Hauv kev lag luam ua yeeb yaj kiab, traction rotating mechanism ntawmrub- tawm lub tshuab ua zaj duab xisyog lub hauv paus tseem ceeb los xyuas kom meej cov yeeb yaj kiab tsis sib xws. Cov qauv tsim ua ke nrog cov tshuab, cov khoom siv science, thermodynamics, thiab lwm yam, thiab paub txog kev tswj kom raug ntawm ob qho tib si longitudinal thiab transverse cov lus qhia tsis sib xws deformation ntawm zaj duab xis los ntawm ntau- kev sib koom tes tswj. Nyob rau hauv cov ntaub ntawv no, cov txheej txheem ntawm uniform stretching yog soj ntsuam systematically los ntawm plaub qhov tseem ceeb qhov ntev: cov qauv muaj pes tsawg leeg, kev tswj kev txav, tswj qhov kub thiab txias.
1. Cov Qauv Txheej Txheem: Ntau - cov menyuam sib koom ua ke Mechanical Transmission System
Lub hauv paus ntawm cov traction rotating mechanism muaj ob peb txheej ntawm rotating yob, nrog rau preheating yob, stretching yob, txias yob thiab flattening yob. Cov chais no ua tiav cov neeg kho tshuab kev sib kis tau zoo los ntawm cov kab sib txawv, kev sib tw nrawm, thiab kev teeb tsa spatial. Covrub- tawm lub tshuab ua zaj duab xistso siab rau qhov no multi-roller system kom tswj tau qhov sib txawv nro faib thoob plaws qhov dav ntawm zaj duab xis.
1.1 Qib Stretching Roll System
Cov kev teeb tsa ib txwm siv rau `` txoj kab uas hla me me - loj txoj kab uas hla” rotary yob khub. Piv txwv li, txoj kab uas hla ntawm thawj theem stretching cov menyuam yog nyob nruab nrab ntawm 80 thiab 120 mm, thiab txoj kab uas hla ntawm lub thib ob theem stretching roller yog nyob nruab nrab ntawm 150–200 mm. Yog hais tias zaj duab xis dhau los ntawm ib tug yob tshuab ntawm cov kab sib txawv ntawm cov kab sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov kab sib txawv. Thawj theem dov ntawm 50m / min, theem thib ob yob ntawm 80m / min, nrog rau qhov sib npaug ntawm qhov ntev mus txog 1.6 npaug ntawm qhov kev tsim hierarchical no tiv thaiv kev ntxhov siab los ntawm ib theem ntawm qhov nro thiab ua kom lub cev tsis sib haum xeeb.
1.2 Peb -Dimensional Spatial Layout
Cov txheej txheem rau cov menyuam yog staggered nrog ib tug ``Z "los yog "S" qauv, thiab qhov siab qhov sib txawv ntawm cov menyuam uas nyob ib sab yog tuav ntawm 50 - 100 mm. Qhov layout no tsim ib txoj kev wavy rau zaj duab xis txoj kev taug kev, ncua qhov ntev ntawm txoj kev ncab. Piv txwv li, nyob rau hauv kev tsim ntawm peb - txheej co- PE zaj duab xis tso rau hauv qhov ntev ntawm txoj kev LD. nyob rau hauv 0.8 vib nas this, txo lub sij hawm deformation los ntawm 30% piv rau linear layout, thiab txo qhov kev pheej hmoo ntawm overheating hauv zos.
1.3 Kev tsim tshwj xeeb ntawm Flattening Rolls
Lub davhlau ya nyob twg theem yog nruab nrog hneev -zoo li tus flattening rolls nrog ib tug nkhaus ncej nrog ib tug deflection ntawm 2-5 mm thiab coated nrog silicone roj hmab. Thaum cov zaj duab xis kov lub yob nto ntawm 15℃inclination lub kaum sab xis, cov nplooj ntawv helical lub caij nplooj ntoos hlav ua rau lub zog ntawm 0.5-1.2 N / cm, tshem tawm cov ntug curling zoo. Kev sim cov ntaub ntawv qhia tau hais tias hneev -zoo li tus flattening yob ntawm zaj duab xis tuaj yeem nce 92% thiab qhov poob ntawm ntug tuaj yeem txo qis dua 3%.
