Methods for controlling injection molding machines

Details Methods for controlling injection molding machines Methods for controlling injection molding machines

1987-04-30

1988-10-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

2643281, B29C 4576

Patent

active

047802561

ABSTRACT:
An injection molding machine generally comprises a heating cylinder, a screw rotated and reciprocated in the heating cylinder and a screw drive system. The screw drive system comprises two motors and two sensors connected respectively thereto which are automatically controlled by a control system in connection with a screw revolution number and a screw back pressure, or independently so as to accurately carry out the resin measuring process. The control system performs an adaptive control of a motion control system inclusive of the screw and the screw drive system in response to a screw speed instruction, a screw revolution number feedback signal, and a screw position feedback signal in accordance with various control modes.

REFERENCES:
patent: 4146601 (1979-03-01), Bishop

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