DE69401554T2 - Eine Vorrichtung für das Abdichten von thermoplastoberflächenbelegtes Verpackungsmaterial - Google Patents

Eine Vorrichtung für das Abdichten von thermoplastoberflächenbelegtes Verpackungsmaterial

Info

Publication number
DE69401554T2
DE69401554T2 DE69401554T DE69401554T DE69401554T2 DE 69401554 T2 DE69401554 T2 DE 69401554T2 DE 69401554 T DE69401554 T DE 69401554T DE 69401554 T DE69401554 T DE 69401554T DE 69401554 T2 DE69401554 T2 DE 69401554T2
Authority
DE
Germany
Prior art keywords
conductors
sealing
inductor
packaging material
approximately
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.)
Expired - Lifetime
Application number
DE69401554T
Other languages
English (en)
Other versions
DE69401554D1 (de
Inventor
Peter Blomqvist
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of DE69401554D1 publication Critical patent/DE69401554D1/de
Application granted granted Critical
Publication of DE69401554T2 publication Critical patent/DE69401554T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3604—Joining 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
    • B29C65/3656—Joining 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 layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3668—Joining 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
    • 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
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3672—Joining 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
    • B29C65/3676—Joining 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
    • B29C65/368—Joining 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer

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

Description

    TECHNISCHES GEBIET
  • Die vorliegende Erfindung betrifft eine Vorrichtung zum Versiegeln eines thermoplastbeschichteten Materials mit wenigstens einer Schicht aus einer Metallfolie, bevorzugt Aluminium, wobei die Vorrichtung einen Induktor aufweist, der mit einer Hochfrequenzstromquelle verbunden werden kann und im wesentlichen parallele, etwas voneinander beabstandete Leiter, einen Kern aus Magnetmaterial scwie einen elektrisch isolierenden Trägerabschnitt aufweist.
    • STAND DER TECHNIK
  • In der Verpackungsindustrie ist seit langem bekannt, Verpakkungsmaterialien mit äußeren Thermoplastschichten zu verwenden, die nach Erwärmung und Kompression miteinander durch Schmelzung versiegelt werden können, um dichte und haltbare Versiegelungsverbindungen oder -nähte zu bilden. Ein solches Material kann beispielsweise in Bahnform durch eine Füllmaschine zugeführt werden und zu einem Schlauch geformt werden, der mittels einer Überlappungsverbindung in Längsrichtung versiegelt wird. Dieser Materialschlauch wird mit dem gewünschten Inhalt gefüllt, woraufhin der Schlauch querversiegelt und abgetrennt wird, um einzelne Packungen zu bilden, die in einem späteren Stadium beispielsweise zu quaderförmigen Packungen oder Kartons fertig geformt werden.
  • Ein Verpackungsmaterial mit einer Metallfolie, bevorzugt einer Aluminiumfolie, wird idealerweise verwendet, wenn die Querversiegelungen durch sogenannte Induktionsversiegelung hergestellt werden. Eine Vorrichtung für eine solche Induktionsversiegelung ist in der schwedischen Patentschrift SE 451 973 offenbart und beschrieben. In diesem Fall wird in der Aluminiumschicht des Verpackungsmaterials ein Induktionsstrom induziert, der die angrenzend an die Aluminiumschicht angeordnete Thermoplastschicht derart erwärmt, daß sie mit einer entsprechenden Thermoplastschicht versiegelt werden kann.
  • Das oben beschriebene Verfahren zum Querversiegeln von Verpakkungsrohlingen nach der oben offenbarten Patentschrift hat sich jedoch für hochviskose Produkte sowie Produkte mit Teilchen wie Kernen, Fruchtsamen oder Fasern als ungeeignet erwiesen. Nach dem oben beschriebenen Verfahren werden zwei im wesentlichen parallele Querversiegelungen hergestellt, zwischen denen der Verpackungsschlauch getrennt wird, um einzelne Verpackungsrohlinge herzustellen. In diesem Fall werden Versiegelungsklappen oder -rippen erzeugt, die außerhalb der Querversiegelungen liegen und in denen sich Produktreste ansammeln können. Diese Produktreste können beim Lagern der Packung ein sehr unangenehmes und ungesundes Aussehen annehmen.
    • AUFGABE DER ERFINDUNG
  • Eine Aufgabe der vorliegenden Erfindung liegt darin, eine Vorrichtung zur Induktionsversiegelung herzustellen, die zur Verwendung mit Produkten geeignet ist, die hochviskos sind oder Teilchen wie Kerne, Fruchtsamen oder Fasern enthalten, und bei der die Querversiegelung der Packung derart hergestellt wird, daß keine Versiegelungsklappen oder -rippen erzeugt werden, wo sich Produktreste sammeln können.
    • LÖSUNG
  • Diese und weitere Aufgaben wurden nach der vorliegenden Erfindung dadurch gelst, daß die in der Einleitung beschriebene Vorrichtung das kennzeichnende Merkmal erhielt, nach dem die Zahl der Leiter drei beträgt, die derart angeordnet sind, daß die Stromdichte in den Leitern etwa gleich ist.
