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:
Dec. 15, 1992
Filed:
Mar. 25, 1991
Alusuisse-Lonza Services Ltd., Zurich, CH;
Abstract
Upstream of the dies (14) internally insulated in the upper region is a casting furnace and a runner system, which latter comprises a distributor through feeding all the dies (14) with metal at an identical level (60). In the region situated below an inner ring (32), a gas cushion (54) which prevents direct contact of the die (14) with the molten metal (30) is maintained, and oil is injected into this region. A joint main having distribution lines conducts air or an inert gas having the same, slight overpressure into all the dies (14). The relative pressure between a desired value dependent on the metal level (H.sub.1) and computed by program and an actual value measured in the main (62) serves for regulation and monitoring. Upon overshooting of the programmed, maximum deviation of the controlled variable, a processor triggers a manipulated variable for the actuator of the pressure control valve.