Los tiv thaiv-Kev laus hloov kho Technology thiab Txhim Kho Siab-Tub Nruas Ua Haujlwm ntawm Track Pads
Dab tsi yog cov qauv kev ua kom zoo tshaj plaws rau kev tiv thaiv - kev hloov pauv kev laus ntawm hauv qab - cov ntaub ntawv tsheb ciav hlau?
Cov txheej txheem tseem ceeb ntawm kev ua kom zoo rau kev tiv thaiv - kev hloov pauv kev laus ntawm hauv qab - cov ntaub ntawv tsheb ciav hlau yog ntxiv peb hom kev ua haujlwm ntxiv rau styrene -butadiene roj hmab matrix los ua ke txhim kho siab - kub tsis kam thiab tiv thaiv - kev laus ua haujlwm. Ua ntej, antioxidant 1010 yog ntxiv nrog tus nqi ntawm 0.5%-1.0% ntawm cov roj hmab loj. Cov tshuaj tiv thaiv antioxidant no tuaj yeem ntes cov dawb radicals, inhibit oxidative degradation ntawm roj hmab, thiab ua rau cov thermos ua kom qis dua -oxidative aging. Thib ob, cua sov-tus neeg sawv cev tiv taus cov pa roj carbon dub N330 ntxiv nrog rau qhov nyiaj ntawm 30%-40% ntawm cov roj hmab loj. Cov pa roj carbon dub tuaj yeem tsis tsuas yog txhim kho lub zog thiab hnav tsis kam ntawm lub ncoo tab sis tseem muaj kev cuam tshuam txog ultraviolet rays thiab tshav kub, txo qhov kev puas tsuaj ntawm kub kub rau roj hmab. Thaum kawg, tus neeg sawv cev txhawb nqa silica ntxiv nrog tus nqi ntawm 10% -15% ntawm cov roj hmab loj. Silica tsim ib lub network ruaj khov nrog cov roj hmab molecular chains, txhim khu lub peev xwm los tiv thaiv deformation ntawm roj hmab thiab tiv thaiv kom tsis txhob deformation ntawm lub ncoo ntawm qhov kub thiab txias. Kev laus ntawm cov khoom siv roj hmab hloov ntawm 100℃tsuas yog 1/3 ntawm cov ntaub ntawv ib txwm muaj, thiab lub neej kub-resistant yog nce mus rau ntau tshaj 15 xyoo. Tsis tas li ntawd, qhov sib ntxiv ntawm cov roj paraffin hauv cov mis yuav tsum tau tswj tsawg dua lossis sib npaug li 5% kom tsis txhob muaj cov nplaum nplaum ntawm lub ncoo los ntawm cov roj paraffin tsiv teb tsaws.
Dab tsi yog qhov siab - qhov kub thiab txias qhov sib txawv ntawm kev hloov kho nyob rau hauv - cov ntaub ntawv tsheb ciav hlau thiab cov pawm zoo li qub?
Qhov siab - qhov kub thiab txias qhov sib txawv ntawm kev hloov kho nyob rau hauv - cov ntaub ntawv tsheb ciav hlau thiab cov pawm zoo tib yam yog qhov tseem ceeb hauv peb yam: elasticity retention rate, anti-aging life and dimensional stability. Nyob rau ntawm qhov kub ntawm 80 degree, tom qab 5000 teev ntawm kev laus, qhov elastic modulus tuav tus nqi ntawm cov ntaub ntawv hloov kho yog ntau dua los yog sib npaug li 85%, thaum cov pawm zoo tib yam tsuas yog kwv yees li 50%, nrog rau cov elastic attenuation hnyav. Hais txog kev tiv thaiv- lub neej kev laus, kev pabcuam lub neej ntawm cov ntaub qhwv hloov pauv hauv siab - qhov kub thiab txias ntawm lub txaj tuaj yeem ncav cuag 15 xyoo, uas yog ntau tshaj li ob npaug ntawm cov ntaub qhwv zoo tib yam, txo cov nqi hloov pauv. Nyob rau hauv cov nqe lus ntawm qhov ntev stability, lub thermal shrinkage tus nqi ntawm hloov ntaub ntawv ntawm 100℃yog tsawg tshaj li los yog sib npaug rau 2%, thaum uas zoo tib yam pads yog ntau tshaj los yog sib npaug rau 8%, uas yog ib qho yooj yim ua rau tsis zoo haum ntawm lub ncoo thiab pw tsaug zog. Tsis tas li ntawd, cov ntaub qhwv hloov kho tau zoo dua huab cua tiv thaiv, thiab qhov kev laus ntawm cov hluav taws xob ultraviolet tsuas yog 1/4 ntawm cov ntaub qhwv zoo tib yam, haum rau qhib - cov kab huab cua raug siab - tshav ntuj kub. Cov txheej txheem compression ntawm cov ntaub ntawv hloov pauv tsawg dua lossis sib npaug li 15%, thaum cov ntaub qhwv zoo tib yam yog ntau dua lossis sib npaug li 30%, uas yooj yim rau poob elasticity nyob rau hauv ntev - lub sijhawm thauj khoom.
