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:
Nov. 22, 1994
Filed:
Nov. 06, 1992
Gary D Helgesen, Romulus, MI (US);
Robert G Rentschler, Dearborn, MI (US);
Thomas J Heater, Farmington Hills, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method for preparing an engine block casting having integral cylinder bore liners (10). A barrel slab core (14) includes barrel cores (18). Bore liners (10) surround the barrel cores (18) and are fixed in relation to the barrel slab core (14). A cylinder block mold core package (22) is assembled from the barrel slab core (14), and other cores (24, 26, 28). The liners (10) are heated while they are within the cylinder block mold core package (22) by induction heating. Access holes (30) are defined within the barrel slab core (14), each access hole (30) communicating with the interior of one barrel core (18). A heater (32) is inserted through each access hole (30). Thermal energy is thus transferred across the barrel core (18) to the cylinder bore liner (10) to assure optimum integrity of bonding between a solidified cylinder block casting and the cylinder bore liners (10). The heaters (32) are then retracted before adding the molten metal.