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Patent Searching and Data


Title:
MANUFACTURE OF BELLOWS
Document Type and Number:
Japanese Patent JPH11351386
Kind Code:
A
Abstract:

To improve the yield of product and working efficiency while preventing the generation of wrinkle and scraping of rubber with the installation of a foundation cloth by winding the foundation cloth previously formed corresponding to the cross sectional shape of a bellows around a bellows pre-form made of the unvulcanized rubber for vulcanization.

A foundation cloth 10 is previously formed by using a die in response to the cross section shape of a wall surface part of a bellows. A bellows rubber pre-form 11 made of the unvulcanized rubber is pressed for forming with the die 21. The pre-formed foundation cloth 10 is fitted onto the bellows rubber pre-form 11 ejected in the condition that it is installed in a core 22. Since the foundation cloth 10 is previously formed, the foundation cloth 10 can be surely fitted along the bellow-like wall surface part of the bellows rubber pre-form. Continuously, vulcanization of the bellows rubber pre-form 11 wound with the basic cloth 10 is performed by pressurizing and heating with a die 41. Since the pre-formed foundation cloth 10 is used, generation of wrinkle, scraping and scratch of the rubber with the installation of the foundation cloth is restricted.


Inventors:
Sato, Yuji
Application Number:
JP1998000174133
Publication Date:
December 24, 1999
Filing Date:
June 05, 1998
Export Citation:
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Assignee:
FUJIKURA RUBBER LTD
International Classes:
F16J3/04; F16F3/10; (IPC1-7): F16J3/04; F16F3/10
Attorney, Agent or Firm:
皿田 秀夫 (外1名)