KEEPING OF MOLD-CLAMPING FORCE FOR INJECTION MOLDING MACHINE AND REGULATING AND KEEPING MOLD CLAMPING FORCE

摘要

PURPOSE:To enable the keeping of mold-clamping force and the regulation of mold-clamping position to be achieved with a little electric power by carrying out position keeping and position regulating corresponding to set value in which a movable platen is preliminarily set. CONSTITUTION:The distance between a stationary platen 25 and a movable platen 19 is increased wider than the thickness of a mold by a driving motor 21. The mold is opened by contracting a toggle mechanism 18. Next, the extension of the toggle mechanism 18 is started, and when the output of a platen position detector 29 becomes equal to the output value of the operator 33 operating the output of a mold-clamping force setting means 35, the position of a movable platen 19 is kept at the set value of the mold closing force setting means 35. A mold clamping device having held the movable platen 19 is advanced by the motor 21, and when a movable mold 26 is brought in contact with a stationary mold 27, said mold clamping device is stopped. Thus, the regulation of mold clamping force is finished. When the mold is clamped, the position of the movable platen 19 is kept at the set value of the mold-clamping position setting means 36 with necessary minimum electric power by the signal obtained by comparing the set value of the mold-clamping position setting means 36 with the signal of the position detector 29 passing through the interface 30 of the position detector.