EP0963317A1 - Procede et dispositif de scellement par induction - Google Patents

Procede et dispositif de scellement par induction

Info

Publication number
EP0963317A1
EP0963317A1 EP98912340A EP98912340A EP0963317A1 EP 0963317 A1 EP0963317 A1 EP 0963317A1 EP 98912340 A EP98912340 A EP 98912340A EP 98912340 A EP98912340 A EP 98912340A EP 0963317 A1 EP0963317 A1 EP 0963317A1
Authority
EP
European Patent Office
Prior art keywords
sealing
induction
container
containers
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98912340A
Other languages
German (de)
English (en)
Inventor
Heinz-Rudolf Wiening
Horst Trombach
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.)
Alfelder Kunststoffwerke Herm Meyer GmbH
Original Assignee
Alfelder Kunststoffwerke Herm Meyer GmbH
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 Alfelder Kunststoffwerke Herm Meyer GmbH filed Critical Alfelder Kunststoffwerke Herm Meyer GmbH
Publication of EP0963317A1 publication Critical patent/EP0963317A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—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
    • B29C65/3644—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 ribbon, band or strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24249—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a specific polygon not provided for in B29C66/24241 - B29C66/24243
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/227—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by induction welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being elliptical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—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

Definitions

  • the invention relates to a sealing device for sealing non-circular, in particular polygonal, such as quadrangular, hexagonal, octagonal or elliptical container openings, one or more induction loops being provided for sealing and the induction loops being adapted to the shape of the sealing edge, and a method for sealing such container openings as well as a sealing washer used.
  • containers For the economical stacking of containers, they are preferably produced as non-round cans, in particular square cans, for example for cocoa powder. As a result, more rectangular cans can be accommodated on the same footprint than when round cans are provided. The latter are preferred during production.
  • these glass containers are not suitable for storing light-sensitive products, such as cocoa or espresso powder. These would decompose in the glass containers if exposed to light or would be exposed to other adverse effects. It is therefore known to use a specific type of opaque plastic container for such products. But it turns out to be problematic to stick on the upper peripheral edge of these plastic container films. For example, known films do not adhere sufficiently reliably or not at all to an HDPE plastic (high density polyethylene).
  • HDPE plastic high density polyethylene
  • a device is known from EP 0 223 517 B1, by means of which containers made of a plastic material are sealed with a closure lid also made of plastic and a metallic layer by induction.
  • the induction loop used in the device has a shape corresponding to the edge to be sealed. It contains at least one corner shape.
  • a ferrite current concentrator unit is arranged in this. The induction loop engages with a surface in the lid for sealing. The ferrite current concentrator is arranged next to the induction loop.
  • the invention has for its object to provide a method and an apparatus for induction sealing of non-circular, in particular polygonal, such as quadrangular, hexagonal, octagonal or elliptical container openings, which enables many sealing processes per unit of time with little effort, with a perfect sealing especially is guaranteed in the corners.
  • non-circular, in particular polygonal such as quadrangular, hexagonal, octagonal or elliptical container openings
  • This object is for a sealing device for sealing non-round, in particular polygonal, such as four, six, octagonal or elliptical container openings, one or more induction loops being provided for sealing and the induction loops having the shape of the sealing edge are adapted, solved in that the induction loops are dimensioned in such a way that a homogeneous field for the sealing, which is adapted to the dimensions of the sealing edge, is created, that means for clockwise or speed-parallel control of the induction loops with respect to the movement of the containers or means for creating a compensation of the The speed of production of the containers during the sealing with respect to the induction loops is provided and that means are provided for the time control of the belts transporting the containers and the pressing and sealing process and for a possible pressure setting during the sealing process.
  • the object is achieved in that the containers are stopped to ensure a constant distance between the sealing edge and the induction loop during the induction process, either to create a dwell time or induction loop and sealing edge are moved in synchronism or the same speed, that the induction loops or pressure stamps with induction loops are lowered from above onto closures of the containers with sealing washers, that induction sealing is carried out by applying a predetermined pressure or without pressure, that the induction loops or the or the pressure stamps are raised after the induction sealing and that the containers are carried out of the sealing device.
  • a sealing disc used for the sealing which is non-round, in particular polygonal or elliptical and has at least one metal foil and on its underside facing the container a layer of a sealing material adapted to the container material
  • the object is achieved in that a seal in the container arranged laminated upper part of the sealing washer is provided, and that the metal foil facing the closure is covered by a layer of paper or thin foam film or by a layer of wax, pressure sensitive adhesive or polyethylene and is connected to the upper part of the sealing washer.
  • the distance between the induction loop and the sealing edge is preferably adjustable or selectable depending on the shape, size and material of the sealing edge and / or sealing disc.
  • the induction loops are advantageously bent in the same shape and dimension as the upper circumferential seal edge of the container.
  • the sealing process takes place either without pressure or under pressure. In the latter case, the sealing disk is pressed against the sealing edge either by the closure of the container or by a pressure stamp.
