Poplar Furniture Board

Poplar Furniture Board

Niaj hnub no, raws li lub caij hloov pauv, ntau tus phooj ywg ceev faj tau hais tias qee qhov Poplar Furniture Board uas tau siv txhua xyoo tau tawg mus rau qhov sib txawv.

Phab ntsa panels muaj qhov o ntawm tus nqi siab. Thaum cov vaj huam sib luag ntub dej, lawv yuav nqus dej noo thiab nthuav dav, thiab qhov ziab kom qhuav yuav yog qhov tseem ceeb, uas yuav ua rau phab ntsa deformation, thiab tseem ua rau tag nrho cov phab ntsa tawg. Nrog rau kev nqus dej siab, cov khoom siv yuav muaj kev cuam tshuam ntau dua rau cov dej yaig. Thaum kev sib koom ua tiav, cov dej hauv cov khoom siv sib koom tau sai sai absorbed los ntawm calcium silicate board, uas cuam tshuam rau qhov kawg sib koom ua ke, thiab nws yooj yim heev rau tawg thaum lub sij hawm ntub dej. Kev ntsuam xyuas tau pom tias phab ntsa lossis qab nthab nrog qhov ntev ntawm 10 meters yuav muaj 20-25mm dav kab nrib pleb thaum ntsib qhov o ntawm ntau tshaj 0.20%.

Txoj kev los tiv thaiv cracking:

1. Kev tiv thaiv kev sib tsoo: khi xaus nrog cov hlau xaim ntawm cov ntoo qhuav, siv cov nplhaib tiv thaiv kev sib tsoo, cov ntsia hlau sib xyaw ua ke, thiab lwm yam, siv cov txheej txheem siv tshuab los yuam cov ntoo kom tsis txhob nthuav thiab ntsws, uas tuaj yeem tiv thaiv cov ntoo ntawm kev tawg.

2. Txhim kho txoj kev sawing hauv lumber: ntoo yog anisotropic. Nyob rau hauv tib qhov kub thiab av noo hloov, qhov loj tshaj plaws ntub expansion thiab shrinkage coefficient yog chord kev taw qhia, ua raws li cov radial kev taw qhia, thiab cov longitudinal hloov yog qhov tsawg tshaj plaws, yog li ntawd thaum sawing down, tsim ntau txoj kab uas hla txiav boards kom txo tau tawg. Tshwj xeeb tshaj yog daim ntawv nrog cov tub ntxhais pulp yog qhov ua rau tawg loj heev thaum nws qhuav. Qhov no yog tshwm sim los ntawm qhov sib txawv ntawm radial thiab chordal contraction nyob ze ntawm lub hauv paus pulp. Thaum nws qhuav lawm, nws tuaj yeem txuas mus rau medulla thiab txuas mus ntev. Cov kab nrib pleb no nyuaj los tiv thaiv thaum nws qhuav. Txoj hauv kev zoo tshaj plaws yog kom tsis txhob muaj cov nplooj ntawv nrog pith cores ("lub plawv txiav") thaum lub sij hawm ua ntoo.

3. Siv cov txheej txheem dej tsis zoo: Siv cov txheej txheem dej tsis zoo ntawm qhov kawg thiab saum npoo ntawm cov ntoo kom qeeb cov evaporation siv ntawm cov ntoo saum npoo, uas tuaj yeem txo cov dej noo gradient sab hauv thiab sab nraud ntawm cov ntoo, thiab kuj txo qhov tawg ntawm cov ntoo.

4. Kev kho kub zoo: Cov txheej txheem los txo cov kab nrib pleb hauv cov ntoo tuaj yeem kho tau zoo ntawm qhov kub thiab txias. Qhov seem deformation ntawm qhov saum npoo ntawm cov ntoo uas tsim cov kab nrib pleb sab hauv tuaj yeem raug tshem tawm los ntawm qhov kub thiab txias thiab cov av noo kho ua ntej kawg ntawm cov txheej txheem ziab. Thaum lub sij hawm ua, txheej txheej ntawm cov ntoo tsim compressive residual deformation vim humidification thiab expansion, uas yog offset los ntawm tus thawj tensile residual deformation. Tom qab kev kho mob, cov dej ntau dhau yog evaporated thiab shrinks nrog txheej txheej ntawm ntoo, yog li tsis muaj residual deformation nyob rau hauv ntoo. Cov tawg kuj raug tshem tawm.

5. Kev kho dej nrog cov dej tsis zoo: Ib txoj hauv kev zoo dua yog kev kho mob nrog cov dej tsis zoo, kom cov dej tsis zoo tuaj yeem nkag mus tob rau hauv cov ntoo kom ua tiav qhov ntev thiab zoo tiv thaiv kev tawg.

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