DE502468C - Press form for celluloid, artificial horn, etc. like - Google Patents

Press form for celluloid, artificial horn, etc. like

Info

Publication number
DE502468C
DE502468C DES92490D DES0092490D DE502468C DE 502468 C DE502468 C DE 502468C DE S92490 D DES92490 D DE S92490D DE S0092490 D DES0092490 D DE S0092490D DE 502468 C DE502468 C DE 502468C
Authority
DE
Germany
Prior art keywords
celluloid
pressed
mold
press form
artificial horn
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.)
Expired
Application number
DES92490D
Other languages
German (de)
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.)
Siempelkamp Giesserei KG
Original Assignee
Siempelkamp Giesserei KG
Publication date
Priority to DES92490D priority Critical patent/DE502468C/en
Application granted granted Critical
Publication of DE502468C publication Critical patent/DE502468C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor

Description

Preßform für Cellulold, Kunsthorn u. dgl. Die Erfindung betrifft eine Preßforrn, in welcher plastische Massen, wie Celluloid, Kunsthorn u. dgl., durch einen eintretenden Druckstempel unter Druck und Hitze verarbeitet werden sollen. Bei den bisher üblichen Ausführungen besteht die Schwierigkeit, eine genügende Abdichtung zwischen dem Preßstempel und der Preßform herzustellen, welche ein Austreten des unter der Hitze erweichten Preßgutes verhindert. Es ist dieses besonders der Fall, wenn der durch den Preßstempel ausgeübte Druck auf das Preßgut sehr hoch ist. Die Erfindung besteht darin, daß zwischen dem Preßstempel und dem Preßgut bzw. der das Preßgut tragenden Tragplatte eine in die Preßform eingepaßte Platte eingelegt ist, welche aus einem Werkstoff hergestellt ist, der einen größeren Ausdehnungskoeffizienten hat als der Werkstoff der Preßform. Wenn beispielsweise die Preßform aus Stahl hergestellt ist, kann die Zwischenplatte aus Messing, Aluminium, Kupfer oder einem anderen Werkstoff hergestellt sein, der einen größeren Ausdehnungskoeffizienten hat als Stahl. Mit zunehmender Erhitzung erweicht sich das Preßgut, in gleicher Weise aber dehnt sich die Zwischenplatte aus und legt sich fest gegen die Innenwandung der Preßform. Hierbei wird eine vollständige Abdichtung erreicht und ein Austreten des Preßgutes nach außen verhindert.Die for cellulold, artificial horn and the like Press form in which plastic materials such as celluloid, artificial horn and the like pass through an entering pressure stamp is to be processed under pressure and heat. With the designs that have been customary up to now, there is a difficulty in achieving a sufficient seal to produce between the ram and the mold, which prevents leakage of the Prevents pressed material softened under the heat. This is particularly the case when the pressure exerted by the ram on the material to be pressed is very high. the Invention is that between the ram and the material to be pressed or the A support plate carrying the material to be pressed is inserted into the mold, which is made of a material that has a greater coefficient of expansion has as the material of the mold. For example, if the die is made of steel the intermediate plate can be made of brass, aluminum, copper or another material be made, which has a greater coefficient of expansion than steel. With As the temperature increases, the material to be pressed softens, but expands in the same way the intermediate plate and lays itself firmly against the inner wall of the mold. Here a complete seal is achieved and leakage of the pressed material after outside prevented.

In der Abbildung ist ein Ausführungsbeispiel bei einer von unten wirkenden hvdraulischen Presse dargestellt, bei welcher der Preßstempel c von unten her in die Preßform a eintritt; ebensogut kann auch eine Preßform gewählt werden, bei welcher der Preßstempel von oben her eintritt. Die Form enthält das Preßgut b auf einer Tragplatte d, zwischen dieser und dem Preßstempel c befindet sich die Abdichtungsplatte f.In the figure, an embodiment of a hydraulic press acting from below is shown, in which the ram c enters the mold a from below; A mold in which the ram enters from above can just as well be selected. The mold contains the material to be pressed b on a support plate d, between this and the ram c is the sealing plate f.

Claims (1)

PATENTANSPRUCFI: Preßform für Celluloid, Kunsthorn u. dgl., dadurch gekennzeichnet, daß zwischen dem Preßstempel und dem Preßgut bzw. der das Preßgut tragenden Tragplatte eine in die PreLiform passende Platte zwischengelegt ist, welche aus einem Werkstoff besteht, der einen größerenAusdehnungskoeffizienten hat als der Werkstoff der Preßform.PATENT CLAIM: Press mold for celluloid, artificial horn and the like, thereby characterized in that between the ram and the material to be pressed or the material to be pressed A plate that fits into the PreLiform is placed between the supporting plate, which consists of a material that has a greater coefficient of expansion than the material of the mold.
DES92490D Press form for celluloid, artificial horn, etc. like Expired DE502468C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES92490D DE502468C (en) Press form for celluloid, artificial horn, etc. like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES92490D DE502468C (en) Press form for celluloid, artificial horn, etc. like

Publications (1)

Publication Number Publication Date
DE502468C true DE502468C (en) 1930-07-19

Family

ID=7517254

Family Applications (1)

Application Number Title Priority Date Filing Date
DES92490D Expired DE502468C (en) Press form for celluloid, artificial horn, etc. like

Country Status (1)

Country Link
DE (1) DE502468C (en)

Similar Documents

Publication Publication Date Title
DE1285264B (en) Ring seal for hydraulic stamp or the like.
DE502468C (en) Press form for celluloid, artificial horn, etc. like
DE331989C (en) Composable gear
DE711907C (en) Device for pressing hollow bodies closed at one end
DE2459661B2 (en) FLANGE CONNECTION FOR PIPES MADE OF CERAMIC MATERIAL
DE616115C (en) Method for fastening head ends on metal pipes
DE653626C (en) Pack with sealing sleeve for pistons, stuffing boxes or the like, which has a wire mesh insert
DE2420483C2 (en) Seal for moving parts, in particular parts of distribution valves
DE638053C (en) Press ram for the production of pellets from unrelated materials, in particular coal dust, lignite and the like. Like substances
DE540528C (en) Use of nitrogen-hardened steel for extrusion
AT140502B (en) Seat ring for valves or the like.
DE2748499A1 (en) Pressure limiter for hydraulic brakes - has thin wall construction with elastic deformable piston face to even out fluctuations
DE565010C (en) Sealing body of roof-shaped cross-section
DE1242854B (en) Process for the production of sealing rings
DE1047585B (en) Cross forging die for narrowing gradually turned and advanced pipe ends
DE935783C (en) Stamp lock for friction stamp
AT255235B (en) Extrusion device
DE648787C (en) Brake insert intended for yielding pit punches or for yielding route expansion and similar expansion types
DE559813C (en) Metallic self-sealing door for chamber furnaces for the production of gas and coke u. like
DE971448C (en) Automatic adjustment device for hydraulically operated friction brakes
DE1161228B (en) Device for profiling a can jacket made of sheet metal
AT109902B (en) Solderless pipe connection.
DE922222C (en) Adjustable iron friction stamp
AT136082B (en) Pneumatic wheel.
DE1900352B1 (en) Uninterrupted seat ring made of a material with high strength for fittings