Patent ID: 7245986

Claim:
A control device for use in an injection molding machine for melting synthetic resin material and injecting a predetermined amount of molten synthetic resin material into a metal mold to obtain a molded product, comprising: a plurality of exchangeable control modules configured to be mutually connected by a bus line, each module in the plurality of exchangeable control modules having a dedicated microprocessor for each control element in the injection molding machine; a human/machine interface device configured to be connected to one of the plurality of control modules, the human/machine interface device having a general-purpose operating system configured to control a display section; and a driver section configured to be connected to one of the plurality of control modules, the driver section being configured to be controlled by a control module connected to the driver section, the driver section being configured to drive-control an actuator of the injection molding machine, wherein said plurality of control modules are configured to control the melting of the synthetic resin material in a barrel of the injection molding machine, to control an amount of the melted resin to be injected, or to control the injection of the measured amount of resin from an injection nozzle of the barrel, or to perform any combination of two or more thereof, wherein one of said plurality of control modules comprises a servo command section connected to the driver section, said driver section being configured to control a rotation of a measuring servomotor, the measuring servomotor being configured to drive an injection screw to inject a predetermined amount of the melted resin, the driver section being further configured to control an injection servomotor, the injection servomotor being configured to drive the injection screw to inject the melted resin through the injection nozzle.