High-speed compression molding process of carbon fiber reinforced thermoplastics (CFRTP) by means of electromagnetic induction heating system (IH system) using non-woven stitched multi-axial cloth (NSMC) were proposed in this study. This IH system allows heating of the mold surface instantaneously. There is no need to preheat the mold and the material before placing it in the mold. This system can also reduce production cycle times and the cost of manufacturing composite parts. Specimens were molded by a traditional hot press processing and IH system. While the hot press processing required 50 minutes to raise the temperature of the mold from 50 to 250 , IH system required only 70 seconds. Mold cooling of the IH system finished in only about 150 seconds. Comparing with the traditional hot press processing, this IH system can reduce production cycle time drastically. The CF/polyamide 6 specimens molded by IH system had higher bending strength and better impregnation than these molded by the hot press processing. While the void content of specimens molded by the traditional hot press processing were more than 10%, specimens molded by IH system had only about 5% void content. In case of IH system, not only mold but also carbon fiber itself is heated by electromagnetic field. Since this heated carbon fiber accelerates the resin impregnation into the carbon fiber bundle, the void content of the specimens molded by IH system is smaller than that by hot press.

Carbon Fibre Reinforced Plastics (CFRP) can offer a great deal of automobile weight saving. For automotive applications, however, they are not used well due to their low energy absorption and long production cycle time. Hybrid composite laminates of Carbon Fibre Reinforced Plastics/Aramid Fibre Reinforced Plastics (CFRP/AFRP), based on thermosetting resin, have a high strength to weight ratio and high energy absorption capacity. When CFRP/AFRP hybrid composite laminates will be used for the mass-produced car, it is necessary to consider the recycling efficiency and productivity. Therefore, it is preferable to use thermoplastics resin.The high-speed compression moulding method using an electromagnetic induction heating system has a big advantage for the moulding of continuous fibre reinforced thermoplastic composites, because this thermoforming technique could reduce the production cycle time drastically. In this study, a Carbon Fibre/Aramid Fibre Reinforced Thermoplastics hybrid composite (CFRTP/ AFRTP) was manufactured by the high-speed compression moulding method using an electromagnetic induction heating system, and the optimum moulding condition and mechanical properties of CFRTP/AFRTP hybrid composites were investigated.An optimum moulding condition was sought by using the design of experiments method. The factors used in this study were moulding pressure, maximum temperature holding time, materials and stacking sequences. hybrid composite that has CFRTP outermost layers has a moulding pressure of 4 MPa and holding time of 90 seconds.

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