EP0000643A2 - Soudage de matières plastiques - Google Patents

Soudage de matières plastiques Download PDF

Info

Publication number
EP0000643A2
EP0000643A2 EP78300166A EP78300166A EP0000643A2 EP 0000643 A2 EP0000643 A2 EP 0000643A2 EP 78300166 A EP78300166 A EP 78300166A EP 78300166 A EP78300166 A EP 78300166A EP 0000643 A2 EP0000643 A2 EP 0000643A2
Authority
EP
European Patent Office
Prior art keywords
strip
sheet
edge portions
seam
groove
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.)
Withdrawn
Application number
EP78300166A
Other languages
German (de)
English (en)
Other versions
EP0000643A3 (fr
Inventor
John Reginald Bartlett
Eric John Rusling
Peter Hollenberg
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.)
DRG UK Ltd
Original Assignee
DRG UK Ltd
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 DRG UK Ltd filed Critical DRG UK Ltd
Publication of EP0000643A2 publication Critical patent/EP0000643A2/fr
Publication of EP0000643A3 publication Critical patent/EP0000643A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
    • 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
    • B29C65/12—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 and welding bar
    • 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
    • B29C65/40—Applying molten plastics, e.g. hot melt
    • B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • 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
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
    • B29C66/30321—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of protrusions belonging to at least one 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
    • B29C66/30325—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one 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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • 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
    • B29C66/542—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 joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • B29C66/723—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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72321—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 comprising a non-plastics layer consisting of metals or their alloys
    • 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

