Process for producing inorganic mold

• US 6,436,334 B1
• Filed: 05/14/1996
• Issued: 08/20/2002
• Est. Priority Date: 05/16/1995
• Status: Expired due to Fees

• Current Assignee: Fuji Oil Company Limited
• Original Assignee: Fuji Oil Company Limited
• Inventors: Maeda, Hirokazu, Hattori, Mitsuo, Furuta, Hitoshi
• Primary Examiner(s): DERRINGTON, JAMES H
• Application Number:
  US08/647,562
• Time in Patent Office: 2,289 Days
• Field of Search: 264/63, 264/219, 264/669, 249/134, 106/38.4
• US Class Current: 264/669
• CPC Class Codes: B22C 1/2293 Natural polymers B22C1/24, B22C1/26 take precedence
• CPC Class Codes: C04B 35/6365 Cellulose or derivatives thereof
• CPC Class Codes: C04B 35/66 Monolithic refractories or refractory mortars, including those whether or not containing clay making or repairing of linings F27D1/16

Abstract

A process for producing inorganic molds involving molding a kneaded mixture containing a particulate inorganic material and water, which process comprises adding water-soluble hemicellulose to the kneaded mixture. The process provides inorganic molds with excellent dispersion stability of the inorganic material particles and improved plasticity, workability including fillability and shape retention, as well as strength.

Claims

1. A process for producing an inorganic mold by molding of a kneaded mixture containing a particulate inorganic material and water, which process comprises extracting water-soluble hemicellulose from soybeans under acidic conditions at a pH near the isoelectric point of soybean protein, and adding said water-soluble hemicellulose to said kneaded mixture.

2. A process according to claim 1, wherein the mold is a fired mold, a metal founding sand-cast composition, or an amorphous refractory.

3. A process according to claim 2, wherein the fired mold is a refractory mold or ceramic.

4. A process for producing an inorganic mold by molding of a kneaded mixture containing a particulate inorganic material and water, which process comprises extracting water-soluble hemicellulose from soybeans under acidic conditions at a pH near the isoelectric point of soybean protein, and adding said water-soluble hemicellulose to said kneaded mixture, wherein the saccharide of said hemicellulose includes uronic acid in an amount at least 16.9% by weight of said saccharide.