Kuti khalidwe rheological wa polima Sungunulani molondola yodziwika mu extrusion processing ndi wononga mphamvu kukameta ubweya kanthu..Njira yokhazikitsira ndi kukonza data,yomwe imagwiritsidwa ntchito kuyeza kumeta ubweya wa ubweya wa polima amasungunuka pogwiritsa ntchito screw extruder capillary.
Zida zambiri za polima zimakonzedwa mumtundu wosungunuka, womwe umaphatikizapo kusungunuka kwachitsulo ndi kusinthika, zomwe sizimangokhudza ndondomeko yokhayokha, komanso zimakhudzanso ntchito yomaliza ya mankhwala.Chifukwa chake, kuphunzira za rheological katundu wa zinthu za polima wakhala mutu wovuta kwambiri.Kuyeza kolondola kwa magawo a rheological ndi maziko a kafukufuku wozama wa rheological properties.
Kumeta ubweya wa ma viscosity ndi gawo lofunikira lodziwika bwino la rheological.Zomwe zimatchedwa kumeta ubweya wa ubweya wa polima kusungunula ndi chiŵerengero cha kumeta ubweya wa ubweya ndi kumeta ubweya wa ubweya umene umasungunuka umakhala mukuyenda.Kusungunuka kwa polima kumayambitsa pseudoplastic fluid, ndi kayendedwe kake kamakhala ndi zizindikiro za kumeta ubweya wa ubweya.Nthawi zambiri pamakhala kofunika kugwiritsa ntchito njira yokhotakhota pakati pa kumeta ubweya wa ubweya ndi kumeta ubweya wa ubweya, ndiye kuti kumeta ubweya wa ma viscosity sipekitiramu, kuwonetsa bwino mawonekedwe a polima asungunuke.
Njira yayikulu yoyezera kukhuthala kwa kusungunuka ndiyo kuyesa kusungunula kupyola mu chubu lalitali komanso lopyapyala la capillary, monga chubu chozungulira cha capillary.Kupsyinjika kwa kukameta ubweya kumatha kuwerengedwa poyesa kutsika kwapakati pa malekezero onse a kusungunuka pamene akudutsa mu chubu cha capillary.Mlingo wa kukameta ubweya ukhoza kuwerengedwa poyesa kusungunuka kwa kusungunuka pa nthawi ya unit.Choncho kusungunuka mamasukidwe akayendedwe angapezeke.
Njira yodziwika bwino yosungunulira mu capillary chubu ndiyo kugwiritsa ntchito piston.Ubwino wa njirayi ndikuti IMAGWIRITSA NTCHITO zida zoyesera zochepa ndipo imatha kupeza kupsinjika kwameta ubweya wambiri.Kuthamanga kwapamwamba kwa capillary rheometer kumachokera pa mfundo iyi.Komabe, kuipa kwa njira yoyeserayi ndikuti zinthuzo sizingayesedwe pansi pazochitika zenizeni zowonongeka, ndipo zimakhala zovuta kupeza rheological katundu wa polima kusungunuka pamene akukonzedwa.Makamaka pophunzira kusakaniza kusinthidwa kwa zinthu zingapo za polima, kusungunuka kwa polima kumafunikira kumeta mwamphamvu kwa screw kuti akwaniritse cholinga chosakanikirana.Kuthamanga kwambiri kwa capillary rheometer sikoyenera kuyesa zipangizo zoterezi.
The wononga extrusion capillary rheological test chipangizo akhoza kuthetsa mavuto pamwamba.Chipangizochi AMAGWIRITSA NTCHITO mphamvu ya wononga kuti polima isungunuke kudzera mu chubu cha capillary.Choncho, kukameta ubweya kukhuthala kwa polima kusungunuka akhoza kuyeza pansi zinthu pafupi processing weniweni.Njirayi ndiyoyenera kwambiri kuyeza mawonekedwe a rheological a zida za thermoplastic ndi zosakaniza zake.Chifukwa muyesowo umatengera malo enieni oyesera, magawo oyesera omwe apezeka amatha kufotokozera bwino momwe zinthu zimagwirira ntchito pokonza.
Shear viscosity spectra ya ma polima amasungunuka amatha kuyeza pogwiritsa ntchito zida zapadera zoyesera, monga ma capillary rheometers apamwamba, kapena kusintha kophatikizana.Komabe, zidazi ndizokwera mtengo komanso zocheperako pakugwiritsa ntchito moyenera, makamaka popanga mafakitale akuluakulu.M'malo mwake, sikoyenera kudalira chida chapadera choyesera, malinga ngati kumeta ubweya wa ma viscosity test mfundo, mutha kugwiritsa ntchito kachipangizo kakang'ono kamodzi kokha.extruderndi nkhungu ya capillary, imapanga chipangizo chotsika mtengo cha shear viscosity spectrum test.Kuphatikizidwa ndi kukonza kwapakompyuta, kumeta ubweya wa ma viscosity sipekitiramu ya polymer melt imatha kupezeka mosavuta komanso mwachangu.Njirayi ndi yoyenera makamaka kwa mabizinesi ang'onoang'ono ndi apakatikati kuti achite chitukuko cha mankhwala ndi kuyang'anira zopangira.
Nthawi yotumiza: Jul-26-2019