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:
Mar. 19, 1991
Filed:
May. 31, 1990
Applicant:
Inventor:
Ragnar Ekbom, Finsp.ANG.ng, SE;
Assignee:
ABB Stal Ab, Finspang, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
419 49 ; 419 38 ;
Abstract
The invention relates to a method for manufacturing a blade or vane of a turbine. A master of the blade or the vane is made of steel, and silicon rubber is molded around said master. The mold thus obtained is cut open and removed from the master to be used for producing a model of wax or the like, a mixture of graphite powder and a cement then being molded around said model. The model is melted and removed from the graphite mold which is filled with a compacted powder of metal or metal alloy. The mold with the powder compacted therein is isostatically hot pressed and then the mold is removed from the produced molded body by blasting.