DE497898C - Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber - Google Patents

Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber

Info

Publication number
DE497898C
DE497898C DER61905D DER0061905D DE497898C DE 497898 C DE497898 C DE 497898C DE R61905 D DER61905 D DE R61905D DE R0061905 D DER0061905 D DE R0061905D DE 497898 C DE497898 C DE 497898C
Authority
DE
Germany
Prior art keywords
rubber
production
hollow
mold core
wheel tires
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
DER61905D
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DER61905D priority Critical patent/DE497898C/en
Application granted granted Critical
Publication of DE497898C publication Critical patent/DE497898C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601Vulcanising tyres; Vulcanising presses for tyres
    • 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
    • B29C33/44Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/54Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles made of powdered or granular material

Landscapes

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

Description

Formkern zur Herstellung von hohlen Radreifen und ähnlichen Hohlkörpern aus Gummi Die Erfindung betrifft einen Formkern zur Herstellung von hohlen Radreifen und ähnlichen Hohlkörpern aus Gummi.Mold core for the production of hollow wheel tires and similar hollow bodies Made of rubber The invention relates to a mold core for the production of hollow wheel tires and similar hollow bodies made of rubber.

Es wurde bereits vorgeschlagen, zur Herstellung von Hohlkörpern aus Gummi oder anderen vulkanisierbaren Stoffen einen Kern aus einer leicht schmelzbaren Metallegierung zu verwenden. Dieser Metallkern wird mit einer Zwischenhülle umgeben, auf der die äußere Umhüllung liegt, die den Hohlkörper bilden soll. Die Zwischenhülle wird durch Umwickeln des Kernes mit einem vulkanisierten Gummiband gebildet, auf das ein Leinewandband gelegt ist.It has already been proposed for the production of hollow bodies Rubber or other vulcanizable materials have a core made of an easily meltable To use metal alloy. This metal core is surrounded by an intermediate cover, on which the outer envelope lies, which is to form the hollow body. The intermediate cover is formed by wrapping a vulcanized rubber band around the core that a linen wall tape is laid.

Der so hergestellte Hohlkörper ist ungleichförmig, da er von einer äußeren Masse aus vulkanisiertem Gummi, einer inneren Hülle aus Leinewand und einer innersten Hülle aus vulkanisiertem Gummi gebildet wird. Die innerste Hülle besteht aus losen Windungen, da der vulkanisierte Gummi unter Einfluß der Wärme sich nicht in seinen einzelnen Lagen verbindet. Außerdem ist die Ausführung dieses Verfahrens schwierig, da die Entleerung des Kerns erfolgen muß, solange er noch eine hohe Temperatur besitzt, und zwar sehr schnell, damit das Metall nicht im Innern der äußeren Hülle erstarrt.The hollow body produced in this way is non-uniform because it is of a outer mass made of vulcanized rubber, an inner cover made of canvas wall and one innermost shell is formed from vulcanized rubber. The innermost shell consists from loose turns, since the vulcanized rubber does not move under the influence of heat connects in its individual layers. Also, the execution of this procedure difficult because the core must be emptied while it is still at a high temperature very quickly so that the metal does not get inside the outer shell stiffens.

Die Erfindung betrifft eine Verbesserung des Formkerns zur Herstellung hohler Gegenstände und besteht im wesentlichen darin, daß die den entfernbaren Kern umgebende Zwischenhülle aus demselben Stoff (vorzugsweise Gummi) ist wie die äußere Umhüllung, die man formen will, und daß das Füllmittel aus einem pulverförmigen Stoff, z. B. Sand, besteht, mit dem die Zwischenhülle prall gefüllt wird. Bei der Vulkanisation vereinigt sich die Zwischenhülle mit der äußeren Hülle, um einen gleichmäßigen Block zu bilden.The invention relates to an improvement in the mold core for manufacture hollow objects and consists essentially in the fact that the removable core surrounding intermediate cover made of the same material (preferably rubber) as the outer one Sheath that you want to shape, and that the filler from a powdery Fabric, e.g. B. sand, with which the intermediate shell is filled to the brim. In the Vulcanization unites the intermediate shell with the outer shell to create a uniform one Block to form.

Die Zeichnung zeigt eine Ausführungsform des Verfahrens gemäß der Erfindung.The drawing shows an embodiment of the method according to FIG Invention.

Der entfernbare Kern b aus Sand oder einem anderen pulverförmigen Stoff, auf dem die äußere Gummihülle c hohl geformt werden soll, ist mit einer Zwischenhülle a umgeben, die gleichfalls aus Gummi, und zwar zur Erhaltung der Form aus vulkanisiertem Gummi besteht. Diese Zwischenhülle oder Tasche a wird außen mit einer Gummilösung bestrichen. Bei der Vulkanisation vereinigen sich .die äußere Hülle c und die Zwischenhülle a, so daß sie nach Entfernung des Kernes b durch den in der Zeichnung punktierten Kanal nur noch einen gleichmäßigen Block bilden.The removable core b made of sand or other powdery Fabric on which the outer rubber cover c is to be molded hollow is with an intermediate cover a, which is also made of rubber, namely to maintain the shape of vulcanized Rubber is made. This intermediate cover or pocket a is on the outside with a rubber solution coated. During vulcanization, the outer shell c and the intermediate shell unite a, so that after removal of the core b by the dotted in the drawing Channel only form an even block.

Wie bereits einleitend gesagt, findet der neue Formkern besonders Anwendung für die Herstellung der Radreifen für Kraftwagen, und zwar solcher Reifen, die in ihrem Innern eine ringförmige Reihe von gegeneinander durch Gummiwände abgeschlossenen, luftgefüllten Hohlräumen besitzen. Zur Bildung dieser Hohlräume setzt man die nach der Erfindung hergestellten Kerne in die Form ein.As already said in the introduction, the new mold core is special Application for the production of wheel tires for motor vehicles, namely tires, which inside a ring-shaped row of mutually closed off by rubber walls, have air-filled cavities. In order to form these cavities, the cores made of the invention into the mold.

Claims (1)

PATENTANSPRUCH: Formkern zur Herstellung von hohlen Radreifen und ähnlichen Hohlkörpern aus Gummi und anderen vulkanisierbaren Stoffen, dadurch gekennzeichnet, daß er aus einer Hülle (a) aus vulkanisiertem Stoff besteht, die prall mit einem pulverförmigen Stoff (b), z. B. Sand, gefüllt ist. PATENT CLAIM: Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber and other vulcanizable substances, characterized in that it consists of a shell (a) made of vulcanized material, which is taut with a powdery material (b), e.g. B. sand, is filled.
DER61905D Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber Expired DE497898C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER61905D DE497898C (en) Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER61905D DE497898C (en) Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber

Publications (1)

Publication Number Publication Date
DE497898C true DE497898C (en) 1930-05-15

Family

ID=7411769

Family Applications (1)

Application Number Title Priority Date Filing Date
DER61905D Expired DE497898C (en) Mold core for the production of hollow wheel tires and similar hollow bodies made of rubber

Country Status (1)

Country Link
DE (1) DE497898C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820574A1 (en) * 1988-06-16 1989-12-21 Agia Ag Fuer Ind Anwendungstec Lost mould core

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820574A1 (en) * 1988-06-16 1989-12-21 Agia Ag Fuer Ind Anwendungstec Lost mould core

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