I-Ptfe ingenye yezinhlobo zepulasitiki e-fluorine, esetshenziselwa ukucubungula kanye nongqimba lokufakelwa, ngenxa ye-ptfe endaweni encibilikayo engu-327 ℃, futhi iphakeme kunephuzu lokuncibilika elingu-360 ℃ kusetshenziswa izindlela zokubumba ezilahlwayo ze-push extrusion sintering, inqubo iyinkimbinkimbi, inqubo ukulawulwa kwekhwalithi kuhilela izici eziningi, uma ukulawula kungalungile, kungenza inqubo yokukhipha noma ivele zonke izinhlobo zenkinga yekhwalithi;Uma i-extrusion ne-sintering ingaphumeleli, izobangela ingxenye yezinto ezibonakalayo noma yonke i-scrap, intengo ye-ptfe iyabiza, ngakho-ke kubangele udoti omkhulu.
I-Ptfe ingenye yezinhlobo zepulasitiki e-fluorine, esetshenziselwa ukucubungula kanye nongqimba lokufakelwa, ngenxa ye-ptfe endaweni encibilikayo engu-327 ℃, futhi iphakeme kunephuzu lokuncibilika elingu-360 ℃ kusetshenziswa izindlela zokubumba ezilahlwayo ze-push extrusion sintering, inqubo iyinkimbinkimbi, inqubo ukulawulwa kwekhwalithi kuhilela izici eziningi, uma ukulawula kungalungile, kungenza inqubo yokukhipha noma ivele zonke izinhlobo zenkinga yekhwalithi;Uma i-extrusion ne-sintering ingaphumeleli, izobangela ingxenye yezinto ezibonakalayo noma yonke i-scrap, intengo ye-ptfe iyabiza, ngakho-ke kubangele udoti omkhulu.Ngakho-ke, kuyadingeka ukulawula inqubo ye-extrusion ye-ptfe ngokunengqondo, ngokugcwele nangempumelelo, okuyisimo esidingekayo sokuqinisekisa ikhwalithi yomkhiqizo nokunciphisa imfucuza.
Ngokusekelwe ekusetshenzisweni nasekucubunguleni umkhuba wezinto ezibonakalayo ze-ptfe ezintanjeni zikagesi nezintambo kanye nolwazi olusebenzayo, leli phepha linikeza umbono omfishane wenqubo ye-ptfe insulation extrusion, ngethemba lokusiza ochwepheshe bokukhiqiza ukuba benze ukukhetha okulungile nokulawula kunqubo ye-ptfe extrusion.
Inqubo yezobuchwepheshe:
1. Sieve F4 powder
I-Ptfe powder iyizinhlayiya zempushana ngemva kokwenziwa kwe-polymerization, ithambile, amandla mancane kakhulu, lapho isesitsheni sokupakisha esigcinwa kalula ngesisindo noma ukudlidliza kwesiphithiphithi lapho kuthuthwa iqoqo, ihlanganisa into engalingani, ngakho-ke ngaphambi kokuhlanganisa kufanele kusetshenziswe ukucaciswa okuthile kwesikrini semeshi ukuze kusefe. ye-ptfe powder, hlunga i-findo elikhudlwana lokupheka isitashi, ukucaciswa kwesikrini semeshi ku-8 no-12 mesh kuyancomeka.Uma i-agglomeration ingathí sina, i-powder kufanele ibekwe endaweni yokushisa ephansi, ngemva kwesikhathi esithile, uma i-agglomeration ibonisa izimpawu zokukhululeka, bese ihlola.Impushana kufanele igcinwe endaweni yokushisa ephansi, futhi kufanele iphathwe ngobumnene ngesikhathi sokuphatha, ukuze ugweme ukuhlanganiswa okunzima kwe-ptfe powder futhi ayikwazi ukusetshenziswa.Ngaphezu kwalokho, ukuhlanzeka kwemvelo kufanele kuqinisekiswe futhi ukungcola noma uthuli akufanele kuhlanganiswe ku-ptfe powder.Ngenxa ye-electrostatic adsorption enamandla ye-ptfe powder, kulula ukukhangisa umoya noma ukungcola okuncane nothuli nxazonke, ngakho-ke ukugcina indawo ezungezile ihlanzekile ngaphandle kothuli, indawo yesitsha sokupakisha kufanele ihlanzeke ngaphambi kokuvula ikhava.
