Zaj duab xis wrinkling yog ib qho kev tsis zoo nyob rau hauv cov txheej txheem tshuab, tshwj xeeb tshaj yog nyob rau hauv zus tau tej cov ABA peb - txheej extrusion tshuab tshuab. Raws li kev coj noj coj ua hauv kev lag luam thiab cov cuab yeej siv, daim ntawv no txheeb xyuas qhov ua rau wrinkling ntawm cov cuab yeej systematically los ntawm plaub qhov ntev: kev teeb tsa ntawm cov khoom siv, kev tswj cov txheej txheem, kev tswj cov khoom siv raw thiab kev ua kom txias txias, thiab muab tso rau cov tswv yim daws teeb meem los muab kev qhia rau kev lag luam.
Cov cuab yeej txhim kho thiab cov cuab yeej siv kho kom zoo
1.1 Tuag Lub Taub Hau Leveling CalibrationMisalignment ntawm lub taub hau tuag yog qhov ncaj qha ua rau qhov tsis sib xws ntawm cov yeeb yaj kiab transverse. Thaum lub axes ntawm lub taub hau tuag tsim ib lub kaum sab xis rau cov kev taw qhia ntawm traction, asymmetric yaj ntws tshwm sim thaum lub sij hawm tuag extrusion, uas ua rau ib tug thawj tsis xws luag ntawm "thicker ntawm ib sab thiab thinner rau lwm yam." Cov thickness variations loj hlob raws li tus npuas inflation thiab nws thiaj li manifest raws li periodic folds.
Kev daws:
Siv lub laser leveler los tshuaj xyuas qhov chaw teeb tsa tuag kom paub meej tias qhov kev ua yuam kev tsawg dua lossis sib npaug li 0.05mm / m
Kho tuag lub taub hau kev txhawb nqa bolts rau kev nce qib calibration siv "kab pheeb suab hloov zawm" txoj kev
Lub sijhawm tshawb xyuas cov khoom sib khi ntawm lub taub hau tuag fastening bolt kom tiv thaiv kev vibration ntau lawm los ntawm kev tsim tawm.
1.2 Sib tsoo Board Geometric Parameter Optimization rau qhov tsua-hauv daim hlau
Lub kaum sab xis, nto roughness thiab symmetry ntawm folding phaj ncaj qha cuam tshuam rau zaj duab xis flatness. Ib qho kev tshawb fawb pom tau tias 62% txo qis ntawm wrinkles los ntawm kev txo lub kaum sab xis ntawm lub phaj folding ntawm 60 degrees mus rau 45 degrees.
Optimization Points:
Lub kaum sab xis xaiv: xam cov npuas taub nrog theta=2artan (D/2L), uas D yog npuas txoj kab uas hla thiab L yog nyob deb ntawm qhov tuag mus rau quav phaj
Kev kho deg: Hard chromium plating nrog nto roughness Tsawg dua los yog sib npaug rau 0.2 μm
Symmetry calibration: validation ntawm spatial txoj hauj lwm sib txawv tsawg tshaj li los yog sib npaug rau 0.1 hli ntawm sab laug / txoj cai daim hlau siv lub tshuab ntsuas kev sib koom tes
1.3 Haul-tawm Roll System Maintenance
Lub parallelism, siab uniformity thiab nto qhov chaw ntawm lub unloading roller muaj ib qho tseem ceeb cuam tshuam rau cov zaj duab xis nro tswj cov zaj duab xis. Ib rooj plaub ntawm lub Hoobkas tau qhia tias yob bearings dov bearings 0.3mm radial runout, ua rau qhov ntev ntev wrinkling.
Maintenance Specifications:
Tshawb xyuas txhua hnub rau khawb ntawm cov nplaum lossis cov menyuam nto
Kev ntsuas txhua lub limtiam radial runout siv cov ntsuas dial thiab hloov cov kabmob sai li sai tau raws li qhov txwv tau dhau lawm
Kev ntsuam xyuas kev faib tawm txhua hli tau ua kom ntseeg tau tias sab laug - txoj cai Tsawg dua lossis sib npaug li 5% qhov sib txawv siab
Precise Process Parameter Control
2.1 Tshuab- nce piv thiab kos qhov sib piv sib piv
Synergy between magnification and tensile ratio determines the orientation of the films. When BUR>3.5 and DDR<4.0, excessive transverse stretching results in wrinkles. DOE experiments determined optimal parameters LDPE/LLDPE blends: BUR=3.0±0.2, DDR=4.5±0.3.
