Asanayambe njira yayikulu yowonjezera, chakudya chosungidwa cha polymeric chimasakanizidwa ndi zowonjezera zosiyanasiyana monga zolimbitsa thupi (kutentha, kukhazikika kwa oxidative, kukhazikika kwa UV, ndi zina), inki yamtundu, zoletsa moto, zodzaza, zopangira mafuta, zowonjezera, etc. mankhwala khalidwe ndi processability. Kuphatikiza ma polima ndi zowonjezera kumathandizanso kukwaniritsa zomwe mukufuna.
Kwa machitidwe ena a utomoni, njira yowonjezera yowumitsa kuti mupewe kuwonongeka kwa polima chifukwa cha chinyezi nthawi zambiri amagwiritsidwa ntchito. Kumbali inayi, kwa omwe safuna kuyanika musanagwiritse ntchito, amayenera kuyanikabe makamaka akasungidwa m'zipinda zozizira ndipo mwadzidzidzi amayikidwa pamalo otentha motero kuyambitsa kusungunuka kwa chinyezi pamwamba pa zinthuzo.
Polima ndi zowonjezera zitasakanizidwa ndikuwumitsidwa, kusakanizako ndi mphamvu yokoka imadyetsedwa mu hopper ya chakudya komanso kudzera pakhosi.
Vuto limodzi lodziwika pogwira zinthu zolimba monga ufa wa polima ndikuyenda kwake. Nthawi zina, kulumikiza zinthu mkati mwa hopper kumatha kuchitika. Chifukwa chake, njira zapadera monga jakisoni wa nayitrogeni wapakatikati kapena mpweya uliwonse wolowera angagwiritsidwe ntchito kusokoneza ma polima aliwonse omwe ali pamwamba pa hopper ya chakudya kuti zitsimikizire kuyenda bwino kwa zinthuzo.
Zinthuzo zimatsikira kumtunda wa annular pakati pa screw ndi mbiya. Zinthuzo zimamangidwanso ndi screw channel. Pamene screw ikuzungulira, polima imatumizidwa patsogolo, ndipo mphamvu zotsutsana zimachitapo kanthu.
Migoloyo nthawi zambiri imatenthedwa ndikuwonjezera kutentha pang'onopang'ono. Pamene chisakanizo cha polima chimayenda kuchokera kumalo odyetserako chakudya kupita ku metering zone, mphamvu zolimbana ndi kutentha kwa mbiya zimapangitsa kuti zinthuzo zikhale zapulasitiki, zosakanizidwa mowirikiza, ndi kukanda pamodzi.
Potsirizira pake, pamene kusungunula kukuyandikira kumapeto kwa extruder, kumadutsa poyamba pazithunzi. Chophimbacho chimagwiritsidwa ntchito kusefa zida zilizonse zakunja mu thermoplastic melt. Zimatetezanso dzenje la mbale kuti lisatseke. Chosungunukacho chimakakamizika kuchoka mukufa kuti chikhale chofanana ndi kufa. Nthawi yomweyo itakhazikika ndikuchotsedwa pa extruder pa liwiro lokhazikika.
Njira zina monga chithandizo chamoto, kusindikiza, kudula, kusungunula, kuchotsa fungo, ndi zina zotero. The extrudate ndiye adzayang'aniridwa ndikupitiriza kulongedza ndi kutumiza ngati zofunikira zonse zamalonda zakwaniritsidwa.
Nthawi yotumiza: Dec-08-2022
