Sintering shine muhimmin mataki inda PTFE barbashi narke, gudana, da fuse cikin ci gaba, fim mai yawa wanda ke haɗawa da fiberglass substrate. Idan lokacin riƙewa ya yi gajere sosai, rufin ya kasance mara ƙarfi da rauni. Idan yayi tsayi da yawa, PTFE yana raguwa, yana fitar da iskar gas mai guba kuma yana juyewa.
Maɓallin maɓalli yana riƙe lokaci - tsawon lokacin bayan babban abin rufewa ya kai ga zafin jiki (yawanci 370-400 ° C). Wannan ba kawai lokacin da tanderun ke cikin zafin jiki ba; lokaci ne masana'anta kanta yana sama da wurin narkewa.
Aokai PTFE ya inganta sigogin sintering a cikin layin samfura da yawa. Wannan jagorar ya ƙunshi riko da buƙatun lokacin don nau'ikan tanderu daban-daban, ainihin abubuwan da ke tasiri, da lahani daga lokacin da bai dace ba.
Ka'idoji na asali - Abin da 'Lokaci Rike' ke nufi da gaske
1. Core manufa
Don ba da damar barbashi na PTFE su narke gabaɗaya, gudana, da fuse sama da madaidaicin narkewa (kimanin 327 ° C ), ƙirƙirar fim mai ci gaba kuma mai yawa wanda ke samun haɗin gwiwa tare da fiberglass substrate.
2. Mahimman bambanci
Riƙe lokacin yana nufin tsawon lokacin da aka ɗora bayan babban abin rufewa ya kai ga zafin jiki (yawanci 370-400 ° C), maimakon kawai tsawon lokacin zafin wutar tanderu ya kasance koyaushe.
Yana da mahimmanci don tabbatar da cikakken kauri na fiberglass masana'anta (ciki har da resin da aka makale tsakanin daurin fiber na ciki) ya kai zafin narkewa kuma yana riƙe da isasshen lokaci. Yanayin zafin jiki kawai bai isa ba - yadudduka na ciki dole ne su narke.
Matsakaicin Matsakaicin Tsari Na Musamman
1. Ci gaba da sintering makera
Saitin zafin wuta na tanderu: dumama yanki mai yawa tare da babban yankin zafin jiki wanda aka saita zuwa 380-400 ° C (har zuwa 410 ° C don wasu ƙayyadaddun tsari).
Ingantacciyar lokacin zama (lokacin riƙewa) a cikin yanki mai zafi:
Kauri Fabric
Shawarar Riƙe Lokaci
Yaren bakin ciki (0.08-0.15 mm)
30 - 90 seconds
Matsakaicin masana'anta (0.15-0.30 mm)
90 - 180 seconds (minti 1.5 - 3)
Yadudduka mai kauri (0.30-0.50 mm+)
Minti 3-5 ko fiye
Daidaita aiki: Saurin layin da ya dogara da tsayin tanderu - rage saurin tafiya masana'anta don tsawaita lokacin zama mai zafi.
2. Batch (nau'in akwatin) tanderun wuta
Riƙe yawan zafin jiki a 380-390 ° C bayan dumama:
Nau'in Abu
Shawarar Riƙe Lokaci
Gilashin fiberglass mai rufi guda ɗaya
Minti 5-15 (lokacin da aka yi daga lokacin da saman masana'anta ya kai ga zafin da aka yi niyya)
Multi-impregnated ko laminated abu
Minti 15 - 30 (don tabbatar da daidaitaccen ciki da zafin jiki)
Tunatarwa: Akwatin murhun wuta yana fama da rarraba yanayin zafi mara daidaituwa. Ana buƙatar iska mai saurin zagayawa, kuma za a tsawaita lokacin riƙewa yadda ya kamata don guje wa ɓarnawar yadudduka na ciki.
Mahimman Abubuwan Da Ya Shafa Lokacin Riƙe
Abubuwa biyar masu mahimmanci suna hulɗa don ƙayyade mafi kyawun lokacin riƙe kowane takamaiman samfur.
1. Fiberglass masana'anta kauri da nauyi
Yadudduka masu kauri, masu nauyi sun ƙunshi ƙarancin ƙarancin zafin jiki kuma suna buƙatar ɗaukar lokaci mai tsawo don zafi don shiga tsakiyar.
2. Shafi wucewa da PTFE loading
Yadudduka masu yawa suna ƙirƙirar fina-finai mai kauri mai kauri waɗanda ke buƙatar tsawaita dumama don narkar da murfin ƙasa. Rubutun bakin ciki guda ɗaya yana ba da damar ɗan gajeren lokacin riƙewa.
