MDI elastomer yog cov tub ntxhais ntawm polyurethane elastomer cov khoom tsim khoom, cov cuab yeej ua haujlwm siab, tso siab rau kev ntsuas qhov tseeb, cov khoom siv kub tsis tu ncua thiab kev kub siab casting los ua cov khoom tiav. MDIs muaj siab reactivity ntawm raw cov ntaub ntawv thiab yog nquag mus crystallization thiab solidification residues. Kev saib xyuas tsis zoo tuaj yeem yooj yim ua rau cov raj xa dej txhaws, ntsuas qhov yuam kev, ua npuas dej, cov khoom siv tsis sib xws, thiab lwm yam.. Cov teeb meem no cuam tshuam ncaj qha rau cov khoom zoo, ua kom lub cev twj tso kua mis thiab lub valve hnav, nce cov khoom siv tsis ua haujlwm thiab cov nqi poob qis. Kev tu thiab tu ncua sij hawm yog tus yuam sij kom ruaj khov ntawm cov khoom siv, ua kom lub neej ua haujlwm ntev thiab tswj cov khoom lag luam ruaj khov. Cov txheej txheem tu txheej txheem ntawm MDI casting tshuab tau qhia meej, thiab kev lag luam - qauv tu ncua sij hawm rau cov khoom tso tsheb hlau luam thiab cov kav dej tau teev tseg.
I. Kev Saib Xyuas Txhua Hnub (yuav tsum tau ua ntej thiab tom qab pib-nce)
Kev saib xyuas txhua hnub tsom mus rau kev tshuaj xyuas, tu thiab kev txheeb xyuas qhov ntsuas, uas yog lub hauv paus rau kev tiv thaiv luv luv - lub sijhawm ua tsis tiav. Ua ntej pib txhua hnub, cov neeg ua haujlwm yuav tsum kuaj xyuas cov khoom siv raw hauv lub tog raj kheej A thiab B kom tiv thaiv lub tshuab ziab khaub ncaws vim muaj cov khoom tsis txaus. Nyob rau tib lub sijhawm, lawv yuav tsum txheeb xyuas qhov ntsuas kub kom ntseeg tau tias cov tso tsheb hlau luam thiab cov kav xa khoom nyob rau hauv qhov kub thiab txias haum rau MDI cov ntaub ntawv, yog li tsis txhob muaj viscosity siab vim qhov kub thiab txias los yog degradation ntawm cov ntaub ntawv vim qhov kub thiab txias. Qhov thib ob, tus neeg teb xov tooj yuav tsum kuaj xyuas qhov ntsuas siab kom paub meej tias cov kev khiav thiab kev tawm dag zog yog qhov qub thiab cov ntsuas ntsuas thiab ntsuas ntsuas ntsuas qhov ntsuas tau raug nyeem. Thaum kawg ntawm kev tsim khoom, cov khoom seem ntawm lub taub hau thiab tso tawm nozzle ntawm qhov casting yuav tsum tau muab ntxuav, thiab cov plua plav thiab cov roj stains ntawm lub cev yuav tsum tau so kom huv si kom huv si. Nyob rau tib lub sijhawm, tshuaj xyuas cov dej xau los yog xoob cov kav dej sib txuas thiab cov li qub thiab, yog tias muaj, kho cov khoom nruj nruj kom raws sijhawm kom tsis txhob muaj cov khoom xau los yog huab cua / noo noo ingress thiab xyuas kom meej tias cov cuab yeej ua haujlwm zoo.
II. Kev Saib Xyuas Tshwj Xeeb Txhua Lub Limtiam (kev tshuaj xyuas cov khoom hnav thiab kev tu yooj yim)
Kev saib xyuas txhua lub lim tiam yog tsom rau kev pom cov tshuab, txav cov khoom thiab cov qauv sib khi, tshwj xeeb yog los daws cov teeb meem ntsig txog cov khoom tsis huv thiab cov khoom hnav. Ua ntej, lim cov ntxaij vab tshaus yuav tsum tau muab tshem tawm ntawm cov khoom siv A thiab B kom tshem tawm impurities thiab gel deposits; qhov no tiv thaiv cov ntxaij vab tshaus uas tuaj yeem ua rau cov zis tsis ruaj khov lossis ntsuas qhov tsis sib xws, thiab cov ntxaij lim dej puas yuav tsum tau hloov raws sijhawm. Qhov thib ob, txav cov khoom xws li lub cev twj tso kua mis, tsav bearings thiab zawv zawg phau ntawv qhia kev tsheb nqaj hlau yuav tsum raug tshuaj xyuas thiab cov roj tshwj xeeb siv los txo cov khoom siv. Nyob rau tib lub sijhawm, cov yeeb nkab foob thiab cov khoom sib txuas tau raug tshuaj xyuas kom zoo rau kev laus, deformation lossis microleakage. Vim lub siab permeability ntawm MDI raw cov ntaub ntawv, foob degradation tau yooj yim ua rau to tsis ua hauj lwm; yog li ntawd, yuav tsum muaj kev soj ntsuam xyuas thiab hloov pauv. Thaum kawg, calibrate cov ntaub ntawv siv dispensing tsis los xyuas kom meej tias cov cuab yeej sib xyaw qhov tseeb raws li tus qauv tsim.
