| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding machine in which screw reverse rotation control is possible to close a non-return valve of a screw certainly. SOLUTION: When injection start is carried out, an indicator of a non-return valve closure is switched off (A1), and screw reverse rotation is started (A2). Only as for a predetermined distance, screw advances from a screw position at the injection start time (A3). Torque is detected (A4). It is determined whether or not the torque is smaller than a reference value (A5). Closure determination of the non-return valve is made from the determination. Reverse rotation is finished when it is determined in A5 that the torque is smaller than the reference value (A6), and the amount of reverse rotation is displayed (A7). An indicator of the non-return valve closure is lighted (A8). It is determined whether the finishing of injection or not (A9). Injection end is carried out by YES. When it is determined in A5 that the torque is larger than the reference value, it goes to A9. When it is determined that the finishing of injection is not carried out by A9, it returns to A4. COPYRIGHT: (C)2009,JPO&INPIT
|