Tswj Qhov Tseem Ceeb:
Tsim cov txheej txheem parameter matrices los txiav txim qhov ntau ntawm cov khoom sib txawv / tuab
Kev teeb tsa ntawm lub ntsuas ntsuas hauv online rau qhov tiag -lub sij hawm saib xyuas ntawm MD/TD thickness
Kev ua tiav ntawm Kev Siv PID tswj algorithms rau khov kho traction lub cev muaj zog ceev (hloov ntau yam tsawg dua lossis sib npaug li 0.5%)
2.2 Melt Temperature Profile Optimization
Cov kub yaj ntau dhau yuav txo tau qhov sib txuam ntawm cov saw hlau molecular thiab txo lub zog ntawm cov yaj; Qhov kub tsis txaus tuaj yeem ua rau tsis zoo plasticization - ob qho tib si tuaj yeem ua rau npuas tsis ruaj khov. Cov kev tshawb fawb tau pom tias rau txhua txhua 10℃qhov kub thiab txias, npuas oscillation amplitude nce 23%.
Temperature Control Strategies:
Zonal kub tswj: 160-180℃hauv cheeb tsam pub, 180-200℃compression cheeb tsam, 200-220℃hauv cheeb tsam metering
Precision tuag lub taub hau kub tswj: roj lub voj voog cua sov Tsawg dua lossis sib npaug li 1℃hloov pauv
Screw ceev- qhov kub thiab txias linkage: thaum cov ntsia hlau ceev yog siab tshaj 80 rpm, qhov kub ntawm qhov ntsuas qhov ntsuas tau cia li nce li 5℃los them rau cov cua sov shear
2.3 Kev ua kom txias txias ua kom muaj txiaj ntsig zoo
Wrinkles feem ntau yog tshwm sim los ntawm kev ua kom txias tsis txaus lossis tsis sib xws ntawm cov cua rings. Hauv ib rooj plaub ntawm kev lag luam, CFD simulation-kev ua kom zoo tshaj plaws huab cua lub nplhaib tsim ua rau 18% nce hauv kev ua kom txias thiab 41% txo qis hauv crease.
Cooling System Optimization:
Gas nplhaib hloov kho: doublelip tsim, ruaj khov ntws ntawm sab hauv di ncauj, sab nrauv di ncauj tswj npuas oscillation
Cua ntim tswj: Nruab Nruab qhov sib txawv ntawm lub tshuab nqus tsev thiab kho cov npuas taub hauv lub sijhawm (Cov Lus Qhia: 0.8-1.2m3 / min.kg)
Kev tswj qhov kub thiab txias: Txhim kho cov dej txias kom muaj cua txias ntawm 15-20 degree
Raw Material Quality and Formulation Management
3.1 Raw Material Preprocessing
Dej, impurities thiab cov khoom hnyav molecular hauv cov ntaub ntawv raw tuaj yeem ua rau cov yas tsis zoo thiab ua npuas tawg. Ib lub tuam txhab ua ntej cov txheej txheem txo cov wrinkles txuam nrog raw cov ntaub ntawv los ntawm 76%.
Preprocessing Standards:
Kev kho kom qhuav: LDPE / LLDPE tau qhuav ntawm 80℃rau 4 teev kom ncav cuag tsawg dua lossis sib npaug li 0.02% cov ntsiab lus noo noo noo noo.
Kev soj ntsuam pom: Cov khoom> 180 microns tshem tawm siv 80-mesh lim.
Homogeneous mixing: weightless feeder los xyuas kom meej txheej piv hloov pauv tsawg dua lossis sib npaug li 0.5%
3.2 Formulation Optimization
Qhov sib txawv ntawm qhov sib txawv ntawm qhov dej ntws (MFR) ncaj qha cuam tshuam rau cov khoom ntawm cov yeeb yaj kiab. Cov kev sim Orthogonal tau txheeb xyuas qhov zoo tshaj plaws tsis: Ib txheej (nto MFR=2.0}g / 10min min, thiab B (core core) MFR=0.8g / 10min ua cov khoom zoo tshaj plaws.
