Ptfe ne daya daga cikin nau'in fluorine filastik, amfani da aiki da kuma rufi Layer, a sakamakon ptfe a narkewa batu 327 ℃, kuma mafi girma fiye da narkewa batu 360 ℃ ta amfani da yarwa tura extrusion sintering gyare-gyaren hanyoyin, tsari ne mafi hadaddun, tsari. kula da ingancin ya ƙunshi abubuwa da yawa, da zarar kulawar ba ta da kyau, zai iya sanya tsarin extrusion zuwa ko bayyana kowane nau'in matsala mai inganci;Da zarar extrusion da sintering ba su yi nasara ba, zai haifar da ɓangaren kayan abu ko duk abin da ya dace, farashin ptfe yana da tsada, don haka ya haifar da babban sharar gida.
Ptfe ne daya daga cikin nau'in fluorine filastik, amfani da aiki da kuma rufi Layer, a sakamakon ptfe a narkewa batu 327 ℃, kuma mafi girma fiye da narkewa batu 360 ℃ ta amfani da yarwa tura extrusion sintering gyare-gyaren hanyoyin, tsari ne mafi hadaddun, tsari. kula da ingancin ya ƙunshi abubuwa da yawa, da zarar kulawar ba ta da kyau, zai iya sanya tsarin extrusion zuwa ko bayyana kowane nau'in matsala mai inganci;Da zarar extrusion da sintering ba su yi nasara ba, zai haifar da ɓangaren kayan abu ko duk abin da ya dace, farashin ptfe yana da tsada, don haka ya haifar da babban sharar gida.Sabili da haka, wajibi ne don sarrafa tsarin extrusion na ptfe a hankali, cikakke kuma yadda ya kamata, wanda shine yanayin da ya dace don tabbatar da ingancin samfurin da rage sharar gida.
Bisa ga aikace-aikace da kuma aiki yi na ptfe abu a cikin lantarki wayoyi da igiyoyi da m kwarewa, da takarda ya ba da wani taƙaitaccen bayyani na ptfe rufi extrusion tsari, fatan taimaka samar da technicians yi daidai selection da iko a ptfe extrusion tsari.
Tsarin fasaha:
1. Sieve F4 foda
Ptfe foda shine barbashin foda bayan polymerization, mai laushi, ƙarfin yana da ƙanƙanta, lokacin da a cikin akwati na marufi da aka adana cikin sauƙi ta nauyi ko girgiza girgiza a cikin tari, haɗuwa da abin da bai dace ba, don haka kafin haɗuwa dole ne ya ɗauki wasu ƙayyadaddun ƙayyadaddun allon raga don sieve. na ptfe foda, tace mafi girman kulli dafa abinci sitaci, ƙayyadaddun allon raga a cikin raga 8 da 12 yana da kyau.Idan agglomeration yana da tsanani, ya kamata a sanya foda a cikin ƙananan zafin jiki, bayan wani lokaci, idan agglomeration ya nuna alamun raguwa, sa'an nan kuma nunawa.Ya kamata a adana foda a cikin ƙananan yanayin zafi, kuma ya kamata a kula da shi a hankali a cikin aiwatar da aiki, don kauce wa mummunan agglomeration na ptfe foda kuma ba za a iya amfani da shi ba.Bugu da kari, ya kamata a tabbatar da tsaftar muhalli kuma kada a hada datti ko kura a cikin ptfe foda.Saboda da karfi electrostatic adsorption na ptfe foda, yana da sauƙi don adsorb iska ko ƙananan ƙazanta da ƙura a kusa, don haka don kiyaye muhalli mai tsabta ba tare da ƙura ba, marufi akwati surface ya zama mai tsabta kafin bude murfin.
