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首页> 外文期刊>Journal of Applied Polymer Science >Improving appearance quality of injection molded microcellular parts through mold coating of PTFE and zirconia
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Improving appearance quality of injection molded microcellular parts through mold coating of PTFE and zirconia

机译：通过PTFE和氧化锆的模具涂层提高注塑微孔件的外观质量

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摘要

The application of microcellular parts in the field of high appearance quality is limited due to its appearance defects. In order to improve the appearance quality of microcellular parts, low heat transfer coefficient mold coating with PTFE and zirconia was employed in this study. The appearance quality of microcellular was evaluated by the surface roughness of microcellular parts. The numerical and experimental results show that delayed heat transfer between the melt and the mold can be achieved through both mold coatings, which improve the melt fluidity and reduce the shear force of the mold on the melt effectively. It is demonstrated that the PTFE has a better effect of delay heat transfer under thinner coating. The polished zirconia coating shows more conducive to the melt wall slip due to its stable molecular structure and smooth surface, resulting in microcellular parts with better appearance quality.
机译：由于微孔零件的外观缺陷，限制了其在高外观质量领域的应用。为了提高微孔零件的外观质量，本研究采用了PTFE和氧化锆的低传热系数模具涂层。通过微孔零件的表面粗糙度来评价微孔零件的外观质量。数值计算和实验结果表明，两种模具涂层均能实现熔体与模具之间的延迟传热，有效地提高了熔体流动性，降低了模具对熔体的剪切力。结果表明，在涂层较薄的情况下，PTFE具有更好的延迟传热效果。抛光后的氧化锆涂层分子结构稳定，表面光滑，更有利于熔体壁滑移，使微孔零件具有更好的外观质量。

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