WO2001094234A1 - Conteneur a parois minces et son procede de fabrication - Google Patents

Conteneur a parois minces et son procede de fabrication Download PDF

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Publication number
WO2001094234A1
WO2001094234A1 PCT/EP2001/003696 EP0103696W WO0194234A1 WO 2001094234 A1 WO2001094234 A1 WO 2001094234A1 EP 0103696 W EP0103696 W EP 0103696W WO 0194234 A1 WO0194234 A1 WO 0194234A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall section
container
wall
longitudinal edge
offset
Prior art date
Application number
PCT/EP2001/003696
Other languages
German (de)
English (en)
Inventor
Hartmut Möglich
Original Assignee
Herrmann Ultraschalltechnik Gmbh & Co. Kg
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 Herrmann Ultraschalltechnik Gmbh & Co. Kg filed Critical Herrmann Ultraschalltechnik Gmbh & Co. Kg
Publication of WO2001094234A1 publication Critical patent/WO2001094234A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • 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
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/80—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials for milk
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B31B50/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding using sealing jaws or sealing dies

Definitions

  • the present invention relates to a thin-walled container made of a flexible base material, which is coated with an ultrasonically weldable flexible layer, the container having a first wall section, a second wall section which is arranged parallel and close to the first wall section and has a longitudinal edge, and comprises a third wall section which is arranged parallel and at least in sections closely fitting to the first wall section, has a longitudinal edge and overlaps the longitudinal edge of the second wall section in the region of its longitudinal edge, the second and third wall sections being along a welding line which runs essentially transversely to the longitudinal edges are welded to the first wall section.
  • Such a container is known for example as a folding container for milk from the market.
  • a flexible cardboard or a film is used as the base material, the cardboard being covered on both sides with a thin plastic layer.
  • the known container is made from a one-piece sheet, which is first brought into a square and tube-like shape. The folding is carried out so that the two longitudinal edges of the sheet overlap and can be glued or welded together. In order to be able to close at least one end of the container in a liquid-tight manner, it is flattened at this end. In the area of the overlap of the longitudinal edges, three layers of the container wall are parallel and at the flattened end close together, whereas outside the overlap in the flattened area two layers of the container wall are arranged parallel to each other and close together. The layers of the container wall are then ultrasonically welded to one another in the flattened section transversely to their longitudinal edges along a welding line, so that this end of the container is closed in a liquid-tight manner.
  • the object of the present invention is therefore to develop a thin-walled container of the type mentioned at the outset in such a way that its tightness is ensured for production and over the average life to be expected.
  • the leak points are often in the area of the overlap.
  • the ultrasonically weldable flexible layer, with which the base material is coated becomes hard during welding and a relatively brittle accumulation of material arises. This creates a zone with less flexibility in the area of the overlap. If there are mechanical loads in this area, such as deformations, bends or bends, form in cracks in the material that has become brittle and thrown up, which lead to the known leaks.
  • the welding line is offset at least in the region of the overlap, the material melted during welding and subsequently hardened can be remotely milled from said bending line.
  • the bending load - if present - is reduced or even eliminated in this area, which increases the service life of the welds lying in the weld line.
  • a section along a bending line is bent in particular by 90 °, preferably by 180 °.
  • a 90 ° turn is e.g. desired with a fold, which should result in a flat bottom.
  • a turn of 180 ° is e.g. advantageous for closing the container in the upper area.
  • the bending line lies in the plane formed by the container wall and possibly at a distance from the welding line by a distance in the opposite direction to the offset.
  • the area of the weld seam characterized by an accumulation of material is arranged particularly clearly away from the area loaded by the bend.
  • the wall sections are integrally connected to one another by one or more folds, in particular by 180 ° in each case.
  • Such a thin-walled container is made of a one-piece material particularly inexpensive and yet liquid-tight due to the offset of the welding line according to the invention.
  • the invention also relates to a method for producing a thin-walled container according to one of the preceding claims, which comprises the following steps:
  • the welding line is offset in the area of the overlap in a plane lying in the container wall.
  • a subordinate claim specifies a corresponding advantageous development of the method according to the invention, by means of which a favorable course of the welding line is achieved.
  • the invention also relates to a device for producing a thin-walled container, which has an ultrasonic welding sonotrode and a counter-holder (also called “anvil”) with one during welding of the container facing working edge and also includes a front side facing the container during welding.
  • Ultrasonic sonotrodes and counterholders of this type are used primarily for the production of containers for foods such as milk, juices etc.
  • the temperature maximum in the workpiece during welding is reached with an ultrasonic sonotrode where the amplitude of the ultrasonic waves introduced into the workpiece reaches its maximum. This position depends on from the position of the working edge facing the container during welding.
  • the working edge has an area with an offset essentially parallel to the workpiece plane. This can be implemented easily and inexpensively in the manufacture of the sonotrode, so that the desired shape of the welding line can be produced easily.
  • the area with the offset in the front view has a trapezoidal basic shape.
  • Such an offset is, on the one hand, easy to manufacture and avoids interruptions in the welding line due to the slowly rising and falling flanks during operation.