III. Txhua hli Hauv -Txoj kev tu kom tob (Tswj lub hauv paus ntawm cov khoom siv tank thiab cov kav dej)
Cov khoom siv thiab cov kav xa dej xa mus yog qhov tseem ceeb ntawm MDI foundry txij nkawm thiab ua rau muaj qhov tsis zoo thiab yuav tsum tau muab ntxuav kom nruj raws li cov txheej txheem ntxuav. Nyob rau hauv ib txwm ua haujlwm tas mus li, cov khoom siv tso tsheb hlau luam, cov kav dej xa mus thiab cov kab khiav yuav tsum tau ua kom huv si ib hlis ib zaug. Rau kev tsim khoom sib cuam tshuam nrog lub voj voog pib nres txhua hnub, kev ntxuav yog pom zoo txhua 20 hnub. Yog tias lub tshuab tsis ua haujlwm ntev tshaj peb hnub, cov yeeb nkab yuav tsum tau ntxuav tshwj xeeb ua ntej nws tuaj yeem rov pib dua. Thaum lub sij hawm ntxuav, cov residue raug tshem tawm los ntawm lub thawv thiab rov siv dua los ntawm cov yeeb nkab nrog ib puag ncig tshwj xeeb hnyav kom tshem tawm cov khoom siv residues thiab cov khoom ua kom ruaj khov, yog li tiv thaiv kev tsim cov yeeb nkab uas tuaj yeem txhaws cov yeeb nkab lossis cuam tshuam cov khoom ntws. Tsis tas li ntawd, tshem tawm thiab ntxuav cov khoom ua kom huv si - xws li lub taub hau casting, cov khoom sib xyaw, thiab cov tshev valves - txhawm rau tshem tawm cov npuas huab cua los yog kev kho tsis zoo los ntawm kev sib xyaw seem. Tom qab ntxuav, cov yeeb nkab yog tshuab ziab khaub ncaws- kom qhuav kom tsis txhob muaj cov kuab tshuaj residual los ntawm kev ua haujlwm nrog MDI raw khoom.
IV. INTRODUCTION Kev Tshaj Tawm Txhua Xyoo thiab Kev Kho Kom Zoo (System-Wide Performance Optimization)
Tag nrho lub tshuab tau kho dua tshiab txhua xyoo kom ntseeg tau ntev - lub sijhawm ruaj khov. Cov txheej txheem no yuav tsum tau ua kom tiav cov khoom tso tsheb hlau luam, tshem tawm tag nrho cov kav dej, ua kom huv si thiab tshem tawm, thiab hloov cov kav dej laus, cov lim dej puas thiab hnav cov ntsaws ruaj ruaj. Hloov cov roj hydraulic thiab lubricants; txheeb xyuas qhov tseeb ntawm lub tshuab cua sov, ntsuas kub thiab ntsuas ntsuas; calibrate casting flow thiab mixing ratio. Tsis tas li ntawd, tshawb xyuas lub twj tso kua mis hnav thiab tsim kua muag, hloov qhov hnav hnyav lossis kev laus cov ntsiab lus hauv lub sijhawm, tshem tawm cov kev ua yuam kev, thiab rov qab kho cov cuab yeej mus rau qhov qub lub Hoobkas ua haujlwm raug.
Cov txheej txheem tu thaum muaj xwm txheej ceev raws li kev ua haujlwm tshwj xeeb.
Ntxiv nrog rau kev saib xyuas tsis tu ncua, kev saib xyuas ntxiv yog xav tau nyob rau hauv kev ua haujlwm tshwj xeeb. Kev tu cov kav dej yuav tsum tau luv luv mus rau ib zaug txhua ob lub lis piam thaum cov khoom siv ua haujlwm ntawm lub zog tag nrho, hauv qhov chaw ua haujlwm kub, ntub dej, lossis hauv kev tsim cov khoom siv raw khoom nquag hloov. Yog tias cov khoom siv tsis ua haujlwm ntev dua 72 teev, cov khoom siv raw yuav tsum tau ntws los ntawm cov kav dej, lub kaw lus yuav tsum tau muab kaw thiab khaws cia, thiab cov kav dej thiab cov khoom tso tsheb hlau luam yuav tsum tau ntxuav kom huv si ua ntej rov qhib dua, tiv thaiv crystallization, solidification thiab blockage ntawm cov kav dej. Yog tias cov txheej txheem ntau lawm zoo li qeeb, siab tsis ruaj khov, batch defects, thiab lwm yam, nws yog ib qho tsim nyog yuav tsum tau tam sim ntawd nres qhov kev soj ntsuam, ntxuav cov yeeb nkab tsis huv, tsis txhob tos rau lub sijhawm tu ncua.
VI. INTRODUCTION Maintenance summary and core values
Kev saib xyuas ntawm MDI elastomer casting tshuab ua raws li cov hauv paus ntsiab lus ntawm "kev tshuaj xyuas txhua hnub, kev saib xyuas txhua lub limtiam, kev tu txhua hli, kev tu txhua xyoo," nrog kev tu txhua hli ntawm cov khoom tso tsheb hlau luam thiab cov kav dej yog qhov tseem ceeb tshaj plaws. Standardization thiab kev saib xyuas ib ntus tuaj yeem daws cov teeb meem kev lag luam zoo xws li cov khoom seem MDI jamming, sib xyaw qhov sib txawv thiab cov khoom tsis xws luag, yog li stabilizing cov khoom zoo, txo cov cuab yeej tsis ua hauj lwm thiab tus nqi tu, ncua kev pab cuam lub neej, thiab ua kom ruaj khov, ua haujlwm zoo thiab ua raws cov kab ntau lawm.