindestens 10 %, bevorzugt mindestens 30 % und insbesondere bevorzugt mindestens 50 % oberhalb des Außendrucks liegt. The present invention thus relates to a method in which gas is removed from the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b). In a further embodiment, it is possible to control the symmetry of the weld seam by actively increasing the internal pressure (pl) in relation to the external pressure (pA) so that the weld seam has a bead on the side facing away from the first interior space (20a). For this purpose, the internal pressure (p1) in process step d) is preferably regulated in such a way that it is at least 10%, preferably at least 30% and particularly preferably at least 50% above the external pressure.
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem durch das Mittel (30a) und/oder das Mittel (30b) Gas dem ersten Innenraum (20a) und/ oder dem zweiten Innenraum (20b) zugeführt wird. The present invention thus relates to a method in which gas is supplied to the first interior space (20a) and / or the second interior space (20b) through the means (30a) and / or the means (30b).
In einer weiteren Ausführungsform wird die Symmetrie der Schweißnaht dahingehend gesteuert, dass sie einen Wulst auf der dem ersten Innenraum (20a) zugewandten Seite aufweist. Hierzu wird der Innendruck (pl) während Verfahrensschritt d) so geregelt, dass er mindestens 10 %, bevorzugt mindestens 30 % und besonders bevorzugt mindestens 50 % unterhalb des Außendrucks (pA) liegt. In a further embodiment, the symmetry of the weld seam is controlled in such a way that it has a bead on the side facing the first interior space (20a). For this purpose, the internal pressure (pi) is regulated during process step d) in such a way that it is at least 10%, preferably at least 30% and particularly preferably at least 50% below the external pressure (pA).
Für die erfindungsgemäß bevorzugte Ausführungsform, bei der in Schritt d) zusätzlich der Schweißsteg (2b) des zweiten Teilkörpers (1 b) aufgeschmolzen wird, wobei der Druck des zweiten Innenraums (20b) aktiv durch das Mittel (30b) geregelt wird, gelten die vorstehend gemachten Ausführungen und Bevorzugungen im Hinblick auf das Aufschmelzen des Schweißstegs (2a) und die aktive Regelung des Drucks im ersten Innenraum (20a) durch das Mittel (30a) entsprechend. For the embodiment preferred according to the invention, in which the welding web (2b) of the second part-body (1b) is additionally melted in step d), the pressure of the second interior space (20b) being actively regulated by the means (30b), the above apply made statements and preferences with regard to the melting of the welding web (2a) and the active regulation of the pressure in the first interior space (20a) by the means (30a) accordingly.
Schritt e) Steps)
In Schritt e) wird der aufgeschmolzene Schweißsteg (2a) des ersten Teilkörpers (1a) mit dem Schweißsteg (2b) des zweiten Teilkörpers (1 b) in Kontakt gebracht, wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Schweißstegs (2a) entspricht. In einer bevorzugten Ausführungsform ist der Verlauf des Schweißstegs (2b) spiegelbildlich zu dem Verlauf des Schweißstegs (2a). In step e) the melted welding web (2a) of the first partial body (1a) is brought into contact with the welding web (2b) of the second partial body (1b), the course of the welding web (2b) essentially following the course of the welding web (2a ) corresponds. In a preferred embodiment, the course of the welding web (2b) is a mirror image of the course of the welding web (2a).
Unter„Inkontaktbringen“ wird vorliegend verstanden, dass der erwärmte Schweißsteg (2a) des ersten Teilkörpers (1a) den erwärmten Schweißsteg (2b) des zweiten Teilkörpers (1 b) berührt. “Bringing into contact” is understood here to mean that the heated welding web (2a) of the first part body (1a) touches the heated welding web (2b) of the second part body (1b).
