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:
Sep. 24, 2019
Filed:
Jul. 05, 2017
L.e. Jones Company, Menominee, MI (US);
Cong Yue Qiao, Menominee, MI (US);
David M Doll, Houston, TX (US);
Donald K Morris, Peshtigo, WI (US);
Howard Delorme, Jr., Menominee, MI (US);
L.E. Jones Company, Menominee, MI (US);
Abstract
A method of casting valve seat inserts comprises pouring molten metal into a gating system of a mold plate stack wherein mold plates are located between top and bottom molds wherein the gating system includes a casting header, down-sprue, horizontal sprue, up-sprues, runners, and gates in fluid communication with mold cavities configured to form the valve seat inserts. The method includes filling the mold cavities with the molten metal, and controlling solidification of the molten metal in the mold cavities by means of an outer thermal barrier which retards heat transfer in mold plate material between the mold cavities and an outer periphery of the mold plate stack. An inner thermal barrier can be used to further control solidification of the molten metal. Valve seat inserts produced using the thermal jacket molds can exhibit an improved microhardness distribution which provides improved machining and higher yield.