DE19538838A1 - Plastic closure cap moulding tool for forming internal projections and operation of tool - Google Patents

Plastic closure cap moulding tool for forming internal projections and operation of tool

Info

Publication number
DE19538838A1
DE19538838A1 DE1995138838 DE19538838A DE19538838A1 DE 19538838 A1 DE19538838 A1 DE 19538838A1 DE 1995138838 DE1995138838 DE 1995138838 DE 19538838 A DE19538838 A DE 19538838A DE 19538838 A1 DE19538838 A1 DE 19538838A1
Authority
DE
Germany
Prior art keywords
sleeves
central core
closure
sleeve
axially
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.)
Withdrawn
Application number
DE1995138838
Other languages
German (de)
Inventor
Gernot Mecks
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.)
Procter and Gamble Deutschland GmbH
Original Assignee
Wella GmbH
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 Wella GmbH filed Critical Wella GmbH
Priority to DE1995138838 priority Critical patent/DE19538838A1/en
Publication of DE19538838A1 publication Critical patent/DE19538838A1/en
Withdrawn legal-status Critical Current

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C2045/4485—Removing or ejecting moulded articles for undercut articles the undercut forming mould part being rotatable into the space made available by the translation movement of another mould part
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2618—Moulds having screw-threaded mould walls
    • B29C45/2622—Moulds having screw-threaded mould walls for moulding interrupted 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
    • 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

Landscapes

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

Abstract

A tool (1) for forming a plastic closure cap (2) with an annular part (4) and a cover (5) comprises a central core (6) surrounded at one end (7) by a collar (8) formed of axially aligned, L-shaped segments (9,10,11,12,13,14), adjacent segments forming collar segment pairs (9,10; 11,12; 13,14) which are connected to each other by their circumferential angled sections (15,16). A free space (17) between the opposing angled sections (15,16) of each segment pair (9,10;11,12;13,14) engages with internal projections (18) of the cap (2). Also claimed is a cap forming process, where plastic is injected onto the assembled collar (8) and after polymer solidification, an axially movable collar section (19) is withdrawn from the moulding (2) and then a second collar section (20) is rotated to release the moulded projections (18) and finally moved axially out of the moulding (2).

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur spritzgußtechnischen Herstellung von Kunststoffver­ schlüssen mit innenseitigen Rastnocken.The invention relates to an apparatus and a method for the injection molding of plastic ver conclusions with locking cams on the inside.

Es ist bekannt, Kunststoffverschlüsse mit innenseitigen Rastnocken spritzgußtechnisch an einem Zentralkern herzu­ stellen. Bei radialen Rastnockenstärken bis zu ca. 0,6 mm kann infolge der Verformbarkeit des Verschlusses der Zen­ tralkern aus dem Verschluß gezogen werden. Dabei rutschen die Rastnocken aus Freiräumen des Zentralkerns heraus und an der Mantelfläche des Zentralkerns entlang.It is known to have plastic closures on the inside Injection molding locking cams on a central core put. With radial locking cam thicknesses up to approx. 0.6 mm due to the deformability of the closure, the Zen tralkern be pulled out of the lock. Slip in the process the locking cams out of free spaces of the central core and along the lateral surface of the central core.

Für Rastnocken mit über 0,6 mm Rastnockenstärke ist dies nicht möglich. Hier werden deshalb zum einen nach innen zusammenfahrende Zentralkerne eingesetzt, um das Heraus­ ziehen des Zentralkerns aus den Verschlüssen zu ermöglichen. Zum anderen werden Schieber als Hilfsmittel zum Ablösen der Verschlüsse von einstückigen Zentralkernen verwendet.This is for locking cams with a locking cam thickness of more than 0.6 mm not possible. Here, on the one hand, are turned inside moving central cores used to get out to pull the central core out of the closures. On the other hand, sliders are used as an aid to Removal of the closures from one-piece central cores used.

Nachteilig ist beim bekannten Stand der Technik, daß die Verschlüsse entweder nicht auf starren, kostengünstigen Zentralkernen hergestellt oder nur mittels von außen ein­ greifender, aufwendiger Mittel vom Zentralkern geschoben werden können.A disadvantage of the known prior art is that Locks either on rigid, inexpensive Central cores manufactured or only by means of an outside gripping, elaborate means pushed from the central core can be.

Es liegt die Aufgabe zu Grunde, die erwähnten Nachteile dahingehend zu beseitigen, daß Kunststoffverschlüsse mit über 0,6 mm radialer Rastnockenstärke an einem starren Zentralkern ohne aufwendige, von außen eingreifende Mittel hergestellt werden können.It is based on the task, the disadvantages mentioned to eliminate that plastic closures with more than 0.6 mm radial locking cam thickness on a rigid  Central core without complex external means can be produced.

