DE1454943B1 - Verfahren zum Verbinden der Oberfläche eines thermoplastischen Kunststoffteils mit einer anderen Oberfläche - Google Patents

Verfahren zum Verbinden der Oberfläche eines thermoplastischen Kunststoffteils mit einer anderen Oberfläche

Info

Publication number
DE1454943B1
DE1454943B1 DE1963B0070251 DEB0070251A DE1454943B1 DE 1454943 B1 DE1454943 B1 DE 1454943B1 DE 1963B0070251 DE1963B0070251 DE 1963B0070251 DE B0070251 A DEB0070251 A DE B0070251A DE 1454943 B1 DE1454943 B1 DE 1454943B1
Authority
DE
Germany
Prior art keywords
metal foil
thermoplastic
magnet
cylinder
frequency
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
DE1963B0070251
Other languages
English (en)
Inventor
Hermann Beik
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
Publication of DE1454943B1 publication Critical patent/DE1454943B1/de
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/63Internally supporting the article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3668Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124Tongue and groove joints
    • B29C66/1244Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124Tongue and groove joints
    • B29C66/1246Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12461Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being rounded, i.e. U-shaped or C-shaped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining 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
    • B29C66/4322Joining 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/49Internally supporting the, e.g. tubular, article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/54Joining 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
    • B29C66/543Joining 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 more than two hollow-preforms to form said hollow articles
    • B29C66/5432Joining 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 more than two hollow-preforms to form said hollow articles joining hollow covers and hollow bottoms to open ends of container bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/65General 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 with a relative motion between the article and the welding tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/65General 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 with a relative motion between the article and the welding tool
    • B29C66/652General 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 with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/72General 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
    • B29C66/723General 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
    • B29C66/7232General 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
    • B29C66/72321General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/73General 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
    • B29C66/739General 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
    • B29C66/7392General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81427General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81431General 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 cavity, e.g. a groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8221Scissor or lever mechanisms, i.e. involving a pivot point
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8324Joining or pressing tools pivoting around one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General 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
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411Roller, cylinder or drum types
    • B29C66/83413Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B29C66/8362Rollers, cylinders or drums moving relative to and tangentially to the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D15/00Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/04Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper
    • B65D15/06Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper with end walls made of metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D15/00Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/16Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material
    • B65D15/18Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material with end walls made of metal
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/10Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/105Induction heating apparatus, other than furnaces, for specific applications using a susceptor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General 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
    • B29C66/73General 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
    • B29C66/739General 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
    • B29C66/7392General 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
    • B29C66/73921General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81411General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81411General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81411General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423General 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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2705/00Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02Aluminium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/712Containers; Packaging elements or accessories, Packages
    • B29L2031/717Cans, tins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Description

  • Die Erfindung betrifft ein Verfahren zum Verbinden der Oberfläche eines thermoplastischen Kunststoffteil mit einer anderen, insbesondere ebenfalls thermoplastischen Oberfläche durch Aufheizen der Oberflächen mittels einer im Bereich der Oberflächen liegenden wirbelstrombeheizten Metallfolie.
  • Bei dem aus der deutschen Patentschrift 802282 bekannten entsprechenden Verfahren erfolgt die Wirbelstromerhitzung in einem Hochfrequenzfeld.
  • Die Anwendung von Hochfrequenz lag zwar möglicherweise deshalb besonders nahe, weil Hochfrequenzfelder auch zur unmittelbaren Erhitzung und damit zur Verschweißung von Kunststoffen benutzt werden, hat aber den Nachteil eines besonders hohen Energiebedarfs. Außerdem müssen derartige Hochfrequenzgeräte von der Post zugelassen sein, da ihre Frequenz jedenfalls weit über der Grenze von 10 000 Hz liegt.
  • Der Erfindung liegt die Aufgabe zugrunde, einen wesentlich besseren Wirkungsgrad hinsichtlich des Energiebedarfs bei geringerem apparativem Aufwand zu erreichen.
  • Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß man auf die Metallfolie ein quer zu dieser gerichtetes nieder- bis mittelfrequentes Magnetfeld einwirken läßt. Dabei wird zusätzlich der Vorteil erreicht, daß die Anmeldepflicht entfällt solange man unter 10 000 Hz bleibt.
  • Es war außerordentlich überraschend, daß es gelingt, dünne Metallfolien im nieder- bis mittelfrequenten Magnetfeld innerhalb kürzester Zeit so weit zu erhitzen, daß eine ausgezeichnete Siegelverbindung erhalten wird, was für die Herstellung von Verpackungen auf schnellaufenden Verpackungsmaschinen von außerordentlich großer Bedeutung ist. Dazu konnte der Fachmann auch der französichen Patentschrift 1 1181 591 nichts entnehmen, da es aus dieser Patentschrift bekannt war, daß man zum Erhit7en eines drahtförmigen Leiters im Mittelfrequenzfeld 5 bis 15 Sekunden benötigt, während bei dem Verfahren nach der Erfindung nur 0,1 bis 0,3 Sekunden benötigt werden. Es tritt also nicht nur überraschenderweise überhaupt eine ausreichend rasche Erhitzung in einer Metallfolie auf, sondern eine raschere Erhitzung als in wesentlich dickeren Drähten.
  • Da außerdem mit einem quer zu der Metallfolie gerichteten nieder- bis mittelfrequenten Magnetfeld gearbeitet wird, die Folie also praktisch im Schlitz des Magneten erhitzt wird, ist das Verfahren ferner sehr energiesparend im Gegensatz zu dem bekannten Verfahren, bei dem der Draht in einer Spule erhitzt wird.
  • Dabei kann die Folie oder ein Folienstreifen zwischen die zu verbindenden thermoplastischen Oberflächen eingelegt werden. Die miteinander zu verbindenden Oberflächen kommen dann zwar nicht unmittelbar miteinander in Berührung oder jedenfalls nur am Rand der Folie oder des Streifens, so daß die Hauptverbindung nicht durch unmittelbare Verschweißung erreicht wird, aber sie verbinden sich so fest mit der eingelegten Folie, daß über diese eine ausreichende Verbindung zustande kommt.
  • In vielen Fällen genügt es, wenn man die Metalleinlage lose zwischen die zu verbindenden Flächen bringt. Besonders vorteilhaft kann es aber häufig sein, wenn die Metallfolie bereits vor dem eigentlichen Verbindungsvorgang auf einer der zu verbindenden Oberfläche haftend angebracht ist, beispielsweise in der Form einer Oberflächenkaschierung.
  • Vorteilhaft kann die Metallfolie selbst auf einer oder beiden Seiten einen thermoplastischen Überzug aufweisen. Die zu verbindenden Oberflächen brauchen dann nicht selbst thermoplastisch zu sein, sondern die erweichende Beschichtung der Metallfolie bewirkt eine Klebeverbindung mit ihnen, ganz gleich, welcher Art sie auch sein mögen.
  • Vorteilhafterweise kann dieser Gedanke auch so in die Praxis umgesetzt werden, daß das auf einer der Oberflächen als Kaschierung vorliegende Metall auf seiner offenen Seite einen thermoplastischen Überzug aufweist.
  • Es ist häufig vorteilhaft, wenn die Metallfolie einer komplizierten Form einer Verbindungsstelle angepaßt werden muß, das Metall zur Ausbildung der Folie vor dem Verbindungsvorgang in flüssiger Form (beispielsweise als Leitsilber) auf eine der zu verbindenden Oberflächen aufzubringen. Es kann so auch aufgedruckt werden.
  • Weiterhin kann das Metall erfindungsgemäß auch in Pulverform auf eine der Oberflächen aufgetragen werden, wobei im Zusammenhang mit der gewählten Frequenz darauf zu achten ist, daß die einzelnen Metallpartikel miteinander in hinreichender leitender Verbindung stehen'-Wenn diese leitende Verbindung nicht schon durch die Art des Auftrags erzielt wird, kann, sie auch dadurch herbeigeführt werden, daß die Pulverschicht Druck ausgesetzt wird, beispielsweise indem sie fest auf ihre Unterlage aufgewalzt wird. Dadureh-kommt sie gleichzeitig in eine genügende, vorläufige, mechanische Verbindung an ihre Unterlage.
