Kev tshuaj xyuas ntawm cov teeb meem tshwm sim hauv commissioning ntawm PVC profile extrusion tuag

1, Pwm plugging
Thaum tawm ntawm qhov tuag, yog hais tias qhov nruab nrab ceev ntawm txhua feem ntawm lub parison yog sib npaug, thiab yog hais tias lub hwj chim ntawm cov neeg tuag tsis tau txiav txim siab, tus sib npaug extruded parison kuj yuav cuam tshuam los ntawm peb yam:
(1) Melt ex-pwm expansion;
(2) Parison kos duab shrinkage;
(3) Parison txias shrinkage.
Thaum lub rub nrawm ntawm lub parison ntawm qhov tawm ntawm qhov tuag yog tsawg tshaj li qhov extrusion ceev ntawm parison nyob rau hauv qhov kev txiav txim ntawm lub tshuab kos, tuag thaiv yuav tshwm sim.
Lub ntsiab yog vim li cas rau pwm plugging yog raws li nram no:
1. Lub tsheb laij teb plam thiab lub zog traction tsawg dhau. (Tshwj xeeb cov dej ntawm qhov profile nto thiab kho qhov zoo siab ntawm cov lem sab sauv thiab sab qis) 2 Qhov ceev ntawm lub tsheb laij teb tsis ruaj khov, ceev thiab qeeb. (Kos lub tsheb laij teb) 3 Cov khoom siv yas dhau lawm, thiab lub parison tsis tuaj yeem txhawb nqa lub zog traction (txo lub chim kub) 4 Qhov kub tsis muaj kev tswj, thiab cov paug tawm ntawm ib sab yog ceev heev. (Kos thermocouple) 5 Lub tshuab nqus tsev ntawm cov molding tuag los yog dej tank loj dhau, thiab qhov tsis kam ntawm qhov profile yog loj. (Kho lub tshuab nqus tsev) 6 Lub roj nplua nyeem hauv cov mis yog ntau dhau, lub fluidity muaj zog heev, thiab extrusion ceev tsis ruaj khov. (Hloov qhov feem ntawm cov roj nplua nyeem) 7 Cov nqes nqes noj ntawm lub puab tsaig noj ntawm qhov loj me me lossis luv dhau. (Ntev txoj kab nqes noj *) 8 Qhov tso tawm ntawm lub qhov ncauj claw yog nrawm heev ( tshuab cua txias lossis nres los kho qhov tso tawm *) 9 Qhov sib txawv ntawm lub puab tsaig ntawm qhov chaw tuag yog loj nyob rau hauv pem hauv ntej thiab me me nyob rau hauv rov qab (xyuas seb qhov chaw nyob. qhov system ntawm qhov chaw tuag thiab cov phaj molding tsis raug ntsia)
2, Kev vibration
Yog hais tias qhov kev tiv thaiv ntawm qhov profile thaum lub sij hawm traction loj heev, kev co yuav tshwm sim (Sanjia hu ua "tshaj"). Thaum lub sij hawm tsim cov profile, yog tias qhov kev vibration yuav tsum tsim kev co kab perpendicular mus rau traction kev taw qhia ntawm qhov profile nto, nws yuav cuam tshuam rau qhov zoo ntawm qhov profile, thiab nws yuav hnav cov pwm sai, cuam tshuam rau lub neej ntawm pwm. Muaj ob lub laj thawj tseem ceeb rau kev tawm tsam. Ib qho yog tias lub tshuab nqus tsev muaj zog heev thaum lub sijhawm tsim khoom. Ntawm qhov tod tes, pwm loj yog tsis tsim nyog. Thaum kho cov pwm, ua ntej xyuas kom meej tias cov pwm loj yog kho nyob rau hauv qhov chaw ntawm lub tshuab nqus tsev tsim nyog, uas yog hais txog qhov tsawg kawg nkaus lub tshuab nqus tsev nyob rau hauv lub premise ntawm kom ntseeg tau lub zuag qhia tag nrho dimension thiab flatness ntawm lub profile. Thaum tshem tawm cov kev tawm tsam, qhov tseem ceeb yuav tsum tau muab rau kev kho qhov zoo li qhov thaiv, thiab kev saib xyuas yuav tsum tau them nyiaj kom ntseeg tau tias qhov loj ntawm cov duab tswj qhov taw tes. Hauv daim duab 1, plaub lub ntsiab lus A yog cov ntsiab lus tswj ntawm tag nrho qhov ntev ntawm cov khoom. Yog tias tag nrho qhov ntev ntawm qhov profile twb nyob zero lossis tsis zoo, ces taw tes A tsis tuaj yeem kho los ntawm kev tshem cov khoom. Ua tib zoo saib xyuas qhov loj me ntawm cov hlaws tom qab sib dhos rau qhov loj ntawm taw tes B. Yog tias taw tes B muab ntau dhau, lub claw sab saud ntawm cov hlaws zawj yuav tawm hauv qab lub siab tsis zoo, ua rau cov hlaws tig tawm thiab haum loj. yog loj.
