COMPOSITE INJECTION MOLDING METHOD AND COMPOSITE INJECTION MOLDING APPARATUS

摘要

To provide a composite injection molding method that includes an energy-saving type sandwich molding machine and attains the reduction in the loss of thermal energy given to a skin layer material resin.SOLUTION: On the basis of the molten resin temperature of a molten resin at a skin layer injection part 45 for heating a pellet forming a skin layer S while rotating a screw 36 in a cylinder 34, melting the pellet and injecting the molten pellet as needed, and at a core layer injection part 15 for heating a pellet forming a core layer C within the skin layer S while rotating a screw 6 in a cylinder 4, melting the pellet and injecting the molten pellet as needed, a molten resin soft at the molten state is used for the molding of the skin layer S and a molten resin not soft at the molten state is used for the molding of the core layer C such as a core layer therewithin.SELECTED DRAWING: Figure 1