Patent ID: 11911944
Assignee: SODICK CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An injection device, comprising:
an injection cylinder which accumulates a molding material and has an injection nozzle at the front;
an injection plunger which is moved backward in the injection cylinder;
an injection plunger driving device which moves the injection plunger backward; an injection controller; a position detection device which detects a position of the injection plunger; and
a pressure detection device for detecting a resin pressure of the molding material in the injection cylinder, wherein
the injection controller is configured to calculate a retreat speed of the injection plunger in a plastication metering step of an n-th injection cycle from a metering time of the injection plunger measured by the position detection device in a plastication metering step of an (n-1)-th injection cycle, and the injection controller is configured to directly control the injection plunger to retreat based on a value of the resin pressure and the retreat speed to perform metering, before a suck-back step can be omitted, wherein the n is an integer of 3 or more.