Injection molding device

An injection molding device comprising:

• an upper mold defining a main flow passage and two adjusting holes adjacent to the main flow passage;
• a lower mold coupled to the upper mold in such a manner as to allow their separation, a receiving cavity being cooperatively formed between the upper and lower mold, the lower mold defining a lower half molding cavity in communication with the receiving cavity;
• and
• a core insert received in the receiving cavity, the core insert defining an upper half molding cavity in communication with the receiving cavity and a secondary flow passage communicating the main flow passage with the receiving cavity, the core insert comprising two adjusting poles connected perpendicularly to the upper end surface for passing through the two adjusting holes so that the core insert is rotatable in the receiving cavity and is movable along an axis of the core insert, wherein after the core insert being assembled between the lower mold and the upper mold, the core insert is configured to be movable relative to the receiving cavity so as to allow the lower half molding cavity and the upper half molding cavity to cooperatively form a full molding cavity.

An injection molding device comprising:

• an upper mold defining a main flow passage;
• a lower mold coupled to the upper mold in such a manner as to allow their separation, a receiving cavity being cooperatively formed between the upper and lower mold, the lower mold defining a lower half molding cavity in communication with the receiving cavity;
• and
• a core insert received in the receiving cavity, the core insert defining an upper half molding cavity in communication with the receiving cavity and a secondary flow passage communicating the main flow passage with the receiving cavity, wherein after the core insert being assembled between the lower mold and the upper mold, the core insert is configured to be manually adjusted to move in the receiving cavity so as to allow the lower half molding cavity to move towards the upper half molding cavity from an offsetting state to an aligning state, wherein the offsetting state is where the secondary flow passage aims at the lower half molding cavity and the lower half molding cavity offsets relative to the upper half molding cavity, and the aligning state is where the secondary flow passage aims at an upper surface of the lower mold adjacent to the lower half molding cavity, and the lower half molding cavity aims at the upper half molding cavity.