Method of and apparatus for controlling resin plasticizing proce

Details Method of and apparatus for controlling resin plasticizing proce Method of and apparatus for controlling resin plasticizing proce

1979-10-02

1981-03-17

Coe, Philip R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

366 78, 425145, B29F 106

Patent

active

042566789

ABSTRACT:
In a method of and apparatus for controlling a plasticizing process of a resin of an in-line screw-type injection molding machine, a position of the screw is continuously detected in accordance with the movement thereof and a control function is determined by a back pressure of the screw which is compensated for by taking into consideration such as resin heating energy and shearing energy, which determine a temperature distribution of a resin to be injected. The operating condition, particularly the number of revolutions and the back pressure of the screw, is controlled on the basis of the screw position so as to make uniform the temperature distribution of the resin.

REFERENCES:
patent: 3797808 (1974-03-01), Ma et al.
patent: 3921963 (1975-11-01), Neff et al.
patent: 4146601 (1979-03-01), Bishop

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