轻质木丝板材热压内环境研究  

Study on the internal environment of the light weight wood wool boards during hot-pressing

作　　者：吴赵旭[1] 潘景[1] 母军[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《木材加工机械》2013年第4期50-54,共5页Wood Processing Machinery

基　　金：林业公益性行业科研专项:低成本无烟高效阻燃木质材料制造关键技术研究(201204704)

摘　　要：采用温度传感器在线监控板坯芯层温度变化，并检测板力学性能，探讨热压时板坯芯层温度变化与密度、板厚、含水率及表面喷蒸等的关系。研究表明：10～20ram板坯芯层温度变化可分为快速升温段、恒温段和慢速升温段三个阶段；25～40mm板坯芯层温度变化可分为短暂恒温段、快速升温段和恒温段三个阶段。厚度对木丝板芯层温度变化影响最大；在热压过程前对板坯进行表面喷蒸，可使传热效率提高约12％～50％。轻质木丝板芯层的传热速率对木丝板的力学性能影响需进一步实验探讨。Dynamic data of temperature changes in the core could be logged through a temperature transducer using online monitor in this study. Effects of different parameters on the core layer＇ s temperature of mat and mechanical properties of mats were analyzed based on the data. Results showed that： the core temperature-time curve of 10-20mm could be divided into three stages, a stage of a rapidly rising temperature, a stage of constant temperature and a stage of a slowly increasing temperature; the core temperature-time curve of 25-40mm could also be divided into three stages, a short stage of constant temperature, a stage of a rapidly rising temperature, a constant stage of moisture vaporizing. The mechanical properties of the board were directly affected by thickness＇s the heat transfer efficiency of the mat was increased by 12%- 50% by using steaming on the surface of mats under different thickness before hot-pressing. The effect of the heat transfer efficiency on the mechanical properties of the board needs further experiments.

关 键 词：轻质木丝板 热压 内环境 表层喷蒸 力学性能 

分 类 号：TS653[轻工技术与工程]