2. Motion Control: Lub Dynamic Regulating System ntawm Synchronized Speed Ratios
Dynamic matching ntawm kab ceev ntawm ntau- yob system yog ua tiav los ntawm kev sib koom tes tswj ntawm servo motors thiab zaus converters. Nws cov thev naus laus zis tseem ceeb suav nrog:
2.1 Kaw-Loop Control ntawm Draw Ratio
Laser ceev sensors tsis tu ncua saib xyuas cov kab nrawm ntawm zaj duab xis thiab muab lub sijhawm tiag tiag - lub sijhawm tawm tswv yim rau PLC tswj qhov system. Qhov zaus ntawm tus tsav lub cev muaj zog tau hloov kho thaum qhov kev hloov pauv ceev ntau dua ± 0.5%. Piv txwv li PID algorithm PID algorithm tswj qhov sib piv tensile ntawm 5.2 ± 0.1 rau kev tsim 20-μm-thick BOPP zaj duab xis, kom ntseeg tau tias tus qauv sib txawv ntawm qhov ntev tensile zog tsawg dua los yog sib npaug rau 0.8 MPa.
2.2 Sib txawv ceev Stretching Technology
Transverse stretching yog tiav los ntawm qhov sib txawv ntawm qhov kawg ntawm kev taw qhia rail thiab lub fixture. Thaum qhov sib txawv ntawm fixtures widens los ntawm 100 hli mus rau 400 hli, cov lus qhia dav nqaim ib txhij, uas ua rau ib tug transverse stretching piv ntawm 4 zaug. Lub caij nplooj ntoos hlav- txuas txuas tsim los ntawm Montedison (Ltalis) tuav clamping stability nrog lub caij nplooj ntoos hlav quab yuam ntawm 0.3-0.5 N / mm thiab transverse thickness variation ntawm + -± 1.5%.
2.3 Rotary Oscillation Mechanism
Qee cov qauv siab- kawg siv 360-degree rotary disassembly li uas hloov cov kev taw qhia ntawm lub zog thaum lawv ncab zaj duab xis. Bayer's patented thev naus laus zis qhia tau hais tias 60 spin ib feeb tuaj yeem txhim kho qhov sib xws ntawm kev ntxhov siab hauv daim nyias nyias los ntawm 40%, tshwj xeeb tshaj yog rau cov yeeb yaj kiab kho qhov muag. Niaj hnubrub- tawm lub tshuab ua zaj duab xisCov qauv tsim tau nce ntxiv xws li cov lus teb oscillation los txhim kho cov yeeb yaj kiab zoo.
3. Kev tswj qhov kub thiab txias: gradient cua sov system nrog Deformation Control
Kub uniformity ncaj qha cuam tshuam rau zaj duab xis crystallinity thiab stretching kev ua tau zoo. Lub traction rotating mechanism ua tiav qhov kev tswj xyuas thermal los ntawm peb -theem kub tswj qhov system:
3.1 Infrared Cua sov ntawm Preheating Section
Short-wave infrared heaters nrog wavelengths ntawm 2-10 microns thiab lub zog ceev ntawm 80-120 W / cm2 tau ua haujlwm. Reflective panels tsub kom qhov kub ntawm qhov kev ua tau zoo rau 95% thiab cov yeeb yaj kiab saum npoo kub mus rau 120-140℃hauv 0.5 vib nas this. Cov kev sim qhia tau hais tias txoj kev cua sov no txo cov thickness variation ntawm preheating seem rau ± 0.8 microns.
3.2 Thermal 3.2 Cov Cuab Yeej Kub Kub hauv qhov txuas ntxiv
Lub zigzag kub Zigzag- zoo li cov cua kub ducts yog teem nyob ib ncig ntawm lub stretching roller, thiab lub qhov hluav taws xob ntawm cov cua kub yeeb nkab yog nyob rau ntawm℃mus rau cov kev taw qhia ntawm cov zaj duab xis. Ib txheej thermal ciam teb ntawm 0.5-1.0 hli tuab tuaj yeem tsim los ntawm kev tswj cov huab cua tshaj tawm ntawm 0.8 -1.2 m / s. Toray's (Nyiv) cov ntaub ntawv soj ntsuam qhia tau hais tias qhov kev tsim no zoo tiv thaiv cov khoom siv lead ua tsis xws luag los ntawm lub zos overheating los ntawm kev tswj hwm tus qauv sib txawv ntawm daim nyias nyias qhov ntsuas kub tsawg dua lossis sib npaug li 1.5℃hauv qhov ncab.
3.3 Kev ua kom txias nrawm kom ruaj khov ntawm qhov txias ntu
Qhov kub ntawm cov yeeb yaj kiab tuaj yeem raug txo kom tsawg dua 60℃hauv 0.3 vib nas this los ntawm circulating dej chromium plating txias cov menyuam ntawm 15 ° C. Cov menyuam txias yog me ntsis sai dua qhov traction ceev (1: 1.02) los tiv thaiv wrinkles los ntawm kev tsim raws li cov zaj duab xis contraction. Brückner's (Lub Tebchaws Yelemees) cov ntaub ntawv kawm qhia tau hais tias qhov txheej txheem cua txias no txo qis thermal shrinkage kom qis dua 0.3%.
