Kutulutsa kwa pulasitiki, monga mbiri ya UPVC (yolimba polyvinyl chloride) kapena zinthu zapaipi, zimapangidwa makamaka kudzera pakusakaniza, kutulutsa, kupanga, kutulutsa, ndi kudula utomoni wa PVC ndi zina zowonjezera.Zinthu zomwe zimakhudza momwe zinthu zimagwirira ntchito zimaphimba gawo lililonse pakupanga.Gawo lililonse limalumikizana komanso limakhudza wina ndi mnzake kudzera muzofalitsa zamalonda.Vuto limodzi likhoza kulipidwa ndi masitepe ena mkati mwa njira inayake, kotero kuti sitepe iliyonse imakhala yamoyo.Pakati pawo, zipangizo, zida chilinganizo ndi njira ntchito ndi zinthu zazikulu mu ndondomeko pulasitiki extrusion, amene mwachindunji zimakhudza khalidwe ndi linanena bungwe akamaumba extrusion.Nkhaniyi ikufotokoza za momwe extrusion amaonera zipangizo extrusion ndi zopangira.
Kawirikawiri, PVCmankhwala ntchito zowonjezera zotsatirazi kuchita extrusion ndondomeko:
1.PVC utomoni:
Polyvinyl chloride, yotchedwa PVC mu Chingerezi, ndi pulasitiki yachitatu yopangidwa kwambiri padziko lonse lapansi (pambuyo pa polyethylene ndi polypropylene).PVC inali pulasitiki yopangidwa kwambiri padziko lonse lapansi ndipo idagwiritsidwa ntchito kwambiri.Pali mitundu iwiri ya PVC: yolimba (nthawi zina imafupikitsidwa ngati RPVC) ndi yofewa.Olimba polyvinyl kolorayidi ntchito kumanga mapaipi, zitseko ndi mazenera.Amagwiritsidwanso ntchito kupanga mabotolo apulasitiki, zoyikapo, kubanki kapena makhadi amembala.Kuwonjezera mapulasitiki kumapangitsa kuti PVC ikhale yofewa komanso yotanuka kwambiri.Itha kugwiritsidwa ntchito mu mapaipi, kutchinjiriza chingwe, pansi, zikwangwani, zojambulira za phonograph, zinthu zowongoka komanso zolowetsa mphira.
stabilizer:
Chifukwa utomoni wa PVC ndi utomoni wosamva kutentha, umayamba kutsika kutentha kutentha kufika pafupifupi 90 mpaka 130 ° C, kutulutsa HCL yosakhazikika ndikupangitsa kuti utomoni ukhale wachikasu.Kutentha kumakwera, mtundu wa utomoni umakhala wakuda ndipo thupi ndi mankhwala azinthu zimachepa.Kuphatikiza pa kukonza njira zopangira utomoni zopangira utomoni, kuthetsa vuto lowonongeka makamaka kumaphatikizapo kuwonjezera zokhazikika ku utomoni wa PVC kuti uyamwe ndi kusokoneza mpweya wa HCL ndikuchotsa zomwe zimawononga.Machitidwe okhazikika omwe amagwiritsidwa ntchito nthawi zambiri ndi awa: mchere wotsogolera, organotin, sopo zachitsulo ndi zokhazikika zapadziko lapansi.
Mafuta (Parafini kapena sera ya PE):
Mtundu umodzi wowonjezera wowonjezera mafuta komanso kuchepetsa mawonekedwe omatira.Malinga ndi ntchito, amagawidwa m'malubricant akunja, mafuta amkati ndi mafuta amkati & akunja.Mafuta akunja amatha kuchepetsa kukangana pakati pa zinthu ndi chitsulo pamwamba kuti zinthu za UPVC zisamamatire ku mbiya ndikuwononga pambuyo pa pulasitiki.Mafuta amkati amatha kuchepetsa kukangana pakati pa tinthu tating'onoting'ono tating'onoting'ono, kufooketsa mgwirizano pakati pa mamolekyu ndikuchepetsa kusungunuka kwa ma viscosity.Kugwiritsiridwa ntchito kwa mafuta odzola kumakhudza kwambiri kuchepetsa wononga wononga, kuchepetsa kutentha kukameta ubweya, ndi kuonjezera kutuluka kwa extrusion.Mapangidwe a mafuta opangira mafuta pakupanga ndi ofunika kwambiri.
Zodzaza:
Pofuna kukonza kuuma ndi kusasunthika kwa zinthu, kuchepetsa kusinthika kwazinthu, ndikuchepetsa mtengo wazinthu zopangira, zodzaza ngati CaCO 3 nthawi zambiri zimawonjezeredwa popanga zinthu za UPVC.
Processing Modifier (ACR):
Cholinga chachikulu ndikuwongolera magwiridwe antchito azinthu, kufulumizitsa kuphatikizika kwa utomoni wa PVC, ndikuwongolera kutulutsa, mapindikidwe amafuta ndi gloss pamwamba pa zinthu.
Zosintha:
Cholinga chachikulu ndikuwongolera kukana kwazinthu, kukonza kulimba kwazinthu, komanso kukonza pulasitiki.Zosintha zomwe zimagwiritsidwa ntchito kwambiri pa UPVC ndi CPE (chlorinated polyethylene) ndi kusinthidwa kwa acrylate.
Makina opangira pulasitiki a zida za pulasitiki extrusion ndi mphamvu ya zosakaniza za formula pa izo:
Pali zida zambiri zopangira pulasitiki extrusion.Zomwe zimagwiritsidwa ntchito potulutsa zinthu zolimba za UPVC ndizomwe zimazungulira mozungulira ma twin-screw extruderconical twin screw extruder.Zotsatirazi zimakambirana kwambiri zamakina apulasitiki omwe amagwiritsidwa ntchito kwambiri potulutsa zinthu za UPVC.
Chotulutsa cholumikizira chozungulira cha conical twin-screw:
Nthawi yotumiza: Dec-29-2023
