Zotsatirazi ndi mfundo zofunika kukumbukira zokhudza extrusion.Ayenera kuthandiza kusunga ndalama, kutulutsa zinthu zabwino kwambiri, komanso kugwiritsa ntchito zida mwaluso.
4. Chakudyacho chimagwira ntchito ngati chozizirira.Extrusion ndi kusamutsidwa kwa mphamvu kuchokera ku mota-ndipo nthawi zina zotenthetsera-kupita ku pulasitiki yoziziritsa, motero amatembenuza kuchoka ku cholimba kupita kusungunuka.Chakudya cholowera ndi chozizirirapo kuposa mbiya ndi zomangira pagawo la chakudya.Malo a mbiya mu feedzone, komabe, amakhala pamwamba pa pulasitiki yosungunuka.Ndi utakhazikika ndi kukhudzana ndi kulowa particles, koma anali otentha ndi conduction kutentha chammbuyo kuchokera yotentha kutsogolo kumapeto, komanso ankalamulira mbiya Kutentha.Ngakhale kutsogolo kukakhala kotentha chifukwa cha kukangana kwa viscous ndipo palibe kutentha kwa mbiya komwe kumafunikira, zowotchera zakumbuyo zingafunikire kuyatsidwa.Kupatulapo chofunika kwambiri ndi grooved -feed mbiya, ntchito pafupifupi kokha HDPE.
Mizu yothiramo imatsitsidwanso ndi chakudya ndipo imatsekeredwa kuchokera pakhoma la mbiya ndi tinthu tating'ono ta pulasitiki (ndi mpweya pakati pawo).Ngati wononga mwadzidzidzi tayima, chakudya chimayimanso, ndipo zomangirazo zimatenthera mu feedzone kutentha kumabwerera chammbuyo kuchokera kumapeto kotentha kwambiri.Izi zingapangitse kuti tinthu tating'ono ting'onoting'ono ting'onoting'ono, kapena kutsekeka.
5. Gwirani ku mbiya ndikuzembera pa screw, mu feedzone.Pakuti pazipita zolimba kupereka mu feedzone yosalala - mbiya, single-screw extruder, particles ayenera kumamatira mbiya ndi kuzembera pa screw.Ngati tinthu tating'onoting'ono timamatira pa wononga muzu palibe chochotsa;kuchuluka kwa njira ndi kuchuluka kwa zolimba zimachepetsedwa.Kumamatira ku muzu nakonso kumakhala kosafunika chifukwa pulasitiki imatha kuphika pamenepo ndikutulutsa ma gels ndi tinthu tating'ono tofanana, kapena kumamatira ndikusweka mokhazikika ndikusintha kofananirako mulingo wotulutsa.
Mapulasitiki ambiri mwachibadwa amazembera pamizu chifukwa amabwera mozizira ndipo muzu wake sutenthedwa ndi kukangana ngati khoma la mbiya.Zida zina zimatha kumamatira kuposa zina: PVC yopangidwa ndi pulasitiki kwambiri, amorphous PET, ndi ma polyolefin copolymers okhala ndi zomatira zomwe nthawi zambiri zimafunidwa pamapeto ake.
Ponena za mbiya, pulasitiki iyenera kumamatira pamenepo kuti ichotsedwe ndikukankhidwa kutsogolo ndi zowuluka.Payenera kukhala mikangano yayikulu pakati pa particles ndi mbiya, yomwe imakhudzidwa kwambiri ndi kutentha kwa mbiya kumbuyo.Ngati tinthu tating'ono ting'onoting'ono sitikanamatira timangogudubuzika osapita patsogolo -ndichifukwa chake chakudya choterera sichili chabwino.
Kukangana pamwamba si chinthu chokhacho chomwe chimakhudza infeed.Tinthu tambirimbiri sitikhudza mbiya kapena muzu wa screw, kotero payenera kukhala mikangano ndi makina ndi zomatira zolumikizana mkati mwa pellet mass.
Migolo yodulidwa ndi nkhani yapadera.The grooves ali mu feedzone, amene thermally olekanitsidwa ndi ena onse mbiya ndi kwambiri madzi - utakhazikika.Maulendo apandege amakankhira ma pellets pansi pa ma grooves ndipo motero amakhala ndi kuthamanga kwambiri pamtunda waufupi modabwitsa.Kuluma kochulukiraku kumathandizira kutsika kwa screw rpm pakupanga komweko, chifukwa chake kutentha kocheperako kumapangidwa kumapeto kwenikweni, kumapereka kutentha kocheperako.Izi zitha kutanthauza kupanga mwachangu mumizere yoziziritsa -yoyimba pang'ono.Ma groove ndi oyenerera kwambiri HDPE, yomwe ndi mapulasitiki oterera kwambiri kuposa mapulasitiki wamba onse kupatula a fluoroplastics.
6. Zinthu zakuthupi ndiye zowononga kwambiri.Nthaŵi zina ndalama zakuthupi zimafika pa 80 peresenti ya ndalama zonse zopangira zinthu—kuposa zinthu zina zonse—kupatulapo zinthu zochepa monga ma catheter akuchipatala kumene kutsimikizira ubwino ndi kulongedza zinthu n’kofunika kwambiri.Mfundo imeneyi mwachibadwa imatsogolera ku mfundo zina ziwiri: Mapurosesa agwiritsenso ntchito zochepetsera zambiri momwe angathere m'njira zolowa m'malo mwa zinthu zomwe zidalipo kale, ndikusunga zololera zamtundu wapafupi kwambiri kuposa momwe makulidwe ake amawonongedwera komanso chilichonse chomwe chingawononge kuwonongeka kwa chinthu.
Nthawi yotumiza: May-17-2017