Pig-charging apparatus for a hot-chamber pressure-diecasting mac

Details Pig-charging apparatus for a hot-chamber pressure-diecasting mac Pig-charging apparatus for a hot-chamber pressure-diecasting mac

1982-09-28

1984-06-26

Rutledge, L. Dewayne

Metallurgical apparatus

With control means responsive to sensed condition

With means responsive to condition of treated material

266 78, 266200, 266900, 432239, F27B 938

Patent

active

044562292

ABSTRACT:
An automatic pig-charging apparatus for hot-chamber pressure-diecasting machines is described, which enable small parts to be manufactured e.g., a Zamak alloy especially under mass production conditions. Excessive fluctuations of the level of the liquid metal melt have prove to have disadvantageous effects on the quality of small parts, and on the service lives of the pressure-diecasting machines and dies. The aim must accordingly be to minimize the fluctuations. The present invention provides a control system, which keeps the liquid metal level within narrow limits. A float switch automatically triggers a charging operation whenever the lower liquid metal level is reached. This operation involves the automatic replenishment of the liquid metal melt by addition of pigs supplied from a replenishing station.

REFERENCES:
patent: 1032306 (1912-07-01), Spencer
patent: 1138743 (1915-05-01), Froehlich
patent: 2224081 (1940-12-01), Jung
patent: 2245275 (1941-06-01), Jung et al.
patent: 2709529 (1955-05-01), Kleff, Jr. et al.
patent: 4067463 (1978-01-01), Larsen et al.
German Publication titled "Arbeitsgemeinschaft Giessereitechnik", Fachhochule Aalen.

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