  • Bevorzugte Ausführungsformen der vorliegenden Erfindung erhielten ferner die in den beigefügten Unteransprüchen dargelegten kennzeichnenden Merkmale.
    • KURZE BESCHREIBUNG DER BEIGEFÜGTEN ZEICHNUNG
  • Nun wird eine bevorzugte Ausführungsform der vorliegenden Erfindung im einzelnen unter speziellem Bezug auf die beigefügte Zeichnung beschrieben; darin zeigen:
  • Fig. 1 einen Querschnitt durch einen Induktor; und
  • Fig. 2, wie das Verpackungsmaterial durch Verwendung eines Induktors nach der vorliegenden Erfindung versiegelt wird.
  • Die Zeichnung zeigt nur diejenigen Einzelheiten, die für das Verständnis der vorliegenden Erfindung wesentlich sind, wobei die Anordnung des Induktors in einer Füllmaschine (womit der Fachmann vertraut ist) ausgelassen ist.
    • BESCHREIBUNG DER BEVORZUGTEN AUSFÜHRUNGSFORM
  • In Fig. 1 ist ein Induktor 1 nach der Erfindung gezeigt. Der Induktor 1 weist drei im wesentlichen parallele Leiter 2, 3 auf, die in einer elektrisch leitenden Trägerschicht 4 angeordnet sind, die in ihrem Inneren einen Kern 5 aus einem Ferritmaterial aufnimmt. Der Kern 5 aus Ferritmaterial ist gegen die drei Leiter 2, 3 isoliert. Beide äußeren Leiter 2 weisen einen sanft abgerundeten Querschnitt oder alternativ einen quadratischen oder rechteckigen Querschnitt auf. Beide äußeren Leiter 2 nehmen im Inneren Kühlleitungen 6 auf, die für ein Kühlmittel bestimmt sind. Der zentrale Leiter 3 ist im wesentlichen U- förmig gestaltet. Jeder Leiter weist an seiner Oberseite 7 einen Wulst oder eine Rippe 14 auf, die etwa um 0,3 mm über die Umgebungsfläche 7 vorsteht.
  • Die drei Leiter 2 und 3 sind bevorzugt mit einer (nicht gezeigten) Hochfrequenzwechselstromquelle parallelgeschaltet. In einem solchen Fall läßt sich in dem zentralen Leiter 3 eine deutlich höhere Stromkraft erreichen; wegen der Ausgestaltung des zentralen Leiters 3 (mit dem nach oben offenen U) erhält man allerdings einen Induktor 1, dessen drei Leiter 2, 3 alle in etwa die gleiche Stromdichte an der Oberseite 7 aufweisen.
  • Der Induktor 1 nach der vorliegenden Erfindung kann auch in Reihe oder mittels eines Kondensators induktiv geschaltet sein.
  • Der Induktor 1 ist durch einen Stahlkörper 8 verstärkt, und der gesamte Induktor 1 ist in einer Versiegelungsbacke 9 angeordnet, der die gewünschte Versiegelungsbewegung verliehen werden kann und die den gewünschten Versiegelungsdruck ausüben kann. Die Versiegelungsbacke 9 ist so zu betreiben, daß sie sich zu einer ebenfalls beweglichen Gegenbacke 10 bewegt. Das quer zu versiegelnde Verpackungsmaterial 11 wird zwischen der Versiegelungsbacke 9 und der Gegenbacke 10 vorgeschoben. Das Verpakkungsmaterial 11 ist zwischen den beiden Backen 9 und 10 derart angeordnet, daß zwei Thermoplastschichten 12, die miteinander verschmolzen oder versiegelt werden sollen, zueinander orientiert sind.
  • Bewegen sich die beiden Versiegelungsbacken 9 und 10 zueinander und fangen dazwischen das Verpackungsmaterial 11, das querversiegelt werden soll, dann wird in drei im wesentlichen parallelen Versiegelungslinien eine Versiegelung erzeugt, wobei die mittlere die breiteste ist. Werden die beiden Versiegelungsbakken 9 und 10 zueinandergedrückt, dann üben die an den Leitern angeordneten Rippen 14 lokal eine etwas stärkere Druckkraft aus und tragen dazu bei, eine zuverlässigere und dichtere Versiegelung des Verpackungsmaterials 11 zu schaffen Das Verpackungsmaterial 11 soll in der mittleren Versiegelungsverbindung oder -naht dadurch zertrennt werden, daß sich ein in der beweglichen Gegenbacke 10 angeordnetes Messer 13 nach unten durch das Material 11 in die U-förmige Nut des zentralen Leiters 3 bewegt.
  • Nach dem Querversiegeln unter Verwendung eines Induktors 1 nach der vorliegenden Erfindung werden möglicherweise vorhandene Produktrückstände zwischen der Querversiegelung der äußeren Leiter 2 und der Querversiegelung des zentralen Leiters 3 eingeschlossen. Damit werden möglicherweise vorhandene Produktrückstände in einem Material eingeschlossen, das so aseptisch wie die restliche Packung ist; damit können die Behälter durchaus mit Produkten gefüllt werden, die beispielsweise Fasern, Fruchtsamen oder Kerne enthalten. Die an der zentralen Versiegelungsverbindung oder -naht abgetrennte Packung weist keine Versiegelungsrippe auf, wo sich Produkte sammeln können.
  • Aus der vorhergehenden Beschreibung wird deutlich, daß die vorliegende Erfindung eine Vorrichtung zum Querversiegeln von Verpackungsrohlingen realisiert, wobei beim Abtrennen der Verpakkungsrohlinge keine Versiegelungsrippe oder -klappe erzeugt wird. Damit läßt sich eine Querversiegelung erhalten, die gut zum Einfüllen von Produkten geeignet ist, die hochviskos sind oder Teilchen wie Fruchtsamen, Kerne oder Fasern enthalten.
  • Die vorliegende Erfindung sollte nicht als auf das oben Beschriebene und in den Zeichnungen Gezeigte begrenzt angesehen werden; viele Änderungen sind möglich, ohne den Umfang der beigefügten Ansprüche zu verlassen.