  • the area with the offset has approximately the length of the overlap.
  • the offset of the weld line is limited to the area of the overlap, which has manufacturing advantages in the further processing of the container to be manufactured.
  • the amount of the offset depends essentially on the amount of plastic thrown up in the area of the overlap. However, the offset should not be as high as desired for manufacturing-related reasons. In this regard, it has proven to be advantageous for conventional containers (for example milk and juice containers) if the height of the offset is approximately 0.5 to 4 mm.
  • the front of the sonotrode and / or the front of the counter-holder has a recess, the depth of the recess or the sum of the depths of the recesses roughly corresponding to the thickness of a wall section of the container to be welded.
  • This enables the working edge to also lie close to the workpiece to be welded in the area of the overlap, so that the necessary pressure can be applied to the workpiece in this three-layer area and the energy can be optimally transferred from the sonotrode to the workpiece without crushing which can lead to burns of the material to be welded during welding.
  • the invention also relates to a thin-walled container made of a flexible base material, which is coated with an ultrasonically weldable flexible layer, the container having a wall with at least a first wall section, a second wall section which is arranged parallel and close to the first wall section and has a longitudinal edge , and comprises a third wall section, which is arranged parallel and at least in sections closely adjacent to the first wall section, has a longitudinal edge and overlaps the longitudinal edge of the second wall section in the region of its longitudinal edge, the second and third wall sections running along a generally transverse to the longitudinal edges Weld line are welded to the first wall section.
  • the weld line face at least in the area of the overlap is offset from a plane which is formed between the first and second or third wall section. In this way, the welding line and the area that is less flexible due to it can also be removed from the immediate vicinity of an existing bending line.
  • FIG. 1 shows a view in the manner of an exploded perspective view of a section of a thin-walled container, a sonotrode and an anvil;
  • Figure 2 is a view similar to Figure 1 from a different perspective
  • FIG. 3 shows an enlarged detail view from the front of a region of the sonotrode from FIG. 1;
  • Figure 4 is a perspective view of the front of the counter holder of Figure 1;
  • Figure 5 is a sectional view through the container section of Figure 1;
  • Figure 6 is a rear view of the container section of Figure 1.
  • an upper section of a thin-walled container has the reference number 10
  • a sonotrode for ultrasonic welding has the reference number 12
  • a corresponding counter-holder has the reference number 14.
  • the container is made from a flexible base material 16, in the present case a thin cardboard. The material is coated on both sides with an ultrasonically weldable flexible plastic which bears the reference symbol 18 in FIG.
  • the container could also be made of a plastic material, for example a plastic film. In this case - provided that the plastic can be welded - a special coating could be dispensed with.
  • the upper portion 10 of the container comprises a first wall portion 20, a second wall portion 22 and a third wall portion 24. All three wall sections 20, 22 and '24 are connected by folds 26 and 28 by 180 ° together in one piece.
  • the second wall section 22 lies closely against the first wall section 20 and is arranged parallel to the latter.
  • the same also applies to the third wall section 24, with the exception that this overlaps a longitudinal edge 32 (FIG. 2) of the second wall section 22 in the region of its longitudinal edge 30, that is to say no longer lies closely against the first wall section 20 in this region.
  • the overlap formed in the area of the longitudinal edges 30 and 32 of the second wall section 22 and the third wall section 24 bears the reference number 34.
  • a cross-hatched weld line 36 runs in the area of the upper section 10 of the container transversely to the longitudinal edges 30 and 32 of the wall sections 22 and 24, along which the plastic coating 18 of the carton 16 at least partially melted, thrown up and hardened again.
  • the welding line 36 that is to say the area in which the maximum temperature is reached during the welding process, is offset in the area of the overlap 34 upwards in a trapezoidal manner.
  • the offset area like the rest of the welding line, is located in a plane 38 formed by the container wall 20, 22, and 24. That area of the welding line 36 that is offset bears the reference symbol 40.
  • the height of the offset 40 depends on the the amount of material thrown up during welding and is usually 0.5 to 4 mm.
  • the upper section 10 of the container shown in the drawing is bent over a bending line 42 shown in broken lines by 180 °.
  • the bending line 42 also lies in the plane 38 and - apart from the flanks of the area 40 - parallel to the welding line 36. However, it is spaced apart from the welding line 36 by a distance a from the welding line 36, contrary to the “bulge” formed by the offset 40 ,
  • the distance a is usually about 0.5 to 5 mm.
  • the bending line 42 runs in the area of the overlap 34 due to the offset 40 outside the welding line 36, that is also outside the welded areas.
  • the weld seam between the wall sections 20, 22 and 24, which is less flexible due to the material attachment by the melt, is less or not at all stressed by the bending, so that the hardened melt of the plastic coating 18 does not tear due to the bending can. This creates a considerably increased security against leakage of the container at this point.
  • Offset 40 removes the center of the melt formation from the bending line 42.
  • the sonotrode 12 has a front side 43 facing the upper section 10 of the container during welding, which is rounded in part-circle in cross-section in its upper and lower area, but forms a working edge 44 at the joints of the two areas. In its lateral center, the working edge 44 has an area with an offset 46 drawn up perpendicularly to the sonotrode plane, which has a trapezoidal basic shape in the view shown in FIGS. 1 and 3.
  • the upper section 10 of the container is clamped between the working edge 44 of the sonotrode 12 and the front side 48 of the counter holder 14.
  • the sonotrode 12 and the counter-holder 14 are arranged so that

