Pamberi peiyo main extrusion process, iyo yakachengetwa yepolymeric feed inosanganiswa neakasiyana ekuwedzera akadai seanosimbisa (yekupisa, oxidative kugadzikana, UV kugadzikana, nezvimwewo), pigment dzeruvara, zvinodzosa moto, mafirita, mafuta ekuzora, zvinosimbisa, nezvimwe. chigadzirwa kunaka uye processability. Kusanganisa polymer nezvinowedzerwa kunobatsirawo kuzadzisa iyo yakanangwa yeprofile profiles.
Kune mamwe masisitimu eresin, imwe nzira yekuomesa yekudzivirira kuparara kwepolymer nekuda kwehunyoro inowanzo shandiswa. Kune rimwe divi, kune izvo zvisingawanzo kuda kuomeswa zvisati zvashandiswa, zvinogona kuramba zvichiomeswa kunyanya kana izvi zvakachengetwa mumakamuri anotonhora uye zvakangoerekana zvaiswa munzvimbo inodziya zvichibva zvatanga kunyorova pamusoro pechinhu.
Mushure mekunge iyo polymer uye zvinowedzera zvakasanganiswa uye zvakaomeswa, musanganiswa isimba rinodyiswa mukati mekudya hopper uye kuburikidza neextruder huro.
Rimwe dambudziko rinowanzoitika kana uchibata zvinhu zvakasimba sepolymer poda kuyerera kwayo. Kune zvimwe zviitiko, kubhuroka kwezvinhu mukati mehopper kunogona kuitika. Saka, matanho akakosha senge jekiseni re nitrogen kana chero gasi inert rinogona kushandiswa kukanganisa chero polymer inovaka pamusoro peiyo hopper yekudyisa nekudaro kuve nechokwadi chekuyerera kwakanaka kwechinhu.
Izvo zvinhu zvinoyerera zvichidzika munzvimbo ye annular pakati pe screw ne barrel. Izvo zvinhu zvakare zvakasungwa ne screw channel. Sezvo screw inotenderera, iyo polymer inoendeswa kumberi, uye frictional forces anoita pairi.
Madhiramu acho anowanzo kupiswa ane tembiricha inowedzera zvishoma nezvishoma. Sezvo musanganiswa wepolymer unofamba kubva kunzvimbo yekudyisa uchienda kunzvimbo yemita, masimba anopokana uye kupisa kwembiya kunoita kuti zvinhu zviitwe purasitiki, zvakasanganiswa zvine mutsindo, uye kukanyaniswa.
Chekupedzisira, sezvo kunyungudika kunosvika kumagumo eiyo extruder, inopfuura yekutanga kuburikidza nescreen pack. Iyo skrini pack inoshandiswa kusefa chero zvinhu zvekunze mune thermoplastic melt. Inodzivirirawo gomba rekufa kubva pakuvhara. Iyo yakanyunguduka inozomanikidzwa kubuda mufa kuti iwane iyo die shape. Inobva yatonhodzwa uye yakadhonzwa kubva kune extruder pane inogara ichimhanya.
Mamwe maitiro senge kurapa kwemurazvo, kudhinda, kucheka, kupinza, deodorization, nezvimwe zvinogona kuitwa mushure mekutonhora. Iyo extrudate inozoongororwa uye kuenderera mberi nekurongedza uye kutumira kana zvese zvigadzirwa zvasangana.
Nguva yekutumira: Zvita-08-2022
