滚塑成型过程传热模型的解析解  

Analytic solution of heat⁃transfer model in rotomolding process

作　　者：温原 郭德宇 WEN Yuan;GUO Deyu(Zhejiang Rotoun Plastic Technology Corp,Ningbo 315323,China)

机构地区：[1]浙江瑞堂塑料科技有限公司,浙江宁波315323

出　　处：《中国塑料》2025年第2期45-53,共9页China Plastics

摘　　要：建立了电加热滚塑机的传热模型,使用单位时间内的能量守恒定律,建立并求解了炉内空气温度、模具温度、物料温度和模内空气温度的解析解。该解析解在加热段是一个特定的六阶齐次常系数微分方程的一组解,在冷却段是一个特定的三阶齐次常系数微分方程的一组解,这些解均可通过矩阵计算简单求出。通过试验对该解析解进行了验证,结果显示,计算值和实测值有相当高的吻合度。模内空气温度的计算精度为97.51%,炉内空气温度的计算精度为98.02%。物料温度的模拟计算结果不支持现有的粉末着模理论。工程上使用模内温度曲线作为质量控制的方法存在一定的局限性。In this study,a heat transfer model was established for an electric heating rolling machine,and a law of energy conservation per unit time was used to establish and solve analytical solutions for the air temperature inside the furnace,mold temperature,material temperature,and mold air temperature.This analytical solution is a specific set of solutions for a sixth order homogeneous constant coefficient differential equation in the heating section,and a specific set of solu-tions for a third order homogeneous constant coefficient differential equation in the cooling section.These solutions could be easily obtained through matrix calculation.The analytical solution was validated through experiments,and the results indicated a high degree of agreement between the calculated and measured values.The calculation accuracy of the air temperature inside the mold was 97.51%,and the calculation accuracy of the air temperature inside the furnace was 98.02%.The simulation calculation results of material temperature do not support the existing powder deposition theo-ry.The use of in-mold temperature curves as a quality control method in engineering has some limitations.

关 键 词：滚塑 传热模型 解析解 

分 类 号：TQ320[化学工程—合成树脂塑料工业]