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:
Feb. 05, 2019
Filed:
Sep. 11, 2014
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 37/16 (2006.01); B21D 22/02 (2006.01); B21D 22/20 (2006.01);
U.S. Cl.
CPC ...
B21D 37/16 (2013.01); B21D 22/022 (2013.01); B21D 22/208 (2013.01);
Abstract
In hot press forming a thin steel sheet K, when cooling the thin steel sheet K by supplying a refrigerant to an ejection hole () communicated from a supply path () inside a lower mold (), precooling in which an ejection amount per unit time period of the refrigerant from the ejection hole () is suppressed is carried out, and thereafter, main cooling is carried out by increasing the ejection amount per unit time period.