WO2000044624A1 - Disposition des machoires de scellement d'un materiau d'emballage en tube continu - Google Patents

Disposition des machoires de scellement d'un materiau d'emballage en tube continu Download PDF

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Publication number
WO2000044624A1
WO2000044624A1 PCT/EP2000/000463 EP0000463W WO0044624A1 WO 2000044624 A1 WO2000044624 A1 WO 2000044624A1 EP 0000463 W EP0000463 W EP 0000463W WO 0044624 A1 WO0044624 A1 WO 0044624A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
material web
sealing jaws
jaws
packaging material
Prior art date
Application number
PCT/EP2000/000463
Other languages
English (en)
Inventor
Markus PALMNÄS
Lars-Ebbe Persson
Lennart Hansson
Original Assignee
Tetra Laval Holdings & 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 & Finance Sa filed Critical Tetra Laval Holdings & Finance Sa
Priority to AU26657/00A priority Critical patent/AU2665700A/en
Publication of WO2000044624A1 publication Critical patent/WO2000044624A1/fr

Links

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
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • 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
    • B29C65/3672—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
    • B29C66/11—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
    • B29C66/70—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
    • B29C66/72—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
    • B29C66/72327—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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/7234—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 barrier layer
    • 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
    • B29C66/8145—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
    • B29C66/81457—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 block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83531—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on chains
    • B29C66/83533—Cooperating jaws mounted on cooperating chains and moving in a closed path
    • 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
    • B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
    • 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
    • B29C66/98—Determining the joining area by using markings on at least one of the parts to be joined
    • 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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/18—Registering sheets, blanks, or webs
    • 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

