EP0093849A2 - Emballage pour matériaux fluides, présentant un dispositif d'ouverture refermable - Google Patents

Emballage pour matériaux fluides, présentant un dispositif d'ouverture refermable Download PDF

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Publication number
EP0093849A2
EP0093849A2 EP83102214A EP83102214A EP0093849A2 EP 0093849 A2 EP0093849 A2 EP 0093849A2 EP 83102214 A EP83102214 A EP 83102214A EP 83102214 A EP83102214 A EP 83102214A EP 0093849 A2 EP0093849 A2 EP 0093849A2
Authority
EP
European Patent Office
Prior art keywords
pack
tube
mandrel
triangular
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83102214A
Other languages
German (de)
English (en)
Other versions
EP0093849A3 (en
EP0093849B1 (fr
Inventor
Wilhelm Reil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Tetra Pak Developpement SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA, Tetra Pak Developpement SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0093849A2 publication Critical patent/EP0093849A2/fr
Publication of EP0093849A3 publication Critical patent/EP0093849A3/de
Application granted granted Critical
Publication of EP0093849B1 publication Critical patent/EP0093849B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/04—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper
    • B65D15/08—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made by winding or bending paper with end walls made of plastics material
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
    • 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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/02—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape
    • B65D3/08—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by shape having a cross-section of varying shape, e.g. circular merging into square or rectangular
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B65D47/103—Membranes with a tearing element
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
    • B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
    • B65D5/064—Rectangular containers having a body with gusset-flaps folded outwardly or adhered to the side or the top of the container
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1036—Bending of one piece blank and joining edges to form article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1036—Bending of one piece blank and joining edges to form article
    • Y10T156/1038—Hollow cylinder article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1043—Subsequent to assembly
    • Y10T156/1049—Folding only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1051—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by folding

Definitions

  • the invention relates to a pack for flowable fillings, consisting of side walls and end walls connected to one another via at least one longitudinal sealing seam, which are attached to the ends of the tube, form the bottom and lid of the pack and of which one, the end wall forming the lid, made of thermoplastic material without Backing material is made, is injection molded along its outer edge on the side walls - and has a pouring device folded inward within the outer contour of the pack and the other end wall, which represents the bottom, is square and has triangular flaps folded over onto an adjacent wall, the side walls and the bottom being composed of at least carrier material coated on one side with thermoplastic, e.g. B. cardboard exist.
  • thermoplastic e.g. B. cardboard
  • the type of pack that has currently become the most popular for the transport of liquids, especially milk and fruit juices, is a parallelepipedic pack, which consists of a tube made of plastic material coated on both sides, which is closed at its ends by cross-sealing ribs in the area of the end walls and is brought into a parallelepiped shape, so that there are two opposite, double-walled triangular flaps on each end wall, which first protrude outward from the end walls of the pack and are finally folded over against adjacent side walls or the end walls of the pack.
  • the pouring opening is formed by punching perforation lines or other lines of weakness in the outer pack layer, which are torn off after the corresponding triangular flap has been unfolded.
  • the cover strip is grasped and pulled up via a free grip section which is not fastened to the side wall, and the tear-open opening arranged on the inside of the triangular tab is then exposed in the form of a round or elongated hole.
  • the pouring in this known package does not take place in the desired jet in order to avoid the filling material being spilled.
  • the package known from the publication mentioned is, so to speak, upside down for filling; because the one-piece lid provided with the opening device is initially arranged at the bottom, while the base, which is only molded on along its one side edge, is arranged at the top with the tube of the ready-to-fill pack open next to it.
  • complicated injection molds for injecting the thermoplastic end walls are no longer required, and the tools can also be easily pulled out or pushed out of the tube.
  • the well-known package After filling, the well-known package is closed on its bottom. Difficulties in centering and precisely liquid-tight welding can sometimes arise here, or at least the mechanical expenditure involved in closing the end wall forming the bottom is not insignificant, although the main centering work has already been done by spraying this bottom onto a side wall.
  • the object of the invention is to provide a particularly useful base in a pack in which the only end wall made of thermoplastic plastic forms the lid and the end wall representing the bottom is square and has triangular flaps folded over onto adjacent fields.
  • the new pack should be stable and have good sealing properties, whereby the end user can easily open and close the new pack without special instructions.
  • the invention also aims to create a method for producing such a package and an apparatus for carrying out this method.
  • the new pack is characterized in that at least two opposing triangular flaps of the base are folded inwards around the lower edge between the base and side wall into the base plane or outwards onto the side wall and fixed in this position.
  • a particularly preferred embodiment is characterized in that two opposing triangular flaps of the base are folded around the bottom edge at the bottom into the base plane and are completely covered by the adjacent base wall parts.
  • the two triangular lobes lying opposite one another are thus placed in the plane of the package bottom and are then arranged essentially perpendicular to the side walls.
