Izitywino zerabha zePolyurethane, ezenziwe ngezinto zerabha ze-polyurethane, zizinto ezibalulekileyo kwiintlobo ngeentlobo zezicelo zoshishino. Ezi zivali ziza ngeendlela ezahlukeneyo, kuquka ii-O-rings, ii-V-rings, ii-U-rings, ii-Y-rings, ii-rectangular seals, ii-seals ezenziwe ngokwezifiso, kunye nee-sealing washers.
Irabha yePolyurethane, ipolymer eyenziweyo, ivala umsantsa phakathi kwerabha yendalo kunye neeplastiki eziqhelekileyo. Isetyenziswa kakhulu ekucutshungulweni koxinzelelo lwephepha lesinyithi, irabha ye-polyurethane ekuthethwa ngayo ngokuyintloko yeyohlobo lwe-polyester casting. Yenziwe nge-adipic acid kunye ne-ethylene glycol, nto leyo ebangela ipolymer enobunzima be-molecular obumalunga nama-2000. Le polymer iphinda isabela ekwenzeni i-prepolymer enamaqela esiphelo se-isocyanate. I-prepolymer emva koko ixutywa ne-MOCA (4,4′-methylenebis(2-chloroaniline)) ize iphoswe kwiimolds, ilandelwe yi-secondary vulcanization ukuvelisa iimveliso zerabha ye-polyurethane enamanqanaba obunzima obahlukeneyo.
Ubunzima be-polyurethane rubber seals bunokulungiswa ukuze buhlangabezane neemfuno ezithile zokucubungula i-sheet metal, ukusuka kwi-20A ukuya kwi-90A kwisikali sobunzima be-Shore.
Iimpawu eziphambili zokusebenza:
- Ukumelana Nokunxiba Okungaqhelekanga: Irabha yepolyurethane ibonakalisa ukumelana nokuguguleka okuphezulu kuzo zonke iintlobo zerabha. Uvavanyo lwelabhoratri lubonisa ukuba ukumelana nokuguguleka kwayo kuphindwe kathathu ukuya kahlanu kunerabha yendalo, kwaye ukusetyenziswa kwayo kwihlabathi lokwenyani kuhlala kubonakala ukuya kuthi ga kwi-10 ukuqina.
- Amandla Aphezulu kunye Nokuthamba: Ngaphakathi koluhlu lobunzima be-Shore A60 ukuya kwi-A70, irabha ye-polyurethane ibonisa amandla aphezulu kunye nokuthamba okugqwesileyo.
- Ukufunxa Okugqwesileyo kunye Nokufunxa Okumangalisayo: Kubushushu begumbi, izinto zerabha ze-polyurethane zinokufunxa i-10% ukuya kwi-20% yamandla okungcangcazela, kunye namazinga aphezulu okufunxa xa kuphindaphindwa ukungcangcazela.
- Ukumelana kakuhle kweoyile kunye neekhemikhali: Irabha yepolyurethane ibonisa ulwalamano oluncinci kwiioyile zeminerali ezingezizo ezomhlaba kwaye ayichaphazeleki kakhulu zizinto ezinamafutha (ezifana ne-kerosene kunye nepetroli) kunye neeoyile zoomatshini (ezifana neeoyile ze-hydraulic kunye ne-lubricating), ziphumelela ngaphezu kweerabha zenjongo jikelele kwaye zikhuphisana nerabha ye-nitrile. Nangona kunjalo, ibonisa ukudumba okukhulu kwi-alcohols, ii-esters, kunye nee-hydrocarbons ezinuka kamnandi.
- I-High Friction Coefficient: Ngokwesiqhelo ingaphezulu kwe-0.5.
- Iimpawu ezongezelelweyo: Ukumelana okuhle nobushushu obuphantsi, ukumelana ne-ozone, ukumelana nemitha, ubushushu bombane, kunye neempawu zokunamathela.
Izicelo:
Ngenxa yeempawu zayo eziphezulu zomzimba nezoomatshini, irabha ye-polyurethane isetyenziswa rhoqo kwizicelo zokusebenza okuphezulu, kubandakanya iimveliso ezingagugiyo, izinto ezinamandla okumelana neoyile, kunye nezinto ezinobunzima obuphezulu, ezineemodyuli eziphezulu. Isetyenziswa kakhulu kumashishini ahlukeneyo:
- Oomatshini kunye neeMoto: Ukuvelisa izinto ezithintela ukubhuleka ezisebenza rhoqo, iindawo zerabha ezilwa nokungcangcazela, izipringi zerabha, ii-couplings, kunye nezixhobo zelaphu.
- Iimveliso Ezingangeni Oyile: Ukuvelisa iirola zokuprinta, izitywini, izikhongozeli zepetroli, kunye nezitywini zeoyile.
- Iindawo eziNgxamisekileyo zokuGqithisela: Zisetyenziswa kwiipayipi zokuhambisa, ii-linings zezixhobo zokugaya, ii-screens, ii-filters, ii-foots zezihlangu, amavili okuqhuba ukungqubana, ii-bushings, ii-brake pads, kunye namatayara eebhayisekile.
- Ukucinezela Ngokubandayo Nokugoba: Kusebenza njengesixhobo seenkqubo ezintsha zokucinezela nangokugoba ngokubandayo, kuthatha indawo yeentsimbi ezitya ixesha elide nezibiza kakhulu.
- Irabha yeFoam: Ngokusebenzisa indlela amaqela e-isocyanate asabela ngayo ngamanzi ukuze akhuphe i-CO2, irabha yefoam ekhaphukhaphu eneempawu ezintle zoomatshini inokuveliswa, ilungele ukugquma, ukugquma ubushushu, ukuthintela isandi, kunye nokusetyenziswa kokulwa nokungcangcazela.
- Ukusetyenziswa Kwezonyango: Kusetyenziswa kwizinto zerabha ezisebenzayo, imithambo yegazi yokwenziwa, ulusu oluyilwe, iityhubhu zokufaka, izixhobo zokulungisa, kunye nokusetyenziswa kwamazinyo.
Ixesha leposi: Sep-17-2025