EP0830906A1 - Closure device for an expansion molding apparatus - Google Patents

Closure device for an expansion molding apparatus Download PDF

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Publication number
EP0830906A1
EP0830906A1 EP97116288A EP97116288A EP0830906A1 EP 0830906 A1 EP0830906 A1 EP 0830906A1 EP 97116288 A EP97116288 A EP 97116288A EP 97116288 A EP97116288 A EP 97116288A EP 0830906 A1 EP0830906 A1 EP 0830906A1
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EP
European Patent Office
Prior art keywords
hollow body
guide rods
recesses
interior
locking device
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Withdrawn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
EP97116288A
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German (de)
French (fr)
Inventor
Pim Van Dam
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca 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 Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Publication of EP0830906A1 publication Critical patent/EP0830906A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/08—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by explosives, e.g. chemical explosives

Definitions

  • the present invention is in the field of deformation of hollow bodies such as cans or pipes due to erratic Pressure increase inside the hollow body ("expansion forms").
  • the hollow body to be deformed must be in one Tool to be inserted, which in its clear dimension has the desired changed dimensions.
  • the upper Opening of the hollow body must seal against the environment be closed, the closure being the necessary Equipment for gas supply and ignition of the gas mixture wearing.
  • the one already mentioned above WO95 / 08410 provided that the parts of the hollow body enclosing form via a bayonet lock with which the Closure plate supporting part of the device are connected.
  • the part of the device carrying the closure plate is included rigidly arranged, while the shape enclosing the hollow body is slidably arranged.
  • the object of the present invention is therefore a To provide a locking device that operates faster can and not with regard to the demolding options is limited and it also allows one to choose an arrangement in which the shape enclosing the hollow body itself in the Entire device is arranged immovably (but of course the individual parts of the form apart if necessary can be moved).
  • the during the molding process on the closure of the The pressure exerted by the hollow body is reduced using the transfer the device according to the invention to a locking device, which are not necessarily related to the form itself stands, but usually attached to the same base plate or the like is like this.
  • the shape itself can be fixed; at the The closure can be opened with the guide rods released from the locks from the opening the hollow body are moved away, so that the removal of the finished hollow body with a displacement of the mold components must be connected in the axial direction.
  • the guide rods are preferably square, e.g. in the Cross-section square or rectangular.
  • a device according to the invention is shown schematically in FIG Cut shown.
  • a wall has a hollow body 1 in a shape 2.
  • the neck 3 of the hollow body is through closed a stopper 4.
  • About a guide rod 5 is the force dissipated, the guide rod not being mandatory, but preferably angular, in the figure rectangular is.
  • the guide rod is in the locked position of the Stopper 4 held by means of a locking device 6, the is not directly related to Form 2.
  • FIG 2 shows the locking device 6 of Figure 1 with the locked guide rod 5 in detail: the guide rod is through a corresponding cavity of a holder 7 of Locking device 6 out (dashed inside drawn).
  • the lower end 5 'protrudes which carries a recess 8 on both sides (the one Page is also drawn in dashed lines), from the opening of the Fastening device out.
  • the shape of the wedges allows the Guide rods in the closed position of the plug Insert the wedge into the recesses.
  • the angle at which the Wedge surfaces from those that are otherwise perpendicular to each other In principle, areas deviate (beveled) are free selectable; it should not be too big to be sufficient Ensure the wedge's clamping force and not be too small to enable high accuracy.
  • A is preferred Range from 2.5 to 3.5 degrees, especially from about 3 degrees; how indicated in Figure 2.
  • the number of guide rods is not according to the invention fixed, preferably 4, very particularly preferably 2 Guide rods and locking devices provided.

Abstract

The device comprises a plug (4) with at least one gas feed line, and maybe an igniter unit, for sealing the inner cavity of the hollow body. The plug is connected to at least two guide rods (5) which have recesses (8) in the vicinity of their outer end, and a locking component with wedge-form elements (9) engaging in the recesses. Each wedge-form element has a 2-5 degree face inclination (10) which can interact with similar flat lateral faces in the recesses in the guide rods.

Description

Die vorliegende Erfindung liegt auf dem Gebiet der Verformung von Hohlkörpern wie Dosen oder Rohren durch sprunghaften Druckanstieg im Inneren des Hohlkörpers ("Expansionsformen").The present invention is in the field of deformation of hollow bodies such as cans or pipes due to erratic Pressure increase inside the hollow body ("expansion forms").

