Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1978-04-14
1979-05-08
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
425119, 425129S, 425256, 425166, B29F 103
Patent
active
041534026
ABSTRACT:
An injection control apparatus for controlling the quantity of extrudable material dispensed by the screw of an extruder into a series of molds includes a code device attached to each mold or the mold carrier, the code device including magnets indicative of the volume of the mold cavity to be filled; sensors in the form of Hall effect switches for triggering by the magnets when in close proximity thereto and for generating a code signal which is fed to and stored in a controller; a rectilinear position transducer mechanically coupled to the screw of the extruder for sensing the position of the screw and producing a position signal; a logic circuit for receiving the code signal from the memory; potentiometers for receiving a signal from the logic circuit and feeding a reference signal via the logic circuit to a null point detector for comparison with the position signal from the transducer to produce a command signal, which controls dispensing of extrudable material by the screw, i.e., the shot size. By employing only one comparator for a plurality of different shot sizes, the cost of control is drastically reduced.
REFERENCES:
patent: 3328845 (1967-07-01), Ludwig
patent: 3425095 (1969-02-01), Kotek
patent: 3765809 (1973-10-01), Farrell
patent: 3884608 (1975-05-01), King
patent: 3924995 (1975-12-01), Crooks et al.
patent: 3941534 (1976-03-01), Hunker
patent: 4075301 (1978-02-01), Oswald
patent: 4120630 (1978-10-01), La Spisa et al.
Bata Shoe Company, Inc.
Flint, Jr. J. Howard
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