Das Inkontaktbringen des erwärmten Schweißstegs (2a) des ersten Teilkörpers (1a) mit dem erwärmten Schweißsteg (2b) des zweiten Teilkörpers (1b) kann unter Druck erfolgen, sodass der erwärmte Schweißsteg (2a) des ersten Teilkörpers (1a) und der erwärmte Schweißsteg (2b) des zweiten Teilkörpers (1b) gegeneinander gepresst werden. Verfahren hierzu sind dem Fachmann bekannt. Beispielsweise liegt der Druck beim Inkontaktbringen des erwärmten Schweißstegs (2a) des ersten Teilkörpers (1a) mit dem Schweißsteg (2b) des zweiten Teilkörpers (1b) im Bereich von 0,1 bis 10 MPa, bevorzugt im Bereich von 0,5 bis 6 MPa. The heated welding web (2a) of the first partial body (1a) can be brought into contact with the heated welding web (2b) of the second partial body (1b) so that the heated welding web (2a) of the first partial body (1a) and the heated welding web ( 2b) of the second part-body (1b) are pressed against one another. Processes for this are known to the person skilled in the art. For example, the pressure when the heated welding web (2a) of the first partial body (1a) is brought into contact with the welding web (2b) of the second partial body (1b) is in the range from 0.1 to 10 MPa, preferably in the range from 0.5 to 6 MPa .
Durch das Inkontaktbringen des erwärmten Schweißstegs (2a) mit dem erwärmten Schweißsteg (2b) verbinden sich die in den Schweißstegen (2a, 2b) enthaltenen thermoplastischen Polymere. Nach dem Inkontaktbringen werden die erwärmten Schweißstege (2a, 2b) abgekühlt, wodurch die Schweißverbindung entsteht. Die Begriffe„erwärmter Schweißsteg (2a, 2b)“ und„aufgeschmolzener Schweißsteg (2a, 2b)“ bzw.„erweichter Schweißsteg (2a, 2b)“ werden vorliegend synonym verwendet. By bringing the heated welding web (2a) into contact with the heated welding web (2b), the thermoplastic polymers contained in the welding webs (2a, 2b) bond. After being brought into contact, the heated welding webs (2a, 2b) are cooled, whereby the welded joint is created. The terms "heated weld web (2a, 2b)" and "melted weld web (2a, 2b)" or "softened weld web (2a, 2b)" are used synonymously here.
Das Abkühlen des erwärmten Schweißstegs (2a) des ersten Teilkörpers (1a) und des erwärmten Schweißstegs (2b) des zweiten Teilkörpers (1b) in Schritt e) kann nach allen dem Fachmann bekannten Methoden erfolgen. Beispielsweise kann das Abkühlen an Luft erfolgen. The heated welding web (2a) of the first partial body (1a) and the heated welding web (2b) of the second partial body (1b) in step e) can be cooled using any of the methods known to those skilled in the art. For example, the cooling can take place in air.
In Schritt e) bildet sich eine Schweißnaht zwischen dem ersten Teilkörper (1a) und dem zweiten Teilkörper (1 b) aus. Die Schweißnaht befindet sich in dem Bereich, in dem ursprünglich der Schweißsteg (2a) des ersten Teilkörpers (1a) und der Schweißsteg (2b) des zweiten Teilkörpers (1 b) waren. In step e) a weld seam is formed between the first partial body (1a) and the second partial body (1b). The weld seam is located in the area in which the welding web (2a) of the first part body (1a) and the welding web (2b) of the second part body (1b) were originally.
Eine Schweißnaht ist dem Fachmann als solche bekannt. A weld seam is known as such to the person skilled in the art.
Die Dicke der Schweißnaht zwischen dem ersten Teilkörper (1a) und dem zweiten Teilkörper (1b) liegt beispielsweise im Bereich von 20 bis 1000 pm, bevorzugt im Bereich von 30 bis 400 pm und am meisten bevorzugt im Bereich von 30 bis 300 pm, bestimmt mittels Mikroskopieaufnahmen. The thickness of the weld seam between the first partial body (1a) and the second partial body (1b) is, for example, in the range from 20 to 1000 μm, preferably in the range from 30 to 400 μm and most preferably in the range from 30 to 300 μm, determined by Microscopic recordings.
Gegenstand der vorliegenden Erfindung ist daher auch ein Verfahren, bei dem die in Schritt e) ausgebildete Schweißnaht zwischen dem ersten Teilkörper (1a) und dem zweiten Teilkörper (1 b) eine Dicke im Bereich von 20 bis 1000 pm aufweist. The present invention therefore also relates to a method in which the weld seam formed in step e) between the first partial body (1a) and the second partial body (1b) has a thickness in the range from 20 to 1000 μm.
