Molding machine system, torque derivation system, torque derivation method and program

A torque derivation system deriving a torque of a screw configuring a molding machine, comprising:

• a feature-amount identification apparatus;
• a first-screw-torque acquisition apparatus;
• and
• a second-screw-torque derivation apparatus,
• wherein the molding machine includes:
• a cylinder;
• a first screw and a second screw embedded in the cylinder;
• and
• a motor rotationally driving the first screw and the second screw,
• the feature-amount identification apparatus identifies a feature amount related to an operation state of the molding machine,
• the first-screw-torque acquisition apparatus acquires a torque of the first screw detected by a torque detection device attached to a rotational shaft of the first screw, and
• the second-screw-torque derivation apparatus derives a torque of the second screw from the acquired torque of the motor and the acquired torque of the first screw.

A torque derivation method of deriving a torque of a screw configuring a molding machine, comprising:

• a feature-amount acquisition step;
• a first-screw-torque acquisition step;
• and
• a second-screw-torque derivation step,
• wherein the molding machine includes:
• a cylinder;
• a first screw and a second screw embedded in the cylinder;
• and a motor rotationally driving the first screw and the second screw,
• in the feature-amount acquisition step, processing of acquiring a feature amount, related to an operation state of the molding machine and identified by a feature-amount identification apparatus identifying the feature amount, is executed,
• in the first-screw-torque acquisition step, processing of acquiring a torque of the first screw, detected by a torque detection device attached to a rotational shaft of the first screw, is executed, and
• in the second-screw-torque derivation step, processing of deriving a torque of the second screw from the acquired feature amount and the acquired torque of the first screw is executed.

A program of deriving a torque of a screw configuring a molding machine,

• wherein the program causes a computer to execute:
• a feature-amount acquisition step;
• a first-screw-torque acquisition step;
• and
• a second-screw-torque derivation step,
• the molding machine includes:
• a cylinder;
• a first screw and a second screw embedded in the cylinder;
• and
• a motor rotationally driving the first screw and the second screw,
• the feature-amount acquisition step is a step of acquiring a feature amount related to an operation state of the molding machine and identified by a feature-amount identification apparatus identifying the feature amount,
• the first-screw-torque acquisition step is a step of acquiring a torque of the first screw detected by a torque detection device attached to a rotational shaft of the first screw, and
• the second-screw-torque derivation step is a step of deriving a torque of the second screw from the acquired feature amount and the acquired torque of the first screw.