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:
Jun. 18, 2002
Filed:
Apr. 27, 2001
Kiyoto Takizawa, Nagano-ken, JP;
Toshiyasu Koda, Nagano-ken, JP;
Yuji Hayashi, Nagano-ken, JP;
Mamoru Miyagawa, Nagano-ken, JP;
Nissei Plastic Industrial Co., Ltd., Nagano-Ken, JP;
Abstract
The invention has an object to permit to mold metal molds having a thixothropic structure by melting, agitating and weighing, injection molten metal in a melting vessel by combining separately functioning agitation means and injection means. The invention consists in supply granular metal material in a fusion vessel having a weighing chamber by a cylinder of required length communicating with a nozzle port at the extremity section, including rotatively an agitation means inside, and wherein an injection means whose extremity section is formed into an injection plunger is inserted advanceably and retractably into the center section of this agitation means . The metal material is heat melted by an external heat. The molten metal material is accumulated in the fusion vessel by homogenizing by the agitation means . A part of molten metal material is injection charged into a die at a temperature equal or superior to the solid phase line temperature and equal or inferior to the liquid phase line temperature, and molded into a metal mold having a thixothropic structure.