Menya neza ko byumye
Nylon ni hygroscopique, iyo ihuye nikirere igihe kirekire, izakurura amazi mu kirere.Ubushyuhe buri hejuru yo gushonga (hafi 254 ° C), molekile zamazi zifata imiti hamwe na nylon.Iyi reaction ya chimique, yitwa hydrolysis cyangwa cleavage, okiside nylon ikayihindura amabara.Uburemere bwa molekuline hamwe no gukomera kwa resin biragabanuka cyane, kandi amazi ariyongera.Ubushuhe bwakiriwe na plastike na gaze yacitse mubice bifatanye, urumuri ruba hejuru ntirworoshye, ingano ya feza, udusimba, microspores, ibibyimba, kwaguka gushonga ntigushobora gushingwa cyangwa gushingwa nyuma yimbaraga za mashini zagabanutse cyane.Hanyuma, nylon yatunganijwe niyi hydrolysis ntishobora kwemerwa rwose kandi ntishobora kongera gukoreshwa nubwo yongeye gukama.
Ibikoresho bya Nylon mbere yo gutera inshinge ibikorwa byo kumisha bigomba gufatanwa uburemere, kugirango byumuke kugeza kurwego rusabwa nibicuruzwa byarangiye kugirango uhitemo, mubisanzwe 0,25% munsi, byari byiza kutarenza 0.1%, mugihe cyose ibikoresho byumye byumye, kubumba inshinge ni byoroshye, ibice ntibizazana ibibazo byinshi kumiterere.
Nylon yari afite uburyo bwiza bwo gukama vacuum, kubera ko ubushyuhe bwubushyuhe bwumuyaga mwuka bwikirere buri hejuru, ibikoresho fatizo bigomba gukama biracyahari guhura na ogisijeni mu kirere kandi birashoboka ko amabara ya okiside ihinduka, okiside ikabije nayo izagira ingaruka zinyuranye, bityo ko umusaruro wavunitse.
Mugihe habuze ibikoresho byo kumisha vacuum, kumisha ikirere birashobora gukoreshwa gusa, nubwo ingaruka ari mbi.Hariho amagambo menshi atandukanye kumiterere yikirere, ariko hano hari bike.Iya mbere ni 60 ℃ ~ 70 ℃, uburebure bwibikoresho 20mm, guteka 24h ~ 30h;Iya kabiri ntabwo irenze 10h iyo yumye munsi ya 90 ℃;Iya gatatu iri kuri 93 ℃ cyangwa munsi yayo, yumisha 2h ~ 3h, kubera ko mubushyuhe bwikirere burenga 93 ℃ no gukomeza 3h hejuru, birashoboka guhindura ibara rya nylon, bityo ubushyuhe bugomba kugabanuka kugera kuri 79 ℃;Iya kane ni ukongera ubushyuhe burenga 100 ℃, cyangwa na 150 ℃, kubera ko harebwa nylon guhura n'umwuka igihe kirekire cyangwa kubera imikorere mibi y'ibikoresho byumye;Icya gatanu ni imashini ibumba imashini ishushe yumye, ubushyuhe bwumuyaga ushyushye muri hopper yazamutse kugeza munsi ya 100 ℃ cyangwa irenga, kugirango ubuhehere buri muri plastike bugume.Noneho umwuka ushyushye ujyanwa hejuru ya hopper.
Niba plastiki yumye igaragara mu kirere, izahita ikurura amazi mu kirere kandi itakaza ingaruka zo kumisha.Ndetse no mumashini itwikiriye imashini, igihe cyo kubika ntigikwiye kuba kirekire, mubisanzwe ntabwo kirenze isaha 1 muminsi yimvura, iminsi yizuba igarukira kumasaha 3.
Kugenzura ubushyuhe bwa barriel
Ubushyuhe bwa Nylon buri hejuru, ariko iyo bigeze aho bishonga, ubukonje bwabwo buri munsi cyane ya termoplastique rusange nka polystirene, kubwibyo gukora amazi ntabwo ari ikibazo.Byongeye kandi, kubera imiterere ya rheologiya ya nylon, ubwiza bugaragara buragabanuka mugihe igipimo cyogosha cyiyongereye, kandi ubushyuhe bwo gushonga bugabanuka, hagati ya 3 ℃ na 5 ℃, ubushyuhe bwibintu rero ni garanti yuzuye neza.
