M'zaka zaposachedwa, polytetrafluoroethylene (Teflon) ndi mtundu wazinthu zotsutsana ndi zonyansa zamagetsi zamagetsi zamagetsi zamafuta zamagetsi. Komabe, mavuto otsatirawa ayenera kusamalidwa makamaka nthawi yomwe PTFE alimbane payipi mzere ndi welded, apo ayi moyo wautumiki ndi chitetezo cha payipi yolimbidwa ndi PTFE zidzakhudzidwa. 1. Mukamakonza msonkhano, ndizoletsedwa kuti muwononge chitsulo. Ndizoletsedwa kugunda arc pazitsulo pazitsulo. 2. Mu gawo la fillet la fillet weld, kutalika kwa fillet weld kudzakhala kwakukulu kuposa 5mm, mawonekedwe oyesera adzakhala opitilira kapena ofanana ndi 3mm, ndipo gawo lamkati lidzakhala lalikulu kuposa kapena lofanana ndi 10mm. 3. Mukamawotcherera chipolopolo cha PTFE chitoliro cholimbidwa, ndibwino kutsatira njira yowotcherera yawiri yolumikizira. Izi zimafunikira mulingo waluso wa ogwira nawo ntchito, weld iyenera kukhala yosalala (yosalala kapena yosalala), yopanda pores, wowotcherera msoko ndi zochitika zophatikizira slag, ndipo kutalika kwa weld sikuyenera kukhala kopitilira 2mm. Pambuyo pa kuwotcherera, kuwaza komwe kumachitika chifukwa cha kuwotcherera kumachotsedwa kwathunthu. 4. Kuwotcherera kopitilira muyeso kuyenera kutengera kutsekemera kwa chitoliro cha PTFE, ndipo msoko wa weld sudzakhala ndi ming'alu kapena mosalekeza.

Polytetrafluoroethylene (PTFE) ndi amodzi mwa mayina omwe amagwiritsidwa ntchito kwambiri ndi polytetrafluoroethylene. PTFE payipi imagwiritsidwa ntchito payipi yopanga zosapanga dzimbiri, chifukwa chake moyo wa payipi ndiwotalika kuposa payipi ya labala kapena payipi ya labala wokutidwa ndi chitsulo chosapanga dzimbiri. Ili ndi zabwino zambiri pazinthu zopangira mphira.

Kalasi I: PTFE alimbane chitoliro molunjika ndi zovekera chitoliro

Amadziwika kuti chitoliro chapaulendo. Pochita izi, PTFE imagwiritsidwa ntchito kutembenuza bala. Ndioyenera kupanikizika kwabwino komanso koyendera mayendedwe abwino (monga mapaipi atatu onyamula zinyalala, ndi zina zambiri), ndipo sayenera kugwiritsidwa ntchito pa payipi yonyamula katundu (monga polowera ndi kutulutsa pampu ndi payipi yomwe ingabweretse mavuto ndi dontho kapena kuzizira mwadzidzidzi).

Awiri mfundo: dn25-500mm

Kutentha kwantchito: - 40-180oc

Kuthamanga Service: 1.6Mpa

Maphunziro II: PTFE zolimba alimbane chitoliro ndi zovekera chitoliro

Amadziwika kuti chitoliro cholimba chomangirizidwa ndi waya wachitsulo.

Kupanga ndondomeko: choyamba, zigawo zingapo za PTFE filimu ndi bala pa nkhungu, ndiye waya zitsulo (Ø 0.5-1mm) ndi mwauzimu bala pa PTFE filimu, ndiyeno zigawo zingapo za PTFE woonda filimu ali chilonda kunja kwa chitsulo waya, ndipo pomalizira pake atakulungidwa mu ng'anjo yopangira. Khoma lamkati la PTFE yolumikizidwa chitoliro chopangidwa ndi njirayi ndi yosalala, ndipo khoma lakunja ndiloyenda bwino chifukwa cha kuchuluka ndi mphamvu zotanuka zama waya achitsulo.

Danga pakati pa khoma lakunja la PTFE lolowera chitoliro ndi khoma lamkati la chitoliro chachitsulo ladzaza ndi utomoni (wopanda mpweya wotsalira). Utomoni wodzazidwa ukhoza kulumikizidwa mwamphamvu ndi chitoliro chachitsulo. Nthawi yomweyo, imatha kukulungidwa mwamphamvu pakhoma lakunja la PTFE yoyenda. Pambuyo pochiritsa utomoni wodzaza, mawonekedwe opindika amapangidwa omwe amakhala ndi khoma lakunja lakunja. Kapangidwe kameneka ndi kofanana ndi kuphatikiza mtedza ndi bawuti. Kumbali imodzi, imatha kuchepetsa komanso kulipiritsa kukulitsa kwamatenthedwe ndi kupindika kozizira kwa PTFE akalowa; Komano, kuuma kwazitsulo kwazitsulo kumatha kusintha kwambiri kukakamira kwa PTFE.

