Patent · US Expired

Method of manufacturing dry-pressed molded articles

US4473526A · kind A · utility

43Cited by

4References

11Claims

0Family size

Assignees

Eugen Buhler · DE
Hutschenreuther AG · DE

Inventors

Eugen Buhler · Thannhausen, DE
Klaus Strobel · Selb, DE
Karl Schwarzmeier · Selb, DE

Key dates

Filing date	Jan 12, 1981
Grant date	Sep 25, 1984
Priority date	—
Expiry date	Jan 12, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2998/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a method of manufacturing dry-pressed molded articles from essentially dry, pourable ceramic metal or carbon-containing molding compound in a mold of one or more parts, it is proposed to generate a negative pressure through the mold wall in the hollow space of the mold and, by means of the pressure difference generated as a result, to propel molding compound which is under pressure, for example, atmospheric pressure, through an injection opening into the hollow space of the mold and to precompress the molding compound in the mold while deaerating the molding compound, and that subsequently, the pneumatically precompressed molding compound is compression molded into a molded article having the desired final density.

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