Njira zinayi zoyeretsera screw ya twin-screw extruder, mumagwiritsa ntchito iti?

Ma Twin-screw extruder ndi makina opangira ma workhorse pamunda wophatikizira, ndipo magwiridwe antchito awo apamwamba komanso kusinthika kwawo ndiubwino wamalo awo. Itha kuphatikiza zowonjezera ndi zodzaza zosiyanasiyana kuti mukwaniritse mawonekedwe ndi ma pellet osiyanasiyana ndi magwiridwe antchito osiyanasiyana.

Ngakhale zowonjezera zosiyanasiyana ndi zodzaza zimatha kukonzedwa kuti ziwonjezeke, njira zina zopezera zinthuzi zingayambitsenso kuipitsidwa ndi kutsika kapena kutsika kwapang'onopang'ono m'malo ambiri mumbiya yonse.

Munjira yopitilira ngati extrusion, kuipitsidwa kumatha kukhala ndi zotsatira zoyipa. Kutsuka mu extrusion kumakhala kovuta kwambiri kuposa njira zina, ndipo mapasa-screw extruders amakumana ndi zovuta zazikulu chifukwa dongosololi ndi lovuta kwambiri kuposa extruder single-screw.

Choyamba, tiyeni tiwone njira zoyeretsera za mapasa-screw extruders.

Njira yoyeretsera utomoni:

Kugwiritsa ntchito utomoni wa poliyesitala kapena utomoni wa epoxy poyeretsa nthawi zambiri umagwiritsidwa ntchito poyeretsa zida zatsopano kapena chotulutsacho chikagwiritsidwa ntchito kwakanthawi, chifukwa zinthu zina zimakhalabe pa wononga kapena mbiya ndi gel osakaniza, kuthamanga kwa zinthu kumachepa, komanso mtundu. kusiyana kwa mtundu kusintha zosiyanasiyana ndi lalikulu. Njirayi ingagwiritsidwe ntchito. Masiku ano, ndi chuma chotukuka kwambiri, palibe kusowa kwa zotsuka zosiyanasiyana zotsuka (zida zotsukira) pamsika, zomwe zambiri zimakhala zodula komanso zimakhala ndi zotsatira zosiyanasiyana.

Kaya mugwiritse ntchito zotsukira malonda zimatengera opanga osiyanasiyana ndi momwe amapangira; Makampani opanga mapulasitiki amathanso kugwiritsa ntchito ma resin osiyanasiyana ngati zida zoyeretsera molingana ndi momwe amapangira, zomwe zimatha kupulumutsa ndalama zambiri pagawoli.

Gawo loyamba pakuyeretsa wononga ndikuzimitsa pulagi ya chakudya, ndiye kuti, kutseka doko la chakudya pansi pa hopper; ndiye chepetsani liwiro la screw mpaka 15-25r / min ndikusunga liwiro ili mpaka kusungunula kumayenda kumapeto kwa kufa kumasiya kuyenda. Kutentha kwa magawo onse otentha a mbiya kuyenera kukhazikitsidwa pa 200 ° C. Mgolo ukafika kutentha uku, yambani kuyeretsa nthawi yomweyo.

Kutengera ndi njira ya extrusion (pangakhale kofunikira kuchotsa kufa kuti muchepetse chiopsezo chambiri kutsogolo kwa extruder), kuyeretsa kuyenera kuchitidwa ndi munthu m'modzi: woyendetsa amawona liwiro la wononga ndi torque kuchokera pagulu lowongolera. , ndikuwona kuthamanga kwa extrusion kuti kuwonetsetsa kuti kupanikizika kwadongosolo sikuli kokwera kwambiri. Panthawi yonseyi, liwiro la screw liyenera kusungidwa mkati mwa 20r / min. Pogwiritsira ntchito mitu yotsika kwambiri, musachotse mutu wakufa kuti muyeretsedwe kaye. Imani ndikuchotsa mutu wakufa nthawi yomweyo pamene extrudate yasinthidwa kuchoka ku processing resin kupita ku utomoni woyeretsera, ndiyeno yambitsaninso wononga (liwiro mkati mwa 10r / min) kuti utomoni wotsalira utuluke.

