Optimization of injection process parameters for motorcycle deflector decorative cover
The motorcycle deflector decorative cover was taken as the research object.In order to obtain the best injection molding process parameters,the optimal gate location and structural parameters,combined with the characteristics of the molded parts and the actual processing requirements,the warping deformation was taken as measurement indicators to analyze the injecting process.The injection system scheme was determined through gate matching analysis,and two sets of tests were designed based on taguchi experiment:the first group was to select L16(44)scheme with melt temperature,mold temperature,packing pressure and injection time as the influence factors,determine the level range of each factor through the molding process window analysis,and obtain the significant order of influence of each process parameter on warping deformation and the optimal combination of process parameters by range analysis.On the basis of the first scheme,the second group optimized the diameter of the two point gates on the part and the position of the second point gate,designed an L16(43)experiment to obtain the gate structure combination with the minimum warping deformation.The warping deformation optimized by the first taguchi experiment was 0.4891 mm,which was reduced by 2.26%compared with the minimum value of the test.The warping deformation obtained by the second group was only 0.435 8 mm,which was reduced by 10.9%compared with the initial scheme,indicating that improving the location and structure of the point gate could effectively improve the warping deformation.After the actual production verification,the parts had good surface quality and dimensional accuracy,and met the production and use requirements.
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