High Flash Aluminum And ABS Plastic Blending Injection Molding Process And Weld Line Research

With the development of science and technology, people'requirements for the appearance of producter is stricter and stricter,and flash special effect color product more and more be commended. The traditional processing program is to use spray technology, but spraying process, one the on hand, process complex high production costs, and spraying process easily produce environmental pollution. So adding metal in the plastics substrate pigments to injection molding, can increase the blending of parts gloss and flash effect, effectively reduce the production cost, improve market competitiveness.In this paper, high flash aluminum and ABS resin blend is the research object. By using experiment and simulation technology, to explore the process parameters influence on the mechanical properties of blends of samples and how to conduct research to improve the weld line.The article involves the following areas:Firstly, this article describes the blend of engineering materials at home and abroad on the theory and injection molding equipment, and in accordance with the use of blending theory to define the extrusion process of the blends for extrusion granulation. For preparation of blend injection, and the orthogonal experimental design method is used to deeply studied different blend percentage content and the process parameters on the influence degree of the comprehensive mechanical properties,such as tensile properties, impact resistance and surface hardness of the samples. Comprehensive analysis of orthogonal test method is used for analyzing the mechanical properties of the various quality indicators, to obtain the optimal parameter which take into account the best technology parameter combination of each target, and further verify the poptimal paramete.Secondly,taking the rapid heat cycle molding as basic of theoy, improve weld line of blends parts by using localized heating technology of die cavety. The mold structure is given to add heating and thermocouple temperature control system in the fixed mould plate.At first, the pure ABS resin is chosen to carry on the localized heating experiment and explore the improving function of weld line by using local heating technology, then select blends to carry on experiment,to research the influence of the blend weld on the surface of the workpiece in different cavity heating temperature, melt temperature and the percentage formula. And compared with the ordinary injection molding,pointed out the advantage of local heating technology molding. Thirdly,according to sequntial injection molding theory, establishes the cars' hinder bumpers three-dimensional modelling of car's bumpers, and use CAE saftware to simulate the injecting with 3 gates. Studies the influence to the temperature of the melt striker, viscosity and flow velocity, injection pressure, and the position of weld line in different valve gate open time, to realize the weld line position is dynamic controled, and make the weld line in appearance is not obvious position or direct eliminating weld line, improving the quality of injection products purpose.There is the certain reference significance and application value.for actual production of products designed.