在不考虑单板在热压过程中的热解等因素的情况下,根据单板热压前后木材质量不变的假设,综合研究了单板压缩率、密 度与热压因素和单板初含水率之间的关系,确定单板压缩率与各个主要因素之间的关系方程,建立单板密度变化模型。多因素 实验结果表明所建立的密度模型具有一定的准确性,尤其是当热压压力低于5 MPa时,模型预测值与实测值间的误差较小。
Abstract
The relationships among the compression ratio of veneer, the hot-pressing factors and initial moisture content of veneer were investigated based on the hypothesis that veneer weight will not change before and after hot pressing without considering wood pyrolysis during hot pressing. The relation equation between the compression ratio of veneer and the main factors was determined, and the model of density fluctuations was further established. The result of multiple factors test showed that the veneer density model was exact when the hot-pressing pressure was lower than 5 MPa.
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参考文献
[1] 金维洙,蔡立新.定向成材发展概况及前景分析[J].木材加工机械,1997(3):2-6.
[2] 王进武.工程结构材概述[J].广东林业科技,1997,13(2):45-48.
[2] Liu Yihai. Evaluation on Properties of Parallel Strand Lumber[M].Ann Arbor Mich:UMI, 2002.
[4] 王石建.碎单板条定向成材的力学性能预测[D].南京:南京林业大学,2010.
[5] 陈桂华,向仕龙.单板条层积材的研究[J].林产工业,1993,20(5):6-8.
[6] 陈志林,张勤丽,洪中立.杨木单板条层积材工艺参数的研究[J].林产工业,1994,21(4):10-13.
[7] 陈志林,张勤丽,洪中立.杨木单板条层积材热压工艺的研究[J].木材工业,1994,8(2):1316.
[8] 刘则毅,刘东毅,马逢时,等.科学计算技术与Matlab[M].北京:科学出版社.2001.
[9] 杨德.实验设计与分析[M],北京:中国农业出版社.2002.
[10] Kollmann F F P, Cote W A. Principles of Wood Science and Technology: I. Solid Wood [M]. New York: Springer-Verlag Berlin Heidelberg, 1968.
[11] 卢晓宁,陈宇聪,陈颖.速生杨木单板顺纹弹性模量预测模型[J].南京林业大学学报:自然科学版,2002,26(3):9-13.
基金
收稿日期:2011-07-12 修回日期:2011-11-29 基金项目:国家林业公益性科研专项项目(201104042); 江苏省科技攻关项目(201104042); 江苏省苏北科技发展计划 (BC20111413); 江苏省科技型企业技术创新资金项目(BC2010419) 第一作者:宋明鑫,硕士。*通信作者:卢晓宁,博士。E-mail: luxiaoning@njfu.edu.cn。引文格式:宋明鑫,王石建,高婧,等. 单板热压后密度模型研究[J]. 南京林业大学学报:自然科学版,2012,36(4):112-114.
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