DE2212089A1 - Verfahren und vorrichtung zum verschweissen von verbundfolien - Google Patents

Verfahren und vorrichtung zum verschweissen von verbundfolien

Info

Publication number
DE2212089A1
DE2212089A1 DE2212089A DE2212089A DE2212089A1 DE 2212089 A1 DE2212089 A1 DE 2212089A1 DE 2212089 A DE2212089 A DE 2212089A DE 2212089 A DE2212089 A DE 2212089A DE 2212089 A1 DE2212089 A1 DE 2212089A1
Authority
DE
Germany
Prior art keywords
welding
melting
jaws
heated
thermoplastic
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
DE2212089A
Other languages
English (en)
Inventor
Wilhelm Heisig
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE2212089A priority Critical patent/DE2212089A1/de
Publication of DE2212089A1 publication Critical patent/DE2212089A1/de
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
    • 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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/741—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area characterised by the relationships between the joining step and the severing step
    • B29C65/7411—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area characterised by the relationships between the joining step and the severing step characterised by the temperature relationship between the joining step and the severing step
    • B29C65/7412—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area characterised by the relationships between the joining step and the severing step characterised by the temperature relationship between the joining step and the severing step the joining step and the severing step being performed at different temperatures
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7441—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for making welds and cuts of other than simple rectilinear form
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7461—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool for making welds and cuts of other than simple rectilinear form
    • 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
    • B29C66/003—Protecting areas of the parts to be joined from overheating
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/244—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 non-straight, e.g. forming non-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
    • B29C66/40—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
    • B29C66/70—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
    • B29C66/71—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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
    • 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
    • B29C66/723—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 being multi-layered
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/0055—Plastic or rubber gloves
    • A41D19/0068—Two-dimensional gloves, i.e. obtained by superposition of two sheets of material
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • A41D27/245—Hems; Seams made by welding or gluing
    • 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
    • B29C65/38—Impulse heating
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4842—Outerwear
    • B29L2031/4864—Gloves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

