The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1991
Filed:
May. 24, 1990
Theodor Gormanns, Erkelenz, DE;
Siegfried Radewahn, Monchen-Gladbach, DE;
Walter Solty, Huckelhoven, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
The present invention relates to a method and apparatus for the manufacture of finished parts by the sintering of compacts which are formed as composite moldings of a pulverulent base material and at least one other pulverulent material, particularly different metal powders. The compacts are produced in the manner that at least one of the powder materials is introduced in pourable condition directly alongside of an already pre-compacted part of the compact into the mold which has a shell-shaped matrix and the powder materials are subjected together to final compacting by plug forces acting from on top and on bottom to the size desired for the sintering. In order to improve the traditional method so that moldings with vertically extending separation lines between the individual portions of the composite material can be produced without the previous disadvantages and provide an apparatus on which the compacts can be produced in accordance with this method, at least two powder materials are introduced, one after the other, in pourable condition into the individual regions of the filling volume of the mold which are to be opened, at least one pre-compacting of the powder material already introduced being affected until dimensional stability is obtained before the next powder material is introduced alongside of the pre-compacted material and is pre-compacted in similar manner, and that only then is the joint final compacting effected.