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HYDRODYNAMICS BEHAVIORS OF PLASTICS MELT AND FLOW BALANCE IN THE“H”TYPE SUB-RUNNER OF MOULD

Sun Limin1, Xu Guangmin2, Shen Changyu1 (1.National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China; 2.Zhengzhou Railway Vocational College, Zhengzhou 450052, China)  
During the production of small size plastics products with a multi-cavity mould, it will face with a problem of flow balance about sub-runner. The relationship about dynamics behaviors of plastics melt and its flow balance in the sub-runner of mould is found by analyzing the dynamics of liquid flow in pipe. The flow balance in the sub-runner of mould is sensitive to injection rate of plastics melt. In making plastics products, regulating the injection rate of plastics melt is a key.
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