Combined injection moulding and extrusion

A method for manufacturing a part, the method comprising:

• performing an injection molding, the injection molding comprising injecting a molten material into a mold at an injection gate into a tapered cavity, the mold comprising a first portion, a second portion, and an inner core, and the first portion includes at least a first component and a second component at an opposite end of the second portion,
• wherein the tapered cavity is wider in the first portion than the second portion,
• wherein during the injection molding, the inner core extends from outside the first portion, through the first portion and into the second portion, and
• wherein after the injection molding, the part is produced in a first length;
• performing an extrusion after the injection molding on the part to lengthen the part to a second length, the extrusion comprising injecting additional molten material at the injection gate, pushing the additional molten material through an extrusion die located within the first portion of the mold, moving the second portion away from the first portion, while the first portion remains in a fixed location;
• cooling the first component and the second component;
• and
• disassembling the mold by separating the first portion, the second portion, and the inner core from each other.