Definitions

  • This invention relates to seaming plastics materials and more particularly to seaming plastics material either to itself or to a metal member to form a container.
  • a method of seaming together two edge portions of plastics sheet material comprising bringing the edge portions towards each other substantially edge-to-edge but with a small gap between them, applying a strip of a compatible plastics material in the groove thus formed between the edges, the strip being heated sufficiently to produce a weld between the edge portions and the strip.
  • the edge portions may be at opposing edges of a single sheet, so that a tube is formed when the edge portions are joined.
  • the thickness of the two edge portions is reduced prior to applying the strip, the strip extending over the areas of reduced thickness.
  • the edge portions may be reduced in thickness by chamfering.
  • at least the sheet material comprises a foamed plastics material.
  • Heat may be provided to the joint by extruding the strip directly into the groove, the heat coming from the freshly extruded material.
  • heat may be applied to both the strip and the edge portions by directing a jet of hot gas towards the joint as the strip moves towards the groove.
  • the hot gas may be air, but to prevent oxidation of the plastics material and thus ensure a weld of good strength, the hot gas is preferably an inert gas, e.g. nitrogen.
  • the joint can be formed by a continuous proceslrwherein the strip is laid longitudinally along the joint at a given point past which the strip and the edge portions are advanced. The jet of hot gas can then be directed between the strip and the edge portions at the given point.
  • pressure is applied to the joint after formation of the seam but while the material is still hot so as to provide a substantially flush seam.
  • a method of forming a can from a tubular body of sheet material in which an end member having an upstanding annular wall and an out-turned annular flange extending from the edge of the well is placed over the end of the tubular body so that the upstanding wall fits closely within the tubulur boay, and turning the annular flange around the outside of the body to form a circumferential seam, characterised in that the tubular body comprises a foamed plastics material which is not turned with the flange of the end member and said flange is turned so as to be retained behind a shoulder formed in the outside surface of the end portion of the body.
  • the sheet material may consist only of foamed plastics, or it may be a laminate with other plastics or with metal foil or both.
  • the method may include the initial step of forming a circumferential bead at said end portion of the body, the peripheral flange being retained behind the shoulder provided by the bead when the circumferential seam is formed. Preferaoly the periphery is turned back on the peripheral portion to form a hem which lies against the body when the circumferential seam is formed. The hem comprosses the material of the body when the circumferential seam is formed, thereby forming a retaining sacuicerin the material in addition to that provided by the directed bead, or instead of it if there is an outwardly directed bead.
  • the face of the peripheral portion of the end member which is nearest the end of the body when the seam is formed may be initially coated with a gasket of resinous material to fill any voids between the peripheral portion of the end member and the end portion of the body when the circumferential seam is formed, and to seal the seam.
  • the method can be used to join two opposing end members to the body.
  • a method of seaming together two edge portions of plastics sheet material comprising reducing the thickness of one edge portion on one side thereof, laying the other edge portion over the reduced edge portion and sealing them together.
  • the thickness of the other edge portion is reduced on an opposing side thereof in order to produce a seam flush with the sheet material.
  • at least one matching corrugation is formed in each said side as or when it is reduced, one said side is laid over the other, and heat is applied to the edge portion to weld said sides together.
  • the plastics material is foamed.
  • the steps of reducing the thickness and forming a corrugation in each edge portion are performed together by rolling the edge portion with a roller having a profile of the desired corrugated configuration.
  • the edge portions may be at opposing edges of a single sheet, so that a tube is formed when said sides are laid over each other.
  • Such cans may have metal end members as described, or in some aspects of the invention the end members may be of plastics material sealed to the body.
  • FIGs. 1 to 3 A preferred method of forming tubular bodies 10 with a longitudinal seam is illustrated in Figs. 1 to 3.
  • a long tube of foamed plastics material is formed by progressively bringing towards each other the opposing edges of a long web of material.
  • tubes may be similarly formed individually in blanks of one or several can length of foamed material.
  • the edge portions may be reduced in thickness by chamfering, as seen in Fig. 1. The chamfering can either.be by removal of material, or by passing the edge portions between rollers to compress the material.
  • the chamfered edge portions 24 When brought towards each other so that they almost touch, the chamfered edge portions 24 form a Y-shaped groove into which is laid a strip 26 which may be of the same plastics material as the tube or a material which is compatible therewith.
  • a strip 26 which may be of the same plastics material as the tube or a material which is compatible therewith.
  • a jet 30 of hot nitrogen is directed towards the point at which the strip 26 is laid in the Y-shaped groove, and the heat of this jet welds together the strip 26 and the chamfered edges 24.
  • the strip 26 is originally rectangular in cross-section, but the combination of heat and pressure causes it to fill the Y-shaped groove without appreciably increasing the thickness of the seam. If the strip is of foamed material there may be some degree of collapse of the foamed material of the strip to assist this.
  • the strip 26 can be of a non-foamed material if desired. Such material may be directly extruded into the groove, the heat of the molten material serving to weld it to the edges of the tube,thereby eliminating the need for a separate heat supply.
  • the strip could be extruded to any desired cross-sectional configuration; for example so that it conforms more closely to the shape of the groove.
  • the strip 26 may be applied to a Y-shaped groove on the inside of the tube 10 instead of the outside.
  • a seam formed in this manner has a narrower externally exposed seam and can more easily give a flush outer surface which can be post-printed if desired.
  • the groove need not be Y-shaped, but could have other profiles, or for example be a simple rectangular shape formed by bringing two non-chamfered edges towards each other.
  • the method may be used to form a seam in a spirally wound tubular body instead of a longitudinal seam.
  • foamed plastics for example filled plastics materials such as Kartothene (Registered Trade Mark), or coated, laminated or co-extruded plastics materials, which may or may not have a foamed component and might have an aluminium layer.
  • filled plastics materials such as Kartothene (Registered Trade Mark), or coated, laminated or co-extruded plastics materials, which may or may not have a foamed component and might have an aluminium layer.
  • the cans formed can be used for packaging a wide range of goods such as powders (e.g. dried milk, instant potato); liquids such as oil or paint, other foods normally packaged in metal cans, or carbonated drinks.
  • the cans may also be used as outer casings for batteries etc.
  • a tubular body 10 for a can is formed from foamed plastics material as described above.
  • the material may for example be chalk- filled polypropylene having a thickness of 1200 microns and comprising 40% chalk and 60% polypropylene.
  • An outward peripheral bead t2 is formed in one end of the body 10 by conventional methods and provides a shoulder for retaining a metal end member as described below.
  • a metal end member 14 for the can has an upstanding wall 16 and fits inside the end of the body 10.
  • the end member 14 has a radially extending peripheral flange 18, which is shown in its initial state in Fig. 4. As seen in Fig. 4, an edge portion 20 of the flange 18 is turned downwardly.
  • the undersurface 22 of the flange 18 (nearest the bead 12) can be coated with a resinous material which forms a gasket as described later.
  • the flange 18 is crimped around the bead 12 to a position in which it is generally parallel with the tubular body 10, though as can be seen in Fig. 5 it is turned slightly inwards.
  • the edge portion 20 is turned back against the peripheral flange 18 to form a hem, and as the flange 18 is turned round a bead 12 the material of the body 10 underneath the bead is compressed between the hem and the upstanding wall 16, as shown in Fig. 5.
  • the hem 20 is therefore securely retained behind the bead 12.
  • the upstanding wall 16 is pushed radially outwardly slightly, into the thickness of the tubular body 10, thus ensuring that the bead 12 is firmly gripped. If resin is provided on the undersurface 22 of the flange 18, it flows to fill any void in the seam thus formed and forms a gasket to seal the seam.
  • end members 14 are seamed to the tubular body 10 at each end thereof.
  • the form of the end member may of course vary, e.g. it may be annular and receive a press-in lid.
  • the tubular body 10 is formed from a -sheet of foamed plastics material, two opposing edges of which are joined together in a longitudinal seam to form the tube as hereinbefore described. If the longitudinal seam were appreciably thicker than the sheet material of the body 10 it would be difficult to seam hermetically the end member 14 to the body 10 in the region of the longitudinal seam. The foregoing method of seaming can produce a longitudinal seam which is not appreciably thicker than the sheet material.
  • a long tube 10 is formed somewhat similarly to the previous methods from a long web of foamed plastics material, but the opposing edge portions 40 of the web are brought together in overlapping relationship instead of edge-to-edge relationship. So that the seam thus formed is not appreciably thicker than the web, the overlapping edge portions are first reduced in thickness by rolling.
  • the rolling could be done by cylindrical rollers, it is preferably performed as the two edge portions are being brought together by two rolls 30 which are rotatable in the direction shown about axles 32 and which have circumferential peaks and troughs 34.
  • Pressure pads 36 are provided on the opposite sides of the edge portions, and when the edge portions are progressed past the rolls 30 they are reduced in thickness and longitudinal corrugations are formed in the reduced edge portions.
  • the peaks and troughs 34 are so arranged on the two rolls 30 that the corrugations thus formed in the two edge portions co-operate with each other as can be seen in the detail in Fig. 8.
  • heat is applied either by a jet of hot gas, e.g. nitrogen, or by other means. Pressure is also applied.
  • the edge portions are thus welded together.
  • the rolls 30 have end stops 38 which help to guide the edge portions. When the tube is formed, it can be cut into individual can lengths as before.
  • One advantage of this method is that because the longitudinal corrugations in the edge portions co-operate with each other it is very easy to ensure that there is no wander between the edge portions as they are brought together. This is particularly important if the tube is formed around a mandrel, because otherwise there will be a tendency for the tube to grip the mandrel tightly as the edges are brought together, and also helps to ensure that the end members 14 are a good fit on the tubular bodies when cans are being formed.
  • just one of the edge portions may be reduced in thickness, for example by chamfering, and the other edge portion is laid over it and sealed thereto as described above.
  • the sheet material need not be of foamed plastics.
  • the sheet 10 could be extruded in flat form, with the regions 40 of reduced thickness formed directly by the shape of the extrusion die.
  • a single wide sheet could be extruded, with one or more additional reduced thickness regions intermediate the edges, the reduced thickness regions across the sheet being on alternate sides of the sheet, the wide sheet then being cut longitudinally midway along the intermediate reduced thickness regions to provide from the one wide sheet two or more sheets 10 having reduced thickness regions only along the edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP78300166A 1977-07-22 1978-07-19 Soudage de matières plastiques Withdrawn EP0000643A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3095977 1977-07-22
GB3095977 1977-07-22

