Taw qhia: Lub luag haujlwm ntawm Cov Khoom Siv Plywood hauv Kev Tsim Kho Niaj Hnub No
Structure plywood yog ib qho ntawm cov khoom siv dav siv hauv cov khoom siv ntoo hauv kev tsim kho thiab kev lag luam. Tsim los muab lub zog, qhov ruaj khov, thiab thauj khoom- kev ua haujlwm ntawm cov kabmob, nws ua lub luag haujlwm tseem ceeb hauv ob qho tib si hauv tsev thiab kev lag luam.
Tsis zoo li cov vaj huam sib luag zoo nkauj, cov khoom siv plywood feem ntau raug soj ntsuam raws li cov khoom siv kho tshuab, kev sib txuas ua haujlwm, thiab ua raws li cov qauv qauv. Raws li kev tsim kho txuas ntxiv mus thoob ntiaj teb, cov txheej txheem plywood tseem yog cov khoom siv hauv paus thoob plaws ntau lub khw.
Tsab ntawv xov xwm no muab cov txheej txheem kev tshaj lij ntawm cov txheej txheem plywood, tsom rau nws cov khoom sib xyaw, kev faib tawm, cov yam ntxwv ntawm kev ua tau zoo, thiab kev siv tiag - ntiaj teb no.
1. Cov Plywood yog dab tsi?
Structure plywood yog ib lub vaj huam sib luag tsim los ntawm kev sib txuas ntau txheej ntawm cov ntoo veneer ua ke nrog cov nplaum nyob rau hauv tshav kub thiab siab. Cov veneers feem ntau yog teem rau hauv ib qho khib ntawm cov khaubncaws sab nraud povtseg, nrog cov lis kev taw qhia ntawm cov khaubncaws sab nraud povtseg oriented perpendicular rau ib leeg.
Qhov ntoo khaub lig- laminated qauv no txhim kho lub zog, txo qhov txav ntawm qhov ntev, thiab txhim kho kev tiv thaiv kev tawg thiab kev sib tsoo hauv qab load.
Cov qauv plywood tshwj xeeb yog tsim los ua kom tau raws li cov khoom thauj -cov kabmob thiab cov kav ntev raws li cov qauv hauv tebchaws lossis thoob ntiaj teb.
2. Veneer Structure thiab Core Composition
2.1 Hla-Laminated Kev Tsim Kho
Lub ntsiab lus ntawm cov qauv plywood yog nws tus ntoo khaub lig- laminated veneer qauv:
Odd-ntau txheej txheej (3-ply, 5-ply, 7-ply, thiab lwm yam)
Alternating grain orientation
Kev tsim vaj huam sib luag sib npaug
Qhov kev tsim no ua kom muaj kev sib txawv ntawm kev ntxhov siab thiab txhim kho khoov lub zog hauv ob qho tib si.
2.2 Hom Ntoo Ntoo Siv
Cov qauv plywood tuaj yeem tsim los siv cov ntoo tawv lossis cov ntoo mos, nyob ntawm thaj chaw muaj thiab cov ntawv thov.
Hom softwood muaj xws li:
Pine
Spruce
Fir
Larch
Common hardwood hom muaj xws li:
Poplar
Birch
Mixed tropical hardwoods
Qhov kev xaiv ntawm hom muaj feem xyuam rau qhov ntom, lub zog, thiab qhov hnyav ntawm lub vaj huam sib luag zaum kawg.
3. Adhesive Systems thiab Bonding Performance
Adhesive kev ua tau zoo yog qhov tseem ceeb ntawm cov txheej txheem plywood zoo.
Common adhesive systems muaj xws li:
Phenol-formaldehyde (PF) rau sab nrauv- qib plywood
Melamine-urea-formaldehyde (MUF) rau ib nrab- daim ntaub ntawv sab nrauv
Urea-formaldehyde (UF) rau kev siv sab hauv
Sab nrauv plywood feem ntau xav tau dej- tiv taus lossis boil- pov thawj kev sib txuas kom ntseeg tau ntev - lub sij hawm ua haujlwm nyob rau hauv ib puag ncig sib txawv.
4. Kev faib tawm los ntawm Daim Ntawv Thov thiab Kev Ua Haujlwm
Cov txheej txheem plywood tuaj yeem raug categorized raws li kev siv:
4.1 Sab hauv Cov Plywood
Tsim kom qhuav, tswj ib puag ncig
Siv rau hauv pem teb underlayment, phab ntsa sheathing, thiab rooj tog vaj tse
4.2 Sab nrauv Plywood
Tsim nrog huab cua-cov nplaum nplaum
Haum rau vov tsev, formwork, thiab sab nrauv phab ntsa
4.3 Marine thiab Tshwj Xeeb -Purpose Structural Plywood
Txhim khu kev sib txuas thiab veneer zoo
Siv nyob rau hauv siab -humidity lossis load- ib puag ncig tseem ceeb
5. Mechanical Properties thiab Performance Factors
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm ntawm cov plywood muaj xws li:
Modulus ntawm elasticity (MOE)
Modulus ntawm rupture (MOR)
Shear zog
Ntsia hlau- tuav peev xwm
Thickness kam rau ua thiab vaj huam sib luag flatness
Kev tsim khoom zoo ib yam thiab kev tswj xyuas zoo yog qhov tseem ceeb los xyuas kom ntseeg tau tias kev ua tau zoo hauv cov qauv siv.
6. Kev siv ntau yam ntawm cov Plywood
Structure plywood yog siv dav hauv kev lag luam, suav nrog:
Pem teb systems thiab subflooring
Phab ntsa thiab ru tsev sheathing
Qhob formwork
Ntim thiab industrial crating
Cov qauv ib ntus thiab scaffolding
Nws versatility ua rau nws nyiam cov khoom siv nyob rau hauv ob qho tib si ruaj khov thiab ib ntus kev tsim kho tshuab.
7. Cov qauv thiab ntawv pov thawj
Nyob ntawm lub hom phiaj kev lag luam, cov txheej txheem plywood tuaj yeem ua raws li cov qauv xws li:
EN cov qauv (Tebchaws Europe)
APA / PS cov qauv (North America)
AS / NZS cov qauv (Australia thiab New Zealand)
Daim ntawv pov thawj ua kom ntseeg tau tias cov vaj huam sib luag ua tau raws li kev ua tau zoo, kev nyab xeeb, thiab ib puag ncig yuav tsum tau ua.
Xaus: Cov khoom siv txhim khu kev qha rau kev ua haujlwm zoo
Cov txheej txheem plywood txuas ntxiv ua cov khoom siv tseem ceeb hauv kev tsim kho niaj hnub vim nws lub zog, ruaj khov, thiab yoog raws. Thaum tsim thiab tsim kom raug, nws muaj qhov sib npaug ntawm kev ua tau zoo thiab kev ua haujlwm zoo.
Raws li kev coj ua hauv tsev nce ntxiv hais txog kev ruaj ntseg, kev nyab xeeb, thiab kev ruaj ntseg, cov khoom siv plywood tseem yog ib qho tseem ceeb hauv cov kev daws teeb meem ntoo.