Yog tias qhov kev tiv thaiv tsis tuaj yeem raug tshem tawm tag nrho los ntawm kev kho qhov chaw thaiv, ces xav txog kev kho qhov chaw tuag. Txij li thaum tag nrho cov profile tsis tuaj yeem dhau los ntawm qhov chaw tuag, koj tuaj yeem siv cov saw saw los pom ib feem ntawm qhov profile kom hnov ​​​​qhov kev tawm tsam los ntawm qhov chaw tuag. Kev vibration yog qee zaum tshwm sim los ntawm kev kho tsis raug ntawm lwm cov teeb meem, tshwj xeeb tshaj yog tom qab fusion vuam ntawm lub puab tsaig, qhov sib thooj yuav tsum tau ceev faj kom ua txoj hauv kev.
Sim tsis txhob siv cov txheej txheem tsis zoo xws li tso cov roj rau ntawm qhov nkag ntawm lub molding tuag los yog ntxiv xab npum hauv lub tank dej kom tshem tawm qhov kev co, txwv tsis pub cov dej txias yuav ua rau muaj kuab paug thiab lub qhov dej me me yuav yooj yim thaiv los ntawm nplai.
3, Pant
Thaum lub sij hawm cov txheej txheem ntau lawm, qhov nruab nrab billet tsis tuaj yeem nkag mus rau molding tuag stably, qee zaum nws tiv nrog molding tuag, qee zaum nws raug cais, uas zoo li tus neeg ua pa luv heev tom qab kev tawm dag zog hnyav. Qhov tshwm sim no hu ua panting. Qhov feem ntau intuitive manifestation ntawm gasping yog hais tias lub nqus tsev vacuum gauge thawj pwm twb tsis tu ncua viav vias. Piv nrog rau lwm yam teeb meem ntawm profiles, qhov tshwm sim ntawm gasping yog qhov nyuaj rau kho. Cov ua rau panting tuaj yeem txiav txim siab los ntawm cov hauv qab no:
1. Kev tiv thaiv. Thaum gasping, qhov ruaj khov yuav tsis loj heev. Yog tias nws loj heev, nws yuav vibrate. Vim tias qhov kev tawm tsam tsis pom tseeb, nws tsis yooj yim nrhiav. qhov no
Qhov kev tawm tsam tuaj yeem pom los ntawm txoj kev ntawm ib feem ntawm kev tsim. Piv txwv li, cov phab ntsa dai ntawm lub tiaj tus ncej yog tag nrho tsim ua ntej, thiab lub sijhawm suav. Raws li qhov traction ceev, qhov teeb meem pib tom qab muaj pes tsawg lub blocks. Tom qab ntawd sim txhua lub puab tsaig nyias nyias.
2. Lub tshuab nqus tsev. Lub tshuab nqus tsev yuav tsum tsis ruaj khov thaum gasping. Lub sijhawm no, nws yog ib qho tsim nyog yuav tsum tshem tawm qhov muaj peev xwm ntawm cov dej ntws ntawm txhua ntu ntawm qhov chaw pwm thiab nruab nrab ntawm qhov chaw pwm thiab lub tank dej.
Qhov chaw ntawm cov roj yog kaw. Yog tias lub tshuab nqus tsev loj dhau tom qab sealing, nws yuav ua rau muaj kev tiv thaiv loj. Qhib ob peb lub tshuab nqus tsev vacuum ntawm lub tshuab cuab tam kom tso pa tawm.
3. Lub parison yog tshaj cov yas, thiab lub zog traction tsis tuaj yeem hloov tau zoo thaum lub sij hawm parison shaping. Thaum lub sij hawm no, lub chim kub yuav tsum tau txo kom zoo.
