WO2007094662A1 - dispositif de jonction de bandes de matériau de film plastique - Google Patents

dispositif de jonction de bandes de matériau de film plastique Download PDF

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Publication number
WO2007094662A1
WO2007094662A1 PCT/NL2007/000044 NL2007000044W WO2007094662A1 WO 2007094662 A1 WO2007094662 A1 WO 2007094662A1 NL 2007000044 W NL2007000044 W NL 2007000044W WO 2007094662 A1 WO2007094662 A1 WO 2007094662A1
Authority
WO
WIPO (PCT)
Prior art keywords
foil
seam
stamp
anvil
strips
Prior art date
Application number
PCT/NL2007/000044
Other languages
English (en)
Inventor
Pieter Jan De Roij
Original Assignee
Smulders Machine- En Apparatenbouw B.V.
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 Smulders Machine- En Apparatenbouw B.V. filed Critical Smulders Machine- En Apparatenbouw B.V.
Publication of WO2007094662A1 publication Critical patent/WO2007094662A1/fr

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Classifications

    • 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
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • B29C65/223—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire comprising several heated wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/224—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip being a resistive ribbon, a resistive band or a resistive strip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—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
    • B29C66/40—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
    • B29C66/80—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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81469—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed next to the other in a single line transverse to the feed direction, e.g. shoulder to shoulder sonotrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • 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
    • 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
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/026—Enclosing successive articles, or quantities of material between opposed webs the webs forming a curtain
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations

