资源描述:
《双螺杆挤出机工作原理(working principle of twin screw extruder)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、双螺杆挤出机工作原理(Workingprincipleoftwinscrewextruder)Extrusionmoldingisakindofprocessingmethodwhichhasthelargestvariety,themostchange,thehighproductivity,thestrongadaptability,thewideapplicationandthelargestproportionofoutputinthefieldofpolymerprocessing.Extrusionmoldingistomakethemelt(o
2、rviscousfluid)ofpolymermeltthroughtheextrusionoftheextruderscrewthroughacertainshapeofthemouthmold,theproductisacontinuousprofilewithaconstantcross-sectionshape.Theextrusionmoldingprocessofpolymermaterialssuitableforall.Almostallthermoplasticscanbeformed,andthermosettingplasticscan
3、alsobeused,butonlyafewthermosettingresinssuchasphenolics.Plasticextrusionproductsarepipes,plates,bars,sheets,films,monofilament,cablecoating,allkindsofprofiles,aswellasplasticandothermaterialssuchascomposite.Atpresent,about50%ofthethermoplasticplasticproductsbyextrusionmolding.Inad
4、dition,mixingtechnologyiscommonlyusedinplasticscoloring,mixing,plasticizing,granulationandmodificationofplastics,byextrusionmoldingasthefoundation,withblowinganddrawingtechnology,andforthedevelopmentofextrusionblowmoldingandextrusionmoldingandblowmoldingdrawingmanufacturingBOPPfilm
5、andotherproducts.Theextrusionmoldingisthemostimportantmethodinpolymermolding.Extrusionequipmentwithascrewextruderandaplungerextrudertwocategories,theformerforthecontinuousextrusion,theintermittentextrusionmoldingmaterialismainlyusedforhighviscosity,suchasPTFE,ultrahighmolecularweig
6、htpolyethylene.Canbedividedintosinglescrewextruderandmultiscrewextruderscrewextruder.Thesinglescrewextruderistheproductionofthemostbasicextruder.Forthefastestdevelopmentinrecentyearsinthetwin-screwextrudermultiscrewextruder,itsapplicationisextensive.Atpresent,intheprocessingofPVCpl
7、asticdoorandwindowprofiles,twin-screwextruderhasbecomethemainproductionequipment,singlescrewextruderwillbephasedout.Butintheextrusionprocessingofotherpolymers,isstilldominatedbysinglescrewextruder.Thetwohavetheirowncharacteristics:Singlescrewextruder:Thestructureissimpleandtheprice
8、islow.-suitableforpolymere