Publications (2)

Publication Number Publication Date
EP0000643A2 true EP0000643A2 (fr) 1979-02-07
EP0000643A3 EP0000643A3 (fr) 1979-06-13

Family

ID=10315773

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300166A Withdrawn EP0000643A3 (fr) 1977-07-22 1978-07-19 Soudage de matières plastiques

Country Status (5)

Country Link
EP (1) EP0000643A3 (fr)
JP (1) JPS54119575A (fr)
AU (1) AU3822678A (fr)
CA (1) CA1112418A (fr)
ZA (1) ZA784061B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619009A1 (fr) * 2004-07-19 2006-01-25 Tarkett SAS Procédé de fabrication d'un cordon de soudure
US9505294B2 (en) * 2014-12-05 2016-11-29 Toyoda Gosei Co., Ltd. Weather strip, weather strip joining die set, and weather strip manufacturing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115972507A (zh) * 2022-12-29 2023-04-18 瀚德汽车密封系统(铁岭)有限公司 一种接角模具、接角工艺方法及无接缝汽车密封条

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB735795A (en) * 1952-04-23 1955-08-31 Const Mecaniques De Stains Soc Improvements in or relating to the welding of thermoplastic material
GB986963A (en) * 1963-01-21 1965-03-24 Bat Applic Et Revetements Plas Improvements in or relating to welding cords
FR1543889A (fr) * 1966-11-12 1968-10-25 Hoechst Ag Dispositif de soudage pour pièces en matières thermoplastiques
DE2013333A1 (de) * 1969-04-09 1971-01-21 Expenmentalnoe Proizvodstvo po Raziabotke i Izgotovleniju Sredstv Mek hanizatsii v Stroitelstve Tresta Kievorg stroi, Kiew (Sowjetunion) Einrichtung zum Schweißen von Tafeln aus thermoplastischem Werkstoff, insbesondere von Linoleum
DE2057565A1 (de) * 1970-11-23 1972-06-22 Nobis Richard Pregler Plattenfoermiges oder bahnenfoermiges Bauteil und Verfahren zu seiner Herstellung
DE2116510A1 (en) * 1971-04-05 1972-10-12 Clouth Gummiwerke Ag Welding pvc - using triangular weld thread fed into vee groove
FR2163420A1 (en) * 1971-12-14 1973-07-27 Steiger Engineering Ag Welding of ptfe - using an interlayer of ptfe powder gelled at low pressures
US3853669A (en) * 1972-08-28 1974-12-10 P Werstlein Welding tip for plastic welding gun

