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With the increasing demands of precision injection molding products , the molding process parameters Warpage more and more attention of researchers . Currently, the study of different process parameters on warpage more. However , these studies factors less Mechanism . IPP crystalline plastic iPP crystalline and amorphous iPP density difference of up to 13% , this will have an impact on the contraction of the material , and the uneven shrinkage often lead to products warp . In this paper, the 5 factors and 4 levels of the orthogonal table arrangements 16 experiments , injection molding parameters to be adjusted , the study of the law of iPP Warpage and crystallinity with the molding process parameters change , and the relationship between be explored . Article to the following conclusions . 1) on the degree of warping of larger factors of dwell time and melt temperature , impact medium for mold temperature and injection speed , the less impact the holding pressure . 2) factors are more significant impact on the degree of crystallinity packing pressure, impact is the mold temperature, melt temperature, the security impact of the pressure of time and the injection speed is smaller . 3 ) by the same process parameters on warpage and crystallinity and the relationship between exploration , the paper argues that , within the range of process parameters in this study , the degree of crystallinity not necessarily change warpage change contact , the change in the degree of crystallinity is not necessarily the main factors affecting warpage .
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