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

Makina otulutsira zinthu okhala ndi screw ziwiri ndi omwe amagwiritsidwa ntchito kwambiri popanga zinthu zosiyanasiyana, ndipo magwiridwe antchito awo apamwamba komanso kuthekera kwawo kusintha zinthu ndi ubwino wa malo awo. Amatha kuphatikiza zowonjezera ndi zodzaza zosiyanasiyana kuti apange mawonekedwe ndi zinthu zosiyanasiyana za pellet ndi magwiridwe antchito osiyanasiyana.

Ngakhale zowonjezera zosiyanasiyana ndi zodzaza zitha kukonzedwa kuti zichotsedwe, njira zina zopezera zinthuzi zingayambitsenso mavuto okhudzana ndi kuipitsidwa ndi kuyenda kochepa kapena kupanikizika kochepa m'malo ambiri m'mbiya yonse.

Mu njira yopitilira monga kutulutsa madzi, kuipitsidwa kumatha kukhala ndi zotsatirapo zoyipa. Kutulutsa madzi m'thupi kumakhala kovuta kwambiri kuposa njira zina, ndipo zotulutsa madzi m'thupi ziwiri zimakumana ndi zovuta zazikulu chifukwa dongosololi ndi lovuta kwambiri kuposa chotulutsa madzi chokhala ndi screw imodzi.

Choyamba, tiyeni tiwone njira zoyeretsera za ma extruder awiri.

Njira yoyeretsera utomoni:

Kugwiritsa ntchito utomoni wa polyester kapena utomoni wa epoxy poyeretsa nthawi zambiri kumagwiritsidwa ntchito poyeretsa zida zatsopano kapena pambuyo poti chotulutsira chagwiritsidwa ntchito kwa nthawi yayitali, chifukwa zinthu zina zimatsalira pa screw kapena mbiya ndi gel, liwiro la kutulutsa zinthu limachepa, ndipo kusiyana kwa mitundu ya mitundu yosintha mitundu ndi kwakukulu. Njirayi ingagwiritsidwe ntchito. Masiku ano, chifukwa cha chuma cha zinthu zotsogola kwambiri, palibe kusowa kwa zotsukira zosiyanasiyana (zipangizo zotsukira zokulungira) pamsika, zomwe zambiri zimakhala zodula komanso zimakhala ndi zotsatira zosiyana.

Kugwiritsa ntchito makina oyeretsera amalonda kumadalira opanga osiyanasiyana komanso momwe amapangira; makampani opanga mapulasitiki amathanso kugwiritsa ntchito ma resin osiyanasiyana ngati zipangizo zoyeretsera zomangira malinga ndi momwe amapangira, zomwe zingapulumutse ndalama zambiri pa chipangizocho.

Gawo loyamba poyeretsa sikuru ndi kuzimitsa pulagi yodyetsera, kutanthauza kutseka polowera chakudya pansi pa hopper; kenako chepetsani liwiro la sikuru kufika pa 15-25r/min ndikusunga liwiroli mpaka kusungunuka kwa madzi kumapeto kwa die kutayike. Kutentha kwa malo onse otenthetsera a mbiya kuyenera kukhazikika pa 200°C. Mbiya ikafika kutentha kumeneku, yambani kuyeretsa nthawi yomweyo.

Kutengera ndi njira yotulutsira (kungakhale kofunikira kuchotsa die kuti muchepetse chiopsezo cha kupanikizika kwambiri kumapeto kwa extruder), kuyeretsa kuyenera kuchitidwa ndi munthu m'modzi: wogwiritsa ntchito amawona liwiro la screw ndi torque kuchokera pa control panel, ndikuwona kuthamanga kwa extrusion kuti atsimikizire kuti kuthamanga kwa system sikuli kokwera kwambiri. Pa nthawi yonseyi, liwiro la screw liyenera kusungidwa mkati mwa 20r/min. Mukagwiritsa ntchito mitu ya die yotsika mphamvu, musachotse mutu wa die poyamba kuti muyeretse. Imani ndikuchotsa mutu wa die nthawi yomweyo pamene extrudate yasinthidwa kwathunthu kuchoka ku utomoni wokonza kukhala utomoni woyeretsa, kenako yambitsaninso screw (liwiro mkati mwa 10r/min) kuti utomoni wotsala wotsukira utuluke.

