| 摘要 |
An electronic timing control system for glassware and other thermoplastic articles forming machines of the kind having a plurality of unitary forming sections and a single molten glass gob feeding and distribution means, each forming section comprising glass gob guiding channels, a blank forming station, a blow molding station and/or a take out station, and finished ware take out means, comprises a preprogrammed controller capable of sequentially controlling all the ware forming operations, a constant frequency pulse generator to operate as a real time clock to measure the timing and duration of each operation sequentially controlled by said controller, a glass gob release sensor to detect the instant when a glass gob is cut and released from said glass gob feeding and distribution means and feed back a signal to said controller to indicate the end of a prior cycle and the initiation of a new cycle of operations, a temperature sensor to detect the passage of a glass gob from said guiding channels into said blank forming station and feed back a signal to said controller to trigger the operation of the parison forming means, and a pressure sensor to detect the instant when said parison forming means commence to work on a glass gob and feed back a signal in accordacne with the pressure to said controller to initiate the time count and to thereby secure an accurate duration of the parison forming operation, said controller also having mode of operation selector switches to enable selection of manual operation of the different main mechanisms of the machine without the need of inhibiting the remaining mechanisms, unloaded test operation of the machine to sequentially work the mechanisms without a load of glass, and fully automatic operation with a load of glass, and a variable frequency oscillator to simulate the signal of the gob release sensor, whereby when the unloaded test operation is selected, the simulated time signals are given by said oscillator and by the operator, whereas when automatic operation is selected, the real time signals are back fed to the controller by said sensors.
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