Mould with replaceable mould core

A mould with replaceable mould core comprising:

• a lower mould, including a lower plate, an ejector plate and an auxiliary plate, wherein the lower plate disposes an inserting recess on one side thereof, the auxiliary plate disposes a lower through hole, which is adjacent to one end of the inserting recess, the lower mould forms a cavity, and the ejector plate is movable mounted in the cavity;
• a mould core, being mounted in the inserting recess of the lower plate, and forming a core through hole, which is corresponding to the lower through hole and is communicated with the lower through hole;
• a plurality of thimbles, being mounted on the lower mould;
• an upper mould, being cooperated with the lower mould;
• and
• an anti-pulling out mechanism, being mounted on the lower and upper moulds, and including at least one spring locking steel ball, a lower ejector pin, an upper ejector pin and a movable locking pin, wherein the movable locking pin forms a holding recess, the spring locking steel ball is mounted on one side of the core through hole, one end of the lower ejector pin is received in the lower through hole and the other end thereof presses against the ejector plate, the upper ejector pin is fixed on the upper mould and is corresponding to the core through hole, and the movable locking pin is placed in the lower through hole and the core through hole.