Gelöst ist die Aufgabe gemäß den kennzeichnenden Teilen der Ansprüche 1 und 3.The task is solved according to the characteristic parts of the Claims 1 and 3.

Bei der erfindungsgemäßen Vorrichtung (Anspruch 1) ist der Zentralkern an einem Ende in radialer Richtung von einem Hülsenkörper umgeben, ist der Hülsenkörper aus mehreren Hülsen gebildet, wobei jeweils zwei Hülsen axial zum Zen­ tralkern ausgerichtet sind und L-förmig mit Abwinklungen ineinander greifen und zwischen ihren Abwinklungen einen Freiraum für einen Rastnocken aussparen.In the device according to the invention (claim 1) Central core at one end in the radial direction from one Surrounded sleeve body, the sleeve body is made up of several Sleeves formed, with two sleeves axially to Zen tral core are aligned and L-shaped with bends interlock and unite between their angles Leave free space for a locking cam.

Bei einem Verfahren (Anspruch 3) zum Betreiben der erfin­ dungsgemäßen Vorrichtung wird zum Formen eines Verschlusses zunächst Kunststoff spritzgußtechnisch auf den geschlos­ senen Hülsenkörper aufgebracht. Nach dem Erstarren des Kunststoffs werden die Zughülsen axial aus dem erzeugten Verschluß herausgezogen. Sodann werden die Dreh- und Zug­ hülsen derart gedreht, daß ihre Abwinklungen die erzeugten Rastnocken freigeben. Schließlich werden die Dreh- und Zughülsen axial aus dem Verschluß herausgezogen.In a method (claim 3) for operating the inventions device according to the invention is used to form a closure first plastic injection molding on the closed applied its sleeve body. After the solidification of the Plastic, the tension sleeves are produced axially from the Closure pulled out. Then the twist and pull sleeves rotated so that their bends the generated Release the locking cams. Finally, the turning and Draw sleeves axially pulled out of the closure.

Die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren haben den Vorteil, daß die Verschlüsse auf einem kostengünstig herstellbaren, starren Zentralkern ohne auf­ wendige von außen eingreifende Mittel hergestellt und vom Zentralkern gelöst werden können.The device according to the invention and the invention Methods have the advantage that the closures on one Rigid central core that can be produced inexpensively without manoeuvrable external means and manufactured by Central core can be solved.

In einer vorteilhaften Ausgestaltung der Vorrichtung ist gemäß Anspruch 2 von jeweils zwei L-förmig ineinander greifenden Hülsen die eine Hülse als axial zum Zentralkern bewegbare Zughülse und die andere Hülse als axial und tan­ gential zum Zentralkern bewegbare Dreh- und Zughülse ausge­ staltet. Dies hat den Vorteil, daß das Entfernen des Hülsenkörpers einfach und gänzlich unabhängig von der Rast­ nockenstärke mittels leicht beweglicher Bauteile erfolgt. In an advantageous embodiment of the device according to claim 2 of two L-shaped one inside the other gripping sleeves the one sleeve as axial to the central core movable pull sleeve and the other sleeve than axial and tan Turnable and pull sleeve that can be moved to the central core shapes. This has the advantage that the removal of the Sleeve body simple and completely independent of the rest cam strength is done by means of easily movable components.  

Während die Zughülsen entfernt werden, halten die Dreh- und Zughülsen den Verschluß. Danach werden die Dreh- und Zug­ hülsen, zum Beispiel unter Ausnutzung der Trägheit des Verschlusses im Verschluß um einen kleinen Winkel gedreht und gegen die Haltekraft des Zentralkerns aus diesem entfernt.While the draw sleeves are removed, the twist and hold Tension sleeves the closure. After that, the twist and pull sleeves, for example using the inertia of the Lock in the lock rotated by a small angle and removed from the central core against the holding force.

Im folgenden werden die erfindungsgemäße Vorrichtung und das erfindungsgemäße Verfahren anhand von ein Ausführungs­ beispiel darstellenden Figuren näher beschrieben. Es zeigt:In the following the device and the inventive method based on an execution exemplifying figures described in more detail. It shows:

Fig. 1 in einer perspektivischen Ansicht, teilweise mit Radialschnitt, einen massiver Zentralkern, der konzentrisch von einem Hülsenkörper und darauf von einem Verschluß aus Kunststoff umgeben ist, sowie Fig. 1 in a perspective view, partially with a radial section, a solid central core which is concentrically surrounded by a sleeve body and thereon by a plastic closure, and

Fig. 2 in einer Draufsicht die Abwicklung des Hülsen­ körpers der Fig. 1, mit seinen L-förmig paarweise ineinander greifenden und jeweils einen Freiraum aussparenden Hülsen. Fig. 2 is a plan view of the development of the sleeve body of FIG. 1, with its L-shaped pairs of interlocking and each free space sleeves.

