【正文】 clinder temperature. Some resin material may deposes so it set screw speed in midspeed such as 4575%, In plastic step setting screw back pressure is very important, Higher screw back pressure ,higher quality of product screw back pressure make resin structure order, Molding product is beautiful and volume stable. But ,it maybe flow if screw back pressure too high . So all factors should be considered when using screw back pressure. The way of knocking out includes knocking out once, Knocking out repeat and ejector delay. Take product by manipulator or take product easy, it should select knocking out once. To longer the work time of ejector oiljar, times of knocking out lower 3 times. Ejector delay used when product will be damaged if ejector back or suit manipulator. In PCE pany, for using manipulator in abundence , knocking out time suits manipulator, Knocking out delay keeps second when using manipulator fullmanipulator, knocking out delay keeps about 5 second when using manipulator semimanipulator and product will fall or can’t be taken off if ejector back. Back Holding pressure step: No matter what product there is a holding pressure step. Any product can’t molding a same thickness. Usually the deeper section may sink mark . To prevent this defect it should set holding pressure, The injection speed of holding pressure step is slow but holding pressure setting within 2580% depending on sink mark. 原料 Lowpressure section: Mold closing sets lowpressure when plates meeting. This position is set to the data of machine screen on this time. This point is the gage of the data. Data lower the point there is no highpressure. Data higher the point there is highpressure easily. It set speed within 1525% and pressure within 12% depending on type within 12% depending on type of injection molding machine. Sorts of molding parameter. Cushion Screw back pressure Clamping force Opening speed Ejector advance position Mold temperature Cool time Knocking out and delay time 開鎖模條件: 1鎖模一般分:快速→中速→低壓→高壓 PPS, PA, cool very soon , Nozzle temperature should higher more than the second cylinder temperature. Injection is a step which inject melt resin material into mold. It consists of stepl,step2 ,step3,step4 and holding pressure step: Vi:理論注射容積。