EP0622132A1 - Device for and method of moulding a special steel diaphragm for vacuum insulation elements - Google Patents

Device for and method of moulding a special steel diaphragm for vacuum insulation elements Download PDF

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Publication number
EP0622132A1
EP0622132A1 EP94100555A EP94100555A EP0622132A1 EP 0622132 A1 EP0622132 A1 EP 0622132A1 EP 94100555 A EP94100555 A EP 94100555A EP 94100555 A EP94100555 A EP 94100555A EP 0622132 A1 EP0622132 A1 EP 0622132A1
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EP
European Patent Office
Prior art keywords
cover plate
die
blank
rubber stamp
stainless steel
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EP94100555A
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German (de)
French (fr)
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EP0622132B1 (en
Inventor
Ingolf Doose
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Umformtechnik Stade GmbH
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Umformtechnik Stade GmbH
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    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/105—Stamping using yieldable or resilient pads of tubular products

Definitions

  • the invention relates to a device for deforming stainless steel membranes for vacuum heat insulation elements in a press, which has a base plate which receives a pressure and a cover plate which can be moved and exerts pressure in the direction thereof.
  • the invention further relates to a method for deforming stainless steel membranes for vacuum insulation elements.
  • Such heat insulation elements are described in detail in European Patent EP 0 263 928 B1.
  • These heat insulation elements are usually plate-shaped metallic vacuum sleeves, the front edge areas of which form undesirable thermal bridges between the base plate and cover plate. In order to minimize the losses caused by these thermal bridges, the wall thickness of the envelope is reduced in this area and the connection between the floor panel and the cover panel is lengthened, in which the front-side membranes are designed as circumferential bellows.
  • the stainless steel membranes are made of ring-welded stainless steel metal strips. Manufacturing technology, however, has proven to be extremely difficult to manufacture such bellows-like membranes with the required precision. In particular, the use of roll formers did not lead to the desired result, since the edge areas of the stainless steel membranes must also be smooth and homogeneous in order to be able to be connected to the plates of the heat insulation elements without defects.
  • the object of the present invention is therefore to provide a device of the type mentioned at the beginning for a method of the type mentioned at the beginning, with which stainless steel membranes can be produced simply, precisely and inexpensively.
  • This object is achieved in that a rubber stamp deflecting the pressing forces in transverse directions to the direction of movement of the pressing die is provided adjacent to a blank to be deformed.
  • the rubber stamp which, due to its elasticity, its volume consistency and its deformability, simultaneously deforms the blank welded from a stainless steel strip into an endless belt in its entire circumference, one does not need any complicated and mechanically complex pressing devices.
  • the rubber stamp is comparatively inexpensive to manufacture and can be reused many times. It is also possible to use differently shaped molds without changing the rubber stamp.
  • the device for deforming stainless steel membranes essentially consists of a pressing tool which has a base plate 1 which receives a pressing pressure and a cover plate 12 which can be moved and exerts pressing pressure in the direction thereof, and in which, on one side, a forming die 4 is adjacent to a blank 3 to be deformed and a rubber stamp 5 is provided on the opposite side of the blank 3.
  • the molding die 4 has a bellows-like surface 6 corresponding to a stainless steel membrane to be produced, onto which the blank 3 is pressed when it is deformed.
  • the rubber stamp 5 has a central pressing surface 7 which faces the blank 3 and which are adjacent to two flank surfaces 8, 9 which are bevelled against the pressing direction. These flank surfaces 8, 9 each have larger dimensions than the central pressing surface 7 of the rubber stamp 5.
  • the form die 4 is clamped in the directions of movement of the press die between a lower die support plate 10 and an upper die cover plate 11. Between the base plate 1 and the die support plate 10 and between the die cover plate 11 and the cover plate 12 acted upon by the ram 2, rubber springs 13, 14 extend over which the die support plate 10, the die cover plate 11 and the Forming die 4 arranged between them are held in their position during a pressing process when the cover plate 12 is pressed down in the direction of the base plate 1.
  • the base plate 1 and the cover plate 12 are each provided with mutually directed stamps, between which and a support surface 17, 18 of the rubber stamp 5, pressure-transmitting plates 19, 20 extend. These plates 19, 20 are made of a volume-constant elastic plastic, for example a Urelast plastic can be manufactured.
  • the boards 19, 20 are supported in horizontal directions on the die carrier plate 10, the die cover plate 11 and a support block 21 opposite these.
  • the rubber stamp 5 is also supported on the support block 21 on its rear surface 22 facing away from the blank 3.
  • a cavity 23 is formed, which is completely filled by the rubber stamp 5 and the stainless steel membrane 24 upon completion of a pressing process.
  • the blank 3 consists of a stainless steel sheet strip welded into an endless strip, which preferably has a thickness of 0.15 mm. This material thickness has proven to be sufficiently stable on the one hand and on the other hand can be deformed sufficiently precisely by using the rubber stamp 5.
  • the method according to the invention is carried out with the device according to the invention as follows:
  • the press ram 2 exerts compressive forces on the cover plate 12, as a result of which the cover plate 12 is moved in the direction of the base plate 1.
  • the punches 15, 16 are also moved towards one another and the rubber springs 13, 14 are pressed together, so that the die carrier plate 10 and the die cover plate 11 fix the die 4.
  • the compressive forces are introduced into the rubber stamp 5 Since this is supported on its back surface 22 facing away from the molding die 4 so that the rubber material of the rubber stamp 5 cannot evade in this direction, the central pressing surface 7 of the rubber stamp 5 in pushed the cavity 23 forward and presses the blank 3 onto the bellows-like surface 6 of the molding die 4 as the pressure is applied.
  • edge strips 25 of the blank 3 initially rest against the flank surfaces 8, 9 of the rubber stamp 5.
  • the rubber material of the rubber stamp 5 is pressed into the cavity 23 to such an extent that the edge strips 25 are pressed onto the side surfaces 26, 27 of the molding die 4 by the flank surfaces 8, 9 and the cavity 23 is completely covered by the rubber material of the rubber stamp 5 and the stainless steel membrane 24 then completed is filled.
  • the rubber stamp 5 releases the cavity 23 again so that it can be opened and the stainless steel membrane 24 can be removed