2. Maganin Toner ko ɓangaren litattafan almara
Lokacin da rufi yana buƙatar canza launi don ganewa, wani yanki na toner ko slurry ya kamata a ƙara zuwa ptfe foda.Toner ne bayan lafiya nika na high zafin jiki resistant Organic ko inorganic pigment foda, sauki sha danshi, agglomeration, don haka a gaba ya kamata a mai tsanani magani, cire danshi, da kuma allo, tace fitar da ya fi girma barbashi.Gabaɗaya, ƙayyadaddun allon raga 180 da 200 sun dace.Idan allon allon ya kasance ƙasa da raga 180, to, ƙwayoyin pigment bayan tacewa sun fi girma, waɗanda ba su dace da aikin rufin rufin rufin ba.Kan allo ya fi raga 200.Kodayake aikin rufin rufin rufin yana da tabbacin, yana da wahala a tacewa.Manna launi shine cakuda toner da ruwa mai mai, toner a cikin yanayin dakatarwar ruwa mai mai, amma a tsaye na ɗan lokaci zai yi hazo, don haka kafin amfani da shi yakamata a girgiza kuma a gauraya, ta yadda abubuwan da ke haifar da toner ɗin sun tsaya daidai a cikin ruwa mai mai don amfani. .
3. Abubuwan sinadaran
Batching wani shiri ne mai mahimmanci kafin haɗuwa, bisa ga rabo na polytetrafluoroethylene foda da taimakon extrusion, ko launin launi ko launi mai launi a shirye, bayan cakuda.
Akwai ƙarin nau'ikanextruder, irin su yan 20 aviation gasoline, toluene, petroleum ether, ko sauran m sauran ƙarfi mai, Organic ƙarfi, da dai sauransu, daban-daban extruder volatilization gudun ne daban-daban, bisa ga ainihin halin da ake ciki na kayan aiki, extrusion gudun zabi dace extruder.Mataimakin extrusion yana canzawa da sauri, ko da yake yana iya rage lokacin bushewa kuma yana inganta saurin extrusion, yana buƙatar lokacin aiki mai tsanani don shirye-shiryen kafin extrusion, kuma lokacin shirye-shiryen aiki bai kamata ya yi tsayi da yawa ba, in ba haka ba mataimaki na extrusion na blank zama mara amfani saboda wuce kima volatilization .Extruder yana da jinkirin yin watsi da shi, kuma ko da yake za a iya samun isasshen lokacin shirye-shiryen, dole ne a tsawaita lokacin bushewa ko buƙatar buƙatu mafi girma don ƙarfin kayan aiki.Matsakaicin extruder ya kamata ya zama 18% da 23%, kuma ya kamata a daidaita shi bisa ga ƙayyadaddun jagorar, kauri Layer Layer.extrusiongudun da extrusion matsa lamba.Gabaɗaya, ƙayyadaddun waya ya fi girma, kauri mai kauri ya fi girma, saurin extrusion ya fi sauri, matsawa ya fi ƙanƙanta, adadin mai fitar da shi na iya zama daidai ƙanana;Akasin haka, ƙayyadaddun waya ya fi ƙanƙanta, kauri mai kauri ya fi ƙanƙanta, saurin extrusion yana da hankali, matsawa ya fi girma, rabon extruder na iya zama daidai girma.
Toners sun yi ƙasa da ƙasa kuma har yanzu ana amfani da su a yau.Yin amfani da pigments zuwa rini, PTFE rufi watsawa a toner kamar yadda manna, toner da ptfe foda ne bushe hadawa, da kuma toner Additives da in mun gwada kadan, sauki sa hadawa tari, watsawa ne matalauta, ba sauki Mix, zai kai ga tsanani wanzuwar chromatism. daban-daban na rufi, don haka girmansa a matsayin ƙarami kamar yadda zai yiwu lokacin zabar buƙatun toner, ingancin toner gaba ɗaya da aka shigo da shi ya fi kyau.A cikin toner hadawa, ya kamata a zabi pigment foda zazzabi haƙuri sama da 400 ℃, in ba haka ba bayan high zafin jiki sintering (sintering zazzabi kullum asali a 350, 400 ℃) na iya bayyana samfurin Fading sabon abu.Gabaɗaya, inorganic pigments suna da kyakkyawan juriya na zafin jiki, yayin da kwayoyin halitta suna da ƙarancin juriya mai zafi.Saboda haka, yin amfani da inorganic pigments a matsayin toner ya fi dogara, amma kare muhalli ba shi da kyau.Matsakaicin ma'auni na toner gabaɗaya bai wuce]% ba, a cikin ainihin samarwa na iya zama gwargwadon nau'in toner, ingancin toner, buƙatun launi, kauri mai rufi, da sauransu.