In Schritt e) wird also der Formkörper, der einen Hohlraum umschließt, erhalten. Dieser Formkörper zeichnet sich durch eine besonders homogene Schweißnaht und gute mechanische Eigenschaften aus. Der Hohlraum wird durch den ersten Innenraum (20a) und den zweiten Innenraum (20b) gebildet. In step e) the shaped body which encloses a cavity is thus obtained. This shaped body is characterized by a particularly homogeneous weld seam and good mechanical properties. The cavity is formed by the first interior space (20a) and the second interior space (20b).
Gegenstand der vorliegenden Erfindung ist somit ein Formkörper, der einen Hohlraum umschließt, erhältlich nach dem erfindungsgemäßen Verfahren. The present invention thus provides a molded body which encloses a cavity, obtainable by the process according to the invention.
Werkzeug (5) Gegenstand der vorliegenden Erfindung ist auch das Werkzeug (5), das in Verfahrensschritt b) bereitgestellt wird. Für das Werkzeug (5) gelten die vorstehend gemachten Ausführungen und Bevorzugungen im Hinblick auf das Verfahren entsprechend. Tool (5) The present invention also relates to the tool (5) which is provided in process step b). The statements made above and preferences with regard to the method apply accordingly to the tool (5).
Erfindungsgemäß bevorzugt ist ein Werkzeug (5) zum Verschweißen von zwei Teilkörpern (1a, 1 b), das einen Kanal (7a) mit einem in sich geschlossenen Verlauf umfasst, wobei der Kanal (7a) Mittel (11a) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7a) ein Schweißsteg (2a) des ersten Teilkörpers (1a) positioniert werden kann, wobei der Verlauf des Schweißstegs (2a) im Wesentlichen dem Verlauf des Kanals (7a) entspricht, wobei sich zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung umfasst. According to the invention, a tool (5) for welding two sub-bodies (1a, 1b) is preferred, which tool comprises a channel (7a) with a self-contained course, the channel (7a) comprising means (11a) for supplying hot gas and wherein in the region of the channel (7a) a welding bar (2a) of the first part body (1a) can be positioned, the course of the welding bar (2a) essentially corresponding to the course of the channel (7a), with (1a) and the tool (5) can form a first interior space (20a) and wherein the tool (5) comprises a means (30a) for active pressure regulation.
Gegenstand der vorliegenden Erfindung ist somit ein Werkzeug (5) zum Verschweißen von zwei Teilkörpern (1a, 1 b), das einen Kanal (7a) mit einem in sich geschlossenen Verlauf umfasst, wobei der Kanal (7a) Mittel (11a) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7a) ein Schweißsteg (2a) des ersten Teilkörpers (1a) positioniert werden kann, wobei der Verlauf des Schweißstegs (2a) im Wesentlichen dem Verlauf des Kanals (7a) entspricht, wobei sich zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung umfasst. The present invention thus relates to a tool (5) for welding two partial bodies (1a, 1b), which comprises a channel (7a) with a self-contained course, the channel (7a) having means (11a) for supplying comprises hot gas and wherein a welding web (2a) of the first part-body (1a) can be positioned in the region of the channel (7a), the course of the welding web (2a) essentially corresponding to the course of the channel (7a), with between the first partial body (1a) and the tool (5) can form a first interior space (20a) and wherein the tool (5) comprises a means (30a) for active pressure regulation.
In einer besonders bevorzugten Ausführungsform ist das Mittel (30a) zur aktiven Regelung des Drucks in einem Bereich positioniert, der durch den Verlauf des Kanals (7a) umschlossen ist. In a particularly preferred embodiment, the means (30a) for actively regulating the pressure is positioned in an area which is enclosed by the course of the channel (7a).
