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WO2005028329A2 - Process for producing a container with a reclosable outlet - Google Patents

Process for producing a container with a reclosable outlet Download PDF

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Publication number
WO2005028329A2
WO2005028329A2 PCT/IB2004/003102 IB2004003102W WO2005028329A2 WO 2005028329 A2 WO2005028329 A2 WO 2005028329A2 IB 2004003102 W IB2004003102 W IB 2004003102W WO 2005028329 A2 WO2005028329 A2 WO 2005028329A2
Authority
WO
WIPO (PCT)
Prior art keywords
container
reclosure
region
area
wall
Prior art date
Application number
PCT/IB2004/003102
Other languages
German (de)
French (fr)
Other versions
WO2005028329A3 (en
Original Assignee
Plast Competence Center Ag
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 Plast Competence Center Ag filed Critical Plast Competence Center Ag
Publication of WO2005028329A2 publication Critical patent/WO2005028329A2/en
Publication of WO2005028329A3 publication Critical patent/WO2005028329A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0081—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • 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
    • B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/02—Body construction
    • B65D35/12—Connections between body and closure-receiving bush
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • B65D51/22—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure
    • B65D51/228—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure a major part of the inner closure being removed from the container after the opening
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1601—Making multilayered or multicoloured articles the injected materials not being adhered or bonded to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2001/00—Articles provided with screw threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0071—Lower closure of the 17-type

Definitions

  • the invention relates to a method for producing a reclosable container by injection molding and a container produced by this method.
  • EP 1033318 discloses a method for producing a two-layer tube shoulder, in which a tube shoulder is produced in a first mold, which is then molded in a form-fitting manner with a layer of another material in a second injection mold, through which the tube shoulder should receive a diffusion barrier.
  • the positive connection resulting from the extrusion coating is intended to prevent the mutual detachment of materials that do not adhere to one another.
  • a toothpaste tube with its reclosure require a particularly complex and extensive process system, since they produce the front area of the container, a piece of film to be sealed on the front side of the container as a guarantee closure and the reclosure separately and require funding and assembly means to bring these parts together and together connect.
  • a container is also known from EP 0178377, the shoulder area of which merges into a nozzle part designed for dispensing a spreadable material, on the outer end of which a tear-off closure provided with a lateral grip tab is integrally formed.
  • the invention is based on the object of finding a method for producing a container and its reclosure which can be carried out with a system which is considerably simpler than known production systems, so that before costs are saved both for the provision of a process plant and for the manufacture of the container with its reclosure.
  • the invention is based on the object of finding a container which is particularly suitable for toothpaste, pharmaceuticals and foodstuffs and can be produced inexpensively and in which the integrity of its contents can be easily recognized without opening its resealable container.
  • FIG. 1 shows a sector-like cut-out perspective representation of a front container area with a molded reclosure, with a cutting angle offset for the reclosure
  • FIG. 2 shows a top view of the emptying nozzle of the container according to FIG. 1 before the resealable is formed
  • FIG. 3 shows a side view of the arrangement according to FIG. 1,
  • FIG. 4 shows a radial section of an injection mold for producing the front container area according to FIG. 1 with its unshaded illustration
  • FIG. 5 shows the front container area arranged on an inner molded part of an injection mold in accordance with the illustration in FIG. 4 after a reclosure has been molded on by an outer molded part placed on it.
  • the front container area 1 extends from a closure wall 3 closing the emptying opening 2 via an emptying nozzle 4 and a shoulder area 5 to a circumferential skirt edge 6, which is known per se for welding is provided with a tubular container jacket, not shown.
  • the front container Area 1 has a circumferential groove 7 into which an edge area 8 of the reclosure 9 molded onto the front container area 1 engages.
  • This groove 7 has a connection to the front outer side 10 of the front container area 1 at several narrowly limited points on the circumference of the container, so that when the reclosure 9 is formed, axially directed separating webs 11 are formed at these points, via which the reclosure on its circumferential area on the front container area 1 is anchored.
  • the predetermined separating webs 11 thus form a closure which is clearly visible from the outside, so that their integrity guarantees that the container contents and also the front container region 1 with emptying nozzle 4 and shoulder region 5 have remained unaffected before the first opening.
