| 摘要 |
PROBLEM TO BE SOLVED: To enable setting a uniform suck back amount simply and in an optimum value for each molding cycle. SOLUTION: A screw is made to retreat (a1-a4) after finishing a metering step. A retreating amount for bringing a resin pressure inside a cylinder to a predetermined value or lower is found. The value of screw retreating amount is displayed on screen in a display unit. The screw retreating amount displayed is set up as a suck back amount (a7-a11). Alternatively, the suck back amount is set automatically. After setting up the suck back amount, a suck back procedure is controlled with the suck back amount (a14-a18) thus set up. The suck back amount is set up simply and in optimum value because the screw retreating amount for bringing the resin pressure to the predetermined value or lower is set up as the suck back amount, and thereafter a steady control is possible since the suck back procedure is controlled with the fixed suck back amount. COPYRIGHT: (C)2009,JPO&INPIT
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