Es ist bekannt, zylindrische Dosenkörper oder dergleichen durch sog. Explosionsformen oder Expansionsformen in eine zylindrische oder mit Wölbungen versehene Form zu überführen. Dabei kann der sprunghafte Druckanstieg, der im Inneren des zu verformenden Hohlkörpers aufgebracht werden muß, entweder direkt an Ort und Stelle durch Zünden eines explosiven Gemisches erzeugt werden (siehe beispielsweise WO95/08410). Alternativ kann z.B. eine Explosion in einer getrennten Kammer erfolgen, wobei Ventile vorgesehen sind, die auf den plötzlichen Druckanstieg in der getrennten Kammer reagieren und daraufhin Öffnungen zum Innenraum des zu verformenden Hohlkörpers freigeben (siehe beispielsweise Patentveröffentlichung FR 2 206 988 oder Patentbeschreibung GB 1 532 812).It is known to pass through cylindrical can bodies or the like So-called explosion forms or expansion forms in a cylindrical or to transfer the shape provided with arches. The abrupt increase in pressure inside the to be deformed Hollow body must be applied, either directly on site and Point by igniting an explosive mixture (see for example WO95 / 08410). Alternatively, e.g. a Explosion take place in a separate chamber, with valves are provided, which are due to the sudden rise in pressure in the separate chamber react and then openings to Release the interior of the hollow body to be deformed (see for example patent publication FR 2 206 988 or Patent description GB 1 532 812).

Für dieses Verfahren muß der zu verformende Hohlkörper in ein Werkzeug eingelegt werden, welches in seiner lichten Ausdehnung die gewünschten veränderten Abmessungen aufweist. Die obere Öffnung des Hohlkörpers muß dichtend gegenüber der Umgebung verschlossen sein, wobei der Verschluß die notwendigen Einrichtungen für die Gaszufuhr und die Zündung des Gasgemisches trägt. Dabei ist gemäß dem Vorschlag der bereits oben erwähnten WO95/08410 vorgesehen, daß die Teile der den Hohlkörper umschließenden Form über einen Bajonettverschluß mit dem die Verschlußplatte tragenden Teil der Vorrichtung verbunden sind. Der die Verschlußplatte tragende Teil der Vorrichtung ist dabei starr angeordnet, während die den Hohlkörper umschließende Form verschieblich angeordnet ist.For this process, the hollow body to be deformed must be in one Tool to be inserted, which in its clear dimension has the desired changed dimensions. The upper Opening of the hollow body must seal against the environment be closed, the closure being the necessary Equipment for gas supply and ignition of the gas mixture wearing. According to the proposal, the one already mentioned above WO95 / 08410 provided that the parts of the hollow body enclosing form via a bayonet lock with which the Closure plate supporting part of the device are connected. The part of the device carrying the closure plate is included rigidly arranged, while the shape enclosing the hollow body is slidably arranged.

Die Entformung des Hohlkörpers nach der Expansion kann dabei erst erfolgen, wenn die den Hohlkörper umschließende Form axial in der Richtung ihres Bodens weg bewegt wurde. Das Öffnen und Schließen eines derartigen Bajonettverschlusses erfordert daher relativ viel Zeit. Es ist jedoch erwünscht, innerhalb des Gesamtverfahrens Zeit einzusparen bzw. die Entformung leicht durch Wegbewegen des Verschließteiles vornehmen zu können.The removal of the hollow body after expansion can only take place when the shape surrounding the hollow body is axial was moved away in the direction of their bottom. The opening and Closing such a bayonet lock therefore requires relatively much time. However, it is desirable to be within the Overall process to save time or demoulding easily to be able to carry out by moving the closing part.

Aufgabe der vorliegenden Erfindung ist es daher, eine Verschlußvorrichtung bereitzustellen, die schneller betätigt werden kann und die bezüglich der Entformungsmöglichkeiten nicht beschränkt ist und es auch erlaubt, eine Anordnung zu wählen, in welcher die den Hohlkörper umschließende Form selbst in der Gesamtvorrichtung unverschieblich angeordnet ist (wobei aber selbstverständlich die einzelnen Teile der Form ggf. auseinander bewegt werden können).The object of the present invention is therefore a To provide a locking device that operates faster can and not with regard to the demolding options is limited and it also allows one to choose an arrangement in which the shape enclosing the hollow body itself in the Entire device is arranged immovably (but of course the individual parts of the form apart if necessary can be moved).