  • This guarantee closure which is consequently effective for the entire front container area 1, makes the container particularly suitable for pharmaceuticals, since the sterility of the front outer area of the container is also of particular importance for such.
  • At least one predetermined separating point 12 is also provided on the circumference of the closing wall 3 of the emptying nozzle 4 which closes the emptying opening 2 and which, for example, consists of a very narrowly defined one, which is located below the outer edge 13 of the circular closing wall 3 the peripheral inner edge 14 connecting material region 15, which can be easily separated when opening the reclosure 9, but on the other hand guarantees a tight seal on the emptying nozzle 4.
  • the detachment of the closure wall 3 from the emptying nozzle 4 by the first opening movement of the reclosure 9 results from an inseparable and non-rotatable inclusion of the closure wall 3 in the cover wall 16 of the reclosure 9.
  • the closure wall 3 projecting beyond the opening level has at least one circumferentially directed groove 17 and at least one recess 18 into which the material of the lid wall 16 penetrates when the reclosure 9 is molded onto the front region 1 of the container in the molding tool according to FIG.
  • the reclosure 9 engages to reclose the container by means of a screw thread 19 which is located between the emptying tube. zen 4 and the inner cap 20 of the reclosure 9 is provided.
  • other engagement means or latching means can also be provided between the front container area 1 and the reclosure 9 in order to secure the reclosure on the container again.
  • the reclosure 9 is provided at a distance from the inner cap 20 with an axial grip ribs 21 having a grip wall 22 which extends in continuation of the container shell. Because of its substantially larger diameter than the inner cap 20, it can be enclosed by one hand, so that the force required to open and destroy the predetermined separating webs 11 can be easily applied.
  • the front container region 1 is produced by a molding tool which is carried out in a customary manner, as shown in FIG. 4, so that it is injected with plastic into the mold cavity between the one-piece inner molded part (mold core) 23 and two outer molded parts 24 which can be moved apart like a jaw. 25 is formed.
  • a one-piece outer molded part 28 is pushed in the axial direction over the previously produced front container region 1 so that the reclosure 9 is formed, so that between its shaping inner wall 29 and the front container area 1, a closed mold space for the formation and molding of the reclosure (9) is formed.
  • the latter consists of a different material that is slidable on the former.
  • a suitable material composition for example, consists of polyethylene and polypropylene.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Tubes (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Closures For Containers (AREA)

Abstract

According to this process, the reclosable outlet (9) of a container is moulded on the front zone (1) of an injection moulding, dispensing with a remote, independent, two-part moulding tool to produce the reclosable outlet (9). The use of materials that slide on one another makes the opening movement possible in spite of the moulding. Moreover, moulding makes a cost-effective and functionally advantageous design of the reclosable outlet (9) possible, including a double tamper-proof sealing system.

Description

Verfahren zur Herstellung eines Behälters mit Wiederverschluss Process for making a reclosable container
Die Erfindung betrifft ein Verfahren zur Herstellung eines Behälters mit Wiederverschluss durch Spritzgiessen und einen nach diesem Verfahren hergestellten Behälter.The invention relates to a method for producing a reclosable container by injection molding and a container produced by this method.
Durch die EP 1033318 (US 6464921 ) ist ein Verfahren zur Herstellung einer zweischichtigen Tubenschulter bekannt, bei dem in einer ersten Form eine Tubenschulter hergestellt wird, die anschliessend in einer zweiten Spritzgiessform formschlüssig mit einer Schicht aus einem anderen Material umspritzt wird, durch das die Tubenschulter eine Diffusionssperre erhalten soll. Die sich durch das Umspritzen ergebende formschlüssige Verbindung soll die gegenseitige Ablösung von nicht aneinander haftenden Materialien verhindern.EP 1033318 (US 6464921) discloses a method for producing a two-layer tube shoulder, in which a tube shoulder is produced in a first mold, which is then molded in a form-fitting manner with a layer of another material in a second injection mold, through which the tube shoulder should receive a diffusion barrier. The positive connection resulting from the extrusion coating is intended to prevent the mutual detachment of materials that do not adhere to one another.