2. Ukwelashwa kwe-Toner noma i-pulp
Lapho ukwahlukanisa kudinga umbala ukuze kukhonjwe, ingxenye ethile ye-toner noma i-slurry kufanele yengezwe ku-ptfe powder.I-Toner ingemva kokugaya okuhle kokumelana nokushisa okuphezulu kwe-organic noma i-pigment powder, kulula ukumunca umswakama, i-agglomeration, ngakho-ke kufanele kusenesikhathi ukwelashwa okushisiwe, ukususa umswakama, kanye nesikrini, ukuhlunga izinhlayiya ezinkulu.Ngokuvamile, ukucaciswa kwesikrini semeshi engu-180 no-200 kuyafaneleka.Uma isikrini sesikrini sisincane kune-mesh engu-180, khona-ke izinhlayiya ze-pigment ngemva kokuhlunga ziba zinkulu, ezingahambisani nokusebenza kokufakwa kwe-insulation layer.I-screen mesh ingaphezu kuka-200 mesh.Nakuba ukusebenza kokufakwa kwe-insulation kuqinisekisiwe, kunzima ukuhlunga.Okunamathiselwe kombala kuyingxube ye-toner kanye noketshezi olunamafutha, i-toner esesimweni sokumiswa koketshezi olunamafutha, kodwa ukuma isikhathi esithile kuzoncipha, ngakho-ke ngaphambi kokusetshenziswa kufanele kunyakaziswe futhi kuxutshwe, ukuze izinhlayiya ze-toner zimiswe ngokulinganayo oketshezini olunamafutha ukuze zisetshenziswe. .
3. Izithako
I-Batching iyilungiselelo elibalulekile ngaphambi kokuxuba, ngokusho kwesilinganiso se-polytetrafluoroethylene powder kanye ne-extrusion aid, noma i-powder yombala noma unamathisele umbala ngomumo, ngemva kwengxube.
Kukhona ezinye izinhloboi-extruder, njenge-yan 20 ye-aviation petroli, i-toluene, i-petroleum ether, noma amanye amafutha e-solvent aguquguqukayo, i-solvent ephilayo, njll., isivinini esihlukile se-extruder volatilization sihlukile, ngokusho kwesimo sangempela semishini, isivinini se-extrusion ukukhetha i-extruder efanele.Umsizi we-extrusion uyashintshashintsha ngokushesha kakhulu, nakuba anganciphisa isikhathi sokumisa futhi athuthukise isivinini se-extrusion, kudinga isikhathi esiqinile sokusebenza sokulungiselela ngaphambi kokukhishwa, futhi isikhathi sokusebenza sokulungiselela akufanele sibe side kakhulu, ngaphandle kwalokho umsizi we-extrusion we-blank ngeke. kungasebenzi ngenxa yokuguquguquka okukhulu .I-Extruder iphuza kakhulu ukuhwamuka, futhi nakuba kungase kube nesikhathi esanele sokulungiselela, isikhathi sokumisa kufanele sinwetshwe noma izidingo eziphakeme zomthamo wezinto zokusebenza ziyadingeka.Ingxenye ye-extruder kufanele ibe ngu-18% no-23%, futhi kufanele ilungiswe ngokuya ngokucaciswa kwe-conductor, ukushuba kongqimba lwe-insulation,i-extrusionisivinini kanye nengcindezi ye-extrusion.Ngokuvamile, ukucaciswa kocingo kukhulu, ukushuba kwe-insulation kukhulu, isivinini sokukhipha siyashesha, ukucindezelwa kuncane, isilinganiso se-extruder singaba sincane ngokufanelekile;Ngokuphambene nalokho, ukucaciswa kocingo kuncane, ukujiya kwe-insulation mncane, isivinini sokukhipha sihamba kancane, ukucindezelwa kukhulu, ingxenye ye-extruder ingaba nkulu ngokufanele.
Amathoni abiza kancane futhi asasetshenziswa nanamuhla.Ukusebenzisa i-pigments ukudaya, i-PTFE insulation dispersion in toner as paste, toner kanye ne-ptfe powder kuwukuxuba okomile, kanye nezithasiselo ze-toner futhi kuncane kakhulu, kulula ukubangela iqoqo lokuxuba, ukuhlakazeka akubi, akulula ukuxutshwa, kuzoholela ekubeni khona kwe-chromatism. ingxenye ehlukene yokwahlukanisa, ngakho-ke ubukhulu bayo buncane ngangokunokwenzeka lapho ukhetha izidingo ze-toner, ikhwalithi ye-toner evamile engenisiwe ingcono.Ekuxubeni kwe-toner, kufanele ukhethe ukubekezelela kwezinga lokushisa kwe-pigment powder ngaphezu kuka-400 ℃, ngaphandle kwalokho ngemva kokushisa okuphezulu kwe-sintering (izinga lokushisa le-sintering ngokuvamile eliyisisekelo ngo-350, 400 ℃) kungase kuvele into ephelayo yomkhiqizo.Ngokuvamile, i-pigments ye-inorganic inokumelana okuhle nezinga lokushisa eliphezulu, kuyilapho i-organic pigments inokumelana okuphansi kwezinga lokushisa eliphezulu.Ngakho-ke, ukusetshenziswa kwezingulube ze-inorganic njenge-toner kunokwethenjelwa kakhulu, kodwa ukuvikelwa kwayo kwemvelo akulungile.Isilinganiso sokuqhathanisa se-toner ngokuvamile asibi ngaphezu kuka-]%, ekukhiqizeni kwangempela singaba ngokohlobo lwe-toner, ikhwalithi ye-toner, izidingo zombala, ukushuba kongqimba lwe-insulation, njll.
