ELECTRONIC CONTROL SYSTEM IN A GLASSWARE FORMING MACHINE

摘要

An improved electronic control system in a glassware forming machine is disclosed. The machine has a plurality of individual glassware forming sections each having a plurality of glassware forming mechanisms. The machine also has means for feeding and sequentially distributing gobs of molten glass to each of the individual sections in an ordered sequence over one machine cycle consisting of a fixed number of clock pulses to form the gobs into glassware articles by cycling the forming mechanisms in a predetermined sequence of forming steps. Each individual section has an associated electronic control system responsive to each clock pulse for providing a load signal and a plurality of forming signals to actuate the forming mechanisms during the machine cycle. Finally, the machine has a circuit for providing a gob load signal in response to a load signal from any one of the control systems and means responsive to the absence of a gob load signal for deflecting a gob to prevent it from being distributed to an individual section. Each improved control system comprises means for providing an operation pulse each time the control system provides a plurality of forming signals to the forming mechanisms and means for providing a monitoring signal at a first binary state when a first one of the operation pulses is applied thereto and changing to the second binary state if no operation pulse occurs within a predetermined stall-period of time after the first operation pulse. Each improved control system also comprises means for enabling the load signal and the forming signals when the monitoring signal is at the first binary state and for inhibiting the load signal and the forming signals when said monitoring signal is at the second binary state so that the gobs of molten glass will not be distributed to the individual sections and the forming mechanisms will. return to a safe condition.