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injection moulding of plastics Description
The classification and characteristics of weld line of injection-molded parts are introduced. The cause and effect of injection process parameters,including melt temperature,mould temperature,the velocity of mould filling,injection time,injection pressure,packing pressure and post-treatment conditions,on the appearance and property of the weld line are analyzed,with the emphasis on the advance in the research of the influences of injection process parameters on the property of weld line. Parametric optimization,the research on the relative significance of each factor on the weld line strength and numerical simulation technology are reviewed.The methods to improve the mechanical properties of injection-molded parts with weld line are given according to different affecting factors.
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