Glass manufacturing – Control responsive to condition sensing means
Patent
1992-07-31
1995-06-20
Jones, W. Gary
Glass manufacturing
Control responsive to condition sensing means
65260, 65163, 65239, 65241, 65DIG13, C03B 3504, C03B 944
Patent
active
054257948
ABSTRACT:
A machine for forming glass containers from discrete gobs of molten glass comprising a mechanism displaceable between retracted and advanced position. A pneumatic actuator having upper and lower chambers controlled by a servo pneumatic valve controller, controls the displacement of the pneumatic actuator. A position lead based upon the actual position of the mechanism is calculated and differenced with a position demand to define a position delta. A position lag is calculated based on the position delta. The pressures within the upper and lower chambers are sensed and based thereon a force representative of the force being applied to the piston is calculated and differenced with the position lag to define a force error and a lag force is calculated based on the force error. The servo pneumatic valve controller is driven with the lag force.
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Frederick Dean K.
Lehman Joseph L.
Pettingell James R.
Emhart Glass Machinery Investments Inc.
Griffin Steven P.
Jones W. Gary
Smith Spencer T.
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