Disassembly Guide:

1. Onjezani pamanja zinthu zotsuka kuchokera ku doko lotayira mpaka mtundu wa chingwe chotulutsira ufanane ndi ma pellets ochapira, siyani kudyetsa, chotsani zinthuzo, ndikuyimitsa kuzungulira kwa screw screw extruder screw;

2. Tsegulani wononga wononga extruder kufa mutu ndi kuyamba kuyeretsa;

3. Tembenuzirani sikona yotuluka ndi kuchotsa mbale kuti mutsitse zotsalira zochapira mumgolo ndi kuyeretsa mbale;

4. Imani ndikutulutsa wononga kuti muwone ngati yatsukidwa, ndikuchotsani pamanja zinthu zotsalira pa screw. Ikaninso wononga; onjezani zinthu zatsopano kuti mutsuke zotsalira zotsuka mu mbiya ndikuyimitsa kuzungulira kwa wononga;

1. Ikani mbale ya orifice ndi kufa mutu wa twin-screw extruder kuti mumalize ntchito yoyeretsa ya twin-screw extruder.

Njira yotsuka pamoto:

Kugwiritsa ntchito moto kapena kuwotcha kuchotsa pulasitiki yokhazikika pa screw ndiyo njira yodziwika bwino komanso yothandiza pamagawo opangira pulasitiki. Gwiritsani ntchito blowtorch kuti muyeretse wononga nthawi yomweyo mutatha kugwiritsa ntchito, chifukwa panthawiyi wonongayo imanyamula kutentha kuchokera pakukonza, kotero wononga Kugawa kwa kutentha kumakhalabe yunifolomu. Koma musagwiritse ntchito lawi la acetylene kuyeretsa wononga. Kutentha kwa lawi la acetylene kumatha kufika 3000 ° C. Kugwiritsa acetylene lawi kuyeretsa wononga sikungowononga zitsulo katundu wononga, komanso kwambiri zimakhudza mawotchi kulolerana wononga.

Ngati lawi la acetylene lisandulika kukhala mtundu wabuluu wokhazikika pakuwotcha gawo lina la screw, zikutanthauza kuti mawonekedwe achitsulo a gawo ili la screw asintha, zomwe zingayambitse kuchepa kwa kukana kwa gawo ili, komanso kupezeka kwa abrasion pakati pa anti-wear layer ndi matrix. Metal peeling. Kuphatikiza apo, kutentha kwanuko ndi lawi la acetylene kumapangitsanso kutenthedwa mbali imodzi ya screw, kupangitsa kuti wononga. Zomangira zambiri zimapangidwa ndi chitsulo cha 4140.HT ndipo zimakhala zolimba kwambiri, nthawi zambiri mkati mwa 0.03mm.

Kuwongoka kwa screw nthawi zambiri kumakhala mkati mwa 0.01mm. Chowotchacho chikaphikidwa ndikuzizidwa ndi lawi la acetylene, nthawi zambiri zimakhala zovuta kubwerera ku kuwongoka koyambirira. Njira yolondola komanso yothandiza: Gwiritsani ntchito blowtorch kuyeretsa wononga mukangogwiritsa ntchito. Chifukwa screw imanyamula kutentha kuchokera pakukonza panthawiyi, kugawa kwa kutentha kwa screw kumakhala kofanana.

Njira yotsuka madzi:

Kuchapira screw: Makina ochapira omata okhawo amagwiritsa ntchito mphamvu ya kinetic yozungulira madzi ndi mphamvu yozungulira ya screw kuti ikwaniritse kuvula kwa madigiri 360 popanda ngodya zakufa. Zili ndi ntchito yabwino kwambiri ndipo siziwononga mawonekedwe a wononga. Imazindikira ukadaulo watsopano wotsuka wononga m'njira yosakonda zachilengedwe, yothandiza komanso yopulumutsa mphamvu. Ndiwoyenera kuvula mokakamiza ndikuchotsa zida zosiyanasiyana za polima, chifukwa chake ndiukadaulo wobiriwira wokhala ndi zoyeretsa zabwino.