Popeza kuchuluka kwa mafakitale kudayamba kukhala kovutirapo chifukwa cha kutentha kwadzaoneni, madera a caustic, kuthamanga kwamphamvu, ndi zina zambiri… makina osindikizira a elastomeric sakanathanso kupereka zaka zoyembekezeka zamoyo zomwe zimafunikira kuti makampani akhalebe opikisana.Polytetrafluoroethylene (PTFE) imapereka mwayi wothamanga pama RPM apamwamba, kutentha kwapamwamba ndi kutsika, komanso kupanikizika kwambiri kuposa chisindikizo cha elastomeric.
Ichi ndi chifukwa chakuti PTFE ndi chuma inert, opangidwa kupirira kutentha kwambiri, ali otsika coefficient wa mikangano, ndipo pamene pamodzi ndi kusankha fillers, PTFE amapereka kwapadera kuvala makhalidwe ndi zina mawotchi katundu kuti elastomer zisindikizo sangathe.
PTFE imalimbana ndi mankhwala kuposa PEEK.Ndizofewa kwambiri motero zimatengera mphamvu zochepa kuti zitheke kusindikiza, komanso zimakwawa ndi kutentha kochepa kwambiri kuposa momwe PEEK imachitira.Imatereranso- kukhala ndi coefficient yocheperako ya kukangana kumatanthauza kuti magawo amatha kutsetsereka movutikira, zomwe zimapangitsa kuti torque ikhale yocheperako pamakina osindikizira ndi zina.
PEEK ndi polima wolimba kwambiri, wandiweyani, wolimba.Ndi okwera mtengo.Imalimbananso ndi kutentha kwambiri.Mumagwiritsa ntchito nthawi zambiri pomwe PTFE kapena TFE yolimbitsa siyigwira kutentha.
Moltenmetal ndiyolondola, ngakhale PEEK kapena (yolimba) PTFE ndi ma elastomer, ndi ma polima a thermoplastic.
PEEK ili ndi mphamvu zamakina abwino kwambiri, kutentha kwambiri, kuyanjana kwamankhwala, komanso kukana kuvala.PTFE ili ndi mphamvu yabwino kwambiri yotsika / kutentha kwambiri, mikangano yotsika, ndipo imakhala yopanda mphamvu.Zida zonsezi zimatha kupangidwa ndi makina kapena kuumba.PEEK nthawi zambiri imakhala yokwera mtengo kuposa PTFE pamtengo wa $/lb, koma zosindikizira zambiri zimafunikira zinthu zocheperako ngati kuumba kugwiritsiridwa ntchito kupanga chinthu chosindikizira.Kwa zosindikizira zogwira ntchito kwambiri kusiyana kwa mtengo wazinthu zopangira sikuyenera kukhala vuto lalikulu.Koma pakugwiritsa ntchito kwazinthu zotsika mtengo, zotsika mtengo ndimawona pomwe pangakhale vuto.
Pachisindikizo champhamvu, pomwe zokakamiza sizikwera kwambiri, PTFE ikhoza kukhala chisankho chabwino chifukwa ili ndi mikangano yabwino kwambiri komanso yofananira.Chinthu chimodzi makamaka zabwino za PTFE chisindikizo kuthamanga pamwamba zitsulo ndi kuti m'kupita kwa nthawi wosanjikiza wa PTFE anasamutsa pamwamba zitsulo, zomwe zimabweretsa PTFE-pa-PTFE kukhudzana ndi otsika mikangano ndi kutayikira.Cholepheretsa chimodzi chachikulu chogwiritsira ntchito PTFE yosadzazidwa posindikiza kukakamiza ndikuti imakhala ndi chizolowezi chozizira pamene ikukumana ndi kupanikizika kosalekeza kwa nthawi yaitali.
ETFE ndi thermoplastic yolimba.FEP fluorinated ethylene propylene) ilinso thermoplastic yolimba, ngakhale ndi yofewa kuposa PFA kapena PTFE- si elastomer.Polytetrafluoroethylene-co-propylene (Aflas) ndi elastomer, monga momwe fluoroelastomer (tradename Viton- (FKM)) ndi perfluoroelastomers monga tradename Kalrez (FFKM).Zonse zitha kugwiritsidwa ntchito posindikiza (kulongedza a, ma gaskets, mipando ya mavavu) koma ma elastomer okha ndi omwe angagwiritsidwe ntchito podzisindikizira zokha monga mphete.Mphete za O zimatha kuzunguliridwa ndi zida za nonelastomeric koma zimatha komanso zimakhudza kuthekera kwawo kusindikiza gasi.
Nthawi yotumiza: Feb-27-2017