Gegenstand der vorliegenden Erfindung ist somit ein Werkzeug (5), bei dem das Mittel (30a) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7a) umschlossen ist. The present invention thus provides a tool (5) in which the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
Besonders bevorzugt ist ein Werkzeug (5), das eine erste Seite (6a) und eine zweite Seite (6b) umfasst, wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei das Werkzeug (5) einen Kanal (7b) mit einem in sich geschlossenen Verlauf umfasst, wobei der Kanal (7b) Mittel (11 b) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7b) ein Schweißsteg (2b) des zweiten Teilkörpers (1 b) positioniert werden kann, wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Kanals (7b) entspricht, wobei sich zwischen dem zweiten Teilkörper (1b) und dem Werkzeug (5) ein zweiter Innenraum (20b) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30b) zur aktiven Druckregelung umfasst und wobei der Kanal (7b) auf der zweiten Seite (6b) des Werkzeugs (5) angeordnet ist. Gegenstand der vorliegenden Erfindung ist somit ein Werkzeug (5), das eine erste Seite (6a) und eine zweite Seite (6b) umfasst, wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei das Werkzeug (5) einen Kanal (7b) mit einem in sich geschlossenen Verlauf umfasst, wobei der Kanal (7b) Mittel (11 b) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7b) ein Schweißsteg (2b) des zweiten Teilkörpers (1 b) positioniert werden kann, wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Kanals (7b) entspricht, wobei sich zwischen dem zweiten Teilkörper (1b) und dem Werkzeug (5) ein zweiter Innenraum (20b) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30b) zur aktiven Druckregelung umfasst und wobei der Kanal (7b) auf der zweiten Seite (6b) des Werkzeugs (5) angeordnet ist. Particularly preferred is a tool (5) which comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and the tool (5) having a channel ( 7b) with a self-contained course, wherein the channel (7b) comprises means (11b) for the supply of hot gas and wherein a welding web (2b) of the second part-body (1b) is positioned in the region of the channel (7b) can be, the course of the welding web (2b) essentially corresponds to the course of the channel (7b), wherein a second interior space (20b) can form between the second part body (1b) and the tool (5) and the tool ( 5) comprises a means (30b) for active pressure regulation and wherein the channel (7b) is arranged on the second side (6b) of the tool (5). The present invention thus provides a tool (5) which comprises a first side (6a) and a second side (6b), the channel (7a) being arranged on the first side (6a) and the tool (5) comprises a channel (7b) with a self-contained course, wherein the channel (7b) comprises means (11b) for supplying hot gas and wherein in the region of the channel (7b) a welding web (2b) of the second part body (1 b) can be positioned, the course of the welding web (2b) essentially corresponding to the course of the channel (7b), wherein a second interior space (20b) can be formed between the second partial body (1b) and the tool (5) and wherein the tool (5) comprises a means (30b) for active pressure regulation and wherein the channel (7b) is arranged on the second side (6b) of the tool (5).
Besonders bevorzugt ist ein Werkzeug (5), bei dem das Mittel (30b) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7b) umschlossen ist. A tool (5) is particularly preferred in which the means (30b) is positioned in an area which is enclosed by the course of the channel (7b).
Gegenstand der vorliegenden Erfindung ist somit ein Werkzeug (5), bei dem das Mittel (30b) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7b) umschlossen ist. The present invention thus provides a tool (5) in which the means (30b) is positioned in an area which is enclosed by the course of the channel (7b).
Gegenstand der vorliegenden Erfindung ist somit ein Verfahren, bei dem das Mittel (30a) im ersten Teilkörper (1a) positioniert ist und/oder das Mittel (30b) im zweiten Teilkörper (1 b) positioniert ist. The present invention thus relates to a method in which the means (30a) is positioned in the first part body (1a) and / or the means (30b) is positioned in the second part body (1b).
Bezugszeichenliste List of reference symbols
1a erster Teilkörper 1a first part body
1b zweiter Teilkörper 1b second part of the body
2a Schweißsteg des ersten Teilkörpers 1a 2a welding web of the first part body 1a
2b Schweißsteg des zweiten Teilkörpers 1 b 3a Außenfläche des ersten Teilkörpers 1a 3b Außenfläche des zweiten Teilkörpers 1 b 4a Innenfläche des ersten Teilkörpers 1a 4b Innenfläche des zweiten Teilkörpers 1b2b welding bar of the second part body 1 b 3a outer surface of the first part body 1a 3b outer surface of the second part body 1 b 4a inner surface of the first part body 1a 4b inner surface of the second part body 1b
5 Werkzeug 5 tool
