Dab tsi yog Cov Txheej Txheem Txheej Txheem ntawm Plywood?

Flat pressed plywood yog kab rov tav ua ke txoj kev, nyob rau hauv uas txhua daim ntawm veneer yog precisely txiav, npaj, thiab coated nrog kua nplaum. Lub pem hauv ntej yog tig mus rau sab saud, thiab peb txheej thaum uas tig mus yog stacked thiab muab tso rau hauv ib tug high-kub xovxwm. Lub siab yog siv los ntawm ob qho tib si pem hauv ntej thiab sab kev taw qhia kom solidify cov kua nplaum, ua rau hauv pem teb. Lub veneer nyob rau hauv pem hauv ntej ntawm lub tiaj tiaj plywood tau ua tib zoo xaiv thiab yuav luag tsis muaj qhov tsis xws luag vim tias lub hauv ntej ntawm lub plywood ib txwm tig mus rau sab saud, uas cov neeg tuaj yeem ntsib txhua hnub. Yog tias muaj qhov tsis xws luag, nws yuav tsis ua kom zoo nkauj. Tab sis rau nruab nrab thiab sab nraub qaum ntawm cov plywood tiaj tiaj, feem ntau siv cov veneer qib thib ob (piv txwv li, nrog cov xim sib txawv, cov npoo tsis tiav, qhov dav sib txawv, qhov me me, thiab lwm yam), vim tias sab nraub qaum ntawm lub ntsej muag, cov teeb meem no. yuav tsis cuam tshuam rau kev siv cov plywood ib txwm, thiab lawv yuav tsis ua rau kev puas tsuaj.
Side pressed plywood yog ib qho kev sib xyaw ua ke ntev, nyob rau hauv txhua qhov kho veneer yog tsim nrog sab ntawm veneer tig mus rau sab saud. Raws li sab muaj lub siab tshaj plaws load-bearing muaj peev xwm, nws yog glued thiab nias rau hauv cov duab los ntawm lub tshuab xovxwm. Lub veneer ntawm sab pressed plywood yog yuav luag zoo meej thiab tsis tuaj yeem muaj qhov tsis xws luag, txwv tsis pub nws cuam tshuam ncaj qha rau cov tsos ntawm sab pressed hnyav-duty plywood. Cov kev cai rau cov veneer yog siab heev, cov khoom poob yog loj, cov txheej txheem ntau lawm yog complex, thiab cov kev tswj kom zoo yuav tsum nruj dua. Cov kev taw qhia ntawm ntub nthuav dav thiab ziab shrinkage ntawm sab nias plywood yog nyob rau sab saum toj, thiab qhov nthuav dav thiab shrinkage tsuas yog hloov pauv ntawm cov thickness kev taw qhia. Yog li ntawd, nws muaj zoo heev deformation kuj thiab stability, tshwj xeeb kev ntxhib los mos, thiab yog ib qho ntawm cov khoom saum toj kawg nkaus hauv plywood.
Lub hauv paus ntawm cov plywood yog ib lub mesh xyoob pob, uas yog ib tug xoob mesh fiber bundles tsim los ntawm thawj thinning ntoo mus rau hauv ib tug tas mus li, cross-linked thiab tswj cov thawj kev npaj ntawm fibers. Tom qab ntawd nws yog qhuav, glued, tsim rau hauv ib lub billet, txias pressed los yog kub pressed rau hauv ib lub phaj zoo li los yog lwm yam khoom. Qhov loj tshaj plaws ntawm plywood yog kom tag nrho thiab tsim nyog siv cov yam ntxwv ntawm cov ntaub ntawv ntoo fiber ntau, kom ntseeg tau tias siv cov ntoo siab thaum khaws nws cov khoom qub. Plywood tuaj yeem ua kom muaj kev siv ntau tshaj plaws ntawm cov khoom siv ntoo, tshwj xeeb tshaj yog cov peev txheej me me uas tseem tsis tau siv kom zoo. Nws qhov ntom ntom thiab hardness yog ho ua rau siab dua li cov tiaj tiaj tus plywood thiab sab nias plywood, ua rau cov plywood, ua rau cov plywood. Plywood xav tau cov khoom siv raw feem ntau, ua rau tus nqi siab tshaj.