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. 01, 1976
Filed:
Aug. 26, 1974
Applicant:
Inventors:
Tetsuo Nakazawa, Tokyo, JA;
Osamu Nishida, Saitama, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 4251 ;
Abstract
A process for regulating the hardening speed of a self-hardening mold which comprises adding an alcohol as a hardening speed regulating agent when a mold is formed with molding sand prepared by adding a polyvinyl alcohol solution and a boron compound to refractory particles and then kneading the mixture. As the hardening speed regulating agent, polyhydric alcohol such as ethylene glycol, mannitol, sorbitol, glycerol, etc., and monohydric alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, etc., may be used.