Definitions

  • the invention relates to a device for joining strips of plastic foil material so as to obtain at least one foil seam, comprising supply means for supplying the two overlapping strips of foil material to a joining position, as well as joining means made up of at least one assembly consisting of at least one stamp element and at least one anvil element, which at least one stamp element and at least one anvil element are each disposed on either side of the joining position and which can be brought into abutment with each other for the purpose of forming said at least one foil seam.
  • Such a device is generally known, it is used in the packaging industry, where products are to be packaged or enveloped in foil material.
  • one or two strips of foil material are wound around the product in an automated process, after which the two overlapping strips of foil material are joined together at the location of a joining position in the device by joining means which are known per se, for example by means of a heating filament.
  • a drawback of the devices that are currently known is that in order to form a foil seam between the two strips of foil material, the stamp element that forms part of the joining means and the anvil element that cooperates therewith have a constructional length dimension such that the quality of foil seam to be formed, and in particular the bond along the entire length of the foil seam between the two strips of foil material, is adversely affected thereby. This is especially the case with foil seams of considerable length, when the stamp element and the anvil element to be brought into abutment with each other deform under the influence of gravity and thus do not abut each other properly along the entire length of the foil seam to be formed.
  • the incomplete abutment of the anvil element and the stamp element caused by deformation or sagging results in a foil seam that locally exhibits a weak bond or, in the worst case, no bond at all between the strips of foil material.
  • the foil seam thus realised is of a lesser quality and may come loose locally as a result of the poor bond between the two strips of foil material.
  • a locally incorrect abutment or poor bond of the two strips of foil material will lead to a "leaky" foil seam, which is undesirable in those cases in which the product in question must be hermetically sealed in the foil material.
  • the object of the invention is to obviate the above drawbacks and to provide a device according to the introductory paragraph by means of which improved foil seams can be formed between the foil material, which strips of foil material are joined along the entire length of the foil seam, so that the foil seam that is obtained in this manner will not only be stronger, and will thus come loose less easily, but which above all will be hermetically sealed without any "leaking", incorrectly abutting strips of foil material.
  • the device is characterised in that abutment means are provided, which, in order to form said at least one foil seam, aid in achieving a full abutment of said at least one stamp element and said at least one anvil element against each other along the entire length of the foil seam to be formed.
  • abutment means are provided, which, in order to form said at least one foil seam, aid in achieving a full abutment of said at least one stamp element and said at least one anvil element against each other along the entire length of the foil seam to be formed.
  • the abutment means form part of said at least one stamp element and/or said at least one anvil element, and in a special embodiment the abutment means comprise several magnets disposed along the entire length dimension of said at least one stamp element and/or said at least one anvil element.
  • said at least one stamp element and said at least one anvil element in particular have a length dimension which is at least equal to the length dimension of the foil seam to be formed.
  • the quality of the foil seam to be formed, at least along the entire length thereof, is further ensured in that said at least one stamp element can be moved into abutment with said at least one anvil element against a return force. In this way the two strips of foil material are clamped together with a constant force along the length of the foil seam, which leads to a foil seam that will not exhibit any weak points.
  • said at least one stamp element is mounted on a support that can be moved along a guide.
  • a spring element which bears on the support may be arranged around the guide in that case.
  • said at least one stamp element and said at least one anvil element are arranged for forming two foil seams extending parallel to each other.
  • Said at least one stamp element may that case be made up of two stamp element members extending parallel to each other. More specifically, a cutting element may be disposed between the two stamp element members. In this way two parallel foil seams can be formed in one operation, which foil seams can moreover be separated from each other in the same operation.
  • said at least one anvil element is made up of two parallel anvil element members that co-operate with corresponding stamp element members, whilst a stop element that co-operates with the cutting element may be disposed between the two anvil element members.
  • each anvil element member comprises a clamping element for clamping the two strips of foil material together and a seam forming element for forming the foil seam.
  • the seam forming elements may be provided with a heating filament in that case.
  • Figure 1 is a view of an embodiment of a device according to the invention.
  • Figure 2 is a larger-scale view of the joining means according to the invention.
  • Figure 3 is another larger-scale view of the joining means according to the invention.
  • Figure 4 is a view of another embodiment of a device according to the invention.