  • Als Material für die Metallfolie hat sich Aluminium als besonders vorteilhaft erwiesen.
  • Bei Verpackungen ist es häufig wünschenswert, die Verbindung später wieder öffnen zu können. Zu diesem Zweck sind Aufreißstreifen bekannt. Bei dem Verfahren nach der Erfindung kann als Metalleinlage für die Nahtstelle eine Metallfolie eines solchen Querschnitts und einer solchen Festigkeit verwendet werden, daß sie selbst zum Aufreißen der Verbindungsnaht verwendbar ist.
  • Es wurde festgestellt, daß die-Verbindung verbessert wird, wenn sie unter Einwirkung von Druck zustande kommt. Während oder nach der Erhitzung der Metallfolie kann zweckmäßig quer zur Oberflächen ausdehnung Druck ausgeübt werden.
  • An sich kommen' alle Bereiche der Nieder- und Mittelfrequenz in Frage, d. h. zwischen den Grenzen von Netzfrequenz und etwa 100 kHz. Jedoch ist die Frequenzwahl auch bis zu einem gewissen Grad von der Art der Metallfolie abhängig. Im Fall größerer Querschnittsabmessungen der Einlage können die Frequenzen verhältnismäßig niedrig gewählt werden.
  • Wenn die Querschnitte dagegen sehr gering sind (insbesondere bei aus Pulver hergestellten Folien), empfiehlt es sich, sie höher zu wählen.
  • Besonders bewährt hat sich für praktische Fälle bei der Verbindung von Verpackungsteilen ein Bereich von 1 bis 10 kHz, und zwar bei einer Folie von etwa 0,01 mm Dicke vor allem eine Frequenz von 5 kHz.
  • Es ist bekannt, daß bei der Anwendung von Hochfrequenz wegen der Kondensatorwirkung nicht mehr als zwei Folienschichten aufeinander liegen dürfen, weil sonst allzu leicht Durchschläge vorkommen.
  • Demgegenüber ist es mit dem erfindungsgemäßen Verfahren möglich, eine praktisch beliebige Zahl aufeinanderliegender Folienschichten miteinander zu verbinden.
  • Bei der Herstellung von Foliennähten kann der Magnet mit einer gewissen Geschwindigkeit, die von der aufgebrachten Leistung der Wärmekapazität der Naht abhängig ist, an der Naht entlanggeführt werden.
  • Dabei hat es sich als vorteilhaft erwiesen, dem Magneten in seiner Bewegungsrichtung unmittelbar ein Druckrollenpaar folgen zu lassen, das die zu verbindenden Flächen aufeinanderpreßt, bevor das erweichte Material wieder erstarrt.
  • Die Magnetpole können jedoch auch selbst mit zur Erzeugung des Anpreßdrucks verwendet werden, indem man sie gegeneinander bewegbar ausbildet.
  • Durch dieses Merkmal wird die Vorrichtung besonders einfach. Die Anordnung kann vorteilhaft auch so getroffen sein, daß die Magnetpole durch Druckrollen gebildet sind.
  • Die Erfindung wird im folgenden an Hand der in der Zeichnung schematisch dargestellten Ausführungsbeispiele näher beschrieben.
  • Fig. 1 zeigt eine mit dem Verfahren nach der Erfindung verschweißbare Runddose aus Kunststoff-Folien mit Teilausschnitten in Fluchtdarstellung; Fig. 2 ist eine vergrößerte Darstellung der Nahtüberlappung des zylindrischen Teils der Runddose in nicht verbundenem Zustand nach F i g. 1 in Pfeilrichtung; F i g. 3 stellt einen SchnittA-B der F i g. 1 vergrößert dar; F i g. 4 veranschaulicht Teile einer Vorrichtung zur Herstellung des Dosenzylinders; Fig. 5 zeigt einen Teilschnitt C-D der F i g. 4; F i g. 6 gibt die Anordnung eines Elektromagneten am Randteil der Runddose wieder; Fig.7 zeigt die Anordnung von Andruckrollen am Randteil der Runddose; F i g. 8 ist ein Schnitt durch ein weiteres Ausführungsbeispiel des Elektromagneten.