Nakuba izindleko zokunamathisela umbala ziphezulu, zihambisana nokufana kwengxube futhi kuyisinqumo esihle, esingaqinisekisa ngempumelelo ikhwalithi yomkhiqizo, ukusebenza okulula, ukusebenza kahle okuphezulu kanye nokuchithwa okuncane.Uma uhlanganisa ukunamathisela kombala, ukunamathisela kombala kungangezwa kusizo lwe-extrusion futhi kuxutshwe ngokulinganayo.Ngenxa yenani elikhulu le-extruder, limanzi lixutshwe ne-ptfe powder, ngakho-ke ayikho inkinga ye-toner agglomeration, futhi ukuhlakazeka kuhle kakhulu, kulula ukuxuba ngokulinganayo.Ingxenye yokunamathisela kombala ngokuvamile iphakathi kuka-0.3% no-0.5 ‰, no-3 ‰ kube iningi.Amacala ambalwa kuphela akhethekile adinga isilinganiso se-0.5 ‰.Lapho ukushuba kongqimba lwe-insulation ungqimba kuqhathaniswa mncane, ingxenye yokunamathisela umbala kufanele inyuke ngokufanele ngo-0.1%, 0.2.
4. Ingxube
Ukuxuba ukuxuba i-polytetrafluoroethylene powder ne-extrusion aid, noma impushana yombala noma unamathisele umbala ngokulinganayo, ukuqinisekisa ukuthi ukugcotshwa kwe-extrusion insulation kanye nokufana kombala.Ukuze kube lula ukuxutshwa komfaniswano, umthamo webhodlela lokuxuba elijwayelekile (ibhodlela lomlomo obanzi) lifanele amalitha angama-4, 5, ikhwalithi yokulayisha icishe ibe ngu-800, 1 000 g, ivolumu yokulayisha ibalelwa ku-2/3 webhodlela lokuxuba. umthamo ulungile, ngakho-ke kunesikhala esanele sokuxuba.
Ingxube yombala wemvelo (ikakhulukazi esetshenziselwa ukukhipha isimboli sekhebula lefrikhwensi yomsakazo) ayidingi ukwengeza i-toner.Lapho uhlanganisa, faka i-ptfe powder ebhodleleni lokuxuba kuqala.Isetshenziselwa ukwenza abantu bazame ukuthintana nokuxuba ibhodlela lodonga lwebhodlela, mathupha ukuze ucindezele usizo olutholakalayo ithuluzi leshidi elihlanzekile lizoxuba ngobumnene ebhodleleni phakathi nendawo ye-ptfe powder ukuze ibhodlela odongeni, lenze isikhungo salo sobuso ukuze senze ukujula mayelana 2, 3 c of imbobo oyindilinga, khona-ke abantu ngokuqondile esetshenziswa ingxenye ethile emgodini taper;Ngemuva kwalokho, ibhodlela lokuxuba kufanele limbozwe futhi livalwe ngokuqinile ukuvimbela i-extruder ukuthi ingashisi.Okokuqala, ibhodlela lokuxuba lizonyakaziswa futhi lixutshwe ngesandla isikhathi esingaphansi kwemizuzu emi-5, bese ibhodlela lokuxuba lizofakwa emshinini wokuxuba ukuze lizule futhi ligoqe imizuzu engaphezu kwengu-30 kuze kube yilapho ukuxuba kufana.
