Plywood yog ib yam ntawm cov txiv neej ua ntoo board uas yog reassembled los ntawm tev.
Plywood yog tsim los ntawm kev txiav mus rau hauv loj-thaj chaw veneers nyob rau hauv cov kev taw qhia ntawm txhua xyoo rings. Tom qab ziab thiab sib txuas, nws yog tsim raws li tus qauv ntawm ntsug mahogany grain orientation ntawm veneers uas nyob ib sab.
Tus naj npawb ntawm cov boards feem ntau yog ib qho khib ntawm cov khaubncaws sab nraud povtseg, feem ntau yog peb mus rau kaum peb txheej, thiab cov txheej txheem feem ntau yog peb txheej, tsib txheej, cuaj txheej, thiab 13 txheej (kev muag khoom feem ntau hu ua peb plywood, tsib. plywood, cuaj plywood, kaum peb centimeters). Lub veneer pem hauv ntej ntawm txheej txheej sab nraud yog hu ua pem hauv ntej vaj huam sib luag, sab nraub qaum yog hu ua lub vaj huam sib luag sab hauv, thiab txheej sab hauv yog hu ua core board.
Hom 1 plywood muaj qhov zoo ntawm huab cua tsis kam, dej kub tsis kam, ua haujlwm ntev, kub tsis kam, thiab ua haujlwm tsis zoo.
Cov 2 hom plywood no yog cov plywood waterproof, uas tuaj yeem ntub dej txias thiab dej kub hauv lub sijhawm luv luv.
Hom 3 plywood yog waterproof plywood, uas tuaj yeem muab tso rau hauv dej txias rau lub sijhawm luv luv, uas tsim nyog rau qhov kub thiab txias hauv chav tsev. Cov rooj tog zaum thiab kev tsim kho dav dav;
Hom 4 plywood yog noo-resistant plywood, uas yog feem ntau siv sab hauv tsev. Feem ntau siv plywood suav nrog birch, eucalyptus, thiab poplar.
Plywood feem ntau yog siv rau sab nraum zoov, xws li lub tsev kho kom zoo nkauj sab nrauv thiab pob zeb formwork. Hauv kev kho kom zoo nkauj, nws tsuas yog siv rau hauv qab nthab, phab ntsa tiab, thiab hauv pem teb liner.
Lub hauv paus muaj pes tsawg leeg ntawm plywood
Txhawm rau txhim kho anisotropy ntawm ntuj ntoo kom ntau li ntau tau, plywood muaj cov yam ntxwv zoo ib yam thiab ruaj khov. Feem ntau, plywood yuav tsum ua raws li ob lub hauv paus ntsiab lus hauv cov qauv: ib qho yog symmetrical; Lwm qhov yog tias ib leeg-board optical fibers nyob ib sab yog perpendicular rau ib leeg.
Lub hauv paus ntsiab lus ntawm symmetry yog tias plywood yuav tsum tau nyob rau ntawm ob sab ntawm lub dav hlau nruab nrab ntawm symmetry ntawm lub plywood, tsis hais qhov xwm ntawm cov ntoo, lub thickness ntawm lub plywood, tus naj npawb ntawm txheej, cov kev taw qhia ntawm fiber, thiab cov av noo. cov ntsiab lus yuav tsum symmetrical rau ib leeg.
Nyob rau hauv tib lub plywood, ib tsob ntoo thiab veneers ntawm thickness yuav siv tau, los yog veneers ntawm txawv ntoo hom thiab thicknesses yuav siv tau; Txawm li cas los xij, ob txheej ntawm kev sib koom ua ke symmetrical veneer ntoo thiab thicknesses ntawm ob sab ntawm lub symmetry center dav hlau yog tib yam.
Txhawm rau ua kom cov qauv ntawm cov plywood ua tau raws li cov ntsiab lus saum toj no, tus naj npawb ntawm cov txheej yuav tsum khib.
