Research On Non-Contacting Electromagnetic Induction Heating Of Carbon Fiber Reinforced Conductive Composite Plastics

Application of plastics in life and industry is more and more widely, at the same time, while the higher requirement to plastic products performance is put forward. At present, a variety of composite plastics with different properties appear, including conductive composite plastics. Conductive composite plastics have not only the advantages of plastic but also electrical conductivity, so they can be used in electrical and electronic, aerospace, military industry and other fields.With the application of electromagnetic induction heating technology, the conductive composite plastics can be inductive heated and melt quickly to realize the connection of products with complex shapes, or the coat by carbon fiber in plastics where need local reinforcment, or the pre-molding of carbon fiber reinforced products. In this paper, the heating effect of electromagnetic induction heating technology on conductive composite plastics was studied.Conductive composite plastics were prepared. Polypropylene (PP) and acrylonitrile-butadiene-styrene (ABS) as the matrix resin, carbon fiber and acetylene carbon black as the conductive filler. By using the triple-screw extruder to realize the melt blending of Acetylene black and matrix resin, and the casting film machine to fabricate the sheet of matrix resin, the hot pressing machine was used to fabricate the laminated conductive composite plastics wafer with different structures and different materials.Before the actual heating experiment, the Maxwell software is used to simulate and analyze the effect of the coil shape, current value, heating spacing between the coil and the heated materials on the magnetic field intensity and distribution, the ohmic loss and distribution in the lacation of the carbon fiber material surface. At last some relevant conclusions of electromagnetic induction heating are obtained, which can be used to estimate the electromagnetic induction heating effect and guide the design and optimization of the coil in electromagnetic induction heating equipment.Firstly the experiment of electromagnetic induction heating of carbon fiber material was carried out to verify the correctness of the simulation results, and provide the reliability for simulation guide the actual. Secondly the experiment which focus on the type of heat generation mechanism of carbon fiber reinforced conductive composite plastics was instituted, and drew the heat generation mechanism is Joule loss. Finally the effects of induction heating current value and coil shape, conductive composite plastics'structure and material types on electromagnetic induction heating rate of carbon fiber reinforced conductive composite plastics were studied.