Raw Khoom Rau Ua Particle Board

Cov ntaub ntawv raw rau kev ua particleboard muaj xws li ntoo los yog lignocellulosic cov ntaub ntawv, nplaum thiab additives, tus qub accounting rau ntau tshaj 90 feem pua ​​ntawm qhuav qhov hnyav ntawm lub rooj tsavxwm. Ntoo raw cov ntaub ntawv feem ntau tau los ntawm kev sib tshuam hav zoov, cov ntoo me me (feem ntau hauv qab 8 cm inch), txiav cov seem thiab cov khoom siv ntoo. Ua tiav rau hauv flakes, strips, koob, granular wood chips, shavings, wood wool, sawdust, thiab lwm yam, hu ua seem. Tsis tas li ntawd, cov ntaub ntawv uas tsis yog ntoo xws li cog stems thiab noob plhaub tuaj yeem ua rau hauv cov laug cam, uas feem ntau muaj npe tom qab cov ntaub ntawv siv, xws li hemp stalk (particle) board, bagasse (particle board), thiab lwm yam. Adhesives feem ntau urea-formaldehyde resin kua nplaum thiab phenolic resin kua nplaum. Cov qub muaj lub teeb xim thiab tsis kub curing, thiab muaj ib tug zoo gluing nyhuv ntawm particleboards ntawm ntau yam ntaub ntawv cog xws li nplej straw thiab mov husk. Qhov kub nias kub yog 195-210 degree . Nws yog siv dav hauv kev tsim khoom, tab sis muaj qhov tsis zoo ntawm kev tso tawm dawb formaldehyde los ua paug rau ib puag ncig. Cov duab ntawm cov shavings yog qhov txiav txim siab rau qhov zoo ntawm particleboard, yog li nws yog thawj zaug tsim nyog los tsim cov shavings tsim nyog. Cov khoom seem seem ntawm kev ua ntoo tuaj yeem rov ua dua los siv ua cov txheej txheem tseem ceeb rau particleboard. Cov shavings saum npoo yog tsim los ntawm kev ua haujlwm tshwj xeeb ntawm cov khoom siv qib siab (ntoo truncated, board edges, thiab lwm yam) hauv kev sau lossis ua. Qhov ntev, tuab thiab dav ntawm shavings sib txawv raws li txoj kev tsim khoom thiab cov tub ntxhais lossis txheej txheej siv los ua lawv. Cov khoom siv rau kev npaj shavings muaj xws li chippers, re-shredders, grinders thiab fiber separators, thiab txoj kev txiav muaj xws li txiav, txiav thiab crushing. Txhawm rau kom tau txais cov shavings zoo, nws yuav tsum dhau los ntawm cov txheej txheem ntawm thawj crushing, sib tsoo, rov ua dua thiab tshuaj ntsuam. Cov txheej txheem shavings muaj qhov pib ya raws ntawm kwv yees li 40-60 feem pua ​​​​, thiab cov dej noo ntawm cov txheej txheem tseem ceeb uas ua tau raws li cov txheej txheem thev naus laus zis yog 2-4 feem pua, thiab txheej txheej saum npoo yog 5-9 feem pua. Yog li ntawd, cov shavings nrog sib txawv thawj cov ntsiab lus noo noo yuav tsum tau qhuav nrog lub tshuab ziab khaub ncaws kom ua tiav cov ntsiab lus noo noo kawg. Cov shavings qhuav yog ces tov nrog kua kua nplaum thiab additives. Feem ntau, 8 mus rau 12 grams ntawm qhov loj me yog siv rau ib square meter ntawm thaj tsam ntawm cov shavings. Cov khoom sizing yog txau los ntawm lub nozzle rau hauv cov kab uas muaj ib txoj kab uas hla ntawm 8-35 microns, tsim ib tug nyias nyias thiab niaj hnub nplaum txheej nyob rau saum npoo ntawm cov shavings. Cov shavings tom qab sizing yog ces paved rau hauv slabs uas thickness feem ntau yog 10 mus rau 20 npaug ntawm cov thickness ntawm cov khoom tiav. Pre-pressing thiab kub-nias yog muaj. Lub siab ua ntej compression yog 0.