Plywood Production Methods thiab cov txheej txheem tseem ceeb

Qhov zoo thiab kev ua tau zoo ntawm plywood hauv paus yog nyob ntawm qhov kev tshawb fawb thiab nruj ntawm nws txoj kev tsim khoom. Raws li ib txwm laminated composite khoom, plywood manufacturing integrates txheej txheem xws li raw khoom ua, veneer npaj, gluing thiab sib dhos, kub nias thiab curing, thiab post- ua. Cov txheej txheem tsis thiab kev ua haujlwm tshwj xeeb ntawm txhua theem sib sau ua ke txiav txim siab qhov ruaj khov thiab tsim nyog ntawm cov khoom tiav.
Raw khoom npaj yog qhov pib ntawm txoj kev system. High-plywood zoo feem ntau siv cov ntaub ntawv raw cov ntaub ntawv nrog cov qauv zoo nkauj thiab cov nplej ncaj, tau los ntawm cov ntoo tawv thiab cov ntoo mos, los yog kev sib xyaw ua ke ntawm ob qho tib si los txhim kho kev ua haujlwm thiab tus nqi- ua tau zoo. Cov ntaub ntawv raw yuav tsum tau ua nruj me ntsis cais, tshem tawm cov rotten, kab - puas, thiab tawg qhov chaw hnyav, thiab qhuav raws li cov qauv ntawm cov dej noo, feem ntau tswj ntawm 8% -12%, tiv thaiv kev deformation thiab kev sib txuas tsis zoo thaum ua haujlwm tom ntej.
Kev npaj veneer vam khom rau kev txiav, txiav, lossis sawing txheej txheem. Rotary txiav yog qhov ua tau zoo thiab tuaj yeem tau txais cov veneers ntev ntev, haum rau loj - teev ntau lawm; slicing tuaj yeem nthuav tawm textures zoo nkauj thiab feem ntau siv rau kev kho kom zoo nkauj saum npoo. Veneer thickness nyob ntawm cov khoom tiav lawm, feem ntau ntawm 0.5 thiab 3 millimeters, thiab yuav tsum tau shearing thiab trimming los xyuas kom meej qhov ntev thiab ncaj npoo.
Lub gluing thiab cov theem sib dhos ncaj qha cuam tshuam rau interlayer bonding zog. Phenolic resin, urea-formaldehyde resin, los yog lwm yam adhesives tus phooj ywg ib puag ncig raug xaiv raws li daim ntawv thov. Daim ntawv thov yuav tsum tsis tu ncua thiab tswj kom muaj nuj nqis, tsis txhob muaj kua nplaum txaus lossis ntau dhau. Thaum lub sij hawm sib dhos, nws yog ib qho tsim nyog los xyuas kom meej tias cov lus qhia fiber ntau ntawm cov veneers uas nyob ib sab yog perpendicular lossis kwv yees li ntawm cov txheej txheem, thiab tswj cov txheej txheem khib nyiab hauv kev sib xyaw ua ke los tsim cov qauv sib npaug thiab txo qhov kev pheej hmoo ntawm warping.
Kub nias thiab kho yog cov kauj ruam tseem ceeb uas txiav txim siab qhov kev ua tau zoo ntawm lub rooj tsavxwm. Los ntawm kev tswj qhov kub thiab txias, siab, thiab lub sijhawm, cov nplaum txheej yog hla tag nrho - txuas los ua ib qho kev sib xyaw ruaj khov. Kev kub siab tuaj yeem ua kom cov tshuaj tiv thaiv curing, siab ua kom muaj kev sib raug zoo ntawm cov nplaum txheej thiab cov ntoo saum npoo, thiab lub sij hawm xav tau kom sib npaug ntawm cov℃ntawm kev kho thiab kev ua haujlwm ntau lawm. Ntau hom adhesives thiab board thicknesses sib haum rau cov txheej txheem sib txawv ntawm qhov rais, uas yuav tsum tau teem kom meej los tiv thaiv delamination los yog tsis tiav curing.
Tom qab- kev ua tiav suav nrog kev txiav ntug, xuab zeb, kho qhov chaw, thiab tshuaj xyuas kom zoo. Ntug trimming xyuas kom cov laug cam yog square thiab precisely me me, sanding txhim kho nto flatness thiab smoothness, thiab cov txheej txheem kho tshem tawm qhov muag tsis pom kev. Kev soj ntsuam zoo suav nrog kev sib txuas ntawm lub zog, formaldehyde emission, cov ntsiab lus noo noo, thiab cov cim qhia pom, ua kom cov khoom ua tau raws li cov qauv qib sib xws.
Kev tsim cov plywood yog cov txheej txheem engineering uas tau coj los ntawm cov txheej txheem ntawm cov txheej txheem thiab ua haujlwm rau kev tswj xyuas cov txheej txheem. Tsuas yog ua raws li cov txheej txheem nruj me ntsis ntawm txhua theem- los ntawm cov khoom siv raw thiab kev npaj rau kev sib dhos, kub nias, thiab kev sim- tuaj yeem ua tau siab -plywood zoo nrog kev ua haujlwm ruaj khov thiab kev siv dav dav.