Zisindikizo za rabara za polyurethane, opangidwa kuchokera ku zipangizo za rabara za polyurethane, ndizofunika kwambiri pamagulu osiyanasiyana a mafakitale. Zisindikizozi zimabwera m'njira zosiyanasiyana, kuphatikizapo O-ring's, V-rings, U-rings, Y-rings, zisindikizo zamakona anayi, zisindikizo zooneka ngati mwachizolowezi, ndi zotsuka zotsuka.
Rabara ya polyurethane, polima yopangira, imatseka kusiyana pakati pa mphira wachilengedwe ndi mapulasitiki wamba. Amagwiritsidwa ntchito kwambiri popanga zitsulo zachitsulo, mphira wa polyurethane womwe ukufunsidwa makamaka ndi mtundu wa polyester kuponyera. Amapangidwa kuchokera ku adipic acid ndi ethylene glycol, zomwe zimapangitsa polima ndi kulemera kwa maselo pafupifupi 2000. The prepolymer ndiye wosakanizidwa ndi MOCA (4,4′-methylenebis(2-chloroaniline)) ndi kuponyedwa mu zisamere pachakudya, kutsatiridwa ndi vulcanization yachiwiri kupanga polyurethane mphira mankhwala ndi milingo kuuma mosiyanasiyana.
Kuuma kwa zisindikizo za rabara za polyurethane zitha kupangidwa kuti zikwaniritse zofunikira zachitsulo zachitsulo, kuyambira 20A mpaka 90A pamlingo wa kuuma kwa Shore.
Mchitidwe Wofunika Kwambiri:
- Kukaniza Kuvala Kwapadera: Rabara ya polyurethane imawonetsa kukana kwapamwamba kwambiri pakati pa mitundu yonse ya rabala. Mayeso a labotale akuwonetsa kuti kukana kwake kuvala ndi 3 mpaka 5 kuposa mphira wachilengedwe, ndikugwiritsa ntchito zenizeni nthawi zambiri kumawonetsa kulimba kwa 10.
- Kulimba Kwambiri ndi Kukhazikika: Mkati mwa kuuma kwa Shore A60 mpaka A70, mphira wa polyurethane amawonetsa kulimba kwambiri komanso kulimba kwambiri.
- Superior Cushioning ndi Shock Absorption: Pa kutentha kwa chipinda, zigawo za rabara za polyurethane zimatha kuyamwa 10% mpaka 20% ya mphamvu zogwedezeka, ndi mayamwidwe apamwamba pa maulendo owonjezereka a vibration.
- Kukaniza Kwabwino Kwambiri kwa Mafuta ndi Chemical: Rabara ya polyurethane imawonetsa kuyanjana kochepa kwamafuta amchere omwe si a polar ndipo amakhalabe osakhudzidwa ndi mafuta (monga palafini ndi mafuta) ndi mafuta amakina (monga ma hydraulic ndi mafuta opaka mafuta), opambana ma raba opangira zinthu zambiri komanso mphira wa nitrile. Komabe, imawonetsa kutupa kwakukulu mu mowa, esters, ndi ma hydrocarbon onunkhira.
- High Friction Coefficient: Nthawi zambiri pamwamba pa 0.5.
- Katundu Wowonjezera: Kukana kwabwino kwa kutentha kochepa, kukana kwa ozoni, kukana kwa radiation, kutchinjiriza kwamagetsi, ndi zomatira.
Mapulogalamu:
Chifukwa cha mphamvu zake zapamwamba komanso zamakina, mphira wa polyurethane umagwiritsidwa ntchito mobwerezabwereza pazinthu zogwira ntchito kwambiri, kuphatikizapo zinthu zosavala, mafuta amphamvu kwambiri, ndi kuuma kwakukulu, zigawo za modulus. Imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana:
- Makina ndi Magalimoto: Kupanga zinthu zotchingira mabuleki othamanga kwambiri, zida za mphira zotsutsana ndi kugwedera, akasupe a mphira, zolumikizira, ndi zida zamakina a nsalu.
- Zinthu Zosamva Mafuta: Kupanga zodzigudubuza zosindikizira, zosindikizira, zotengera mafuta, ndi zosindikizira zamafuta.
- Malo Ovuta Kwambiri: Amagwiritsidwa ntchito m'mapaipi otumizira, zomangira zida, zowonera, zosefera, sole za nsapato, mawilo oyendetsa, ma bushing, ma brake pads, ndi matayala a njinga.
- Kupondereza Kozizira ndi Kupinda: Kugwira ntchito ngati chinthu chopangira njira zatsopano zokhotakhota ndi kupendekera, m'malo mwa zitsulo zomwe zimawononga nthawi komanso zokwera mtengo.
- Mpira wa Foam: Potengera momwe magulu a isocyanate amachitira ndi madzi kuti atulutse CO2, mphira wopepuka wopepuka wokhala ndi makina abwino kwambiri amatha kupangidwa, abwino pakutchinjiriza, kutchinjiriza kutentha, kutsekereza mawu, komanso kugwiritsa ntchito anti-vibration.
- Ntchito Zachipatala: Zomwe zimagwiritsidwa ntchito pazigawo za rabara, mitsempha yamagazi, khungu lopangidwa, machubu olowetsera, zipangizo zokonzera, ndi ntchito za mano.
Nthawi yotumiza: Sep-17-2025