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:
Jan. 01, 1980
Filed:
Oct. 06, 1978
Richard C Ostrowski, Dunlap, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A method of drying a refractory slurry layer deposited on a mold pattern (10) formed of a thermally fusible material having low heatability by subjection to microwave energy (E), to form a shell mold. The mold pattern (10) is coated with a slurry layer and is subjected to microwave energy (E) sufficient to heat the refractory slurry. A portion of the liquid phase of the heated slurry is withdrawn while concurrently cooling the slurry and mold pattern to maintain the mold pattern at a temperature subjacent the fusion temperature of the mold pattern material. The mold pattern (10) may be recoated, resubjected concurrently to microwave energy (E) and withdrawal of the liquid phase of the slurry until the slurry is effectively dried in the mold pattern while effectively preventing undesirable thermal distortion of the mold pattern.