4. Cov paug tawm ntawm lub puab tsaig lub qhov ncauj qeeb dhau, thiab cov molding tuag tsis puv, ua rau cov pa tawm.
4, Profile loj tawm ntawm kam rau ua
1. Tag nrho qhov ntev
Yog hais tias tag nrho qhov ntev tsis kam rau siab, ua ntej txiav txim siab seb qhov luaj li cas ntawm cov duab tswj taw tes yog qhov tseeb. Thaum lub profile nyob rau hauv qhov zoo sib txawv, lub rear qhov chaw thaiv tau ncaj qha tsiv tawm ntawm txoj hauj lwm. Thaum qhov profile nyob rau hauv qhov tsis zoo sib txawv, qhov loj ntawm cov duab tswj taw tes ntawm qhov chaw tuag yuav tsum tau nce ntxiv thaum qhov sib txawv ntawm qhov profile thiab qhov nominal loj. Thaum qhov sib txawv me me, qhov loj ntawm cov duab tswj qhov taw tes ntawm cov duab thaiv nyob rau hauv pem hauv ntej ntawm lub tank dej tuaj yeem kho ncaj qha. Lub sijhawm no, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau txoj haujlwm ntawm qhov sib thooj. Txwv tsis pub, co thiab panting yuav tshwm sim.
Yog tias qhov luaj li cas ntawm cov duab tswj qhov taw tes yog qhov tseeb, qhov loj ntawm lub puab tsaig yuav tsum yog me me. Lub sijhawm no, cov khoom noj tuaj yeem nce ntxiv kom lub puab tsaig puv kom ua kom tag nrho qhov ntev ua tau raws li qhov yuav tsum tau ua siab ntev.
Yog hais tias tag nrho sab sauv thiab qis qhov ntev ntawm qhov profile me dhau, ua tib zoo saib seb nws yog tshwm sim los ntawm kev siv lub tsheb laij teb ntau dhau.
2. Phab ntsa thickness dimension
Nws yog nruj me ntsis txwv tsis pub kho qhov loj ntawm qhov tuag thaum kho cov phab ntsa tuab
3. Muaj nuj nqi bayonet loj
Yog hais tias qhov luaj li cas ntawm cov roj hmab strip lub qhov ncauj los yog cov hlaws lub qhov ncauj loj heev, ua ntej yuav tsum xyuam xim rau seb tus qauv tswj point A puas yog. Yog tias cov duab zoo, taw tes A tuaj yeem kho. Yog tias cov duab nyob ntawm xoom lossis tsis zoo, taw tes B yuav tsum tau kho.
Yog hais tias qhov luaj li cas ntawm cov roj hmab strip lub qhov ncauj los yog lub qhov ncauj hlaws me me dhau, ua ntej ua tib zoo saib seb qhov kev tswj qhov taw tes A puas yog. Yog tias cov duab tsis zoo, taw tes A tuaj yeem kho. Yog tias cov duab nyob ntawm xoom lossis zoo, taw tes B yuav tsum tau kho.
Yog tias tsim nyog los kho qhov loj ntawm cov duab tswj qhov taw tes A, kho los ntawm lub nraub qaum molding thaiv thaum tshem cov khoom, thiab kho qhov vuam los ntawm qhov pib ntawm lub molding thaiv thaum ntxiv cov khoom.
Yog tias qhov loj me dhau lawm, kho vuam ntawm qhov point A yuav tsum tau ua rau sab nraud.
Cov phiaj xwm kho saum toj no yog ua raws li lub hauv paus ntsiab lus uas lub puab tsaig tawm ntawm lub puab tsaig zoo ib yam nrog lossis qeeb qeeb me ntsis ntawm qhov loj.
