Sintering ndi gawo lofunikira pomwe tinthu tating'onoting'ono ta PTFE timasungunuka, timatuluka, ndikuphatikizana kukhala filimu yosalekeza, wandiweyani yomwe imalumikizana ndi gawo lapansi la fiberglass. Ngati nthawi yogwirayo ili yochepa kwambiri, chophimbacho chimakhalabe cholimba komanso chofooka. Ngati motalika kwambiri, PTFE imanyozeka, kutulutsa mpweya wapoizoni ndi kutembenuka kwamphamvu.
Chofunikira chachikulu ndikusunga nthawi - nthawi yayitali yopaka utoto ikafika kutentha kwa sintering (nthawi zambiri 370-400 ° C). Iyi si nthawi yokha yomwe ng'anjo ili pa kutentha; ndi nthawi yoti nsalu yokha ili pamwamba pa malo osungunuka.
Aokai PTFE yakonza magawo a sintering pamizere yambiri yazogulitsa. Bukhuli likukhudzana ndi zofunikira za nthawi yosungiramo mitundu yosiyanasiyana ya ng'anjo, zinthu zomwe zimakhudza kwambiri, ndi zolakwika za nthawi yolakwika.
Mfundo Zofunika Kwambiri - Kodi 'Kusunga Nthawi' Kumatanthauza Chiyani Kwenikweni
1. Cholinga chachikulu
Kulola kuti PTFE particles asungunuke, ayendetse, ndi kusungunula pamwamba pa malo osungunuka (pafupifupi 327 ° C ), kupanga filimu yosalekeza komanso wandiweyani yomwe imapangitsa kuti makina azitha kusakanikirana ndi gawo lapansi la fiberglass.
2. Kusiyana kwakukulu
Kugwira nthawi kumatanthawuza kukhalitsa kwa nthawi yaitali pamene kutentha kwa ng'anjo kukufika pa kutentha kwa sintering (nthawi zambiri 370-400 ° C), osati nthawi yomwe kutentha kwa ng'anjo kumakhalabe kosasintha.
Ndikofunikira kuwonetsetsa kuti makulidwe athunthu a nsalu ya fiberglass (kuphatikiza utomoni wotsekeredwa pakati pa mitolo yamkati) ifika pa kutentha kosungunuka ndikusunga nthawi yokwanira. Kutentha kwa pamwamba kokha sikukwanira - zigawo zamkati ziyeneranso kusungunuka.
Masanjidwe a Njira Zofananira
1. Ng'anjo yoyaka mosalekeza
Kukonzekera kwa kutentha kwa ng'anjo: Kutentha kwamitundu ingapo komwe kumakhala kotentha kwambiri kumayikidwa ku 380-400 ° C (mpaka 410 ° C pazosankha zina).
Nthawi yabwino yokhalamo (nthawi yogwira) m'malo otentha kwambiri:
Makulidwe a Nsalu
Analimbikitsa Holding Time
Nsalu yopyapyala (0.08–0.15 mm)
30 - 90 masekondi
Nsalu zapakatikati (0.15–0.30 mm)
90 - 180 masekondi (1.5 - 3 min)
Nsalu yolemera kwambiri (0.30-0.50 mm+)
3 - 5 mphindi kapena kupitilira apo
Kusintha kothandiza: Sinthani liwiro la mzere kutengera kutalika kwa ng'anjo - chepetsani liwiro la kuyenda kwa nsalu kuti muwonjezere nthawi yokhalamo yotentha kwambiri.
2. Gulu (mtundu wa bokosi) ng'anjo ya sintering
Gwirani kutentha kosalekeza pa 380-390 ° C mutatha kutentha:
Mtundu Wazinthu
Analimbikitsa Holding Time
Nsalu yokhala ndi fiberglass yokhala ndi imodzi
Mphindi 5 - 15 (nthawi yake kuyambira pomwe nsalu imagunda kutentha kwa chandamale)
Mipikisano impregnated kapena laminated zinthu
15 - 30 mphindi (kutsimikizira kutentha kwamkati ndi pamwamba)
Chikumbutso: Ng'anjo zamabokosi zimakhala ndi kutentha kosafanana. Mpweya wothamanga kwambiri umafunika, ndipo nthawi yogwira iyenera kukulitsidwa moyenera kuti tipewe kutsika kwapakati kwa zigawo zamkati.