  • the induction loops are preferably provided in the pressure stamp or stamps. In addition to the printing stamps or exclusive lent, so be provided without additional stamps.
  • a large pressure stamp is preferably provided in the sealing device, with induction loops provided next to one another, corresponding to the spacing of containers which are preferably guided in parallel during the induction process.
  • a plurality of pressure stamps arranged side by side or one behind the other with appropriately dimensioned induction loops can also be arranged.
  • the induction loops are preferably arranged one behind the other when they are moved with them at the same cycle and / or at the same speed as the containers on a conveyor belt.
  • the sealing edges of the containers are preferably already each provided with a correspondingly dimensioned sealing washer and a closure. However, they can also be provided with a closure and sealing washer only in or in the area of the sealing device.
  • the pressure stamps are lowered onto the containers with the induction loops under a certain pressure.
  • the pressure stamp preferably presses a metal foil provided in the sealing washer as a so-called antenna or means for producing the induction seal in connection with a sealing layer on the upper peripheral edge of the container.
  • the metal foil adheres to the upper circumferential sealing edge of the container.
  • the connection of the metal foil and the circumferential sealing edge is the same at every point of the upper circumferential edge of the container.
  • Optimal sealing with the film also takes place at corners of the container opening, since the field created by the induction loop is precisely adapted to the dimensions of the upper circumferential sealing edge of the container and is homogeneous.
  • a double turn of the induction loop is preferably provided.
  • the distance between the induction loop and the sealing edge can also preferably be selected depending on the shape, size and material of the sealing edge and / or sealing disk.
  • An adaptation to different dimensions and shapes of container openings takes place by providing a range of different induction loops, in particular integrated in pressure stamps, with corresponding dimensions and shapes. If the container edge shapes and dimensions are changed, the induction loops or induction loops with pressure stamp are then completely replaced. After the sealing process, the induction loop or the pressure stamp or the pressure stamp is moved upwards away from the containers.
  • a drive device transports the containers out of the sealing device, in particular after a previous parallel guidance in order to create a dwell time and to compensate for the production speed, in a row.
  • Means are particularly preferably provided for the induction loops for setting a predeterminable current to create an adapted, homogeneous field, for the pressure stamp means are provided for setting a predefinable pressure acting during the induction process.
  • Control devices are preferably provided for the time control of the conveyor belts, the pressing and sealing process and for possible pressure adjustment during the sealing process.
  • a thermoplastic material in particular polymers such as polypropylene, polyester, PVC or the like, or particularly preferably HDPE (high density polyethylene) or also glass, can preferably be provided as the material for the container.
  • the sealing disks In addition to the metal foil, in particular aluminum foil, and the sealing layer, which is arranged in the container pointing towards the product, the sealing disks have a layer of paper, thin foam foil or wax, pressure-sensitive adhesive or polyethylene in the direction of the container closure, that is, below the upper part of the sealing washer.
  • the latter is preferred made of polyethylene or polypropylene foam, laminated, or made of laminated cardboard.
  • Figure 1 is a sectional view of a container with a sealing washer, closure and induction loop according to the invention with a pressure stamp;
  • FIG. 2 shows a plan view of the partially cut open pressure stamp with an induction loop according to FIG. 1;
  • Figure 3 is a plan view of a second embodiment of an induction loop according to the invention with a container;
  • Figure 4 is a side view of the sealing process according to the invention with parallel movement of the container and induction loop;
  • Figure 5 is a perspective schematic diagram of a sealing device according to the invention with branching of the feed belt to create a residence time.
  • FIG. 1 shows a sectional view through a first embodiment of an induction loop 11 according to the invention in a pressure stamp 10.
  • the pressure stamp 10 is provided for receiving an induction loop 11.
  • the induction loop 11 is formed as a double turn. This avoids the disadvantage that a slight inhomogeneity arises in the case of induction loops with only one turn in the area of the supply and discharge for the current.
  • the inlets and outlets for the current are indicated for the double turns of the induction loop 11 by the reference numerals 12 and 13.
  • a sealing disk 15 is arranged on the upper edge of the container as the sealing edge 14 of the container 2.
  • the sealing disk 15 has three layers.
  • a sealing layer 9, above which a metal foil 16, for example an aluminum foil, is provided against the upper container edge 14.
  • the sealing layer 9 preferably covers the entire metal foil 16. It melts during the sealing process in the area of the sealing edge 14 and therefore consists of a sealing material that is matched to the container material.
  • a layer 18 is provided as the upper part of the sealing disk 15 made of a sealing material. This layer 18 lies in the closure. It preferably consists of polyethylene or propylene foam and is advantageous, laminated at least on the side facing the metal foil. Alternatively, the layer 18 can also consist of laminated cardboard.
  • This layer 18 is inserted directly into the closure 3 and is attached to its inner surface 19.
  • a layer 17 is arranged between the metal foil 16 and the layer 18. It preferably consists of a thin layer of paper and thin foam sheet. Alternatively, it can also consist of wax, pressure sensitive adhesive or polyethylene. Layer 17 serves as a connection to layer 18.
  • the container 2 is filled with a product 20.
  • a product 20 can be, for example, cocoa or espresso powder, a milk or protein product or other.
  • the sealing layer 9 should be made of a material that does not affect the quality of the product in the container 2.