Dab tsi yog qhov yuav tsum tau hloov kho ntawm kev hloov kho hauv qab - cov tsheb ciav hlau rau qhov sib txawv siab - qhov kub thiab txias?
Cov kev hloov pauv ntawm kev hloov kho nyob rau hauv - tsheb ciav hlau pads rau qhov sib txawv siab - qhov kub thiab txias ib puag ncig yog qhov tseem ceeb rau kev kho qhov sib piv ntxiv thiab hom roj hmab matrix. Qhov kub ntawm cov suab puam siab - qhov kub thiab txias ib puag ncig tuaj yeem ncav cuag 70-80℃, thiab cov hluav taws xob ultraviolet muaj zog. Nws yuav tsum tau ua kom cov antioxidant ntxiv rau 1.0%, cov pa roj carbon dub N330 ntxiv rau 40%, thiab ntxiv 2% ultraviolet absorber. Cov roj hmab matrix siv cov roj hmab nitrile los txhim kho huab cua tsis kam thiab kub ua haujlwm. Qhov chaw sov huab cua sov siab - qhov kub thiab txias ib puag ncig yog tus yam ntxwv ntawm qhov kub thiab txias. Nws yuav tsum tau ntxiv 1.5% fungicide, 0.8% antioxidant, 35% carbon dub. Cov roj hmab matrix txais cov neoprene kom sib npaug ntawm cov cua sov thiab dej tsis kam. Cov nroj tsuag muaj siab - qhov kub thiab txias ib puag ncig muaj kua qaub - puag corrosion. Nws yuav tsum tau ntxiv 5% los tiv thaiv- tus neeg saib xyuas corrosion, 0.7% antioxidant, 30% carbon dub. Cov roj hmab matrix siv EPDM roj hmab los txhim kho cov tshuaj tiv thaiv corrosion. Lub toj siab siab -kub qis- oxygen ib puag ncig muaj cov pa oxygen tsawg, thiab oxidative aging tus nqi kuj qeeb. Cov tshuaj tiv thaiv antioxidant ntxiv yog 0.5%, cov pa roj carbon dub ntxiv yog 30%, thiab cov roj hmab matrix txais cov roj hmab styrene-butadiene kom sib npaug ntawm kev ua haujlwm thiab kev lag luam.
Dab tsi yog qhov tseem ceeb vulcanization molding txheej txheem cov ntsiab lus ntawm kev hloov kho nyob rau hauv -rail pads?
