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A modeling study on the effect of operating parameters on RHCM process using split flow channels design

机译：采用分流流动通道设计对RHCM过程的运行参数效果的建模研究

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In this work, a three-dimensional numerical study of thermal behavior of RHCM mold for automotive parts production was undertaken. Particularly, simulation of several heating/cooling cycles was conducted to determine, at the regular cyclic regime, thermal behaviors at cavity/core plates and polymer as well as thermal and hydrodynamic behaviors at cooling water. It was demonstrated that heating/cooling channels with split flow design are suitable for RHCM regulation. Besides, to further promote part quality, process productivity, and profitability, the effect of cooling parameters, such as the coolant temperature and flow velocity in channels, on the RHCM process efficiency was analyzed. To highlight the influence of these parameters on the productivity and profitability of the process, the cycle time and the consumed energy were used. Temperature gap at the cavity plate surfaces after the heating phase as well as the maximum temperature difference (MTD) in the polymer part after the cooling phase were used as criteria to evaluate the automotive part quality. The results show that the coolant temperature increase in the range between 30 and 60 degrees C reduces the energy consumption and improves the finished product quality with almost the same cycle time obtained by low coolant temperature. As regards to coolant flow velocity effect, an optimum value of about 1 m.s(-1) improves part quality and provides a compromise between the cycle time and process profitability.
机译：在这项工作中，进行了用于汽车零部件生产RHCM模具的三维数值研究。特别地，进行了几种加热/冷却循环的模拟以在常规循环状态下确定腔/芯板和聚合物处的热行为以及冷却水处的热和流体动力学行为。据证明，具有分配流动设计的加热/冷却通道适用于RHCM调节。此外，为了进一步推广部分质量，过程生产力和盈利能力，分析了冷却参数的影响，例如冷却剂温度和通道中的流速，在RHCM工艺效率上进行了影响。为了突出这些参数对过程的生产率和盈利能力的影响，使用循环时间和消耗的能量。在冷却相后，在加热相之后的腔板表面处的温度间隙以及聚合物部分中的最大温差（MTD）用作评估汽车部件质量的标准。结果表明，30至60摄氏度之间的冷却剂温度升高降低了能量消耗，并通过低冷却剂温度获得的几乎相同的循环时间来提高成品质量。关于冷却剂流速效应，最佳值约为1米（-1），提高了部件质量，并在循环时间和工艺盈利能力之间提供折衷。

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