The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2024
Filed:
Sep. 26, 2018
Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine
The Japan Steel Works, Ltd., Tokyo, JP;
Akira Yasue, Hiroshima, JP;
Hideki Chiba, Hiroshima, JP;
Daisuke Kunihiro, Hiroshima, JP;
Shoso Nishida, Hiroshima, JP;
Kazuya Tsuji, Hiroshima, JP;
Yasufumi Fujita, Hiroshima, JP;
Kazuki Fujita, Hiroshima, JP;
Yukihiro Sumihiro, Hiroshima, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
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.