Ngaphambi kwenkqubo ephambili ye-extrusion, i-polymeric feed egciniweyo ixutywa kunye nezongezelelo ezahlukeneyo ezifana nezinzisi (ubushushu, ukuzinza kwe-oxidative, ukuzinza kwe-UV, njl. umgangatho wemveliso kunye nokuqhubekeka. Ukudibanisa i-polymer kunye nezongezo zikwanceda ukufezekisa iinkcukacha zeprofayili yepropathi ekujoliswe kuyo.
Kwezinye iinkqubo ze-resin, inkqubo yokomisa eyongezelelweyo yokuthintela ukuthotywa kwepolymer ngenxa yokufuma idla ngokusetyenziswa. Kwelinye icala, ezo zingafuni ukomiswa phambi kokusetyenziswa, kusenokufuneka zomiswe ngakumbi xa ezi zigcinwe kumagumbi abandayo kwaye ngequbuliso zibekwe kwindawo efudumeleyo ngaloo ndlela kuqalwa ukufuma ukufuma kumphezulu wemathiriyeli.
Emva kokuba i-polymer kunye ne-additives zixutywe kwaye zomiswa, umxube uxhulumaniso olufakwe kwi-hopper yokutya kunye nomqala we-extruder.
Enye ingxaki eqhelekileyo xa uphatha izinto eziqinileyo ezifana nomgubo wepolymer kukuhamba kwayo. Kwezinye iimeko, ukudibanisa izinto ngaphakathi kwe-hopper kunokwenzeka. Ke ngoko, imilinganiselo ekhethekileyo efana nenaliti ye-nitrogen okanye nayiphi na igesi engasebenziyo ingasetyenziswa ukuphazamisa nayiphi na i-polymer eyakhiwe kumphezulu we-hopper yokutya ngaloo ndlela iqinisekisa ukuhamba kakuhle kwezinto.
Izinto eziphathekayo zihamba phantsi kwisithuba se-annular phakathi kwe-screw kunye ne-barrel. Izinto eziphathekayo nazo zibophelelwe ngumjelo we-screw. Njengoko i-screw ijikeleza, i-polymer igqithiselwa phambili, kwaye imikhosi ekhukhulayo isebenza kuyo.
Imiphanda iqhele ukufudunyezwa ngeprofayile yobushushu obunyuka ngokuthe ngcembe. Njengoko umxube wepolymer uhamba ukusuka kwindawo yokutya ukuya kwindawo yokulinganisa, amandla okubetha kunye nokufudumeza komgqomo kubangela ukuba izinto zenziwe ngeplastiki, zixutywe ngokulinganayo, kwaye zixutywe kunye.
Okokugqibela, njengoko inyibilika isondela esiphelweni se-extruder, idlula kuqala kwipakethi yesikrini. Ipakethe yesikrini isetyenziselwa ukucoca naziphi na izinto zangaphandle kwi-thermoplastic melt. Ikwakhusela umngxuma wepleyiti yokufa ekuvalelekeni. Ukunyibilika kunyanzeliswa ukuba kuphume kwidayizi ukuze kufumaneke ukumila kokufa. Ipholiswa ngoko nangoko kwaye itsalwe kude kwi-extruder ngesantya esingaguqukiyo.
Ezinye iinkqubo ezifana nokunyangwa kwedangatye, ukuprinta, ukusika, ukufakwa kwe-annealing, ukukhupha ivumba elimnandi, njl. njl. zingenziwa emva kokupholisa. I-extrudate iya kuthi emva koko ihlolwe kwaye iqhubeke nokupakishwa kunye nokuhanjiswa ukuba zonke iinkcukacha zemveliso zifezekisiwe.
Ixesha lokuposa: Dec-08-2022
