Dissertation > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues

CAE simulation analysis of injection molding defect prediction

Author WangJiaHui
Tutor LiuJianXiong
School Kunming University of Science and Technology
Course Mechanical Manufacturing and Automation
Keywords Injection Molding CAE Simulation analysis MPI Defect prediction
Type Master's thesis
Year 2003
Downloads 333
Quotes 9
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In today's society , the mold industry has become one of the important basic industries in the national economy , the design and manufacture of plastic mold in China mainly relies on the experience of designers and process skills , the design is reasonable or not , products for defects only through trial the modulus know , mold design and manufacturing cycle , high costs . The use of computer-aided engineering ( CAE ) , can improve the plastic mold design and manufacturing standards and product quality . Injection molding CAE technology for plastic injection molding process simulation analysis , include the filling flow simulation , simulation of the packing process , cooling process simulation and warpage simulation analysis . Simulation analysis can predict lack of product filling , weld marks , bubbles and warpage and other defects , and can be determined the quantity and location of the gate , the determination of the injection when the injection pressure and the injection time , the melt flow striker temperature changes, shear stress, shear rate parameters. This paper introduces the contents of the injection molding CAE technology , method and its development to proceed on the flow simulation analysis , the cooling simulation analysis and warpage simulation analysis theory and simulation software MPI ( Moldflow Plastics Insight ) the role and function do detailed presentation. The focus of the application MPI software the six plastic products injection molding process flow , pressure , cooling and warpage simulation analysis , forecast products possible defects . Proven , the simulation results with actual production is consistent , and for the various defects by changing the molding material , molding process conditions , molding equipment and other parameters to optimize the simulation analysis , and ultimately determine reasonable parameters . This process has a major value of the actual production , the use of CAE simulation technology can reduce the tryout , the number of repair mode , and shorten mold design and manufacturing cycles , reduce production costs . In addition , the article also discussed in detail the major defects of the products such as : surface defects , deformation and size bad crack and cracking the undesirable phenomenon unique in the injection and molding characteristics of the negative phenomena and its causes , and proposed for a variety of defects improvement.

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