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB735795A (en) * 1952-04-23 1955-08-31 Const Mecaniques De Stains Soc Improvements in or relating to the welding of thermoplastic material
GB986963A (en) * 1963-01-21 1965-03-24 Bat Applic Et Revetements Plas Improvements in or relating to welding cords
FR1543889A (fr) * 1966-11-12 1968-10-25 Hoechst Ag Dispositif de soudage pour pièces en matières thermoplastiques
DE2013333A1 (de) * 1969-04-09 1971-01-21 Expenmentalnoe Proizvodstvo po Raziabotke i Izgotovleniju Sredstv Mek hanizatsii v Stroitelstve Tresta Kievorg stroi, Kiew (Sowjetunion) Einrichtung zum Schweißen von Tafeln aus thermoplastischem Werkstoff, insbesondere von Linoleum
DE2057565A1 (de) * 1970-11-23 1972-06-22 Nobis Richard Pregler Plattenfoermiges oder bahnenfoermiges Bauteil und Verfahren zu seiner Herstellung
DE2116510A1 (en) * 1971-04-05 1972-10-12 Clouth Gummiwerke Ag Welding pvc - using triangular weld thread fed into vee groove
FR2163420A1 (en) * 1971-12-14 1973-07-27 Steiger Engineering Ag Welding of ptfe - using an interlayer of ptfe powder gelled at low pressures
US3853669A (en) * 1972-08-28 1974-12-10 P Werstlein Welding tip for plastic welding gun

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619009A1 (fr) * 2004-07-19 2006-01-25 Tarkett SAS Procédé de fabrication d'un cordon de soudure
WO2006008254A1 (fr) * 2004-07-19 2006-01-26 Tarkett Sas Procede de fabrication d'un cordon de soudure
US9505294B2 (en) * 2014-12-05 2016-11-29 Toyoda Gosei Co., Ltd. Weather strip, weather strip joining die set, and weather strip manufacturing method

Also Published As

Publication number Publication date
AU3822678A (en) 1980-01-24
ZA784061B (en) 1979-07-25
EP0000643A3 (fr) 1979-06-13
JPS54119575A (en) 1979-09-17
CA1112418A (fr) 1981-11-17

Similar Documents

Publication Publication Date Title
EP0967153B1 (fr) Récipient composite et étanche et méthode de fabrication d'un récipient composite étanche
US6234386B1 (en) Container with heat seal surface having a substantially planar portion
US4268336A (en) Method of manufacturing containers
US6244500B1 (en) Polymeric liner ply for tubular containers and methods and apparatus for manufacturing same
CA2322727C (fr) Contenant tubulaire a thermoscellage presentant des joncs internes et externes dissymetriques
US11760528B2 (en) Paper-based composite container for off-gassing products, and method for making same
US5566529A (en) Process for manufacturing a tubular package, and package obtained by the implementation of the process
EP1104744A2 (fr) Récipient composite et procédé pour de thermoscellage de récipients composites
US4785992A (en) Container and method of making the same
EP0390816B1 (fr) Fermetures en plastique pour recipients et boites, et procedes et appareil de production de telles fermetures
US6189744B1 (en) Containers
GB2166409A (en) Closures with pull tabs
US3406614A (en) Tubular member and method for making the same and container made therefrom
US3816206A (en) Method for protecting raw metal edge of inside lap of adhesively bonded lap side seam tubular body
JPH0317710B2 (fr)
US3381594A (en) Liquid package and process for producing the same
EP0000643A2 (fr) Soudage de matières plastiques
EP1033239B1 (fr) Dispositif pour la formation d'un bord extérieur roulé sur le corps cylindrique d'un récipient
US20130105499A1 (en) Three-Piece Can and Method of Making Same
GB2117351A (en) Re-closable bags and the production thereof
US6248194B1 (en) Process of making fabricated tube construction
EP0356874A1 (fr) Récipient métallique
JPS6149103B2 (fr)
JPS5835458B2 (ja) 金属箔を用いたプラスチツク容器の製造方法
US1748036A (en) Method of making sheet-metal barrels or drums

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR GB NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE CH DE FR GB NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn
RIN1 Information on inventor provided before grant (corrected)

Inventor name: RUSLING, ERIC JOHN

Inventor name: BARTLETT, JOHN REGINALD

Inventor name: HOLLENBERG, PETER