Process for manufacture of valve seat

Details Process for manufacture of valve seat Process for manufacture of valve seat

1978-12-21

1980-12-30

Husar, Francis S.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

249 57, 249126, 249119, 164350, B22D 11126

Patent

active

042414920

ABSTRACT:
The present invention concerns a method of manufacture of valve seats which comprises forming a series of vertically stacked molds each having at least one mold cavity with a configuration approximating that of a ring-shaped valve seat insert blank. After the molds are formed, they are stacked and the cavities are connected by a common molten metal passageway in such a way that the passageway connects with an axially facing outer surface of each mold cavity to provide a lap gating relationship. Molten metal is then poured into the lap gated passageway to form a series of valve seat insert blanks each having a gate formed on an axially outer face. The blanks are then removed from the molds. Various grinding operations are then applied to the blanks and the axially outer-facing surfaces of the blanks are ground to remove the gates to form valve seats for use in internal combustion engines.

REFERENCES:
patent: 1263271 (1918-04-01), Mossberg
patent: 1359196 (1920-11-01), Rau
patent: 2812571 (1957-11-01), Strom
patent: 3786857 (1974-01-01), Sutherland
patent: 4112997 (1978-09-01), Chandley

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