Refractory coated casting mold

• US 3,286,312 A
• Filed: 03/29/1965
• Issued: 11/22/1966
• Est. Priority Date: 03/29/1965
• Status: Expired due to Term

• Current Assignee: John B. Mattuck, John L. Engelke, Richard S. Davis
• Original Assignee: John B. Mattuck, John L. Engelke, Richard S. Davis
• Inventors: Davis, Richard S., Engelke, John L., Mattuck, John B.
• Application Number:
  US04/443,435
• Time in Patent Office: 603 Days
• US Class Current: 249/134
• CPC Class Codes: B22C 23/02 Devices for coating moulds or cores
• CPC Class Codes: B22C 3/00 Selection of compositions for coating the surfaces of moulds, cores, or patterns
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Claims

1. A PERMANENT MOLD FOR CASTING MOLTEN METALS, COMPRISING (B) A THIN LAYER OF SIO2 COVERING THAT PORTION OF THE (A) A CAVITY SUITABLE FOR RECEIVING THE MOLTEN METAL TO BE CAST;

CAVITY SURFACE WHICH IS CONTACTED BY SAID MOLTEN METAL;

AND (C) A SUBSTRATE IN WHICH SAID CAVITY IS DEFINED, AT LEAST THAT PORTION OF SAID SUBSTRATE DIRECTLY IN CONTACT WITH SAID LAYER OF SIO2 BEING OF A MATERIAL CONTAINING CHEMICALLY BONDED SILICON IN A FORM WHICH IS READILU OXIDIZED TO SIO2 IN AN OXIDIZING ATMOSPHERE, SAID MATERIAL BEING ONE WHICH RETAINS ITS STRUCTURAL INTEGRITY AT THE MELTING TEMPERATURE OF THE METAL TO BE CAST.