文献类型：期刊文献

中文题名：高频热压胶合中板坯内温度分布及变化趋势

英文题名：Variation of Temperature inside the Mats for Wood-Based Panels by High-Frequency Hot Pressing Process

作者：陈勇平[1] 王金林[1] 李春生[1] 王金平[1]

第一作者：陈勇平

机构：[1]中国林业科学研究院木材工业研究所国家林业局木材科学与技术重点实验室

年份：2011

卷号：47

期号：1

起止页码：113-117

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金："十一五"国家支撑专题"家具地板材功能修饰与仿真技术"(2006BAD18D06);引进国际先进林业科学技术创新项目专题"竹;木基重组装饰材料制造与示范"(2006-4-C04)

语种：中文

中文关键词：杨树;三聚氰胺甲醛树脂;高频;热压;温度场;乘幂函数

外文关键词：poplar; melamine-formaldehyde resin（MF） ; high-frequency; hot pressing; temperature; power function

分类号：S781.65

摘要：以杨树人工林木材单板为试材,在进行三聚氰胺甲醛树脂浸渍组坯后,利用高频设备热压成型,并以此探讨高频热压胶合中板坯内的温度场分布和变化规律。结果表明:高频热压胶合中板坯内温度随时间变化曲线可用乘幂函数表示。对于板坯的温度场分布,在板材长宽方向,因边缘各点的含水率差异导致加热过程中温度的不一致,但在超过100℃后各点温度会逐渐接近;厚度方向上,高频电场中板坯的中心或两表层温度并非最高,最高温度出现在靠近正极板的部位,最低温度出现在紧贴负极板表层。
In this paper,poplar were selected as the raw materials,melamine-formaldehyde resin（MF）was selected as adhesive,high-frequency hot pressing process was used to analyze the variation of temperature inside the mats for thick wood-based panels.The results showed the process of high-frequency hot pressing of the reconstituted lumber,power function was appropriated in describing the variation of temperatures inside the mats as a function of time.In length-width direction,the temperature may be different in heating process due to the moisture content.However,when the temperature surpass 100 ℃ ,temperature will gradually become stable.Along the direction of the thickness,the highest temperature was observed neither at the middle nor the surface layers of mats in high-frequency electric field,it occurred somewhere close to the positive plate,and the lowest temperature occurrrd near the negative plate.