Core Factors Determining Holding Time
Zinthu zisanu zazikuluzikulu zimagwirizana kuti zitsimikizire nthawi yoyenera yogwirira chinthu chilichonse.
1. Fiberglass nsalu makulidwe ndi kulemera
Nsalu zochindikala, zolemera kwambiri zimakhala ndi matenthedwe otsika kwambiri ndipo zimafuna nthawi yayitali kuti kutentha kulowe pakati.
2. Kupaka ziphaso ndi PTFE kutsitsa
Zigawo zingapo zokutira zimapanga mafilimu a utomoni wandiweyani omwe amafunikira kutentha kwanthawi yayitali kuti asungunuke zokutira pansi. Zovala zopyapyala zokha zimalola kuti nthawi yogwira ikhale yayifupi.
3. PTFE emulsion kalasi
Koyera PTFE emulsions - amafuna apamwamba sintering kutentha ndi yokwanira kukhala nthawi
Zosakanikirana zosinthidwa (zosakanikirana ndi PFA kapena FEP) - zimawonetsa kusungunuka kwapamwamba komanso kulola kuchepetsa nthawi yogwira.
4. Sintering kutentha
Kutentha kwapamwamba kwambiri (mwachitsanzo, 400 ° C) - kufupikitsa nthawi yogwira ntchito
Kutentha pafupi ndi malire otsika (370°C) - kumafunika kutentha kwanthawi yayitali
Mazenera a 380-390 ° C amalinganiza bwino kupanga komanso chiwopsezo cha kuwonongeka kwa PTFE
5. Mapangidwe a ng'anjo ndi kuthamanga kwa mpweya wotentha
Miyendo yokhala ndi mpweya wotentha kwambiri kapena kulowa mkati mwa infrared - kutumiza kutentha koyenera, nthawi yayitali yogwira
Ng'anjo zongodalira pakuwotcha kowala - nthawi yotalikirapo yofunikira
Zowonongeka Zomwe Zimabwera Chifukwa Chogwira Molakwika Nthawi
1. Kusakwanira nthawi yogwira (pansi-sintering)
Chizindikiro
Choyambitsa
Kupaka kumasanduka opaque woyera, phula, pamwamba pamwamba
Tinthu ting'onoting'ono tating'ono tasungunuka ndi kusakanikirana
Kusamamatira bwino - kusenda mutatha kusisita kapena kupindika
Kulumikizana kofooka kwa fiberglass
Kuchepetsa mphamvu ya dielectric, kuchuluka kwa mpweya
Porous, chosakwanira filimu kapangidwe
Kuwonongeka kwamadzi / kuthamangitsa mafuta
Pamwamba siwothina
Mphamvu zamakina zosavomerezeka
Kulumikizana kofooka kwapakati-tinthu
Kuzindikira: Kuyang'ana kowoneka (kuyera koyera, koyera), kuyesa kukoka tepi (kusenda), kuyang'ana pagawo (tinthu zoyera zosasungunuka mkati).
2. Kugwira nthawi yayitali kwambiri (kupitirira-sintering)
Chizindikiro
Choyambitsa
PTFE imayamba kuwonongeka kwamafuta
Kuwonekera kwa nthawi yayitali pa 380-400 ° C (kupitirira 415 ° C)
Kupaka kumasanduka achikasu, brittle, mawanga a bulauni/wakuda
Kuwonongeka kwa kutentha
Kutulutsidwa kwa gasi wa poizoni wa fluoride (HF, PFIB)
Kuwonongeka kwa PTFE
Fiberglass imataya mphamvu yokhazikika
Kuwonongeka kwakukulu kwa okosijeni
Mapini ndi thovu pa zokutira pamwamba
Kusintha kwa gasi kuchokera pakuwonongeka
Kuzindikira: Kuyang'ana m'maso (achikasu, mawanga oyaka), kuyesa kwa brittleness (ming'alu ikapindika), kuzindikira fungo (fungo la acrid likuwonetsa kuwola).