Abstract

Device for forming a special steel diaphragm for vacuum insulation elements in a press which has a bottom plate (1) that accepts a pressing pressure and a cover plate (12) which can be moved towards the said bottom plate and exerts pressing pressure, a rubber pad (5) which diverts the pressing forces in directions transverse to the direction of motion of the cover plate (12) being provided adjacent to a blank (3) to be formed. Method for forming special steel diaphragms in a press provided with a bottom plate (1) and a cover plate (12) which can be moved towards the said bottom plate and exerts pressing forces, the pressing forces exerted by the press ram (2) being diverted in directions transverse to the directions of motion of the press ram (2) by means of a rubber pad (5). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Verformung von Edelstahlmembranen für Vakuum-Wärmeisolations-Elemente in einer Presse, die eine einen Preßdruck aufnehmende Grundplatte und einen in Richtung auf diese verfahrbaren und Preßdruck ausübenden Deckplatte aufweist. Die Erfindung betrifft ferner ein Verfahren zur Verformung von Edelstahlmembranen für Vakuum-Isolations-Elemente. Derartige Wärmeisolations-Elemente sind ausführlich in der Europäischen Patentschrift EP 0 263 928 B 1 beschrieben. Diese Wärmeisolations-Elemente sind in der Regel plattenförmige metallische Vakuumhüllen, deren stirnseitige Randbereiche unerwünschte Wärmebrücken zwischen Bodenblech und Deckblech ausbilden. Um die durch diese Wärmebrücken erzeugten Verluste zu minimieren, reduziert man die Wanddicke der Hülle in diesem Bereich und verlängert die Verbindung zwischen Bodenblech und Deckblech, in der man stirnseitige Membranen als umlaufenden Faltenbalg ausführt.The invention relates to a device for deforming stainless steel membranes for vacuum heat insulation elements in a press, which has a base plate which receives a pressure and a cover plate which can be moved and exerts pressure in the direction thereof. The invention further relates to a method for deforming stainless steel membranes for vacuum insulation elements. Such heat insulation elements are described in detail in European Patent EP 0 263 928 B1. These heat insulation elements are usually plate-shaped metallic vacuum sleeves, the front edge areas of which form undesirable thermal bridges between the base plate and cover plate. In order to minimize the losses caused by these thermal bridges, the wall thickness of the envelope is reduced in this area and the connection between the floor panel and the cover panel is lengthened, in which the front-side membranes are designed as circumferential bellows.