  • Figure 1 shows an embodiment of a device 10 according to the invention for joining two strips of foil material 8a-8b (see figure 3) so as to obtain a foil seam.
  • a device 10 for joining two strips of foil material 8a-8b (see figure 3) so as to obtain a foil seam.
  • Such a device is used in particular for enveloping various products
  • 5-5'-5 which may be supplied to a joining position 6 in the device 10 by specific supplying means 20, in strips of foil material.
  • the products 5-5'-5 for example boxes, may have considerable dimensions.
  • Said products 5-5'-5" are supplied to the joining position 6 via a working surface 11 by means 20 consisting of an endless carrier 21 that is passed over rollers 22a-22b, of which the roller 22a can be driven by means of a drive unit 23 that is known per se, for example an electric motor.
  • joining means 30 are provided at the location of the joining position 6.
  • the joining means 30 are made up of at least one assembly, which consists of at least one stamp element 31 and one anvil element 32, which are disposed on either side of the joining position 6 and which can be moved towards and away from each other by suitable moving means.
  • the stamp element 31 is movably mounted in the device 10.
  • Guides 33 are to that end disposed in the device, between which guides the stamp element 31 is movably provided.
  • the stamp element 31 can be moved towards and away from the anvil element by suitable moving means, for example an endless carrier 34 that is passed over two or more rollers 35a-35b, of which the roller 35a can be driven by a drive unit 36 that is known per se (for example an electric motor).
  • suitable moving means for example an endless carrier 34 that is passed over two or more rollers 35a-35b, of which the roller 35a can be driven by a drive unit 36 that is known per se (for example an electric motor).
  • the strips of foil material 8a-8b present therebetween are pressed together and, using heat, for example, fused together so as to obtain a foil seam.
  • the joining means 30 and in particular the stamp element 31 and the anvil element 32 may have a considerable constructional length dimension.
  • a drawback of this known construction is the fact that the stamp element 31 and/or the anvil element 32 may sag, and consequently deform, under the influence of their weight and gravity. As a result, the stamp element 31 and the anvil element 32 will not abut each other properly along their entire length, which corresponds to the length of the foil seam to be formed), so that the two strips of foil material 8a-8b will not be pressed together properly, either, resulting in a reduced quality of the foil seam thus realised, which may easily come loose.
  • the stamp element 31 can be moved towards and away from the stationary anvil element 32.
  • the stamp element 31 comprises a girder 310, which can be moved along the guide 33 of the device 10 with its ends 310a-310b (see also figure 1 ).
  • the movement of the girder 310 is effected by the moving means 34-35a-35b-36 as shown in figure 1.
  • the joining means 30 are built up of two assemblies, each consisting of a stamp element 311a and 311 b and an anvil element 321 a and 321 b, respectively. Using this construction, two separate foil seams can be formed simultaneously in separate strips of foil material. It will be apparent, however, then it is also possible to use an embodiment of the device according to the invention in which the joining means 30 comprise only one stamp element 311 a and one anvil element 321a.
  • the device is provided with abutment means 50, which ensure that the stamp element 31 and the anvil element 32 abut each other along the entire length of the foil seam to be formed between the strips of foil material.
  • the abutment means 50 consist of magnets, which are provided along the entire length (longitudinal direction) of the anvil element 32.
  • the magnets 50 may also be provided on the stamp element 31 in a similar manner.
  • the abutment means which ensure that the stamp element 31 and the anvil element 32 will fully abut each other (along the entire length of the foil seam to be formed), comprise magnets 50, which form part of the anvil element 32 in this embodiment. In another embodiment, however, the abutment means 50 may also form part of the stamp element 31.
  • the stamp element 31 is built up of a thin, flexible strip 315, which is slightly deformable and which consequently conforms to the contour of the possibly deformed anvil element 32 when the stamp element 31 is brought into abutment with the anvil element 32 at the location of the joining position 6.
  • the abutment magnets 50 as permanent (natural) magnets, but as electromagnets.
  • the stamp element is "pressed” (or “drawn") against the anvil element and thus influence the quality (or strength) of the foil seam to be formed.
  • the magnitude of the magnetic force (using a constant force, or a variable force along the length of the foil seam) along the entire length of the foil seam to be formed.
  • the anvil element 32 is mounted on a girder 320, by which a stationary orientation of the anvil element 32 in the device 10 is realised.
  • the anvil element 32 that is mounted on the girder 320 and the stamp element 31 that is mounted on the movable girder 310 are arranged for jointly forming two parallel foil seams in the strips of foil material 8a and 8b, respectively.
  • the stamp element 31 is to that end built up of two parallel stamp element members 311 a and 31 1 b.
  • a cutting element 316 is disposed between the two stamp element members 311 a-311 b.
  • each stamp element member 31 1 a- 311 b comprises one or more supports 313, on which the elongated strip element 315a-315b is mounted.
  • the various supports 313 are movable along a guide 314. This enables the elongated strip 315a-315b to conform to the contour of the (deformed) anvil element 32.
  • an adequate abutment of the strips 315a-315b against the anvil element 32 can be realised along the entire length of the foil seam to be formed between the strips of foil material 8a-8b.
