The presence of weld line of injection molded parts would potentially fatal flaw

Weld line ( line ) is one of the common plastic injection molding defects . The presence of weld line of injection molded parts would potentially fatal flaw , the quality of plastic products as people become increasingly demanding , analysis and research weld lines have also been more and more attention . Many factors affect the weld line formation , how to eliminate or avoid the problem of weld lines designers of  Instrument valve manifold . The weld line formation is dependent on factors of mold design, material and process conditions such characteristics , including characteristic relaxation time of the material , the crystalline morphology ; process conditions including injection rate, mold temperature , melt  High pressure ball valve , injection pressure , etc. These factors are interrelated and action , for different materials and different mechanism of action of these . Which gate location and number of injection mold gating system design often play a decisive role . For the structure of the gate hot runner design and control , at home and abroad has been a targeted research and applications. Through the study of the formation mechanism of injection molding weld line , analyzing the characteristics of the control valve casting , CAE software melt filling model based on dynamic control by changing the flow direction of the melt and flow , injection molded parts to eliminate or avoid the appearance of weld lines purposes.