I-extrusion yepulasitiki yeshubhu, ipayipi nepayipi kuyinqubo eqhubekayo yokuguqula impahla eluhlaza ye-thermoplastic ibe umkhiqizo osuphelile noma osuphelile.Impahla eluhlaza ngokuvamile isesimweni samapellets epulasitiki noma impushana.Ukuguqulwa kwenzeka ngokwakha inqwaba encibilikisiwe ye-homogeneous ku-extruder futhi uyiphoqelele ngaphansi kwengcindezi ngokusebenzisa i-extrusion die orifice echaza umumo wengxenye ephambene yomkhiqizo.Izinto ezibunjiwe, noma i-extrudate, iyapholiswa futhi idonswe kude nendawo ephumayo ngenani elilawulwayo.I-extrudate ingabe isilinyazwa ku-spool, isikwe ubude obucacisiwe, noma iqondiswe kwenye inqubo yomugqa.
Ngokuphambene nokubumba komjovo noma ukubumba igalelo, okuyizinqubo ezijikelezayo, i-extrusion iyinqubo yesimo esizinzile.Lesi sici sokuzinzile sikhiqiza izinzuzo nezinselele ezihlukile njengenqubo yokukhiqiza.Imikhiqizo enwetshiwe mide kakhulu futhi iyaqhubeka, futhi inesigaba esiphambanayo esivame ukungashintshi ngokuphathelene ne-eksisi noma isiqondiso sokukhiqiza.Imikhiqizo ebunjwe ngomjovo iyizinto ezihlukene ezinezigaba ezihlukene ezihlukene ku-eksisi ngayinye.Iqiniso lokuthi i-extrusion ye-tube, i-hose kanye nepayipi kuyinqubo eqhubekayo kuzoxoxwa ngayo ezindaweni eziningi zalesi sihloko.Igama elisetshenziselwa ukuchaza ithubhu, ipayipi kanye nepayipi liyahlukahluka embonini kuya embonini.
Izisetshenziswa
Izingxenye ezinkulu zeshubhu, ipayipi, noma isistimu yokukhipha ipayipi ngokuvamile ihlukaniswa ibe izingxenye ezikhuphukela phezulu kwe-extruder, i-extruder ngokwayo, kanye nalezo ezingezansi kwe-extruder.Izingxenye ezikhuphuka nomfula zibandakanya okokusebenza kwe-resin yokudlulisa izinto zokusetshenziswa ku-extruder, kanye nokokusebenza kwe-resin conditioning okuzoshisa kuqala inhlaka, noma ilawule okuqukethwe komswakamo we-resin ngaphambi kokuthi ingene emphinjeni we-extruder feed.Izingxenye ezansi nomfula zifaka isihlungi se-resin encibilikisiwe noma isishintshi sesikrini, i-extrusion die assembly, ithangi lokucisha noma le-vacuum sizing, noma imaphi amathuluzi okulinganisa umkhiqizo, isilawuli sesivinini somugqa we-extrusion ngendlela yokudonsa ibhande noma isethi ye-nip roll, futhi ekugcineni umkhiqizo. isisetshenziswa esinqunyiwe noma okokusebenza okusongwayo.Kunezindlela ezengeziwe zenqubo ye-extrusion ezizothatha umkhiqizo okhishiwe ngqo kwenye inqubo yomugqa ukuze kungezwe i-reinforcement braiding noma ukwengezwa kwezinye izimbobo noma izendlalelo ze-resin.
Izinto zokwakha
Amasu okukhipha angasetshenziswa ukucubungula ama-thermoplastics amaningi kanye namapulasitiki athile e-thermoset.Ama-resin avame ukukhishwa amashubhu, ipayipi kanye nemikhiqizo yamapayipi ahlanganisa i-polyethylene ephezulu nephansi, i-polypropylene, i-polyurethane, i-polystyrene, i-fluoropolymers, i-PTFE, i-polyester, ne-PVC eguquguqukayo neqinile.Isici esivame ukuhlukanisa ama-resin akhishiwe kuma-resin abunjwe ngomjovo ukuncibilika kwe-viscosity yepulasitiki emazingeni okushisa ajwayelekile okucubungula.Amapulasitiki anwetshiwe avame ukuba ne-viscosity ephezulu yokuncibilika, okuvumela i-extrudate ukuthi igcine umumo onikezwe yona ngokufa ngenkathi i-extrudate isezigabeni zokucisha.Izinhlanganisela zama-resin ahlukahlukene zingasetshenziswa ukuze kutholakale izakhiwo ezikhethekile zomzimba, eziphilayo, noma zamakhemikhali.Izithasiselo eziningi zingasetshenziswa ngesikhathi senqubo ye-extrusion ukuthuthukisa izici zokucubungula ze-polymer noma ukushintsha izakhiwo zomkhiqizo.Izithasiselo ezinjalo zifaka izinto zokuthambisa, iziqinisi ezishisayo, ama-antioxidants, ama-radiopacifying agents, nama-colorants.
Icubungula Amapharamitha
Imingcele ebalulekile ekucutshungulweni kwe-extrusion iyafana naleyo yezinqubo zokubumba umjovo.Izinga lokushisa le-resin, ukucindezela kwe-resin, okuqukethwe komswakamo we-resin, isivinini se-screw, ne-screw motor amperage kuvame ukulawulwa noma ukugadwa ukuze kuhlinzekwe ukuncibilika okulinganayo ngesilinganiso sevolumu elawulwayo.Izinga lokushisa elicishayo kanye nezinga okukhishwa ngalo i-extrudate kuyalawulwa noma kugadwe ukuze kuhlinzekwe usayizi womkhiqizo olawulwayo.Izilinganiso zobukhulu, kusetshenziswa izindlela ezahlukahlukene zokulinganisa, zingathathwa i-extrudate njengoba ikhiqizwa.Ngokuphambene nokubumba umjovo, i-extrusion ingashintsha usayizi womkhiqizo wokugcina ngaphandle kokushintsha ithuluzi le-die.Ukubekezelela okuvamile kokukhiqizwa kwe-extrusion noma ukungaguquguquki kwenqubo kugcinwe ngaphakathi kuka-1% yenani elilinganiselwe elilinganiselwe.Njengoba lezi zinqubo zokukhiqiza zibandakanya izimo eziqhubekayo, noma isiphi isenzo esingamisa noma iyiphi ipharamitha noma isimo sizuzisa inqubo.
Isikhathi sokuthumela: May-09-2017