  • Die Runddose nach dem Ausführungsbeispiel der Fig. 1 kann mit ihren Einzelteilen, dem Dosenzylinder 1, dem Bodenteil 2 und dem Deckelteil 3 aus Kunststoff oder kunststoffkaschiertem Papier bestehen.
  • Der Dosenzylinder wird hier z. B. aus einem rechteckigen Zusohnitt, der um einen zylindrischen Dorn gerollt wird, hergestellt. Dabei ist der Zuschnitt so bemessen, daß eine Überlappung der Zuschnittenden4 und 5 (Fig. 1 und 2) entsteht. Das Zuschnittende trägt einen Alu-Folienstreifen 6 von etwa 0,01 mm Dicke, der aufkaschiert oder in anderer Weise auf die Trägerfläche aufgetragen und auf der dem Zuschnittende zugekehrten Fläche mit einer thermoplastischen Schicht versehen ist. Ebenso sind die Zylinderenden mit einem Folienstreifen 7, 7' (F i g. 1 und 3) über den gesamten Umfang versehen.
  • Diese Folienstreifen dienen zur festen Verbindung der überlappenden Zuschnittenden 4 und 5 des Dosenzylinders und der Verbindung der Deckel- und Bodenränder 8 und 9 auf dem Rand des Dosenzylinders.
  • Die Verbindung der angeführten Teile wird durch induktive Erwärmung der Folienstreifen mit gleichzeitigem oder nachfolgendem Andruck der Teile zueinander erreicht.
  • Bei Erwärmung der Folienstreifen wird die auf den Folienstreifen vorhandene thermoplastische Schicht erweicht und dient so als Haftmittel der zu verbindenden Teile.
  • Der Zuschnitt des Dosenzylinders wird für die Herstellung des Zylinders über einen Dorn 10 mit hier nicht dargestellten Umführungsmechanismen geführt, wobei die Überlappung 4 und 5 zwischen dem Magnetsteg 11 (F i g. 5) eines mit Wechselstrom erregten Magneten 12 zu liegen kommt.
  • Zweckmäßig wird für die induktive Erwärmung des Folienstreifens 6 im magnetischen Wechselfeld ein Elektromagnet mit Miffelfrequenzerregung von 5 kHz verwendet. Die Eisenteile des Magneten können aus normalen Transformatorblechschnitten angefertigt und durch einen Trennschnitt in zwei Teile 12, 12' geteilt sein, wobei der Trennschnitt entsprechend dem Dosenzylinder-Durchmesser ausgeführt ist.
  • Der Magnetteil 12 trägt die Erregerspule 13 und kann über den Drehhebel 14 (F i g. 4), an dem der Magnet 12 befestigt ist, vom Dorn 10, also von der Überlappungsstelle des Dosenzylinders, nach dem Schweißvorgang abgehoben werden, damit der Dorn 10 für eine nachfolgende Zylinderzuschnittführung frei liegt.
  • Der Magnetteil 12' ist im Dorn 10 fest isoliert gegen den Dorn eingesetzt, beispielsweise mittels Gipsharzes 15.
  • Nach der Umführung des Zylinderzuschnittes um den Dorn 10 und Aufsetzen des Magneten 12 auf die Zylinderüberlappung 4 und 5 wird die Spulel3 zum Frequenzgenerator geschaltet. Das im Spalt zwischen den Magnetstegen 11 und 11' entsprechend der Erregerfrequenz auftretende magnetische Wechselfeld induziert in dem zwischen Ider Überlappung des Zylinderzuschn, itts liegenden Alu-Folienstreifen 6 elektrische Wirbelströme, die den Folienstreifen kurzzeitig auf etwa 2000 C erwärmen und die auf den Folienstreifen vorhandene Kunstharzschicht aufweichen, die nun als Klebemittel die t : Überlappungen bei gleichzeitigem Druck des Magnetsteges 11 verbinden.
