Metal founding – Control means responsive to or actuated by means sensing or... – Control of feed material enroute to shaping area
Patent
1978-10-26
1981-02-24
Baldwin, Robert D.
Metal founding
Control means responsive to or actuated by means sensing or...
Control of feed material enroute to shaping area
164 4, 164312, 425145, B22D 1732
Patent
active
042521769
ABSTRACT:
In a casting machine using an injection ram, the ram movements are measured accurately and reliably in spite of adverse ambient conditions by a special sensing arrangement located inside the hydraulic drive cylinder which drives the ram. A sonic energy pulse is generated in a waveguide near the hydraulic piston. This pulse propagates along the waveguide to a transducer at the cylinder wall. The time required for this pulse propagation corresponds to the position of the piston and hence of the injection ram.
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Baldwin Robert D.
Hampilos Gus T.
NL Industries Inc.
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