Aktuell benutzte Verfahren zur Herstellung. Z.B. einer Zahnpastatube mit deren Wiederverschluss benötigen eine besonders aufwändige und umfangreiche Verfahrensanlage, da sie den vorderen Bereich des Behälters, einen auf die Stirnseite des Behälters als Garantieverschluss aufzusiegelndes Folienstück und den Wiederverschluss voneinander getrennt herstellen und Fördermittel und Montagemittel benötigen, um diese Teile zusammenzuführen und miteinander zu verbinden.Manufacturing processes currently used. For example, a toothpaste tube with its reclosure require a particularly complex and extensive process system, since they produce the front area of the container, a piece of film to be sealed on the front side of the container as a guarantee closure and the reclosure separately and require funding and assembly means to bring these parts together and together connect.
Durch die EP 0178377 ist auch ein Behälter bekannt, dessen Schulterbereich in einen zur Ausbringung eines streichfähigen Materials ausgeführten Düsenteil übergeht, an dessen äusserem Ende ein mit seitlichem Grifflappen versehener Abreiss- verschluss einstückig angeformt ist. Dadurch entfällt zwar die separate Herstellung eines Garantieverschlussteiles, jedoch muss die den Düsenteil mit Abstand um- schliessende Schraubkappe separat hergestellt, gespeichert, zugeführt und am Behälter montiert werden.A container is also known from EP 0178377, the shoulder area of which merges into a nozzle part designed for dispensing a spreadable material, on the outer end of which a tear-off closure provided with a lateral grip tab is integrally formed. Although this eliminates the separate manufacture of a guarantee closure part, the screw cap which surrounds the nozzle part at a distance must be manufactured, stored, supplied and mounted on the container separately.
Der Erfindung liegt die Aufgabe zugrunde ein Verfahren zur Herstellung eines Behälters und seines Wiederverschlusses zu finden, das mit einer gegenüber bekannten Herstellungsanlagen wesentlich einfacheren Anlage ausführbar ist, so dass erhebli- ehe Kosten sowohl für die Bereitstellung einer Verfahrensanlage als auch bei der Herstellung des Behälters mit seinem Wiederverschluss eingespart werden. Ausserdem liegt der Erfindung die Aufgabe zugrunde einen insbesondere für Zahnpasta, Pharmaka und Lebensmittel geeigneten, preisgünstig herstellbaren Behälter zu finden, bei dem die Unversehrtheit seines Inhaltes ohne Öffnen seines Wiederverschluss leicht erkennbar ist.The invention is based on the object of finding a method for producing a container and its reclosure which can be carried out with a system which is considerably simpler than known production systems, so that before costs are saved both for the provision of a process plant and for the manufacture of the container with its reclosure. In addition, the invention is based on the object of finding a container which is particularly suitable for toothpaste, pharmaceuticals and foodstuffs and can be produced inexpensively and in which the integrity of its contents can be easily recognized without opening its resealable container.
Die Lösung dieser Aufgaben erfolgt aufgrund der Merkmale der Patentansprüche 1 und 5. Vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der abhängigen Patentansprüche und der folgenden Beschreibung an Hand der Zeichnungen zu entnehmen. Es zeigt:These objects are achieved on the basis of the features of patent claims 1 and 5. Advantageous embodiments of the invention are the subject of the dependent patent claims and the following description based on the drawings. It shows:
Fig.1 eine sektorförmig ausgeschnitte perspektivische Darstellung eines vorderen Behälterbereichs mit angeformtem Wiederverschluss, mit für den Wiederverschluss versetztem Schnittwinkel,1 shows a sector-like cut-out perspective representation of a front container area with a molded reclosure, with a cutting angle offset for the reclosure,
Fig.2 eine Aufsicht auf den Entleerungsstutzen des Behälters nach Fig.1 vor dem Anformen des Wiederverschlusses,2 shows a top view of the emptying nozzle of the container according to FIG. 1 before the resealable is formed,
Fig.3 eine Seitenansicht der Anordnung nach Fig.1 ,3 shows a side view of the arrangement according to FIG. 1,
Fig.4 einen Radialschnitt einer Spritzgiessform zur Herstellung des vorderen Behälterbereichs nach Fig.1 mit dessen unschraffierter Darstellung und4 shows a radial section of an injection mold for producing the front container area according to FIG. 1 with its unshaded illustration and
Fig.5 den auf einen inneren Formteil einer Spritzgiessform angeordneten vorderen Behälterbereich entsprechend der Darstellung in Fig. 4 nach Anformung eines Wiederverschlusses durch eine aufgesetzten äusseren Formteil.5 shows the front container area arranged on an inner molded part of an injection mold in accordance with the illustration in FIG. 4 after a reclosure has been molded on by an outer molded part placed on it.
