| 摘要 |
PURPOSE:To obtain a molded form, excellent in appearance, dimensional accuracy and strength, by a method wherein the titled molder is provided with a cavity capacity regulating means, a pressure detecting means and a control means while the molder is controlled so that an objective resin pressure coincides with a detected resin pressure. CONSTITUTION:When mold closing is finished, an actuator 7 for injection is controlled by a command from a controller 12, a piston 6 is driven leftward and plastic is poured from an injection cylinder 5 into a first cavity 4. When the plastic is poured, the controller 12 outputs a driving signal to a cavity capacity regulating device 11 and outputs a speed control signal to an injection actuator 7. When the cavity capacity regulating device 11 receives the driving signal, the device moves a piston 10 leftward while the injection actuator 7 reduces the speed of the piston 6 gradually. The objective value of resin pressure is being inputted in the controller 12 and the controller 12 controls the cavity capacity regulating device 11 so that the objective value coincides with the detected resin pressure.
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