4. haum loj
Tom qab lub ntsiab profile yog haum nrog cov hlaws dai, haum qhov ntev A feem ntau loj heev. Lub sijhawm no, nws yog ib qho tsim nyog los txiav txim siab seb puas yuav kho cov hlaws dai lossis cov khoom tseem ceeb raws li qhov tseeb ntawm cov khoom tsim. Yog tias lub siab bar tau kho, qhov loj ntawm B ntawm lub siab bar tuaj yeem raug txo kom lub siab bar "buckle hauv" los daws qhov teeb meem. Txo qhov loj ntawm B ntawm lub siab bar tuaj yeem kho qhov point C lossis point D. Thaum kho qhov point C, lub taub hau thiab qhov loj tuaj yeem ua "angled". Kev cuam tshuam los ntawm kev sib cais, taw tes C ntawm qhov loj me tsis yooj yim kho, thaum point D tuaj yeem ua tiav ncaj qha los ntawm lub tshuab milling, uas yooj yim heev. Yog tias cov khoom tseem ceeb raug kho, qhov loj ntawm B ntawm cov khoom tseem ceeb yuav tsum tau nce ntxiv. Qhov loj ntawm B tuaj yeem nce ntxiv los ntawm kev kho qhov vuam ntawm qhov zoo li qhov thaiv ntawm taw tes E lossis milling 0.1mm-0.2mm ntawm point F (thaum tag nrho qhov ntev ntawm qhov me me mus rau qhov tsis zoo lossis xoom, txoj kev milling F point yog nyiam los kho qhov haum)
5, Profile zoo li tsis kam lees
1. Profile dabtsi yog khoov
Lub hauv paus ua rau ntawm qhov profile dabtsi yog khoov yog tias muaj kev ntxhov siab nyob hauv qhov profile thaum lub sijhawm tsim khoom, thiab muaj ob lub laj thawj tseem ceeb rau kev tsim cov kev ntxhov siab seem. Ib qho yog tias qhov cua txias tsis synchronized, thiab lwm qhov yog tias qhov tsis kam ntawm txhua qhov ntawm qhov profile thaum lub sij hawm traction tsis sib haum. Khoov vim unsynchronized txias yog feem ntau tshwm sim los ntawm cov hauv qab no tej yam kev mob:
A. Lub taub hau tuag yog qhov tsis sib xws, thiab phab ntsa thickness sib txawv heev. Lub sijhawm no, yog tias qhov kev ua kom txias txias ntawm txhua qhov ntawm molding zoo ib yam, qhov profile yog yooj yim rau fim phab ntsa
Lub thicker sab yog khoov;
B. Cov cua kub ntawm lub taub hau tuag yog tsis muaj kev tswj, ua rau tsis sib xws;
C. Cov txheej txheem txias ntawm molding tuag yog qhov tsis tsim nyog, thiab qhov ua kom txias ntawm txhua qhov tsis sib xws, raws li qhia hauv daim duab
Yog tias qhov profile khoov mus rau N sab, lub qhov dej ntawm W sab tuaj yeem thaiv lossis lub tshuab nqus tsev ntawm N sab tuaj yeem nce ntxiv. (Lub qhov dej ntawm qhov thaiv zoo li ntawm W sab yog qhov zoo heev)
D. Traction ceev ceev heev. Vim tias qhov ua kom txias txias ntawm txhua qhov chaw ntawm qhov kawg txias txias tsis tuaj yeem zoo ib yam, nws tuaj yeem ua tiav thaum qhov nrawm nrawm.
Qhov sib txawv ntawm kev ua kom txias txias tsis ua lub luag haujlwm tseem ceeb hauv kev ua kom tau raws li qhov xav tau ntawm kev ua kom txias txias, tab sis thaum lub extrusion ceev ceev heev, sab nrog kev ua kom txias txias tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua kom txias txias, thiab qhov profile yuav khoov rau sab. nrog tsis zoo cua txias efficiency. Khoov vim tsis kam yog feem ntau tshwm sim los ntawm cov xwm txheej hauv qab no:
A. Qhov teeb tsa ncaj tsis raug
B. Tsis sib xws ceev ntawm lub tsheb laij teb sab sauv thiab qis
C. Kev ua haujlwm ntawm txhua qhov ntawm qhov profile yog qhov tsis sib xws, feem ntau yog vim qhov tsis sib xws ntawm qhov loj thiab lub puab tsaig tsis kam. Thaum kho qhov teeb meem dabtsi yog khoov ntawm qhov profile, qee zaum kuv xav tias tsis muaj kev pab, thiab qhov profile yog indifferent rau ntau txoj kev. Qhov no yog vim kev khoov yog qhov tshwm sim ntawm qhov txias thiab ua haujlwm. Piv txwv li, nws muaj peev xwm khoov lub laub-rub ncej mus rau sab laug thiab sab xis raws li qhia hauv daim duab. Cov xwm txheej paub yog tias qhov ua kom txias ntawm lub qhov ncauj qhov ncauj yog qhov zoo dua li ntawm cov lus qhia kev tsheb nqaj hlau (vim tias muaj ntau cov phab ntsa ntawm lub qhov ncauj claw, ob qho tib si yog ob sab txias). Yog hais tias qhov profile khoov mus rau sab qhia kev tsheb nqaj hlau, nws yog ib qho nyuaj los txiav txim seb nws yog tshwm sim los ntawm kev tiv thaiv los yog dabtsi yog khoov. Vim tias lub tshuab nqus tsev tau nce ntxiv kom ua rau qhov profile ze rau cov pwm ruaj khov, txawm hais tias qhov ua kom txias txias tau nce ntxiv, nws kuj ua rau muaj kev tiv thaiv ntawm cov lus qhia rail sab. Lub sijhawm no, lub qhov dej ntawm lub qhov ncauj ntawm lub qhov ncauj ntawm qhov loj me tuaj yeem raug kaw kom nruj kom txo qhov kev ua kom txias ntawm lub qhov ncauj ntawm lub qhov ncauj, thiab tom qab ntawd ces kaum ntawm qhov loj me ntawm cov lus qhia kev tsheb nqaj hlau tuaj yeem raug tshem tawm los txo qhov tsis kam.
