Patent ID: 6866738
Filing Date: 2005-03-15
Classification: B29C,B29K,B29L,B32B,Y10T

Abstract:
1. A method for producing an intermediate product made of a fiber-reinforced composite composed of a reinforcing fiber impregnated with a thermosetting resin, comprising: (a) a first-step where a plurality of sheets made of said fiber-reinforced composite are laminated to each other, heated under a pressure by a hot press roll, and cooled under a pressure by a cold press roll to provide automatically a flat board-shaped laminate; (b) a second step where said flat board-shaped laminate is cut into a board; and (c) a third step where said board is softened by heating, placed on a forming tool, and formed by cooling under a pressure, wherein in said first step (a) said plurality of sheets made of said fiber-reinforced composite are heated at a temperature of 20-100° C. under 0.1 to 10 kg/cm 2 , and cooled at a temperature of 10-30° C. under 0.1 to 10 kg/cm 2 so as to avoid the generation of disordered fiber orientation of the fiber reinforced composite and the formation of insufficient stacking of the flat board-shaped laminate; and in said third step (c) said board is softened by heating at a temperature of 60-100° C. for 10-90 minutes placed on a forming tool, and formed by cooling at a temperature of 0-50° C. under a pressure of 0.1-10 kg/cm 2 so as to avoid the generation of disordered fiber orientation of the fiber reinforced composite and the occurrence of insufficient forming of said intermediate product and wherein said intermediate product is a semi-hardened product having a hardening degree of 1 to 80%, said fiber-reinforced composite being composed of a reinforcing fiber impregnated with a thermosetting resin.