小径柚木异型胶合工艺对集成材胶合性能的影响
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摘要
以胶合压力、施胶量(单面)、加压时间为影响因素,通过正交试验优化小径柚木胶合工艺,在此基础上研究胶合工艺参数、组合纹理与异型单元件斜边角度对集成材胶合性能的影响。结果表明:优化胶合工艺参数为胶合压力0.7 MPa,施胶量(单面)220 g/m~2,加压时间40 min;胶合压力对胶合剪切强度有显著影响,施胶量(单面)和加压时间对胶合性能影响不显著,随着胶合压力增大,胶合剪切强度随之减小。异型单元件斜边角度和不同纹理组合都对胶合剪切强度有显著影响,对木破率无显著影响。随着梯形组坯单元件斜边角度的增加,胶合剪切强度增加。在弦弦、径弦、径径纹理组合中,弦弦组合纹理胶合剪切强度最大。
Taking the bonding pressure, glue amount(single side), pressing time as the influence factors, and through the orthogonal experiment to find the optimized gluing process parameters.On this basis,the effect of gluing process,combined texture and angle of the special-shaped unit on bonding properties of glulam was studied. The results showed that the optimal gluing process parameters of bonding pressure, glue amount(single side) and pressing time were 0.7 MPa, 220 g/m~2,40 min, respectively. The bonding pressure had a significant effect on the gluing shear strength. The glue amount and the pressing time had no significant effect on the bonding properties. As the bonding pressure increased, the gluing shear strength decreased. Different texture combinations and angles of the beveled elements of the special-shaped unit had a significant effect on the shear strength, while had no significant effect on the wood breakage rate. As the angle of the bevel of the trapezoidal unit increased, the gluing shear strength increases. The combination of string and chord texture had the highest shear strength.
Taking the bonding pressure, glue amount(single side), pressing time as the influence factors, and through the orthogonal experiment to find the optimized gluing process parameters.On this basis,the effect of gluing process,combined texture and angle of the special-shaped unit on bonding properties of glulam was studied. The results showed that the optimal gluing process parameters of bonding pressure, glue amount(single side) and pressing time were 0.7 MPa, 220 g/m~2,40 min, respectively. The bonding pressure had a significant effect on the gluing shear strength. The glue amount and the pressing time had no significant effect on the bonding properties. As the bonding pressure increased, the gluing shear strength decreased. Different texture combinations and angles of the beveled elements of the special-shaped unit had a significant effect on the shear strength, while had no significant effect on the wood breakage rate. As the angle of the bevel of the trapezoidal unit increased, the gluing shear strength increases. The combination of string and chord texture had the highest shear strength.
引文
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[16]方晓阳,徐伟,黄琼涛.人工林小径柚木物理力学性质研究[J].林业机械与木工设备,2019,47(5):40-44,50.
[2]方晓阳,徐伟.小径材应用研究概况[J].林产工业,2018,45(11):42-46.
[3]徐晓沐,高科达.水性高分子异氰酸酯(EPI)胶黏剂在集成材加工中的应用和参数控制[J].化学与粘合,2007,29(2):134-136.
[4]LY/T1787-2016非结构用集成材[S].北京:中国标准出版社,2016.
[5]刘亚兰.木制品质量检测技术[M].北京:化学工业出版社,2005:203-206.
[6]农林水产省告示第235号构造用集成材日本农林规格[S].平成15年2月27日.
[7]彭立民,王金林.集成材胶合工艺的研究[J].木材工业,2004,18(3):29-31.
[8]洪璐,孙德林,刘明辉,等.提高实木拼板尺寸稳定性的方法[J].林产工业,2016,43(2):34-35.
[9]姚利宏,王喜明,费本华,等.胶合工艺对桉/杨Ⅰ类胶合板胶合强度的影响[J].木材工业,2008,22(6):34-36.
[10]毛卫国,徐伟,黄琼涛,等.实木家具力学性能与选材指标分析[J].林业科技开发,2015,29(6):127-131.
[11]刘涛,陈于书.实木桌面板防变形的结构措施研究[J].家具与室内装饰,2017(2):70-71.
[12]陈于书,刘娜.桉木多层板插接结构T型构件力学强度的研究[J].林产工业,2017,44(10):21-26.
[13]秦理哲,林兰英,傅峰,等.粉状改性脲醛胶的胶合工艺及性能研究[J].林产工业,2014,41(6):24-27.
[14]孙健,傅峰.人工林杉木胶合工艺优化研究[J].木材加工机械,2011,22(3):28-31.
[15]庞凤艳.落叶松人工林小径木异型材集成加工技术与工艺研究[D].哈尔滨:东北林业大学,2011.
[16]方晓阳,徐伟,黄琼涛.人工林小径柚木物理力学性质研究[J].林业机械与木工设备,2019,47(5):40-44,50.