Method of forming mold release film

Details Method of forming mold release film Method of forming mold release film

1997-02-11

1998-03-03

Bell, Janyce

Coating processes

Mold coating

427230, 427367, 20419215, B05D 312

Patent

active

057231745

ABSTRACT:
In a method of forming a mold release film on at least molding surfaces of a mold comprising an upper die, a lower die, and a cylindrical die for press molding of an optical element, a TiAlN film is formed on the molding surfaces of the mold and is polished so as to yield a center-line mean roughness of about 1 nm or less, thereby improving the mold in terms of durability, heat resistance, specular characteristic, and the like while improving releasability of the mold and a molded article with respect to each other. A TiAlN film (1) is formed on molding surfaces (31a, 32a) of upper and lower dies (31, 32) by a sputtering technique or the like. Thus formed TiAlN film (1) is polished till its center-line mean roughness becomes about 1 nm. Accordingly, the molding surfaces (31a, 32a) are prevented from being discolored or becoming rough due to heat, whereby the mold can be improved in terms of durability, heat resistance, and the like.

REFERENCES:
patent: 5569474 (1996-10-01), Kitaichi et al.

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