Size control of extrusion molded articles

Details Size control of extrusion molded articles Size control of extrusion molded articles

1982-07-08

1984-09-11

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 407, 425140, 425141, 425145, 425163, B29F 306

Patent

active

044709374

ABSTRACT:
In a screw-type cold feed extrusion molding apparatus is provided a size control device adapted to control the sizes of extrusion molded articles through detection of the load current of the motor for driving the feed screw and take-off conveyor of the extrusion molding apparatus at speeds which vary in such a manner as to enable a molding material to be fed smoothly from the inlet toward the extrusion die of the apparatus so that fluctuations which would otherwise be caused in the sizes of the extrusion molded articles due to the presence of a molding material stagnant in the inlet of the apparatus are precluded reliably.

REFERENCES:
patent: 2916792 (1959-12-01), Crook et al.
patent: 3148231 (1964-09-01), Spencer
patent: 3890078 (1975-06-01), Straumanis
patent: 3904338 (1975-09-01), Straumanis
patent: 3989779 (1976-11-01), Brunnhofer
patent: 4097566 (1978-06-01), Bertin et al.
patent: 4156913 (1979-05-01), Apicella, Jr.

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