1. Kev tsim nyog rau cov txheej txheem tsim khoom ntawm PVC (RPVC).
Qhov zoo thiab tsim nyog: Rigid PVC formulations feem ntau muaj ntau ntawm cov fillers (xws li calcium carbonate) thiab kev pab ua. Lub qhov dej zoo- khaws cia siv siab- sib tov ceev, tshwj xeeb tshaj yog ib lub thoob tob thiab paddles tsim nyob rau hauv ib tug kiv cua los yog turbine style, tuaj yeem tsim kom muaj cua sov txaus. Yog hais tias lub cev muaj zog ntawm cov cuab yeej siv tau siab txaus (xws li, lub zog siab hauv ib chav tsev ntim), nws tuaj yeem ua tau raws li cov txheej txheem "kub sib xyaw" uas yuav tsum tau ua kom nruj, ua kom cov khoom kub nce mus rau kwv yees li 110-120℃ua ntej mus rau qhov sib tov txias.
Cov teeb meem muaj peev xwm: Kev saib xyuas yuav tsum tau them rau qhov hnav khaub ncaws sab hauv phab ntsa ntawm lub nkoj sib xyaw. Txij li thaum cov fillers nyob rau hauv nruj formulations yog abrasive, hnyav hnyav nyob rau hauv lub puab phab ntsa ntawm cov khoom siv siv - ua rau muaj zog deg roughness - yuav tsis tsuas cuam tshuam rau tag nrho cov paug tawm tab sis kuj yuav ua rau overheating nyob rau hauv lub zos los yog tsis sib xws xim. Tsis tas li ntawd, hnav ntawm lub foob foob tuaj yeem ua rau cov hmoov to, uas cuam tshuam rau cov khoom zoo hauv cov khoom siv PVC nruj.
2. Haum rau cov txheej txheem tsim khoom ntawm mos PVC (SPVC)
Qhov zoo thiab tsim nyog: Thaum tsim cov PVC mos, qhov sib tov kub feem ntau yog qis dua rau PVC tawv (feem ntau nyob ib ncig ntawm 100℃-110 degree), nrog rau lub hom phiaj tseem ceeb yog los xyuas kom meej tias cov kua plasticizer yog absorbed rau hauv PVC resin pellets. Cov khoom siv sib xyaw uas muaj qhov sib txawv ntawm kev tswj ceev yog qhov tshwj xeeb zoo - haum rau cov txheej txheem no. Thaum lub sij hawm plasticizer ntxiv theem, qis- sib tov ceev feem ntau yuav tsum tau tiv thaiv clumping, thiab qhov ceev yog nce mus rau siab tom qab lub plasticizer tau absorbed los pab kom dispersion. Yog tias cov hniav ntawm cov cuab yeej siv tau tsim los muab cov khoom siv tau zoo (piv txwv li, cov khoom siv kev ua haujlwm siab), qhov no tuaj yeem ua kom cov yas nqus tau zoo thiab tiv thaiv kev tsim ntawm "ntub slurry"- zoo li cov khoom siv.
Cov teeb meem muaj peev xwm: Yog tias cov cuab yeej siv tau siv yav dhau los rau kev tsim cov PVC nyuaj rau lub sijhawm ntev, tej zaum yuav muaj cov khoom seem hauv lub nkoj. Thaum hloov mus rau cov khoom muag PVC, cov khoom seem no yuav flake tawm thiab sib tov rau hauv cov khoom tiav, ua rau specks lossis impurities. Yog li ntawd, kev tu kom huv ua ntej kev hloov pauv ntau lawm yog qhov tseem ceeb heev. Tsis tas li ntawd, cov khoom muag muag PVC qee zaum tsim cov pa taws vim cov yas evaporation; Nws yog ib qho tsim nyog los xyuas seb lub qhov tso pa tawm ntawm cov cuab yeej siv tsis muaj kev cuam tshuam thiab seb cov ntsaws ruaj ruaj puas yog roj- tiv taus.
