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:
Jul. 22, 1986
Filed:
Jul. 01, 1983
Christer Aslund, Torshalla, SE;
Torbjorn Andersson, Eskilstuna, SE;
Nyby Uddeholm Powder AB, , SE;
Abstract
A method and an apparatus for producing moulded blanks by hot-pressing metal powder, preferably spherical metal powder, inside a thin-walled capsule comprising an outer sleeve (2), an insertion sleeve (4) disposed approximately centerally inside the latter, a base (3) and a cover (5), inside which one separable mould (1) of solid material may be inserted. The mould (1) and the two sleeves (2, 4) are dimensioned in such a way that between the inner insertion sleeve (4) and the mould (1) there is formed a mould cavity into which the metal powder may be poured. After the metal powder is poured in, the still open capsule is subjected to a preliminary compression by means of vibration. The capsule is subsequently closed in a gas-tight manner by means of the cover (5). Then the metal powder inside the capsule is subjected to a heat-isostatic pressing at an elevated pressure and an elevated temperature of approximately 1000.degree. to 1200.degree. C. In this way moulding blanks with a very high degree of accuracy are obtained.