Injection mold plate module having switchable sub-runners

An injection mold comprising:

• a mold plate module comprising:
• a mold plate comprising a first surface, a blind hole defined in the first surface, a through hole defined in a bottom surface of the mold plate in the blind hole, and two first sub-runners defined in the first surface connected to the blind hole;
• and
• an inserting block comprising a second surface and a lateral surface, a block through hole defined in the second surface to allow flow of molding material and at least one second sub-runner defined in the second surface, the lateral surface adjoining and surrounding the second surface, the at least one second sub-runner communicating with the block through hole and extending toward and terminating at the lateral surface and, the inserting block being detachably received in the blind hole and rotatable relative to the mold plate to switchingly couple the at least one second sub-runner with the first sub-runners;
• a supporting plate, the supporting plate and the mold plate cooperatively forming two mold cavities communicating with the corresponding first sub-runners;
• and
• a sprue bushing comprising a sprue, the sprue bushing received in the blind hole with the sprue communicating with the block through hole.

A mold assembly comprising:

• a mold plate having a first through hole and a plurality of molding cavity recesses;
• a sprue bushing inserted in the first through hole, the sprue bushing comprising a sprue for introducing molding material into the molding cavity recesses;
• a blind hole defined in the mold plate and communicating with the first through hole;
• a plurality of first sub-runners each having a first end connected to the corresponding molding cavity recess and an opposing second end connected to the blind hole;
• and
• a cavity switching block comprising a second through hole, and at least one second sub-runner, the second through hole having a first end coupled to the sprue and an opposing second end connected to the at least one second sub-runner, the cavity switching block being engagingly received in the blind hole and rotatable relative to the mold plate to switchingly couple at least one of the first sub-runners to the at least one second sub-runner, thereby allowing the molding material to be introduced into the corresponding molding cavity recess.