Ariko nylon muburyo bwo gushonga mugihe ubushyuhe bwumuriro bumeze nabi, gutunganya ibintu byinshi cyane biringaniye igihe kirekire cyo gushyushya bishobora gutuma polymer yangirika, kuburyo ibicuruzwa bigaragara nkibibyimba, imbaraga zigabanuka.Kubwibyo, ubushyuhe bwa buri gice cya barrale bugomba kugenzurwa cyane, kugirango pellet mubushyuhe bwinshi bwo gushonga, ibihe byo gushyuha birumvikana nkibishoboka, bimwe bimwe, kugirango birinde gushonga nabi hamwe nubushyuhe bukabije bwaho.Kubijyanye no kubumba byose, ubushyuhe bwa barrale ntibugomba kurenga 300 and, kandi igihe cyo gushyushya pellet muri barrale ntigomba kurenza 30min.
Ibikoresho byongerewe ibikoresho
Iya mbere ni uko ibintu bimeze muri barriel, nubwo hari ibintu byinshi byatewe inshinge imbere, ariko ihindagurika ryibintu byashongeshejwe mumashanyarazi no kumeneka hagati yisura yanyuma ya screw nurukuta rwimbere rwikigina na rwo rwiyongera. kubera ubwinshi bwamazi, butagabanya gusa umuvuduko wogutera inshinge nubunini bwibiryo, ariko kandi rimwe na rimwe bikabangamira iterambere ryiza ryo kugaburira, kugirango umugozi udashobora gusubira inyuma.Kubwibyo, cheque loop igomba gushyirwaho imbere ya barriel kugirango wirinde gusubira inyuma.Ariko nyuma yo gushiraho impeta, ubushyuhe bwibintu bugomba kwiyongeraho 10 ℃ ~ 20 ℃, kugirango igihombo gishobora kwishyurwa.
Iya kabiri ni nozzle, igikorwa cyo gutera inshinge kirarangiye, umugongo usubira inyuma, ushongeshejwe mu itanura ryimbere munsi yumuvuduko usigaye urashobora kuva muri nozzle, ni ukuvuga icyo bita "salivation phenomenon".Niba ibikoresho bigomba gusukwa mu cyuho bizatuma ibice bifite ibibanza bikonje cyangwa bigoye kuzuza, niba nozzle irwanya ifu mbere yo kuyikuraho, kandi byongereye cyane imikorere yikibazo, ubukungu ntabwo buhenze.Nuburyo bwiza bwo kugenzura ubushyuhe bwa nozzle mugushiraho impeta yo gushyushya itandukanijwe itandukanye kuri nozzle, ariko uburyo bwibanze nuguhindura nozzle hamwe nisoko ya mwobo wa valve nozzle.Birumvikana ko ibikoresho byamasoko bikoreshwa nubu bwoko bwa nozzle bigomba kwihanganira ubushyuhe bwo hejuru, bitabaye ibyo bizatakaza ingaruka zabyo byoroshye kubera kwikuramo inshuro nyinshi ubushyuhe bwinshi.
Menya neza ko bipfa gupfa no kugenzura ubushyuhe bwo gupfa
Kubera ahantu harehare cyane ya nylon, nayo, aho ikonjesha nayo iri hejuru, ibikoresho byo gushonga mubukonje burashobora gukomera igihe icyo aricyo cyose bitewe nubushyuhe bwo kugwa munsi yumushonga, bikabuza kurangiza ibikorwa byo kuzuza ibumba , bityo inshinge yihuta igomba gukoreshwa, cyane cyane kubice bikikijwe neza cyangwa ibice birebire bitemba.Byongeye kandi, umuvuduko mwinshi wuzuza nanone uzana ikibazo cyimyuka ya cavity, ifu ya nylon igomba kuba ifite ingamba zihagije zo gusohora.
