【膠合板(ban)(ban)(ban)(ban)熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)機(ji)(ji)廠家介紹】纖(xian)維(wei)板(ban)(ban)(ban)(ban)多層(ceng)熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)機(ji)(ji)的(de)(de)(de)(de)(de)(de)介紹，我國纖(xian)維(wei)板(ban)(ban)(ban)(ban)生(sheng)(sheng)產(chan)(chan)已相當(dang)普遍,主(zhu)要(yao)產(chan)(chan)品多數是(shi)(shi)濕(shi)(shi)法(fa)生(sheng)(sheng)產(chan)(chan)的(de)(de)(de)(de)(de)(de)硬(ying)質(zhi)(zhi)(zhi)纖(xian)維(wei)板(ban)(ban)(ban)(ban)。干(gan)法(fa)、半(ban)干(gan)法(fa)生(sheng)(sheng)產(chan)(chan)硬(ying)質(zhi)(zhi)(zhi)纖(xian)維(wei)板(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)(de)廠家為(wei)(wei)數不多,而(er)生(sheng)(sheng)產(chan)(chan)軟質(zhi)(zhi)(zhi)纖(xian)維(wei)板(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)(de)單位則更少(shao)。下(xia)(xia)(xia)面(mian)(mian)分(fen)別針(zhen)對(dui)不同的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)產(chan)(chan)方法(fa),從(cong)工藝角度(du)闡述各種熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)機(ji)(ji)的(de)(de)(de)(de)(de)(de)特(te)點(dian)(dian)。(1)濕(shi)(shi)法(fa)成(cheng)型纖(xian)維(wei)板(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)(de)工藝特(te)點(dian)(dian)及(ji)熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)機(ji)(ji)特(te)點(dian)(dian)濕(shi)(shi)法(fa)成(cheng)型制造的(de)(de)(de)(de)(de)(de)主(zhu)要(yao)是(shi)(shi)硬(ying)質(zhi)(zhi)(zhi)纖(xian)維(wei)板(ban)(ban)(ban)(ban)(即(ji)(ji)容(rong)積(ji)重在(zai)0.8g/cm以上),但也有個別廠家以此生(sheng)(sheng)產(chan)(chan)軟質(zhi)(zhi)(zhi)纖(xian)維(wei)板(ban)(ban)(ban)(ban)的(de)(de)(de)(de)(de)(de)(容(rong)積(ji)重在(zai)0.4g/cm3左(zuo)(zuo)右(you))。熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)(de)(de)作(zuo)(zuo)用(yong)主(zhu)要(yao)是(shi)(shi)使(shi)板(ban)(ban)(ban)(ban)坯(pi)(pi)(pi)在(zai)高(gao)壓(ya)(ya)(ya)(ya)(ya)作(zuo)(zuo)用(yong)下(xia)(xia)(xia)壓(ya)(ya)(ya)(ya)(ya)縮致密(mi),同時(shi)(shi)使(shi)板(ban)(ban)(ban)(ban)坯(pi)(pi)(pi)中的(de)(de)(de)(de)(de)(de)木(mu)素在(zai)高(gao)溫(wen)作(zuo)(zuo)用(yong)下(xia)(xia)(xia)塑化,成(cheng)一整體。對(dui)用(yong)濕(shi)(shi)法(fa)成(cheng)型的(de)(de)(de)(de)(de)(de)纖(xian)維(wei)板(ban)(ban)(ban)(ban)來(lai)說(shuo),熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)過程中的(de)(de)(de)(de)(de)(de)最(zui)大(da)特(te)點(dian)(dian),就是(shi)(shi)大(da)量(liang)地(di)排(pai)水(shui)(shui)。一般濕(shi)(shi)坯(pi)(pi)(pi)的(de)(de)(de)(de)(de)(de)含(han)水(shui)(shui)率為(wei)(wei)65-75%,當(dang)熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)機(ji)(ji)閉合,熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)板(ban)(ban)(ban)(ban)接觸(chu)板(ban)(ban)(ban)(ban)坯(pi)(pi)(pi)時(shi)(shi),水(shui)(shui)分(fen)即(ji)(ji)開始被壓(ya)(ya)(ya)(ya)(ya)榨出來(lai)。到(dao)壓(ya)(ya)(ya)(ya)(ya)力(li)(li)升至(zhi)(zhi)5-6kgf/cm后,保持(chi)20-25這(zhe)(zhe)階(jie)段(duan)(duan),濕(shi)(shi)坯(pi)(pi)(pi)主(zhu)要(yao)靠機(ji)(ji)械壓(ya)(ya)(ya)(ya)(ya)力(li)(li)作(zuo)(zuo)用(yong)排(pai)出大(da)量(liang)水(shui)(shui)分(fen),含(han)水(shui)(shui)率降(jiang)到(dao)20-30%左(zuo)(zuo)右(you),內部溫(wen)度(du)迅(xun)速升到(dao)100℃左(zuo)(zuo)右(you)。然后壓(ya)(ya)(ya)(ya)(ya)力(li)(li)下(xia)(xia)(xia)降(jiang),在(zai)保持(chi)板(ban)(ban)(ban)(ban)面(mian)(mian)壓(ya)(ya)(ya)(ya)(ya)力(li)(li)為(wei)(wei)10kgf/cm2左(zuo)(zuo)右(you)的(de)(de)(de)(de)(de)(de)狀態下(xia)(xia)(xia),靠熱(re)(re)飯加熱(re)(re)作(zuo)(zuo)用(yong)把剩余(yu)水(shui)(shui)分(fen)蒸(zheng)發出來(lai)。這(zhe)(zhe)段(duan)(duan)時(shi)(shi)間(jian)的(de)(de)(de)(de)(de)(de)結束,以板(ban)(ban)(ban)(ban)坯(pi)(pi)(pi)含(han)水(shui)(shui)率達到(dao)10%左(zuo)(zuo)右(you)時(shi)(shi)為(wei)(wei)準。以后壓(ya)(ya)(ya)(ya)(ya)力(li)(li)再(zai)次上升至(zhi)(zhi)55-65kgf/cm2,使(shi)板(ban)(ban)(ban)(ban)坯(pi)(pi)(pi)在(zai)高(gao)溫(wen)高(gao)壓(ya)(ya)(ya)(ya)(ya)下(xia)(xia)(xia)干(gan)燥塑化,從(cong)而(er)完成(cheng)熱(re)(re)壓(ya)(ya)(ya)(ya)(ya)。