Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) wani yanki ne na polyethylene thermoplastic.Hakanan aka sani da high-modulus polyethylene, (HMPE),…
Ultra High Molecular Weight polyethylene (UHMW-PE) wani thermoplastic injiniya ne tare da nauyin kwayoyin halitta fiye da 3.1 AMUs (raka'o'in nau'in atomic).Babban nauyin kwayoyin halitta yana haɓaka adadin mahimman kaddarorin jiki, ba ƙaramin abin da ke ba da juriya na abrasion ba, ƙarfin tasiri mai ƙarfi da ƙarancin ƙima.Bugu da ƙari, polymer yana da kyakkyawan juriya na sinadarai, kyawawan halaye masu lalata sauti, mafi kyawun dielectric da kayan insulating na lantarki kuma baya sha danshi.
Wadannan kaddarorin, a hade tare da sauƙi na machining, suna yin UHMW-PE, wani abu mai tsada wanda ya dace da bukatun FDA da USDA don hulɗar abinci kai tsaye, ana amfani dashi sosai a cikin masana'antun abinci, abin sha, likita da magunguna.Ingantacciyar ƙarancin UHMW-PE tana hana haɓakar naman gwari ko ƙwayoyin cuta.Hakanan ana amfani da UHMW-PE sosai a cikin yadi, sarrafa sinadarai, ɓangaren litattafan almara da takarda, ma'adinai, ruwa, ƙarfe, ruwa da kula da najasa, sarrafa kayan da yawa da masana'antar noma.
Ana iya haɓaka kaddarorin UHMW-PE ta hanyar amfani da abubuwan ƙari kamar masu canza launi, UV da masu daidaita zafi, wakilai na anti-static, masu jure lalacewa da mai mai rage gogayya.Ana iya amfani da karafa ko ma'adinai don ƙara nauyi da kuma sanya polymer magnetically ganowa, yayin da sauran filler suna ƙara yawan zafin aiki na muhalli.
Saboda UHME-PE polymer Semi-crystalline, dole ne a sanya shi ta hanyar gyare-gyaren matsawa ko extrusion rago.Annealing, kafin yin inji, yana taimakawa wajen kawar da damuwa da ke haifar da sintering.Hakanan za'a iya goge sassan da aka gama na'ura, amma irin waɗannan sassan dole ne a daidaita su yayin aikin sanyaya don ba da damar raguwa yayin cirewa.Kamata ya yi a yi aikin injina mai kauri kafin a kawar da damuwa ta yadda za a iya daidaita sauye-sauyen girma yayin injina na ƙarshe.
Akwai a cikin daidaitattun zanen gado, sanduna, da bututu don samar da sassa masu tsayin tsayi, UHMW-PE za a iya saƙa, niƙa, juya, shiryawa, hakowa ko naushi.Kayan aikin yanke yakamata su kasance da manyan kusurwar rake da isassun izinin jirgi don hana toshewa.Ya kamata farashin ciyarwa ya kasance mai girma ta yadda za a ba da damar mafi ƙarancin lokaci don kayan aikin yankan don dumama kayan ta hanyar gogayya.Yakamata a kula don kiyaye kayan aikin kaifi saboda UHMW-PE na iya saurin yanke kayan aikin yankan gefuna, haifar da ɓarna.Za'a iya samun kammalawar inganci mai inganci ta amfani da kayan aikin yankan da suka dace, kodayake yunƙurin inganta ƙarancin ƙarewa ta hanyar yin rajista ko yashi gabaɗaya zai haifar da ƙarar bayyanar.
Yawancin hanyoyin sarrafa injin suna ɗaukar haƙuri tsakanin +/-.005 da +/-.010.Ganin yankan tsiri zuwa tsayi, duk da haka, yawanci zai zama +/-.030 tun da daidaitaccen ƙimar faɗaɗawar thermal mai faɗi da ƙanƙancewa UHMW-PE yana sa tsayin yanki ya zama mai rauni ga canje-canjen muhalli.
Hanyoyin sarrafa injina
Sawing: Don madauwari sawing, carbide-tipped ruwan wukake suna ba da sakamako mafi kyau.Ruwan diamita na 12-14 ” yakamata ya kasance yana da kusan hakora 24.Gudun ciyarwa na iya zuwa daga ƙafa 10 zuwa 40 a cikin minti ɗaya.Don ƙwanƙwasa igiya mai hakora uku a kowace inch, ana ba da shawarar saitin raker da mala'ikan rake tabbatacce.Gudun ciyarwa yana daga ƙafa 10 zuwa 40 a cikin minti ɗaya.
Juyawa: Yi amfani da kayan aikin ƙarfe mai sauri tare da 10 "gaba da share gefe da 15-30" rake.Ana buƙatar ƙananan saurin yanke tsakanin ƙafa 600 zuwa 1,000 a cikin minti ɗaya.Duk da haka, sau da yawa ya zama dole don gudu a mafi girma rpm don kiyaye kwakwalwan kwamfuta daga na'ura.Yanke ruwa bai kamata ya zama dole ba, amma fashewar iska mai matsawa wani lokaci zai taimaka wajen cire guntu.Lokacin ƙoƙarin cimma kusancin haƙuri ko ɓangaren bangon bakin ciki sosai a cikin UHMW-PE, injin yana wucewa.Cire mafi yawan kayan a kan wucewar farko, sannan bari yanki ya zauna ya huta na dare.