3. PTFE emulsion sa
Pure PTFE emulsions – na bukatar mafi girma sintering yanayin zafi da isasshen lokacin zama
Haɗe-haɗe da aka gyaggyarawa (haɗe da PFA ko FEP) - suna nuna madaidaicin kwararar narkewa da ba da izinin rage tsawon lokacin riƙewa
Rashin mannewa mara kyau - bawon bayan shafa ko nadawa
Raunan haɗin kai zuwa fiberglass
Rage ƙarfin dielectric, haɓakar iska mai girma
Porous, tsarin fim bai cika ba
Rashin gurɓataccen ruwa/mai mai
Surface ba cikakken mai yawa ba
Ƙarfin injina mara inganci
Rauni tsakanin barbashi bonding
Ganewa: Duban gani (fararen fata, mai hatsi), gwajin jan tef (peeling), dubawar sashe (fararen da ba a narkewa a ciki).
2. Yawan riko da lokaci mai yawa (sama-sintering)
Alama
Tushen Dalili
PTFE fara bazuwar thermal
Tsawon haske a 380-400C (mai tsanani sama da 415°C)
Rubutun ya juya launin rawaya, gaggautsa, launin ruwan kasa/baƙi
Rushewar thermal
Gas mai guba mai guba (HF, PFIB)
Bazuwar PTFE
Gilashin fiberglass yana rasa ƙarfin ƙarfi
Lalacewar iskar oxygen mai zafi
Pinholes da kumfa a kan rufin rufi
Juyin iskar gas daga lalacewa
Ganewa: Duban gani (yellowing, scorch spots), gwajin gatsewa (fashewa lokacin lanƙwasa), gano wari (ƙanshin ƙamshi yana nuna bazuwar).
Ma'auni na Bincike na Aiki da Nasihun Inganta Tsari
1. Kafa zafin-lokaci masu lankwasa
Yi amfani da ma'aunin zafin jiki na tanderun don yin rikodin yanayin zafin masana'anta na ainihi da kuma tabbatar da tsawon lokacin narkewa sama da 370 ° C. Wannan ita ce hanya mafi aminci don tabbatar da ainihin lokacin riƙewa.
2. Duban balaga na gani
Cikakkun kayan shafa na PTFE sun kasance:
Uniform Semi-transparent zuwa cikakkiyar bayyanar (ya bambanta da kauri)
Babu alli mara narkewa
Mai sassauƙan taɓawa (ba mai tauri ko gaggautsa ba)
3. Gwajin adhesion
Babu ragowar kwasfa ko foda bayan gwajin ja na tef ko maimaita lanƙwasawa (ninka / buɗe sau 5-10).
4. Cross-section lalata dubawa
Yanke masana'anta giciye ya nuna:
Babu fararen barbashi marasa narkewa a ciki
Fiberglass yadudduka cikakke da aka jika ta narkakken guduro na PTFE
5. Matakan tsaro da tilasta sanyaya
Ci gaba da samun iska mai ƙarfi don hana tara abubuwan da ke haifar da guba (perfluoroisobutylene, HF) daga bazuwar PTFE.
Tsayayye iyakar zafin jiki da lokacin riƙewa
Nan da nan ciyar da masana'anta a cikin yankin sanyaya tilastawa bayan sashin zafin jiki mai zafi don kwantar da ƙasa ƙasa da 300 ° C da sauri - saurin sanyaya yana taimakawa kulle a cikin microstructure.
Takaitawa - Jagorar Rike Lokaci Mai Sauri
Nau'in Furnace
Kauri Fabric
Shawarar Lokacin Riƙe
Ci gaba (multi-zone)
Bakin ciki (0.08-0.15 mm)
30 - 90 seconds
Ci gaba (multi-zone)
Matsakaici (0.15-0.30 mm)
90 - 180 seconds
Ci gaba (multi-zone)
Nauyi (> 0.30 mm)
Minti 3-5+
Batch (nau'in akwatin)
Tufafi ɗaya
5-15 mintuna
Batch (nau'in akwatin)
Multi-coat / laminated
Minti 15-30
Gabaɗaya doka: Ɗauki mafi ƙarancin lokacin riƙewa wanda ke tabbatar da cikakken narkewa, daidaitawa, da sifiri mara narkewa na ciki - don rage haɗarin lalata yanayin zafi.
Aokai PTFE yana ba da tallafin tsarin sintering wanda ya haɗa da bin diddigin zafin jiki, binciken giciye, da haɓaka siga. Tuntube mu don taimakon fasaha.
