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A Combined In-Mold Decoration and Microcellular Injection Molding Method for Preparing Foamed Products with Improved Surface Appearance

机译:模内装饰与微孔注射成型相结合的方法用于制备表面外观得到改善的泡沫产品

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摘要

A combined in-mold decoration and microcellular injection molding (IMD/MIM) method by integrating in-mold decoration injection molding (IMD) with microcellular injection molding (MIM) was proposed in this paper. To verify the effectiveness of the IMD/MIM method, comparisons of in-mold decoration injection molding (IMD), conventional injection molding (CIM), IMD/MIM and microcellular injection molding (MIM) simulations and experiments were performed. The results show that compared with MIM, the film flattens the bubbles that have not been cooled and turned to the surface, thus improving the surface quality of the parts. The existence of the film results in an asymmetrical temperature distribution along the thickness of the sample, and the higher temperature on the film side leads the cell to move toward it, thus obtaining a cell-offset part. However, the mechanical properties of the IMD/MIM splines are degraded due to the presence of cells, while specific mechanical properties similar to their solid counterparts are maintained. Besides, the existence of the film reduces the heat transfer coefficient of the film side so that the sides of the part are cooled asymmetrically, causing warpage.
机译:本文提出了一种将模内装饰注射成型(IMD)与微孔注射成型(MIM)相结合的模内装饰和微孔注射成型(IMD / MIM)方法。为了验证IMD / MIM方法的有效性,进行了模内装饰注射成型(IMD),常规注射成型(CIM),IMD / MIM和微孔注射成型(MIM)的仿真和实验比较。结果表明,与MIM相比,该薄膜可使尚未冷却并变成表面的气泡变平,从而改善了零件的表面质量。膜的存在导致沿着样品厚度的温度分布不对称,并且膜侧较高的温度导致电池向其移动,从而获得了电池偏移部分。但是,由于单元格的存在,IMD / MIM花键的机械性能会降低,同时保留类似于其固态对应物的特定机械性能。此外,薄膜的存在降低了薄膜侧面的传热系数,使得部件的侧面不对称地冷却,从而引起翘曲。

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