Kev ua haujlwm thiab kev ua haujlwm ntawm cov ntsia hlau ntxaib xov

1, Segmentation thiab kev ua haujlwm ntawm cov ntsia hlau
1.1. Segmentation ntawm twin ntsia hlau:
Nws feem ntau muab faib ua tsib ntu: seem conveying, seem melting, seem seem, seem seem thiab homogenizing seem:
1. Conveying seem, conveying cov ntaub ntawv kom tsis txhob overflow;
2. Melting seem, uas tag nrho melts thiab pib homogenizes cov ntaub ntawv los ntawm kev hloov tshav kub thiab kev sib txhuam shearing;
3. Cov khoom sib xyaw ntxiv ua kom zoo dua qub thiab sib koom ua ke qhov loj ntawm cov khoom siv los tsim cov qauv zoo tagnrho, suav nrog kev sib xyaw ua haujlwm ntawm kev faib tawm thiab kev sib cais;
4. Cov seem tso pa tawm cov dej vapor, cov khoom hnyav molecular thiab lwm yam impurities.
5. Homogenization (metering) ntu, kev thauj mus los thiab kev siv zog, tsim kom muaj qee qhov siab, ua rau cov khoom ntawm lub qhov ncauj tuag muaj qee qhov ntom ntom, thiab sib xyaw ntxiv, thaum kawg ua tiav lub hom phiaj ntawm du extrusion thiab granulation.
1.2. Qhov sib txawv ntawm kev faib khoom (distribution) thiab decentralized mixing
Qhov sib txawv tseem ceeb ntawm ob yog qhov kev faib tawm yog ua tiav los ntawm kev lim dej, thaum dispersion tiav los ntawm kev ntxhov siab.
1. Kev faib tawm thiab kev sib xyaw ua rau cov yaj sib cais thiab rov ua dua, thiab ua rau txhua qhov sib npaug sib npaug hauv qhov chaw, uas yog ua tiav los ntawm kev hloov pauv thiab ntws los ntawm kev ntxhov siab ntawm kev sib cais, nro (compression thiab expansion yog generated alternately), distortion, kua reorientation. , lwm.
2. Dispersion thiab sib tov, uas tuaj yeem ua rau cov khoom tawg mus rau hauv cov khoom los yog ua kom qhov loj ntawm ob lub ntsiab lus tsis sib haum mus txog qhov yuav tsum tau muaj, feem ntau yog nyob ntawm qhov siab shear thiab txuas ntxiv kev ntxhov siab.
1.3. Threaded conveying keeb
1. Kev sawv cev: piv txwv li, "56/56" conveying block, yav tas los "56" guiding range yog 56mm, thiab tom kawg "56" yog hais txog qhov ntev ntawm 56mm;
2. Cov hlau lead loj hais txog lub suab ntawm 1.5D ~ 2D;
3. Cov hlau lead me yog hais txog lub suab ntawm 0.4D;
4. Nws daim ntawv thov kev cai lij choj: nrog rau kev nce ntawm cov hlau lead, cov ntsia hlau extrusion tus nqi nce, cov khoom siv nyob hauv lub sij hawm txo, thiab cov nyhuv sib tov txo;
5. Nws yog qhov zoo los ua kom cov zis ntau ntxiv nyob rau hauv rooj plaub ntawm cov hlau lead loj thiab nyob rau hauv cov ntaub ntawv ntawm conveying; Thermo-rhiab heev polymer, txo lub sij hawm nyob thiab txo degradation; Qhov chaw tso pa tawm yog xaiv (qhov tob tob kuj raug xaiv) txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm
6. Cov ntsia hlau nruab nrab yog xaiv, thiab qhov sib xyaw yog qhov tseem ceeb, thiab kev sib xyaw ua haujlwm sib txawv yog maj mam txo qis, uas yog siv rau kev xa khoom thiab kev siv zog;
7. Xaiv lub sijhawm uas siv cov xov hlau me me, uas feem ntau maj mam txo hauv kev sib xyaw ua ke, thiab siv rau kev sib txuas thiab homogenizing metering seem kom txhawb siab thiab txhim kho cov yaj; Txhim kho kev sib xyaw degree thiab extrusion stability.
2, Cov khoom sib xyaw
Muaj ob pawg tseem ceeb, "K" series (kneading) thiab "M" series (toothed)
2.1. "K" series
Piv txwv li, K45 degree / 5/56 (KB45/5/56) belongs rau shear block, nrog "K" yog hais txog cov hlais shear block, "45 degree" yog hais txog lub kaum sab xis ntawm cov khoom sib dhos, "5" hais txog tag nrho ntawm 5 daim, "56" yog hais txog qhov ntev ntawm 56MM, thiab qhov dav ntawm cov ntsia hlau ntug yog 56 / 5=11.2mm),
Nws parameters:
Kev taw qhia, suav nrog rau pem hauv ntej thiab rov qab. Kev sib hloov rov qab (sab laug tig) yuav cuam tshuam cov khoom xa tuaj, ua kom lub sijhawm ntev, ua kom lub siab filling thiab ua kom zoo dua qhov sib xyaw.
Lub kaum sab xis, feem ntau muab faib ua "30 degree, 45 degree, 60 degree thiab 90 degree", nws muaj nuj nqi thiab cov nyhuv:
Nyob rau hauv cov kev taw qhia pem hauv ntej, nce lub stagger lub kaum sab xis yuav txo tau lub conveying muaj peev xwm, ncua lub sij hawm nyob rau hauv, thiab txhim kho lub mixing nyhuv, tab sis qhov ntau dua qhov to. Rau kev sib xyaw sib xyaw thiab kev sib xyaw ua ke, kev sib xyaw ua ke yog qhov zoo dua nrog lub kaum sab xis loj, thiab kev sib cais sib cais yog nyob ntawm 45 degree. Lub sijhawm zoo, ua raws li 30 degree ., qhov phem tshaj yog 60 degree .