  • the layers 17 and 18 are provided in the closure 3 of the container 2. These layers are therefore also preferably made of a material which does not react with the product in the container or has other negative effects on the product.
  • the induction loop 11 is provided in exactly above the upper container edge or sealing edge 14. It is integrated in the pressure stamp 10 in such a way that it connects the film 16 to the upper container edge 14 by melting in the current-carrying state by induction. In order to ensure that the film 16 does not lie on the upper circumferential container edge 14 in a wrinkle-free and secure manner, the pressure stamp 10 is subjected to a predeterminable pressure p. This pressure can be set in a predeterminable order of magnitude on setting means, not shown. The respective pressure time is also specified. The pressure stamp 11 is then moved away from the closure 3 of the container 2 while the power supply to the induction loop is switched off.
  • FIG. 2 shows a top view of the pressure stamp 10 according to FIG. 1.
  • the pressure stamp 10 is shown cut open to make the positioning of the induction loop 11 visible.
  • the induction loop 11 is aligned above the upper container edge 14 of the container 2, which is indicated by a line.
  • plate-shaped induction fields are usually used for induction sealing. These plate-shaped induction fields are generated in a plate by a coil bent in the form of a wavy line. Since in the case of circular openings there are the same paths to the respective outer edge of the container opening, a uniform sealing takes place in the entire area of the upper peripheral edge of the container.
  • pressure stamps 10 of different sizes By providing an assortment of pressure stamps 10 of different sizes with induction loops 11 of different dimensions, accordingly the respective dimensions of the container edges 14 to be sealed with appropriately dimensioned sealing disks 15, a quick adjustment is possible by changing the corresponding pressure stamp 10 during operation.
  • pressure stamps each with a plurality of induction loops arranged next to one another in different dimensions, can also be provided.
  • a latching mechanism can be provided in the sealing device for latching in the corresponding pressure stamp or the corresponding pressure stamp.
  • FIG. 3 shows a plan view of a second embodiment of an induction loop according to the invention with a container arranged underneath.
  • the container 2 has an octagonal shape, as does its upper circumferential sealing edge 14. This is indicated by a line in FIG. 3.
  • the induction loop 38 is arranged above this sealing edge 14 on the container closure 3.
  • no pressure stamp is provided in the embodiment according to FIG. 3.
  • the induction loop 38 is provided without a stamp. It is placed over the container closed with a closure and seals the sealing edge 14 with a sealing washer without exerting pressure on the closure itself. The required pressure is already provided by the closure screwed onto the container opening. Further pressure generation is therefore no longer required for the sealing process.
  • the induction process can also be carried out completely without pressure.
  • the sealing washer is not pressed onto the sealing edge by the closure. However, your sealing layer melts with the sealing edge of the container during the sealing process.
  • the induction loop is arranged at a suitable distance from the sealing edge, and the homogeneous field generated by it is suitably adapted to the shape, size and material to be melted.
  • FIG. 3 A corresponding sealing process with container and induction loop according to FIG. 3 is shown in FIG.
  • the containers 2 are set up on a conveyor belt 30 and are moved by this. The direction of movement is shown by arrows.
  • the holders 29 with the induction loops 38 descend from above onto the closures 3 of the containers 2. They then follow the movement of the containers in parallel during the sealing process. This is also indicated with an arrow in FIG. 4.
  • a pressure stamp with an induction loop as shown in Fig. 1 or 2
  • the pressure stamp with the induction loop descends onto the container with closure 3.
  • the pressure on the closure is applied simultaneously with the movement parallel to the movement of the containers. The sealing process then takes place as previously described.
  • either the induction loop 38 in the holder 29 or a pressure stamp 10 with induction loop 11 is moved up again from the closure 3 of the containers 2, so that the completely sealed containers can be further processed in the further production process.
  • FIG. 5 shows a perspective schematic diagram of an induction sealing device according to the invention with a branched feed belt 31.
  • Three containers 2 are arranged in a row on a feed belt 31.
  • the containers are each provided with a closure 3. On the upper circumferential edge of the respective container, that is, below the closure, sealing disks are not visible.
  • the feed belt 3 branches at the branching point A into three belts 34, 35, 36. On these three belts 34, 35, 36, three containers 2 with attached closures 3 are arranged in parallel.
  • a pressure stamp 37 is provided above the three containers. This is indicated by dashed lines in Figure 5.
  • Induction loops 41 are provided in the pressure stamp 37 above each container.
  • the induction loops 41 have dimensions corresponding to the dimensions of the containers 2 and their closures 3.
  • the induction loops 41 are also indicated in FIG. 5 only by dash-dotted lines.
  • the pressure stamp 37 is lowered onto the closures 3. He then presses the locks with a pre-definable pressure. At the same time, the induction loops are supplied with current. This results in an optimal induction sealing of the container 2.
  • the pressure stamp 37 is moved up again away from the container closures 3.
  • the induction loops are no longer supplied with current.
  • a control device sets the containers which had been stopped during the sealing process on the belts 34, 35, 36 in motion again.
  • the containers 2 are guided back in series onto a conveyor belt 39 via the branching point B.
  • the respective transport direction of the belts 31, 34, 35, 36, 39 is indicated by arrows.
  • the containers 2 come on the feed belt 1 from a filling device and a device in which they are provided with the sealing washers and closures. After leaving the sealing device, the finished sealed containers on the conveyor belt 39 reach, for example, a packaging department.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Closures For Containers (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)