Um das Vakuum an den Stirnseiten sicherzustellen, ist es erforderlich, daß die Edelstahlmembranen aus ringförmig verschweißten Edelstahl-Metallstreifen hergestellt werden. Fertigungstechnisch hat es sich allerdings als außerordentlich schwierig erwiesen, derartige faltenbalgartige Membranen mit der erforderlichen Präzision herzustellen. Insbesondere die Verwendung von Rollformern führte nicht zu dem gewünschten Ergebnis, da auch die Randbereiche der Edelstahlmembranen glatt und homogen ausgebildet sein müssen, um ohne Fehlstellen mit den Platten der Wärmeisolation-Elemente verbunden werden zu können.In order to ensure the vacuum on the end faces, it is necessary that the stainless steel membranes are made of ring-welded stainless steel metal strips. Manufacturing technology, however, has proven to be extremely difficult to manufacture such bellows-like membranes with the required precision. In particular, the use of roll formers did not lead to the desired result, since the edge areas of the stainless steel membranes must also be smooth and homogeneous in order to be able to be connected to the plates of the heat insulation elements without defects.

Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung der eingangs genannten Art für ein Verfahren der eingangs genannten Art zu schaffen, mit dem einfach, präzise und kostengünstig Edelstahlmembranen hergestellt werden können.The object of the present invention is therefore to provide a device of the type mentioned at the beginning for a method of the type mentioned at the beginning, with which stainless steel membranes can be produced simply, precisely and inexpensively.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß benachbart zu einem zu verformenden Rohling ein die Preßkräfte in Querrichtungen zur Bewegungsrichtung des Preßstempels umlenkender Gummistempel vorgesehen ist.This object is achieved in that a rubber stamp deflecting the pressing forces in transverse directions to the direction of movement of the pressing die is provided adjacent to a blank to be deformed.

Durch die Verwendung des Gummistempels, der aufgrund seiner Elastizität , seiner Volumenkonstanz und seiner Verformbarkeit den aus einem Edelstahlstreifen zu einem Endlosband verschweißten Rohling in seinem ganzen Umfang gleichzeitig verformt, kommt man ohne komplizierte und mechanisch aufwendige Preßvorrichtungen aus. Der Gummistempel ist vergleichsweise preiswert in der Herstellung und kann viele Male wieder verwendet werden. Es ist auch möglich, ohne Änderung des Gummistempels unterschiedlich geformte Formmatrizen zu verwenden.Through the use of the rubber stamp which, due to its elasticity, its volume consistency and its deformability, simultaneously deforms the blank welded from a stainless steel strip into an endless belt in its entire circumference, one does not need any complicated and mechanically complex pressing devices. The rubber stamp is comparatively inexpensive to manufacture and can be reused many times. It is also possible to use differently shaped molds without changing the rubber stamp.

Weitere Einzelheiten der vorliegenden Erfindung ergeben sich aus der nachfolgenden ausführlichen Beschreibung und den beigefügten Zeichnungen, in denen eine bevorzugte Ausführungsform der Erfindung beispielsweise veranschaulicht ist.Further details of the present invention will become apparent from the following detailed description and the accompanying drawings, in which a preferred embodiment of the invention is illustrated, for example.

