Patent ID: 6468458
Filing Date: 2002-10-22
Classification: B29C,B29K,B29L

Abstract:
A process for manufacturing a multi-layer composite product of injection molded plastic comprisingproviding a moveable mold part comprising at least a first mold cavity; providing a stationary mold part comprising at least a first mold core and a second mold core, the second mold core having less mass than the first mold core; aligning the first mold cavity with the first mold core, the first mold cavity and the first mold core having a first injection volume; injecting a first polymeric material through the first core and into the first injection volume to form a first layer; sequentially moving the moveable mold part having said first mold cavity and said first layer with respect to the stationary mold part to selectively align the first mold cavity with said first layer with the second mold core, the first mold cavity and the second mold core having a second injection volume, the second injection volume being greater that the first injection volume; injecting a second polymeric material through the second core into the second injection volume such that the second polymeric material is injected against the first layer to form the composite product and providing either the first layer of the polymeric material or the second layer of polymeric material with pigments or dyes to produce a colored appearance on the viewing surface of the composite product and to produce a covering surface congruent to the second layer of polymeric material for enhancing the appearance of the first layer of polymeric material.