Yog li ntawd, plywood feem ntau muab faib ua peb txheej, tsib txheej, xya txheej thiab lwm yam khib nyiab.
Lub npe ntawm cov plywood txheej yog: nto veneer hu ua lub rooj, lub puab veneer yog hu ua core board; lub vaj huam sib luag pem hauv ntej hu ua vaj huam sib luag, thiab lub vaj huam sib luag tom qab hu ua lub vaj huam sib luag tom qab; nyob rau hauv lub core board, cov kev taw qhia fiber ntau yog parallel rau lub vaj huam sib luag.
Nws yog hu ua long core board los yog mid-board.
Qhov zoo ntawm plywood
Qhov zoo ntawm plywood yog muaj zog bearing muaj peev xwm, tsis yooj yim rau deform thiab khoov, tsis yooj yim rau tawg, thiab me me expansion. Multilayer board muaj lub peev xwm zoo hloov mus rau sab hauv tsev kub thiab av noo. Cov txheej saum npoo ntawm multilayer board yog ntuj ntoo. Ntoo grain yog ze rau cov xwm thiab cov hom yog loj. Qhov zoo ntawm ntau txheej boards yog yooj yim rau pave. Piv nrog rau cov ntoo ntoo, ntau txheej pawg thawj coj zam qee qhov tsis xws luag ntawm ntuj ntoo, xws li stuttering, dav, deformation, thiab tsis zoo compression kuj.
Multi-layer boards kuj muaj qhov zoo dua li cov ntoo ntuj hauv nqe. Txij li cov txheej txheem ntau txheej rov txheeb xyuas thiab rov tsim cov cav, lawv muaj kev lag luam ntau dua li cov khoom siv ntoo kim kim.
Disadvantages ntawm multilayer board
Lub rooj tsavxwm ntau txheej yog ua los ntawm ntuj ntoo core board los ntawm kev kub siab thiab kev kub siab nias hauv kub xovxwm nrog cov nplaum. Yog li ntawd, nyob rau hauv cov nqe lus ntawm kev tiv thaiv ib puag ncig, yuav muaj ib co formaldehyde tso. Tab sis nws yog ze tshaj plaws rau cov ntoo ntuj thiab tseem yog cov khoom siv hluav taws xob zoo tshaj plaws rau cov khoom vaj khoom tsev.
Kev txheeb xyuas cov plywood zoo lossis phem
Ua ntej, saib qhov flatness ntawm lub vaj huam sib luag. Los ntawm qhov no, peb tuaj yeem pom cov khoom siv sab hauv ntawm lub rooj tsavxwm. Thaum peb saib ntawm lub rooj tsavxwm, peb tuaj yeem kov nws nrog peb txhais tes thiab xav tias puas muaj qhov tsis sib xws. Yog tias muaj, nws txhais tau hais tias qhov chaw sanding tsis zoo.
Txawm li cas los xij nws txhais tau tias cov khoom siv tseem ceeb ntawm lub rooj tsavxwm tsis zoo thiab cov khoom siv kuj tawg. Hauv luv, nws tsis pom zoo kom yuav qhov tsis sib xws.
Qhov thib ob, saib xyuas qhov kev nkag siab ntawm hierarchy ntawm lub rooj tsavxwm multilayer. Lub thicker lub rooj tsavxwm, qhov yooj yim dua yog pom cov txheej txheej ntawm ntau txheej board. Yog tias txhua txheej yog ua los ntawm cov khoom siv monolithic, cov khaubncaws sab nraud povtseg yuav pom tseeb heev thiab yuav tsis muaj qhov tshwm sim ntawm cov txheej txheem. Yog tias cov khoom tsis zoo, muaj ntau cov khoom seem.
Vim yog cov nyhuv ntawm qhov siab, qib yuav dhau los zuj zus tom qab sib sib zog nqus.
Post lub sij hawm: Dec-02-2020