In den Zeichnungen zeigen:

Figur 1:
eine schematische Darstellung eines Presswerkzeuges in teilweise geschnittener Seitenansicht;
Figur 2:
eine Draufsicht auf eine Formmatrize oberhalb eines Pressentisches;
Figur 3:
einen Querschnitt durch eine Formmatrize mit aufgeformter Membrane.
The drawings show:
Figure 1:
a schematic representation of a pressing tool in a partially sectioned side view;
Figure 2:
a plan view of a form die above a press table;
Figure 3:
a cross section through a form die with a molded membrane.

Die Vorrichtung zur Verformung von Edelstahlmembranen besteht im wesentlichen aus einem Presswerkzeug, die eine einen Preßdruck aufnehmende Grundplatte 1 und einen in Richtung auf diese verfahrbaren und Preßdruck ausübenden Deckplatte 12 aufweist und in der benachbart zu einem zu verformenden Rohling 3 auf seiner einen Seite eine Formmatrize 4 und auf der gegenüberliegenden Seite des Rohlings 3 ein Gummistempel 5 vorgesehen sind. Die Formmatrize 4 weist eine einer herzustellenden Edelstahlmembran entsprechende faltenbalgartige Oberfläche 6 auf, auf die der Rohling 3 bei seiner Verformung aufgepreßt wird. Der Gummistempel 5 weist eine zentrale Preßfläche 7 auf, die dem Rohling 3 zugekehrt ist und der jeweils zwei entgegen der Preßrichtung abgeschrägte Flankenflächen 8, 9 benachbart sind. Diese Flankenflächen 8, 9 weisen jeweils größere Abmessungen aus als die zentrale Preßfläche 7 des Gummistempels 5.The device for deforming stainless steel membranes essentially consists of a pressing tool which has a base plate 1 which receives a pressing pressure and a cover plate 12 which can be moved and exerts pressing pressure in the direction thereof, and in which, on one side, a forming die 4 is adjacent to a blank 3 to be deformed and a rubber stamp 5 is provided on the opposite side of the blank 3. The molding die 4 has a bellows-like surface 6 corresponding to a stainless steel membrane to be produced, onto which the blank 3 is pressed when it is deformed. The rubber stamp 5 has a central pressing surface 7 which faces the blank 3 and which are adjacent to two flank surfaces 8, 9 which are bevelled against the pressing direction. These flank surfaces 8, 9 each have larger dimensions than the central pressing surface 7 of the rubber stamp 5.