  • the strips of foil material 8a-8b are pressed together along the entire length of the foil seam to be formed, thus providing a fully sealed foil seam of uniform strength, which foil seam will not easily come loose and which does not have any weak or "leaky” spots.
  • each anvil element member 321 a-321 b is made up of a clamping element 322a-322b, respectively, for clamping the strips of foil material 8a-8b against the strip 315a-315b that forms part of each stamp element member 31 l a- Si b.
  • each anvil element member 321 a-321 b is provided with a seam forming element 323a-323b, respectively, which cooperates with the clamping element 322a-32b, which seam forming element likewise clamps the two strips of foil material 8a-8b between the strips 315a-315b and forms the foil seam by means of heat, for example by using a heating filament 324a-324b extending in the longitudinal direction. Also other methods of forming the foil seam by means of heat are possible, however, for example by using ultrasound.
  • the function of the two clamping elements 322a-32b is to orient or fix the two strips of foil material 8a-8b in place relative to each other and relative to the seam forming elements 323a-323b so as to prevent the strips of foil material from shifting or coming loose, which might lead to an incorrectly formed foil seam.
  • each stamp element 31 is mounted on a support 313 which is movable along a guide 314. Said movement of the stamp element 31 takes place against a return force, which may for example be provided by a spring element 317, which is arranged around the guide 314 and which is confined between the support 313 and the girder 310 that more or less forms part of the fixed structure (but which is movable within the device).
  • a return force which may for example be provided by a spring element 317, which is arranged around the guide 314 and which is confined between the support 313 and the girder 310 that more or less forms part of the fixed structure (but which is movable within the device).
  • the moving means 34-35a-35b-36 move the girder 310 along the guides 36 in the device 10 towards the anvil element 32, which is fixedly disposed in the device 10.
  • the two strips of foil material 8a-8b are clamped between the strips 315a-31 b and the corresponding clamping elements 322a-32b and the seam forming elements 323a- 32b.
  • a further movement in the direction of the anvil element 32 is imparted to the girder 310.
  • the two stamp element members 311a-311 b will at the same time move along the guide 314 against the spring force of the spring element 317.
  • the cutting element 316 will move in the direction of the strips of foil material 8a-8b, cutting the strips through at the location indicated C between the foil seams A-B that have been formed.
  • a stop element 326 is to that end provided between the two anvil element members 321a-321 b. Then the girder 310 is moved upwards in the device 10, thereby moving the stamp element away from the anvil element 32. In this way space is created for discharging the product 5, which is now enveloped in foil material that has been joined at the location of the foil seam B.
  • the joined strips of foil material 8a-8b at the location of the foil seam A can now be arranged around the next product 5'.
  • the girder 310 is moved downwards together with the stamp element 31 in the direction of the anvil element 32 for forming the end part a seam B (for product 5') and the first part of a seam A (for the next product 5") in one operating step.
  • the two foil seams A and B are separated from each other by means of the cutting element 316.
  • FIG 4 shows another embodiment of a device according to the invention, in which, in contrast to the embodiment as shown in figure 3, both the stamp element and the anvil element are single elements.
  • the stamp element is provided with one single flexible strip 315, which can be placed on the (likewise single) anvil 320.
  • the flexible strip will be deformed under the influence of the abutment means or the magnets 50 upon forming the foil seam so as to effect a full abutment against the anvil 320 in this manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif de jonction de bandes de matériau de film plastique (8a, 8b) permettant d'obtenir au moins une couture de film, comprenant des moyens d'alimentation permettant de faire avancer les deux bandes se chevauchant de matériau de film vers une position de jonction, de même que des moyens de jonction composés d'au moins un ensemble constitué d'au moins un élément d'estampage (31) et d'au moins un élément d'enclume (32), ledit ou lesdits éléments d'estampage et ledit ou lesdits éléments d'enclume étant chacun disposés sur l'un ou l'autre côté de la position de jonction et pouvant être adossés les uns contre les autres dans le but de constituer ladite ou lesdites coutures de film. Selon l'invention, le dispositif est caractérisé en ce que des moyens d'aboutement (50) sont inclus, lesquels, pour constituer ladite ou lesdites coutures de film, contribuent au parfait aboutement dudit ou desdites éléments d'estampage et dudit ou desdites éléments d'enclume les uns contre les autres sur toute la longueur de la couture de film à constituer. De cette manière, toute déformation des moyens de jonction sur la longueur de la couture de film à constituer est compensée (ou évitée), et grâce au parfait aboutement des moyens de jonction les uns contre les autres on peut réaliser une couture de film complètement hermétique entre les deux bandes de matériau de film, ladite couture de film étant non seulement plus résistante mais se détachant également moins facilement.
PCT/NL2007/000044 2006-02-16 2007-02-15 dispositif de jonction de bandes de matériau de film plastique WO2007094662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1031167A NL1031167C2 (nl) 2006-02-16 2006-02-16 Inrichting voor het met elkaar verbinden van stroken kunststof foliemateriaal.
NL1031167 2006-02-16