Nyob rau hauv qhov kev taw qhia rov qab, nce lub kaum sab xis yuav txo tau qhov kev txwv tsis pub muaj txiaj ntsig ntawm cov khoom siv polymer, tab sis qhov ntau dua nws yuav xau.
Qhov dav ntawm cov ntsia hlau ntug feem ntau yog 7mm, 11mm, 11.2mm, 14mm, 19mm, thiab lwm yam. Qhov dav dua, qhov ntau dua qhov shear, qhov sib xyaw me me; Qhov dav me me, qhov txiav me me, qhov sib xyaw ntau dua. Rau kev sib xyaw sib xyaw thiab kev sib xyaw ua ke, qhov ua tau zoo ntawm kev sib xyaw ua ke txo qis nrog qhov nce ntawm qhov dav, thaum lub sij hawm ntawm kev sib xyaw ua ke nce nrog qhov nce ntawm qhov dav; Qhov dav me me, qhov ntau dua qhov sib piv ntawm axial zoo txaus thiab cov radial zoo txaus ntawm cov khoom.
Tus naj npawb ntawm lub taub hau feem ntau muab faib ua ib lub taub hau, ob lub taub hau thiab peb lub taub hau.
Nws cov nyhuv:
Nyob rau hauv cov kev taw qhia pem hauv ntej, qhov me me ntawm lub taub hau, ntau dua qhov extrusion conveying muaj peev xwm, ntau dua lub torque, thiab qhov zoo ntawm cov yam ntxwv sib tov, tab sis qhov tsawg dua cov nyhuv shear.
Nyob rau hauv qhov kev taw qhia rov qab, qhov me me ntawm cov taub hau, qhov me me ntawm extrusion conveying muaj peev xwm thiab qhov zoo ntawm cov yam ntxwv sib xyaw.
Ob lub taub hau xov tuaj yeem raug extruded feem ntau, nrog cov cua sov tsis sib xws thiab ntev ntev, thiab kev ua haujlwm zoo ntawm tus kheej (feem ntau siv).
Peb lub taub hau xov tuaj yeem hloov kho qhov siab thiab qhov kub thiab txias ntawm cov khoom siv ntawm lub kaum ntse ntse, nrog cov fiber ntau ruaj khov, zoo tso tawm qhov rov ua dua tshiab, tab sis cov zis tsawg.
2.2. "M" series
Cov hniav sib xyaw ua ke feem ntau yog siv los ua kom cov khoom ntws thiab ua kom cov ntaub ntawv homogenization. Cov hniav ntau dua, qhov sib tov muaj zog dua. Txawm li cas los xij, xyuam xim rau qhov kev puas tsuaj ntawm cov shear siab thaum siv. Muaj feem ntau ZME, TME thiab SME.
TME, uas yog nrov npe hu ua tus hniav txoj kab uas hla disc keeb, yog qhov ntxov tshaj plaws hniav zoo sib xyaw cov khoom thiab tsis muaj qhov zoo thiab tsis zoo conveying muaj peev xwm. Txawm li cas los xij, cov khoom sib txawv ntawm cov khoom sib txawv tuaj yeem tsim los ntawm cov ces kaum sib txawv ntawm cov hniav zoo nkauj, zoo, tsis zoo thiab ncaj. Raws li cov phau ntawv txawv teb chaws, TME lub ntsiab lus muab thaj chaw tshwj xeeb tshaj plaws rau cov khoom sib txawv. TME caij muaj peev xwm sib xyaw ua ke zoo heev, uas yog tib yam li ZME caij, tab sis tsis muaj kev tu tus kheej;
ZME element yog qhov hloov kho ntawm TME keeb. Nws muaj ib tug tej yam rov qab conveying muaj peev xwm, tab sis nws yog heev tsis muaj zog. Nws txoj haujlwm yog qhov pib zoo ib yam li cov khoom ntawm TME, tab sis nws muaj kev tu tus kheej. Qhov tsis zoo yog tias nws nyuaj rau nruab.
Lub ntsiab lus SME yog qhov ua tau zoo ntawm cov khoom xa tawm nrog rau qhov xau ntawm cov ntsia hlau ntug, uas muaj lub peev xwm thauj khoom zoo, thiab muaj qhov zoo ntawm axial tis thiab sib xyaw muaj peev xwm.
Feem ntau, thermoplastic vulcanized roj hmab thiab nplaim taws-retardant thermoplastic elastomer muaj qhov xav tau siab heev rau kev sib dhos ntsia hlau. Rau cov thermoplastic vulcanized roj hmab TPV ntsia hlau sib dhos, EPDM yuav tsum tau ua kom zoo, sib cais thiab faib cov ntsia hlau cov khoom thaum lub sij hawm vulcanization. Yog tias cov khoom siv ntsia hlau tsis raug teeb tsa kom raug, TPV nto yuav ntxhib thiab txawm tias muaj cov khoom. Cov nplaim hluav taws kub-retardant thermoplastic elastomer yog qhov nyuaj heev rau kev tawg vim qhov yuav tsum tau ntxiv cov nplaim hluav taws ntau, tshwj xeeb tshaj yog cov mesh loj heev. Yog hais tias lub shear muaj zog heev, cov nplaim hluav taws yuav decompose, yog li nws xav tau kev paub txaus los ua kom cov ntsia hlau sib dhos ua ke raws li cov nplaim hluav taws xob sib txuas.