I-Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) isethi engaphansi ye-thermoplastic polyethylene.Eyaziwa nangokuthi i-high-modulus polyethylene, (HMPE), ...
I-Ultra High Molecular Weight polyethylene (UHMW-PE) iyi-thermoplastic yobunjiniyela enesisindo semolekyuli esikhulu kuno-3.1 AMUs (amayunithi esisindo se-athomu).Isisindo samangqamuzana aphezulu sithuthukisa inani lezinto ezibonakalayo ezibalulekile, hhayi okungenani okuwukumelana okuvelele kokuhuzuka, amandla omthelela aphezulu kanye ne-coefficient ephansi yokungqubuzana.Ngaphezu kwalokho, i-polymer inokumelana okuhle kwamakhemikhali, izici ezinhle kakhulu zokudambisa umsindo, izakhiwo eziphakeme ze-dielectric kanye ne-insulating kagesi futhi ayimumbi umswakama.
Lezi zakhiwo, zihlangene nokulula komshini, zenza i-UHMW-PE, into engabizi kakhulu ehlangabezana nezidingo ze-FDA kanye ne-USDA yokuxhumana ngqo nokudla, isetshenziswa kakhulu ezimbonini zokudla, iziphuzo, zezokwelapha nezemithi.Ikhwalithi engeyona i-UHMW-PE ivimbela ukukhula kwesikhunta noma amagciwane.I-UHMW-PE iphinde isetshenziswe kabanzi ezimbonini zendwangu, ukucubungula amakhemikhali, i-pulp nephepha, izimayini, olwandle, insimbi, amanzi nokuthuthwa kwendle, ukuphatha impahla ngobuningi kanye nezimboni zezolimo.
Izakhiwo ze-UHMW-PE zingathuthukiswa ngokusebenzisa izithasiselo ezifana nama-colorants, i-UV nezinzinzisi zokushisa, ama-anti-static agents, izihlungi ezingagugi kanye nezinto zokugcoba ezinciphisa ukungqubuzana.Izinsimbi noma ama-ores angasetshenziswa ukukhulisa isisindo futhi enze i-polymer ibonakale ngozibuthe, kuyilapho enye i-filler inyusa izinga lokushisa lokusebenza kwemvelo.
Ngenxa yokuthi i-UHME-PE iyi-polymer e-semi-crystalline, kufanele inikwe ngokubunjwa kokuminyanisa noma i-ram extrusion.I-Annealing, ngaphambi komshini, isiza ukususa ukucubungula okucindezelwe okubangelwa ukucwiliswa.Izingxenye eziqediwe zomshini nazo zingabanjwa, kodwa lezo zingxenye kufanele zilungiswe phakathi nenqubo yokupholisa ukuze zivumele ukuncipha ngesikhathi sokudonsa.Ukukhanda imishini kufanele kwenziwe ngaphambi kokudambisa ingcindezi ukuze izinguquko ezinobukhulu zikwazi ukwamukela ngesikhathi sokusebenza kokugcina.
Itholakala kumashidi ajwayelekile, izinduku, namashubhu okukhiqiza izingxenye ezizinzile ezinobukhulu, i-UHMW-PE ingasaha, igaywe, iguqulwe, ihlelwe, ibholwe noma igxotshwe.Amathuluzi okusika kufanele abe nama-engeli aphezulu kanye nemvume eyanele yomkhumbi ukuvimbela ukuvinjelwa.Izinga lokuphakelayo kufanele libe phezulu ukuze isikhathi esincane sivunyelwe ukuze ithuluzi lokusika lishise impahla ngokungqubuzana.Kufanele kuqashelwe ukuze kugcinwe amathuluzi ebukhali ngoba i-UHMW-PE ingakwazi ukufiphaza ngokushesha amaphethelo okusika amathuluzi, ibangele ukuhlanekezela kwengxenye.Ukuqedwa kwekhwalithi ephezulu kungatholakala ngokusebenzisa amathuluzi okusika afanelekile, nakuba imizamo yokuthuthukisa ukuqedwa okungalungile ngokufaka noma ngokufaka isihlabathi ngokuvamile kuzoholela ekulimazeni ukubukeka.
