| 摘要 |
PURPOSE:To obtain the optimum kneading condition of molding material by a method wherein the control of measuring and kneading is effected by a numerical control unit so that arbitrary rotation and back pressure of a screw can be obtained in accordance with the detected position of the screw. CONSTITUTION:A screw shaft 3 is rotated by a servomotor M2 and is moved by the servomotor M1 into axial direction to effect injection. A reversible counter 16 counts a pulse from an encoder P1 provided on the servomotor M1 and detects the position of the screw 1. A CPU 11 reads the position of the screw 1 from the reversible counter 16 and reads also screw rotating speed command values V2......Vn, corresponding to switching points upon the switching points L2...Ln and torque limit values T2...Tn from an unvolatile memory 14 in order to output the read values and control the servomotors M1, M2. When the value of the reversible counter 16 has arrived at the finishing point LE of the kneading and the measuring, the servomotor M2 is stopped to stop the rotation of the screw 1 whereby the measuring and kneading are finished.
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