Patent ID: 6077472
Filing Date: 2000-06-20
Classification: B29C,Y10T

Abstract:
A method of shaping molded articles comprising the step of performing injection molding using a heat insulating layer coated mold, comprising:a metallic main mold coated having a first inner surface coated with a heat-resistant polymer wherein said heat-resistant polymer is a heat insulating layer 0.05 to 1.0 mm thick having a second inner surface opposite to the metallic main mold,and wherein said heat-resistant polymer coated metallic main mold is coated with a heat insulating material made of a heat-resistant polymer incorporating 5 to 50 wt % of a fine powder made of inorganic matter having an average particle size of 0.001 to 50 .mu.m, wherein said inorganic matter containing heat insulating material layer forms a third inner surface defining a die cavity; and the third inner surface has fine asperities having a center-line-average roughness (Ra) of 0.1 to 10 .mu.m, a maximum height (Rmax) of 1 to 100 .mu.m, a ten-point-average roughness (Rz) of 1 to 100 .mu.m and an average spacing between local peaks (S) of 0.01 to 0.5 mm.