  • "Verfahren und Vorrichtung zum Verschweißen von Verbundfolien" Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Verschweißen von übereinanderliegenden Eunststoffverbundfolien, die eine Schicht aus thermoplastischem Material, z.B. Polyäthylen und eine weitere Schicht aus nicht thermoplastischem Material mit höherem Schmelzpunkt z.B. Polyamid, aufweisen, sowie zum Abtrennen der miteinander verschweißten Folienteile von den nicht verschweißten Folienteilen.
  • Bei den bekannten Verbund folien, die beispielsweise zur luftdichten Verpackung von Lebensmitteln und für Schutz kleidung Anwendung finden, weist die thermoplastische Schicht einen Schmelzpunkt von etwa 12o Grad auf9 während die nicht thermoplastische Schicht erst bei etwa 22o Grad schmilzt. Bei einer Erhitzung der Folie auf die Schmelz temperatur der nicht thermoplastischen Schicht würde die thermoplastische Schicht zerstört werden0 Derartige Ver.
  • bundfolien werden daher in der Praxis zunazhst bei einer Temperatur von etwa 12o Grad verschweißt und anschließend die verschweißten Teile mit Hilfe mechanischer Schneidwerkzeuge von den außerhalb der Schweißnaht .liegenden Folienteilen getrennte Da die für derartige Folien verwendeten nicht thermoplastischen Kunststoffe verhältnismäßig spröde sind, werden die Schneidwerkzeuge rasch abgenutzt. Außerdem führt die Hiterialsprödigkeit dazu, daß die Folenränder beim Ausstanzen zum Teil bis in die Schweißnaht einreissen, so daß z.B. Verpackungen an diesen Stellen leicht undicht werden können.
  • Bei unregelmäßig geformten Schweißnihten, wie sie beispielsweise bei Schutzkleidungen aus Verbundfolie auftreten, ist außerdem der Aufwand für das Herstellen und Nachschärfen der Schneidwerkzeuge außerordentl ch hoch.
  • Aufgabe der Erfindung ist es, das Verfahren zum Verschweißen von Verbundfolien, sowie das Abtrennen der verschweißten Folienteile wesentlich zu vereinfachen und den Vorrichtungsaufwand zum Durchführen dieses Verfahrens erheblich zu verringern.
  • Erfindungsgemäß wird diese 1;tifgabo dadurch gelöst, daß die Folien im Bereich der Schweißnaht unter Druck auf Schweißtemperatur erhitst und entlang der Schweißnaht gleichzeitig eine schmals Zone au@ die Schmelztemperatur «r nicht thermoplastischen Folienschicht erhitzt wird.
  • Dabei erfolgt die Erhitzung auf Schmelztemperatur vorteilhaft ebenfalls unter Druck.
  • Durch das erfindungsgemäße Verfahren wird es möglich, Verbundfolien in einem Arbeitsgang miteinander zu verschweißen und die miteinander verschweißten Folienteile von den übrigen Folienteilen zu trennen, wobei die beim mechanischen Abtrennen infolge der Naterialsprödigkeit auftretende -Rißblldung sicher verhindert wird.
  • Das erfindungsgemäße Verfahren läßt sich vorteilhaft mit einer Vorrichtung ausübgen, die einen entsprechend der Linienführung der Schweißnaht geformten kontinuierlich auf Schweißtempertur beheizten Schweißbacken aufweist, an dem entlang ein auf Schmelztemperatur erhitzbarer Schmelzbacken angeordnet ist, der gegenüber dem Schweißbacken thermisch und/oder elektrisch isoliert ist.
  • Besonders vorteilhaft ist es, wenn der Schmelzbacken als ein durch Stromimpulse heizbares Band aus elektrischem Widerstandsmaterial ausgebildet ist, das beim Abtrennen mit einer Schmalseite mit Druck auf den wobei dieser Druck durch eine in Richtung des Schweißdruckes orientierte Federkraft erzeugt werden kann.
  • In diesem Falle ist der Schmelzbacken verschiebbar an dem Schweißbackenträger befestigt.
  • Es ist Jedoch im Rahmen der Erfindung auch möglich, den Schmelzbacken derart starr an dem Schweißbacken zu befestigen, daß et diesenin Richtung des Schweißdruckes etwa um Folienstärke überragt. In diesem Falle .wennJ ist es günstig, die Auflage für die zu verschweißenden und abzutrennenden Folien gummielastisch ausgebildet.
  • ist (Silikongummi). Die Taktzeiten für das Verschweißen und Abtrennen der Folien lassen sich nach einer weiteren Ausbildung der Erfindung dadurch verringern, daß unterhalb des Schweißbackenträgers eine Wärmedämmplatte angeordnet ist, die in besonders kritischen Fällen eine Flüssigkeitskuhlung aufweisen kann.
  • In der Zeichnung sinc Ausführungsbeispiele erfindungsgemäß ausgebildeter Vorrichtungen zum Verschweißen von Verbundfolien und Abtrennen der verschweißten Folienteile von dem übrigen Folienrest dargestellt.
  • Es zeigen: Fig. 1 eine schematische Darstellung einer Gesamtanlage, Fig. 2 ein Ausfüiir'angsbeispiel eines kombinierten Schweiß-und Trennwerkzeuges im Schnitt, Fig. 3 eine weitere Ausführungsform eines kombinierten Schweiß- und Trennwerkzeuges im Schnitt, Fig. 4 einen aus zwei übereinanderliegenden Folienbahnen nach dem erfindungsgemäßen Verfahren hergestellten Handschuh.
  • Die Anlage zum Verschweißen von übereinanderliegenden Verbundfolien entsprechend der Darstellung in Figur 1 weist eine kombinierte Schweiß- und Abtrennvorrichtung 1 auf, der eine ortsfeste Unterlage 2 zugeordnet iste Zwischen der Vorrichtung 1 und der Unterlage 2 verläuft ein Förder band 3, auf dem die von Vorratsrollen 4, 5 abgezogenen Verbundfolien 6, 7 unter dem Werkzeug 1 hindurchgefühft werden, das entsprechend dem Arbeitstakt Schweißen/Abtrennen und Naterialvorschub wechselweise angehoben und abgesenlct wird. Die Schweißnähte der fertig bearbeiteten Folienteile 8 werden nach dem Werkzeug-1 durch eine Luftdüse 9 gekühlt und anschließend von dem Förderband 3 abgenommene Die Vorrichtung 1-weist nach dem Ausfüh.rungsbeispiel nach Fig. 2 einen Träger lo für die Schweißbacken 11 auf, , der.
  • ständig auf Schweißtemperatur gehalten wird. Außerdem sind an dem Träger lo gegen die Wirkung von Federn 12 höhen verschiebbare Tragelemente 13 für Schmelzbacken 14 ange ordnet, die aus bandförmigem Widerstandsmter'ial bestehen und so angeordnet sind, daß sie die Arbeitsflächen 15 der Schweißbacken 11 überragen. Während die Schweißbacken 11 über den Träger 1o durch Wärmeleitung auf eine Schweißtemperatur von etwa 12o Grad aufgehitzt werden, erfolgt die Aufheizung der Schmelz backen c@ 14 auf die Schmelztemperatur auf etwa 22o Gred durch kurze Stromimpulse während des Abtrennvorganges. Der aus Messing bestehende Schweißbacken 11 ist mit einer Teflonschicht 16 versehen, die einerseits das Festkleben der zu verschweißenden Folie an dem Schweißbecken verhindert und außerdem gegenüber der Schmelzbacke eine elektrische Isolation darstellt.
  • Bei dem Ausfübrangsbeispiel der Vorrichtung 1 nach Fig ist der Schmelzbacken 14 mittels isolierter Schrauben 17 starr an dem Schweißbacken 11 derart befestigt, daß er diesen in Schweißrichtung überragt. Die Auflage 2 weist in diesem Falle eine gummielastischicht, beispielsweise aus Silikongummi auf. Zur Verhinderung von ungewollten thermischen Einflüssen durch Wärmeabstrahlung von tie Tr£ger 10 auf die ZU bearbeitenden Folien ist unterhalb des Trägers 10 eine Wärmedämmplatte 18 angeordnet, die Leitungen 19 zur Flüssigkeitskühlung aufweist.
  • Beim Absenken der Vorrichtung 1 gegen die Auflage 2 werden in einem Arbeitsgang entsprechend der Darstellung in Fig. 4 die aufeinanderliegenden Poligen bahnen 6, 7 durch eine der Form eines Handschuhes 20 entsprechenden Schweißnaht 21 durch Aufpressen des Schweißbackens 11 miteinander verbunden und der Eandç schuh 20 gleichzeitig durch eine von dem Schmelz backen 14 erzeuge linienförmige Scbinelzzone 22 von den Folienbahnen 6, 7 getrennt.

