B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/697
B29C 45/77 (2006.01)
Patent
CA 1257756
ABSTRACT OF THE DISCLOSURE The present invention provides a method for controlling back pressure in an electrically-operated injectionn apparatus, in which apparatus, rotation and forward movement of an injection plunger within an injection heating tube are carried out by an electric motor as a driving source, backward motion of the injection plunger during the charging of material is converted into rotational motion, and a rotating force thereof is controlled to control back pressure of the injection plunger, the method being characterized by using an electric motor as a back pressure control means for the injection plunger, electrically measuring a backward force of the injection plunger or molten material pressure within the injection heating tube as the back pressure, and driving and controlling the motor by feedback control so that the back pressure is in coincidence with a set value. ?
499861
Shimizu Miyuki
Yamazaki Yoshihiko
Gowling Lafleur Henderson Llp
Nissei Plastics Industrial Co. Ltd.
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