Polyethylene yapamwamba kwambiri (UHMWPE, UHMW) ndi kagawo kakang'ono ka thermoplastic polyethylene.Imadziwikanso kuti high-modulus polyethylene, (HMPE), ...
Ultra High Molecular Weight polyethylene (UHMW-PE) ndi engineering thermoplastic yokhala ndi molekyulu yolemera kuposa 3.1 AMUs (mayunitsi a atomiki).Kulemera kwa maselo kumapangitsa zinthu zingapo zofunika kwambiri, osati zochepa zomwe zimakhala zodziwika bwino za abrasion, mphamvu yamphamvu kwambiri komanso kugunda kwapansi.Kuphatikiza apo, polimayo ili ndi kukana kwamankhwala abwino, mawonekedwe abwino kwambiri ochepetsera mawu, ma dielectric apamwamba kwambiri komanso ma insulating magetsi ndipo samamwa chinyezi.
Zinthuzi, kuphatikizapo kuphweka kwa makina, zimapanga UHMW-PE, zinthu zotsika mtengo zomwe zimakwaniritsa zofunikira za FDA ndi USDA kuti zigwirizane ndi chakudya chachindunji, zimagwiritsidwa ntchito kwambiri m'mafakitale a zakudya, zakumwa, zamankhwala ndi zamankhwala.UHMW-PE wosakhala bwino umalepheretsa kukula kwa bowa kapena mabakiteriya.UHMW-PE imagwiritsidwanso ntchito kwambiri muzovala, kukonza mankhwala, zamkati ndi mapepala, migodi, nyanja, zitsulo, madzi ndi zimbudzi, kusamalira zinthu zambiri ndi mafakitale azaulimi.
Katundu wa UHMW-PE amatha kukulitsidwa pogwiritsa ntchito zowonjezera monga zopaka utoto, UV ndi zowongolera kutentha, anti-static agents, zodzaza zosamva kuvala komanso mafuta ochepetsa kugunda.Zitsulo kapena ores zitha kugwiritsidwa ntchito kuonjezera kulemera ndi kupanga polima maginito kudziwika, pamene filler ena amawonjezera kutentha ntchito chilengedwe.
Chifukwa UHME-PE ndi polima wa semi-crystalline, iyenera kutenthedwa ndi kuponderezana kapena kutulutsa kwamphongo.Annealing, pamaso Machining, kumathandiza kuchotsa processing anatsindika chifukwa sintering.Zigawo zomalizidwa ndi makina zimathanso kutsekeredwa, koma mbali zotere ziyenera kukonzedwa panthawi yozizirira kuti zilole kucheperako pakumangirira.Kupanga movutikira kuyenera kuchitidwa musanachepetse kupsinjika kotero kuti kusintha kwapang'onopang'ono kutha kutheka pakukonza komaliza.
Zopezeka m'mapepala, ndodo, ndi machubu opangira magawo okhazikika, UHMW-PE imatha kuchekedwa, kupukuta, kutembenuza, kukonzedwa, kubowola kapena kukhomerera.Zida zodulira ziyenera kukhala ndi ngodya zazitali komanso malo okwanira oti chombocho chisatseke.Mitengo ya chakudya iyenera kukhala yokwera kwambiri kuti nthawi yocheperako iloledwe kuti chida chodulira chitenthetse zinthuzo ndi kukangana.Chisamaliro chiyenera kutengedwa kuti zida zikhale zakuthwa chifukwa UHMW-PE imatha kuyimitsa m'mphepete mwa zida, zomwe zimapangitsa kuti pakhale kusokoneza.Mawonekedwe apamwamba apamwamba amatha kupezeka pogwiritsa ntchito zida zodulira zoyenera, ngakhale kuyesa kukonza zolakwika polemba kapena kusenda mchenga kumatha kupangitsa kuti mawonekedwewo aipire.
Njira zambiri zamakina zimakhala ndi kulolerana pakati pa +/-.005 ndi +/-.010.Zingwe zodula zowona mpaka kutalika, komabe, nthawi zambiri zimakhala +/-.030 popeza kuchuluka kwamphamvu kwa mzere wamatenthedwe akuwonjezera ndi kutsika kwa UHMW-PE kumapangitsa kutalika kwa chidutswa kukhala pachiwopsezo cha kusintha kwa chilengedwe.
Machining Njira
Kucheka: Pamacheka ozungulira, masamba okhala ndi nsonga ya carbide amapereka zotsatira zabwino kwambiri.Tsamba la 12-14 "diameter liyenera kukhala ndi mano pafupifupi 24.Kuthamanga kwa chakudya kumatha kuchoka pa 10 mpaka 40 mapazi pamphindi.Kwa gulu locheka masamba okhala ndi mano atatu pa inchi imodzi, raker set ndi angelo owoneka bwino amalimbikitsidwa.Kuthamanga kwa chakudya kumachokera ku 10 mpaka 40 mapazi pa mphindi.
Kutembenuka: Gwiritsani ntchito zida zachitsulo zothamanga kwambiri zokhala ndi chilolezo cha 10 "kutsogolo ndi m'mbali ndi 15-30" chowotcha.Kuthamanga kwapansi kwapakati pa 600 ndi 1,000 mapazi pamphindi kumafunika.Komabe, nthawi zambiri pamafunika kuthamanga mothamanga kwambiri kuti tchipisi tisakhale ndi makina.Kudula madzi sikuyenera kukhala kofunikira, koma kuphulika kwa mpweya woponderezedwa nthawi zina kumathandiza kuchotsa chip.Mukayesa kukwaniritsa kulolerana kwapafupi kapena gawo lochepa kwambiri lokhala ndi mipanda mu UHMW-PE, makina amadutsa.Chotsani zinthu zambiri pachiphaso choyamba, kenaka chikani chidutswacho ndikupumula usiku wonse.
