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:
Jan. 28, 2020
Filed:
Nov. 14, 2018
Toyo Seikan Group Holdings, Ltd., Shinagawa-ku, Tokyo, JP;
Toshiba Machine Engineering Co., Ltd., Numazu-shi, Shizuoka, JP;
Toyohiko Nakatani, Yokohama, JP;
Kentarou Ichikawa, Yokohama, JP;
Hideo Tanaka, Numazu, JP;
Kazuhito Sato, Numazu, JP;
Kishbaugh Levi, Groveland, MA (US);
TOYO SEIKAN GROUP HOLDINGS, LTD., Tokyo, JP;
TOSHIBA MACHINE ENGINEERING CO., LTD., Shizuoka, JP;
Abstract
An injection apparatus including a plasticizing unit () that plasticizes a raw material resin and an injection unit () that injects a plasticized molten resin. The plasticizing unit includes a heating cylinder () having a foaming gas injection valve and a screw () provided inside the heating cylinder. The rotation and advance and retreat movements of the screw are controlled such that a raw material resin is plasticized by the screw and a foaming gas injected from a foaming gas injection valve is dissolved in the plasticized molten resin. After the screw retreats to a prescribed position according as the molten resin accumulates in the front end side of the heating cylinder by the screw that is rotating, the screw advances with rotating to cause the molten resin which has been accumulated in the front end side of the heating cylinder to be transferred to the injection unit.