The Japan Steel Works, Ltd.

Daisuke Kunihiro

Shoso Nishida

Kazuki Fujita

Akira Yasue

Kazuya Tsuji

Yasufumi Fujita

Hideki Chiba

Yukihiro Sumihiro

The present invention provides a kneading method for a fiber-reinforced thermoplastic resin with which dispersibility of reinforcement fibers is enhanced and sufficient reinforcement fibers having a proper fiber length remain, and a fiber-reinforced thermoplastic resin plasticizing device and an extruding machine for carrying out the method. The kneading method comprises supplying a thermoplastic resin and reinforcement fibers into a cylinder of a plasticizing device, and rotating a screw to obtain a fiber-reinforced thermoplastic resin, wherein the size of a clearance between the bore of the cylinder and the screw is made different between an upstream side in the vicinity of a reinforcement fiber loading port and a downstream side, so that the clearance becomes larger from the vicinity of the reinforcement fiber loading port toward the downstream side compared with the upstream side.

Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine

The present invention addresses the problem of providing a molding method capable of molding a molded article having excellent strength and reducing manufacturing costs by shortening a molding cycle when obtaining a molded article from a fiber-reinforced thermoplastic resin by compression molding. The present invention relates to a molding method which obtains a fiber-reinforced thermoplastic resin by kneading a thermoplastic resin and a reinforcing fiber (), and a molded article from the fiber-reinforced thermoplastic resin by compression molding. The molding method of the molded article comprising the fiber-reinforced thermoplastic resin according to the present invention comprises: a molding step for obtaining a first molded article from a predetermined amount of a fiber-reinforced thermoplastic resin through a molding die (); a carrying-in step for opening the molding die (), taking out the first molded article, and inserting the first molded article into a cooling die (); and a compression cooling step for cooling the first molded article by compressing the first molded article through the cooling die ().

Molding method and molding apparatus of molded article comprising fiber-reinforced thermoplastic resin

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Hiroshima, Japan

Daisuke Kunihiro