Injection molding system and injection molding method

An injection-molding method, comprising:

• providing an extruding system configured to produce a mixture of a polymeric material and a blowing agent, a plurality of discharging channels communicable with the extruding system, wherein each of the plurality of discharging channels includes an outlet distal to the extruding system and configured to discharge the mixture, and the outlets have same or different widths;
• providing a first molding device and a second molding device disposed adjacent to the first molding device, wherein the first molding device includes a first hollow space and a plurality of first feeding ports communicable with the first hollow space and correspondingly engageable with the outlets, and the second molding device includes a second hollow space and a plurality of second feeding ports communicable with the second hollow space and correspondingly engageable with the outlets;
• docking the outlets to the corresponding first feeding ports to form first flow paths of the mixture;
• heating the discharging channels or the first feeding ports;
• securing the plurality of discharging channels to the first molding device by turning a supporting unit into a lock state when the outlets are docked with the first feeding ports;
• injecting a first amount of the mixture into the first hollow space through the outlets and the first feeding ports;
• disengaging the outlets from the first feeding ports;
• shifting the supporting unit into an unlocked state before the disengaging of the outlets from the first feeding ports;
• docking the outlets to the corresponding second feeding ports to form second flow paths of the mixture;
• injecting a second amount of the mixture into the second hollow space through the outlets and the second feeding ports;
• and
• disengaging the outlets from the second feeding ports.