Awiri mfundo: dn25-200 mm

Kutentha kotentha: - 50-180oc

Ntchito kuthamanga: 0.5-1.6mpa

Mtundu wachitatu: PTFE Kankhani (Finyani) chitoliro mwamphamvu alimbane ndi chitoliro molunjika

Amadziwika kuti push (Finyani) wokhala ndi chitoliro chowongoka, chimagwiritsidwa ntchito m'maiko otukuka m'ma 1990.

Kupanga: choyamba, kunja PTFE ufa ntchito kukankhira (extrude) chitoliro, ndiyeno kukakamizidwa mu chitoliro kosatayana zitsulo (m'mimba mwake kunja kwa zapamadzi ndi pang'ono pang'ono kuposa awiri mkati mwa chitoliro zitsulo ndi 1.5- 2mm) kuti apange cholumikizira cholimba. Pofuna kuthana ndi vutoli, limayikidwa m'ng'anjo ndipo limatenthedwa mpaka 180oC kuti azitha kutentha nthawi zonse, kuti azitha kugwiritsidwa ntchito kutentha komwe kuli pansi pa 180oC. Nthawi yomweyo, kankhani (Finyani) shaft ya payipi

Mphamvu yolimba ndiyachidziwikire yabwinoko kuposa ya chubu chilonda. Mapaipiwo ali ndi kukana kwabwino kwakutsendereza kwabwino ndi koyipa.

Kusiyana pakati pa PTFE akalowa ndi akalowa labala

Zoyala za tetrafluoroethylene imagwiritsidwa ntchito pakuthana ndi kutupa kwa fluorine, kutentha kwambiri, asidi wamphamvu ndi kukana kwa alkali, kulumikizana kwabwino, moyo wautali komanso kukana kwamphamvu. Kupopera kwathunthu kwa tetrafluoroethylene ndi ntchito yaukadaulo kwambiri, njira zake zimayenda motani? 1. Musanapopera mbewu, pamwamba pake pamafunika kumenyedwa pamchenga ndi kumenyedwa, ndikuthira chopangira chapadera. 2. Kenako ufa wa fluoroplastic umayimbidwa ndi zida zamagetsi zamagetsi zamagetsi zamagetsi, komanso wofananira nawo wotsatsa pamwamba pa workpiece pansi pamagetsi amagetsi. 3. Pambuyo pophika kotentha kwambiri, tinthu tating'onoting'ono tomwe timasungunuka timasungunuka ndi mawonekedwe oteteza, omwe amakhala omata pamwamba pa chopangira. Mwachitsanzo, filimu yophimba 1 mm wandiweyani imafunikiranso kupopera ndi kuphika mobwerezabwereza nthawi 5-6. Nthawi zambiri, makulidwe pazipita akhoza sprayed kuti 2mm. PTFE akalowa ndi ukadaulo wogwiritsidwa ntchito kwambiri pakadali pano. Zimagwiritsa ntchito kukana kwa dzimbiri la fluorine, kuyera kwambiri, ukhondo, kusasunthika, osanyowa, kudzipaka, kuvala kukana, kutentha kwambiri komanso kutsika kwa kutentha, kutchinjiriza, ndi zina zambiri pakupanga, magetsi ake ndi zamakono amasinthidwa mokhazikika boma labwino kuti akwaniritse zokutira. Kupaka mabulosi kumatchedwanso matayala a labala. Ndikumamatira mbale yololedwa pamwamba pazitsulo ndi zomatira kuti tilekanitse sing'anga kuchokera pamatrix achitsulo kuti mutetezedwe. Mphira wachilengedwe ndi mphira wakapangidwe amagwiritsidwa ntchito polemba. Zambiri za mphira zomwe zimagwiritsidwa ntchito popangira zida zamagetsi ndizopangira zachilengedwe. Gawo lalikulu la mphira wachilengedwe ndi cis polima wa isoprene, yemwe amapukutidwa powonjezera sulfure. The labala vulcanized ali ena kutentha kukana ndi mphamvu mawotchi. Ikhoza kugawidwa kukhala mphira wofewa, wolimba pang'ono ndi mphira wolimba mitundu itatu. Mphira wolimba umakhala ndi kukana kwazitsulo, kukalamba komanso kulimba kwamphamvu ndi chitsulo. Lofewa mphira ali wabwino kuzizira kukana, kutentha kukana ndi kukana amadza, ndipo ali elasticity ena; theka lolimba mphira ndi pakati awiri. Kuphatikiza pa michere yolimba ndi zosungunulira zina, mphira wolimba umatha kukana kutupa kwa zidulo zambiri, organic acid, alkalis, salt ndi mowa. Chifukwa chake, zomangira zolimba za mphira zimagwiritsidwa ntchito ngati chinthu chosagwiritsa ntchito zachitsulo chotsutsana ndi dzimbiri. Vulcanized labala akhoza kugawidwa mu chisanadze vulcanized labala, yachibadwa kuthamanga madzi otentha vulcanized labala ndi masoka vulcanized labala. Mphira woyambirira umagwiritsidwa ntchito mu zida zazikulu zokometsera.