  • the still open parts are closed by the adjacent bottom wall parts by their subsequent folding down, whereby the complete covering of these bottom wall parts, which have recently been folded down to the level of the floor, creates an appealing and half of the floor covering device with a smooth wall.
  • the bottom has a transverse sealing seam, which extends between two opposite lower edges between the bottom and the side wall. If, in a further embodiment of the invention, the transverse sealing seam is folded four times as thick and folded flat around the center folding edge common to the bottom, this results not only in a very stable but also practical and easy-to-stack pack for the user.
  • Another preferred embodiment of the invention is characterized in that two pairs of opposing triangular lobes are folded over to form the base at the bottom around the respective lower edge, the bottom wall parts arranged therebetween are sealed to one another in a liquid-tight manner and are connected to one another in a liquid-tight manner at the common center by a plastic sealing drop.
  • This type of star closure requires not only two but four triangular lobes, each opposing each other, which practically predefine the bottom wall after folding over the lower edge into the above-mentioned floor level. Due to the sealing of the bottom wall parts lying between the triangular lobes, all edges are liquid-tight except for the center. The common center is then additionally closed liquid-tight according to the teaching of the invention by a sealing drop made of thermoplastic plastic.
  • the bottom wall parts arranged between the pairs of triangles are triangular and folded over onto the triangular tabs.
  • the invention provides a plasticizer pack in which a hitherto unusual combination of completely different closure walls is used on the end walls.
  • the end wall forming the cover is made of pure thermo plastic plastic consist; the floor, on the other hand, is to be closed by a fold and seal, as in the conventional packs, and the opening of the end wall designs which have been customary up to now has repeatedly caused difficulties.
  • the new principle according to the invention which is to create a front wall as a pure plastic lid and base in the classic square shape, it is possible to produce plasticizer packs in the form of cubes, cuboids or other designs.
  • the lid and the cross section of the pack are round at least in the area of the lid and that the shape of the lid is the use form during and immediately after the spraying process.
  • the latter feature means; that the lid, which is made only of thermoplastic, is injection molded in the shape of its use.
  • thermoplastic plastic generally has the endeavor in its Manufacturing mold to return after it has previously been deformed.
  • end walls forming the lid with an opening device are injection molded as a whole, so that the form of transport is immediately apparent. Then, after filling and closing, the package can be immediately transferred to a collecting container and handed over to the transport.
  • the round cover and the round design of the cross-section of the pack in the area of the cover make it possible to produce particularly simple tools, and yet the pack equipped in this way still has the advantages of stability, good use of space, combination in collecting containers and tightness.
  • the Au pouring device has an outwardly projecting ring collar, the upper edge of which is connected to a sealing plug with a welded grip ring and for the transpo lies within the outer contour of the pack.
  • the grip ring also protrudes somewhat from the sealing plug in the manufacturing spray design, so that the user can easily grasp it sen, pull up the pouring device with it into the use form and open the opening by tearing off the sealing plug along the upper edge of the ring collar.
  • the gripping ring before is open 180 0 laterally against the stopper turned out.
  • a bulge protruding from the ring collar and the hinge are formed on the diametrically opposite side of the sealing plug at the connection point of the gripping ring on the sealing plug.
  • the bulging allows a first small air inlet opening to be formed when the gripping ring is torn up and after reaching the shape of use, whereby the opening, i.e. the tearing of the sealing plug along the upper edge of the ring collar is facilitated.
  • the coated carrier material is first pre-grooved, fed to bending and folding stations by a winding-on web form and pulled against an outer ring under tension to produce a tube. Only then is the tube closed by longitudinal sealing.
  • a tube which will later be closed by longitudinal sealing, in such a way that a pre-embossed material web, after being cut accordingly, is passed through the inside, with the formation of this tube, through an outer ring with such tension that the material web lies on the ring and thus becomes circular in cross section. If you use this development now Proposals for achieving the object according to the invention, then the tube is expediently drawn onto a calibration mandrel.
  • the longitudinal sealing takes place according to the invention between this and outer jaws.
  • a section length of the tube is withdrawn from the calibration mandrel in cycles, transferred to an injection mold lower part and moved to the side out of the feed direction into position relative to an injection mold upper part.
  • the lid is injected and cooled while being connected to the end of the tube section.
  • This tube section which is closed on one side, is then pulled off the lower part of the injection mold.
  • the pack is sealed on the bottom after filling by welding the bottom of the block.
  • the path for forming the tube is drawn from the inside against an outer ring and thereby brought into the shape of a circle in cross-section
  • the above features additionally provide for the tube thus formed on a calibration mandrel Due to the special nature of the new pack with the two different types of closures on the end walls of the respective tube section (corresponding to a pack), the filling takes place later, so that the space in the tube is available for the calibration mandrel.
  • the longitudinal seal seam is created in batches between the calibration mandrel and one or several outer jaws, so that the tube to be closed lengthways is arranged between the mandrel and the jaws.
