| 摘要 |
PURPOSE:To obtain a molded article having the same accuracy as stamping molding, by injecting a molten resin in such a state that intermediate mold clamping force is allowed to act on a mold by a toggle type mold clamping device and the max. mold clamping force is subsequently allowed to actuate. CONSTITUTION:A mold clamping control apparatus has a setting device 60 for setting the intermediate mold clamping force of a toggle type mold clamping device and an operator 62 converts said intermediate mold clamping force into the intermediate stop position Co of a crosshead 36 to store said position C0 in a memory device 66. A comparator 66 compares this intermediate stop position Co0 with the actual position of the crosshead 36 detected by a position detector 54 and outputs a signal when both positions coincide to stop a crosshead driving electromotor 50 and, subsequently, a controller 68 again drives the electromotor 50 when a clamping increase order signal is inputted from an injection machine control apparatus 71. By this method, the intermediate mold clamping force is allowed to act on a mold at first and the crosshead is shopped on the way of a mold clamping stroke and a molten resin is injected in the cavity of the mold. After injection or on the way of injection, when the crosshead 36 is allowed to advance to allow the max. mold clamping force to act on the mold, the mold is compressed along with the molten resin to obtain a molded article. |
