Izvi zvinotevera misimboti yakakosha yekuchengeta mupfungwa nezve extrusion.Vanofanira kubatsira kuchengetedza mari, kuburitsa zvigadzirwa zvemhando yepamusoro, uye kushandisa michina nemazvo.
7. Mari yemagetsi haina kukosha.
Kunyangwe kufarirwa kwakakurumbira uye matambudziko chaiwo padanho rechirimwa nekukwira kwemitengo yemagetsi, simba rinodiwa kuti umhanye extruder richiri chikamu chidiki kwazvo chemutengo wakakwana wekugadzira.Izvi zvichagara zvakadaro nekuti mutengo wezvinhu wakakwira zvakanyanya, extruder isystem inoshanda, uye kana simba rakawandisa rikaunzwa ipurasitiki ichakurumidza kupisa zvakanyanya kuti igadzirise nemazvo.
8. Kudzvanya pa screw tip kwakakosha.
Kudzvinyirirwa uku kunoratidza kuramba kwezvese kuzasi kwescrew: zvikirini uye kusvibiswa, breaker plate, adapta, kutamisa machubhu, static mixers (kana ikashandiswa), uye iyo inofa pachayo.Izvo zvinoenderana kwete chete nejometri yezvikamu izvi, asiwo pane tembiricha muhurongwa, izvo zvinozokanganisa resin viscosity uye chiyero chekubuda.Izvo hazvibvi pane screw dhizaini, kunze kwekunge ichikanganisa tembiricha, viscosity, uye throughput.
Kuyera kudzvanywa kwakakosha nekuda kwezvikonzero zvekuchengetedza - kana ikakwira zvakanyanya, musoro uye kufa zvinogona kuputika nekukuvadza kana kukuvadza vanhu kana michina iri pedyo.
Kudzvanya kwakanakira kusanganisa, kunyanya munzvimbo yekupedzisira (metering) mune imwe -screw system.Nekudaro, kudzvanywa kwepamusoro kunorevawo kuti simba rakawanda rinotorwa kuburikidza nemota-saka yakanyanya kunyungudika tembiricha-iyo inogona kuraira muganho wekumanikidza.Mumapatya screws, kupindirana kweaya maviri screws musanganiswa unoshanda zvakanyanya, saka kudzvanywa hakudiwe nekuda kweichi chinangwa.
Mukugadzira zvinhu zvisina mhango, senge pombi ine dandemutande rinoshandisa maoko kubata pakati pepakati panzvimbo, kudzvanywa kwepamusoro kunofanirwa kugadzirwa mufa kuti ibatsire hova dzakatsemuka kubatana zvakare.Zvikasadaro, chigadzirwa chinogona kuve chisina kusimba pamwe neaya weldlines uye chinogona kutadza kushanda.
9. Output = displacement yekubhururuka kwekupedzisira, +/ - pressure flow and leakage.
Kutamiswa kwendege yekupedzisira kunonzi kudhonza kuyerera, uye kunoenderana chete nescrew geometry, screw speed, uye melt density.Iyo inogadziriswa nekuyerera kwemhepo, iyo inonyatso sanganisira mhedzisiro yekupikisa (inoratidzirwa nemusoro kudzvanywa) kudzikisa kuburitsa, uye mhedzisiro yechero overbite mukudya kuti iwedzere kubuda.Kudonha pamusoro pendege kunogonawo kuve kune chero nzira.
Zvinobatsirawo kuverenga zvinobuda pa rpm, sezvo izvi zvichiratidza kuparara kwesimba rekupomba kwescrew nenguva.Imwe chiverengero chine hukama ndeyekubuda pa hp kana kW yesimba rinoshandiswa.Uku ndiko kugona uye kunogonesa fungidziro yesimba rekugadzira remota yakapihwa uye dhiraivha.
10. Shear rate inoita basa rinokosha muviscosity.
Yese mapurasitiki akajairika ari shear -kuonda, izvo zvinoreva kuti viscosity inodzika sezvo epurasitiki inofamba nekukurumidza uye nekukurumidza.Mamwe mapurasitiki anoratidza izvi zvinoshamisa.Mamwe maPVC, semuenzaniso, anoyerera kagumi kana kupfuura nekukurumidza nekungopeta kaviri kwekusundidzira.LLDPE, nekusiyana, haigeri -kutetepa zvakanyanya, uye kupeta kaviri kwesimba rekusundira kunowedzera kuyerera kwayo katatu kana kana.Iyo yakaderedzwa shear -kuonda mhedzisiro inoreva yakakwirira viscosity pa extrusion mamiriro, izvo zvinoreva kuti rakawanda simba remota rinodiwa.Izvi zvinotsanangura chikonzero nei LLDPE ichimhanya kupfuura LDPE.
Kuyerera kunoratidzwa maererano neshear rate, iri kutenderedza zana sec -1 mu screw channels, pakati pe 100 ne 1000 sec-1 mumiromo yakawanda inofa, uye yakawanda kupfuura1000 sec -1 mukubhururuka kuenda kumadziro uye zvimwe. madiki anofa maburi.Melt index chiyero chakajairwa che viscosity asi chinotenderedzwa (kureva, kuyerera/kusundidzira pachinzvimbo chekusundira/kuyerera).Nehurombo, inoyerwa pamashear mitengo yegumi sec -1 kana zvishoma uye inogona kunge isiri chiyero chechokwadi mune extruder uko kunyungudika kuri kuyerera nekukurumidza.
11. Motokari inopikisa bhomba, bhomba rinopikisa motokari.
Ndakatanga ne 10 misimboti yakakosha yeextrusion, asi iyi yaive yakakosha zvekuti ndaifanira kuisanganisira, futi.Mutemo wegumi nerimwe ndosaka kudzora mbiya kusingashande sezvaunoda kana kutarisirwa, kunyanya munzvimbo yemamita.Kana dhiramu rikapiswa, iyo layer yemidziyo pamadziro yedhiramu inova shoma uye mota inoda simba shoma kuti ishandure mune iyi yakawedzera mafuta.Motor current (amps) inodzika.Sezvineiwo, kana dhiramu ratonhodzwa, kunyunguduka pamadziro emadziro kunowedzera viscous, mota inofanirwa kushanda zvakanyanya, amps inokwira, uye imwe yekupisa inobviswa kuburikidza nedhiramu inodzoserwa zvakare nemota.Kazhinji, vanodzora mbiya vane mhedzisiro pakunyungudika kunodiwa, asi hapana kwakawanda sehuwandu hwekuchinja nzvimbo.Zviri nani kuyera tembiricha yekunyungudika kuti unyatsonzwisisa zviri kuitika.
Nguva yekutumira: May-27-2017