Screw ndiyo inonyanya kukosha chikamu cheextruder, inogona kunzi mwoyo we extruder, inogona kukanganisa zvakananga kushandiswa kweextruder uye kubudirira kwekugadzira.Kuita kwe screw kunotaridza kugadzirwa, plasticizing mhando, kupararira kwekuzadza, kunyunguduka tembiricha uye mashandisiro emagetsi eextruder.
Screw ndiyo inonyanya kukosha chikamu che extruder, inogona kunzi moyo weiyo extruder, inogona kukanganisa zvakananga kushandiswa kweiyo extruder uye kugona kwekugadzira.Kuita kwe screw kunotaridza kugadzirwa, plasticizing mhando, kupararira kwekuzadza, kunyunguduka tembiricha uye mashandisiro emagetsi eextruder.Kuburikidza nescrew kutenderera, iyopolymer plastiki inogona kubudiswa, uye plastiki inogona kufamba, kumanikidza uye kuwana kumwe kupisa kubva mukukwesha muhumburumbira.Munguva yekufamba kwecylinder, plastiki inogona kusanganiswa uye plastiki.
- 1.The screw chimiro chepolymer plasticizing uye kusanganisa extruder.
Panguva yekugadzira, kana zvinhu zvichienda kumberi pamwe chete ne screw, inosangana nekuchinja kwekushisa, kudzvanywa, viscosity, nezvimwe, izvo zvakasiyana mukati mehurefu hwakazara hwe screw.Kune zvitatu zvemuviri zvepolymer plastiki mune extruder: girazi mamiriro, yakakwirira elastic mamiriro uye viscous kuyerera mamiriro.Kuti uenderane nezvinodiwa nenyika dzakasiyana uye zvinoenderana nekuchinja kwehunhu hwechinhu, screw inogona kukamurwa kuita zvikamu zvitatu: chikamu chekudya, chikamu che compress uye homogenize chikamu.Basa rechikamu chekudya ndechekudyisa zvinhu zvinopihwa nehopper kune chikamu chekumanikidza.Munguva yekufamba kwepurasitiki, kazhinji inoramba yakasimba uye inonyungudika zvishoma nekuda kwekupisa.Kureba kwechikamu chekudya kunosiyana nemhando yepurasitiki.Compression chikamu (chikamu chekufambisa) ibasa rekumanikidza zvinhu zvenyama, kuitira kuti zvinhu kubva mukusimba kuita kunyungudutswa, zvakanaka kubva mumhepo mune izvo zvinhu;Kuti uenderane nehunhu hwekudzikisa vhoriyamu paunenge uchisundidzira gasi muzvinhu kudzoka kuchikamu chekudyisa, kudzvanya zvinhu uye kunyungudusa zvinhu, screw iri muchikamu ichi inofanira kuburitsa hukuru hwekuveura uye kudzvanywa kwepurasitiki.Basa rechikamu chehomogenizing (metering chikamu) ndechekudyisa zvinhu zvakanyungudutswa kumusoro wemuchina pane inogara vhoriyamu (vhoriyamu) uye kudzvanywa kuitira kuti iumbwe mumuromo mold.Iro vhoriyamu ye spiral groove muchikamu chehomogenizing chakafanana neicho chiri muchikamu chekudya.
Kuti udzivise kuchengetwa kwezvinhu mumagumo escrew musoro wakafa kona, zvichikonzera kuora, screw head inowanzo gadzirwa kuita koni kana semicircle;Imwe screw homogenization chikamu ndeye - iyo yekumusoro yakatsetseka muviri unonzi torpedo musoro, asi kune zvakare akavezwa grooves kana milling mapatani.Musoro wetorpedo une basa rekukurudzira nekudzora zvinhu, kubvisa pulsating (pulsating) chiitiko mukuyerera, kuderedza ukobvu hwechinyorwa chemukati nekuwedzera kudzvanywa kwezvinhu, kuvandudza mamiriro ekudziya, uye kuwedzera kuvandudza screw plasticizing kunyatsoita. .Zvinoenderana nedzidziso yekunyungudika yekufambisa, melt inoyerera muchikamu chescrew homogenization mune mafomu mana, uye kuyerera kwezvinhu zvakanyungudutswa muscrew groove musanganiswa wezvina izvi zvinoyerera: kuyerera kwakanaka - plastiki inonyunguduka inoyerera pakati pehumburumbira uye sikururu munzira. yescrew groove yakananga kumusoro wemuchina.Counter-current flow direction inopesana neinoyerera yakanaka, iyo inokonzerwa nekudzvinyirira gradient kunokonzerwa nekupikisa kwemhino, porous plate uye filter plate.Kuyerera kwekunyunguduka kune imwe nzira perpendicular kumadziro eshinda kunokanganisa kusanganiswa uye kupisa kwekupisa kwekunyunguduka panguva ye extrusion.Leakage flow - kuyerera kwemashure kunoumbwa nepressure gradient pakati pe screw ne silinda, pamwe neaxial direction ye screw.Mhando dzakasiyana dzekuyerera dzine zvakakosha mhedzisiro pakusanganisa kufanana kwemapolymer.
Screw dhayamita uye kutsunga kwechimiro chechimiro, kunyanya zvichienderana nekugadzirwa kwechigadzirwa chinobuda, zvakatemwa, marudzi ezvishandiso zvakagadziriswa uye akasiyana masikirini maitiro ekuona.Kazhinji, chikamu chekudyisa che screw chine goro rakadzika uye kudzika kwegoro hakuna kuchinjika, compression chikamu (yakanyungudika chikamu) chescrew groove kudzika munzira yekubuda kubva pakadzika kuenda kukadzika, metering chikamu (homogenized chikamu) che screw. ine mugodhi usina kudzika uye kudzika kwegonhi hakuna kuchinjwa.
- 2.The screw material.
Screw ndiyo yakakosha chikamu che extruder, sezvo iyo screw inofanirwa kuve nekushisa kwekushisa kwepamusoro, kusamira kwekudzivirira, kusagadzikana kwecorrosion, simba rakawanda uye humwe hunhu, panguva imwe chete inofanirwa kuve nekuita kwakanaka kwekucheka, kupisa kupisa kusara kwekushushikana, kudiki kwemafuta deformation uye. mamwe maitiro.Kune extruder screw material, pane zvinodiwa chaizvo sezvinotevera:
- (1) . High mechanical properties.Kuve nesimba rakakwana, kujairana nekupisa kwakanyanya, kumanikidza kwakanyanya kushanda mamiriro, kunatsiridza hupenyu hwebasa re screw.
- (2).Good machining performance.Yakanaka machining kuita uye kupisa kurapwa kuita.
- (3) .Good corrosion uye kupfeka kuramba.
- (4).Zviri nyore kudhirowa.
Nguva yekutumira: Jul-15-2019