Analysis of the Effect of Sequential Injection Molding on Weld Lines Properties

This study analyzes a sequential injection molding process to improve weld lines properties and morphology using in-flow phenomena. varioterm technology has been applied and the combination of these techniques led to significant improvements on mechanical properties and weld line appearance. Fiber orientation has been improved and the interfacial bonding at weld line surface has been promoted, resulting in better local properties. weld line skin marks could possibly be eliminated.