塑料热板焊接传热的解析模型  

Mathematical Model for Heat Transfer in Heated Tool Butt welding of Plastics

作　　者：谷侃锋[1] 霍立兴[1] 张玉凤[1] 阳代军[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《中国塑料》2003年第6期68-71,共4页China Plastics

基　　金：国家自然科学基金资助项目 (5 0 0 75 0 61)

摘　　要：对塑料热板焊接传热进行了探讨 ,给出简化的物理模型 ,并转化为双区域计算及熔化热数学模型 (即Stefan Neumann问题 ) ,同时做出解答。然后通过算例 ,应用所建立的数学模型计算出温度分布曲线及加热时间 ,并与通过实测得出的温度分布曲线及加热时间进行比较和讨论。结果表明 ,采用此数学模型计算得出的温度分布曲线与实测曲线基本符合 。Problems of heat transfer in welded plastics boards are studied.A simplified physical model was built and transformed to two region calculation and melting and heat mathematical model; an answer was given. Based on an example, the temperature profile and heating time were calculated according to the mathematical model and compared with those of experiment. It was noted that the temperature calculated conformed to that of experiment basically; the heating time calculated went well with that of experiment.

关 键 词：热板焊 加热模型 温度分布 聚乙烯管道 相变潜热 

分 类 号：TQ320.674[化学工程—合成树脂塑料工业]