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:
Nov. 14, 2006
Filed:
Jan. 22, 2004
Kazumi Ohtake, Toyota, JP;
Akira Manabe, Aichi-ken, JP;
Yoshihiro Hibino, Aichi-ken, JP;
Takahiro Sato, Chiryu, JP;
Kazufumi Niwa, Kariya, JP;
Kazumi Ohtake, Toyota, JP;
Akira Manabe, Aichi-ken, JP;
Yoshihiro Hibino, Aichi-ken, JP;
Takahiro Sato, Chiryu, JP;
Kazufumi Niwa, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin Takaoka Co., Ltd., Toyota, JP;
Abstract
A method of die casting spheroidal graphite cast iron able to prevent formation of chill crystals to allow the crystallization of fine spheroidal graphite and simultaneously prevent the formation of internal defects, including the steps of preparing a die formed with a heat insulation layer at inside walls of a cavity, filling molten metal having a composition of the spheroidal graphite cast iron through a runner into the cavity, closing the runner so as to seal the cavity right before the molten metal in the cavity starts to solidify, and allowing the molten metal to solidify by the action of the inside pressure caused by crystallization of the spheroidal graphite in the sealed cavity.