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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.:

US 10625459 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Aug. 18, 2014

Vented twin-screw kneading extrusion apparatus and extrusion method

Applicant:

The Japan Steel Works, Ltd., Tokyo, JP;

Inventors:

Yohei Shimizu, Hiroshima, JP;

Jun Kakizaki, Hiroshima, JP;

Kiyoshi Handa, Hiroshima, JP;

Assignee:

THE JAPAN STEEL WORKS, LTD., Tokyo, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Mark Halpern

Int. Cl.
CPC ...
B29B 7/94 (2006.01); B29C 48/76 (2019.01); B29B 7/84 (2006.01); B29C 48/285 (2019.01); B29C 48/29 (2019.01); B29C 44/20 (2006.01); B29C 44/34 (2006.01); B29K 21/00 (2006.01); B29K 7/00 (2006.01); B29C 48/00 (2019.01); B29C 48/03 (2019.01); B29B 7/48 (2006.01); B29K 105/04 (2006.01);
U.S. Cl.
CPC ...
B29C 48/767 (2019.02); B29B 7/845 (2013.01); B29B 7/94 (2013.01); B29C 44/20 (2013.01); B29C 44/3449 (2013.01); B29C 48/29 (2019.02); B29C 48/297 (2019.02); B29B 7/483 (2013.01); B29C 48/022 (2019.02); B29C 48/03 (2019.02); B29K 2007/00 (2013.01); B29K 2021/00 (2013.01); B29K 2105/04 (2013.01);
Abstract

According to the present invention, devolatilization of a synthetic resin formed from a polymer or synthetic rubber can be improved and the synthetic resin can be foamed at a low temperature by injecting a devolatilization agent through a devolatilization agent injection nozzle provided in a downstream end segment cylinder of a cylinder assembly. In a vented twin-screw kneading extrusion apparatus and extrusion method according to the present invention, a devolatilization agent, which is injected through a downstream end devolatilization agent injection nozzle () provided on a downstream end segment cylinder constituted by a segment cylinder () positioned on a downstream end of a cylinder assembly (), is dispersed in molten resin in the downstream end segment cylinder () and kneaded by a downstream end kneading portion () such that the molten resin is foamed by the devolatilization agent and then extruded.

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