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Effective properties of particle reinforced polymeric mould material towards reducing cooling time in soft tooling process

机译:颗粒增强聚合物模具材料在减少软加工过程中的冷却时间方面的有效性能

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摘要

Cooling time in soft tooling process using conventional mold materials is normally high. Although increase of effective thermal conductivity of mold material by inclusion of high thermally conductive fillers reduces the cooling time, it affects other properties (namely, stiffness of mold box and flow ability of melt mold material), which play important roles in soft tooling process. Therefore, to apply composite polymer in soft tooling process as mold material simultaneous studies of these properties are important. In this work, extensive experimental studies are made on the effective thermal conductivity, modulus of elasticity and viscosity of composite polymeric mold materials namely Polyurethane and RTV (Room Temperature Vulcanizing)-2 silicone rubber, with aluminum and graphite particle reinforcements. To find suitable models of the effective properties of composite mold materials, which are required to decide the optimum amount of filler content before actual application, attempts are made to fit the experimental results using various models reported in the literature. Finally, different aspects in reducing cooling time in soft tooling process and further activities are reported.
机译:使用常规模具材料的软加工过程中的冷却时间通常较长。尽管通过加入高导热性填料来提高模具材料的有效导热率会减少冷却时间,但它会影响其他属性(即模箱的刚度和熔融模制材料的流动性),这些在软模具加工中起着重要作用。因此,将复合聚合物应用于软加工过程中作为模具材料,同时研究这些性能非常重要。在这项工作中,对铝和石墨颗粒增强的复合聚合物模具材料(即聚氨酯和RTV(室温硫化)-2硅橡胶)的有效导热系数,弹性模量和粘度进行了广泛的实验研究。为了找到复合模具材料有效特性的合适模型,在实际应用前确定最佳的填料含量,需要使用这些模型,并尝试使用文献中报道的各种模型来拟合实验结果。最后,报告了减少软加工过程中冷却时间的不同方面以及进一步的活动。

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