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:
Oct. 22, 2013
Filed:
Nov. 04, 2008
Takao Nakamura, Akashi, JP;
Akihiro Yamanaka, Akashi, JP;
Hiroshi Yukutomo, Akashi, JP;
Kenji Fujii, Akashi, JP;
Takao Nakamura, Akashi, JP;
Akihiro Yamanaka, Akashi, JP;
Hiroshi Yukutomo, Akashi, JP;
Kenji Fujii, Akashi, JP;
Toyo Machinery & Metal Co., Ltd., Hyogo, JP;
Abstract
A hydraulic circuit of an injection cylinder in a die-casting apparatus, which can achieve IN restriction and OUT restriction in a quickly switchable manner with a single circuit and which allows manufacturing of a high-quality molded product. The hydraulic circuit includes: a first pressure oil path supplying pressure oil to the injection cylinder; a second pressure oil path returning the pressure oil from the injection cylinder; a first flow control valve controlling a flow of the pressure oil through the first pressure oil path; a second flow control valve controlling a flow of the pressure oil through the second pressure oil path; a bypass pressure oil path connected to the second pressure oil path for bypassing the second flow control valve; a bypass on-off valve provided on the bypass pressure oil path and opening/closing the bypass pressure oil path with the pressure oil; and a controller controlling each valve.