Nylon ifite ubushyuhe bwo gupfa burenze ubushyuhe bwa rusange.Muri rusange, ubushyuhe bwo hejuru ni bwiza kubitemba.Ni ngombwa cyane kubice bigoye.Ikibazo nuko igipimo cyo gukonjesha gushonga nyuma yo kuzuza urwobo bigira ingaruka zikomeye kumiterere nimiterere yibice bya nylon.Ahanini iri muri kristu yayo, iyo iri mubushyuhe bwo hejuru mumiterere ya amorphous yinjira mu kavuyo, kristu yatangiraga, ubunini bwikigereranyo cyo gutondekanya ibintu biterwa nubushyuhe bwo hejuru kandi buke buke hamwe nubushyuhe bwo kohereza ubushyuhe.Iyo ibice bito bifite uburebure burebure, bisabwa gukorera mu mucyo no gukomera, ubushyuhe bwububiko bugomba kuba buke kugirango bigabanye urugero rwa kristu.Iyo urukuta runini rufite ubukana bwinshi, kurwanira kwambara neza no guhindura ibintu bito bikoreshwa, ubushyuhe bwububiko bugomba kuba hejuru kugirango wongere urwego rwo korohereza.Ubushyuhe bwa Nylon burakenewe cyane, ibi ni ukubera ko igipimo cyacyo cyo kugabanuka ari kinini, iyo gihindutse kiva mumashanyarazi gushika kugabanuka kwa leta nini cyane, cyane cyane kubicuruzwa byurukuta rwinshi, ubushyuhe bwibumba ni buke cyane bizatera icyuho cyimbere.Gusa iyo ubushyuhe bwububiko bugenzuwe neza birashobora kuba ubunini bwibice bihagaze neza.
Ubushyuhe bwo kugenzura ubushyuhe bwa nylon ni 20 ℃ ~ 90 ℃.Nibyiza kugira byombi bikonjesha (nkamazi ya robine) hamwe nubushyuhe (nkibikoresho byo gucomeka amashanyarazi).
Annealing hamwe nubushuhe
Kugirango ukoreshe ubushyuhe burenze 80 ℃ cyangwa ibisabwa byuzuye kubice, nyuma yo kubumba bigomba gushirwa mumavuta cyangwa paraffine.Ubushyuhe bwa annealing bugomba kuba 10 ℃ ~ 20 ℃ hejuru yubushyuhe bwa serivisi, kandi igihe kigomba kuba nka 10min ~ 60min ukurikije ubunini.Nyuma ya annealing, igomba gukonjeshwa buhoro.Nyuma yo kuvura no gushyushya ubushyuhe, kirisiti nini ya nylon irashobora kuboneka, kandi gukomera biratera imbere.Ibice bya kristu, impinduka yubucucike ni nto, ntabwo ihindagurika no guturika.Ibice byashizweho nuburyo bukonje butunguranye bifite kristu ntoya, kristu ntoya, gukomera gukabije no gukorera mu mucyo.
Ongeramo nucleating agent ya nylon, gushushanya inshinge birashobora kubyara kristu nini ya kirisiti, irashobora kugabanya uruziga, inshusho nubukomezi bwibice byatejwe imbere.
Imihindagurikire y’ibidukikije irashobora guhindura ubunini bwibice bya nylon.Igipimo cya Nylon ubwacyo kiri hejuru, kugirango gikomeze kuba cyiza cyane, gishobora gukoresha amazi cyangwa igisubizo cyamazi kugirango gitange imiti itose.Uburyo nugushira ibice mumazi abira cyangwa potassium acetate yumuti wamazi (igipimo cya acetate ya potasiyumu namazi ni 1.25: 100, aho batekera 121 ℃), igihe cyo gushiramo biterwa nuburebure bwurukuta runini rwibice, 1.5mm 2h , 3mm 8h, 6mm 16h.Kuvura ubushuhe birashobora kunoza imiterere ya kristu ya plastike, kunoza ubukana bwibice, no kunoza ikwirakwizwa ryimyitwarire yimbere, kandi ingaruka nibyiza kuruta kuvura.
Igihe cyo kohereza: 03-11-22