  • the tube is pulled off the calibration mandrel and transferred to another mandrel, which is simultaneously designed as an injection tool.
  • the section length of the tube is moved out of the feed direction after being separated and into the injection molding machine, where the end wall forming the cover is molded onto the still open edge of the tube section becomes.
  • This spraying technique is mastered in technology, and in this way a good adhesion between the thermoplastic plastic of the cover and the side walls coated with plastic and thus a perfect seal are guaranteed.
  • the freshly sprayed lid which is in the form of the use form, is then cooled, after which the tube section is pulled off the lower part of the injection mold.
  • the liquid level or the upper level of the filled bulk material can be up to a desired lower edge introduced, there is the F shaped- medium level yet far enough from the weld away that certainly not filling the transverse sealing between the tools or the surfaces to be welded reached.
  • the sides are folded together at the relevant edge of the tube without touching the filling material, so that the weld seam can be easily applied after folding.
  • the triangular flaps are then folded over in a known manner and — on an adjacent wall, preferably — the end wall itself, which forms the bottom, is welded on. It goes without saying that in order to carry out the block bottom shaping and then the block bottom welding, the cross section of the packing must be square in the region of this end wall which later forms the bottom.
  • the invention is advantageously further developed in that the axis of the tube is provided in the conveying direction. It is indeed conceivable and in practice even customary to arrange the axis of the tube transversely to the conveying direction, the production of the pack according to the new method according to the However, the invention permits greater production speed and fewer relative movements of the individual tube sections from one work station to the next if the tube axis lies in the conveying direction.
  • the device according to the invention have particular advantages in that the pre-embossed paper web is pre-embossed with such a width that two or even three pack blanks could be produced next to one another if only two or three devices were used to carry out the method described above be arranged side by side.
  • the device for performing the method described above is characterized in that in alignment with an outer form ring and coaxially with it, a calibration mandrel is attached, next to which a longitudinal sealing jaw is movably provided, that at least one transport jaw oscillates cyclically in the conveying direction behind it and a cutting device is arranged behind the calibration mandrel, next to which a rotatable mandrel wheel with at least three radially protruding mandrel-shaped injection mold lower parts is provided, an injection device with an injection mold upper part is attached at an angular distance from the axis of the calibration mandrel, and a conveyor with a spacing from one another under the mandrel wheel arranged, open top mold drivers, a filling and a closing station are provided.
  • the device constructed in this way can be relatively confined space; because all embossing, cutting and longitudinal sealing stations can be arranged in front of or behind deflection rollers, so that the calibration mandrel can be arranged in the desired position, for example at an angle of inclination of 45 to the horizontal, next to the mandrel wheel and yet be loaded in the desired conveying direction without difficulty.
  • one or two pairs of rollers in the form of round knives are provided between the web winding and the calibration mandrel for separating the web into two or three partial webs, so that during continuous or batch operation the web pulled off the winding continuously into the correct width is separated. Further folding stations can optionally be arranged behind these circular knives, for example in order to impress package edges.
  • the relevant station can also be arranged in front of one, possibly the last deflecting roller in front of the calibration mandrel.
  • a sealing strip is placed on the later inside of the coated paper web in the area of the later longitudinal sealing seam; so that an uncoated surface due to the cut on the side edge of the web does not come to lie opposite the filling material, in particular the liquid. Otherwise the liquid could penetrate the cut edge, which is not protected by plastic, and soften the package there. For this reason, cover strips or sealing strips have been provided for the cut edge so that these are also coated with plastic and the difficulties mentioned above are avoided.
  • the coated paper web treated in this way is expediently guided through a deflection roller in such a way that the completely prepared paper web leads to the one described.
  • one or two longitudinal sealing jaws are movably arranged.
  • the longitudinal seam is sealed with the aid of this longitudinal sealing jaw, which acts on the outside or acts on the outside, on the calibration or forming mandrel.
  • Sealing the cut edge can not only be done by applying a corresponding cover strip, as described above, but can also be done later on the mandrel wheel, namely when the end wall that later forms the lid is molded on.
  • an annular stop is provided on a mandrel-shaped injection mold lower part - against which the tube section is pushed when the calibration mandrel is pushed down and transferred onto the mandrel-shaped injection mold lower part .
  • This pushing in takes place by means of transport jaws arranged behind the longitudinal sealing jaw in the conveying direction; where one or more transport jaws can be provided which oscillate in cycles
  • the conveying device has two transport jaws which are arranged diametrically opposite one another outside the hollow-shaped calibration mandrel and an inner part which can be moved centrally therebetween in a longitudinal slot of the calibration mandrel.
  • the conveying device has two transport jaws which are arranged diametrically opposite one another outside the hollow-shaped calibration mandrel and an inner part which can be moved centrally therebetween in a longitudinal slot of the calibration mandrel.
