Cov hauv qab no yog cov hauv paus ntsiab lus tseem ceeb uas yuav tsum nco ntsoov txog extrusion.Lawv yuav tsum pab txuag nyiaj, ua kom cov khoom zoo dua qub, thiab siv cov cuab yeej siv tau zoo dua.
1. Lub hauv paus ntsiab lus ntawm kev siv tshuab.Qhov yooj yim mechanics ntawm extrusion yog ib qho yooj yim - ib tug ntsia hlau tig rau hauv ib lub thoob thiab thawb cov yas rau pem hauv ntej.Ib tug ntsia hlau yog tiag tiag ib tug inclined dav hlau, los yog ramp, mob nyob ib ncig ntawm lub hauv paus core.Lub hom phiaj yog los muab ntau lub zog kom muaj kev tiv thaiv zoo heev.Nyob rau hauv cov ntaub ntawv ntawm ib tug extruder, muaj peb tsis kam mus kov yeej: lub rubbing ntawm cov khoom hais (cov khoom noj) tawm tsam lub chim phab ntsa thiab ib leeg nyob rau hauv thawj ob peb lem ntawm cov ntsia hlau (qhov chaw pub);adhesion ntawm yaj mus rau lub chim phab ntsa;thiab tsis kam ntws hauv cov yaj thaum nws raug thawb rau pem hauv ntej.
Sir Isaac Newton piav qhia-ed hais tias yog ib yam dab tsi tsis txav mus rau hauv ib qho kev taw qhia, lub zog ntawm nws yog sib npaug ntawm qhov kev taw qhia.Cov ntsia hlau tsis txav mus rau hauv qhov kev taw qhia axial, txawm hais tias nws tuaj yeem tig nrawm nrawm ntawm qhov kev taw qhia hla ib puag ncig.Yog li, lub zog axial ntawm cov ntsia hlau yog sib npaug, thiab yog tias nws thawb mus rau pem hauv ntej nrog lub zog loj ntawm cov yas yaj nws yuav tsum tau thawb rov qab rau ib yam dab tsi uas sib npaug.Nyob rau hauv rooj plaub no, nws yog thawb rau ntawm ib tug bearing qab lub feed nkag hu ua thrust bearing.
Feem ntau ib leeg ntsia hlau yog txoj cai xov, zoo li cov ntsia hlau thiab bolts siv hauv cov ntoo thiab tshuab.Lawv tig counter-clockwise, yog saib los ntawm qab, raws li lawv sim ntsia lawv tus kheej rov qab lub chim.Hauv qee qhov ntxaib-ntsia hlau extruders, ob lub hau ntswj tig mus rau qhov sib txawv ntawm ob lub thoob thiab intermesh, yog li ntawd ib qho yuav tsum yog sab xis thiab sab laug.Nyob rau hauv lwm yam intermeshing ntxaib-screws, ob lub screws tig nyob rau hauv tib txoj kev thiab yog li ntawd yuav tsum muaj tib lub orientation.Nyob rau hauv txhua rooj plaub, txawm li cas los xij, muaj cov kabmob thrust coj lub zog rov qab, thiab Newton txoj cai tseem siv tau.
2. Lub hauv paus ntsiab lus thermal.Extrudable plastics yog cov thermoplastics-lawv yaj thaum rhuab thiab rov ua dua thaum txias.Lub tshav kub kom yaj cov yas tuaj qhov twg?Pub preheating thiab chim / tuag tso cua sov tuaj yeem pab txhawb, thiab tseem ceeb heev thaum pib, tab sis lub zog hluav taws xob tawm tswv yim - kev sib txhuam cov cua sov hauv lub thoob vim lub cev muaj zog tig cov ntsia hlau tawm tsam qhov tsis kam ntawm cov kua nplaum - yog qhov tseem ceeb tshaj plaws ntawm cov cua sov. rau tag nrho tsuas yog cov tshuab me me, qeeb-tsav screws, siab-melt-temperature plastics, thiab extrusion-coating daim ntaub ntawv.
Rau tag nrho lwm yam kev khiav hauj lwm, nws yog ib qho tseem ceeb kom paub hais tias lub chim boilers tsis yog lub hauv paus ntawm cov cua sov thaum lub sij hawm ua hauj lwm, thiab yog li ntawd muaj tsawg zog extrusion tshaj peb xav.Qhov ntsuas kub hauv qab yuav tseem ceeb heev vim tias nws cuam tshuam tom qab, lossis tus nqi ntawm cov khoom xa tawm hauv cov khoom noj.Lub taub hau thiab tuag kub yuav tsum nyob ntawm lossis ze ntawm qhov xav tau ntawm qhov kub thiab txias, tshwj tsis yog tias lawv siv rau lub hom phiaj tshwj xeeb xws li gloss, ntws faib, lossis tswj siab.
3. Lub hauv paus ntsiab lus ceev txo.Nyob rau hauv feem ntau extruders, ntsia hlau ceev yog hloov los ntawm kev hloov lub cev muaj zog ceev.Cov motors feem ntau tig ntawm ib ncig ntawm 1750 rpm ntawm qhov nrawm, tab sis qhov no nrawm heev rau cov ntsia hlau extruder.Yog tias nws tau tig ceev ceev, nws yuav tsim kom muaj kev sib txhuam ntau dhau, thiab lub sijhawm nyob ntawm cov yas yuav luv dhau los npaj cov khaub ncaws zoo, sib xyaw kom zoo.Ib qho piv txwv txo qis ntawm 10: 1 thiab 20: 1.Thawj theem yuav siv lub zog los yog lub teeb rub, tab sis theem ob ib txwm siv lub zog thiab cov ntsia hlau tau teeb tsa nyob rau hauv nruab nrab ntawm qhov kawg, cov iav loj.
Hauv ob peb lub tshuab qeeb qeeb (xws li cov menyuam ntxaib rau UPVC), tej zaum yuav muaj peb theem ntawm kev txo qis, thiab qhov ceev tshaj plaws yuav qis li 30 rpm lossis tsawg dua (nrog rau qhov sib piv txog 60: 1).Ntawm qhov tsis sib xws, qee tus menyuam ntxaib ntev ntev siv rau kev sib xyaw ua ke yuav khiav ntawm 600 rpm lossis ntau dua, yog li xav tau qhov kev txo qis qis heev, nrog rau ntau qhov txias txias.
Qee lub sij hawm qhov kev txo qis tsis sib haum rau txoj haujlwm - muaj lub zog yuav tsis siv - thiab nws muaj peev xwm ntxiv ib txheej ntawm rubeys ntawm lub cev muaj zog thiab thawj theem txo kom hloov qhov siab tshaj plaws.Qhov no yog ua kom ceev ceev tshaj qhov txwv ua ntej los yog txo qhov siab tshaj plaws kom cia lub kaw lus khiav ntawm feem pua ntawm qhov siab tshaj plaws.Qhov no ua rau muaj zog muaj zog, txo cov amperage, thiab zam teeb meem lub cev muaj zog.Nyob rau hauv ob qho tib si, cov zis tuaj yeem nce ntxiv, nyob ntawm cov khoom siv thiab nws cov kev xav tau cua txias.
Post lub sij hawm: May-04-2017