Research On The Influence Of Structure And Properties Of Glass Fiber Reinforced Injection Molded Products By Graphite-Assisted Rapid Heat Cycle Molding Technology

Graphite-assisted Rapid heat cycle molding technology is different from the existing injection molding technology,the mold cavity temperature can be dynamic controlled.The mold cavity can be heated by the graphene coating on the mold cavity before the injection of the plastic melt,so that the mold cavity can have a higher temperature.The mold cavity is maintained at a high temperature until the cooling phase begins,which improves the fluidity and filling ability of the melt,reduces the time of forming cycle,improves the property and surface quality of the products.Fiber reinforced composite products have the advantages of high strength and light weight,and have a wide range of applications.Fiber-reinforced products morphological structure can be effectively controlled by rapid heat cycle molding technology,so the property of products can be improved,in this paper,research on the influence of different mold cavity temperatures on the morphology and macroscopical properties of products by graphite-assisted rapid heat cycle molding technology,analyze the relationship among the process-macroscopic properties-morphology structure.The details are as follows:1.The effect of graphite-assisted rapid heat cycle molding technology on the tensile properties and corresponding morphological structure of non-welded traces products was studied.The study found that compared with the conventional injection molding technology,the graphite-assisted rapid heat cycle molding technology can increase the tensile strength of the non-welded traces products,and the tensile strength increases first and then decreases with the increase of cavity temperature.The raphite-assisted rapid heat cycle molding technology can control the multi-layer structure and fiber orientation by changing the mold cavity temperature,so as to achieve the purpose of improving the tensile properties of the products.2.The effect of graphite-assisted rapid heat cycle molding technology on the tensile properties and corresponding morphological structure of welded traces products was studied.The study found that compared with the conventional injection moulding technology,the graphite-assisted rapid heat cycle molding technology can significantly improve the tensile properties of the welded traces products,and the tensile properties increase with the increase of the cavity temperature,and finally tend to be stable.The corresponding morphological structure changes as follows:The depth of the weld line gradually decreases as the temperature of the cavity increases,the degree of fiber orientation at the weld line increases,and the degree of interfacial entanglement increases.3.The effect of graphite-assisted rapid heat cycle molding technology on the surface gloss and the corresponding morphological structure of the non-welded traces products was studied.The study found that:compared with the conventional injection molding technology,the graphite-assisted rapid heat cycle molding technology can significantly improve the product's surface gloss,and the surface gloss gradually increased with the cavity temperature improved.The corresponding morphological structure changes as follows:The roughness increases first and then decreases.The defect of floating fiber is gradually improved and the crystallinity is increased with temperature increased.4.The effect of graphite-assisted rapid heat cycle molding technology on the apparent extent of the weld line and the corresponding morphological structure was studied.The study found that:compared with the conventional injection technology,the graphite-assisted rapid heat cycle molding technology can significantly reduce the obvious degree of weld traces,and with the increase of cavity temperature,the the obvious degree of weld traces gradually decreased.The corresponding morphological structure changes as follows:The depth and width of the weld line gradually decrease with the temperature of the cavity increases.