Abstract

Le dispositif proposé de scellement d'ouvertures non circulaires de conteneurs, notamment d'ouvertures de forme polygonale - tétragonale, hexagonale, octagonale ou elliptique -, contient une ou plusieurs boucles d'induction (11, 38, 41) aux fins du scellement. Les conteneurs (2) comprennent des dispositifs de fermeture (3) à disques d'étanchéité que l'on adapte sur le bord de jonction (14) de l'ouverture du conteneur. Les boucles d'induction (11, 38, 41) sont adaptées à la forme du bord de jonction (14), et l'espace entre la boucle d'induction (11, 38, 41) et le bord de jonction (14) est réglable et sélectionnable en permanence.
EP98912340A 1997-02-21 1998-02-19 Procede et dispositif de scellement par induction Withdrawn EP0963317A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19707007 1997-02-21
DE19707007A DE19707007A1 (de) 1997-02-21 1997-02-21 Vorrichtung und Verfahren zur Induktionsversiegelung
PCT/EP1998/000957 WO1998036969A1 (fr) 1997-02-21 1998-02-19 Procede et dispositif de scellement par induction

Publications (1)

Publication Number Publication Date
EP0963317A1 true EP0963317A1 (fr) 1999-12-15

Family

ID=7821109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98912340A Withdrawn EP0963317A1 (fr) 1997-02-21 1998-02-19 Procede et dispositif de scellement par induction

Country Status (18)

Country Link
US (1) US6362461B1 (fr)
EP (1) EP0963317A1 (fr)
JP (1) JP2000516563A (fr)
CN (1) CN1248210A (fr)
AU (1) AU744648B2 (fr)
BR (1) BR9807448A (fr)
CA (1) CA2282242C (fr)
DE (1) DE19707007A1 (fr)
EE (1) EE9900358A (fr)
HU (1) HUP0000975A2 (fr)
IL (1) IL131487A0 (fr)
IS (1) IS5156A (fr)
NO (1) NO993963L (fr)
PL (1) PL335364A1 (fr)
SK (1) SK113499A3 (fr)
TR (1) TR199902007T2 (fr)
UA (1) UA63942C2 (fr)
WO (1) WO1998036969A1 (fr)

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WO2013009226A1 (fr) * 2011-07-11 2013-01-17 Å&R Carton Lund Ab Appareil et procédé pour rendre étanche un réceptacle à base de carton
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Also Published As

Publication number Publication date
CA2282242C (fr) 2004-02-03
TR199902007T2 (xx) 2000-01-21
NO993963D0 (no) 1999-08-17
CN1248210A (zh) 2000-03-22
EE9900358A (et) 2000-02-15
BR9807448A (pt) 2000-04-25
IL131487A0 (en) 2001-01-28
PL335364A1 (en) 2000-04-25
SK113499A3 (en) 2000-05-16
WO1998036969A1 (fr) 1998-08-27
AU744648B2 (en) 2002-02-28
JP2000516563A (ja) 2000-12-12
UA63942C2 (uk) 2004-02-16
NO993963L (no) 1999-10-20
DE19707007A1 (de) 1998-08-27
CA2282242A1 (fr) 1998-08-27
US6362461B1 (en) 2002-03-26
IS5156A (is) 1999-08-17
AU6722098A (en) 1998-09-09
HUP0000975A2 (en) 2000-07-28

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