Publications (1)

Publication Number Publication Date
WO2007094662A1 true WO2007094662A1 (fr) 2007-08-23

Family

ID=37057276

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Application Number Title Priority Date Filing Date
PCT/NL2007/000044 WO2007094662A1 (fr) 2006-02-16 2007-02-15 dispositif de jonction de bandes de matériau de film plastique

Country Status (2)

Country Link
NL (1) NL1031167C2 (fr)
WO (1) WO2007094662A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2015036524A1 (fr) 2013-09-13 2015-03-19 Areva Nc Soudeuse thermique à dispositif de serrage magnetique
WO2017129463A1 (fr) * 2016-01-25 2017-08-03 Tetra Laval Holdings & Finance S.A. Dispositif d'étanchéification et procédé de scellement thermique de matériau d'emballage et machine de remplissage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10351283B2 (en) 2015-12-17 2019-07-16 Khs Usa, Inc. Magnetically operated sealing bar assembly for packaging machines

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GB579147A (en) * 1945-02-24 1946-07-24 Ideal Packagings Ltd Improvements in or relating to heat sealing machines
US3713269A (en) * 1970-05-06 1973-01-30 Ikegai Iron Works Ltd Sealing equipment for a film with means for holding-up end flaps thereof
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GB2056907A (en) * 1979-08-29 1981-03-25 Pohlig Heckel Bleichert Apparatus for welding thermoplastic layers
US4768326A (en) * 1986-07-17 1988-09-06 Hayssen Manufacturing Company Bag sealing bar
EP0484998A1 (fr) * 1990-10-19 1992-05-13 Shikoku Kakoki Co., Ltd. Appareil pour le thermosoudage d'un matériau d'emballage tubulaire
EP0708023A1 (fr) * 1994-10-17 1996-04-24 Eberhard G. Heder Procédé et dispositif pour fabriquer des emballages
US5651239A (en) * 1995-03-16 1997-07-29 Shikoku Kakoki Co., Ltd. Sealing device for packaging material tube
JP2001213406A (ja) * 2000-02-02 2001-08-07 Duplo Corp 包装装置、包装方法及び包装品
US20030221773A1 (en) * 2002-06-04 2003-12-04 Jones Martin T. Apparatus and method for joining polymeric materials using an electro-magnet

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GB579147A (en) * 1945-02-24 1946-07-24 Ideal Packagings Ltd Improvements in or relating to heat sealing machines
US3713269A (en) * 1970-05-06 1973-01-30 Ikegai Iron Works Ltd Sealing equipment for a film with means for holding-up end flaps thereof
US4115182A (en) * 1977-06-29 1978-09-19 Arenco Machine Company Sealing means
GB2056907A (en) * 1979-08-29 1981-03-25 Pohlig Heckel Bleichert Apparatus for welding thermoplastic layers
US4768326A (en) * 1986-07-17 1988-09-06 Hayssen Manufacturing Company Bag sealing bar
EP0484998A1 (fr) * 1990-10-19 1992-05-13 Shikoku Kakoki Co., Ltd. Appareil pour le thermosoudage d'un matériau d'emballage tubulaire
EP0708023A1 (fr) * 1994-10-17 1996-04-24 Eberhard G. Heder Procédé et dispositif pour fabriquer des emballages
US5651239A (en) * 1995-03-16 1997-07-29 Shikoku Kakoki Co., Ltd. Sealing device for packaging material tube
JP2001213406A (ja) * 2000-02-02 2001-08-07 Duplo Corp 包装装置、包装方法及び包装品
US20030221773A1 (en) * 2002-06-04 2003-12-04 Jones Martin T. Apparatus and method for joining polymeric materials using an electro-magnet

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036524A1 (fr) 2013-09-13 2015-03-19 Areva Nc Soudeuse thermique à dispositif de serrage magnetique
FR3010703A1 (fr) * 2013-09-13 2015-03-20 Areva Nc Soudeuse thermique a dispositif de serrage magnetique
WO2017129463A1 (fr) * 2016-01-25 2017-08-03 Tetra Laval Holdings & Finance S.A. Dispositif d'étanchéification et procédé de scellement thermique de matériau d'emballage et machine de remplissage
JP2019502609A (ja) * 2016-01-25 2019-01-31 テトラ ラバル ホールディングス アンド ファイナンス エス エイ 包装材料をヒートシールするためのシール装置および方法ならびに充填機
US10821677B2 (en) 2016-01-25 2020-11-03 Tetra Laval Holdings & Finance S.A. Sealing device and a method for heat sealing packaging material, and a filling machine

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