Izinqubo eziningi zomshini zibamba ukubekezelelana phakathi kuka-+/-.005 kanye no-+/-.010.Imigqa yokusika i-Saw ibe ubude, nokho, ngokuvamile ingaba ngu-+/-.030 njengoba izinga eliphezulu lokunwetshwa komugqa oshisayo nokufinyela kwe-UHMW-PE lenza ubude besiqephu sibe sengcupheni yezinguquko zemvelo.
Izinqubo Zomshini
Ukusaha: Ngokusaha okuyindilinga, izindwani ezinesihloko se-carbide zinikeza imiphumela engcono kakhulu.I-blade engu-12-14” ububanzi kufanele ibe namazinyo acishe abe ngu-24.Izivinini zokuphakelayo zingasukela ku-10 kuye ku-40 wamafidi ngomzuzu.Ngokusaha i-blade enamazinyo amathathu iyintshi ngayinye, kunconywa isethi ye-raker kanye ne-positive rake angel.Izivinini zokuphakelayo zisukela ku-10 kuye ku-40 wamafidi ngomzuzu.
Ukuphenduka: Sebenzisa izingcezu zamathuluzi ensimbi ezinesivinini esikhulu ezino-10” ngaphambili nangaseceleni kanye neraki elingu-15-30”.Isivinini sokusika esiphansi esiphakathi kwamafithi angu-600 no-1,000 ngomzuzu siyadingeka.Kodwa-ke, kuvame ukudingekile ukugijima nge-rpm ephezulu ukuze ugcine ama-chips ecacile emshinini.Ukusika uketshezi akufanele kudingeke, kodwa ukuqhuma komoya ocindezelwe ngezinye izikhathi kuzosiza ekukhipheni ama-chip.Lapho uzama ukuthola ukubekezelelana okuseduze noma ingxenye encane ebiyelwe ngodonga ku-UHMW-PE, umshini uyadlula.Susa izinto eziningi kuphasi lokuqala, bese uvumela ucezu luhlale futhi luphumule ubusuku bonke.
Ukugaya: Izisiki eziklanyelwe ukwenza i-aluminium machining zinikeza imiphumela engcono kakhulu.Isivinini sokusika esingamafidi angu-600 ukuya kwangu-1,800 ngomzuzu siyaphakanyiswa, ngesilinganiso esiphakelwayo esingaba amayintshi angu-0.01 inguquko ngayinye.Ama-router bits asebenza kahle ekugayweni nasekugayweni okukhanyayo.
Ukuhlela: Abaklami bezinkuni banciphisa kalula ukujiya kanye nokweqiniso kobuso be-UHMW-PE.Umshini oqinile onama-blade acijile uzonikeza ukukhishwa kwesitoko okuphumelelayo kakhulu nokuqeda kahle kwendawo.Ukuze unciphise amandla okujika lapho wenza i-UHMW-PE, yenza uhhafu wogqinsi olufunekayo kusukela ohlangothini ngalunye lweshidi.
Ukubhoboza: Izimbobo ezijwayelekile zejubane eliphezulu zanele ezinhlelweni eziningi zokumba.Ukuze usebenze kahle, sebenzisa imishini ekhethekile ephansi ye-helix enemitshingo ephucuziwe.Ukubhoboza izimbobo zokulinga ngaphambi kokubhoboza imbobo enkulu akunconyiwe ku-UHMW-PE, ngoba izakhiwo zayo zenza ukuthi i-drill ibambe futhi idonse yona ibe yinto ebonakalayo.
Ukugaya/Ukufaka isihlabathi: Ngenxa yezindawo ze-UHMW-PE ezikwazi ukumelana nokuhuzuka, ukugaya nokufaka isihlabathi ngokuvamile kungasebenzi.Eqinisweni, ukugaya kungase kubangele ukuba izinto zincibilike futhi zigcobe, kubangele isondo lokugaya elivalekile.