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un conteneur à parois minces, qui est constitué d'un matériau de base souple (16), recouvert d'une couche souple (18) pouvant être soudée par ultrasons. Ce conteneur comprend une première partie de paroi (20) et une deuxième partie de paroi (22), qui est parallèle à ladite première partie de paroi (20), est en contact étroit par rapport à celle-ci et présente un bord longitudinal (32). Ce conteneur comprend également une troisième partie de paroi (24), qui est parallèle à ladite première partie de paroi (20), est au moins partiellement en contact étroit par rapport à celle-ci, présente un bord longitudinal (30) et chevauche le bord longitudinal (32) de la deuxième partie de paroi (22) dans la zone de son bord longitudinal (30). La deuxième partie de paroi (22) et la troisième partie de paroi (24) sont soudées à la première partie de paroi (20) le long d'une ligne de soudure (36), qui s'étend globalement de manière perpendiculaire aux bords longitudinaux (30, 32). Selon cette invention, ladite ligne de soudure (36) est, dans la zone de chevauchement (34) du conteneur, décalée dans un plan (38) se trouvant dans la paroi du conteneur.
PCT/EP2001/003696 2000-06-05 2001-03-31 Conteneur a parois minces et son procede de fabrication WO2001094234A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10027735A DE10027735C1 (de) 2000-06-05 2000-06-05 Dünnwandiger Behälter sowie Verfahren und Vorrichtung zu seiner Herstellung
DE10027735.7 2000-06-05

Publications (1)

Publication Number Publication Date
WO2001094234A1 true WO2001094234A1 (fr) 2001-12-13

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PCT/EP2001/003696 WO2001094234A1 (fr) 2000-06-05 2001-03-31 Conteneur a parois minces et son procede de fabrication

