Yuav ua li cas txheeb xyuas qhov zoo ntawm cov khoom siv Plywood
Niaj hnub no, plywood yog peb-txheej los yog ntau-txheej phaj cov khoom ua los ntawm tev ntoo ntu rau hauv veneers los yog npaj ntoo blocks rau hauv nyias ntoo, thiab ces gluing lawv nrog adhesives. Feem ntau, cov veneers khib nyiab yog siv, thiab cov lus qhia fiber ntau ntawm cov veneers uas nyob ib sab yog glued ua ke hauv txoj kab ncaj nraim.
Txhawm rau txhim kho cov khoom anisotropic ntawm ntuj ntoo kom ntau li ntau tau, ua kom cov khoom plywood zoo ib yam thiab cov duab ruaj khov, plywood feem ntau ua raws qee cov ntsiab lus thiab cov ntsiab lus tseem ceeb hauv cov qauv. Ib qho yog symmetry, thiab lwm qhov yog tias cov fibers ntawm cov veneers uas nyob ib sab yog ncaj. Lub hauv paus ntsiab lus ntawm symmetry yuav tsum tau hais tias cov veneers ntawm ob kawg ntawm lub symmetry centre dav hlau ntawm lub plywood yuav tsum symmetrical rau ib leeg tsis hais qhov xwm ntawm cov ntoo, lub thickness ntawm lub veneer, tus naj npawb ntawm cov khaubncaws sab nraud povtseg, fiber kev taw qhia, noo noo. cov ntsiab lus, thiab lwm yam. Nyob rau hauv tib lub plywood, veneers ntawm ib tsob ntoo ib hom thiab tuab yuav siv tau, los yog veneers ntawm txawv ntoo hom thiab thicknesses yuav siv tau, tab sis ob txheej ntawm symmetric veneers ntawm ob kawg ntawm lub symmetry center dav hlau yuav tsum tau. ntawm tib hom ntoo thiab tuab, thiab lub ntsej muag thiab sab nraub qaum yog tso cai rau cov ntoo sib txawv.
Plywood manufacturers paub tias plywood yog ib qho khoom siv hauv tsev thiab kho kom zoo nkauj hauv peb lub neej, tab sis muaj ntau yam khoom muag hauv khw. Yog tias peb xav siv cov khoom tsim nyog, peb kuj yuav tsum paub qhov txawv ntawm cov khoom zoo. Txhawm rau kom cov qauv ntawm plywood kom tau raws li cov ntsiab lus saum toj no, nws cov txheej txheem yuav tsum yog tus lej khib, yog li plywood feem ntau ua rau peb txheej, tsib txheej, xya txheej thiab lwm yam khib nyiab. Lub veneer nto yog hu ua lub rooj tsavxwm saum npoo, sab hauv veneer yog hu ua core board, pem hauv ntej lub rooj tsavxwm yog hu ua pawg thawj coj saib, thiab lub rooj tsavxwm sab hauv yog hu ua lub rooj tsavxwm rov qab. Nyob rau hauv lub core board, cov kev taw qhia fiber ntau yog parallel mus rau saum npoo. Nws yog hu ua long core board los yog nruab nrab board. Thaum tsim cov kab noj hniav board dawb paug, lub vaj huam sib luag board thiab lub nraub qaum yuav tsum sab nraud.