Mit einer erfindungsgemäßen Vorrichtung 1 wird ein Ver­ schluß 2 aus Kunststoff 3 hergestellt (Fig. 1). Der Ver­ schluß 2 besteht aus einem ringförmigen Verschlußteil 4 und einem das ringförmige Verschlußteil 4 abschließenden Deckelteil 5.With a device 1 according to the invention, a circuit 2 is made of plastic 3 ( FIG. 1). The circuit 2 consists of an annular closure part 4 and a cover part 5 closing the annular closure part 4 .

Auf einem Ende 7 eines starren, massiven Zentralkern 6 befindet sich ein den Zentralkern 6 ummantelnder Hülsen­ körper 8. Der Hülsenkörper 8 besteht aus mehreren einzelnen Hülsen 9, 10, 11, 12, 13, 14. Jeweils zwei Hülsen 9, 10; 11, 12; 13, 14 sind axial zum Zentralkern 6 ausgerichtet und greifen L-förmig mit Abwinklungen 15, 16 ineinander (Fig. 2). Zwischen jeweils zwei Abwinklungen 15, 16 ist ein Freiraum 17 für einen Rastnocken 18 ausgespart. Von einem Paar ineinander greifender Hülsen 9, 10, 11, 12, 13, 14 ist jeweils die eine Hülse 10, 12, 14 als axial zum Zentralkern 6 bewegbare Zughülse 19 und die andere Hülse 9, 11, 13 als axial und tangential zum Zentralkern 6 bewegbare Dreh- und Zughülse 20 ausgestaltet.On an end 7 of a rigid, massive central core 6 is located in a central core 6 ummantelnder sleeve body. 8 The sleeve body 8 consists of several individual sleeves 9 , 10 , 11 , 12 , 13 , 14 . Two sleeves 9 , 10 ; 11 , 12 ; 13 , 14 are aligned axially to the central core 6 and engage in an L-shape with bends 15 , 16 ( FIG. 2). A space 17 for a locking cam 18 is left between two bends 15 , 16 . Of a pair of interlocking sleeves 9 , 10 , 11 , 12 , 13 , 14 , one sleeve 10 , 12 , 14 is a pulling sleeve 19 which can be moved axially to the central core 6 and the other sleeve 9 , 11 , 13 is an axial and tangential to the central core 6 movable rotating and pulling sleeve 20 designed.

Auf den geschlossenen Hülsenkörper 8 (Fig. 1, Fig. 2) wird zunächst Kunststoff 21 spritzgußtechnisch aufgebracht. Nach dem Erstarren des Kunststoffs 21 werden die Zughülsen 19 axial aus dem erzeugten Verschluß 2 herausgezogen. Dann werden die Dreh- und Zughülsen 20 derart gedreht, daß ihre Abwinklungen 15, 16 die Rastnocken 18 freigeben. Schließ­ lich werden die Dreh- und Zughülsen 20 axial aus dem Ver­ schluß 2 herausgezogen.Plastic 21 is first applied to the closed sleeve body 8 ( FIG. 1, FIG. 2) by injection molding. After the plastic 21 has solidified, the pulling sleeves 19 are pulled axially out of the closure 2 produced. Then the rotating and pulling sleeves 20 are rotated such that their bends 15 , 16 release the locking cams 18 . Finally, the rotating and pulling sleeves 20 are pulled axially out of the circuit 2 .

BezugszeichenlisteReference list

1 Vorrichtung
2 Verschluß
3 Kunststoff
4 ringförmiges Verschlußteil
5 Deckelteil
6 Zentralkern
7 Ende
8 Hülsenkörper
9, 10, 11, 12, 13, 14 Hülse
15, 16 Abwinklung
17 Freiraum
18 Rastnocken
19 Zughülse
20 Dreh- und Zughülse
21 Kunststoff 1 device
2 closure
3 plastic
4 ring-shaped closure part
5 cover part
6 central core
7 end
8 sleeve bodies
9 , 10 , 11 , 12 , 13 , 14 sleeve
15 , 16 bend
17 free space
18 locking cams
19 tension sleeve
20 rotating and pulling sleeves
21 plastic

Claims (3)