Die vorgenannte Aufgabe wird durch die Bereitstellung einer Vorrichtung gemäß Anspruch 1 gelöst.The above task is accomplished by providing a Device according to claim 1 solved.

Der während des Formungsvorganges auf den Verschluß der Hohlkörper-Öffnung ausgeübte Druck wird mit Hilfe der erfindungsgemäßen Vorrichtung auf eine Arretierung übertragen, die nicht notwendigerweise mit der Form selbst in Verbindung steht, aber meist an derselben Grundplatte oder dgl. befestigt ist wie diese. Die Form selbst kann fest montiert sein; beim Öffnen nach erfolgtem Formungsvorgang kann der Verschluß mit den aus den Arretierungen gelösten Führungsstangen aus der Öffnung des Hohlkörpers wegbewegt werden, so daß die Entformung des fertigen Hohlkörpers nicht mit einer Verschiebung der Form-Bestandteile in axialer Richtung verbunden sein muß.The during the molding process on the closure of the The pressure exerted by the hollow body is reduced using the transfer the device according to the invention to a locking device, which are not necessarily related to the form itself stands, but usually attached to the same base plate or the like is like this. The shape itself can be fixed; at the The closure can be opened with the guide rods released from the locks from the opening the hollow body are moved away, so that the removal of the finished hollow body with a displacement of the mold components must be connected in the axial direction.

Die Führungsstangen sind bevorzugt vierkantig, z.B. im Querschnitt quadratisch oder rechteckig.The guide rods are preferably square, e.g. in the Cross-section square or rectangular.

Im einzelnen soll die erfindungsgemäße Vorrichtung nun anhand der Figuren 1 und 2 näher erläutert werden.In detail, the device according to the invention is now to be described of Figures 1 and 2 are explained in more detail.

In Figur 1 ist schematisch eine erfindungsgemäße Vorrichtung im Schnitt gezeigt. Ein Hohlkörper liegt mit seiner Wandung 1 in einer Form 2. Der eingezogene Hals 3 des Hohlkörpers ist durch einen Stopfen 4 verschlossen. Über eine Führungsstange 5 wird die Kraft abgeführt, wobei die Führungsstange nicht zwingend, aber bevorzugt winklig, in der Figur rechtwinklig ausgestaltet ist. Die Führungsstange wird in der Verschluß-Position des Stopfens 4 mit Hilfe einer Arretiereinrichtung 6 gehalten, die mit der Form 2 nicht direkt in Verbindung steht.A device according to the invention is shown schematically in FIG Cut shown. A wall has a hollow body 1 in a shape 2. The neck 3 of the hollow body is through closed a stopper 4. About a guide rod 5 is the force dissipated, the guide rod not being mandatory, but preferably angular, in the figure rectangular is. The guide rod is in the locked position of the Stopper 4 held by means of a locking device 6, the is not directly related to Form 2.

Figur 2 zeigt die Arretierungsvorrichtung 6 der Figur 1 mit der arretierten Führungsstange 5 im einzelnen: Die Führungsstange wird durch einen entsprechenden Hohlraum eines Halters 7 der Arretiereinrichtung 6 geführt (im Inneren gestrichelt gezeichnet). In arretierter Stellung ragt das untere Ende 5', welches beidseitig jeweils eine Ausnehmung 8 trägt (die eine Seite ist ebenfalls gestrichelt gezeichnet), aus der Öffnung der Befestigungsvorrichtung heraus. Als Feststeller dienen zwei Keile 9,9', die zum Arretieren der Führungsstangen in deren Ausnehmungen 8 eingeschoben werden und mit ihren geneigten Flächen 10,10' mit den jeweiligen Gegenflächen der Ausnehmungen 8 der Führungsstangen 5 zusammenwirken.Figure 2 shows the locking device 6 of Figure 1 with the locked guide rod 5 in detail: the guide rod is through a corresponding cavity of a holder 7 of Locking device 6 out (dashed inside drawn). In the locked position, the lower end 5 'protrudes, which carries a recess 8 on both sides (the one Page is also drawn in dashed lines), from the opening of the Fastening device out. Two serve as locking devices Wedges 9.9 'used to lock the guide rods in their Recesses 8 are inserted and with their inclined Surfaces 10,10 'with the respective counter surfaces of the Recesses 8 of the guide rods 5 cooperate.