Formulation Design Principles:
Interlayer MFR Matching: Khaws qhov sib txawv ntawm cov txheej txheem saum npoo thiab cov txheej txheem tsawg dua lossis sib npaug li 1.5 g / 10 min
Containment koob tshuaj: Kho rau zaj duab xis thickness (< 20 micron film 0.3-0.5%)
Resistant xaiv: nano-silica muaj kev sib cais zoo dua li cov tshuaj talc
Kev soj ntsuam cov txheej txheem ntau lawm thiab Kev Cai Tswj
4.1 Kev soj ntsuam zoo hauv online
Txhawm rau tsim kom muaj peb- qhov kev soj ntsuam qhov ntev ntawm ``thick thiab tenuous theem" txhawm rau ua kom muaj kev ceeb toom ntxov ntxov. Ib lub tuam txhab kev tswj xyuas ntse yog 92 feem pua yog qhov tseeb hauv kev kwv yees wrinkles 15 feeb ua ntej.
Monitoring System Configuration:
Laser thickness gauges: 1000 kuaj / min zaus, ± 0.5μm raug
Tension sensors: 0-500N ntau, 0.1N daws teeb meem
Siab -Speed Camera: Microwrinkle Detection nrog 2000fps ncej tus nqi thiab cov duab ua algorithms
4.2 Cov txheej txheem tswj xyuas tshwj xeeb
Tsim cov qauv SOPs rau cov lus teb ceev ceev. Tej yam wrinkle tshem tawm tuav workflow:
Saib cov yam ntxwv wrinkle → Ntsuas wrinkle periodicity → Tshawb xyuas cov khoom siv sib xws → Kho cov txheej txheem tsis ua haujlwm → Tshawb xyuas cov txiaj ntsig → Cov ntaub ntawv khaws tseg
Case Analysis:
periodic transverse wrinkles nrog ib tug ntau lawm kab voj voog ntawm 1.2m:
Kho lub kaum sab xis ntawm 50 mus rau 40 degrees kom tshem tawm wrinkles
Sau cov feem ntau lub kaum sab xis parameters rau raw khoom ntau tus lej
Kev Tiv Thaiv Kev Tiv Thaiv thiab Kev Txhim Kho Nruam
5.1 Kev npaj kho khoom siv
Kev siv kev tiv thaiv kev tiv thaiv raws li TPM, tsom rau:
Tuag lub taub hau tu: Ultrasonic tu txhua 500 teev kom tshem tawm cov pa roj carbon deposits.
Kev tshuaj ntsuam xyuas: Kev tshuaj xyuas cov ntsia hlau raj tshem tawm txhua 2000 teev (hloov Ntau dua lossis sib npaug li 0.3 hli)
Kev kuaj xyuas hluav taws xob: kev txheeb xyuas peb lub hlis twg ntawm qhov tseeb ntawm inverter / sensor raug
5.2 Txheej txheem Database Building
Sau cov ntaub ntawv ntau lawm thiab tsim cov txheej txheem zoo ntsig txog cov qauv. Ib lub tuam txhab database qhia tias:
Qhov zoo tshaj plaws tuag lub taub hau kub ntau yam: 215-220℃nrog qis wrinkle tus nqi
Qhov zoo tshaj plaws towing ceev rau cov ntsia hlau ceev: 1.8 -2.2 rau kev pom zaj duab xis flatness
Xaus:
Kev daws ABA tshuab zaj duab xis tshuab wrinkle teeb meem yuav tsum muaj kev xav, los ntawm cov khoom siv precision thiab cov txheej txheem tswj mus rau raw khoom tswj thiab tswj cov txheej txheem. Kev siv cov kev daws teeb meem tau ua kom muaj kev lag luam rau:
Wrinkle tus nqi txo tau txo los ntawm 8.2% mus rau 1.5%
Thawj - kis tau tawm tau nce 27 feem pua ntawm cov ntsiab lus
19% kev txhim kho nyob rau hauv tag nrho cov cuab yeej siv tau zoo
Cov chaw tsim khoom yuav tsum kho cov kev daws teeb meem raws li cov yam ntxwv ntawm nws tus kheej cov cuab yeej, tsim kom muaj kev txhim kho txuas ntxiv, ntsuas kev ua haujlwm zoo ib ntus, ua kom zoo dua cov khoom tsis tu ncua, thiab thaum kawg ua tiav lub hom phiaj ntawm xoom wrinkle ntau lawm.
