Patent · US Expired

Method for compacting foundry mold making materials

US4529026A · kind A · utility

5Cited by

1References

2Claims

0Family size

Assignee

BMD Badische Maschinenfabrik Durlach GmbH · DE

Inventors

Alfons Kobel · Karlsruhe, DE
Norbert Damm · Karlsdorf-Neuthard, DE
Werner Geiger · Ebikon, CH

Key dates

Filing date	Dec 27, 1982
Grant date	Jul 16, 1985
Priority date	—
Expiry date	Dec 27, 2002

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22C15/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

In a process for compacting foundry mold making material, that is loosely heaped in a closed mold space over a pattern, the surface of the material is acted on by a compressed gas with a pressure of at the most 8 bar. This gas is caused to undergo expansion out of an inlet space through a valve in an opening at a gas flow rate of over 50 kg/sec and with a pressure increase rate of over 300 bar/sec, into the mold space. The maximum pressure in the inlet space or antichamber is 20 bar.

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