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Cited By (4)

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WO2006041377A1 (fr) * 2004-10-15 2006-04-20 Tetra Laval Holdings & Finance S.A. Procédé et appareil de soudage par ultrasons
US7665276B2 (en) 2003-11-24 2010-02-23 Tetra Laval Holdings & Finance S.A. Apparatus for sealing a package
CN107000872A (zh) * 2014-10-31 2017-08-01 Sig技术股份公司 装置，特别是用于封闭由具有被刮削和折叠的边缘区域的层压板制成的食品容器的头部区域
US10543665B2 (en) 2014-10-31 2020-01-28 Sig Technology Ag Container precursor, in particular for the manufacture of a food container, from a laminate with a plastic gas and aroma barrier and a peeled edge region, which is partially folded back on itself

Families Citing this family (6)

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HU229009B1 (en) 2001-11-20 2013-07-29 Josef Gmeiner Device for connecting a multilayered web by ultrasound
DE10214405A1 (de) 2002-03-30 2003-10-09 Herrmann Ultraschalltechnik Vorrichtung sowie Verfahren zum Verschweißen dünnwandiger Werkstücke mittels Ultraschall
DE10227502B4 (de) * 2002-06-19 2005-10-13 Mars Incorporated Verfahren zur Herstellung von dünnwandigen Behältern aus Folienbahnen und Fertigungseinrichtung zur Durchführung des Verfahrens
SE528872C2 (sv) * 2005-07-08 2007-03-06 Tetra Laval Holdings & Finance Anordning och förfarande för tvärförsegling
DE102010039003B4 (de) * 2010-08-06 2014-01-16 Telesonic Holding Ag Vorrichtung zum Verschweißen und Prägen dünnwandiger Werkstücke mittels Ultraschall
DE102014015959A1 (de) * 2014-10-31 2016-05-19 Sig Technology Ag Vorrichtung, insbesondere zum Verschließen eines Kopfbereichs eines Nahrungsmittelbehälters, aus einem Laminat mit geschältem und teilweise auf sich selbst umgeschlagenen Randbereich

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US4609107A (en) * 1984-04-16 1986-09-02 Andrew McG. Martin Easy open and reclosable bag having a separable reclosure tie
US5924267A (en) * 1995-01-14 1999-07-20 Sig Combibloc Gmbh Process and a device for closing filled folded-carton packages

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US4609107A (en) * 1984-04-16 1986-09-02 Andrew McG. Martin Easy open and reclosable bag having a separable reclosure tie
US5924267A (en) * 1995-01-14 1999-07-20 Sig Combibloc Gmbh Process and a device for closing filled folded-carton packages

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665276B2 (en) 2003-11-24 2010-02-23 Tetra Laval Holdings & Finance S.A. Apparatus for sealing a package
WO2006041377A1 (fr) * 2004-10-15 2006-04-20 Tetra Laval Holdings & Finance S.A. Procédé et appareil de soudage par ultrasons
CN107000872A (zh) * 2014-10-31 2017-08-01 Sig技术股份公司 装置，特别是用于封闭由具有被刮削和折叠的边缘区域的层压板制成的食品容器的头部区域
JP2017538628A (ja) * 2014-10-31 2017-12-28 エスアイジー テクノロジー アーゲー スカイブ加工されて折り重ねられる縁部領域を有する積層体から形成される食料品容器の特に頭部領域を閉鎖するための装置
CN107000872B (zh) * 2014-10-31 2019-07-12 Sig技术股份公司 装置，特别是用于封闭由具有被刮削和折叠的边缘区域的层压板制成的食品容器的头部区域
US10543665B2 (en) 2014-10-31 2020-01-28 Sig Technology Ag Container precursor, in particular for the manufacture of a food container, from a laminate with a plastic gas and aroma barrier and a peeled edge region, which is partially folded back on itself
US10870508B2 (en) 2014-10-31 2020-12-22 Sig Technology Ag Device, in particular for closing a top portion of a food container, consisting of a laminate with a peeled and folded-back edge region

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