Claims (9)

1. Vorrichtung zum Versiegeln eines thermoplastbeschichteten Materials (11) mit wenigstens einer Schicht aus einer Metallfolie, bevorzugt Aluminium, wobei die Vorrichtung einen Induktor (1) aufweist, der mit einer Hochfrequenzstromquelle verbunden werden kann und im wesentlichen parallele, etwas voneinander beabstandete Leiter (2, 3), einen Kern (5) aus Magnetmaterial sowie einen elektrisch isolierenden Trägerabschnitt (4) aufweist, dadurch gekennzeichnet, daß die Zahl der Leiter (2, 3) drei beträgt, die derart angeordnet sind, daß die Stromdichte in den Leitern (2, 3) etwa gleich ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der mittlere (3) der drei Leiter (2, 3) mit einer im wesentlichen U-förmigen Nut versehen ist.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2, 3) parallelgeschaltet sind.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2, 3) in Reihe geschaltet sind.
5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2, 3) induktiv verbunden sind.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Leiter (2, 3) mittels eines Kondensators induktiv geschaltet sind.
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Induktor (1) in einer Versiegelungsbacke (9) angeordnet ist, die dazu bestimmt ist, daß sie gegen eine Gegenbacke (10) gepreßt wird, während das zum Versiegeln bestimmte Material zwischen den Backen (9, 10) aufgenommen wird.
8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Leiter (2, 3) in Längsrichtung leicht vorstehende Rippen (14) aufweisen, längs derer die Druckkraft gegen den zum Versiegeln bestimmten Abschnitt des Verpackungsmaterials (11) lokal verstärkt wird.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Rippen (14) eine Höhe von etwa 0,3 mm aufweisen.
DE69401554T 1993-09-08 1994-09-07 Eine Vorrichtung für das Abdichten von thermoplastoberflächenbelegtes Verpackungsmaterial Expired - Lifetime DE69401554T2 (de)

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SE9302894A SE501712C2 (sv) 1993-09-08 1993-09-08 Anordning för försegling av termoplastbelagt förpackningsmaterial

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EP (1) EP0642914B1 (de)
JP (1) JP3631268B2 (de)
AT (1) ATE148026T1 (de)
BR (1) BR9403474A (de)
DE (1) DE69401554T2 (de)
DK (1) DK0642914T3 (de)
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Publication number Publication date
SE501712C2 (sv) 1995-05-02
ES2098087T3 (es) 1997-04-16
EP0642914B1 (de) 1997-01-22
ATE148026T1 (de) 1997-02-15
BR9403474A (pt) 1995-05-16
DK0642914T3 (da) 1997-02-10
JPH07164524A (ja) 1995-06-27
GR3022369T3 (en) 1997-04-30
US5649407A (en) 1997-07-22
DE69401554D1 (de) 1997-03-06
SE9302894D0 (sv) 1993-09-08
EP0642914A1 (de) 1995-03-15
SE9302894L (sv) 1995-03-09
JP3631268B2 (ja) 2005-03-23

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