Die casting apparatus for casting articles with an internally th

Details Die casting apparatus for casting articles with an internally th Die casting apparatus for casting articles with an internally th

1989-05-30

1990-09-25

Seidel, Richard K.

Metal founding

Means to shape metallic material

Including means to assemble mold parts

164132, 164345, 249 59, 249 63, 425438, 425577, B22D 1724

Patent

active

049586769

ABSTRACT:
A die casting apparatus for casting an article with an internally screw-threaded bore. The die casting apparatus includes a support, a die assembly coupled to the support, a core pin with external threads which are movable into and out of the die assembly, a lead screw for moving the core pin, a fixed bushing threadedly receiving the lead screw therein, a drive assembly, and a control assembly. The drive assembly has a hydraulic motor with an ouptut shaft that is axially arranged relative to the core pin for smoothly driving the core pin and lead screw. The external threads of the core pin and the external thread of the lead screw are identical for driving the core pin and the lead screw at the same rate to avoid damaging the newly formed internal threads of the cast article.

REFERENCES:
patent: 2579952 (1951-12-01), Morin
patent: 3388431 (1968-06-01), Aoki
patent: 3856255 (1974-12-01), Holzmann
patent: 3905416 (1975-09-01), Hammer
patent: 4079475 (1978-03-01), Thompson
patent: 4240498 (1980-12-01), Frenette
patent: 4280549 (1981-07-01), Gibbs
patent: 4554962 (1985-11-01), Wright
patent: 4633932 (1987-01-01), Ferguson

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