4. Kev tswj nruj: kev tswj xyuas ruaj khov nrog kev them nyiaj dynamic
Kev sib hloov ntawm kev sib hloov yog qhov tseem ceeb ntawm qhov tsis sib xws ntawm zaj duab xis tensile. Lub traction rotating mechanism ua tiav dynamic equilibrium los ntawm multistage nro tswj:
4.1 Cov kev cai tseem ceeb los ntawm Sib Nqus Particle Nres
Sib nqus particle brakes yog ntsia rau hauv lub loosening ntaus ntawv thiab tswj lub nres torque los ntawm kev kho cov tam sim no. Thaum cov yeeb yaj kiab nro tshaj qhov teeb tsa tus nqi, lub kaw lus cia li txo qhov nres tam sim no, txwv qhov kev hloov pauv mus rau ± 0.2 N / m. Hyosung's (South Kaus Lim Qab Teb) daim ntawv thov qhia tau hais tias cov txheej txheem tuaj yeem txo tus qauv sib txawv ntawm cov yeeb yaj kiab qhov tawg elongation mus rau 3.2%.
4.2 Tiag -lub sij hawm soj ntsuam ntawm Ultrasonic Tension Sensors
Ultrasonic nro sensors ntsia nyob rau hauv lub stretch ua hauj lwm ntawm ib tug sampling zaus ntawm 1,000 zaug ib ob. Thaum pom tau tias muaj kev hloov pauv ntawm qhov nro, lub kaw lus kho qhov ceev ntawm lub tshuab tsav hauv 20 milliseconds. Piv txwv li, thaum nro nce los ntawm 0.5 N / m, PLC txo servo lub cev muaj zog ceev los ntawm 0.3% los kho qhov nro ruaj khov.
4.3 Kev Pabcuam Tswjhwm los ntawm cov cuab yeej tshem tawm zoo li qub
Cov cua txias tau nruab nrog ob sab electrostatic tshem tawm ntawm ± 7 kV, uas neutralized tus nqi ntawm cov zaj duab xis nto thiab txo qhov hluav taws xob zoo li qub los ntawm ± 5 kV rau ± 0.5 kV. Kev ntsuam xyuas los ntawm 3M (USA) qhia tau hais tias electrostatic tshem tawm txhim kho winding neatness los ntawm 85% thiab txo qhov nro heterogeneity los ntawm electrostatic adhesion.
V. Daim Ntawv Thov Case: Biaxial Orientation BOPET Films
Ib lub tuam txhab siv kev txhim kho traction rotating mechanism los tsim 12-μm BOPET zaj duab xis, tswj cov ntsiab lus tseem ceeb raws li hauv qab no:
Longitudinal stretching: 130℃hauv preheating, 145℃hauv stretching thiab 3.8 npaug ntawm tensile piv.
Transverse stretching: 125℃ua ntej-heated, 140℃tensile, 4.2x tensile ratio
Kev tswj nruj: tso tawm N / m, stretch seem nro N / m, coil nro 22N / m.
Cov ntaub ntawv ntau lawm tau pom tias tus qauv sib txawv longitudinal tensile lub zog txo los ntawm 1.2 MPa rau 0.7 MPa, qhov sib txawv ntawm lateral thickness txo los ntawm 3.2 μm mus rau 1.8 μm, thiab cov khoom tsim nyog tus nqi nce mus rau 98.5%. Qhov piv txwv no txheeb xyuas qhov ua tau zoo ntawm ntau- qhov kev tswj xyuas qhov system hauv kev tsaws iav rotation mechanism. Covrub- tawm lub tshuab ua zaj duab xissiv nyob rau hauv cov ntaub ntawv no qhia tau tshwj xeeb kev ua tau zoo nyob rau hauv kev ua tau zoo xws li biaxial orientation.
Xaus
Los ntawm cov qauv kev ua kom zoo dua qub, kev tswj cov lus tsa suab, kev tswj qhov kub thiab txias, cov txheej txheem thev naus laus zis ntawm cov yeeb yaj kiab tensile yog tsim. Raws li covrub- tawm lub tshuab ua zaj duab xistxuas ntxiv mus hloov zuj zus, yav tom ntej iterations yuav txhim kho nyob rau hauv cov kev taw qhia ntawm cov neeg siab, efficiency thiab txawj ntse, muab kev pab cuam tseem ceeb rau kev tsim cov high - films kawg.
