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Proximity heating of CFRTP molding dies by using high-frequency direct current

机译:使用高频直流电对CFRTP模具进行近程加热

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In the automobile industry, it is required to reduce the weight of cars for better fuel consumption. Recently, Carbon Fiber Reinforced Thermoplastics (CFRTP) are expected to be used for lightweight component parts. However, the cost of CFRTP is so high that the use of CFRTP is barely applied in the automobile industry. In order to lower the cost of CFRTP, simple equipment and low consumed power are necessary. High-frequency direct resistance heating to CFRTP molding dies becomes possible to solve these issues. High-frequency direct resistance heating is a method that alternating current is directly applied to a metal, and metal surface is heated by skin effect. When opposite directions of an alternating current flow in a pair of metal sections which face each other with a small gap, the proximity effect also promotes the concentration of current density on proximal surfaces of the metal and heats the metal surface intensively by joule heat. By applying high-frequency direct resistance heating to CFRTP molding, cost reduction as well as simplification of the facilities can be expected. In this study, in order to apply high-frequency direct resistance heating to CFRTP molding die, the effects of the proximity effect on the mold are evaluated to clarify the heating characteristics and conditions of the proximity effect, and the applicability of CFRTP molding is discussed. The experimental result reveals that the proximal surfaces can be heated by proximity effect.
机译:在汽车工业中,需要减轻汽车的重量以提高燃料消耗。最近,碳纤维增强的热塑性塑料(CFRTP)有望用于轻质部件。但是,CFRTP的成本​​很高,以至于在汽车工业中几乎没有使用CFRTP。为了降低CFRTP的成本​​,需要简单的设备和低功耗。高频直接电阻加热到CFRTP成型模具可以解决这些问题。高频直接电阻加热是将交流电直接施加于金属,并通过集肤效应对金属表面进行加热的方法。当交流电的相反方向在一对彼此面对且间隙很小的金属部分中流动时,邻近效应还会促进电流密度集中在金属的近端表面上,并通过焦耳热来集中加热金属表面。通过将高频直接电阻加热应用于CFRTP成型,可以降低成本并简化设备。在这项研究中,为了将高频直接电阻加热应用于CFRTP成型模具,评估了接近效应对模具的影响,以阐明接近效应的加热特性和条件,并讨论了CFRTP成型的适用性。实验结果表明,可以通过邻近效应加热近端表面。

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