压力传感器作用

过程优化及生产监控ProcessOptimizationandProductionMonitoring瑞士奇石乐仪器公司KistlerInstrumenteAGFundamentalsProcessSetupandProcessMonitoring/Mtz2大纲Outline注塑过程优化Injectionmoldingprocessoptimization注射过程Injectionprofile保压切换点Switchoverpoint保压时间/压力Holdingtime/pressure生产过程监控Productionmonitoring短射Shortshots凹痕Sinkmarks次品分离ScrapseparationFundamentalsProcessSetupandProcessMonitoring/Mtz3注塑过程优化OptimizationofInjectionProcess目标Goal:保持熔体流动前沿速度恒定Constantmeltfrontvelocityovertheflowpath模腔压力测量的优点:AdvantageswithCavityPressureMeasurements:可以检测到什么时候熔体到达不同截面，没有太多部分填充的必要Detectionwhenmeltfrontreachesdiiferentcrosssection–Notsomanypartialfillingsnecessary容易检测量的变化，没有计算的必要Easierdetectionofamounttochange–Nocalculationnecessary模腔压力CavityPressure时间Time注射阶段InjectionphaseFundamentalsProcessSetupandProcessMonitoring/Mtz4模腔压力时间传感器熔体前沿速度注射速度优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocityFundamentalsProcessSetupandProcessMonitoring/Mtz5模腔压力CavityPressure时间Time优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocity传感器Sensor熔体前沿速度Meltfrontvelocity注射速度InjectionvelocityFundamentalsProcessSetupandProcessMonitoring/Mtz6模腔压力时间优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocity传感器Sensor传感器Sensor熔体前沿速度Meltfrontvelocity注射速度InjectionvelocityFundamentalsProcessSetupandProcessMonitoring/Mtz7模腔压力时间优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocity传感器Sensor熔体前沿速度Meltfrontvelocity注射速度InjectionvelocityFundamentalsProcessSetupandProcessMonitoring/Mtz8模腔压力时间优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocity传感器Sensor熔体前沿速度Meltfrontvelocity注射速度InjectionvelocityFundamentalsProcessSetupandProcessMonitoring/Mtz9模腔压力时间优化注射速度，横截面变化时-保持熔体前沿速度不变OptimizationofInjectionVelocityChangeinCrossSection–ConstantVelocity传感器Sensor熔体前沿速度Meltfrontvelocity注射速度InjectionvelocityFundamentalsProcessSetupandProcessMonitoring/Mtz10注射速度优化总结OptimizationofInjectionVelocitySummary注射速度切换…太早太迟Switchingtheinjectionvelocity…tooearlytoolate第二注射速度….太低太高Secondvelocity….toolowtoohigh模腔压力CavityPressure时间Time时间Time时间Time时间Time模腔压力CavityPressure模腔压力CavityPressure模腔压力CavityPressureFundamentalsProcessSetupandProcessMonitoring/Mtz11优化保压切换OptimizationofSwitch-Over目标Goal:当型腔充满时，从注射阶段切换到保压阶段Switchoverfrominjectiontoholdingpressurewhencavityisvolumetricallyfilled模腔压力测量的优点:AdvantageswithCavityPressureMeasurements容易检测到熔体到达流程末端Easydetectionwhenmeltfrontreachesendoffill需要更少的部分填充Fewerpartialfillingsnecessary模腔压力时间注射到保压阶段InjectiontoholdphaseFundamentalsProcessSetupandProcessMonitoring/Mtz12优化切换点OptimizationofSwitch-Over模腔压力的优化可以用来优化切换时间，螺杆位移，液压或模腔压力的阈值Cavitypressureoptimizationcanbeusedtooptimizeswitchoverbytime,screwdisplacement,hydraulicpressureorathresholdofcavitypressure当从注射到保压切换时模腔压力曲线有一个扭折，此时进行优化切换点Optimalswitchoverwhencavitypressurehasakinkinthecurvewhentransitionfrominjectiontoholdoccurs模腔压力时间注射到保压阶段InjectiontoholdphaseFundamentalsProcessSetupandProcessMonitoring/Mtz13优化切换点OptimizationofSwitch-Over模腔压力时间切换太早Switchovertooearly优化太晚Switchovertoolate模腔压力时间型腔未充满进行切换Switchoveroccurswhencavityisnotvolumetricallyfilled型腔充满后进行切换SwitchoveroccursaftercavityisvolumetricallyfilledFundamentalsProcessSetupandProcessMonitoring/Mtz14优化切换点OptimizationofSwitch-Over基于螺杆位置切换太早Switchoverbasedonscrewpositiontooearlys=6mm切换后模腔压力下降Cavitypressuredropsafterswitch-overFundamentalsProcessSetupandProcessMonitoring/Mtz15基于螺杆位置切换OKSwitchoverbasedonscrewpositionOKs=4mm切换后压力平滑上升Smoothriseafterswitch-over优化切换点OptimizationofSwitch-OverFundamentalsProcessSetupandProcessMonitoring/Mtz16基于螺杆位置切换太晚Switchoverbasedonscrewpositiontoolates=3mm切换后尖峰Spikeafterswitch-over优化切换点OptimizationofSwitch-OverFundamentalsProcessSetupandProcessMonitoring/Mtz17优化保压时间OptimizationofHoldingTime目标Goal停止保压当浇口凝固后Shutoffholdingpressurewhengateissealed标准过程Standardprocedure增加保压时间直到重量不变Increaseofholdingtimeuntilweightisconstant模腔压力测量的优点AdvantageswithCavityPressureMeasurements:增加保压时间到模腔压力曲线不再下降Increaseofholdingtimeuntilnodropincavitypressurecurve简单快速EasierandfasterFundamentalsProcessSetupandProcessMonitoring/Mtz18保压时间太短Holdingtimetooshortt=1.5s撤掉保压后模腔压力下降Cavitypressuredropsaftershutoffofholdingpressure优化保压时间OptimizationofHoldingTimeFundamentalsProcessSetupandProcessMonitoring/Mtz19保压时间太短Holdingtimetooshortt=2.5s撤掉保压后模腔压力下降Cavitypressuredropsaftershutoffofholdingpressure优化保压时间OptimizationofHoldingTimeFundamentalsProcessSetupandProcessMonitoring/Mtz20保压时间太短Holdingtimetooshortt=3.2s撤掉保压后模腔压力下降Cavitypressuredropsaftershutoffofholdingpressure优化保压时间OptimizationofHoldingTimeFundamentalsProcessSetupandProcessMonitoring/Mtz21保压时间OKHoldingtimeOKt=3.45s撤掉保压后模腔压力平滑下降NodropinCavitypressuredropsaftershutoffofholdingpressure优化保压时间OptimizationofHoldingTimeFundamentalsProcessSetupandProcessMonitoring/Mtz22保压时间太长Holdingtimetoolongt=4s较短保压时间而言，曲线无变化Nochangeincurvecomparedtoshorterholdingtime优化保压时间OptimizationofHoldingTimeFundamentalsProcessSetupandProcessMonitoring/Mtz23优化保压压力Optimizat