桤木旋切单板以及用于制造细木工板的工艺研究

通过设置不同的旋切厚度对不同树龄的桤木原木进行单板旋切试验,分析单板厚度和背面裂隙率,探讨桤木单板旋切的适应性和制造细木工板的工艺,并采用正交法优选最佳制造细木工板的热压工艺参数。结果表明:当杉木板芯厚度为12 mm、桤木单板厚度为2.8 mm时,热压温度为125℃、热压压力为1.3 MPa、热压时间为8 min、施胶量为220 g/m~2时,横向静曲强度最大。

Technology of rotary cut Alnus crematogyne veneer and manufacturing blockboard

Setting up the experiments by cutting the Alnus crematogyne Burk.logs at varied age with different rotary thick-ness,the measured veneer thickness and crack rate of the veneer back were analyzed to discuss the adaptability of the Al-nus crematogyne rotary veneer and its technology of manufacturing blockboard. Also,the optimal hot pressing technologi-cal parameters of manufacturing blockboard were selected by the orthogonal test. The results showed that with thickness 12 mm of Chinese fir core,thickness 2.8 mm of Alnus crematogyne rotary veneer,the optimal parameters were 125 ℃for hot pressing temperature,1.3 MPa for pressure ,8 minutes for the hot pressing time,220 g/m2 for adhensive amount,and the bending strength across grain had the best value.