Die Formmatrize 4 ist in Bewegungsrichtungen des Preßstempels zwischen einer unteren Matrizenträgerplatte 10 und einer oberen Matrizenabdeckplatte 11 eingespannt. Zwischen der Grundplatte 1 und der Matrizenträgerplatte 10 sowie zwischen der Matrizenabdeckplatte 11 und der von dem Preßstempel 2 beaufschlagten Deckplatte 12 erstrecken sich Gummifedern 13, 14, über die die Matrizenträgerplatte 10, die Matrizenabdeckplatte 11 und die zwischen ihnen angeordnete Formmatrize 4 bei einem Preßvorgang, in ihrer Lage gehaltert werden, wenn die Deckplatte 12 in Richtung auf die Grundplatte 1 herabgedrückt wird. Die Grundplatte 1 und die Deckplatte 12 sind jeweils mit aufeinander gerichteten Stempeln versehen, zwischen denen und jeweils einer Auflagerfläche 17, 18 des Gummistempels 5 sich Preßkräfte übertragende Platinen 19, 20 erstrecken Diese Platinen 19, 20 sind aus einem volumenkonstanten elastischen Kunststoff, der beispielsweise ein Urelastkunststoff sein kann, gefertigt. Die Platinen 19, 20 sind in horizontalen Richtungen an der Matrizenträgerplatte 10, der Matrizenabdeckplatte 11 und einem diesen gegenüberliegenden Abstützblock 21 abgestützt. Auch der Gummistempel 5 ist an seiner dem Rohling 3 abgewandten Rückfläche 22 an dem Abstützblock 21 abgestützt. Zwischen dem Gummistempel 5 im Bereich der zentralen Preßfläche 7 und der Flankenflächen 8, 9 und der Oberfläche 6 der Formmatrize 4 ist ein Hohlraum 23 ausgebildet, der bei Beendigung eines Preßvorganges vollständig von dem Gummistempel 5 und der Edelstahlmembrane 24 ausgefüllt ist Der Rohling 3 besteht aus einem zu einem Endlosstreifen verschweißten Edelstahlblechstreifen, der vorzugsweise eine Stärke 0,15 mm aufweist. Diese Materialstärke hat sich als einerseits hinreichend stabil erwiesen und ist andererseits durch Einsatz des Gummistempels 5 ausreichend präzise verformbar.The form die 4 is clamped in the directions of movement of the press die between a lower die support plate 10 and an upper die cover plate 11. Between the base plate 1 and the die support plate 10 and between the die cover plate 11 and the cover plate 12 acted upon by the ram 2, rubber springs 13, 14 extend over which the die support plate 10, the die cover plate 11 and the Forming die 4 arranged between them are held in their position during a pressing process when the cover plate 12 is pressed down in the direction of the base plate 1. The base plate 1 and the cover plate 12 are each provided with mutually directed stamps, between which and a support surface 17, 18 of the rubber stamp 5, pressure-transmitting plates 19, 20 extend.These plates 19, 20 are made of a volume-constant elastic plastic, for example a Urelast plastic can be manufactured. The boards 19, 20 are supported in horizontal directions on the die carrier plate 10, the die cover plate 11 and a support block 21 opposite these. The rubber stamp 5 is also supported on the support block 21 on its rear surface 22 facing away from the blank 3. Between the rubber stamp 5 in the area of the central pressing surface 7 and the flank surfaces 8, 9 and the surface 6 of the molding die 4, a cavity 23 is formed, which is completely filled by the rubber stamp 5 and the stainless steel membrane 24 upon completion of a pressing process. The blank 3 consists of a stainless steel sheet strip welded into an endless strip, which preferably has a thickness of 0.15 mm. This material thickness has proven to be sufficiently stable on the one hand and on the other hand can be deformed sufficiently precisely by using the rubber stamp 5.

Das erfindungsgemäße Verfahren wird mit der erfindungsgemäßen Vorrichtung wie folgt durchgeführt:The method according to the invention is carried out with the device according to the invention as follows:

