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:
Apr. 27, 2004
Filed:
Apr. 19, 2002
Matthias Blum, Büdingen, DE;
Georg Jarczyk, Grosskrotzenburg, DE;
Hans-Günther Fellmann, Blankenbach, DE;
Peter Busse, Aachen, DE;
Ald Vacuum Technologies AG, Hanau, DE;
Abstract
To produce precision castings from a melt, use is made of a metallic casting wheel ( ) which has an annular distribution channel ( ) and a plurality of interchangeable casting moulds ( ), each having at least one filling opening ( ). The melt quantity per casting operation is chosen here such that the casting moulds ( ) and the distribution channel ( ) are filled with the melt upon the rotation of the casting wheel ( ) about its axis (A—A), in such a way that after the solidification of the melt the precision castings are held together by a ring of the casting material which is formed in the distribution channel ( ), the so-called circulating material for new casting processes, and are removed from the casting wheel ( ) together with the casting moulds ( ), whereupon the precision castings are separated from the ring. In order to be able to produce precision castings with complicated three-dimensional shapes, in particular with undercuts, by this means as well, the casting moulds ( ), which can be used only once and are destructible for the purpose of demoulding, are selected from a ceramic material and are attached in a positive-locking and interchangeable manner to the casting wheel ( ) and so as to protrude therefrom. As a result, the circulating material can be fed uncontaminated to a recycling process.