Patent ID: 6146122
Filing Date: 2000-11-14
Classification: B29C

Abstract:
A resin transfer mold having a lower mold with a base and a core, and an upper mold for forming a laminated sheet into a predetermined shape in cooperation with said core, said resin transfer mold further comprising:a pressure plate, separate from said upper mold and said lower mold, to be placed on a laminated sheet to be placed on said core and having a flat lower surface for firmly pressing and holding said laminated sheet against an upper surface of said core by weight of said pressure plate without being creased; andsaid pressure plate having an elastic means placed in a hole in an upper surface of said pressure plate and extending between said pressure plate and an upper wall of said upper mold wherein, when said upper mold is lowered toward said core, said upper wall moves toward said pressure plate and compresses said elastic means by the weight of said upper mold for increasing a pressure to a part of said laminated sheet on said upper surface of said core before the side walls of said upper mold press flange parts of said laminated sheet firmly against side surfaces of said core such that said dart is able to extend toward said flange parts to thereby prevent said part from being creased.