Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Patent
1978-10-04
1980-12-02
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
264 407, 264148, 264176R, B29F 308
Patent
active
042370825
ABSTRACT:
The rate of extrusion of an elongated article from a dynamic extruder is measured and a measurement signal representative thereof is established. The measurement signal is then compared with a setpoint signal representing the desired extrusion rate to produce a control signal which is responsive to the difference between the measurement signal and the setpoint signal. The rate of introduction of polymer particles into the plasticization section of the extruder is automatically manipulated responsive to the control signal to maintain the extrusion rate at least substantially constant at the desired rate. The control signal can be adjusted to take into account variations in the temperature of the molten polymer entering the long land cooling die of the extruder.
REFERENCES:
patent: 2566854 (1951-09-01), Rhodes
patent: 2649618 (1953-08-01), rhodes et al.
patent: 2916792 (1959-12-01), Crook et al.
patent: 3119148 (1964-01-01), Chambers et al.
patent: 3286302 (1966-11-01), Doering
patent: 3393427 (1968-07-01), Larsen
patent: 3483597 (1969-12-01), Windeler et al.
patent: 3698844 (1972-10-01), Grimm
patent: 3699197 (1972-10-01), Egger
patent: 3907961 (1975-09-01), Carrow
patent: 3993421 (1976-11-01), Adair
Giles Richard F.
LaSpisa Ronald J.
Phillips Petroleum Company
Thurlow Jeffery R.
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