Wie die Darstellungen der Fig.1 , 4 und 5 zeigen, verläuft der vordere Behälterbereich 1 von einer die Entleerungsöffnung 2 verschliessenden Verschlusswand 3 über einen Entleerungsstutzen 4 und einen Schulterbereich 5 bis zu einem umlaufenden Schürzenrand 6, der auf an sich bekannte Weise für die Verschweissung mit einem nicht dargestellten, schlauchförmigen Behältermantel vorgesehen ist. Vor dem Schürzenrand 6 bzw. angrenzend an den Behältermantel hat der vordere Behälter- bereich 1 eine umlaufende Rille 7, in die ein Randbereich 8 des an den vorderen Behälterbereich 1 angeformten Wiederverschlusses 9 eingreift. Diese Rille 7 hat an mehreren engbegrenzten Stellen des Behälterumfanges eine Verbindung zur vorderen Aussenseite 10 des vorderen Behälterbereichs 1 , so dass sich beim Anformen des Wiederverschlusses 9 an diesen Stellen axial gerichtete Solltrennstege 11 ausbilden, über die der Wiederverschluss an seinem Umfangsbereich an dem vorderen Behälterbereich 1 verankert ist. Somit bilden die Solltrennstege 11 einen von aussen gut sichtbaren Verschluss, so dass deren Unversehrtheit garantiert, dass der Behälterinhalt und auch der vordere Behälterbereich 1 mit Entleerungsstutzen 4 und Schulterbereich 5 vor dem erstmaligen Öffnen unberührt geblieben sind. Dieser folglich für den gesamten vorderen Behälterbereich 1 wirksame Garantieverschluss macht den Behälter besonders auch für Pharmaka geeignet, da für solche auch die Sterilität des vorderen Aussenbereichs des Behälters von besonderer Bedeutung ist.1, 4 and 5 show, the front container area 1 extends from a closure wall 3 closing the emptying opening 2 via an emptying nozzle 4 and a shoulder area 5 to a circumferential skirt edge 6, which is known per se for welding is provided with a tubular container jacket, not shown. In front of the skirt edge 6 or adjacent to the container jacket, the front container Area 1 has a circumferential groove 7 into which an edge area 8 of the reclosure 9 molded onto the front container area 1 engages. This groove 7 has a connection to the front outer side 10 of the front container area 1 at several narrowly limited points on the circumference of the container, so that when the reclosure 9 is formed, axially directed separating webs 11 are formed at these points, via which the reclosure on its circumferential area on the front container area 1 is anchored. The predetermined separating webs 11 thus form a closure which is clearly visible from the outside, so that their integrity guarantees that the container contents and also the front container region 1 with emptying nozzle 4 and shoulder region 5 have remained unaffected before the first opening. This guarantee closure, which is consequently effective for the entire front container area 1, makes the container particularly suitable for pharmaceuticals, since the sterility of the front outer area of the container is also of particular importance for such.
Zusätzlich zu solchem Garantieverschluss über die aussen am Wiederverschluss 9 sichtbaren Solltrennstege 11 ist auch am Umfang der die Entleerungsöffnung 2 verschliessenden Verschlusswand 3 des Entleerungsstutzens 4 mindestens eine Solltrennstelle 12 vorgesehen, die beispielsweise aus einem sehr eng begrenzten, die unter Aussenkante 13 der kreisförmigen Verschlusswand 3 mit der umlaufenden Innenkante 14 verbindenden Materialbereich 15 besteht, der sich beim Öffnen des Wiederverschlusses 9 leicht zertrennen lässt, aber andererseits am Entleerungsstutzen 4 einen dichten Verschluss garantiert.In addition to such a guarantee closure via the predetermined separating webs 11 which are visible on the outside of the reclosure 9, at least one predetermined separating point 12 is also provided on the circumference of the closing wall 3 of the emptying nozzle 4 which closes the emptying opening 2 and which, for example, consists of a very narrowly defined one, which is located below the outer edge 13 of the circular closing wall 3 the peripheral inner edge 14 connecting material region 15, which can be easily separated when opening the reclosure 9, but on the other hand guarantees a tight seal on the emptying nozzle 4.