Miyezo Yoyendera Yothandiza ndi Malangizo Okonzekera Njira
1. Khazikitsani ma curve a nthawi ya kutentha
Gwiritsani ntchito chojambulira cha kutentha kwa ng'anjo kuti mujambule kutentha kwapanthawi yeniyeni kwa nsalu ndikutsimikizira kuti nthawi yosungunuka imasungunuka kuposa 370 ° C. Iyi ndiyo njira yodalirika yotsimikizira nthawi yeniyeni yogwira.
2. Kuyang'anira kukula kowoneka
Zokutira bwino za PTFE zilipo:
Uniform semi-transparent kuti awoneke bwino (amasiyana ndi makulidwe)
Palibe chalky unmelted particles
Zosinthika kukhudza (osati owuma kapena brittle)
3. Kuyesa kumamatira
Palibe peeling kapena zotsalira za ufa pambuyo poyesa kukoka kwa tepi kapena kupindika mobwerezabwereza (pindani / kufutukula nthawi 5-10).
4. Kuwunika kowononga magawo osiyanasiyana
Magawo odulidwa a nsalu akuwonetsa:
5. Njira zotetezera ndi kuziziritsa mokakamiza
Sungani mpweya wabwino wopopera kuti mupewe kudzikundikira kwa poizoni (perfluoroisobutylene, HF) kuchokera pakuwola kwa PTFE
Kuchepetsa kwambiri kutentha kwambiri komanso nthawi yogwira
Nthawi yomweyo dyetsani nsalu m'malo oziziritsa mokakamizidwa pambuyo poti kutentha kwapamwamba kuzizire pansi pa 300 ° C mwachangu - kuziziritsa mwachangu kumathandiza kutseka mu microstructure yosakanikirana.
Chidule - Quick Reference Holding Time Guide
Mtundu wa Ng'anjo
Makulidwe a Nsalu
Analimbikitsa Hold Time
Zopitilira (zoni zambiri)
Woonda (0.08-0.15 mm)
30 - 90 masekondi
Zopitilira (zoni zambiri)
Wapakati (0.15-0.30 mm)
90 - 180 masekondi
Zopitilira (zoni zambiri)
Cholemera (> 0.30 mm)
3 - 5+ mphindi
Gulu (mtundu wa bokosi)
Chovala chimodzi
Mphindi 5-15
Gulu (mtundu wa bokosi)
Multi-coat / laminated
15-30 mphindi
Lamulo lazonse: Khalani ndi nthawi yovomerezeka yovomerezeka yomwe imatsimikizira kusungunuka kwathunthu, kusanja, ndi ziro zosasungunuka zamkati - kuti muchepetse chiwopsezo cha kuwonongeka kwa kutentha.
Aokai PTFE imapereka chithandizo cha sintering kuphatikiza kutsatira kutentha, kuyang'anira magawo osiyanasiyana, ndi kukhathamiritsa kwa magawo. Lumikizanani nafe kuti mupeze thandizo laukadaulo.
Zomwe zili pamwambapa zaukadaulo zimaperekedwa ndi Malingaliro a kampani Jiangsu Aokai New Materials Technology Co., Ltd.
Ngati mukufuna kukhala ndi mwatsatanetsatane, zochitika zogwiritsira ntchito ndi mayankho makonda a mzere wathu wonse wa mankhwala kuphatikizapo PTFE high-temperature nsalu, PTFE high-temperature adhesive tepi, PTFE high-temperature mesh lamba, lamba wosakanizika kutentha, nsalu imodzi ya PTFE, nsalu yotchinga kutentha kwambiri, kukhudzana ndi magalasi otetezera kutentha, chonde tilankhule ndi magalasi otetezedwa ndi magalasi.
Timatsatira miyezo yaukatswiri ndi kukhulupirika, odzipereka kukupatsirani mayankho amakampani omwe amasiyanitsidwa ndi ntchito zamakasitomala oganiza bwino!
