Method of making a cylinder head or other article with cast in-s

Details Method of making a cylinder head or other article with cast in-s Method of making a cylinder head or other article with cast in-s

1991-03-11

1993-10-12

Rosenbaum, Mark

Metal founding

Process

Shaping liquid metal against a forming surface

164 11, 164112, 164 761, B22D 1900

Patent

active

052516830

ABSTRACT:
A method is disclosed for making an article, such as a cylinder head, having one or more hollow ceramic tubes, such as ceramic exhaust port liners, cast in-situ therein with reduced cracking or breakage of the ceramic tube from tensile and compressive stresses exerted on the ceramic tube during the casting process. The method involves forming a removable core in the ceramic tube of a core material having a thermal expansion coefficient not exceeding about 10 times that of the ceramic tube to minimize crack-causing differential thermal expansion-induced tensile stresses on the ceramic tube when molten metal is cast therearound, casting the molten metal about the cored ceramic tube in a mold cavity, stress relieving the cast article at an elevated temperature before the cast article cools to a lower temperature at which crack-causing differential thermal contraction-induced compressive stresses are exerted on the cast in-situ ceramic tube, and removing the core from the cast article.

REFERENCES:
patent: 3173451 (1965-03-01), Slayter
patent: 3568723 (1971-03-01), Sowards
patent: 3825055 (1974-07-01), Mino et al.
patent: 3919755 (1975-11-01), Kaneko et al.
patent: 4003422 (1977-01-01), Schramm et al.
patent: 4148352 (1979-04-01), Sensui et al.
patent: 4346556 (1982-08-01), Rice et al.
patent: 4637110 (1987-01-01), Yamagata
patent: 4828009 (1989-05-01), Taniguchi
patent: 4840219 (1989-06-01), Foreman
patent: 4849266 (1989-07-01), Dwivedi
patent: 4938802 (1990-07-01), Noll
patent: 4997024 (1991-03-01), Cole
patent: 5012853 (1991-05-01), Bihlmaier

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