Patent ID: 7377478
Filing Date: 2008-05-27
Classification: B29C,B29D,B29L,G02B,Y10S

Abstract:
1. A mold assembly comprising: (A) a mold comprising a first mold member and a second mold member for molding a light guide plate made of a transparent resin, in which a cavity is formed when the mold is clamped; (B) a molten resin injection portion provided in the first mold member and/or the second mold member and provided for introducing a molten transparent resin into the cavity; and (C) an insert block provided in the first mold member and provided for partly constituting the cavity, the insert block being for use for molding a first main surface of the light guide plate having said first main surface and a second main surface opposite to said first main surface, said first main surface having a surface portion provided with convex portions having a height of 5×10 the insert block comprising: an insert block body made of zirconia ceramics or electrically conductive zirconia ceramics; and a metal layer that is formed on the surface of the insert block body facing the cavity and is provided with concave portions for forming the convex portions of the light guide plate.