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. 20, 2015
Filed:
Aug. 02, 2012
Haisei Hayashi, Shizuoka, JP;
Yuji Mochizuki, Shizuoka, JP;
Shigenori Saito, Tokyo, JP;
Kenji Yuza, Tokyo, JP;
Hiroaki Sata, Shizuoka, JP;
Hirohumi Sugihara, Shizuoka, JP;
Haisei Hayashi, Shizuoka, JP;
Yuji Mochizuki, Shizuoka, JP;
Shigenori Saito, Tokyo, JP;
Kenji Yuza, Tokyo, JP;
Hiroaki Sata, Shizuoka, JP;
Hirohumi Sugihara, Shizuoka, JP;
Nippon Light Metal Company, Ltd., Tokyo, JP;
Nikkeikin Aluminium Core Technology Co., Ltd., Tokyo, JP;
Abstract
An extrusion die is provided with a male die through which a billet is extruded from an upstream side to a downstream side and, the male die adapted for forming an inside shape of a hollow material; and a female die for holding the male die and forming an outside shape of the hollow material. The male die is formed of a spider and a holder for holding the spider. The spider is formed of a mandrel and a plurality of bridge parts for supporting the mandrel, and enabling a distal-end outer peripheral surface to engage with a bridge-holding surface. The distal-end outer peripheral surface of each of the bridge parts and the bridge-holding surface of the holder are joined by shrink-fitting.