COATING MATERIAL FOR GREEN SAND MOLD

Title:

COATING MATERIAL FOR GREEN SAND MOLD

Document Type and Number:

Japanese Patent JP3123029

Kind Code:

B2

Abstract:

PURPOSE: To provide the coating material for green sand molds for improving the surface stability of the green sand molds.
CONSTITUTION: The coating material for green sand molds consists of polyhydroxy alcohol. Glycerol is most preferably used as the polyhydroxy Malcohol. The coated amt. at the time of coating the green sand mold surface with the polyhydroxy alcohol is 10 to 60g per 1m2 green sand mold surface. The polyhydroxy alcohol has good affinity to water and, therefore, well holds the water of the green sand mold surface, thereby preventing the evaporation of the moisture on the green sand mold surface. A casting having less defects on the surface is, therefore, obtd. if the casting is produced by using the green sand mold coated with the polyhydroxy alcohol. Since the polyhydroxy alcohol sticking to the green molding sand is easily evaporated and decomposed by the heat of molten metal, the once used green molding sand is reusable many times.

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Inventors:

Mitsuru Sakai
Masahiko Kagitani

Application Number:

JP24572592A

Publication Date:

January 09, 2001

Filing Date:

August 20, 1992

Export Citation:

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Assignee:

Kao Corporation

International Classes:

B22C3/00; C07C31/22; (IPC1-7): B22C3/00

Domestic Patent References:

JP5680343A
JP5820344A
JP62168636A
JP62168637A

Attorney, Agent or Firm:

Shigeki Okumura

Previous Patent: JPH03123028

Next Patent: SURFACE EMITTING TYPE SEMICONDUCTOR LASER IN LONG WAVELENGTH RANGE