Die Form der Keile ermöglicht eine Arretierung der Führungsstangen in der Geschlossen-Stellung des Stopfens durch Einführung des Keils in die Ausnehmungen. Der Winkel, in dem die Keil-Flächen von den ansonsten rechtwinklig zueinanderstehenden Flächen abweichen (abgeschrägt sind), ist im Prinzip frei wählbar; er sollte nicht zu groß sein, um eine ausreichende Schließkraft der Keile sicherzustellen, und nicht zu klein sein, um eine hohe Genauigkeit zu ermöglichen. Bevorzugt ist ein Bereich von 2,5 bis 3,5 Grad, insbesondere von etwa 3 Grad; wie in Figur 2 angegeben.The shape of the wedges allows the Guide rods in the closed position of the plug Insert the wedge into the recesses. The angle at which the Wedge surfaces from those that are otherwise perpendicular to each other In principle, areas deviate (beveled) are free selectable; it should not be too big to be sufficient Ensure the wedge's clamping force and not be too small to enable high accuracy. A is preferred Range from 2.5 to 3.5 degrees, especially from about 3 degrees; how indicated in Figure 2.

Die Anzahl der Führungsstangen ist erfindungsgemäß nicht festgelegt, bevorzugt sind 4, ganz besonders bevorzugt 2 Führungsstangen und Arretiervorrichtungen vorgesehen.The number of guide rods is not according to the invention fixed, preferably 4, very particularly preferably 2 Guide rods and locking devices provided.

Claims (6)

Verschlußvorrichtung für eine Einrichtung zum Formen von Hohlkörpern durch Verformen der Seitenwände und/oder des Bodens mittels sprunghaften Druckanstieges im Innenraum des Hohlkörpers, umfassend einen mit mindestens einer Gaszuführungsleitung und ggf. einer Zündeinrichtung versehenen Stopfen (4) zum dichtenden Verschließen des Innenraums des Hohlkörpers, der mit mindestens zwei Führungsstangen (5) verbunden ist, die in der Nähe ihres äußeren Endes Ausnehmungen (8) aufweisen, sowie eine Arretiervorrichtung mit keilförmigen Mitteln (9), die in die Ausnehmungen (8) eingreifen können.Closure device for a device for molding Hollow bodies by deforming the side walls and / or the Floor by means of sudden pressure increases in the interior of the Hollow body, comprising one with at least one Gas supply line and possibly an ignition device provided plug (4) for sealing the Interior of the hollow body with at least two Guide rods (5) is connected in the vicinity of their have outer end recesses (8), and a Locking device with wedge-shaped means (9) which in the Can engage recesses (8). Vorrichtung nach Anspruch 1, worin die keilförmigen Mittel der Arretiervorrichtung jeweils eine um 2 bis 5 Grad geneigte Fläche (10) aufweisen, die mit eben solchen Seitenflächen der Ausnehmungen in den Führungsstangen zusammenwirken kann.The device of claim 1, wherein the wedge-shaped means the locking device each by 2 to 5 degrees have inclined surface (10) with just such Side surfaces of the recesses in the guide rods can work together. Vorrichtung nach Anspruch 2, worin die geneigten Flächen (10) eine Neigung von etwa drei Grad aufweisen.The device of claim 2, wherein the inclined Surfaces (10) have an inclination of approximately three degrees. Vorrichtung nach einem der Ansprüche 1 bis 3, worin die Führungsstangen (5) einen quadratischen oder rechteckigen Querschnitt aufweisen.Device according to one of claims 1 to 3, wherein the Guide rods (5) a square or rectangular Have cross-section. Verschlußvorrichtung für eine Einrichtung zum Formen von Hohlkörpern durch Verformen der Seitenwände und/oder des Bodens mittels sprunghaften Druckanstieges im Innenraum des Hohlkörpers, umfassend eine Form (2) zur Aufnahme des Hohlkörpers, einen mit mindestens einer Gaszuführungsleitung und ggf. einer Zündeinrichtung versehenen Stopfen (4) zum dichtenden Verschließen des Innenraums des Hohlkörpers sowie eine Arretiervorrichtung (6), wobei der Stopfen Mittel zu einer Arretierung während des dichtenden Verschließens trägt, die mit der Arretiervorrichtung, die nicht mit der Form in Verbindung steht, in arretierenden Eingriff gebracht werden können.Closure device for a device for molding Hollow bodies by deforming the side walls and / or the Floor by means of sudden pressure increases in the interior of the Hollow body, comprising a shape (2) for receiving the Hollow body, one with at least one gas supply line and, if necessary, an ignition device provided with a plug (4) for sealing the interior of the hollow body as well a locking device (6), wherein the stopper means a lock during sealing carries with the locking device, not with the Form communicates, brought into locking engagement can be. Vorrichtung nach Anspruch 5, worin die Arretiervorrichtung (6) an einer Grundplatte der Einrichtung zum Formen von Hohlkörpern befestigt ist.The apparatus of claim 5, wherein the Locking device (6) on a base plate of the device is attached to form hollow bodies.
EP97116288A 1996-09-20 1997-09-18 Closure device for an expansion molding apparatus Withdrawn EP0830906A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996138678 DE19638678A1 (en) 1996-09-20 1996-09-20 Closure device for a device for expansion molding
DE19638678 1996-09-20

