Self-cleaning ejector-filter

Details Self-cleaning ejector-filter Self-cleaning ejector-filter

1977-04-14

1978-09-12

Cuchlinski, Jr., William A.

Metal founding

Means to shape a forming surface

Including means for separating forming surface from shaping...

55385R, 55525, 210251, 210391, 210494R, B22C 1700

Patent

active

041130006

ABSTRACT:
A combination device permitting filtering of an air-sand mixture or an air-metal liquid mixture at the moment of filling a foundry mold, as well as ejection of the molded part, wherein a filtering element, composed of a spiral spring with spaces between its turns, is mounted and centered in the mold. This filtering element centers and guides an ejector, driven by an ejection striker plate. In the process of ejection, the elongation of the spring widens the spaces between its turns, thus freeing bits of sand or metal caught between the turns, to provide self-cleaning. The device can be used in foundries to make mold cores and to mold light-alloy parts by gravity or low pressure in metal molds.

REFERENCES:
patent: 640126 (1899-12-01), Giles
patent: 1175740 (1916-03-01), Ford
patent: 1317710 (1919-10-01), Koch
patent: 1820533 (1931-08-01), Foley
patent: 2083148 (1937-06-01), Coulombe
patent: 2482321 (1949-09-01), Copeland et al.
patent: 2482330 (1949-09-01), Dudzinski

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