Sintering waa tillaabada muhiimka ah ee ay walxaha PTFE ku dhalaalaan, ku dareeraan, oo ay ku shubmaan filim cufan oo joogto ah oo ku xidha substrate-ka fiberglass-ka. Haddii wakhtiga haynta uu aad u gaaban yahay, dahaarka waxa uu ahaanayaa mid daloola oo daciif ah. Haddii ay aad u dheeraato, PTFE waa hoos u dhigtaa, sii daaya gaasaska sunta ah oo isu beddela jajab.
Halbeegga muhiimka ah ayaa haya waqti - muddada ka dib marka daahanku uu gaaro heerkulbeegga sintering (sida caadiga ah 370-400 ° C). Tani ma aha si fudud wakhtiga foornada ay ku jirto heerkulka; waa waqtigii dharka laftiisa ayaa ka sarreeya barta dhalaalka.
Aokai PTFE waxay hagaajisay cabbirada sintering ee khadadka alaabada badan. Hagahan waxa uu daboolayaa shuruudaha haynta ee noocyada foornada ee kala duwan, arrimaha saameeya xudunta u ah, iyo cilladaha wakhtiga aan habboonayn.
Si loo oggolaado qaybaha PTFE inay si buuxda u dhalaalaan, u qulqulaan, iyo fiyuus ka sarreeya barta dhalaalkooda (qiyaastii. 327 ° C ), samaynta filim joogto ah oo cufan oo gaadhaya isku-xidhka farsamada adag ee substrate fiberglass.
Waa muhiim in la hubiyo in dhumucda buuxda ee marada fiberglass-ka (ay ku jiraan xabagta ku dhex xayiran xirmooyinka fiber-ka gudaha) uu gaaro heerkulka dhalaalka oo uu hayo muddo ku filan. Heerkulka dusha sare oo keliya kuma filna - lakabyada gudaha waa inay sidoo kale dhalaalaan.
Tixraaca Tixraaca Hannaanka Caadiga ah
1. Foornada sintering joogto ah
Habaynta heerkulka foornada: Kuleylinta aag-badan leh oo leh aagga kulaylka sare ee loo dejiyay 380-400°C (ilaa 410°C qaabab gaar ah oo la habeeyey).
Waqtiga deganaanshaha ee waxtarka leh (waqtiga haynta) ee aagga heerkulka sare:
Dhumucda marada
Wakhti Haynta lagu taliyay
Dhar khafiif ah (0.08-0.15 mm)
30 - 90 ilbiriqsi
Dhar dhexdhexaad ah (0.15-0.30 mm)
90 - 180 ilbiriqsi (1.5 - 3 daqiiqo)
Dhar qaro weyn (0.30-0.50 mm+)
3-5 daqiiqo ama ka badan
Hagaajinta wax ku oolka ah: Xawaaraha xariiqda toosi oo ku salaysan dhererka foornada - yaree xawaaraha safarka dharka si aad u kordhiso wakhtiga joogitaanka heerkulka sare.
2. Dufcaddii (nooca-sanduuqa) foornada sintay
Ku hay heerkul joogto ah 380-390C ka dib markaad kululeyso:
Nooca Qalabka
Wakhti Haynta lagu taliyay
Maro fiberglass ah oo hal dahaaran
5 - 15 daqiiqo (wakhti laga bilaabo marka dusha sare ee dharka uu ku dhaco heerkulka bartilmaameedka)
Xusuusin: Foornooyinka sanduuqa waxay la kulmaan qaybinta heerkul aan sinnayn. Hawo wareegeysa xawaare sareeysa ayaa loo baahan yahay, waqtiga haynta waa in si ku habboon loo kordhiyo si looga fogaado hoos-u-dhaca lakabyada gudaha.
Qodobbada Muhiimka ah ee Go'aaminaya Wakhtiga Haysashada
Shan arrimood oo muhiim ah ayaa is dhexgala si loo go'aamiyo wakhtiga haynta ugu wanaagsan ee badeecad kasta oo gaar ah.
Dharka dhuuban, kuwa culculus waxa ay muujinayaan kulaylka liidata waxayna u baahan yihiin wakhti dheer in kulaylku soo galo xarunta.