  • a cutting device is arranged behind the calibration mandrel - when looking in the conveying direction of the tube - which, in a special embodiment of the invention, preferably has a rotating ring which is arranged around the circumference and carries a cam-controlled knife.
  • the packaging machine therefore works in such a way that first the longitudinal weld seam is created on the calibration mandrel, then the tube is moved a section length further towards the mandrel wheel, so that the longitudinal seal seam can cool and harden. During this movement, the next front section length was transferred from the calibration mandrel to the lower part of the injection mold, specifically via a gap in which the cutting device described is arranged.
  • the tube must be separated or separated into the individual section lengths, because otherwise the mandrel-shaped injection mold lower part cannot move laterally out of the transport device on the mandrel wheel by rotation.
  • the rotatable mandrel wheel which is arranged next to the cutting device, has at least three, preferably eight, radially projecting, mandrel-shaped injection mold lower parts which are arranged at a corresponding angular distance from one another.
  • the mandrel wheel rotates in cycles, just as the entire device works in cycles.
  • the tube section length described by the cutting device is moved by a certain angular rotation of the mandrel wheel under the injection machine, in particular the lower part of the injection mold, so that the lower part and the upper part of the injection machine are exactly aligned with one another. In this state, the end wall which later forms the lid can be sprayed.
  • the mandrel wheel and thus the tube section under consideration continues to move intermittently until the conveyor, which is preferably arranged horizontally under the mandrel wheel, is reached.
  • This can be one of the known chain conveyors, which offers sufficient rigidity and resistance, so that the abovementioned stop, ie the ring that is movable relative to the mandrel-shaped injection mold lower parts, can strip off the tube section under consideration with the meanwhile hardened lid and put it down so firmly, that all project beyond the end line perpendicular to the tube axis at the end of the tube. Parts, in particular the opening device on the lid, are pushed in in the transport configuration.
  • the scraper ring which was also the stop, moves on the mandrel-shaped injection mold lower part during the next intermittent rotation in the direction of the center of the mandrel wheel, in order to stop the next tube section as a stop once the angular position described above has been reached.
  • the package which is initially still upside down, is placed with the lid on the conveyor and with the bottom open at the top by the conveyor, for example the so-called station chains, under a piston filler or the like, in which the package is filled with the filling material.
  • mold drivers on the conveyor which are preferably open at the top and, in a further other preferred embodiment, have at least two parts which can be moved relative to one another and which are according to the invention Specify a round cross-section at least in the area of one lower end in the retracted state and a square cross-section at the other upper end. This specifies the prerequisites for the block bottom molding and then the block bottom welding.
  • form drivers are expediently attached to the conveyor at a distance from one another in such a way that they move with it and are always in alignment under the mandrel-shaped Injection mold lower parts to take over the tube section that is closed on one side.
  • these form drivers together with the packs which are then open at the top, are in alignment under the filling station and, accordingly, later under the various stations for closing the end wall which will later form the bottom, preparing the triangular tabs for application, heating the triangular tabs and under the corner pressure stamp.
  • An expedient embodiment of the device has a cycle of two seconds and eight mandrel-shaped injection mold lower parts — evenly distributed around the circumference of the mandrel wheel.
  • the axis of the calibration mandrel is inclined at 45 ° to the horizontal
  • the longitudinal axis of the injection tool is at an angular distance from 45 ° to the calibration mandrel so that the lower and upper parts of the injection mold are arranged approximately vertically under the injection machine, and after leaving the injection machine - the freshly sprayed cover has its next position turned 45 out of the injection machine until it is stripped off and transferred of the tube section in the mold driver open at the top in a time of 3 work cycles, ie 3 x 2 seconds, for cooling the lid a total of 6 seconds.
  • the paper web ie the carrier material
  • the paper web only needs to be provided with a thinner plastic layer, and the longitudinal welding and also the attachment of the transverse sealing seam are nevertheless guaranteed perfectly; because it is a dry weld when welding the bottom of the block.
  • the simple processing and the small number of structural units in the device is further favored by the pre-stamping of the material web to be processed during its manufacture. Due to the thinner plastic coating of the carrier material web, a higher extruder running speed is advantageously possible. We can draw on years of experience in material production.
  • FIGS. 1 to 6 the pack by reference to Figs. 7 and 8, the device for creation of the package H, and finally a possible operation of the device described.
  • Viable filling materials consists of a total of 1 designated side walls because INCist a round cross-section in-here shown embodiment in the area of the cover 2 (as well as the cover 2 in top view is circular is), so that one could differentiate between four side walls at most on the end wall side forming the bottom 3.
  • the present description speaks of the side walls 1.
  • These are formed into a tube as shown in FIGS. 1 to 4 and connected along the longitudinal sealing seam 4 for the final formation of the closed tube.
