Plywood yog peb-txheej los yog ntau-txheej board-zoo li cov khoom uas yog ua los ntawm cov ntoo seem uas yog tev rau hauv veneers los yog hlais rau hauv nyias ntoo, thiab ces glued nrog adhesives.Feem ntau, cov veneers khib nyiab yog siv, thiab cov khaubncaws sab nraud povtseg ntawm veneers yog siv.Cov lus qhia fiber ntau yog glued perpendicular rau ib leeg.
Plywood yog ib qho ntawm cov khoom siv feem ntau siv rau cov rooj tog zaum, thiab nws yog ib qho ntawm peb lub rooj loj loj ntawm cov ntoo ua vaj huam sib luag.Nws tseem tuaj yeem siv rau hauv dav hlau, nkoj, tsheb ciav hlau, tsheb, tsev thiab lub thawv ntim khoom.Ib pawg ntawm cov veneers feem ntau yog sib sau ua ke thiab ua ke ua ke raws li cov kev taw qhia ntawm cov ntoo grain ntawm cov khaubncaws sab nraud povtseg perpendicular rau ib leeg.Feem ntau, lub rooj tsavxwm nto thiab sab hauv txheej pawg thawj coj yog symmetrically teem rau ntawm ob sab ntawm nruab nrab txheej los yog cov tub ntxhais.Lub slab ua los ntawm cov veneer tom qab gluing yog criss-crossed raws li cov kev taw qhia ntawm ntoo grain, thiab nias nyob rau hauv cua sov los yog tsis-cua sov tej yam kev mob.Tus naj npawb ntawm cov khaubncaws sab nraud povtseg feem ntau yog tus lej khib, thiab ob peb muaj tus lej.Qhov sib txawv ntawm lub cev thiab cov khoom siv kho tshuab hauv cov lus qhia ntsug thiab kab rov tav yog me me.Feem ntau siv cov plywood yog peb-ply board, tsib-ply board thiab hais txog.Plywood tuaj yeem txhim kho kev siv ntoo thiab yog ib txoj hauv kev loj kom txuag tau ntoo.
Txhawm rau txhim kho cov khoom anisotropic ntawm ntuj ntoo kom ntau li ntau tau, kom cov khoom ntawm plywood zoo ib yam thiab cov duab ruaj khov, cov qauv ntawm cov plywood yuav tsum ua raws li ob lub hauv paus ntsiab lus: ib qho yog symmetry;Lwm qhov yog tias cov fibers ntawm cov khaubncaws sab nraud povtseg ntawm veneer yog perpendicular rau ib leeg.Lub hauv paus ntsiab lus ntawm symmetry yog xav kom cov veneers ntawm ob sab ntawm lub symmetrical central 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, cov kev taw qhia ntawm cov ntoo. fibers, thiab noo noo cov ntsiab lus.Nyob rau hauv tib lub plywood, veneers ntawm ib hom thiab tuab yuav siv tau, los yog veneers ntawm ntau hom thiab tuab yuav siv tau;Txawm li cas los xij, ob txheej txheej ntawm veneers uas sib npaug rau ib leeg ntawm ob sab ntawm lub dav hlau symmetrical hauv nruab nrab yuav tsum muaj tib hom thiab tuab.Lub ntsej muag thiab sab nraub qaum tsis raug tso cai los ntawm tib hom ntoo.
Ua kom cov qauv ntawm plywood ua tau raws li cov ntsiab lus saum toj no ob lub hauv paus tib lub sijhawm, nws cov txheej txheem yuav tsum khib.Yog li ntawd, plywood feem ntau yog ua rau hauv khib-ntaus txheej xws li peb txheej, tsib txheej, thiab xya txheej.Cov npe ntawm txhua txheej ntawm plywood yog: lub veneer nto yog hu ua lub rooj tsavxwm nto, sab hauv veneer hu ua core board;lub rooj tsavxwm pem hauv ntej yog hu ua lub vaj huam sib luag, thiab lub rooj tsavxwm sab nraub qaum yog hu ua pawg thawj coj saib;nyob rau hauv lub core board, cov kev taw qhia fiber ntau yog parallel mus rau lub board Nws yog hu ua ntev core board los yog nruab nrab board.Thaum tsim kab noj hniav slabs, pem hauv ntej thiab nram qab panels yuav tsum fim nruj nreem rau sab nraud.
Post lub sij hawm: Feb-15-2023