Apparatus for forming articles from powdered metal

Abstract

Abstract AN APPARATUS FOR FORMING A UNITARY ARTICLE, SUCH AS A PRINTING DISK, FROM POWDERED METAL WHEREIN AT LEAST ONE GIVEN FACE OF THE ARTICLE IS REQUIRED TO HAVE A PREFERRED GRAIN DENSITY. A DIE, COMPLEMENTARY IN AREA AND CONFIGURATION TO THE GIVEN FACE, IS PROVIDED FOR FORMING THE GIVEN FACE OF SAID PREFERRED GRAIN DENSITY. THE FACE-FORMING DIE IS MOUNTED WITHIN AN APERTURE IN THE INNER WALL OF A MOLDING CAVITY WHEREIN THE APERTURE HAS AN OUTLET ON THE CAVITY AND IS DIMENSIONALLY GREATER THAN THE FACEFORMING DIE. A SPACE IS PROVIDED ABOUT THE FACE-FORMING DIE FOR THE ACCUMULATION OF A DISPOSABLE PORTION OF COMPACTED POWDERED METAL OF LESS THAN SAID PREFERRED GRAIN DENSITY, THE SPACE BEING PARTIALLY BOUNDED BY SURFACES AROUND SAID FACE-FORMING DIE AND SLOPING AWAY THEREFROM TO THE WALLS OF THE APERTURE. POWDERED METAL IS PLACED IN THE MOLD AND FORCED AGAINST THE FACE-FORMING DIE AND INTO THE PROVIDED SPACE, THEREBY FORMING A UNITARY ARTICLE HAVING A PREFERRED GRAIN DENSITY AT ONE OR MORE GIVEN FACE WHILE SIMULTANEOUSLY PROVIDING FOR THE ACCUMULATION OF THE DISPOSABLE PORTION OF LESS DENSE METAL WHICH MAY BE REMOVED IN SUBSEQUENT OPERATIONS. THE MOLDED ARTICLE IS SINTERED TO RELIEVE WORK-HARDENING AND THEN RESTRUCK TO INSURE SAID PREFERRED GRAIN DENSITY AND TO IMPROVE FACIAL DEFINITION. THE RESTRUCK ARTICLE MAY BE SUBJECTED TO FURTHER HEAT-TREATING OPERATIONS DEPENDING ON THE DESIRED PHYSICAL CHARACTERISTICS REQUIRED OF THE FINISHED ARTICLE.

Inventors

• 👤 F Dedek

Bibliographic Details