Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Means responsive to abnormal condition completely stop...
Patent
1975-10-03
1976-12-21
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Means responsive to abnormal condition completely stop...
137804, 425152, B29F 114
Patent
active
039985741
ABSTRACT:
A system for controlling a molding machine utilized to mold food products on a stick. The system incorporates fluidic logic elements that are responsive to signals generated by the piston position in actuation cylinders so that the system control is dependent on the process condition, rather than on timing or other indirect process control methods. The fluidic logic elements command the actuating cylinders through air piloted valves, in a wholly pneumatic system. The control system is continuously recycled with minimal delay between cycles unless a failure of the system to produce a complete and dispensed produce is sensed. The dispensing of the product is positively determined by a fluidic sensor and a logic control circuit that determines that the product has dropped into and through a sensing airstream. If a malfunction is detected the machine shuts down and will not restart unless the start-stop control is cycled, so that the machine may be safely serviced. During normal machine operation, the machine will complete a cycle when "stop" is selected so that jamming (caused by a partially completed product) will not occur when it is restarted.
REFERENCES:
patent: 2317839 (1943-04-01), Westin
patent: 2959900 (1960-11-01), Wollett
patent: 3507212 (1970-04-01), Matteson
patent: 3677680 (1972-07-01), Etherington
patent: 3859015 (1975-01-01), O'Brien, Jr.
"Applications for Fluidics", Staff Report, Hydraulics & Pneumatics, June, 1969.
Higgins, Paul T., Fluidics Control High Speed Machinery, Bendix Electrical Components Div., Feb., 1968.
Husar Francis S.
Safran David S.
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