  • the longitudinal seal 4 extends into the bottom 3. This results from the cutting, as can also be seen in FIG. 4.
  • This tube has the height H in the shape of FIG. 2, which, taking into account the shaping shown in FIG. 4 - before completion - of the base 3 is evidently smaller than the section length A from the free upper edge 5 of the tube to the upper edge 6 of the tube Cover 2 is.
  • the bottom edge of the finished package results from the line labeled 7, which is shown in Figs. 2-4. Due to the different fold or embossing lines not shown and shown in FIG denformen the double cardboard strip 8 (Fig. 3) is formed, in which the located in Fig. 2 and barely visible cross seal 9 is located.
  • the triangular lobes 10 are also formed here.
  • the base 3 is created from the state of FIG. 4 via that of FIG. 3 to that of FIG. 2.
  • the corners, the later tips of the triangular lobes 10 are in the direction of the arrows 11 (Fig. 4) moved outward in the direction shown and pulled until the state of Fig. 3 is reached.
  • the double cardboard strip 8 is pressed together, the transverse sealing seam 9 is applied, the triangular flaps 10 are folded onto the floor and attached there by point heating, for example, so that the state of FIG. 2 is then reached.
  • the lid 2 is already sealed in a liquid-tight manner on the lower side of the package i-st in FIGS. 2 to 4.
  • the cover 2 which is preferably, but not necessarily, made up of round, is constructed only from thermoplastic material and without a carrier material. Therefore, the cover can be injection molded along the outer edge 12 of the tube or the side walls 1 shown in FIG. 5, in the shape of the use form, as shown in FIG. 1.
  • the transport configuration is shown in FIG. 5, in which the pouring device, generally designated 13, is folded inward within the outer contour of the pack such that no individual parts of the pouring device 13 protrude beyond the outer edge 6. This ensures perfect stability and good outer packaging (using shrink films or the like).
  • the pouring device 13 is seated centrally on the cover 2 in the form of an annular collar 14 which stands upwards outwards, as shown in FIG. 1, the upper edge 15 of which has a Plug 16 is connected to a welded gripping ring 17.
  • the exact shape after the cover 2 has been sprayed can be seen clearly from FIG. 6.
  • the upper edge 6 of the cover 2 is practically only a ring, on the outside of which a support wedge 18 is formed such that the top of the tube or the side wall 1 is below the edge 12 shown in FIG. 5 comes to lie around this support wedge 18.
  • This provides a particularly strong and rigid connection between cover 2 and side wall 1.
  • a weakening line 22 is arranged in a ring, which forms a — almost 360 ° weak point around the sealing plug 16 so that it can be easily torn out to open the pack can be.
  • connection point 23 (FIG. 1) of the gripping ring 17, next to which a bulge 24 projecting inwards from the ring collar 14 toward the center is provided such that the wall of this bulge 24 extends according to FIG. 6 — and is separated from the environment only by the weakening line 22. If the user then tears open the weakening line 22 by tearing the gripping ring 17 (according to FIG. 6 upwards), then this breaks in the area of the bulge 24 first, so that air can advantageously get into the space under the cover 2.
  • the hinge 25 for the sealing plug 16 is formed in the vicinity of the point designated by 21.
  • the latter can therefore be drawn around the hinge according to FIG. 6 25 moved clockwise, ie rotated in the opening direction without that the plug 16 tears off immediately.
  • This enables advantageous resealability, particularly since the sealing plug 16 has an edge 26 which runs approximately parallel to the annular collar 14 and is only closed by the flat bottom 27.
  • the device for producing this pack has in detail a spraying machine 30 shown in FIG. 8, the upper part 31 and lower part 32 of which are enlarged and shown in section in FIG. 7.
  • a spraying machine 30 shown in FIG. 8, the upper part 31 and lower part 32 of which are enlarged and shown in section in FIG. 7.
  • the exact contour of the two mutually facing surfaces of the upper and lower parts 31, 32 results from machining in accordance with the design of the cover 2, so that it is sufficient to mention a few parts here: for example the funnel 33 for injecting plastic into the Cavity, the holder 34 for the forming die 35 and the calibration and sealing pieces 36 for sealing the plastic, preferably polyethylene, against lateral squeezing out past the mandrel-shaped lower part 32 of the injection mold.
  • an injection mold lower part 32 of one length can be replaced by one of a different length without the cover 2 having a different design and the rest of the injection molding machine having different parts.
  • FIG. 8 On a frame 40 there is the winding 41 on the left side of the carrier material web 42, which is thinly coated on both sides with plastic, preferably polyethylene, and is rotatably supported here on the bearings 43.
  • an endless conveyor 44 On the upper right half, an endless conveyor 44 is shown schematically, which is provided with drives in a manner known per se and can be a station chain conveyor. The upper and lower runs of the conveyor 44 are horizontal and at a distance to the right of the paper roll 41 a holder 45 is attached, on the left side of which knives in the form of round knives 46 are rotatably mounted, with which the webs of the carrier material 42 can be separated.