Definitions

  • the invention relates to a packaging machine for producing containers for pourable food products, by sealing and cutting a continuous tubular packaging material web between consecutive packages, and said machine comprising at least one pair of cooperating sealing jaws, which are pressed together to form a sealing in the packaging material web, said jaws being operable to move along said tubular web and to clamp it synchronously with the feeding of the material web.
  • the invention also relates to a method for design correction in such a machine.
  • the invention relates to the technical field of packaging of pourable food products, such as fruit juice, heat treated milk subjected to so-called UHT (Ultra High Temperature) treatment, tomato puree, sauces, etc.
  • pourable food products such as fruit juice, heat treated milk subjected to so-called UHT (Ultra High Temperature) treatment, tomato puree, sauces, etc.
  • UHT Ultra High Temperature
  • tomato puree tomato puree
  • sauces etc.
  • Such products are packaged in packages that are manufactured from a previously sterilised or sterile- treated packaging material .
  • a typical example of this kind of package is the tetrahedral packaging container for liquid or pourable food products, which is known by the name TETRA CLASSIC ASEPTIC (Registered Trade Mark) , which is manufactured by folding and sealing of a web-shaped laminated packaging material .
  • the laminated packaging material comprises a support layer, made of e.g. fibrous material such as paper, coated on either side with a thermoplastic material such as polyethylene.
  • a layer of barrier material such as e.g. aluminium foil, which is also coated with a thermoplastic layer.
  • packaging material web is sterilised in the packaging machine by the application of a chemical sterilisation agent such as e.g. hydrogen peroxide solution.
  • a chemical sterilisation agent such as e.g. hydrogen peroxide solution.
  • the sterilisation agent is removed from the surfaces of the packaging material, for example, it may be vaporised by heating.
  • the sterilised packaging material is folded and longitudinally sealed to form a tube, which is filled with a sterile-treated food product.
  • the tube passes between two pairs of endless chains bearing sealing members which clamp and seal the tube therebetween to produce a first sealed band of material extending in a first direction, and a second sealed band of material extending in a perpendicular direction.
  • the resulting packages have a tetrahedral shape.
  • the sealed packaging material bands are cut between consecutive filled and sealed tetrahedral packages.
  • An example of this type of packaging machine is the TETRA CLASSIC ASEPTIC (Registered Trade Mark) filling machine, manufactured by Tetra Pak Stalvall, in Partille, Sweden.
  • the packaging material web which must be positioned with respect to the sealing jaws, i.e. the forming of the two ends of the container.
  • the web material may be provided with drinking straw openings or perforations that must be positioned with respect to the sealing jaws .
  • a motorized roller system has been used to vary the
  • this kind of system creates some wasted packages, i.e., the packages which are filled and sealed, but have to be discarded because the design printed on the packaging material, the straw opening or the perforation does not appear in the correct place on the finished package.
  • the motorized roller design correction system is not practical to apply, when packaging containers of a different volume are to be produced, because this system generates tensions in the web material that may lead to damaged containers, especially in the case of large volume containers.
  • the above described design correction system is located at some distance from the container forming sealing jaws, and it is not well adapted for quick and precise corrections in response to small variations along the material web.
  • one of the objects of the invention is to provide such a method and apparatus which solves the above described problems in a simple and efficient manner .
  • Another object is to make it possible to use design correction at containers having a large volume .
  • the packaging machine comprises means for detecting the position of the material web and for comparing the material web position with the position of the sealing jaws, and means for controlling the in-movement of the sealing jaws with respect to the longitudinally-sealed liquid- filled packaging material tube, so that more or less of the tube is drawn in by the sealing jaws, past the point of sealing.
  • the means for detecting the position of the material web comprises a photocell for registering a series of index marks on the material tube.
  • the means for comparing the material web position with the position of the sealing jaws comprises a decoder and a machine control unit .
  • the decoder is preferably connected to an actuator for controlling the in-movement of the sealing jaws with respect to the longitudinally-sealed, liquid-filled packaging material tube.
  • the actuator is adapted to cooperate with a cam surface which influences the in-movement of the sealing jaws.
  • This cam surface may cooperate with a guide means on the sealing jaw.
  • the actuator is preferably a pneumatic cylinder which is operable between two positions with resulting different cam surface ramp angles .
  • the sealing jaws are arranged on endless chains operating on opposite sides of the packaging material tube.
  • Each sealing jaw may be pivotally connected to the respective chain at a distance from the guide means .
  • a method for design correction comprises the steps of detecting the position of the material web, comparing the material web position with the position of the sealing jaws, and controlling the in-movement of the sealing jaws with respect to the longitudinally-sealed liquid-filled packaging material tube for drawing in more or less of the tube past the next sealing point.
  • the angle of the sealing jaws is adjusted before they come into contact with the material tube.
  • the sealing jaws are pivoted into a parallel position, after they have compressed the material tube at an angled stance.
  • FIG. 1 is a side view, partly in cross section, of a sealing jaw used in the packaging machine according to the invention
  • FIG. 2 is a side view which schematically shows a part of a machine according to the invention in a first mode of operation
  • FIG. 3 is a corresponding view showing the machine in a second mode of operation
  • FIG. 4 is a side view of an actuator mechanism used in the packaging machine according to the invention
  • FIG. 5 is a top view of the actuator mechanism of FIG. 4.
  • the sealing jaw 10 shown in FIG. 1 comprises a main body 11 to which a pair of volume defining portions 12 are connected via a fastening means 13.
  • the main body 11 is provided with an attachment 14 for connection to an endless chain (not shown in the drawings) , which drives a number of sealing jaws in a synchronous motion along the tubular material web 15 (see FIG. 2 and 3) , substantially in accordance with prior art in the field.
  • the attachment 14 forms a pivot point for the sealing jaw with respect to the endless chain.
  • a small guide roller 16 is iocated at the opposite end of the sealing jaw. This guide roller 16 is used for controlling the in-movement of the sealing jaw in the process of making the next following seal in the tubular material web.
  • the main body 11 is provided with a resilient pressure surface 11a which cooperates with a corresponding opposite sealing jaw which is provided with induction heat sealing means.
  • a larger guide roller 17 is arranged on the main body 11 for providing support of the sealing jaw during the final sealing phase.
  • FIG. ' 2 and 3 illustrates the first part of this sealing phase, where the pair of opposed sealing jaws 10 are brought together from opposite directions against the longitudinally-sealed liquid- filled packaging material tube 15.
  • the trajectory of each sealing jaw 10 is controlled by a cam member 18 which is mounted to the machine frame 19 via a first and a second coupling means 20 and 21, respectively.
  • the cam member 18 is provided with a cam surface 18a which cooperates with the guide roller 16 on the sealing jaw 10 when the two sealing jaws are brought together..
  • the first coupling means 20 is connected to the cam member 18 via an aperture 22 (see FIG. 4) that is oval, so that it provides a small play for movement at this end of the cam member.
  • the second coupling means forms a fixed pivot point 18.
  • the cam member is provided with a push rod 23 which rests on an actuator 24 which is rigidly mounted on the machine frame 19. When the actuator 24 is activated or deactivated, the push rod tilts the cam member around the pivot point 21, as far as the aperture 22 at the opposite end of the cam member permits. In this way, the ramp angle of the cam surface 18a for the guide roller 16 is altered.
  • a photocell 25 is positioned near the material web tube 15, so that it is able to register a series of index marks 26 that are printed on the packaging material web. Each mark is read by the photocell 25 and the information is transmitted to a machine control unit via a decoder 27, so that the position of the mark 26 can be compared to the position of the sealing jaws 10. This information is processed and a decision is made to make a design correction, if the index mark is not in register with the position of the sealing jaws.
  • the decoder 27 is electrically connected to an air valve which simultaneously activates or deactivates the two actuators 24.
  • FIG. 2 shows a first mode of operation, without design correction, where the two central resilient parts 11a of the sealing jaws are brought together close to parallel.
  • the actuators 24 are activated in this mode of operation, and the steep cam surface ramp angle controls the guide rollers 16, so that the resilient parts lib of the sealing jaws are brought together almost immediately.
  • FIG. 3 shows a second mode of operation, with design correction, where the two central resilient parts 11a of the sealing jaws are brought together at a mutual angle. This angle is the result of the deactivation of the actuators 24, reducing the ramp angle of the cam surface for the guide rollers 16.
  • the sealing jaws are brought together at a point which is moved a certain distance upstream along the material web tube.
  • the two sealing jaws 10 are brought into parallel downstream of the point illustrated in Fig. 3, the material web tube is pulled in the direction of travel, so that more material is drawn past the resilient parts 11a that perform the next following sealing.
  • the distance variation between FIG. 2 and FIG. 3 is illustrated by means of the arrows 28 and 29, respectively.
  • design correction system uses an ON/OFF actuator 24, but it would also be possible to use an actuator which could move to one or more positions in between the two end positions. In this way, it would be possible to control the design correction system even more precisely.
  • the concept of the present invention is of course also applicable to other types of packaging containers for pourable food products, for example to packaging containers known by the name TETRA BRIK (Registered Trade Mark) or similar.
  • the above-described machine for packaging liquid or pourable food products is also more versatile than current liquid food packaging machines of the form, fill and seal type. Normally, each liquid food packaging machine has to undergo substantial rebuilding each time that it is desired to produce containers having a different volume. Significant changes have to be made in the design correction system. This implies significant down-time each time that a volume change is made.
  • the machine incorporating the design correction system according t o the invention by replacing the sealing jaws 10 and volume- defining portions 12 with different sized sealing jaws and volume- defining portions 12, the same machine can be used to manufacture containers from a liquid-filled longitudinally-sealed packaging material tube 15 of a different diameter, whereby to make containers having a different volume.
  • the design correction system is easily adjusted to ensure the correct in-movement for the new volume containers in the manner described heretofore. This means that the down-time required for changing volume of the packages to be manufactured is greatly reduced when compared to standard machines. Consequently, the above described machine incorporating the design correction system according to the invention, is volume-flexible to some extent, and more versatile in operation.
  • the invention is in no way limited to the shown embodiments but can be varied in a number of ways within the scope of the appended claims.
  • the means for controlling the trajectory of the sealing jaw may be designed differently.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Package Closures (AREA)