Milling: Yankan da aka ƙera don sarrafa aluminum suna ba da sakamako mafi kyau.Ana ba da shawarar yanke saurin ƙafa 600 zuwa ƙafa 1,800 a cikin minti ɗaya, tare da ƙimar ciyarwar kusan inci 0.01 a kowane juyin juya hali.Na'ura mai ba da hanya tsakanin hanyoyin sadarwa suna aiki da kyau don yin ramuka da niƙa mai haske.
Tsara: Masu tsara katako suna rage kauri da gaskiya sama da saman UHMW-PE.M inji tare da kaifi ruwan wukake zai ba da sosai m stock cire da kyau surface gama.Don rage yuwuwar yin warwas yayin yin aikin UHMW-PE, jirgin sama rabin kauri da ake so daga kowane gefen takardar.
Hakowa: Matsalolin gaggawa na al'ada sun isa ga yawancin aikace-aikacen hakowa.Don ingantacciyar aiki, yi amfani da ƙwanƙwasa ƙananan heliks na musamman tare da gogaggen sarewa.Hako ramukan matukin jirgi kafin a hako babban rami ba a ba da shawarar UHMW-PE ba, saboda kaddarorinsa suna sa rawar ta kama ta kuma jawo kanta cikin abu.
Nika/Yashi: Saboda kaddarorin juriya na UHMW-PE, niƙa da yashi yawanci ba su da tasiri.A haƙiƙa, niƙa na iya sa kayan ya narke kuma ya shafa, yana haifar da toshe dabaran niƙa.
UHMW-PE da aka gyara tare da ƙari kamar gilashi ko oxides na ƙarfe zai haifar da gajeriyar rayuwar kayan aiki.Kodayake kayan aikin carbide za su ƙara rayuwa ga kayan aiki, yana buƙatar saurin gudu da ciyarwa.Wasu kayan da ke da kaso mai yawa na abubuwan da ke da alaƙa da abrasive ba su da amfani ga injina ta kowace hanya.
Samar da walda
UHMW-PE na iya zama mai zafi-kafa akan aikin don yin sauƙi mai sauƙi da kusurwoyi waɗanda ke sauƙaƙe shigarwa.Komai hanyar da aka zaba - tocila, wutar lantarki, tanda ko wanka - ya kamata a yi amfani da hankali kuma a yi ƙoƙari kada a yi zafi da kayan.UHMW-PE, kamar kowane robobi, zai ƙone a ƙarƙashin yanayin da bai dace ba.Bugu da kari, da cikakken sanyaya sake zagayowar zai zama ɗan tsayi fiye da dumama sake zagayowar saboda high zafi riƙe halaye na UHMW-PE.Bai kamata sanyi ya faru akan siminti ko ƙarfe ba saboda tsarin zai yi sauri kuma yana iya gabatar da ƙarin damuwa a cikin kayan.Ƙarin shawarwarin shine a rufe kayan tare da bargon rufi da aka yi daga wani abu kamar fiberglass.
Cold-forming UHMW-PE ana amfani dashi akai-akai lokacin da ake buƙatar dacewa da lanƙwasa da kusurwoyi.Ko yin amfani da latsa birki, mirgina, yin hannu ko amfani da ƙugiya don zana da samar da yanki a wurin, kwana da lanƙwasa dole ne a yi lankwasa da kusan kashi 75 zuwa 100 don rama sakamakon koma baya na UHMW-PE.Ana iya rage yuwuwar fashewar damuwa ta amfani da zanen gado 3/8” ko siriri lokacin sanyi.
Ana iya samun juzu'in walda ko juzu'i ta amfani da madaidaicin injin lathe mai iya 550 zuwa 560 rpm tare da ikon dakatar da juyawa nan take aka kunna birki, da farantin ajiyar ƙarfe na ¼” karfe, tare da diamita na ɗan ƙasa da flange. OD.Irin wannan weld ɗin yana buƙatar sa'o'i 48 na cikakken crystallize kafin a iya sanya bututun cikin sabis.
Butt, ko farantin zafi don haɗa zanen gado zuwa dogon guntu ko coils, yana buƙatar amfani da kayan aikin dumama ƙarfe, wanda aka lulluɓe da wakili mara sanda, wanda zai iya kaiwa madaidaicin zafin jiki don kawo polymer zuwa yanayin narkakkar.Wannan tsari yana buƙatar amfani da kayan aikin daji na musamman don cimma daidaitattun walda tare da ƙarfi tsakanin kashi 85 zuwa 100 na ƙarfin kayan asali.
Adhesives
Ƙarƙashin ƙaƙƙarfan juzu'i, farfajiyar da ba ta da ƙarfi ta UHMW-PE tana sa da wahala ga kowane abin ɗamara ya shiga cikin polymer kuma ya samar da haɗin gwiwa.Tuntuɓi mai siyar da ku don hanyoyin da aka ba da shawarar don haɗa UHMW-PE zuwa sassa daban-daban, kodayake ana ba da shawarar kayan aikin injin don yawancin aikace-aikace.
Lokacin aikawa: Janairu-24-2018