  • a pre-bending station for creating packaging edges, behind which a first deflection roller 48 is arranged, above which a second deflection roller 49 is located.
  • a sealing jaw 50 with a counterpart not shown in detail is shown schematically; with the help of which a plastic strip 52 pulled off from a roll 51 is sealed along the cut edge for LS protection so that a direct contact edge between paper and liquid is not possible there when packaging liquids.
  • the tube forming station 53 which is described in more detail below, is attached between the last-mentioned LS sealing station 50-52 and the injection molding machine 30 fastened to the holder 45 on the right.
  • An essential element here is the calibration mandrel 54, which is covered by the tube shown here and which is designated 54 at the location of its arrangement under the tube.
  • This calibration mandrel 54 lies with its axis at 45 ° to the horizontal ..
  • the mandrel wheel, generally designated 55 with the eight mandrel-shaped injection mold lower parts 32 is arranged.
  • the holder 45 Piston filler 56 and furthermore, to the right, only schematically arranged the block bottom welding station designated 57.
  • a mold driver 58 is shown schematically, only at two points, which is attached to the conveyor 44 at a distance a from the respectively adjacent mold driver and is advanced with it in the direction of arrow 59 under the block bottom welding or closing station 57 .
  • the tube forming station 53 consists in detail of a holder 60, likewise arranged at 45 ° to the horizontal which the shaping or calibrating mandrel 54 is fastened via the mandrel curvature part 61.
  • the coated paper web 42 placed right below the guide pulley 49, the coated paper web 42 in the form of a downwardly open cup around. The lower right end of this shell rests under tension within the outer ring 62, which is also attached coaxially to the calibration mandrel 54.
  • a longitudinal sealing jaw 63 is provided behind the outer ring 62 and a transport jaw 64 is spaced further behind.
  • the latter oscillates with the cycle of the entire device in accordance with the double arrow 65.
  • the calibration mandrel 54 extends a section length A further in the conveying direction, namely — to the cutting device 66, which is indicated schematically here in the form of two knives, but actually has a circular knife can be an internally arranged counter knife to exert a scissor effect.
  • the mandrel wheel 55 is downstream of the tube forming station 53. It is in the direction of the arrow shown, i.e. clockwise, rotatable about the central axis, in cycles, i.e. intermittently, wherein - one cycle at a time moves a mandrel-shaped injection mold lower part 32 by 45 ° in the clockwise direction.
  • Each lower part 32 carries an annular stop 70 which is driven in an oscillating manner in the axial direction of the mandrel-shaped injection mold lower part 32 in order to exert a scraper effect. In the lowest position, designated III, the stop or scraper ring 70 is in its lowest position.
  • the respective injection mold lower part 32 stands vertically below the injection machine 30, as in the arrangement according to FIG. 7.
  • the injection mold upper part 31 can move vertically upwards and downwards with one stroke move (so that it releases the freshly sprayed lid 2 can be lifted off the respective lower part 32), which is greater than the oscillation stroke of the injection cylinder 80 with dosing plunger 81 and granulate container 82.
  • the closing station 57 with the device 90 for closing the bottom side, the device 91 for preparing the triangular tabs 10 for contacting the bottom 3, the device 92 for heating the triangular tabs 10 and the device 93 with the pressure stamps for the triangular lobes 10.
  • the package shown on the upper run of the conveyor 44 is, so to speak, upside down; because the cover 2 can be seen at the bottom, while the end wall which later forms the bottom 3 is at the top. For this reason, after the filled and closed package has been removed in the direction of arrow 59, the package is turned so that the top side comes up.
  • the machine is operated in such a way that the paper web 42 is separated, for example by the roller knives 46, into three separate webs lying next to one another, each of which is fed to the same device as shown overall in FIG. 8.
  • the paper web 42 is pre-bent by the device 47 into the edges which have not yet been pre-embossed, then deflected by the roller 48 and guided into the edge protection station 50, where the plastic strip 52 pulled off the roller 51 is pulled off the plastic edge on the edge 42 of the web 42 is sealed with the help of the sealing jaw 50.
  • the paper web prepared in this way is deflected over the deflection roller 49 to the bottom right so that the direction of transport now points from the upper outer circumference of the deflection roller 49 through the axis of the calibration mandrel 54 g to the center of the mandrel wheel 55. Due to the tension, which is generated by the transport jaws 64, the paper web 42 initially wraps around the mandrel attachment 41 in a semi-circular manner like a shell which is open at the bottom, and then around the potash Brierdorn 54 to completely enclose the inner ring to the outer ring 62.
  • This enclosing provides the tube shape and takes place in such a way that the two free edges of the tube overlap to a certain extent so that the longitudinal sealing seam 4 can be applied at this overlap point with the aid of the sealing jaws 63.