Nachdem zunächst der Rohling 3 in den Hohlraum 23 eingelegt und die Vorrichtung für ihren Einsatz zusammengesetzt ist, übt der Preßstempel 2 Druckkräfte auf die Deckplatte 12 aus, wodurch die Deckplatte 12 in Richtung auf die Grundplatte 1 bewegt wird. Dabei werden die Stempel 15, 16 ebenfalls aufeinander zubewegt und die Gummifedern 13, 14 zusammengepreßt, so daß die Matrizenträgerplatte 10 und die Matrizendeckplatte 11 die Formmatrize 4 festlegen. Über die Platinen 19, 20 werden die Druckkräfte in den Gummistempel 5 eingeleitet Da dieser auf seiner der Formmatrize 4 abgewandten Rückfläche 22 so abgestützt ist, daß das Gummimaterial des Gummistempels 5 in diese Richtung nicht ausweichen kann, wird die zentrale Preßfläche 7 des Gummistempels 5 in den Hohlraum 23 vorgeschoben und preßt bei fortschreitender Druckbeaufschlagung den Rohling 3 auf die faltenbalgartige Oberfläche 6 der Formmatrize 4. Die Randstreifen 25 des Rohlings 3 legen sich zunächst an die Flankenflächen 8, 9 des Gummistempels 5 an. Bei weiterer Druckbeaufschlagung wird jedoch das Gummimaterial des Gummistempels 5 soweit in den Hohlraum 23 hineingepreßt, daß die Randstreifen 25 von den Flankenflächen 8, 9 auf die Seitenflächen 26, 27 der Formmatrize 4 aufgepreßt werden und der Hohlraum 23 vollständig von dem Gummimaterial des Gummistempels 5 und der dann fertiggestellten Edelstahlmembrane 24 ausgefüllt ist. Nach Beendigung der Druckbeaufschlagung gibt der Gummistempel 5 den Hohlraum 23 wieder frei, so daß dieser geöffnet und die Edelstahlmembrane 24 entnommen werden kannAfter the blank 3 is first inserted into the cavity 23 and the device for its use is assembled, the press ram 2 exerts compressive forces on the cover plate 12, as a result of which the cover plate 12 is moved in the direction of the base plate 1. The punches 15, 16 are also moved towards one another and the rubber springs 13, 14 are pressed together, so that the die carrier plate 10 and the die cover plate 11 fix the die 4. About the boards 19, 20, the compressive forces are introduced into the rubber stamp 5 Since this is supported on its back surface 22 facing away from the molding die 4 so that the rubber material of the rubber stamp 5 cannot evade in this direction, the central pressing surface 7 of the rubber stamp 5 in pushed the cavity 23 forward and presses the blank 3 onto the bellows-like surface 6 of the molding die 4 as the pressure is applied. The edge strips 25 of the blank 3 initially rest against the flank surfaces 8, 9 of the rubber stamp 5. With further pressurization, however, the rubber material of the rubber stamp 5 is pressed into the cavity 23 to such an extent that the edge strips 25 are pressed onto the side surfaces 26, 27 of the molding die 4 by the flank surfaces 8, 9 and the cavity 23 is completely covered by the rubber material of the rubber stamp 5 and the stainless steel membrane 24 then completed is filled. After the pressurization has ended, the rubber stamp 5 releases the cavity 23 again so that it can be opened and the stainless steel membrane 24 can be removed

Claims (17)

