Cov ntaub ntawv dab tsi yog plywood
Plywood yog cov khoom siv ntoo. Hauv cov txheej txheem tsim khoom, cov khoom loj yog thawj zaug txiav rau hauv ib tus neeg ib leeg, thiab tom qab ntawd glued ua ke. Nyob ntawm qhov tuab, tus naj npawb ntawm cov txheej ntawm plywood tau teem rau peb, qee qhov tuaj yeem ncav cuag li kaum txheej. Feem ntau hais lus, nws yog stacked raws li khib tus lej los tsim cov khaubncaws sab nraud povtseg nyob ib puag ncig hauv lub xeev ntsug, thiab lub cev lub cev ntawm hom plywood no kuj ruaj khov.
Txhawm rau kom ntseeg tau tias cov qauv ntawm plywood ua raws li ob qho tib si ntawm cov ntsiab lus saum toj no, nws cov txheej txheem yuav tsum yog khib. Yog li plywood feem ntau yog ua rau hauv khib khaubncaws sab nraud povtseg xws li peb, tsib, xya, thiab lwm yam. Cov npe ntawm txhua txheej ntawm plywood yog: nto veneer hu ua nto board, thiab puab veneer yog hu ua core board; Lub vaj huam sib luag pem hauv ntej yog hu ua vaj huam sib luag, thiab lub vaj huam sib luag tom qab yog hu ua vaj huam sib luag tom qab; Nyob rau hauv lub core board, cov kev taw qhia fiber ntau sib npaug zos rau saum npoo yog hu ua ib tug ntev core board los yog nruab nrab board. Thaum tsim cov kab noj hniav slab slab, lub vaj huam sib luag thiab lub vaj huam sib luag rov qab yuav tsum fim sab nraud nruj.
Cov yam ntxwv ntawm plywood:
1. Cov khoom siv no muaj lub zog muaj zog thiab tsis yooj yim rau deformation lossis expansion thiab contraction vim ib puag ncig yam. Nws tsis tshua muaj kev tawg thaum ntsia tom qab.
2. Plywood belongs rau ib hom khoom siv board, yog li thaum teeb tsa, nws qhov loj me txawv thiab tuaj yeem hloov kho raws li qhov xav tau. Thaum lub sij hawm tsim cov txheej txheem, qhov kev siv ntawm cov ntoo tseem yog qhov siab, uas tuaj yeem txuag tau cov ntoo siv.
3. Plywood muaj qee qhov ntsuas kub tsis kam thiab tsis cuam tshuam rau hauv qhov chaw kub, nrog rau lub neej ua haujlwm ntev.
4. Peb tsis tuaj yeem tsis quav ntsej txog qhov tsis zoo ntawm cov plywood hom no, xws li qhov tseeb tias qhov saum npoo tsis tshwj xeeb yog du thiab txawm. Yog tias koj xav ua ib lub txee rau lub txee, sim tsis txhob siv hom plywood no.