  • Da der Folienstreifen nur auf Grund seiner geringen Dicke eine geringe Wärmekapazität hat und diese Wärmemenge schnell über die den Folienstreifen 6 umschließenden Teile abgeführt werden, erstarrt die Kunstharzschicht entsprechend schnell und verbindet die Überlappungen entsprechend kurzzeitig.
  • Die Verbindung des Bodenteils 2 und des Deckelteils 3 auf dem Rand des fertigen Dosenzylinders kann in entsprechender Weise erfolgen. Nach dem Aufsetzen des Deckelteils 3 auf den Dosenzylinderrand, das durch nicht dargestellte Einrichtungen maschinell erfolgen kann, wird bei gleichzeitiger Relativdrehung des Dosenzylinders zu einem feststehenden Magneten 17 der Zylinderrand d mit der Deckelzone durch den Spalt 16 (Fig. 6) dieses Magneten 17 geführt. Das in dem Spalt nach Einschalten der Spule zum Frequenzgenerator auftrelende magnetische Wechselfeld induziert in den Folienstreifen 6 Wirbelströme, so daß sich der Vorgang abspielt, wie er oben beschrieben wurde.
  • An geeigneter Stelle hinter dem Magneten (bei der hier in Pfeilrichtung angegebenen Drehrichtung des Zylinders) sind zweckmäßig Andrückrollen 18 und 19 (Fig. 7) vorgesehen, die für eine bessere Haftung der Schweißverbindung sorgen. An Stelle der Drehung des Dosenzylinders kann natürlich auch der Magnet und die Andruckrolle bewegt werden oder auch beide Teile.
  • Der Magnet kann auch in Topfform ausgeführt sein, wie es in Fig. 8 dargestellt ist. Der Rand des Dosenzylindersl mit dem eingesetzten Deckelteil 3 wird in den Ringspalt 20 des Magneten 21 eingeführt.
  • Natürlich kann auch umgekehrt der Topfmagnet über den Dosenrand geführt werden.
  • Es hat sich gezeigt, daß auf die beschriebene Weise ausgeführte Klebeverbindungen in 0,1 bis 0,3 Sekunden hergestellt werden können. Die Ausführung ist nicht beschränkt auf Runddosen. Es können alle Arten von Schweißverbindungen von thermoplastischen Kunststoffteilen, insbesondere von Folien, hergestellt werden. Als besonders vorteilhaft erweist sich das Verfahren bei metallkaschierten Folien. So können z. B. Packungen verschweißt werden, bei denen grundsätzlich mit Alu-Folien kaschiertes Material verwendet ist. Es kann z. B. auch der Zylindermantel der Runddose vollkommen mit Alu-Folie kaschiert ausgeführt sein.

Claims (9)

  1. Patentansprüche: 1. Verfahren zum Verbinden der Oberfläche eines thermoplastischen Kunststoffteils mit einer anderen, insbesondere ebenfalls thermoplastischen Oberfläche durch Aufheizung der Oberflächen mittels einer im Bereich der Oberflächen liegenden wirbelstrombeheizten Metallfolie, d a d u r c h gekennzeichnet, daß man auf die Metallfolie ein quer zu dieser gerichtetes nieder- bis mittelfrequentes Magnetfeld einwirken läßt.
  2. 2. Verfahren nach Anspruch 1, dadurch ge- kennzeichnet, daß die Metallfolie mit einem Thermoplast beschichtet oder lackiert ist.
  3. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die eine auf einer der Oberflächen als Kaschierung vorliegende Metallfolie auf ihrer offenen Seite einen thermoplastischen Überzug aufweist.
  4. 4. Verfahren nach Anspruch 1 bis 3, gekennzeichnet durch die Verwendung einer Aluminiumfolie.