Vorrichtung zur Verformung von Edelstahlmembranen für Vakuum-Wärmeisolations-Elemente in einer Presse, die eine einen Preßdruck aufnehmende Grundplatte (1) und einen in Richtung auf diese verfahrbaren und Preßdruck ausübenden Deckplatte (12) aufweist, dadurch gekennzeichnet, daß benachbart zu einem zu verformenden Rohling (3) ein die Preßkräfte in Querrichtungen zur Bewegungsrichtung der Deckplatte (12) umlenkender Gummistempel (5) vorgesehen ist.Device for deforming stainless steel membranes for vacuum heat insulation elements in a press, which has a base plate (1) which receives a pressure and a cover plate (12) which can be moved and exerts pressure in this direction, characterized in that adjacent to a blank to be deformed (3) a rubber stamp (5) is provided which deflects the pressing forces in transverse directions to the direction of movement of the cover plate (12). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Rohling (3) zwischen den Gummistempel (5) und einer eine Negativform ausbildenden Formmatrize (4) angeordnet ist.Device according to claim 1, characterized in that the blank (3) is arranged between the rubber stamp (5) and a molding die (4) forming a negative shape. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Formmatrize (4) eine einer herzustellenden Edelstahlmembrane entsprechende faltenbalgartige Oberfläche (6) aufweist, auf die der Rohling (3) nach bzw. während seiner Verformung aufgepreßt istDevice according to claims 1 and 2, characterized in that the molding die (4) has a bellows-like surface (6) corresponding to a stainless steel membrane to be manufactured, onto which the blank (3) is pressed after or during its deformation Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Gummistempel (5) eine zentrale, dem Rohling (3) zugekehrte Preßfläche (7) aufweist, der jeweils zwei entgegen der Preßrichtung abgeschrägte Flankenflächen (8, 9) benachbart sind.Device according to Claims 1 to 3, characterized in that the rubber stamp (5) has a central pressing surface (7) which faces the blank (3) and which is adjacent to two flank surfaces (8, 9) which are bevelled against the pressing direction. Vorrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Flankenflächen (8, 9) jeweils größere Abmessungen aufweisen als die zentrale Preßfläche (7).Device according to Claims 1 to 4, characterized in that the flank surfaces (8, 9) each have larger dimensions than the central pressing surface (7). Vorrichtung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Formmatrize (4) in Bewegungsrichtungen des Deckplatte (12) zwischen einer unteren Matrizenträgerplatte (10) und einer oberen Matrizenabdeckplatte (11) eingespannt ist.Apparatus according to claims 1 to 5, characterized in that the molding die (4) is clamped in the directions of movement of the cover plate (12) between a lower die support plate (10) and an upper die cover plate (11). Vorrichtung nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß sich zwischen der Grundplatte (1) und der Matrizenträgerplatte (10) sowie zwischen der Matritzenabdeckplatte (11) und der von dem Preßstempel (2) beaufschlagten Deckplatte (12) Gummifedern (13, 14) erstrecken, über die die Matrizenträgerplatte (10) und die Matrizenabdeckplatte (11) bei einem Preßvorgang in ihrer Lage gehaltert sind.Device according to Claims 1 to 6, characterized in that rubber springs (13, 14) are located between the base plate (1) and the die support plate (10) and between the die cover plate (11) and the cover plate (12) acted upon by the press ram (2). extend over which the die carrier plate (10) and the die cover plate (11) are held in position during a pressing operation. Vorrichtung nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die Grundplatte (1) und die Deckplatte (12) miteinander zugekehrten Stempeln (15, 16) versehen sind, zwischen denen und jeweils einer Auflagerfläche (17, 18) des Gummistempels (5) sich Preßkräfte übertragende Platinen (19, 20) befinden.Device according to Claims 1 to 7, characterized in that the base plate (1) and the cover plate (12) are provided with stamps (15, 16) which face one another, between which and a respective bearing surface (17, 18) of the rubber stamp (5) Blanks (19, 20) transmitting press forces are located. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Platinen (19, 20) aus einem volumenkonstanten elastischen Kunststoff, vorzugsweise Urelastkunststoff, bestehen.Apparatus according to claim 8, characterized in that the plates (19, 20) consist of a volume-constant elastic plastic, preferably primary elastic plastic. Vorrichtung nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß die Platinen (19, 20) in horizontalen Richtungen an der Matrizenträgerplatte (10), der Matrizenabdeckplatte (11) und einem diesen gegenüberliegenden Abstützblock (21) abgestützt sind.Apparatus according to claims 1 to 9, characterized in that the boards (19, 20) are supported in horizontal directions on the die carrier plate (10), the die cover plate (11) and a support block (21) opposite these. Vorrichtung nach Anspruch 1 bis 10, dadurch gekennzeichnet, daß der Gummistempel (5) an seiner dem Rohling (3) abgewandten Rückfläche (22) an dem Abstützblock (21) abgestützt ist.Device according to Claims 1 to 10, characterized in that the rubber stamp (5) is supported on the support block (21) on its rear surface (22) facing away from the blank (3). Vorrichtung nach Anspruch 1 bis 11, dadurch gekennzeichnet, daß zwischen dem Gummistempel (5) und der Oberfläche (6) der Formmatrize (4) ein Hohlraum (23) ausgebildet ist, der bei Beendigung eines Preßvorganges vollständig von dem Gummimaterial des Gummistempels (5) und der fertiggestellten Edelstahlmembrane (24) ausgefüllt ist.Device according to Claims 1 to 11, characterized in that a cavity (23) is formed between the rubber stamp (5) and the surface (6) of the molding die (4), which cavity is completely removed from the rubber material of the rubber stamp (5) when a pressing process is ended. and the finished stainless steel membrane (24) is filled. Vorrichtung nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß der Rohling (3)aus einem zu einem Endlosstreifen verschweißten Edelstahlblechstreifen bestehtDevice according to Claims 1 to 12, characterized in that the blank (3) consists of a stainless steel sheet strip welded to form an endless strip Vorrichtung nach Anspruch 1 bis 13, dadurch gekennzeichnet, daß der Edelstahlblechstreifen eine Stärke von etwa 0,10 mm aufweist.Device according to claims 1 to 13, characterized in that the stainless steel sheet strip has a thickness of approximately 0.10 mm. Verfahren zur Verformung von Edelstahlmembranen in einer mit einer Grundplatte (1) und einem in Richtung auf diese verfahrbaren und Preßkräfte ausübenden Deckplatte (12) versehenen Presse, dadurch gekennzeichnet, daß die von dem Preßstempel (2) ausgeübten Preßkräfte über einen Gummistempel (5) in Querrichtungen zu den Bewegungsrichtungen des Preßstempels (2) umgelenkt werden.Process for deforming stainless steel membranes in a press provided with a base plate (1) and a cover plate (12) which can be moved and exerts pressing forces in the direction thereof, characterized in that the pressing forces exerted by the press ram (2) via a rubber ram (5) in Transverse directions to the directions of movement of the ram (2) are deflected. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die umgelenkten Druckkräfte zunächst von der zentralen Preßfläche (7) des Gummistempels (5) in den Rohling (3) eingeleitet und dieser in die faltenbalgartigen Vertiefungen der Oberfläche (6) der Formmatrize (4) hineingepreßt wird.A method according to claim 15, characterized in that the deflected pressure forces are first introduced from the central pressing surface (7) of the rubber stamp (5) into the blank (3) and this is pressed into the bellows-like depressions of the surface (6) of the molding die (4) . Verfahren nach Anspruch 15 und 16, dadurch gekennzeichnet, daß die von der zentralen Preßfläche (7) des Gummistempels (5) nicht beaufschlagten Randstreifen (25) des Rohlings (3) zunächst in Richtung auf die Flankenflächen (8, 9) des Gummistempels (5) verformt und dann bei weiterer Druckbeaufschlagung von diesen um Außenflächen (26, 27) der Formmatrize (4) herumgelegt werden.Method according to Claims 15 and 16, characterized in that the edge strips (25) of the blank (3) not acted upon by the central pressing surface (7) of the rubber stamp (5) initially in the direction of the flank surfaces (8, 9) of the rubber stamp (5 ) deformed and then, when subjected to further pressure, can be placed around the outer surfaces (26, 27) of the molding die (4).
EP94100555A 1993-03-25 1994-01-15 Device for and method of moulding a special steel diaphragm for vacuum insulation elements Expired - Lifetime EP0622132B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4309678 1993-03-25
DE4309678A DE4309678A1 (en) 1993-03-25 1993-03-25 Device and method for deforming stainless steel membranes for vacuum thermal insulation elements

