Method and apparatus for controlling injection compression molding

摘要

In a method of controlling an injection compression molding of the type wherein resin is injected into a mold cavity while the metal molds are separated away a little, and thereafter the metal molds are clamped together, a pulsating mold clamping pressure is applied to the metal molds during compression. The apparatus for controlling injection compression molding comprises a mold clamping pressure setter for outputting a mold clamping signal, a pulse waveform setter for generating a pulse signal, a signal calculating unit connected to receive the mold clamping signal and the pulse signal for outputting a mold clamping control signal, a mold clamping device, and a valve responsive to the mold clamping control signal for controlling a pressurized operating fluid supplied to the mold clamping device.