Kodayake farashin manna launi yana da girma, yana dacewa da daidaituwa na cakuda kuma shine zaɓi mai kyau, wanda zai iya tabbatar da ingancin samfurin yadda ya kamata, aiki mai sauƙi, babban inganci da ƙarancin sharar gida.Lokacin da aka haɗa launi mai launi, ana iya ƙara launi mai launi zuwa taimakon extrusion kuma a haɗa shi daidai.Saboda da in mun gwada da babban adadin extruder, shi ne rigar gauraye da ptfe foda, don haka babu wani matsala na toner agglomeration, da kuma watsawa yana da kyau sosai, yana da sauƙi don haɗuwa daidai.Matsakaicin manna launi gabaɗaya shine tsakanin 0.3% da 0.5 ‰, tare da 3 ‰ kasancewa mafi rinjaye.Kawai 'yan lokuta na musamman suna buƙatar adadin 0.5 ‰. Lokacin da kauri mai kauri Layer gefen kauri yana da ɗan ƙaramin bakin ciki, adadin manna launi ya kamata a ƙara shi daidai da 0.1%, 0.2.
4. Cakuda
Hadawa shine a haɗa foda polytetrafluoroethylene tare da taimakon extrusion, ko foda launi ko manna launi daidai, don tabbatar da cewa lubrication na extrusion da launi iri ɗaya.Domin sauƙaƙe hadawa iri ɗaya, ƙarar kwalban haɗaɗɗen gabaɗaya (kwalban bakin baki) ya dace da 4, 5 lita, ƙimar ɗaukar nauyi kusan 800, 1 000 g, ƙarar ƙarar tana lissafin kusan 2/3 na kwalban hadawa. girma yana da kyau, don haka akwai isasshen sarari don haɗuwa.
Cakudawar launi na halitta (wanda aka fi amfani dashi don fitar da kebul na mitar rediyo) baya buƙatar ƙara toner.Lokacin hadawa, sanya ptfe foda a cikin kwalban hadawa da farko.An yi amfani da shi don sa mutane suyi ƙoƙarin kada su tuntuɓar da kwalban bangon kwalban, a cikin mutum don matsi taimako samuwa mai tsabta takardar kayan aiki za a hankali gauraya a cikin kwalban tsakiyar farfajiyar ptfe foda zuwa bangon kwalban, sanya farfajiyar ta don samar da wani wuri. zurfin kusan 2, 3 c na ramin conical, sa'an nan mutane kai tsaye amfani da su a cikin wani rabo a cikin taper rami;Bayan haka, za a rufe kwalbar da aka haɗe kuma a rufe sosai don hana mai fitar da wuta daga juyawa.Da farko, za a girgiza kwalbar a gauraya da hannu don bai wuce minti 5 ba, sannan a sanya kwalbar a kan injin hadawa don lilo sama da mintuna 30 har sai an yi daidai.
