Qinisekisa ukoma
I-Nylon i-hygroscopic eyengeziwe, uma ivezwe emoyeni isikhathi eside, izodonsa umswakama emkhathini. Emazingeni okushisa angenhla kwephuzu lokuncibilika (cishe 254 ° C), ama-molecule wamanzi asabela ngamakhemikhali nge-nylon. Lokhu kusabela kwamakhemikhali, okubizwa nge-hydrolysis noma i-cleavage, oxidizes the nylon futhi ahlukane. Isisindo samangqamuzana nokuqina kwe-resin kubuthakathaka, futhi uketshezi luyanda. Umswakama odonswe yipulasitiki kanye negesi eqhekezeke ezingxenyeni ezihlanganyelwe, kwakhiwa ukukhanya ebusweni akulungile, okusanhlamvu kwesiliva, ama-sceck, ama-microspores, ukunwetshwa kwama-bubt ancibilikisiwe akunakusungulwa kakhulu. Ekugcineni, i-nylon enamathiselwe yile hydrolysis ingenakuqhathaniswa ngokuphelele futhi ayikwazi ukusetshenziswa futhi noma ngabe yomiswe kabusha.
Ukusebenza kwe-nylon ngaphambi kokusebenza kokukhomiswa kokukhohlisa kokukhwabanisa kufanele kuthathwe ngokungathi sína, ukuze kusome ngani ngezidingo zemikhiqizo eqediwe ukunquma, imvamisa i-0.15% ngezansi, inqobo nje uma kunesikhundla somile somile, inqobo nje Easy, izingxenye ngeke zilethe inkathazo enkulu ngekhwalithi.
I-nylon yayisebenzisa kangcono ukomisa i-vacuum, ngoba isimo sokushisa sokumiswa kwengcindezi emkhathini siphezulu, izinto ezivuthiwe zisezomiswa zisekhona oxhumana nomoya-mpilo emoyeni, futhi amathuba okusebenza nge-oxidation ngokweqile nawo azoba nomphumela ophambene, ngakho-ke ukuthi ukukhiqizwa kwe-brittle.
Uma kungekho imishini yokumisa ye-vacuum, ukomisa komkhathi kungasetshenziswa kuphela, yize umphumela umpofu. Kunemigomo eminingi ehlukile yezimo zokomisa emkhathini, kepha nakhu kumbalwa nje. Owokuqala uneminyaka engama-60 ℃ ~ 70 ℃, ukushuba okuphakathi kwezinto ezibonakalayo 20mm, Bhaka 24h ~ 30h; Okwesibili awekho ngaphezu kwe-10h lapho yomiswa ngaphansi kwama-90 ℃; Okwesithathu kungo-93 ℃ noma ngaphansi, ukomisa u-2h ~ 3h, ngoba ekushiseni komoya, ngoba okuqhubekayo kwe-3h ngenhla, ngakho-ke izinga lokushisa lingenhla, ngakho-ke izinga lokushisa kufanele lincishiswe libe ngu-79 ℃; Okwesine ukwandisa izinga lokushisa libe ngaphezu kwe-100 ℃, noma ngisho naku-150 ℃, ngenxa yokucatshangelwa kokuchayeka kwe-nylon emoyeni isikhathi eside noma ngenxa yokusebenza okungekuhle kwemishini yokumisa; Okwesihlanu yimishini yokubumba umshini oshisayo womoya we-hopper womoya, lokushisa komoya oshisayo ku-hopper likhuphuke njengengaphansi kwe-100 ℃ noma ngaphezulu, ukuze umswakama uphume ngopulasitiki. Lapho-ke umoya oshisayo uthathwa phezulu kwe-hopper.
Uma ipulasitiki eyomile ivezwa emoyeni, izodonsa ngokushesha amanzi emoyeni bese ilahlekelwa yimiphumela yokomisa. Ngisho nasem machine womshini we-hopper, isikhathi sesitoreji akufanele sibe yinde kakhulu, ngokuvamile hhayi ngaphezulu kwehora elingu-1 ezinsukwini zemvula, izinsuku zelanga zikhawulelwe emahoreni ama-3.
