| 摘要 |
PROBLEM TO BE SOLVED: To obtain a control device for an injection molding apparatus, which can stabilize a resin filling in injection pressure hold even in an injection molding apparatus in which the functions descend by a screw without a back-flow prevention device or wear or the like of a back-flow prevention valve, etc. though the back-flow prevention device is provided, and further even in molding materials of any viscosity, and to obtain a controller which can inject stably the weighted resin without any back-flow or excessive injection. SOLUTION: It is determined whether an injection starts or not, the injection start is waited. In the case of the injection start, it transfers to a step SA2 (SA1). A load torque command value D<SB>CMD</SB>is read, a load torque return value D<SB>FB</SB>is detected, and a rotation speed command value V of a screw is calculated (SA2-SA4). The screw is rotation-controlled according to the rotation speed command value V, and it is determined whether pressure hold finished or not. If the pressure hold is not finished, it returns to the step SA2 to continue the treatment, and if the pressure hold is finished, the measurement and a getting-out treatment of a molding article are carried out to finish one cycle (SA5-SA7). COPYRIGHT: (C)2010,JPO&INPIT |
