Mold for direct press molding of optical glass element
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideo Torii, Masaki Aoki, Hideyuki Okinaka, Satoru Yuhaku, Shoji Nakamura
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Abstract
A mold used for manufacturing optical glass parts by the direct press molding of lumps of raw optical glass. The pressing surface of the mold is made of a material comprising .alpha. type SiC or amorphous SiC or a mixture of both. The pressing surface may be a coated film on a base body of hard alloy or high density carbon.
Claims6
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, characterized in that a pressing surface of said mold is made of a material comprising at least one of .alpha. type silicon carbide and amorphous silicon carbide.
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising a sintered body of a type silicon carbide.
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising:
- a base body of hard alloy having a surface in the form of a surface of an optical glass to be molded;
- and
- a film coated on said surface of said base body with a uniform thickness, said coated film comprising at least one of .alpha. type silicon carbide and amorphous silicon carbide.
A mold used for manufacturing optical glass parts by direct press molding of lumps of raw optical glass, comprising:
- a base body of carbon;
- a body of .beta. type silicon carbide deposited on said base body and having a surface in the form of a surface of a glass part to be molded;
- and
- a film coated on said surface of said .beta. type silicon carbide body with a uniform thickness, said coated film comprising at least one of .alpha. type silicon carbide and amorphous silicon carbide.
Dependencies are inferred from the claim text.