Extrusion imhando yepamusoro yekugadzira maitiro.Iyo plastiki zvinhu inonyungudutswa nekushandiswa kwekupisa uye extruded kuburikidza nekufa kuita chimiro chaunoda.Sirivha inotenderedza sikuruu inoiswa mukati medhiramu iyo inomanikidza kubuda mapurasitiki akanyunguduka kuburikidza nedhiresi.Iyo yakawedzera zvinhu inotora chimiro zvinoenderana neyakachinjika-chikamu chekufa.
Kushanda Nheyo
Mukuita uku, zvinhu zvepurasitiki zviri muchimiro chepellets kana granules giravhiti inodyiswa kubva kumusoro yakasungirirwa hopper kupinda mudhiramu.Zvinowedzerwa senge colorants uye ultraviolet inhibitors (mvura kana pellet fomu) inogona kusanganiswa muhopper.Iyo yepurasitiki zvinhu inopinda nepahuro yekudya uye inosangana neiyo inotenderera screw.Siruuru inotenderedza inosundira mabhero epurasitiki kumberi mudhiramu.Iyo dhiramu inopisa uchishandisa zvinhu zvinodziya kusvika pakunyunguduka kwepurasitiki.Zvinhu zvinopisa zvinoshandiswa nenzira dzakadaro dzinowedzera zvishoma nezvishoma kupisa kwebhodhoro kubva kumashure kusvika mberi.Kune nzvimbo nhatu dzinogoneka mune siruu inotenderera kureva nzvimbo yekudyisa, nzvimbo inonyungudika, uye nzvimbo yemita.Munzvimbo yekudya, mabheji epurasitiki anonyunguduka zvishoma nezvishoma paanenge achisundirwa nemudhiramu.Zvinhu zvepurasitiki zvakanyungudutswa zvachose munzvimbo inonyunguduka.Iyo thermostat inoshandiswa kuchengetedza kupisa kwemukati kwebhari.Kupisa kwepurasitiki kunofanirwa kuderedzwa izvo zvinogona kukonzera kuderedzwa muzvinhu zvemukati.Feni inotonhorera kana yekutonhodza mvura inoshandiswa kuchengetedza tembiricha yebhari panguva yekuita.Kumberi kwedhiramu, purasitiki yakanyungudutswa inosiya sikuruu uye inofamba nepascreen pack kubvisa chero tsvina mupurasitiki yakanyungudutswa.Masikirini anosimbiswa nendiro yekutyora.Iyo breaker plate assembly inoshandawo kugadzira kumashure kumanikidzwa mubhodhoro.Iyo yekumashure dzvinyiriro inopa kunyunguduka kwakafanana uye kusanganisa kwakaringana kwepurasitiki yakanyungudutswa mudhiramu.Mushure mekupfuura nepakati pendiro yekupwanya, plastiki yakanyungudutswa inopinda mukufa.Iyo inofa inopa chimiro chaidiwa chechigadzirwa chepurasitiki.Kuyerera kusina kuenzana kwepurasitiki yakanyungudutswa kwaizoburitsa zvinonetsa zvisingadiwe muchigadzirwa chepurasitiki.Izvi zvinonetsa zvinogona kukonzera warping mushure mekuoma kwepurasitiki yakanyungudutswa.Plastics yakanaka kwazvo thermal insulators uye saka zvakaoma kutonhora nekukurumidza.Chigadzirwa chepurasitiki chinotonhodzwa nekukwevera kuburikidza neseti yemapumburu ekutonhora.
Extrusion Process Parameters
Pane mashanu akakosha maitiro paramita anofanirwa kutariswa pamberi pe extrusion process:
- Kunyunguduka tembiricha epurasitiki
- Kukurumidza kwe screw
- Extrusion pressure inodiwa
- Mhando dzekufa dzinoshandiswa
- Kutonhora kwepakati
Screw Design:
Iyo dhizaini ye screw yakakosha pakugadzirwa kwepurasitiki.Inonyanya kuita mabasa matatu akasiyana: kureva, nzira yekudyisa;yunifomu kunyunguduka uye kusanganiswa kwepurasitiki uye pakupedzisira inogadzira thepress ure yekusundira iyo yakanyungudutswa kuburikidza nekufa.Kureba sikururu (L) kunongedzerwa kudhayamita yaro (D) sereshiyo yeL/D.Kazhinji, chiyero cheL/D chinoshandiswa se 24:1, asi pakuwedzera kusanganisa uye kubuda, inogona kuwedzera kusvika pa32:1.Pane nzvimbo nhatu dzinokwanisika mukureba uku kureva nzvimbo yekudya, nzvimbo yekunyunguduka, uye nzvimbo yemita.(a) Nzvimbo yekudya: Munzvimbo iyi, resin inoiswa kubva pahopper mudhiramu, uye kudzika kwechanera kunoramba kuripo.(b) Melting zone: Iyo yepurasitiki zvinhu zvinonyungudutswa uye kudzika kwechiteshi kunowedzera kudiki zvishoma.Inonziwo shanduko kana compression zone.(c) Metering zone: Purasitiki yakanyungudutswa inosanganiswa patembiricha yakafanana uye kumanikidzwa uye inotumirwa kuburikidza nedhiya.Kudzika kwechiteshi kunongogara munzvimbo yese iyi.
Nguva yekutumira: Jan-10-2019