1. Vorrichtung zum Formen eines Verschlusses aus Kunst­ stoff, der aus einem ringförmigen Verschlußteil mit nach innen ausgerichteten Rastnocken und einem das ringförmige Verschlußteil abschließenden Deckelteil besteht, mit einem Zentralkern zur Aufnahme des Ver­ schlusses, dadurch gekennzeich­ net, daß der Zentralkern (6) an einem Ende (7) in radialer Richtung von einem Hülsenkörper (8) umgeben ist, und daß der Hülsenkörper (8) aus mehreren Hülsen (9, 10, 11, 12, 13, 14) gebildet ist, wobei jeweils zwei Hülsen (9, 10; 11, 12; 13, 14) axial zum Zentral­ kern (6) ausgerichtet sind und L-förmig mit Abwink­ lungen (15, 16) ineinander greifen und zwischen ihren Abwinklungen (15, 16) einen Freiraum (17) für einen Rastnocken (18) aussparen.1. A device for molding a closure made of plastic, which consists of an annular closure part with inwardly directed locking cams and a closing part closing the annular closure part, with a central core for receiving the closure, characterized in that the central core ( 6 ) one end ( 7 ) is surrounded in the radial direction by a sleeve body ( 8 ), and that the sleeve body ( 8 ) is formed from a plurality of sleeves ( 9 , 10 , 11 , 12 , 13 , 14 ), two sleeves ( 9 , 10 ; 11 , 12 ; 13 , 14 ) are aligned axially to the central core ( 6 ) and L-shaped with Abwink lungs ( 15 , 16 ) interlock and between their bends ( 15 , 16 ) a free space ( 17 ) for a locking cam Leave out ( 18 ). 2. Vorrichtung nach Anspruch 1, dadurch ge­ kennzeichnet, daß von jeweils zwei L-förmig ineinander greifenden Hülsen (9, 10, 11, 12, 13, 14) eine Hülse (10, 12, 14) als axial zum Zentralkern (6) bewegbare Zughülse (19) und eine Hülse (9, 11, 13) als axial und tangential zum Zentralkern (6) bewegbare Dreh- und Zughülse (20) ausgestaltet ist.2. Device according to claim 1, characterized in that of two L-shaped interlocking sleeves ( 9 , 10 , 11 , 12 , 13 , 14 ) a sleeve ( 10 , 12 , 14 ) as axially to the central core ( 6 ) Movable pull sleeve ( 19 ) and a sleeve ( 9 , 11 , 13 ) is designed as an axially and tangentially to the central core ( 6 ) movable rotating and pull sleeve ( 20 ). 3. Verfahren zum Betreiben der Vorrichtung des Anspruchs 2, dadurch gekennzeichnet, daß auf den geschlossenen Hülsenkörper (8) zum Formen eines Verschlusses zunächst Kunststoff (21) spritzgußtech­ nisch aufgebracht wird, daß nach dem Erstarren des Kunststoffs (21) die Zughülsen (19) axial aus dem er­ zeugten Verschluß (2) herausgezogen werden, daß dann die Dreh- und Zughülsen (20) derart gedreht werden, daß ihre Abwinklungen (15, 16) die Rastnocken (18) freige­ ben, und daß schließlich die Dreh- und Zughülsen (20) axial aus dem Verschluß (2) herausgezogen werden.3. A method of operating the device of claim 2, characterized in that plastic ( 21 ) is first injection molded onto the closed sleeve body ( 8 ) for forming a closure, that after the plastic ( 21 ) has solidified, the tension sleeves ( 19 ) axially from the closure he witnessed ( 2 ) are pulled out, that then the rotating and pulling sleeves ( 20 ) are rotated such that their bends ( 15 , 16 ) release the locking cams ( 18 ), and that finally the rotating and pulling sleeves ( 20 ) are pulled axially out of the closure ( 2 ).
DE1995138838 1995-10-19 1995-10-19 Plastic closure cap moulding tool for forming internal projections and operation of tool Withdrawn DE19538838A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1995138838 DE19538838A1 (en) 1995-10-19 1995-10-19 Plastic closure cap moulding tool for forming internal projections and operation of tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995138838 DE19538838A1 (en) 1995-10-19 1995-10-19 Plastic closure cap moulding tool for forming internal projections and operation of tool

Publications (1)

Publication Number Publication Date
DE19538838A1 true DE19538838A1 (en) 1997-04-24

Family

ID=7775195

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1995138838 Withdrawn DE19538838A1 (en) 1995-10-19 1995-10-19 Plastic closure cap moulding tool for forming internal projections and operation of tool

Country Status (1)

Country Link
DE (1) DE19538838A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0985508A2 (en) * 1998-07-29 2000-03-15 Polypipe Plc Mould and core for moulding undercut articles
EP1069980A1 (en) * 1998-03-27 2001-01-24 Comar, Inc. Apparatus for molding plastic caps

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069980A1 (en) * 1998-03-27 2001-01-24 Comar, Inc. Apparatus for molding plastic caps
EP1069980A4 (en) * 1998-03-27 2004-04-14 Comar Inc Apparatus for molding plastic caps
EP0985508A2 (en) * 1998-07-29 2000-03-15 Polypipe Plc Mould and core for moulding undercut articles
EP0985508A3 (en) * 1998-07-29 2001-05-09 John Upton Mould and core for moulding undercut articles

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