Dispensing – Automatic control – Temperature responsive or soluble controller
Patent
1984-09-21
1987-05-26
Lowe, James
Dispensing
Automatic control
Temperature responsive or soluble controller
222 55, 222 63, 2221461, 264 401, 425135, 425144, B29C 4782, B29C 4792
Patent
active
046678522
ABSTRACT:
Apparatus for preparing and dispensing thermoplastic resin has a conveyor or extruder with a chamber provided with heating elements, a conveyor or extruder screw mounted in the chamber and connected to a drive motor, a resin inlet and a resin outlet. To ensure the intended continuous dispensing of the resin even during intermittent operation, a control device is provided having inputs connected to a resin pressure sensor, a conveyor speed of rotation sensor and a resin temperature sensor. Intended values for the conveyor speed, resin pressure and resin temperature are supplied to the control device, which regulates the pressure during interruption of the dispensing of the resin and effects a speed regulation or a pressure regulation with a superimposed speed regulation during dispensing of the resin. For plasticizing of the resin, which is supplied in solid, preferably granular form, and since the conveyor geometry by the heating elements is required. The temperature at the outlet is monitored by the temperature sensor and regulated by the control device.
REFERENCES:
patent: 3028833 (1962-04-01), Hummel
patent: 4088430 (1978-05-01), Giles
patent: 4102958 (1978-07-01), Wertz
patent: 4146601 (1979-03-01), Bishop
patent: 4178337 (1979-12-01), Hall et al.
patent: 4395217 (1983-07-01), Benad/i/ 425382 R
Gerhard Schenkel, Plastics Extrusion Technology and Theory, 1966, pp. 203-205.
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