Patent ID: 6228308
Filing Date: 2001-05-08
Classification: B29B,B29C,B29K

Abstract:
A method for molding a fiber-reinforced thermoplastic resin, comprising injecting into a mold a fiber-reinforced thermoplastic resin which has been plasticized by a plasticizing apparatus for molding having a screw (1), a screw head (3), a cylinder (4), and a cylinder head (4a) surrounding the screw (1) and the screw head (3), a nozzle (6) attached to a forward end of the cylinder head (4a), a heater (5) mounted to the cylinder (4), a hopper (7), and a screw reciprocating drive (8); wherein the screw (1) comprises a feed section (Sf) for heating and conveying the fiber-reinforced thermoplastic resin, a compression section (Sc) for melting and kneading the heated resin conveyed from the feed section (Sf), and a metering section (Sm) for conveying the melt-kneaded resin conveyed from the compression section (Sc) to the nozzle (6), and wherein a screw lead length Lc.sub.i of the compression section (Sc) decreases in a direction toward a forward end of the screw.