  • the tube section with length A is stationary.
  • the transport jaws 64 pull the next front tube section towards the mandrel wheel 55 by a section length A, so that the tube section under consideration, in which the longitudinal sealing seam has just been completed, comes to the lower right end of the calibration mandrel 54.
  • the cutting device 66 now separates it from that part which has just been pushed onto the mandrel-shaped injection mold lower part 32 as far as the stop 70 by the activity of the transport jaws 64 described last.
  • the tube section under consideration is then pushed over by the knife device 66 onto the mandrel-shaped lower part 32 of the injection mold in position I.
  • the lower part 32 has a diameter that is approximately 0.5 mm smaller than the calibration mandrel 54.
  • the mandrel wheel 55 now rotates by one cycle, i.e. 45 ° clockwise so that the tube section under consideration now reaches station II under the spraying machine 30.
  • the injection mold upper part 31 moves into the position shown in FIG. 7 while gripping around the upper edge of the tube or the side wall 1.
  • the cover 2 is molded directly onto the upper edge 12 of the side walls 1.
  • the injection mold upper part 31 or the further injection mandrel 35 then moves off the cover 2, and the mandrel wheel 55 can then move by 180 to the position III, the cover being cooled with the fresh molded part at the same time.
  • the mandrel wheel 55 is set and synchronized with the other stations 52, 30 and with the form driver 58 so that there are exactly identical positions between the axes of the opposite parts in the individual stations, in particular stations I, II and III.
  • the annular stop 70 works as a scraper and pushes the tube section under consideration, which is closed on one end side by the cover 2, downwards in the direction of the conveyor 44, specifically into the form driver 58.
  • This is initially in the embodiment as shown in Fig. 1, i.e. with a round lid and square bottom, opened to allow the more extensive or larger lid-2 to pass, and then closes on the smaller square area.
  • the ring 70 presses the lid with the aid of the rigid side wall 1 onto the upper run of the conveyor 44 in such a way that the lid 2 folds into the transport configuration shown in FIG. This folding in is no problem because the package is still empty.
  • the station chain conveyor 44 now conveys the above-still open and ready-to-fill pack in the direction of the arrow 59 to the right, one form driver 58 being at a distance a from the next.
  • the pack passes under the filling station 56, which is designed as a piston filler, and is filled up to the lower edge 7.
  • the filling station 56 which is designed as a piston filler
  • the bottom side of the state of FIG. 4 is closed in that of FIG. 3.
  • the triangular flaps 10 prepared for application are then heated in the station 92 and attached to the floor 3 with the device 93 by means of pressure stamps in such a way that the shape of FIG. 2 results.
  • the triangular flaps mentioned can be folded over onto the floor itself or a side wall, depending on the design of the block bottom closure.
  • the lid which is made only of thermoplastic material, is arranged, the ring collar of which can be circular, oval, polygonal or the like and protrudes outwards.
  • the ring collar is arranged in the center. With other lid shapes, the ring collar can also be arranged laterally near the edge so that the pouring edge has to be closer to the edge of the lid when pouring.
  • all parts of the opening device are preferably inside the outer contour of the pack, because this provides an optimal design for transport.
  • the embodiment shown in the figures shows a gripping ring which is inclined at an angle of 30 ° and is formed on the sealing plug.
  • Particularly expedient is an embodiment not shown in the figures, in which the gripping ring is molded turned around by 180 °.
  • the main plane in the gripping ring lies parallel to the outer edge of the pack or parallel to the plane which is caused by the Lid edge runs. Nevertheless, the Greirring is still in its transport form within the outer contour of the pack.
  • the arrangement of the gripping ring in the position rotated 180 ° out of the sealing plug is therefore expedient because - in this way the injection mold for creating the cover can be made simpler.
  • the choice of the lid shape can be subjected to certain variations in accordance with the injection mold.
  • the pouring opening could be formed on an accordion or bellows-shaped device.
  • the main thing is the "bottom cover form" for the transport of the pack or the "cover form” when pouring.
  • the invention is especially for that consist only of thermoplastic material the lid was given the opportunity to create many desired opening arrangements while also utilizing the cold deformation options in order to give the lid different shapes, for example the optimal shape for transport on the one hand and the optimal shape for the pouring process on the other hand.
  • cold deformation can be understood as pushing the cover into the transport shape or pulling it out into the use form.
  • FIGS. 9 to 11 it can be seen that the end walls 1a, 1b, 1c and 1d are connected in a tube shape by a longitudinal sealing seam 4a lying in a corner. Due to the broken-off representation of the tube in FIGS. 9 to 14, the bottom 3a can only be seen in FIGS. 10 and 11 on the one hand and FIG. 14 on the other hand.