Kugaya: Odula opangidwa kuti azipanga aluminiyamu amapereka zotsatira zabwino kwambiri.Kudula liwiro la 600 mpaka 1,800 mapazi pamphindi akulangizidwa, ndi kudyetsedwa kwa pafupifupi mainchesi 0.01 pakusintha kulikonse.Zingwe za rauta zimagwira ntchito bwino polowera komanso mphero yopepuka.
Kukonzekera: Okonza matabwa amachepetsa mosavuta makulidwe ndi kuwona pamwamba pa UHMW-PE.Makina owuma okhala ndi masamba akuthwa amakupatsani mwayi wochotsa masheya ndikumaliza bwino.Kuti muchepetse kuthekera kopindika mukamapanga UHMW-PE, tambani theka la makulidwe omwe mukufuna kuchokera mbali iliyonse ya pepala.
Kubowola: Zobowola zothamanga kwambiri ndizokwanira pakubowola ambiri.Kuti mugwire bwino ntchito, gwiritsani ntchito kubowola kwapadera kwa helix komwe kumakhala ndi zitoliro zopukutidwa.Kubowola mabowo oyendetsa musanayambe kubowola dzenje lalikulu sikovomerezeka kwa UHMW-PE, chifukwa mawonekedwe ake amachititsa kuti kubowolako kugwire ndikudzikoka kukhala zinthu.
Kugwetsa/Kutsuka Mchenga: Chifukwa cha mphamvu yolimbana ndi abrasion ya UHMW-PE, kupera ndi mchenga nthawi zambiri sizigwira ntchito.M'malo mwake, kugaya kungapangitse kuti zinthuzo zisungunuke ndi kuzipaka, zomwe zimapangitsa kuti gudumu lophwanyira litseke.
UHMW-PE kusinthidwa ndi zowonjezera monga galasi kapena zitsulo oxides zimabweretsa moyo waufupi wa zida.Ngakhale zida za carbide zidzawonjezera moyo ku chida, zimafunikira kuthamanga kwambiri komanso chakudya.Zida zina zokhala ndi zowonjezera zowonjezera zowonjezera zimakhala zovuta kuzipanga mwa njira iliyonse.
Kupanga ndi kuwotcherera
UHMW-PE ikhoza kukhala yotentha pa ntchito kuti ipange ma bend osavuta ndi ma angles omwe amathandizira kukhazikitsa.Ziribe kanthu kuti ndi njira iti yomwe yasankhidwa - nyali, chowotcha chamagetsi, uvuni kapena kusamba - chenjezo liyenera kugwiritsidwa ntchito ndikuyesetsa kuti musatenthetse zinthuzo.UHMW-PE, monga mapulasitiki aliwonse, amawotcha pansi pamikhalidwe yosayenera.Kuphatikiza apo, kuzizira kwathunthu kudzakhala kotalika pang'ono kuposa kutenthetsa chifukwa cha kutentha kwambiri kwa UHMW-PE.Kuziziritsa sikuyenera kuchitika pa konkire kapena zitsulo chifukwa njirayi idzakhala yofulumira kwambiri ndipo ikhoza kuyambitsa kupanikizika kowonjezera muzinthu.Lingaliro linanso ndikuphimba zinthuzo ndi bulangeti lotsekera lopangidwa kuchokera ku zinthu monga fiberglass.
UHMW-PE yomwe imakhala yozizira imagwiritsidwa ntchito nthawi zambiri pakafunika kokwanira ma curve ndi ngodya.Kaya mukugwiritsa ntchito makina osindikizira a brake, kugudubuza, kupanga manja kapena kugwiritsa ntchito mabawuti kujambula ndi kupanga chidutswacho pamalo ake, ngodya ndi ma curve ziyenera kupindika kwambiri ndi 75 mpaka 100 peresenti kuti zithandizire kuyambiranso kwa UHMW-PE.Kuthekera kwa ming'alu ya kupsinjika kumatha kuchepetsedwa pogwiritsa ntchito mapepala 3/8 "kapena ocheperako popanga kuzizira.
Kuwotcherera kwa spin kapena frictional kungapezeke pogwiritsa ntchito makina opangira makina omwe amatha 550 mpaka 560 rpm ndi mphamvu yosiya kutembenuza nthawi yomweyo brake ikugwiritsidwa ntchito, ndi mbale yosungira zitsulo ya ¼ ”chitsulo, yokhala ndi m'mimba mwake yocheperako pang'ono kuposa flange. OD.Kuwotcherera kotereku kumafunika maola 48 kuti crystallize bwino chitoliro chisanayambe kugwira ntchito.
Butt, kapena otentha mbale wilding kuti agwirizane mapepala lathyathyathya mu zidutswa zazitali kapena koyilo, amafuna kugwiritsa ntchito zitsulo Kutentha chida, TACHIMATA ndi sanali ndodo wothandizila, wokhoza kufika kutentha koyenera kubweretsa polima ku dziko losungunuka.Izi zimafuna kugwiritsa ntchito zida zapadera zakutchire kuti mukwaniritse zowotcherera yunifolomu ndi mphamvu yapakati pa 85 ndi 100 peresenti ya mphamvu zoyambira zakuthupi.
Zomatira
Kutsika kocheperako kwa kukangana, kopanda porous pamwamba pa UHMW-PE kumapangitsa kukhala kovuta kuti zomatira zilowe mu polima ndikupanga chomangira.Funsani wopereka zomatira wanu kuti mupeze njira zomwe mungagwirizanitse UHMW-PE ku magawo osiyanasiyana, ngakhale zomangira zamakina ndizovomerezeka pazogwiritsa ntchito zambiri.
Nthawi yotumiza: Jan-24-2018