Kub nias yog txheej txheem tseem ceeb hauv particleboard ntau lawm. Nws txoj haujlwm yog ua kom cov kua nplaum nyob hauv lub slab thiab pressurize lub xoob slab.
Consolidated rau hauv daim ntawv ntawm cov thickness. Nws cov txheej txheem yuav tsum yog:
① Tsim nyog cov dej noo. Thaum cov av noo noo yog 18 ~ 20%, nws yog qhov zoo los txhim kho lub zog flexural, tensile zog thiab nto tiav.
Txo qhov muaj peev xwm ntawm slab bubbling thiab delamination thaum lub zog nyem. Cov ntsiab lus noo noo ntawm cov tub ntxhais txheej yuav tsum tsim nyog qis dua qhov txheej txheej saum npoo kom tswj tau lub dav hlau tensile lub zog.
② Tsim nyog kub nias siab. Lub siab tuaj yeem cuam tshuam rau thaj tsam ntawm cov shavings, daim ntawv thickness sib txawv thiab qib ntawm cov kua nplaum hloov ntawm cov shavings.
Raws li qhov sib txawv qhov xav tau ntawm cov khoom, qhov kub nias siab feem ntau yog 1.2 ~ 1.4 MPa.
③ Tsim nyog qhov kub thiab txias. Qhov kub ntau dhau yuav tsis tsuas yog decompose cov urea-formaldehyde resin xwb, tab sis kuj ua rau cov slab rau ib nrab solidify ua ntej thaum kub nce, ua rau pov tseg.
④ Tsim nyog lub sij hawm pressurization. Yog hais tias lub sij hawm luv luv, cov txheej txheem nruab nrab ntawm cov resin yuav tsis kho tag nrho, thiab cov elastic rov qab ntawm cov khoom tiav hauv cov thickness kev taw qhia yuav nce.
Lub dav hlau tensile lub zog yog txo qis. Qhov kub-pressed particleboard yuav tsum tau mus rau lub sijhawm ntawm kev tswj cov av noo kom coj cov ntsiab lus noo noo mus rau lub xeev sib npaug.
Tom qab sawing thiab xuab zeb, tshuaj xyuas thiab pob. Txawm li cas los xij, kub stacking tsis pub tom qab lub siab nyem, txwv tsis pub lub brittleness ntawm daim hlau yuav nce.
Moulding technology yog hais txog cov thev naus laus zis uas tsim cov khoom hauv ib qho kev ua haujlwm. Muaj peb txoj kev paub tab. Kub molding yuav siv tsawg los yog tsis muaj kua nplaum.
Nws tso siab rau qhov ua kom thiab ntws ntawm lignin nyob rau hauv lub kaw kub pwm los ua cov kua nplaum, tab sis nws yuav tsum tau txias rau demould, uas siv cov cua sov ntau thiab muaj cov khoom tsim tau tsawg.
Maj mam theem tawm. Txoj kev tsim lub thawv siv cov xovxwm tshwj xeeb los nias cov khoom, thiab tom qab ntawd nias nws ib zaug los ua cov khoom, uas yog siv los ua cov thawv ntim khoom.
Txhawm rau tsim cov khoom siv rooj tog, khoom siv kho kom zoo nkauj sab hauv, pallets thiab lwm yam khoom siv, cov nplaum feem ntau yog urea-formaldehyde resin, thiab qhov chaw ntawm cov khoom yog ua los ntawm veneer lossis ntoo.
Roj impregnated ntawv yog pasted thiab molded nyob rau hauv ib kauj ruam. Tsis tas li ntawd, tseem muaj cov pwm siv rau ntawm qhov chaw ntawm particleboard uas tau ua, los yog tsim cov slab uas tsis tau kub-nias.
Lub phaj yog nias los tsim ib txoj kev tiaj tus molding nrog cov qauv nyem, thiab lwm yam.