Claims (9)

  1. Patentansprüche
    Verfahren zum Verschweißen von übereinanderliegenden Kunststoffverbundfolien, die eine Schicht aus thermoplastischem Material, z.B. Polyäthylen und eine weitere Schicht aus nicht thermoplastischem Material mit höherem Schmelzpunkt, z.B. Polyamid, aufweisen, sowie zum Abtrennen der miteinander verschweißten Folienteile von den nicht verschweißten Folienteilen, dadurch gekennzeichnet, daß die Folien (6, 7) im Bereich der Schweißnaht (21) unter Druck auf Schweißtemperatur erhitzt und entlang der Schweißnaht (21) gleichzeitig eine schmales insbesondere linienförmige Zone auf die Schmelztemperatur der nicht thermoplastischen Folienschicht erhitzt wird.
  2. 2. Verfahren zack Anbruch X, dadurch gekennzeichnet, daß die Erhitzung auf Schmelztemperatur ebenfalls unter Druck erfolgt.
  3. 3. vorrichtung zum Ausüben des Verfahrens nach Anspruch 1 mit einem entsprechend der Linienführung der Schweißnaht geformten kontinuierlich beheizten Schweißbacken, d a d u r c h g e k e n n z e i c h n e t, daß entlang dem Schweißbacken (11) ein auf Schmelztemperatur erhitzbarer Schmelzbacken (14) angeordnet ist, der gegenüber dem Schweißbacken (11) thermisch und/oder ] elektrisch isoliert ist.
  4. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Schmelzbacken (14) als ein durch Stromimpulse heizbares Band aus elektrischem Widerstandsmaterial ausgebildet ist.
  5. 5. Vorrichtung nach.Anspruch 3, dadurch gekennzeichnet, daß der Schmelzbacken (14) in Richtung des Schweißdruckes gegen Federkraft verschiebbar an dem Schweißbackenträger (lo) gehaltert ist.
  6. 6. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Schmelzbacken (14) derart starr an dem Schweißbacken (11) befestigt ist, daß er diesen in Richtung des Schweißdruckes überragt.
  7. 7. Vorrichtung nach den Ansprüchen 3 und 6, gekennzeichnet durch eine gummielastische Auflage (2) Sür die zu verschweißenden Folien (6, 7).
  8. 8. Vorrichtung nach Anspruch 3 dadurch gekennzeichnet, daß unterhalb des Schweißbackenträgers (lo) eine Warmedämmplatte (18) angeordnet ist.
  9. 9. Vorrichtung nach den Ansprüchen 3 und 89 dadurch gekenn zeichnet, daß die Wärmedänimplatte (18) eine Flüssigkeits kühlung (19) aufweist.
DE2212089A 1972-03-13 1972-03-13 Verfahren und vorrichtung zum verschweissen von verbundfolien Pending DE2212089A1 (de)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441988A1 (de) * 1984-11-16 1986-05-22 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Verfahren zum thermischen verbinden zweier kunststoffteile
EP0335270A1 (de) * 1988-03-28 1989-10-04 Evald A. Nyborg A/S Vorrichtung zum sequentiellen Schweissen von endlosen, thermoplastischen Platten entlang festgelegter Konturen und zum Abtrennen von Artikeln aus solchen Platten
FR2871408A1 (fr) * 2004-06-10 2005-12-16 Peugeot Citroen Automobiles Sa Procede de fabrication d'une piece textile et dispositif de mise en oeuvre dudit procede
IT202100020207A1 (it) * 2021-07-28 2023-01-28 Sarong Spa Stampo di riscaldamento e saldatura

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3441988A1 (de) * 1984-11-16 1986-05-22 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Verfahren zum thermischen verbinden zweier kunststoffteile
EP0335270A1 (de) * 1988-03-28 1989-10-04 Evald A. Nyborg A/S Vorrichtung zum sequentiellen Schweissen von endlosen, thermoplastischen Platten entlang festgelegter Konturen und zum Abtrennen von Artikeln aus solchen Platten
FR2871408A1 (fr) * 2004-06-10 2005-12-16 Peugeot Citroen Automobiles Sa Procede de fabrication d'une piece textile et dispositif de mise en oeuvre dudit procede
IT202100020207A1 (it) * 2021-07-28 2023-01-28 Sarong Spa Stampo di riscaldamento e saldatura
WO2023007302A1 (en) * 2021-07-28 2023-02-02 Sarong Societa' Per Azioni Heating and welding mould

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