Lawula izinga lokushisa le-Barrel
Ukushisa okuncibilikayo kwe-nylon kuphakeme, kepha lapho ufinyelela endaweni yokuncibilika, ukubonakala kwawo kuphansi kakhulu kunama-thermoplastics ajwayelekile anjenge-polystyrene, ngakho-ke ukwakha u-fluodity akuyona inkinga. Ngaphezu kwalokho, ngenxa yezakhiwo ze-bheological ze-nylon, i-visa elibonakala liyancipha lapho isilinganiso se-shear sikhuphuka, futhi uhla lokushisa oluncibilikayo luncane, phakathi kwamazinga okushisa ama-3 ℃ no-5
Kepha i-nylon esimweni esincibilikayo lapho ukuzinza okushisayo kumpofu, kucubungula izinto eziphakeme kakhulu ezilinganiselayo isikhathi eside kakhulu sokushisa kungaholela ekuwohlokeni kwe-polymer, ukuze imikhiqizo ivele emabhuloki, ukwehla kwamandla. Ngakho-ke, amazinga okushisa engxenye ngayinye yomgqomo kufanele alawulwe ngokuqinile, ukuze i-pellet ekushiseni okuphezulu okuphezulu, isimo sokushisa sinengqondo ngangokunokwenzeka, umfaniswano othile, ukugwema ukuncibilika ngokweqile kanye nomsebenzi wendawo oshibhile. Ngokuqondene nakho konke ukubumba, izinga lokushisa lomgqomo akufanele lidlule ku-300 ℃, futhi isikhathi sokushisa se-pellet emgqonyeni akufanele ngedlule i-30min.
Izinto ezithuthukisiwe zemishini
Owokuqala yisimo emgqonyeni, yize kunenani elikhulu lemijovo yezezinto ezibonakalayo phambili, kepha ukugeleza okubuyiselwe kokuncibilikisa ku-screw groove kanye nokuvuza phakathi kobuso bokuphela kwesikulufa nodonga olungaphakathi lwe-barrel ethambekele futhi luyanda Ngenxa ye-liquidity enkulu, engagcini nje ngokunciphisa ingcindezi esebenzayo yomjovo kanye nenani lokuphakelayo, kodwa futhi kwesinye isikhathi livimbela inqubekela phambili ebushelelezi yokudla, ukuze isikulufa singakwazi ukubuyela emuva. Ngakho-ke, i-Check Loop kumele ifakwe ngaphambili komgqomo ukuvikela emuva. Kepha ngemuva kokufaka indandatho yokuhlola, izinga lokushisa lezinto ezibonakalayo kufanele likhuphuke ngo-10 ℃ ~ 20 ~ 20 ℃
Okwesibili yi-nozzle, isenzo somjovo sesiphothuliwe, isikulufa esibuyiselwe emuva, okuncibilikisiwe esithandweni esingaphambili ngaphansi kwengcindezi eyinsalela kungahle kube yingcindezi, okungukuthi, okuthiwa yi-salivation phenomenon ". Uma okuqukethwe okuzokwethelwa ku-cavity kuzokwenza izingxenye zibe nezindawo ezibandayo zezinto ezibonakalayo noma kunzima ukugcwalisa, uma u-nozzle ngokumelene nesikhunta ngaphambi kokususwa, futhi kwandise kakhulu ukusebenza kwenkinga, umnotho awubizi. Kuyindlela ephumelelayo yokulawula izinga lokushisa le-nozzle ngokubeka indandatho yokushisa eguqulwa ngokwehlukile ku-nozzle, kepha indlela eyisisekelo ukushintsha ama-nozzle nozzle we-sple-hole hole. Vele, impahla yasentwasahlobo esetshenziswa yilolu hlobo lwe-nozzle kumele imelane namazinga okushisa aphezulu, uma kungenjalo izolahlekelwa ngumphumela wayo omkhulu ngenxa yokuphindaphinda ukucindezela okuphezulu.
Qinisekisa ukuthi u-Dee Working kanye nokulawula okufa lokufa
Ngenxa yendawo ephezulu yokuncibilika ye-nylon, nayo, iphuzu layo leqhwa liphezulu, okusetshenziswayo okuncibilikayo ekubumbeni okubandayo kungaqiniswa nganoma yisiphi isikhathi ngenxa yokushisa kwesenzo sokuncibilikisa , ngakho-ke umjovo wejubane eliphezulu kufanele usetshenziswe, ikakhulukazi izingxenye ezincishisiwe noma izingxenye ezinde zokugeleza. Ngaphezu kwalokho, ukugcwaliswa kwesivinini esiphezulu okuphezulu nakho kuletha inkinga yokuphelelwa yi-cavity, isikhunta se-nylon kufanele sibe nezindlela ezanele zokuphelelwa amandla.