6a erste Seite des Werkzeugs 5 6a first side of the tool 5
6b zweite Seite des Werkzeugs 5 6b second side of the tool 5
7a Kanal 7a channel
7b Kanal 7b channel
11a Mittel zur Zuführung von heißem Gas 11 b Mittel zur Zuführung von heißem Gas 14a Kanaleintrittsebene 11a means for supplying hot gas 11b means for supplying hot gas 14a channel inlet level
14b Kanaleintrittsebene 14b canal entry level
20a erster Innenraum 20a first interior
20b zweiter Innenraum 20b second interior space
30a Mittel zur aktiven Druckregelung 30b Mittel zur aktiven Druckregelung 30a means for active pressure regulation 30b means for active pressure regulation
Xa Abstand Xa distance

Claims

Ansprüche Expectations
1. Verfahren zur Herstellung eines Formkörpers, der einen Hohlraum umschließt, durch Verschweißen von zwei Teilkörpern (1a, 1b), umfassend die Schritte a), b), c), d) und e): a) Bereitstellen des ersten Teilkörpers (1a), wobei der erste Teilkörper (1a) einen Schweißsteg (2a) mit einem in sich geschlossenen Verlauf umfasst, b) Bereitstellen eines Werkzeuges (5), das einen Kanal (7a) mit einem in sich geschlossenen Verlauf umfasst, wobei der Verlauf des Kanals (7a) im Wesentlichen dem Verlauf des Schweißstegs (2a) entspricht, wobei der Kanal (7a) Mittel (11a) zur Zuführung von heißem Gas umfasst und wobei das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung umfasst, c) Positionieren des Schweißstegs (2a) des ersten Teilkörpers (1a) im Bereich des Kanals (7a) des Werkzeugs (5), wobei sich zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) ausbildet, d) Zuführen von heißem Gas durch den Kanal (7a), wodurch der Schweiß steg (2a) des ersten Teilkörpers (1a) aufgeschmolzen wird, und aktive Regelung des Drucks im ersten Innenraum (20a) durch das Mittel (30a) und e) Inkontaktbringen des aufgeschmolzenen Schweißstegs (2a) des ersten Teilkörpers mit einem Schweißsteg (2b) des zweiten Teilkörpers (1b), wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Schweißstegs (2a) entspricht. 1. A method for producing a shaped body which encloses a cavity by welding two part bodies (1a, 1b), comprising the steps a), b), c), d) and e): a) Providing the first part body (1a ), wherein the first part body (1a) comprises a welding web (2a) with a self-contained course, b) providing a tool (5) which comprises a channel (7a) with a self-contained course, the course of the channel (7a) essentially corresponds to the course of the welding web (2a), the channel (7a) comprising means (11a) for supplying hot gas and wherein the tool (5) comprises means (30a) for active pressure regulation, c) positioning of the welding bar (2a) of the first part body (1a) in the region of the channel (7a) of the tool (5), a first interior space (20a) being formed between the first part body (1a) and the tool (5), d) feeding of hot gas through the channel (7a), whereby the welding web (2a) of the first part of the body (1a) is melted, and active regulation of the pressure in the first interior space (20a) by means (30a) and e) bringing the melted welding bar (2a) of the first part body into contact with a welding bar (2b) of the second part body (1b), wherein the course of the welding web (2b) essentially corresponds to the course of the welding web (2a).
2. Verfahren gemäß Anspruch 1 , dadurch gekennzeichnet, dass das Mittel (30a) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7a) umschlossen ist. 2. The method according to claim 1, characterized in that the means (30a) is positioned in an area which is enclosed by the course of the channel (7a).
3. Verfahren gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass Schritt a) zusätzlich die Bereitstellung des zweiten Teilkörpers (1 b) umfasst, wobei der zweite Teilkörper (1b) einen Schweißsteg (2b) mit einem in sich geschlossenen Verlauf umfasst. 3. The method according to claim 1 or 2, characterized in that step a) additionally comprises the provision of the second partial body (1b), the second partial body (1b) comprising a welding web (2b) with a self-contained course.
4. Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das in Schritt b) bereitgestellte Werkzeug (5) eine erste Seite (6a) und eine zweite Seite (6b) umfasst, wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei auf der zweiten Seite (6b) ein Kanal (7b) mit einem in sich geschlossenen Verlauf angeordnet ist, wobei der Kanal (7b) ein Mittel (11b) zur Zuführung von heißem Gas umfasst und wobei auf der zweiten Seite (6b) ein Mittel (30b) zur aktiven Druckregelung angeordnet ist. 4. The method according to any one of claims 1 to 3, characterized in that the tool (5) provided in step b) has a first side (6a) and a second side (6b), wherein the channel (7a) is arranged on the first side (6a) and wherein a channel (7b) with a self-contained course is arranged on the second side (6b), the channel (7b ) comprises means (11b) for supplying hot gas and wherein a means (30b) for active pressure regulation is arranged on the second side (6b).