Abstract

L'invention porte sur une machine à emballer produisant des récipients pour produits alimentaires versables par scellement et découpage d'un tube continu d'un matériau d'emballage (15) entre deux emballages consécutifs. La machine comporte au moins une paire de mâchoires (10) de scellement associées qui pressées l'une contre l'autre scellent le tube de matériau d'emballage. Les mâchoires, qui peuvent se déplacer le long du tube, le saisissent en synchronisme avec le remplissage du tube. Pour faciliter les corrections de conception, la machine est munie de moyens (25, 27) détectant la position du tube et la comparant avec celle des mâchoires (10), et de moyens (16, 18, 24) de commande du mouvement des mâchoires vers l'intérieur par rapport au tube (15) scellé longitudinalement et rempli de liquide, ce qui permet aux mâchoires de faire avancer une longueur de tube plus ou moins grande au delà de la zone de scellement.
PCT/EP2000/000463 1999-01-27 2000-01-21 Disposition des machoires de scellement d'un materiau d'emballage en tube continu WO2000044624A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26657/00A AU2665700A (en) 1999-01-27 2000-01-21 Sealing jaws arrangement for packaging web material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9900243A SE515286C2 (sv) 1999-01-27 1999-01-27 En förpackningsmaskin samt förfarande för framställning av förseglade behållare för livsmedelsprodukter
SE9900243-8 1999-01-27

Publications (1)

Publication Number Publication Date
WO2000044624A1 true WO2000044624A1 (fr) 2000-08-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/000463 WO2000044624A1 (fr) 1999-01-27 2000-01-21 Disposition des machoires de scellement d'un materiau d'emballage en tube continu

Country Status (3)

Country Link
AU (1) AU2665700A (fr)
SE (1) SE515286C2 (fr)
WO (1) WO2000044624A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006073339A1 (fr) * 2005-01-10 2006-07-13 Tetra Laval Holdings & Finance S.A. Dispositif et procede de maitrise d'une torsion d'un tube

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176049B (de) * 1960-02-11 1964-08-13 Hayssen Mfg Company Automatische Verpackungsmaschine zum Herstellen schlauchfoermiger Packungen
EP0401422A1 (fr) * 1989-06-06 1990-12-12 Italpack S.R.L. Machine de remplissage et d'emballage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176049B (de) * 1960-02-11 1964-08-13 Hayssen Mfg Company Automatische Verpackungsmaschine zum Herstellen schlauchfoermiger Packungen
EP0401422A1 (fr) * 1989-06-06 1990-12-12 Italpack S.R.L. Machine de remplissage et d'emballage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006073339A1 (fr) * 2005-01-10 2006-07-13 Tetra Laval Holdings & Finance S.A. Dispositif et procede de maitrise d'une torsion d'un tube
JP2008522917A (ja) * 2005-01-10 2008-07-03 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム チューブの捩れを制御する装置および方法
US7827768B2 (en) 2005-01-10 2010-11-09 Tetra Laval Holdings & Finance S.A. Device and a method for controlling a twist of a tube
JP4648404B2 (ja) * 2005-01-10 2011-03-09 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム チューブの捩れを制御する装置および方法

Also Published As

Publication number Publication date
SE515286C2 (sv) 2001-07-09
SE9900243D0 (sv) 1999-01-27
SE9900243L (sv) 2000-07-28
AU2665700A (en) 2000-08-18

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