| 摘要 |
PROBLEM TO BE SOLVED: To supply even a part such as an optical element required for relatively high precision with its stable quality. SOLUTION: An apparatus comprises an arithmetic unit 45 for storing the peak of injection pressure for proper molding, the time of peak generation, and a resin packing pressure when a mold is opened, a load cell 25 which detects the peak and inputs it in the unit 45, the first resin pressure sensor 67 which detects the injection pressure in the neighbourhood of a gate 66 communicating with a cavity 65, inputs it in the unit 45, and obtains the time of peak generation, the second resin pressure sensor 68 which detects a resin packing pressure in the cavity 65 and inputs it in the unit 45, a cylinder set temperature control device 41 for correcting the temperature of a plastication cylinder 12 so that in the neighbourhood of the time of peak generation which is stored in the unit 45, the peak of the injection pressure detected by the load cell 25 is equivalent to the pre-stored peak, and a heater pump 46 which controls the temperature of a mold 6 and corrects a cooling time so that a resin packing pressure during cooling is equal to the resin packing pressure stored in advance in the unit 45.
|