5. Verfahren gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass Schritt c) zusätzlich das Positionieren des Schweißstegs (2b) des zweiten Teilkörpers (1 b) im Bereich des Kanals (7b) des Werkzeugs (5) umfasst, wobei sich zwischen dem zweiten Teilkörper (1 b) und dem Werkzeug (5) ein zweiter5. The method according to any one of claims 1 to 4, characterized in that step c) additionally comprises the positioning of the welding web (2b) of the second part body (1b) in the region of the channel (7b) of the tool (5), wherein there is between the second part body (1 b) and the tool (5) a second
Innenraum (20b) ausbildet, und Schritt d) zusätzlich das Zuführen von heißem Gas durch den Kanal (7b), wodurch der Schweißsteg (2b) des zweiten Teilkörpers (1 b) aufgeschmolzen wird, und die aktive Regelung des Drucks im zweiten Innenraum (20b) durch das Mittel (30b) umfasst. Inner space (20b) forms, and step d) additionally the supply of hot gas through the channel (7b), whereby the welding web (2b) of the second part body (1b) is melted, and the active regulation of the pressure in the second inner space (20b) ) by the means (30b).
6. Verfahren gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass durch das Mittel (30a) und/oder das Mittel (30b) Gas aus dem ersten Innenraum (20a) und/ oder dem zweiten Innenraum (20b) abgeführt wird. 6. The method according to any one of claims 1 to 5, characterized in that the means (30a) and / or the means (30b) gas is removed from the first interior space (20a) and / or the second interior space (20b).
7. Verfahren gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass durch das Mittel (30a) und/oder das Mittel (30b) Gas dem ersten Innenraum (20a) und/ oder dem zweiten Innenraum (20b) zugeführt wird. 7. The method according to any one of claims 1 to 5, characterized in that the means (30a) and / or the means (30b) gas is fed to the first interior space (20a) and / or the second interior space (20b).
8. Verfahren gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Schweißsteg (2a) in Schritt c) in einem Bereich des Kanals (7a) positioniert wird, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2a) bezogen auf die Kanaleintrittsebene (14a) einen Abstand (Xa) aufweist, der im Bereich von > 0 bis 3 mm außerhalb des Kanals (7a) oder im Bereich von 0 bis 10 mm innerhalb des Kanals (7a) liegt. 8. The method according to any one of claims 1 to 7, characterized in that the welding web (2a) is positioned in step c) in a region of the channel (7a), the end face of the welding web (2a) facing the tool (5) being referred to on the channel entry plane (14a) has a distance (Xa) which is in the range from> 0 to 3 mm outside the channel (7a) or in the range from 0 to 10 mm inside the channel (7a).
9. Verfahren gemäß einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Schweißstegs (2b) in Schritt c) in einem Bereich des Kanals (7b) positioniert wird, wobei die dem Werkzeug (5) zugewandte Stirnseite des Schweißstegs (2b) bezogen auf die Kanaleintrittsebene (14b) einen Abstand (Xb) aufweist, der im Bereich von > 0 bis 3 mm außerhalb des Kanals (7b) oder im Bereich von 0 bis9. The method according to any one of claims 1 to 8, characterized in that the welding web (2b) is positioned in step c) in a region of the channel (7b), the end face of the welding web (2b) facing the tool (5) being referred to on the channel entry plane (14b) has a distance (Xb) which is in the range from> 0 to 3 mm outside the channel (7b) or in the range from 0 to
10 mm innerhalb des Kanals (7b) liegt. 10 mm within the channel (7b).
10. Formkörper, der einen Hohlraum umschließt, erhältlich nach einem Verfahren gemäß einem der Ansprüche 1 bis 9. 10. Shaped body which encloses a cavity, obtainable by a method according to any one of claims 1 to 9.