5. Karamin
Tasirin latsa (kayan abu) billet shine a danna sako-sako da foda polytetrafluoroethylene a cikin ɗan ƙaramin ɗan ƙaramin abu, yana kawar da pores da iskan da ke cikinta don amfani.Kullum ya kamata a cikin yanayin 20 ℃ sama da blank latsa, za a homogenized foda sannu a hankali zuba a cikin matsa lamba Silinda, a lokaci guda ya kamata tabbatar da cewa zuciya sanda da kuma matsa lamba Silinda concentric, da kuma a hankali girgiza da matsa lamba Silinda a cikin saman abu, sa'an nan kuma ƙara murfin matsa lamba akan shi.Ya kamata matsa lamba ya dace, da yawa ko kadan zai shafi ingancin extrusion.Idan matsa lamba na blank ya yi girma sosai, mai fitar da shi yana da sauƙin da za a yi amfani da shi, kuma aikin lubrication a lokacin extrusion ya ragu, an ƙara yawan matsa lamba, kuma damuwa na kayan ya fi girma, yana haifar da fibrosis mai yawa, wanda shine ba dace da kwanciyar hankali na waje diamita na extrusion rufi, da kuma shrinkage kudi na insulation sintering ya fi girma, wanda kuma yana da sauƙin haifar da fashewar rufi.
6. Matse waje
A shirye-shiryen aiki don ptfe rufi extrusion yafi hada da zaɓi na matsawa rabo, preheating da dumama na extrusion Silinda da mutu, daidaitawa da allura rata tsakanin mutu hannun riga da mutu core, caji blank, madugu dubawa, madugu huda, daidaitawa da thread tashin hankali, hade sealing. na inji shugaban da extrusion cylinder, da dai sauransu, wanda za a gabatar a cikin wadannan.
A matsawa rabo na daban-daban brands na ptfe foda a lokacin extrusion ne kuma daban-daban.dace matsawa rabo ya kamata a ƙaddara bisa ga kaddarorin na ptfe foda don tabbatar da aiwatar da yi da kuma ingancin a lokacin extrusion.Matsakaicin matsawa na extrusion yana nufin rabo tsakanin yanki na annular na extrusion mutu da yankin annular na blank.Gabaɗaya, silinda extruder ya kasu kashi uku: ƙanana, matsakaici da babba.Matsakaicin ƙananan silinda yana da kusan 38 mm, matsakaiciyar silinda ta kusan 50 mm, kuma babban silinda yana da kusan 65 mm. A cikin ainihin samarwa, ya kamata a zaɓi ƙayyadaddun silinda na extruder bisa ga yanki na yanki na rufin rufin extruder.
Domin kiyaye kwanciyar hankali da zafin jiki na blank da kuma sauƙaƙe juzu'i na extruder bayan extruder, extrusion Silinda da mold ya kamata a preheated yadda ya kamata.The preheating zafin jiki na extrusion Silinda ya zama 30 ko 40 ℃, da preheating zafin jiki na mold ya zama 50 ko 60 ℃.
A extrusion ya zama bisa ga ƙayyadaddun m mold mold kuma bisa ga wurin taron, da kuma mold hannun riga hali line wuyansa yawan da allura tube tsakanin nisa (rata) zuwa dace matsayi.Matsakaicin girma ko ƙarami da yawa zai shafi ingancin rufin rufin da aka fitar.Idan rata ne ma kananan, da gudu na extrusion na ptfe abu zuwa waje na mold za a kara kara, da kuma kayan za a wuce kima yanke, haifar da wuce kima fibrosis, sakamakon da rage transverse ƙarfi na rufi Layer, da Samfurin yana da haɗari ga tsagewar tsayi ko ɓarna na ciki na rufi, kuma rufin rufin da murfin madugu ba m (akwai "rufin sako-sako"). Rata ya yi yawa, zai sa ptfe abu zuwa waje na mold extrusion gudun rage gudu. , Matsalolin abu a kan jagorar yana ƙaruwa, sau da yawa yana faruwa rashin zaman lafiya ko haifar da matsawa mai motsi da kuma samar da matsala "Pine", kuma mai gudanarwa ba zai iya wucewa ta cikin al'adar allura ba.
Lokacin aikawa: Janairu-01-2018