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. 14, 2002
Filed:
Nov. 22, 1999
Masaki Usui, Kyoto, JP;
Denken Co., Ltd., Kyoto, JP;
Abstract
While rotating a chamber with a crucible for heating ingots of metal and a mold for receiving molten metal from the crucible enclosed therein from a normal position to a reversed position, when an arrival of the chamber at a preset reference position is detected by a rotary plate and a position sensor , a pressure gas is introduced into the chamber at a time point delayed from the reference position by a preset delay time. The delay time is preset so that the pressurize gas starts pressing the molten metal into a sprue runner immediately after a mouth of the sprue runner is completely closed by the molten metal poured from the crucible . Thus, the molten metal is promptly pressed through the sprue runner into a cavity of the mold before it starts solidifying due to the contact with the mold having a temperature lower than that of the molten metal.