资源描述：
《注塑机及其的控制 外文翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、InjectionmoldingmachineandonthecontrolofitModernplasticinjectionmoldingmachineisasetofmechanical,electricalandfluidinonetypicalsystem,asthisdevicehasformingcomplexproducts,lesspost-processing,processingcharacteristicsoftheplasticvariety,sinceitsincep
2、tionhasgrownrapidly,thecurrentfullOver80%oftheworld'sproductsareusedplasticinjectionmoldingmachineforprocessing.Conventionalinjectionmoldingmachinesgenerallyuseasimpleopen-loopcontrol,thatis,inaccordancewithapre-setvalueofcontrol.Inthedevicemanufactu
3、ringprocess,pre-configuredparametervalues,suchastheclampingforce,cycletime,temperature,etc.,fromthemachineintheproductionprocessbemaintained.Forexample,bycontrollingthedietemperaturecanbemaintainedthetemperatureofheatingfluid,plastictemperaturecanbeo
4、utsidetheheatingdevicebycontrollingthepowertomaintain.Thiscontrolmethodofsimplestructure,however,pooranti-interferenceabilitytocontrolthetemperatureisrelativelylow.Atpresent,moreinjectionmoldingmachineusesaclosed-loopcontrol,thatis,accordingtoon-line
5、measurementvalueandsetthevalueofthedeviationcontrol.Closed-loopcontrolsystemusesanegativefeedbackloop,anti-jammingability,whentheinjectionspeed,injectionpressure,moldcavitytemperature,cavitypressure,melttemperatureandoilpressureduetointerferenceinthe
6、productionprocess,deviationofthemachinethroughtheadaptivecontrolsystemforautomaticcorrectionofinterference.Thiscontrolmethodofanti-interferenceability,highcontrolaccuracy.Moreadvancedcontrolmethodistoapplycomputercontrolled,thatis,tobuildaclosed-loop
7、real-timecomputercontrolsystem.Itincludesdirectdigitalcontrolsystem(DDC),supervisorycomputercontrolsystem(SCC),distributedcontrolsystem(DCS)andmulti-levelcontrolofseveraltypes.Commonlyusedinjectionmoldingmachinecontrolsystemhasthreekinds,namely,thetr
8、aditionalrelay-based,programmablecontrollersandcomputer-basedcontroltype.Inrecentyears,programmablelogiccontroller(referredtoasPLC)withitshighreliability,high-performancecharacteristicsininjectionmoldingmachinecontrolsystemhasbeenwidelyused.Inorderto
