Title:
METHOD FOR PRODUCING TIRE VULCANIZATION MOLD, AND TIRE VULCANIZATION MOLD
Document Type and Number:
WIPO Patent Application WO/2012/011483
Kind Code:
A1
Abstract:
A root portion (7a) which projects from a surface (12a) of a plaster casting mold (12) for a sipe blade (7) is covered by a coating layer (10) made of an easily collapsible refractory material, and a string-shaped exhaust hole forming member (11) made of a casting refractory material is attached to the sipe blade (7) so as to be in contact with the coating layer (10). Molten metal (M) is poured onto the surface (12a) of the plaster casting mold (12) under these conditions to transfer the shape of the surface (12a), and to cast a mold in which the root portion (7a) of the sipe blade (7) is cast. Thereafter, the coating layer (10) is removed to form a slit around the root portion (7a) of the sipe blade (7), the exhaust hole forming member (11) is removed to form an exhaust hole connecting to the outside of the piece, and the slit and the exhaust hole are connected. Thereby, a mold having an exhaust mechanism can be easily produced.
Inventors:
ENOKIDO KENJI (JP)
Application Number:
PCT/JP2011/066412
Publication Date:
January 26, 2012
Filing Date:
July 20, 2011
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
ENOKIDO KENJI (JP)
ENOKIDO KENJI (JP)
International Classes:
B29C33/38; B22C9/02; B22C9/28; B29C33/02; B29C33/10; B29C35/02
Foreign References:
| JP2005193577A | 2005-07-21 | |||
| JP2006212849A | 2006-08-17 | |||
| JPH11300746A | 1999-11-02 | |||
| JP2003236642A | 2003-08-26 | |||
| JPS62199242A | 1987-09-02 |
Attorney, Agent or Firm:
FUKUMOTO, Masahiko (JP)
Masahiko Fukumoto (JP)
Masahiko Fukumoto (JP)
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Claims: