Study Of Warped Deformation Problem Of Variable Thickness Plastic Part And Its Mold Joint Compensation Technology

Warped deformation of plastic products is one of the main factors affecting the productquality and precision. Due to its intrinsic structural characteristics, the degree of warpeddeformation of an unequal thickness plastic product is large during the injection moldingprocess. In order to decrease the warped deformation of unequal thickness plastic productsand improve their quality and precision, the research for warped deformation of unequalthickness plastic parts and corresponding compensation technology for mold parting surfaceis introduced.In this paper, the unequal thickness plastic parts are studied. The injection moldingprocess of plastic products is simulated through finite-element software, the warpeddeformation of plastic products is improved via optimizing process parameters, andpre-deformation compensation technology is introduced to reduce the degree of productwarped deformation on base of injection process performance optimization. The maincontents and conclusions are included as:(1)Moldflow software is used to simulate the injection molding process. Afteroptimizing the plastic part injection process performance based on the software analysisresults, the warped deformation of plastic parts can be reduced.(2)The warped deformation of products is improved by adopting a pre-deformationcompensation method. After exporting the coordinates of grid unit nodes of a product3Dmodel and the coordinates of the deformed grid unit nodes, the node coordinates forpre-deformation are calculated through equations. Numerous triangular sheets consist of thepre-deformed model construction, and the unqualified triangular sheets are optimized(3)) Mold Joint Compensation Technology is The centerline of the gating systemcreated from Moldflow software is imported into UG software. The centerline is used tocreate the gating system of the mold.(4)The precision of pre-deformed mold cavity is verified by experimental molds.Ultimately determine the mold parting surface compensation technique is e Practical...