Buku lotsogolera kusokoneza:

1. Onjezani zovala zotsukira pamanja kuchokera pa doko lotulutsira madzi mpaka mtundu wa nsalu yotulutsira madzi utafanana ndi wa zinthu zotsukira madzi, siyani kudya, tulutsani zinthuzo, ndikuyimitsa kuzungulira kwa screw extruder ya twin-screw;

2. Tsegulani mutu wa die extruder ndikuyamba kutsuka;

3. Tembenuzani screw extruder ya twin-screw ndikuchotsa mbale ya orifice kuti mutulutse zinthu zotsala mu mbiya ndikutsuka mbale ya orifice;

4. Imani ndi kutulutsa screw kuti muwone ngati yatsukidwa, ndipo chotsani pamanja zinthu zotsala pa screw. Ikaninso screw; onjezerani zinthu zatsopano kuti mutulutse zinthu zotsala mu mbiya ndikuletsa kuzungulira kwa screw;

1. Ikani mbale ya orifice ndi mutu wa die wa chotulutsira cha twin-screw kuti mumalize ntchito yoyeretsa chotulutsira cha twin-screw.

Njira yoyeretsera yophikidwa pamoto:

Kugwiritsa ntchito moto kapena kuwotcha kuchotsa pulasitiki yomwe yaikidwa pa sikulu ndiyo njira yodziwika bwino komanso yothandiza kwambiri pamakina opangira pulasitiki. Gwiritsani ntchito blowtorch kutsuka sikulu nthawi yomweyo mukangogwiritsa ntchito, chifukwa panthawiyi sikulu imanyamula kutentha kuchokera ku zomwe zachitika pokonza, kotero sikulu. Kugawa kutentha kumakhala kofanana. Koma musagwiritse ntchito lawi la acetylene kutsuka sikulu. Kutentha kwa lawi la acetylene kumatha kufika 3000°C. Kugwiritsa ntchito lawi la acetylene kutsuka sikulu sikungowononga mphamvu zachitsulo za sikulu, komanso kumakhudza kwambiri kulolerana kwa makina kwa sikulu.

Ngati lawi la acetylene likhala labuluu losatha pophika gawo lina la sikuru, zikutanthauza kuti kapangidwe ka chitsulo ka gawo ili la sikuru kasintha, zomwe zipangitsa kuti gawoli lisamavutike kutopa, komanso kuti pakhale kusweka pakati pa gawo loletsa kutopa ndi matrix. Kutupa kwa chitsulo. Kuphatikiza apo, kutentha kwapafupi ndi lawi la acetylene kungayambitsenso kutentha kwambiri mbali imodzi ya sikuru, zomwe zimapangitsa kuti sikuru ipindike. Ma screw ambiri amapangidwa ndi chitsulo cha 4140.HT ndipo amakhala ndi zolekerera zolimba kwambiri, nthawi zambiri mkati mwa 0.03mm.

Kuwongoka kwa sikuru kumakhala mkati mwa 0.01mm. Sikuru ikaphikidwa ndikuziziritsidwa ndi lawi la acetylene, nthawi zambiri zimakhala zovuta kubwerera ku kuwongoka koyambirira. Njira yolondola komanso yothandiza: Gwiritsani ntchito blowtorch kuti muyeretse sikuru nthawi yomweyo mukangogwiritsa ntchito. Chifukwa sikuru imanyamula kutentha kuchokera ku njira yokonzera panthawiyi, kugawa kutentha kwa sikuru kumakhalabe kofanana.

Njira yotsukira madzi:

Kutsuka ndi sikuru: Makina ochapira ndi sikuru omwe amagwiritsa ntchito mphamvu ya kayendedwe ka madzi komanso mphamvu ya kayendedwe ka sikuru kuti akwaniritse kutsuka ndi madigiri 360 popanda ma ngodya osalimba. Amagwira ntchito bwino kwambiri ndipo sawononga kapangidwe ka sikuru. Amachita ukadaulo watsopano wotsuka ndi sikuru m'njira yosawononga chilengedwe, yothandiza komanso yopulumutsa mphamvu. Ndi yoyenera kuchotsa ndi kuchotsa zinthu zosiyanasiyana za polima, kotero ndi ukadaulo wobiriwira wokonza zinthu wokhala ndi zotsatira zabwino zoyeretsa.