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:
Sep. 17, 2002
Filed:
Apr. 19, 2001
Shinobu Kodama, Zama, JP;
Makoto Tsuji, Yamato, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
In a die-casting machine having an injection cylinder device ( ) for injecting molten material to a casting die and a boost cylinder device ( ) for boosting a hydraulic oil supplied to the injection cylinder device ( ), back-pressure of the injection cylinder device ( ) and back-pressure of the boost cylinder device ( ) are synchronously controlled by a flow-rate control valve ( ) capable of continuously adjusting flow-rate of the hydraulic oil discharging channel ( ). Accordingly, boosting characteristic can be made in accordance with burr critical boost curve, thereby avoiding burr occurrence in die-casting products in advance. Therefore, high-quality die-casting products without burrs can be manufactured even in a high-speed casting method or using low-accuracy dies.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile