Method of controlling mold pressure pin for press casting machin

Details Method of controlling mold pressure pin for press casting machin Method of controlling mold pressure pin for press casting machin

1991-09-03

1992-11-10

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164 41, B22D 2711

Patent

active

051615983

ABSTRACT:
In a press casting machine a molten material enclosed in a cavity of a mold is squeezed by a pressure pin, the pressure pin is controlled by automatically controlling the start timing thereof. Namely, an optimum stroke of the pressure pin is preliminarily set and an actual stroke thereof is detected. The detected stroke of the pressure pin is compared with the optimum stroke thereof and a start timing of the pressure pin is corrected or modified so that the stroke thereof is made optimum. When the detected stroke of the pressure pin is smaller than the set stroke thereof, the start timing of the pressure pin is corrected so that a timing for starting the pressure pin advances and, on the contrary, when the detected stroke of the pressure pin is larger than the set stroke thereof, the start timing of the pressure pin is corrected so that a timing for starting the pressure pin is delayed.

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