Cov ntsiab lus tseem ceeb ntawm vulcanization molding txheej txheem ntawm kev hloov kho nyob rau hauv -rail pads yog concentrated nyob rau hauv kev tswj kub thiab kev hloov siab los xyuas kom meej crosslinking ceev thiab kev ua tau zoo stability ntawm roj hmab. Hauv kev sib xyaw ua ke, cov roj hmab thiab cov khoom ntxiv yuav tsum tau muab sib xyaw rau hauv ib qho khoom sib xyaw, qhov sib tov yog tswj ntawm 80-90 degree, thiab lub sij hawm sib tov yog 10-15 feeb kom tsis txhob decomposition ntawm additives vim kub siab. Nyob rau hauv lub vulcanization theem, lub tiaj vulcanizing tshuab yog siv, vulcanization kub yog 150-160 degree, vulcanization siab yog 15-18MPa, thiab lub sij hawm vulcanization yog 20-25 feeb. Qhov kub ntawm vulcanization ntau dhau yuav ua rau cov roj hmab scorching, thiab kub qis heev yuav ua rau vulcanization tsis tiav. Segmented kub tswj yuav tsum tau saws thaum lub sij hawm vulcanization, lub cua sov tus nqi yog 5℃/ min, qhov kub thiab txias yuav tsum nyob twj ywm nyob rau hauv lub tshav kub preservation theem, thiab lub txias tus nqi yog 3℃/ min nyob rau hauv lub txias theem kom tsis txhob muaj kev ntxhov siab nyob rau hauv lub ncoo tshwm sim los ntawm ntau kub sib txawv. Tom qab vulcanization, theem nrab vulcanization yog nqa tawm ntawm 100℃rau 2 teev los txhim kho cov kev tiv thaiv kev laus ntawm lub ncoo. Tom qab tsim, kev ntsuam xyuas hardness yuav tsum tau nqa tawm, Shore hardness ntawm lub ncoo yog tswj ntawm 55-60HA, nrog ib tug sib txawv tsawg tshaj li los yog sib npaug zos rau ± 2HA los xyuas kom meej tias cov elastic kev ua tau zoo raws li cov qauv tsim.
Dab tsi yog qhov ntawm - qhov chaw nteg thiab tu cov ntsiab lus ntawm kev hloov kho hauv qab - tsheb ciav hlau pads?
Qhov ntawm - qhov chaw tso thiab kev saib xyuas ntawm kev hloov kho hauv qab - cov tsheb ciav hlau yuav tsum tau tsom mus rau qhov chaw pw thiab kev tshawb nrhiav kev laus. Kev tso dej yuav tsum tau ua thaum qhov kub qis dua 35℃kom tsis txhob muaj qhov deformation vim qhov kub ntawm - qhov kub thiab txias. Ua ntej tso, cov khib nyiab thiab cov roj stains nyob rau saum npoo ntawm tus neeg pw tsaug zog yuav tsum tau muab ntxuav kom huv si kom paub meej tias lub ncoo yog tag nrho txuas nrog rau cov neeg pw tsaug zog, nrog rau qhov chaw sib cuag ntau dua lossis sib npaug li 95%. Cov kev taw qhia tso ntawm lub ncoo yuav tsum tau ua nruj me ntsis raws li lub cim, qhov hnav - tiv taus nto ntsej muag mus rau kev sib cuag nrog txoj kev tsheb ciav hlau, thiab cov khoom tiv thaiv - plam nto ntsej muag mus cuag tus neeg pw tsaug zog; thim rov qab tso yog txwv tsis pub. Tom qab tso, qhov elasticity ntawm lub ncoo yuav tsum tau sim nrog lub tshuab ntsuas compression zoo li qub, thiab tus nqi rov qab thaum tus nqi compression yog 10% ntau dua lossis sib npaug li 90%. Thaum lub sij hawm tu, qhov kev laus ntawm cov ntaub qhwv yuav tsum tau kuaj tsis tu ncua nrog kev tshuaj xyuas lub voj voog ntawm 1 xyoo. Cov ntsuas ntsuas suav nrog hardness hloov pauv tus nqi thiab elastic modulus tuav tus nqi. Yog hais tias qhov hardness hloov siab tshaj 10% los yog lub elastic modulus tuav tus nqi qis dua 80%, lub ncoo yuav tsum tau hloov nyob rau hauv lub sij hawm. Tsis tas li ntawd, tsis txhob sib cuag ntawm lub ncoo thiab cov kuab tshuaj organic xws li cov roj cav thiab cov roj diesel kom tsis txhob muaj roj hmab o thiab kev laus.