Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1980-06-06
1982-05-18
Baldwin, Robert D.
Metal founding
Process
With measuring, testing, inspecting, or condition determination
164155, 164113, 164315, B22D 1732
Patent
active
043300260
ABSTRACT:
A method and apparatus for controlling an injection process in cold-chamber die-casting machines which work on a three-phase system whereby an automatic initiation of the third phase without delay is possible. Beginning with the plunger of the apparatus in a certain starting position, the time is measured which elapses until a pressure in a working cylinder ahead of the plunger has reached a predetermined value. The time delay of the valve system which releases the pressure medium feed in the third phase is subtracted from the time measured so as to arrive at a time differential. At the end of the time differential, which elapses when the injection process begins with the plunger in its original or starting position, serves as a starting signal to trigger the valve system.
REFERENCES:
patent: 4019561 (1977-04-01), Aoki
Baldwin Robert D.
Lin K. Y.
Oskar Frach Werkzeugbau GmbH & Co. KG
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