5. Ihlangene
Umthelela we-billet yokucindezela (yezinto ezibonakalayo) uwukucindezela i-porous polytetrafluoroethylene powder evulekile ibe yi-billet yempahla ehlangene, esusa izimbotshana nomoya oqukethwe kuyo ukuze isetshenziswe ngaphandle.Ngokujwayelekile kufanele ibe endaweni engama-20 ℃ ngaphezu kokucindezela okungenalutho, izoba yimpushana e-homogenized kancane kancane ithele ku-cylinder cylinder, ngesikhathi esifanayo kufanele iqinisekise ukuthi induku yenhliziyo ne-pressure cylinder cylinder concentric, futhi ngobumnene unyakazise isilinda sokucindezela indawo ebonakalayo, bese wengeza ikhava yokucindezela kuyo.Ukucindezela kufanele kube okufanelekile, okuningi noma okuncane kakhulu kuzothinta ikhwalithi ye-extrusion.Uma ukucindezela kokungenalutho kukhulu kakhulu, i-extruder kulula ukucindezelwa ngokweqile, futhi ukusebenza kwe-lubrication ngesikhathi se-extrusion kuyancipha, ingcindezi ye-extrusion iyanda, futhi ukucindezeleka kwe-shear kwempahla kukhulu, okuholela ku-fibrosis ngokweqile, okuyinto akusizi ekuzinzeni kobubanzi bangaphandle be-extrusion insulation, futhi izinga lokuncipha kwe-insulation sintering likhulu, futhi kulula ukubangela ukuqhekeka kwe-insulation.
6. Khama
Umsebenzi wokulungiselela we-ptfe insulation extrusion ikakhulukazi uhlanganisa ukukhethwa kwesilinganiso sokucindezela, ukushisa kwangaphambili kanye nokushisa kwe-extrusion cylinder kanye nokufa, ukulungiswa kwegebe yenaliti phakathi komkhono wokufa kanye ne-die core, ukushaja okungenalutho, ukuhlolwa komqhubi, ukubhoboza umqhubi, ukulungiswa kokushuba kwentambo, ukuhlanganisa uphawu. wekhanda lomshini kanye nesilinda sokukhipha, njll., okuzokwethulwa kulokhu okulandelayo.
Isilinganiso sokucindezelwa semikhiqizo ehlukene ye-ptfe powder ngesikhathi sokukhipha i-extrusion nayo ihlukile.isilinganiso esifanele sokucindezela kufanele sinqunywe ngokusho kwezakhiwo ze-ptfe powder ukuze kuqinisekiswe ukusebenza kwenqubo kanye nekhwalithi ngesikhathi sokukhipha.Isilinganiso sokucindezela kwe-Extrusion sibhekisela esilinganisweni esiphakathi kwendawo eyi-annular ye-extrusion die kanye nendawo eyi-annular yokungenalutho.Ngokuvamile, amasilinda e-extruder ahlukaniswe ngamasayizi amathathu: amancane, aphakathi nendawo namakhulu.Ububanzi be-cylinder encane bungaba ngu-38 mm, i-cylinder ephakathi ingaba ngu-50 mm, futhi isilinda esikhulu singaba ngu-65 mm.
Ukuze kugcinwe izinga lokushisa elizinzile le-blank futhi lula ukuvuthwa kwe-extruder ngemva kokukhishwa, i-cylinder extrusion kanye nesikhunta kufanele kushiswe kahle.Ukushisa kwangaphambi kokushisa kwesilinda sokukhipha kufanele kube ngu-30 noma 40 ℃, futhi izinga lokushisa langaphambi kwesikhunta kufanele libe ngu-50 noma 60 ℃.
I-extrusion kufanele ibe ngokusho kwemininingwane yesikhunta esihambisanayo futhi ngokusho kwendawo yomhlangano, kanye nomkhono wesikhunta ophethe umugqa wentamo yabantu kanye neshubhu yenaliti phakathi kwebanga (igebe) endaweni efanele.Ukucaciswa okukhulu kakhulu noma okuncane kakhulu kuzothinta ikhwalithi yongqimba olunwetshiwe lwe-insulation.Uma igebe lincane kakhulu, isivinini sokukhishwa kwempahla ye-ptfe kuya ngaphandle kwesikhunta sizosheshiswa, futhi impahla izosikwa ngokweqile, okuholela ku-fibrosis ngokweqile, okuholela ekwehleni kwamandla aguquguqukayo we-insulation layer, umkhiqizo uthambekele ekuqhekekeni kwe-longitudinal noma ukuqhekeka kwangaphakathi kokufakwa ngaphakathi, futhi okokufaka kanye ne-conductor coating akuqinile (kukhona "ikhava evulekile"). Igebe likhulu kakhulu, lizokwenza i-ptfe impahla ngaphandle kwe-mold extrusion velocity yehlise ijubane , ingcindezi yezinto ezibonakalayo ku-conductor iyanda, kuvame ukwenzeka ukungazinzi kwe-extrusion noma kubangele ukucindezelwa komqhubi futhi kukhiqize inkinga "yephayini", futhi umqhubi akakwazi ukudlula endaweni yepulaki yenaliti.
Isikhathi sokuthumela: Jan-01-2018