I-Nylon inezidingo eziphakeme kakhulu zokufa kokufa kunama-thermoplastics ajwayelekile. Ngokuvamile ukukhuluma, izinga lokushisa eliphakeme eliphakeme liyathandeka ukugeleza. Kubaluleke kakhulu ezingxenyeni eziyinkimbinkimbi. Inkinga ukuthi isilinganiso sokupholisa ukuncibilika ngemuva kokugcwalisa umgodi sinomthelela omkhulu esakhiweni nasezakhiweni zezingcezu ze-nylon. Ngokuyinhloko ilele ekristali yayo, lapho kushisa kakhulu esimweni se-amorphous emgodini, i-crystallization yaqala, ubukhulu bezinga lokulinganisa liphansi kokushisa okuphezulu okuphansi kanye nezinga lokudlulisa ukushisa. Lapho izingxenye ezicinile ezinobunzima obuphezulu, ukucaca okuhle nokuqina nokuqina kuyadingeka, izinga lokushisa elibi kufanele liphansi ukunciphisa izinga le-crystallization. Lapho udonga oluwugqinsi olunobulukhuni obuphezulu, ukumelana okuhle nokungamelana kahle nokuguqulwa okuncane okusebenzayo kuyadingeka, izinga lokushisa elibumba kufanele libe ngaphezulu ukukhulisa izinga le-crystallization. Izidingo zokushisa ze-nylon ziphezulu, lokhu ngoba ukwakheka kwayo kwe-shrinkage kukhulu, lapho kushintsha kusuka ku-molten state to shrinkage ivolumu yevolumu ikhulu kakhulu, ikakhulukazi imikhiqizo eqinile yodonga, i-matte lokushisa liphansi kakhulu lizodala igebe langaphakathi. Kuphela lapho izinga lokushisa elibumba lilawulwa kahle kungenzeka ukuthi izingxenye zizinze ngokwengeziwe.
Uhla lokulawula lokushisa lwe-nylon isikhunta singu-20 ℃ ~ 90 ℃. Kungcono ukuba nobabili ukupholisa (njengamanzi ompompi) nokushisa (njenge-plug-in Electric Heating ROD).
Ukuhlanganisa kanye nomswakama
Ukusetshenziswa kwezinga lokushisa eliphakeme kunezinye izinga lama-80 Izinga lokushisa le-annealing kufanele libe ngu-10 ℃ ~ 20 ~ 20 ℃ liphakeme kunamazinga okushisa enkonzo, futhi isikhathi kufanele sibe yi-10min ~ 60min ngokuya ngobukhulu. Ngemuva kokukhulisa, kufanele kuphole kancane. Ngemuva kokukhulisa nokushisa ukushisa, kungatholwa i-nylon crystal enkulu, futhi ukuqina kuyathuthukiswa. Izingxenye eziklabisiwe, ushintsho lwabantu abancane luncane, hhayi ukonakala nokuqhekeka. Izingxenye ezihlelwe yindlela yokupholisa ngokuzumayo zinekristalu eziphansi, i-crystal encane, ubutha obuphezulu kanye nokusobala.
Ukungezwa i-ejenti ye-nylon ye-nylon, ukubumba komjovo kungakhiqiza i-crystalinity crystal enkulu, kunganciphisa umjikelezo womjovo, ukucaca kanye nokuqina kwezingxenye kuthuthukisiwe.
Izinguquko kumswakama okhona zingashintsha usayizi wezingcezu ze-nylon. I-Nylon ngokwayo izinga lokushwabana liphezulu, ukuze lilondoloze okuhle kakhulu, lingasebenzisa ikhambi lamanzi noma elinamanzi ukukhiqiza ukwelashwa okumanzi. Indlela ukucwilisa izingxenye kukhambi elibilayo noma i-potassium acetate acetate solution (isilinganiso se-potassium acetate namanzi ngu-1.25: isikhathi esibilayo sibilayo 121 ℃) , 3mm 8h, 6mm 16h. Ukwelashwa komswakama kungathuthukisa ukwakheka kwepulasitiki yepulasitiki, kuthuthukise ubunzima bezingxenye, futhi kuthuthukise ukusatshalaliswa kwengcindezi yangaphakathi, futhi umphumela ungcono kunokungenisa ukwelashwa.
Isikhathi sePosi: 03-11-22