Ma board a thovu a PVC amagwiritsidwa ntchito m'mbali zonse za moyo, makamaka pazomangira. Kodi mukudziwa zovuta zomwe zingachitike popanga matabwa a thovu a PVC? Pansipa, mkonzi adzakuuzani za iwo.
Kutengera ndi mitundu yosiyanasiyana ya thovu, imatha kugawidwa kukhala thovu lalikulu komanso lotsika thovu. Malinga ndi kufewa ndi kuuma kwa thovu, amatha kugawidwa muzitsulo zolimba, zolimba komanso zofewa. Malinga ndi kapangidwe ka cell, imatha kugawidwa m'mapulasitiki a thovu otsekeka komanso mapulasitiki a thovu lotseguka. Mapepala a thovu a PVC wamba ndi mapepala olimba otsekeka opanda thovu. PVC thovu mapepala ndi ubwino kukana dzimbiri mankhwala, kukana nyengo, retardancy lawi, etc., ndipo chimagwiritsidwa ntchito mbali zambiri, kuphatikizapo mapanelo anasonyeza, zizindikiro, zikwangwani, partitions, mapanelo yomanga, mapanelo mipando, etc. Kusakwanira kusungunula mphamvu adzakhala kumabweretsa ma cell akuluakulu mu pepala la thovu ndi zigawo zazitali zazitali. Njira yolunjika yodziwira ngati mphamvu yosungunuka ndiyosakwanira ndikupita kumbuyo kwa odzigudubuza atatu ndikusindikiza mbale yokulungidwa pa chogudubuza chapakati ndi zala zanu. Ngati mphamvu yosungunula ili bwino, mutha kumva kukhazikika mukamakanikiza. Ngati zimakhala zovuta kuphuka pambuyo popanikizidwa, zimasonyeza kuti mphamvu yosungunuka ndi yochepa. Chifukwa mawonekedwe a screw ndi njira yozizirira ndizosiyana, zimakhala zovuta kuweruza ngati kutentha kuli koyenera. Nthawi zambiri, mkati mwa katundu wololedwa wa extruder, kutentha m'madera 3-5 kuyenera kukhala kotsika momwe mungathere. Kuti mupeze zopangira thovu yunifolomu m'mapepala a thovu, ndikofunikira kuwonetsetsa kuti zinthu za PVC zili ndi mphamvu zosungunuka bwino. Choncho, khalidwe la chowongolera thovu ndilofunika kwambiri. Mwachitsanzo, kuwonjezera pa ntchito zoyambira zothandizira kukonza zolinga, chowongolera chotulutsa thovu chimakhalanso ndi kulemera kwa mamolekyu ndi kusungunuka kwamphamvu, komwe kumatha kupititsa patsogolo kusungunuka kwamphamvu kwa osakaniza a PVC ndikuletsa thovu ndi kupasuka. , zomwe zimapangitsa kuti maselo azikhala ofanana kwambiri komanso kachulukidwe kakang'ono kazinthu, komanso kuwongolera gloss pamwamba pa chinthucho. Kumene, mlingo wa yellow thovu wothandizila ndi woyera thobvu wothandizira ayeneranso chikugwirizana.
Pankhani ya matabwa, ngati kukhazikika sikukwanira, kumakhudza gulu lonse lapansi ndi pamwamba pa bolodi kuti likhale lachikasu, ndipobolodi la thovuadzakhala brittle. Njira yothetsera vutoli ndi kuchepetsa kutentha kwa processing. Ngati palibe kusintha, mutha kusintha mawonekedwewo ndikuwonjezera kuchuluka kwa stabilizer ndi lubricant moyenera. Stabilizer ndi njira yothira mafuta yotengera mafuta ochokera kunja kuti apititse patsogolo kusungunuka kwa zinthuzo. Zida zosagwira kutentha zimakhala ndi madzi abwino. , kukana kutentha kwabwino; kukana kwamphamvu kwanyengo, kubalalitsidwa kwabwino, kulimba komanso kusungunuka; bata kwambiri, plasticizing fluidity, lonse processing osiyanasiyana, applicability wamphamvu ndi wothandiza kondomu mkati ndi kunja. Lubricant ali ndi mamasukidwe otsika, katundu wapadera kwambiri, lubricity kwambiri ndi kubalalitsidwa, ndipo chimagwiritsidwa ntchito pokonza pulasitiki ndi mafakitale ena. Iwo ali wabwino mkati ndi kunja kondomu zotsatira; ali ngakhale bwino ndi polyethylene, polyvinyl kolorayidi, polypropylene, etc. Ntchito ngati dispersant, lubricant ndi kuwala pa akamaumba ndondomeko PVC mbiri, mipope, zovekera chitoliro, Pe ndi PP, kumapangitsanso digiri ya plasticization, kusintha toughness ndi yosalala. pamwamba pa mankhwala apulasitiki, ndipo akhoza kusinthidwa mmodzimmodzi, kupanga zosavuta kupeza mwamsanga mavuto Kulikonse kumene inu muli, kuthetsa vutoli mwamsanga. Pankhani ya lubricant bwino, kusakwanira kwakunja kwakunja kumawonekera chifukwa chakuti kutentha m'chigawo cha 5 cha extruder kumakhala kovuta kuwongolera komanso kumatenthetsa mosavuta, zomwe zimapangitsa kutentha kwambiri pachimake chosinthira, mavuto monga thovu lalikulu, thovu, ndi thovu. chikasu pakati pa bolodi, ndi pamwamba pa bolodi si yosalala; Kutsetsereka kwakukulu kumapangitsa kuti mvula ikhale yoopsa, yomwe idzadziwonetsera yokha mumpangidwe mkati mwa nkhungu ndi mpweya wa kunja kwa mbale pamwamba pa mbale. Zidzawonekeranso ngati zochitika zina zamunthu zomwe zikuyenda mmbuyo ndi mtsogolo mosakhazikika pa mbale. Kusakwanira kwamkati kumatanthauza kuti ndizovuta kuwongolera makulidwe a bolodi, omwe ndi okhuthala pakati komanso owonda mbali zonse. Kutsika kwambiri kwamkati kungayambitse kutentha kwambiri pakatikati pa converging.
Nthawi yotumiza: Jul-03-2024