| 摘要 |
PROBLEM TO BE SOLVED: To provide a suck-back control method which is not affected by a detection error of a pressure sensor in an injection molding machine. SOLUTION: A suck-back starting position is stored (step A1). Simultaneously when suck-back is started, an indicator of the completion of decompression is turned off (step A2). The inclination of pressure is detected. The inclination of pressure is obtained byΔpressure/Δscrew position (step A3). It is determined whether an absolute value of the inclination of pressure obtained in the step A3 is smaller than a prescribed standard value or not (step A4). When the absolute value of the inclination pressure is determined not to exceed the standard value in the step A4, the indicator of the completion of decompression is turned off (step A5). A position of the screw when decompression is completed is stored as a decompression completion position (step A6). The amount of the movement of the screw from the suck-back starting position to the decompression completion position is displayed on a scope (step A7) to finish a process. COPYRIGHT: (C)2009,JPO&INPIT
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