滚塑模具热传导数值分析与性能优化研究

Heat Conduction Numerical Analysis and Performance Optimization Research of Mold in Rotational Molding

滚塑成型是一种极具发展潜力的高分子材料成型技术。滚塑模具是滚塑成型设备的关键部件,其外表面结构形式影响热传导特性,进而对滚塑成型质量有决定性影响。建立三种具有代表性的模具结构,对其热传导特性进行研究。依据数值传热学基本理论与滚塑特有的工艺条件,建立有限元分析模型,研究模具在加热与冷却工艺过程中热传导的特点与制品性能差异。得到了相关物理量随时间和空间的数值分布,结果表明圆柱状表面结构模具在加热过程中具有温度场均匀性较好,在冷却过程中散热效率高等诸多特点,有利于获得高质量的滚塑产品。数值分析结果为模具在不同工艺条件下的优化设计提供了依据。

Rotational molding process is a great potential development technology of polymer materials molding.Roll-plastic mold are key components of roll forming equipment, and its surface structure affects the heat transfer characteristics, and then has a decisive influence on roll forming quality. Sets up three kinds of typical mold structure, to study the heat transfer characteristics. Based on the numerical heat transfer basic theory and rotational molding specific process conditions, establishes the finite element analysis model, studies the mould characteristics in the process of heating and cooling process in heat transfer and products performance difference. Obtaines the related physical quantities over the value of time and space distribution. The results show that the heating uniformity of cylindrical surface structure mould temperature field is good in the process of heating, and many other characteristics that higher thermal efficiency in the cooling process, easy to obtain high quality plastic products. The results of numerical analysis for the mould under different process, conditions provide a basis for the optimization design.