2. Baasaska dahaarka iyo rarista PTFE
Lakabyo badan oo dahaar ah ayaa abuura filimaan dhumuc weyn leh oo u baahan kuleyl dheeri ah si ay si buuxda u dhalaaliso daaha hoose. Dahaarka kelida ah ee dhuuban waxay u oggolaanayaan waqti haynta gaaban.
3. PTFE darajada emulsion
Emulsions PTFE saafi ah - waxay u baahan yihiin heerkul sare iyo waqti degenaansho ku filan
Isku darka la beddelay (oo lagu daray PFA ama FEP) - waxay muujinayaan qulqulka dhalaalka sare iyo oggolaanshaha la dhimay muddada haynta
4. Heerkulka qulqulaya
Heerkulka go'an ee sarreeya (tusaale, 400°C) - soo gaabiya wakhtiga haynta ee loo baahan yahay
Heerkulka u dhow xadka hoose (370°C) – wuxuu u baahan yahay kuleyl dheer
Daaqadda 380-390°C waxay dheellitiraysaa waxtarka wax soo saarka iyo khatarta nabaad-guurka ee PTFE
Isticmaal heerkulka foornada si aad u diiwaangeliso heerkulka dusha dharka ee wakhtiga dhabta ah oo aad xaqiijiso muddada dhalaalidda waxtarka leh ee ka sarreeya 370 ° C. Tani waa habka ugu kalsoonida badan ee lagu xaqiijin karo waqtiga haynta dhabta ah.
2. Kormeerka bisaylka muuqaalka
Dahaarka PTFE oo si buuxda u sintay ayaa jira:
Labbiska badh-daah-furnaan si muuqaal dhammaystiran u muuqda (waxay ku kala duwan tahay dhumucda)
Ma jiraan wax dhalaal ah oo aan dhalaalin
Dabacsan in la taabto (ma aha qallafsanaan ama qallafsanaan)
3. Tijaabada adhesion
Majirto qolof ama hadhaaga budada ka dib tijaabada jiidista ama foorarsiga soo noqnoqda (laalaabi/kala bixi 5-10 jeer).
4. Baadhitaanka burburka ee isdhaafka ah
Gooyo dhar-goysyada qaybaha ayaa muujinaya:
Ma jiraan qaybo cad oo aan dhalaalin gudaha
Fiberglass dunns si buuxda u qoysay by PTFE la dhalaaliyay
Hayso hawo-qaad xoog leh si aad uga hortagto ururinta walxaha sunta ah (perfluoroisobutylene, HF) ee ka imanaya burburka PTFE
Si adag u xidh heerkulka ugu sarreeya iyo wakhtiga haynta
Isla markiiba dharka ku quudi aagga qaboojinta qasabka ah ka dib qaybta heerkulka sare si aad u qaboojiso ka hooseeya 300 ° C si degdeg ah - qaboojinta degdega ah waxay caawisaa qufulka qaab-dhismeed yar oo isku dhafan
Soo koobid - Tixraaca Degdega ah ee Haynta Wakhtiga
Nooca Foornada
Dhumucda marada
Wakhtiga Haynta lagu taliyay
Joogto ah (aag badan)
Khafiif ah (0.08-0.15 mm)
30 - 90 ilbiriqsi
Joogto ah (aag badan)
Dhexdhexaad (0.15-0.30 mm)
90 - 180 ilbiriqsi
Joogto ah (aag badan)
Culus (>0.30 mm)
3 - 5+ daqiiqo
Dufcaddii (nooca sanduuqa)
Jaakad keli ah
5 - 15 daqiiqo
Dufcaddii (nooca sanduuqa)
Jaakad badan oo la dhejiyay
15 - 30 daqiiqo
Xeerka guud: Qaado wakhtiga haynta ugu yar ee la aqbali karo kaas oo hubinaya dhalaalidda dahaarka oo dhammaystiran, simida, iyo eber dhexda ah oo aan dhalaalin – si loo yareeyo khatarta xaalufka kulaylka.
Aokai PTFE waxay bixisaa taageerada habka sintering oo ay ku jiraan dabagalka heerkulka, kormeerka qaybaha, iyo hagaajinta cabbirka. Nala soo xiriir wixii kaalmo farsamo ah.
