Patent · US Expired

Method and apparatus for freeing a pattern or shaping element from foundry material

US4593740A · kind A · utility

9Cited by

2References

17Claims

0Family size

Inventor

Eugen Buhler · Thannhausen, DE

Key dates

Filing date	Aug 31, 1983
Grant date	Jun 10, 1986
Priority date	—
Expiry date	Aug 31, 2003

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22C17/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A foundry mold making machine is so designed that at the start of the process of moving the pattern assembly clear of the mold, compressed air is supplied through the pattern assembly until a gap or narrow space has been formed between the mold and the pattern. In this respect an air-tight connection is maintained between the pattern plate support and the flask until the compressed air supplied to the gap has been relaxed. In this way it is possible to make certain that there is no damage to the edges of the mold by suddenly letting off air.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.