  5. 5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß man das Magnetfeld mit einer Frequenz von 1 bis 10 kHz etwa 0,1 bis 0,3 Sekunden lang auf eine Aluminiumfolie von etwa 0,01 mm Dicke einwirken läßt.
  6. 6. Vorrichtung zur Ausführung des Verfahrens nach Anspruch 1 bis 5, gekennzeichnet durch einen Hufeisenmagneten (17), zwischen dessen Polen (16) die herzustellende Naht (3) hindurchführbar ist.
  7. 7. Vorrichtung nach Anspruch 6, gekennzeichnet durch ein dem Magneten in Bewegungsrichtung unmittelbar folgendes Druckrollenpaar (18, 19).
  8. 8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Magnetpole (11, 11', 16) während oder nach der Erhitzung des Nahtmetalls zur Erzeugung von Druck auf die zwischenliegende Nahtstelle gegeneinander bewegbar sind.
  9. 9. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Magnetpole als Druckrollen ausgebildet sind.
DE1963B0070251 1963-01-08 1963-01-08 Verfahren zum Verbinden der Oberfläche eines thermoplastischen Kunststoffteils mit einer anderen Oberfläche Pending DE1454943B1 (de)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508006A1 (de) * 1981-06-22 1982-12-24 Nihon Seikan Kk

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE802282C (de) * 1948-10-02 1951-02-08 Siemens & Halske Akt Ges Verfahren zum Verschweissen von Kunststoffteilen miteinander
FR1025496A (fr) * 1950-10-05 1953-04-15 Procédé d'assemblage de pièces en toutes substances thermoplastiques
FR1181591A (fr) * 1956-10-31 1959-06-17 Bronswerk Nv Procédé destiné à la soudure des corps thermoplastiques
FR1197154A (fr) * 1958-05-23 1959-11-27 L Electronique Francaise Soc D Procédé perfectionné pour souder des matières thermoplastiques
DE1076841B (de) * 1955-09-15 1960-03-03 Wild Barfield Electr Furnaces Als Heizrohr ausgebildete Niederfrequenzinduktionsheizeinrichtung fuer Zylinder, beispielsweise Strangpresszylinder von Kunststofformmaschinen
FR1260490A (fr) * 1960-06-23 1961-05-05 Brown Boveri & Compagnie Sa Dispositif pour l'assemblage de pièces ou d'éléments de pièces non métalliques,de préférence en matières thermoplastiques
FR1261896A (fr) * 1960-01-07 1961-05-26 Specialites P P Z Procédé de soudage des matières plastiques à faible angle de pertes, telles que le polystyrène

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE802282C (de) * 1948-10-02 1951-02-08 Siemens & Halske Akt Ges Verfahren zum Verschweissen von Kunststoffteilen miteinander
FR1025496A (fr) * 1950-10-05 1953-04-15 Procédé d'assemblage de pièces en toutes substances thermoplastiques
DE1076841B (de) * 1955-09-15 1960-03-03 Wild Barfield Electr Furnaces Als Heizrohr ausgebildete Niederfrequenzinduktionsheizeinrichtung fuer Zylinder, beispielsweise Strangpresszylinder von Kunststofformmaschinen
FR1181591A (fr) * 1956-10-31 1959-06-17 Bronswerk Nv Procédé destiné à la soudure des corps thermoplastiques
FR1197154A (fr) * 1958-05-23 1959-11-27 L Electronique Francaise Soc D Procédé perfectionné pour souder des matières thermoplastiques
FR1261896A (fr) * 1960-01-07 1961-05-26 Specialites P P Z Procédé de soudage des matières plastiques à faible angle de pertes, telles que le polystyrène
FR1260490A (fr) * 1960-06-23 1961-05-05 Brown Boveri & Compagnie Sa Dispositif pour l'assemblage de pièces ou d'éléments de pièces non métalliques,de préférence en matières thermoplastiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508006A1 (de) * 1981-06-22 1982-12-24 Nihon Seikan Kk

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