Rabala ndi polyurethane zonse ndi zinthu zodziwika bwino m'mafakitale, ndipo zonse ziwiri ndi zinthu zofunika kwambiri zomwe zimagwiritsidwa ntchito popanga zinthu zopondaponda ndi mawilo. Zipangizo zonsezi zili ndi ubwino ndi kuipa kwake, ndipo gawo lotsatira likufotokoza kusiyana kwake mwatsatanetsatane, komanso momwe mungasankhire chinthu chomwe mukufuna kugwiritsa ntchito.
Tiyeni tiyambe ndi kuyang'ana kusiyana kwa raba ndi polyurethane. Rabara ndi gawo lozungulira lopangidwa ndi zinthu za rabara zomwe nthawi zambiri zimakhala zosinthasintha komanso zosaterera. Rabara imagawidwa makamaka m'magulu a rabara lachilengedwe ndi rabara lopangidwa, ndipo imatha kusinthidwa kuti igwirizane ndi kuuma ndi kukana kukanda ngati pakufunika. Polyurethane nthawi zambiri imakhala yolimba komanso yolimba kuposa rabara. Ma polyurethane nthawi zambiri amapangidwa kuchokera ku polyurethane elastomers, omwe ali ndi kuchuluka komanso kuuma kwakukulu.
Kachiwiri, ma casters a rabara ndi ma polyurethane casters amagwira ntchito mosiyana m'njira zosiyanasiyana. Ma casters a rabara amagwira ntchito bwino pankhani yosinthasintha, yoteteza kutsetsereka komanso yoteteza mawu, ndipo ndi otsika mtengo komanso osavuta kuwakonza ndi kupanga. Chifukwa chake, ma casters a rabara ndi chisankho chabwino kwambiri m'malo omwe kusinthasintha ndi kuyamwa kwa shock kumafunika, monga m'zida zamankhwala, mipando, zida zamagetsi ndi zida zamasewera. Ma casters a polyurethane, kumbali ina, amagwira ntchito bwino pankhani yolimba, kukana kukwawa, komanso mphamvu yonyamula katundu, kotero ndi oyenera kwambiri m'mafakitale, opanga, ndi zomangamanga komwe kumafunika kunyamula katundu wolemera.
Mitundu iwiri ya ma casters ndi yosiyana pankhani yoteteza chilengedwe. Ma casters a rabara amafuna kugwiritsa ntchito mankhwala popanga zinthu, monga ma vulcanizing agents ndi ma accelerator, zomwe zingawononge chilengedwe. Koma ma casters a polyurethane ndi abwino kwambiri chifukwa ndi zinthu zobwezerezedwanso ndipo amapanga zinyalala zochepa panthawi yopanga zinthu.
Pomaliza, pankhani ya mtengo, zotchingira rabara ndizotsika mtengo pomwe zotchingira polyurethane ndizokwera mtengo. Izi zili choncho chifukwa zipangizo za polyurethane ndizokwera mtengo komanso zovuta kuzikonza, motero zotchingira polyurethane ndizokwera mtengo. Koma zipangizo za rabara ndizotsika mtengo ndipo njira yopangira ndi yosavuta, kotero zotchingira rabara ndizotsika mtengo.
Kotero, posankha zoyikapo raba ndi zoyikapo polyurethane, muyenera kusankha bwanji?
Ndipotu, zonsezi zili ndi ubwino ndi kuipa kwake, ndipo chisankho chenichenicho chiyenera kutengera momwe zinthu zilili. Ngati mukufuna zinthu zotanuka, zoletsa kutsetsereka komanso zoletsa kugwedezeka, monga mipando, zida zamagetsi ndi zida zamasewera, muyenera kusankha zotchingira rabara. Ngati mukufuna zotchingira zolemera kwambiri komanso zoteteza kuvulala, monga m'mafakitale, opanga ndi zomangamanga, muyenera kusankha zotchingira polyurethane.
Kupatula ma casters a rabara ndi ma polyurethane, palinso mitundu ina ya ma casters monga ma casters a nayiloni ndi ma PP. Mtundu uliwonse wa caster uli ndi ubwino ndi kuipa kwake ndipo uyenera kusankhidwa malinga ndi zosowa zenizeni. Kuphatikiza apo, posankha ma casters awa, muyenera kuyang'anitsitsa kwambiri makulidwe a mbale yachitsulo ya bulaketi, zinthu za mbale yachitsulo, makamaka, zimatsimikiza mphamvu yonyamula ndi chitetezo cha ma casters, siziyenera kunyalanyazidwa, yesani kusankha mtundu wa chitsulo cha manganese cha caster, chomwe mtundu wake ndi kudalirika kwake kuli kwakukulu kwambiri kuposa chitsulo wamba.
Inde, ayeneranso kulabadira kukula kwa ma casters ndi kukhazikitsa, kuonetsetsa kuti kukhazikitsa kosalala, kuti ntchito yake yachibadwa.
Nthawi yotumizira: Marichi-04-2024