B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
138/65.16
B30B 15/16 (2006.01) B29C 45/82 (2006.01)
Patent
CA 1171757
ABSTRACT OF THE DISCLOSURE The present invention relates to a control device for the hydraulic circulation in a plastics material injection moulding machine, with the delivery output of the variable delivery pump being adapted to the various requirements of the consumer apparatus during the working phases of a working cycle by means of a proportional valve system, the throughflow cross-section of such a valve system being adjustable by means of electrical input signals, whereby a return control or feedback line is provided which branches-off from the consumer or main supply line downstream of the proportional valve system and readjusts the delivery pump, and whereby the proportional valve system is provided in the regulating circuit with at least one position transducer, by means of which transducer an adjustment of the proportional valve system deviating from the desired value is effected to return to the predetermined desired value of the program.
402395
Hehl Karl
Macrae & Co.
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