  • the lower edge 7a With the respectively adjacent lower edges 7b, which are arranged between them and extend perpendicular to them. Furthermore, at the level of the tip of the triangular flaps 10a and 10b, folding edges are provided all around, which are provided to form the transverse sealing seam 9a according to FIGS. 10 and 11. Above the edges 7a and 7b, the all-round field is formed, apart from the triangular tabs 10a and 10b, by two mutually opposite adjacent bottom wall parts 100a and 100b and four likewise opposite triangular fields 101a and 101b.
  • the two opposite triangular flaps 10a and 10b are first folded down around the lower edges 7a inwards, ie towards each other, so that the two short folding flaps th 102 move toward each other and the shaft in tight N achbar- remain next to each other, as can be seen from the perspective plan view of Fig. 10.
  • the adjacent bottom wall parts 101a and 101b have been taken along when the triangular flaps 10a and 10b are folded in, thereby simultaneously taking the two adjacent square bottom wall parts 100a and 100b with them in such a way that they ultimately reach the position according to FIG. 10. If the transverse sealing seam 9a is then folded over onto the level of the bottom 3a, the final state according to FIG. 11 is reached.
  • FIGS. 12 to 14 A similar design of the floor can be found in the other embodiment according to FIGS. 12 to 14. Numerous lines and fields are similar to the embodiment according to FIGS. 9 to 11, so that a brief description is sufficient here.
  • the two opposite triangular lobes 10a and 10b can again be seen in FIG. 12, but because of this star-shaped arrangement also in FIGS. 13 and 14.
  • the total of eight triangular base wall parts arranged between them have no reference numbers in FIG. 12. However, when the triangular flaps 10a, 10b, 10c and 10d are folded in, they form double-laid, triangular base wall parts, which can be seen in FIGS. 13 and 14 and are labeled 102a to 102d.
  • Fig. 13 it can be seen that the common center 103 can easily be sealed liquid-tight by a plastic sealing drop, which is not shown in the drawings, whereby the four triangular tabs 10a to 10d are connected to one another at the same time.
  • FIGS. 15 and 16 corresponds to that of FIGS. 1 to 4, but with triangular tabs 10 which are bent outward onto the side walls 1a and sealed there. Otherwise, the parts designated in FIGS. 15 and 16 have the same reference numbers as in FIGS. 1 to 4. This manner of folding serves to additionally reinforce the lower part of the pack and thus to improve stability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)
EP83102214A 1982-05-07 1983-03-07 Emballage pour matériaux fluides, présentant un dispositif d'ouverture refermable Expired EP0093849B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3217156 1982-05-07
DE19823217156 DE3217156A1 (de) 1982-05-07 1982-05-07 Packung fuer fliessfaehige fuellgueter mit wieder verschliessbarer oeffnungsvorrichtung

Publications (3)

Publication Number Publication Date
EP0093849A2 true EP0093849A2 (fr) 1983-11-16
EP0093849A3 EP0093849A3 (en) 1984-10-03
EP0093849B1 EP0093849B1 (fr) 1988-06-01

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US (3) US4564139A (fr)
EP (1) EP0093849B1 (fr)
JP (1) JPS58203839A (fr)
DE (2) DE3217156A1 (fr)
ES (2) ES281867Y (fr)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005095A1 (fr) * 1988-11-04 1990-05-17 Giordano Magnoni Recipient avec une base plane et une surface laterale essentiellement cylindrique
DE4102021A1 (de) * 1991-01-24 1992-08-06 Pkl Verpackungssysteme Gmbh Faltschachtelpackung aus einem fluessigkeitsdichten, heisssiegelfaehig beschichteten kartonverbundmaterial, insbesondere al-kaschiertem kartonverbundmaterial
US6338235B1 (en) 1999-04-21 2002-01-15 Tetra Laval Holdings & Finance S.A. Method of producing packaging containers with low bacteria contamination
US7516599B2 (en) 2005-11-07 2009-04-14 Kraft Foods Global Brands Llc Methods and apparatus for manufacture of a reclosable plastic carton
CN107264912A (zh) * 2016-04-04 2017-10-20 Sig技术股份公司 复合材料包装件、用于复合材料包装件的包装件层压制品以及包装套筒坯料
CN107264912B (zh) * 2016-04-04 2021-10-15 Sig技术股份公司 复合材料包装件、用于复合材料包装件的包装件层压制品以及包装套筒坯料

Also Published As

Publication number Publication date
DE3217156A1 (de) 1983-11-10
DE3376824D1 (en) 1988-07-07
ES275116U (es) 1984-08-01
US4834823A (en) 1989-05-30
EP0093849A3 (en) 1984-10-03
DE3217156C2 (fr) 1992-07-02
ES281867U (es) 1987-06-01
ES275116Y (es) 1985-03-16
ES281867Y (es) 1987-12-01
US4706874A (en) 1987-11-17
US4564139A (en) 1986-01-14
EP0093849B1 (fr) 1988-06-01
JPS58203839A (ja) 1983-11-28

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