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008064746A1 (en) * 2006-12-01 2008-06-05 Cosma Engineering Europe Ag Closure device for explosion forming
US8047036B2 (en) 2005-06-03 2011-11-01 Magna International Inc. Device and method for explosion forming
US8252210B2 (en) 2006-08-11 2012-08-28 Cosma Engineering Europe Ag Method and device for explosion forming
US8322175B2 (en) 2006-12-20 2012-12-04 Cosma Engineering Europe Ag Workpiece and method for explosion forming
US8650921B2 (en) 2006-08-11 2014-02-18 Cosma Engineering Europe Ag Method and device for explosion forming
US8713982B2 (en) 2008-01-31 2014-05-06 Magna International Inc. Device for explosive forming
US8875553B2 (en) 2007-02-14 2014-11-04 Cosma Engineering Europe Ag Method and mould arrangement for explosion forming
US8939743B2 (en) 2007-08-02 2015-01-27 Cosma Engineering Europe Ag Device for supplying a fluid for explosion forming
US9393606B2 (en) 2007-05-22 2016-07-19 Cosma Engineering Europe Ag Ignition device for explosive forming

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252312A (en) * 1962-04-25 1966-05-24 Continental Can Co Method and apparatus for explosive reshaping of hollow ductile objects
GB1109147A (en) * 1964-09-21 1968-04-10 Gen Dynamics Corp Improvements in or relating to electrohydraulic forming apparatus
US3641796A (en) * 1968-09-25 1972-02-15 Heinrich Hertel Apparatus for shock-forming of workpieces
WO1995008410A2 (en) * 1993-09-21 1995-03-30 Carnaudmetalbox Plc Improvements in and relating to the shaping of articles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485075A (en) * 1967-10-18 1969-12-23 Vasily Vasilievich Kiselev High energy forming vacuum chamber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3252312A (en) * 1962-04-25 1966-05-24 Continental Can Co Method and apparatus for explosive reshaping of hollow ductile objects
GB1109147A (en) * 1964-09-21 1968-04-10 Gen Dynamics Corp Improvements in or relating to electrohydraulic forming apparatus
US3641796A (en) * 1968-09-25 1972-02-15 Heinrich Hertel Apparatus for shock-forming of workpieces
WO1995008410A2 (en) * 1993-09-21 1995-03-30 Carnaudmetalbox Plc Improvements in and relating to the shaping of articles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8047036B2 (en) 2005-06-03 2011-11-01 Magna International Inc. Device and method for explosion forming
US8252210B2 (en) 2006-08-11 2012-08-28 Cosma Engineering Europe Ag Method and device for explosion forming
US8650921B2 (en) 2006-08-11 2014-02-18 Cosma Engineering Europe Ag Method and device for explosion forming
WO2008064746A1 (en) * 2006-12-01 2008-06-05 Cosma Engineering Europe Ag Closure device for explosion forming
US8250892B2 (en) 2006-12-01 2012-08-28 Cosma Engineering Europe Ag Closure device for explosion forming
US8322175B2 (en) 2006-12-20 2012-12-04 Cosma Engineering Europe Ag Workpiece and method for explosion forming
US8875553B2 (en) 2007-02-14 2014-11-04 Cosma Engineering Europe Ag Method and mould arrangement for explosion forming
US9393606B2 (en) 2007-05-22 2016-07-19 Cosma Engineering Europe Ag Ignition device for explosive forming
US8939743B2 (en) 2007-08-02 2015-01-27 Cosma Engineering Europe Ag Device for supplying a fluid for explosion forming
US8713982B2 (en) 2008-01-31 2014-05-06 Magna International Inc. Device for explosive forming

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