3. Haum rau PVC cable compounds thiab siab - muab cov formulations
Qhov zoo thiab tsim nyog: Hom txheej txheem no yuav tsum muaj qib siab ntawm qhov kawg ntawm homogeneity hauv qhov sib tov. Nyob rau hauv lub qhov dej -tsim siv siab- sib tov ceev, qhov kev tshem tawm ntawm cov hniav thiab hauv qab ntawm lub nkoj yog feem ntau khaws cia nyob ib ncig ntawm 3-5 mm. Yog tias qhov kev tshem tawm no raug tswj xyuas kom raug, nws tsim qhov "dov" cov nyhuv uas ua kom cov kua plasticizers thiab cov hmoov stabilizers npog cov resin. Tsis tas li ntawd, yog tias cov khoom siv yog "kub / txias mixing unit" (xws li, nruab nrog lub tshuab txias txias), nws yog qhov ua tau zoo rau kev sib xyaw ua ke, vim tias cov khoom siv tom qab kub sib tov yuav tsum tau ua kom txias sai kom tsis txhob muaj kev sib cais ntawm plasticizer thiab caking; lub tshuab txias txias plays lub luag haujlwm tseem ceeb stabilizing.
Cov teeb meem muaj peev xwm: Siab- cov ntawv sau (xws li cov uas muaj cov nplaim hluav taws kub lossis cov khoom ua kom ntau) tso cov kev xav tau siab ntawm cov khoom sib tov lub zog. Lub hnub nyoog lub cev muaj zog thiab siv lub tshuab siv ntawm cov cuab yeej siv yuav plam lossis dhau ntawm cov khoom hnyav, yog li yuav tsum tau them nyiaj rau kev saib xyuas ntawm lub tshuab tsav.
4. Compatibility nrog PVC masterbatches los yog hloov cov tebchaw
Qhov Zoo thiab Kev Tsim Nyog: Cov txheej txheem no feem ntau yuav tsum muaj lub zog shear siab heev los cuam tshuam cov xim agglomerates lossis hloov pauv. Yog tias siv cov khoom sib tov muaj peev xwm ua haujlwm siab -kev ua haujlwm ceev (piv txwv li, linear ceev ntawm 25 m / s lossis siab dua) thiab muaj cov ntse ntse -edged (tsis hnav ntau dhau), nws yuav zoo - haum rau cov txheej txheem no nrog nws cov kev xav tau siab dispersion.
Cov teeb meem muaj peev xwm: Kev sib ntxiv ntawm cov hloov pauv (xws li CPE lossis ACR) tuaj yeem ua rau cov khoom khov. Yog hais tias qhov paug tawm ntawm cov khoom siv tsis loj txaus lossis lub kaum sab xis tawm tsis txaus, qhov no yuav ua rau muaj teeb meem paug tawm thiab ua rau lub voj voog ntev.
5. Kev txiav txim siab rau cov ntsiab lus tseem ceeb: Cov txheej txheem cua sov thiab cua txias
Kev sib txhuam cua sov thiab hluav taws xob cua sov: Hauv cov txheej txheem niaj hnub no, cov khoom siv PVC nruj feem ntau tso siab rau kev sib txhuam cua sov kom nce cov khoom kub. Yog tias cov cuab yeej siv thib ob tau nruab nrog lub zog hluav taws xob ntau dhau, nws yuav ua rau cov khoom tawg vim qhov chaw overheating. Hloov pauv, yog tias cov cuab yeej rwb thaiv tsev raug puas tsuaj loj heev, nws yuav tsis tuaj yeem ncav cuag tus txheej txheem kub los ntawm kev sib txhuam cua sov ib leeg thaum tsim khoom hauv huab cua txias.
Cov Cuab Yeej Cuab Yeej Cuab Yeej: Rau cov txheej txheem uas yuav tsum tau tswj qhov kub thiab txias (xws li cov khoom siv PVC pob tshab), yog tias lub tsho lossis cov khoom siv cua txias ntawm cov khoom siv tau raug scaled loj los yog txhaws, qhov ua kom txias yuav txo qis, ua rau tsis muaj kev tswj xyuas kub. Nws yog ib qho tseem ceeb los xyuas qhov ua tau zoo ntawm cov cua txias ua ntej yuav khoom.