Patent ID: 7845934
Filing Date: 2010-12-07
Classification: B29C,B29K,B29L,Y10S

Abstract:
1. A plastic molding die comprising a first main die having a concave optical surface and a second main die having a convex optical surface and provided with a cavity therebetween where a plastic material is put in, wherein a part of an inner surface of the cavity other than a molding portion comprises an elastic body which is unitary and directly contacts the plastic material, the molding portion corresponding to a molding surface of a molded product being disposed on the inner surface of the cavity and an outer periphery of the molded product being defined by the inner surface of the cavity; and wherein the elastic body is engaged with an engagement groove which is disposed on the inner surface of the cavity and has a circular shape wherein the engagement groove includes a clearance groove at a back of the engagement groove for facilitating an elastic deformation of the elastic body with ease due to elasticity of the elastic body.