Liphaephe tsa PFA le li-welding rod: Tlhahlobo ea ts'ebeliso ea indasteri ea-masebelisoa a phahameng a fluoroplastic

Joaloka setho sa bohlokoa sa lelapa la fluoroplastic, PFA (perfluoroalkoxy resin) e sebelisoa haholo libakeng tsa lik'hemik'hale, tsa semiconductor, tsa meriana le tse ling ka lebaka la botsitso ba eona ba lik'hemik'hale, ho hanyetsa mocheso o phahameng le coefficient e tlaase ea likhohlano. E le likarolo tsa bohlokoa tsa ho hokahanya, ts'ebetso ea liphaephe tsa PFA le lithupa tse tšehetsang li-welding li ama ka ho toba ho tšepahala le bophelo ba tšebeletso ea tsamaiso. Sengoliloeng sena se tla sekaseka lintlha tsa tekheniki tsa liphaephe tsa PFA le lithupa tsa welding ho tsoa likarolong tse tharo: thepa ea thepa, maemo a ts'ebeliso le lits'ebetso tsa welding.

1. Melemo ea mantlha ea liphaephe tsa PFA

Liphaephe tsa PFA li rua khanyetso ea kutu ea PTFE (polytetrafluoroethylene), 'me ka nako e ts'oanang e ntlafatsa phallo ea metsi ka ho hlahisa sebopeho sa perfluoroalkoxy, e le hore e ka kopanngoa ka mokhoa o sa tsitsang ka ho qhibiliha ho chesang ha metsi. Thempereichara ea nako e telele-e sebelisoa ke -200℃ho +260℃, 'me thempereichara ea eona e khutšoane- ea nako e khuts'oane e ka fihla ho 300 degrees , e ka khahlanyetsang litlhoko tsa maemo a thata a ho sebetsa. Ntle le moo, PFA e na le boreleli bo holimo haholo (boleng ba Ra bo ka ba tlase ho 0.1μm), bo fokotsang ho hanyetsa mokelikeli ka nepo le ho fokotsa kotsi ea ho eketseha, 'me e ipabola haholo lits'ebetsong tsa phano ea metsi a hloekileng.

2. Moralo o ts'oanang oa lithupa tsa welding tsa PFA

Lithupa le liphaephe tsa PFA li sebelisa mokhoa o tšoanang oa thepa ea motheo ho netefatsa ho lumellana ha lik'hemik'hale le matla a mochine a manonyeletso a cheselitsoeng. -li-welding rod tsa boleng bo holimo li tlameha ho finyella litekanyetso tse latelang: index ea melting e ts'oanela phaephe (hangata 3-5g/10min), litšila li ka tlase ho 10ppm, 'me matla a matla a maholo ho feta kapa a lekana le 20MPa. Lithupa tse khethehileng tsa welding li ka boela tsa ntlafatsa khanyetso ea creep ka ho eketsa carbon fiber kapa li-microbeads tsa khalase, tse loketseng maemo a khatello e phahameng.

3. Lintlha tsa bohlokoa tsa taolo ea ts'ebetso ea welding

tjheseletso ea lipeipi tsa PFA haholo-holo e sebelisa mekhoa e 'meli: ho chesa ho qhibilihisa butt kapa sokete e tukang. Ho tjheseletsa ho chesang ho hloka taolo e nepahetseng ea mocheso (hangata 350-400 degree), khatello (0.1-0.3MPa) le nako ea ho pholisa (e seng ka tlase ho metsotso e 15) ho qoba lipululo kapa liphoso tse batang tsa welding. Ho chesoa ha mollo ho hloka ho nepahala ha sesebelisoa ho fihla ± 0.05mm le ho boloka boemo bo tsitsitseng ka metsotso e 1-2 ka mor'a hore phala e kenngoe. Ho bohlokoa ho hlokomela hore mongobo oa tikoloho ea tjheseletsa e tlameha ho ba tlase ho 60% ho thibela sebopeho sa li-pores tse bakoang ke ho fofa ha metsi.

Ka tlhokahalo e ntseng e hola ea lisebelisuoa tse sa jeng{0}}ka har'a indasteri, tlhoko ea 'maraka ea lipeipi tsa PFA le li-welding rod e ntse e eketseha. Ho tseba ho khetha ka nepo le thekenoloji ea ho cheselletsa litšepe e se e le karolo ea bohlokoa ea ho netefatsa ts'ebetso e tsitsitseng ea nako e telele- ea mochini oa mokelikeli. Nakong e tlang, ka tsoelo-pele ea theknoloji ea phetoho ea thepa, bokhoni ba ts'ebeliso ea lihlahisoa tsa PFA libakeng tse matla le ho feta bo tla lokolloa.