Das Ablösen der Verschlusswand 3 vom Entleerungsstutzen 4 durch die erste Öffnungsbewegung des Wiederverschlusses 9 ergibt sich durch einen unlösbaren und verdrehfesten Einschluss der Verschlusswand 3 in der Deckelwand 16 des Wiederverschlusses 9. Hierzu hat die über die Öffnungsebene abstehende Verschlusswand 3 mindestens eine umlaufend gerichtete Rille 17 und mindestens eine Vertiefung 18, in die das Material der Deckelwand 16 eindringt, wenn der Wiederverschluss 9 in dem Formwerkzeug entsprechend Fig.5 an den Vorderbereich 1 des Behälters angeformt wird.The detachment of the closure wall 3 from the emptying nozzle 4 by the first opening movement of the reclosure 9 results from an inseparable and non-rotatable inclusion of the closure wall 3 in the cover wall 16 of the reclosure 9. For this purpose, the closure wall 3 projecting beyond the opening level has at least one circumferentially directed groove 17 and at least one recess 18 into which the material of the lid wall 16 penetrates when the reclosure 9 is molded onto the front region 1 of the container in the molding tool according to FIG.
Der für ein erneutes Schliessen des Behälters erforderliche Eingriff des Wiederverschlusses 9 erfolgt über ein Schraubgewinde 19, das zwischen dem Entleerungsstut- zen 4 und der Innenkappe 20 des Wiederverschlusses 9 vorgesehen ist. Es versteht sich jedoch, dass zwischen dem vorderen Behälterbereich 1 und dem Wiederverschluss 9 auch andere Eingriffsmittel oder Rastmittel vorgesehen sein können, um den Wiederverschluss erneut am Behälter zu sichern.The reclosure 9 engages to reclose the container by means of a screw thread 19 which is located between the emptying tube. zen 4 and the inner cap 20 of the reclosure 9 is provided. However, it goes without saying that other engagement means or latching means can also be provided between the front container area 1 and the reclosure 9 in order to secure the reclosure on the container again.
Nach aussen ist der Wiederverschluss 9 in Abstand von der Innenkappe 20 mit einer axiale Griffrippen 21 aufweisenden Griffwand 22 versehen, die sich in Fortsetzung des Behältermantels erstreckt. Aufgrund ihres gegenüber der Innenkappe 20 wesentlichen grösseren Durchmessers kann sie von einer Hand umschlossen werden, so dass die zum Erstöffnen und Zerstören der Solltrennstege 11 erforderliche Kraft leicht aufgebracht werden kann.To the outside, the reclosure 9 is provided at a distance from the inner cap 20 with an axial grip ribs 21 having a grip wall 22 which extends in continuation of the container shell. Because of its substantially larger diameter than the inner cap 20, it can be enclosed by one hand, so that the force required to open and destroy the predetermined separating webs 11 can be easily applied.
Die Herstellung des vorderen Behälterbereichs 1 erfolgt durch ein in üblicher Weise ausgeführtes Formwerkzeug entsprechend der Darstellung in Fig. 4, so dass es durch Einspritzen von Kunststoff in den Formhohlraum zwischen dem einteiligen inneren Formteil (Formkern) 23 und zwei backenartig auseinander bewegbaren äusseren Formteilen 24,25 ausgeformt wird. Nach Öffnen und damit Entfernen der äusseren Formteiie 24,25 in Richtung der Pfeile 26,27 wird zur Anformung des Wiederverschlusses 9 ein einteiliger äusserer Formteil 28 in axialer Richtung über den zuvor hergestellten vorderen Behälterbereich 1 geschoben, so dass zwischen seiner formgebenden Innenwand 29 und dem vorderen Behälterbereich 1 ein geschlossener Formraum für die Ausbildung und Anformung des Wiederverschlusses (9) gebildet wird.The front container region 1 is produced by a molding tool which is carried out in a customary manner, as shown in FIG. 4, so that it is injected with plastic into the mold cavity between the one-piece inner molded part (mold core) 23 and two outer molded parts 24 which can be moved apart like a jaw. 25 is formed. After opening and thus removing the outer molded parts 24, 25 in the direction of the arrows 26, 27, a one-piece outer molded part 28 is pushed in the axial direction over the previously produced front container region 1 so that the reclosure 9 is formed, so that between its shaping inner wall 29 and the front container area 1, a closed mold space for the formation and molding of the reclosure (9) is formed.
