Cov txheej txheem plywood yog qhov siab -}}} Kev ua lag luam tshuab siv dav hauv tsev, choj, nkoj, thiab tsheb thauj mus los. Nws cov khoom siv zoo dua thiab kav ntev ua rau nws tseem ceeb tiv thaiv ntawm niaj hnub tsim cov qauv. Qhov muaj pes tsawg leeg ntawm cov txheej txheem plywood muaj feem cuam tshuam nrog ntau cov kauj ruam tseem ceeb, kev ua ntaub ntawv nplaum, Lamination, thiab tshaj tawm {3} {{kev ua. Txhua kauj ruam cuam tshuam cuam tshuam lub zog, kev ruaj khov, thiab kev pabcuam lub neej ntawm cov khoom kawg.
Ua ntej, txheej txheem plywood feem ntau yog tsim los ntawm high - zoo woods xws li birch, fir, ntoo thoj, lossis xyoob ntoo. Cov ntoo no muaj qhov ntom ntom ntom thiab cov khaub ncaws hnav zoo, muab cov khoom siv neeg kho zoo tshaj plaws. Ua ntej kev ua tiav, cov ntoo yuav tsum qhuav kom tswj cov ntsiab lus ya raws ntawm 8% thiab 12% los tiv thaiv kev tawm tsam lossis tawg ntawm cov plywood vim tias noo kev hloov pauv. Tom qab ziab, ntoo yog txiav rau hauv Veneers ntawm cov tuab tuab, feem ntau 1.5 txog 4 hli. Qhov kev sib txuam ntawm veneure thickness ncaj qha cuam tshuam rau tag nrho lub zog ntawm cov plywood.
Thib ob, qhov kev xaiv ntawm cov nplaum yog cov kauj ruam tseem ceeb hauv kev tsim cov qauv txheej txheem plywood. Cov nplaum uas siv tau suav nrog cov khoom lag luam phenolic suav nrog Resin (PF), urrea {1} {{{{hloov nplaum nplaum (muf). Phenolic Resin yog qhov kev xaiv ua qhov zoo tshaj plaws rau cov txheej txheem plywood vim nws cov dej tsis kam ua tau zoo thiab siab {4} kub tsis kam. Cov nplaum yuav tsum yog tusyees thov rau veneer nto, feem ntau ntawm tus nqi ntawm 150-300 g / m2, los xyuas kom muaj zog txaus. Niaj hnub nimno ntau lawm cov txheej txheem feem ntau siv cov khoom siv nplaum kom zoo dua los txhim kho cov nplaum faib khoom thiab ntau lawm.
Hauv cov txheej txheem lamination, pas dej yog cov qauv staggered, xws li nrog tus lej khib nyiab (xws li 7) los xyuas kom meej cov khoom siv hluav taws xob hauv txhua qhov kev qhia. Thaum lub sij hawm lamination txheej txheem, cov pas dej tau nias hauv qab qhov kub (100-150 degree) thiab muaj kev kho siab zoo (0.8 MPA) kom tau kho cov nplaum thiab ua tiav. Lub sijhawm nias lub sijhawm sib txawv raws li cov nplaum thiab cov tuab tuab ntawm veneer, feem ntau yog kwv yees li ob peb feeb.
Finally, after pressing, structural plywood requires post-processing, including trimming, sanding, and inspection. TRIMMING ntseeg tau qhov tseeb qhov ntev, thaum sanding txhim kho saum npoo tsev rau kev ua tiav lossis pleev xim. Kev kuaj xyuas suav nrog kev ntsuas lub zog, kev soj ntsuam dej tsis txaus ntseeg kom ua tau raws li cov qauv kev ua raws li cov qauv (xws li BS (as) D5456).
Hauv cov ntsiab lus, kev tsim kho cov txheej txheem plywood yog cov txheej txheem sib xyaw thiab cov txheej txheem ua haujlwm tau nrog kev ua kom zoo ntawm cov khoom siv science, nplaum thev naus laus zis, thiab cov txheej txheem tsim khoom. Los ntawm kev tswj hwm nruj heev, cov plywood ua tau raws li lub zog siab, kav ntev, thiab ib puag ncig ntawm cov khoom siv niaj hnub, ua ib qho khoom siv tsis tau muaj nqis.
