CHIYAMBI CHA NJIRA YOPANGIDWA KWA TUBE YA PTFE

Njira yopangiraChubu cha PTFEndi: PTFE, chothandizira kutulutsa → kusakaniza → kukanikiza → kuumitsa → kupukuta → kuziziritsa → chinthu

Njira yopangira machubu a PTFE imaphatikizapo njira yokankhira, njira yotulutsira, njira ya hydraulic, njira yowotcherera, njira yozungulira, ndi zina zotero, zomwe njira yokankhira ndiyo njira yayikulu. Kawirikawiri, utomoni wa PTFE wobalalitsidwa wokhala ndi kukula kwa tinthu tating'onoting'ono ta 500μm ndi kuchuluka kooneka kwa 0.45gml ~ 0.55gml umagwiritsidwa ntchito. Pa machubu ang'onoang'ono a mainchesi, gwiritsani ntchito utomoni wokhala ndi kukanikiza kwakukulu, ndipo pa machubu akuluakulu a mainchesi, gwiritsani ntchito utomoni wokhala ndi kukanikiza kochepa. Chothandizira chofinyira nthawi zambiri chimasankha 200 ndi 260 mineral spirits. Kukonza kwachiwiri kwa machubu a PTFE kumatha kupanga machubu a PTFE otenthetsera kutentha, machubu ozungulira a PTFE, machubu ozungulira a PTFE, ndi zina zotero.

Chubu cha polytetrafluoroethylene chimapangidwa ndi utomoni wobalalitsidwa wa polytetrafluoroethylene kutentha kwa chipinda pogwiritsa ntchito organic solvent ngati chothandizira kutulutsa, kenako nkuumitsa ndikuwumitsa. Malinga ndi kukula kwa chubu, chingagawidwe m'mitundu iwiri: chubu wamba ndi chubu chaching'ono. M'mimba mwake wa chubu wamba ndi 4mm, ndipo m'mimba mwake wa chubu chaching'ono ndi wochepera kapena wofanana ndi 4mm.

Njira yopangira chubu cha PTFE ndi iyi: PTFE, chothandizira kutulutsa → kusakaniza → kukanikiza → kuumitsa → kuuma → kuziziritsa → chinthu.

Machubu a polytetrafluoroethylene ali ndi mphamvu yabwino yamakina. Ma gasket ndi ma gasket athyathyathya, ma gasket ooneka ngati V, mphete za piston, ma gasket a ball valve, ndi zina zotero, zomwe zimapangidwa ndi ndodo za PTFE, machubu, ndi mbale pogwiritsa ntchito makina otembenuza kapena kudula, zomwe sizimalimbana ndi dzimbiri, sizimalimbana ndi mpweya komanso sizimayendetsa mpweya.

1. Machubu a Teflon nthawi zambiri amagwiritsa ntchito njira yopangira compression, ndipo njira yopangira plunger extrusion ingagwiritsidwenso ntchito. Utomoni womwe umapezeka pogwiritsa ntchito njira yopangira dispersion polymerization ukhoza kupangidwa pogwiritsa ntchito phala extrusion ndi calendering.

2. PTFE ili ndi pH ya 0-14 (kupatula zitsulo zosungunuka za alkali ndi fluorine pansi pa kutentha kwakukulu ndi kupanikizika kwakukulu), zomwe zimatha kukhala ndi mphamvu yabwino yamakina pakati pa 100°C ndi 100°C.

3. Mikhalidwe yeniyeni ya ndondomekoyi ndi yakuti kuthamanga kwa preforming kumasiyana malinga ndi mawonekedwe ndi kukula kwa chinthucho. Koma nthawi zambiri chimagwiritsidwa ntchito. Kulongedza kwa Teflon kolukidwa ndi 8-34.3MPa, ndipo utomoni wokhala ndi filler ndi 29.4-93MPa. Pa ubweya waukulu wokhala ndi makulidwe pafupifupi 600mm mbali yokankhira, pakadali nthawi yogwira kupanikizika ya mphindi 20-30. Dziwani kuti kutentha kukatsika kuposa 185°C. Machubu a Teflon adzakhala ofooka. Gasket yoyera ya PTFE ndi chinthu chotseka choyera chomwe sichingaipitse chinthu chilichonse chomwe chingakhudze ndipo chingagwiritsidwe ntchito kwambiri m'mafakitale azakudya, zamankhwala ndi mafakitale ena.