11. Werkzeug (5) zum Verschweißen von zwei Teilkörpern (1a, 1 b), das einen11. Tool (5) for welding two part bodies (1a, 1b), one
Kanal (7a) mit einem in sich geschlossenen Verlauf umfasst, wobei derChannel (7a) with a self-contained course, wherein the
Kanal (7a) Mittel (11a) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7a) ein Schweißsteg (2a) des ersten Teilkörpers (1a) positioniert werden kann, wobei der Verlauf des Schweißstegs (2a) imChannel (7a) comprises means (11a) for supplying hot gas and wherein a welding web (2a) of the first part-body (1a) can be positioned in the region of the channel (7a), the course of the welding web (2a) in the
Wesentlichen dem Verlauf des Kanals (7a) entspricht, wobei sich zwischen dem ersten Teilkörper (1a) und dem Werkzeug (5) ein erster Innenraum (20a) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30a) zur aktiven Druckregelung umfasst. Essentially corresponds to the course of the channel (7a), a first interior space (20a) being able to form between the first part-body (1a) and the tool (5) and the tool (5) comprising a means (30a) for active pressure regulation.
12. Werkzeug (5) gemäß Anspruch 11 , dadurch gekennzeichnet, dass das12. Tool (5) according to claim 11, characterized in that the
Mittel (30a) in einem Bereich positioniert ist, der durch den Verlauf desMeans (30a) is positioned in an area defined by the course of the
Kanals (7a) umschlossen ist. Channel (7a) is enclosed.
13. Werkzeug (5) gemäß Anspruch 11 oder 12, dadurch gekennzeichnet, dass es eine erste Seite (6a) und eine zweite Seite (6b) umfasst, wobei auf der ersten Seite (6a) der Kanal (7a) angeordnet ist und wobei das Werkzeug (5) einen Kanal (7b) mit einem in sich geschlossenen Verlauf umfasst, wobei der13. Tool (5) according to claim 11 or 12, characterized in that it comprises a first side (6a) and a second side (6b), wherein the channel (7a) is arranged on the first side (6a) and wherein the Tool (5) comprises a channel (7b) with a self-contained course, wherein the
Kanal (7b) Mittel (11b) zur Zuführung von heißem Gas umfasst und wobei in dem Bereich des Kanals (7b) ein Schweißsteg (2b) des zweiten Teilkörpers (1b) positioniert werden kann, wobei der Verlauf des Schweißstegs (2b) im Wesentlichen dem Verlauf des Kanals (7b) entspricht, wobei sich zwischen dem zweiten Teilkörper (1 b) und dem Werkzeug (5) ein zweiter Innenraum (20b) ausbilden kann und wobei das Werkzeug (5) ein Mittel (30b) zur aktiven Druckregelung umfasst und wobei der Kanal (7b) auf der zweiten Seite (6b) desChannel (7b) comprises means (11b) for supplying hot gas and wherein a welding web (2b) of the second part-body (1b) can be positioned in the region of the channel (7b), the course of the welding web (2b) being essentially the same The course of the channel (7b) corresponds, with a second interior space (20b) being able to form between the second part-body (1b) and the tool (5) and with the tool (5) comprising a means (30b) for active pressure regulation and with the channel (7b) on the second side (6b) of the
Werkzeugs (5) angeordnet ist. Tool (5) is arranged.
14. Werkzeug (5) gemäß einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Mittel (30b) in einem Bereich positioniert ist, der durch den Verlauf des Kanals (7b) umschlossen ist. 14. Tool (5) according to one of claims 1 to 13, characterized in that the means (30b) is positioned in an area which is enclosed by the course of the channel (7b).
15. Verfahren gemäß Anspruch 1 , dadurch gekennzeichnet, dass das Mittel (30a) im ersten Teilkörper (1a) positioniert ist und/oder das Mittel (30b) im zweiten Teilkörper (1 b) positioniert ist. 15. The method according to claim 1, characterized in that the means (30a) is positioned in the first part body (1a) and / or the means (30b) is positioned in the second part body (1 b).
EP20702325.0A 2019-02-14 2020-02-04 Method for producing a moulded body that encloses a cavity by welding two partial bodies, and die for welding two partial bodies Pending EP3924174A1 (en)

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DE10250751A1 (en) 2002-10-31 2004-05-19 Hans Georg Schulz Method for welding plastic parts, in particular for connecting plastic parts along a welding line
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JP6207924B2 (en) * 2013-08-21 2017-10-04 スタンレー電気株式会社 Resin member welding equipment
JP6861736B2 (en) 2016-05-17 2021-04-21 ビーエイエスエフ・ソシエタス・エウロパエアＢａｓｆ Ｓｅ How to weld the molded product
DE102017010550A1 (en) * 2017-11-14 2019-05-16 Roland Barkhoff Device for thermal welding of plastic parts and arrangement containing such a device

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