Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1988-10-03
1990-08-07
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264109, 425 78, 425149, B22F 302
Patent
active
049466348
ABSTRACT:
A powder compacting press wherein one or more upper and one or more lower punches are respectively advanced toward each other in a die filled with an amount of powder to producing a pressed part in the shape of the die and punch configuration. The press including measuring device on the upper and lower punches to measure the peak forces applied to the upper and the lower punches and to generate a first signal proportional to the forces, calculating device for receiving the first signal and calculating the ratio of the forces of the upper and lower punches and transmitting a second signal that is proportional to the ratio, and adjusting device for receiving the second signal and adjusting the forces applied to each punch based upon the second signal to achieve a predetermined green density distribution in the pressed part whereby substantial uniformity in part dimensions is achieved.
REFERENCES:
patent: 3910737 (1975-10-01), Shimada et al.
patent: 4030868 (1977-06-01), Williams
patent: 4100598 (1978-07-01), Stiel et al.
patent: 4413967 (1983-11-01), Burry
Castle Donald R.
GTE Products Corporation
Heitbrink Jill L.
Quatrini L. Rita
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