I-UHMW-PE elungiswe ngezithasiselo ezifana nengilazi noma i-metallic oxide izoholela ekuphileni kwamathuluzi okufushane.Nakuba amathuluzi e-carbide azokwengeza ukuphila ethuluzini, kudinga isivinini esikhulu kanye nokudla.Ezinye izinto ezinephesenti eliphezulu kakhulu lezithasiselo ezilumayo azikwazi ukwenziwa ngomshini nganoma iyiphi indlela.
Ukwakha kanye Welding
I-UHMW-PE ingashisa kakhulu emsebenzini ukuze yenze ama-engeli alula nama-engeli afaka kalula.Kungakhathaliseki ukuthi iyiphi indlela ekhethiwe - ithoshi, i-heater kagesi, ihhavini noma ukugeza - ukuqapha kufanele kusetshenziswe futhi kwenziwe yonke imizamo ukuze ingashisi kakhulu impahla.I-UHMW-PE, njenganoma yimaphi amapulasitiki, izosha ngaphansi kwezimo ezingafanele.Ngaphezu kwalokho, umjikelezo wokupholisa ophelele uzoba mude ngandlela thize kunomjikelezo wokushisisa ngenxa yezimpawu zokugcinwa kokushisa okuphezulu kwe-UHMW-PE.Ukupholisa akufanele kwenzeke endaweni ekhonkolo noma yensimbi ngoba inqubo izoshesha kakhulu futhi ingase yethule ingcindezi eyengeziwe ezintweni.Isincomo esengeziwe siwukumboza impahla ngengubo yokufihla ikhanda eyenziwe ngezinto ezifana ne-fiberglass.
I-UHMW-PE ebandayo ivame ukusetshenziswa uma kunesidingo sokuhlanganisa amajika nama-engeli.Kungakhathaliseki ukuthi usebenzisa i-brake press, rolling, handforming noma ukusebenzisa amabhawodi ukuze udwebe futhi wenze ucezu endaweni, i-engeli namajika kufanele kugotshwe kakhulu ngamaphesenti angu-75 kuya kwangu-100 ukuze kunxeshezelwe umphumela we-springback we-UHMW-PE.Amandla okuqhekeka kwengcindezi angancishiswa ngokusebenzisa amashidi angu-3/8” noma abe mncane lapho akha amakhaza.
I-spin noma i-frictional welding ingafinyelelwa kusetshenziswa i-lathe yomshini evamile ekwazi u-550 kuya ku-560 rpm enekhono lokuyeka ukujika ngokushesha lapho kufakwa ibhuleki, kanye nepuleti eliyisipele lensimbi lensimbi engu-¼”, enobubanzi obungaphansi kancane kwe-flange. OD.Lolu hlobo lwe-weld ludinga amahora angu-48 wokucwebezela ngokugcwele ngaphambi kokuba ipayipi lifakwe emsebenzini.
I-Butt, noma i-hot plate wilding ukuze ihlanganise amashidi ayisicaba abe yizicucu ezinde noma amakhoyili, kudinga ukusetshenziswa kwethuluzi lokushisisa lensimbi, elimbozwe nge-ejenti engagxili, ekwazi ukufinyelela izinga lokushisa elidingekayo ukuze ilethe i-polymer esimweni sokuncibilika.Le nqubo idinga ukusetshenziswa kwemishini ekhethekile yasendle ukuze kuzuzwe ukushiselwa okufanayo ngamandla aphakathi kuka-85 no-100 wamaphesenti wamandla ezinto zangempela.
Izinamathiselo
I-coefficient ephansi yokungqubuzana, indawo engenazimbobo ye-UHMW-PE yenza kube nzima nganoma iyiphi into enamathelayo ukuthi ingene ku-polymer futhi yakhe isibopho.Xhumana nomhlinzeki wakho wokunamathisela ukuze uthole izinqubo ezinconyiwe zokuhlanganisa i-UHMW-PE kuma-substrates ahlukahlukene, nakuba izibophelelo eziyimishini zinconywa ezinhlelweni eziningi.
Isikhathi sokuthumela: Jan-24-2018