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EP0622132A1 true EP0622132A1 (en) 1994-11-02
EP0622132B1 EP0622132B1 (en) 1998-03-18

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DE (2) DE4309678A1 (en)

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US5901593A (en) * 1998-01-26 1999-05-11 Northrop Grumman Corporation Making hydropress formblocks and dies utilizing stereolithography and liquid molding compounds
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US6865917B2 (en) * 2003-03-27 2005-03-15 Ford Motor Company Flanging and hemming process with radial compression of the blank stretched surface
JP2005118828A (en) * 2003-10-17 2005-05-12 Nakamura Mfg Co Ltd Method for forming projecting shaft in electronic storage device
US9352373B2 (en) 2007-06-01 2016-05-31 The University Of Queensland Assembly and method for press forming a deformable material
US8062012B2 (en) * 2007-06-05 2011-11-22 Metaldyne, Llc Elastomeric seal sizer
US8683836B2 (en) * 2011-07-29 2014-04-01 Ford Global Technologies, Llc Method and apparatus for forming sharp styling lines on metal panels
JP6021050B2 (en) * 2012-04-27 2016-11-02 内山工業株式会社 Cover manufacturing method and press die used therefor
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US5490407A (en) 1996-02-13
EP0622132B1 (en) 1998-03-18
DE4309678A1 (en) 1994-09-29
DE59405447D1 (en) 1998-04-23

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