Damit der im Formwerkzeug 28 an den vorderen Behälterbereich 1 angeformte Wiederverschluss nicht an diesem derart anhaftet, so dass sein leichtes Öffnen verhindert wird, besteht dieser aus einem anderen, an ersterem gleitfähigen Material. Eine hierzu beispielsweise geeignete Materialkomposition besteht aus Polyethylen und Polypropylen. So that the reclosure formed on the front container region 1 in the molding tool 28 does not adhere to the front container region 1 in such a way that its easy opening is prevented, the latter consists of a different material that is slidable on the former. A suitable material composition, for example, consists of polyethylene and polypropylene.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung eines Behälters mit Wiederverschluss durch Spritz- giessen, wobei zumindest der vordere, eine Entleerungsöffnung aufweisende Bereich des Behälters und der Wiederverschluss aus unterschiedlichem Material hergestellt werden, dadurch gekennzeichnet, dass nach Fertigstellung eines vorderen Behälterbereichs dieser als innerer Formteil für die anschliessende Formung des Wiederverschlusses (9) dient, indem nach Aufsetzen eines äusseren Formteiles (28) der Wiederverschluss (9) im Formraum zwischen vorderem Behälterbereich (1 ) und äusserem Formteil (26) geformt wird, wobei die unterschiedlichen Materialien aneinander gleitfähig sind.1. A process for the production of a container with reclosure by injection molding, at least the front region of the container having an emptying opening and the reclosure being made of different material, characterized in that after the completion of a front container region, this is used as an inner molded part for the subsequent one Shaping the reclosure (9) is used in that after an outer molding (28) has been put on, the reclosure (9) is formed in the molding space between the front container region (1) and the outer molding (26), the different materials being able to slide against one another.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass beim Herstellen des vorderen Behälterbereichs (1 ) eine die Entleerungsöffnung verschliessende Verschlusswand (16) mit einer Profilierung (17,18) geformt wird, so dass beim Anformen des Wiederverschlusses (9) sich dieser mit der Verschlusswand (16) formschlüssig verbindet, wobei die Verschlusswand über (16) mindestens einen Solltrennbereich (15) mit dem vorderen Behälterbereich(l) verbunden ist.2. The method according to claim 1, characterized in that when the front container region (1) is produced, a closure wall (16) which closes the emptying opening is formed with a profile (17, 18), so that when the reclosure (9) is formed, the latter closes with it the closure wall (16) connects positively, the closure wall being connected to the front container region (1) via (16) at least one predetermined separation area (15).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der vordere Bereich (1 ) des Behälters bis zu einem hinteren, umlaufenden Schürzenrand (6) einstückig ausgebildet wird, wobei der Schürzenrand (6) anschliessend mit einer separat hergestellten Behälterkammer dicht verbunden wird.3. The method according to claim 1 or 2, characterized in that the front region (1) of the container is integrally formed up to a rear circumferential skirt edge (6), the skirt edge (6) then being tightly connected to a separately manufactured container chamber ,
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass bei der Herstellung des vorderen Bereichs (1) des Behälters im Bereich der angrenzenden Behälterwand eine umlaufend gerichtete Rille (7) eingeformt wird , so dass bei der anschliessenden Herstellung des Wiederverschlusses (9) sich ein Randbereich desselben in die Rille (7) unlösbar einformt, wobei zwischen diesem Randbereich und dem übrigen Teil des Wiederverschlusses mindestens ein Solltrennbereich 11 ) geformt wird..4. The method according to any one of claims 1 to 3, characterized in that a circumferential groove (7) is formed in the manufacture of the front region (1) of the container in the region of the adjacent container wall, so that in the subsequent production of the reclosure ( 9) an edge area of the same is permanently formed in the groove (7), at least one predetermined separation area 11) being formed between this edge area and the remaining part of the reclosure.
