Weight regulator for a controllable injection moulding machine

Details Weight regulator for a controllable injection moulding machine Weight regulator for a controllable injection moulding machine

1986-10-27

1988-07-05

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

264 404, 425145, 425169, B29C 4577

Patent

active

047551224

ABSTRACT:
The weight regulator for an injection moulding machine (1) to be controlled by a process regulator (13) comprises a circuit arrangement (15) for determining a final pressure adjustment value from the predetermined nominal weight of the injection-moulded parts to be manufactured by the injection moulding machine (1), a subtraction device (16), which forms the difference between the nominal weight and the actual weight of the injection-moulded parts produced by the injection moulding machine (1) delivered by an analytic balance (12), an integrator (17) for producing a correction value from the difference between the actual weight and the nominal weight an an adder (18) which is connected between the circuit arrangement (15) and the process regulator (13) and which adds the correction value to the final pressure adjustment value so that a nominal value of the final pressure is obtained that can be supplied to the process regulator (13).

REFERENCES:
patent: 2675583 (1954-04-01), Scherry
patent: 3910737 (1975-10-01), Schmida et al.
patent: 4142847 (1979-03-01), Ripani
patent: 4452579 (1984-06-01), Janson
"Prozessautomatisierung Beim Extrudieren und Spritzgiessen von Kunststoffen", Dr. Ing. H. G. Wiegand, Carl-Hansen-Verlag Munchen-wien 1979, pp. 179-185.

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