【正文】 填充百分比%標(biāo)準(zhǔn)偏差 (16 模)g料墊 (平均值和范圍)預(yù)塑時(shí)間 (平均值和范圍)螺桿停止位置(平均值和范圍)注射時(shí)間 (平均值和范圍)注射壓力峰值, P inj. max轉(zhuǎn)壓壓力, PN press.轉(zhuǎn)換位置 步驟 4 采用正確的螺桿轉(zhuǎn)速Select the correct, optimum screw speed for the material being processed (see notes, Section 5 ). Use this single speed for the whole plasticising strokeSet a back pressure of 5 to 10 bar (hydraulic).Readjust dosing stroke to achieve 9598% fillTake sixteeen consecutive mouldings and determine the standard deviation of the weights.Print out:Page 50 Process Statistics Why is it important to use the manufacturer’s remended screw speed?STEP FOUR RESULTSInsert actual values in the relevant boxesMean valueRangeminmaxWeight without holding pressureWeight with holding pressurePercentage fill%Standard deviation (16 shots)gMelt cushion (mean and range)Dosing time (mean and range)Screw stop position (mean and range)Injection time (mean and range)Peak injection pressure, P inj. maxInjection pressure at changeover, PN press.Changeover stroke STEP FIVEOptimise screw speed and backpressure profileUse the Dosing Profile page to slow down the screw rotation speed for the last 10% of the metering stroke.Readjust dosing stroke to achieve 9598% fillTake sixteeen consecutive mouldings and determine the standard deviation of the weights.Print out:Page 21 Dosing ProfilesPage 50 Process StatisticsWhat has happened to the Dosing Stop position?STEP FIVE RESULTSInsert actual values in the relevant boxesMean valueRangeminmaxWeight without holding pressureWeight with holding pressurePercentage fill%Standard deviation (16 shots)gMelt cushion (mean and range)Dosing time (mean and range)Screw stop position (mean and range)Injection time (mean and range)Peak injection pressure, P inj. maxInjection pressure at changeover, PN press.Changeover stroke STEP SIXOptimise depressionFind the depression speed which gives best screw stroke and melt cushion consistency. Set a depression stroke of 5mm.Check that you still achieve 9598% fill.Take sixteeen consecutive mouldings and determine the standard deviation of the weights.Print out:Page 21 Dosing ProfilesPage 50 Process Statistics