5. Behälter mit Wiederverschluss, hergestellt nach dem Verfahren des Anspruchs 1 , dadurch gekennzeichnet, dass der Wiederverschluss (9) sich bis zum äusseren Be- hältermantel erstreckend einen vorderen, eine Schulter (5) aufweisenden Bereich (1) des Behälters überdeckt und mit einem über mindestens eine Solltrennstelle (11 ) verbundenen äusseren Randteil (8) unlösbar am vorderen Behälterbereich U(1 ) verankert ist, wobei die Überdeckung über den gesamten vorderen Bereich (1) des Behälters in angeschmiegter Erstreckung verläuft und die unterschiedlichen Materialien aneinander gleitfähig sind.5. Container with reclosure, manufactured according to the method of claim 1, characterized in that the reclosure (9) is up to the outer loading The container jacket extends over a front region (1) of the container which has a shoulder (5) and is inextricably anchored to the front container region U (1) with an outer edge part (8) connected via at least one predetermined separation point (11), the covering covering the Entire front area (1) of the container runs in a snug extension and the different materials are slidable against each other.
6. Behälter nach Anspruch 5, dadurch gekennzeichnet, dass der die Behälteröffnung (2) aufweisende Bereich (4) des Behälters über mindestens einen Solltrennbereich (15) einstückig mit einem Verschlussteil (3) verbunden ist, der formschlüssig und verdrehfest mit dem Wiederverschluss (9) verbunden ist.6. The container as claimed in claim 5, characterized in that the region (4) of the container which has the container opening (2) is connected in one piece via at least one predetermined separation region (15) to a closure part (3) which is positively and non-rotatably connected to the reclosure (9 ) connected is.
7. Behälter nach Anspruch 6, dadurch gekennzeichnet, dass der vordere Behälterbereich (1 ) einen Entleerungsstutzen (4) aufweist und eine seine Öffnung (2) ver- schliessende Verschlusswand (3) formschlüssig mit dem Wiederverschluss (9) verbunden ist, wobei der mindestens eine Solltrennbereich (15) im Bereich der Stirnseite des Entleerungsstutzens (4) angeordnet ist.7. A container according to claim 6, characterized in that the front container region (1) has an emptying nozzle (4) and a closure wall (3) closing its opening (2) is positively connected to the reclosure (9), the at least a predetermined separation area (15) is arranged in the area of the end face of the emptying nozzle (4).
8. Behälter nach Anspruch 7, dadurch gekennzeichnet, dass der vordere Bereich des Behälters einen ein Aussengewinde aufweisenden Bereich (4) aufweist, mit dem der Wiederverschluss (9) eng anliegend vollständig in Eingriff steht.8. A container according to claim 7, characterized in that the front region of the container has an externally threaded region (4) with which the reclosure (9) is in tight engagement completely.
9. Behälter nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass der sich bis zum äusseren Behältermantel erstreckende Wiederverschluss (9) die Form einer nach aussen ringförmig offenen Kappe hat, indem eine Griffwand (22) des Wiederverschlusses (9) sich in Fortsetzung des Behältermantels erstreckt und ein die Entleerungsöffnung (2) umschliessender Innenbereich (20) des Wiederverschiusses (9) sich in radialem Abstand von dieser Griffwand (22) erstreckt. 9. Container according to one of claims 5 to 8, characterized in that the reclosure (9) extending up to the outer container jacket has the shape of a cap which is open to the outside in an annular manner by a handle wall (22) of the reclosure (9) being continued of the container shell and an inner region (20) of the reclosure (9) enclosing the emptying opening (2) extends at a radial distance from this handle wall (22).
PCT/IB2004/003102 2003-09-24 2004-09-22 Process for producing a container with a reclosable outlet WO2005028329A2 (en)

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DE2003144179 DE10344179A1 (en) 2003-09-24 2003-09-24 Method for producing a container with reclosure
DE10344179.4 2003-09-24

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WO2005028329A3 WO2005028329A3 (en) 2005-06-30

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