Yog hais tias qhov profile yog khoov rau ntawm lub puab tsaig sab, nws txhais tau hais tias qhov kev tawm tsam ntawm lub puab tsaig sab yog ntau dua li ntawm cov lus qhia rail. Nyob rau lub sijhawm no, lub qhov dej ntawm qhov kev taw qhia kev tsheb ciav hlau sab ntawm lub sizing block tuaj yeem raug kaw kom nruj kom txo tau qhov kev ua kom txias ntawm cov kev taw qhia kev tsheb nqaj hlau, thiab tom qab ntawd txo qhov sizing thaiv tsis kam ntawm lub puab tsaig sab.
Sim tsis txhob siv cov txheej txheem ntawm kev kho qhov ncaj ntawm lub tank dej kom tshem tawm qhov khoov, vim tias qhov kev hloov kho yog qhov loj, pwm hnav sai, thiab qhov tsis kam yog qhov loj heev, uas muaj qee yam cuam tshuam rau lub cev ntawm qhov profile. . Tsis muaj teeb meem dab tsi ua rau kev khoov, qhov teeb meem dabtsi yog khoov tuaj yeem daws tau los ntawm kev ntxiv cov khoom ci kom tshem tawm cov kev ntxhov siab sab hauv. Tsis tas li ntawd, qhov chaw tuag thiab lub tank dej tuaj yeem sib cais kom deb li deb kom tso cai rau qhov profile kom txias txias rau lub sijhawm kom tshem tawm cov kev ntxhov siab sab hauv. Lub sijhawm no, qhov kev ncua deb yuav tsum tsis txhob ntev dhau, txwv tsis pub cov duab profile tsis tuaj yeem lav.
2. Lub kaum sab xis ntawm qhov profile
Tom qab tib qhov profile yog sawed rau hauv ob ntu, qhov sib txawv A raws li qhia hauv daim duab tshwm tom qab theem ntawm lub dav hlau kab rov tav, uas yog hu ua lub kaum sab xis ntawm qhov profile. Lub out-of-tolerance ntawm lub kaum sab xis dimension ntawm qhov profile yog tshwm sim los ntawm distortion ntawm qhov profile nws tus kheej. Muaj ob hom distortion: sab laug thiab txoj cai distortion thiab nce thiab nqis distortion.
Twist sab laug thiab sab xis, twist nce thiab nqis
Sab laug thiab txoj cai twisting yog yooj yim heev los kho, uas tuaj yeem daws tau los ntawm kev txhim kho eccentric tus yuam sij ntawm lub phaj molding ntawm lub molding tuag los yog ncaj qha kho vuam ntawm ib sab ntawm lub molding thaiv thiab ua rau sab nraud. Twist up thiab down (feem ntau lub phab ntsa overhanging yog warped). Lub sijhawm no, nws yog qhov teeb meem heev los kho cov phab ntsa overhanging ncaj qha. Qhov zoo li tus thaiv ntawm sab qis ntawm phab ntsa overhanging yuav tsum tau muab tshem tawm, thiab sab sauv yuav tsum tau welded thiab nias. Qhov tseeb, qhov no tuaj yeem daws tau los ntawm kev siv cov pwm kho txoj kev ua raws li sab laug thiab txoj cai twist.