Invention Grant
- Patent Title: Method for producing mold
- Patent Title (中): 生产模具的方法
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Application No.: US12990396Application Date: 2009-04-27
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Publication No.: US08813829B2Publication Date: 2014-08-26
- Inventor: Yoshimitsu Ina , Shigeo Nakai , Toshiki Matsuo
- Applicant: Yoshimitsu Ina , Shigeo Nakai , Toshiki Matsuo
- Applicant Address: JP Tokyo
- Assignee: Kao Corporation
- Current Assignee: Kao Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2008-118940 20080430
- International Application: PCT/JP2009/058654 WO 20090427
- International Announcement: WO2009/133959 WO 20091105
- Main IPC: B22C1/22
- IPC: B22C1/22 ; B22C9/02

Abstract:
In production of a mold with the reclaimed spherical molding sand having a sphericity of 0.95 or more and mainly composed of Al2O3 together with the binder containing the acid-hardening resin and the hardening agent (I), at least one of the hardening agents (I) and (II) that is used in production of a mold from which the reclaimed molding sand is obtained contains the organic sulfonic acid, and in the hardening agent, a content of sulfuric acid is not more than 5% by weight and a content of phosphoric acid is not more than 5% by weight.
Public/Granted literature
- US20110100578A1 METHOD FOR PRODUCING MOLD Public/Granted day:2011-05-05
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