Syringe mold

A syringe mold including a core cylinder for forming the inner circumference of a syringe having a communicating groove for mixing two medical agents, wherein the core cylinder comprises a jig container space extending axially, a coolant circulation outward and a coolant circulation homeward which are partitioned by the outer circumference of the jig container space and communicate at the tip portion of the core cylinder, and one or more slots which communicate with the jig container space and have openings on the circumference of the core cylinder,

• the one or more slide cores are respectively inserted into the one or more slots allowing the slide in the radial direction of the core cylinder to form the communicating groove,
• the jig container space contains a slide core operating jig which is in engagement with the slide cores,
• and the slide cores are put in the position where the slide cores protrude from the circumference of the core cylinder and the position where the slide cores are immersive in the circumference of the core cylinder by moving the slide core operating jig forward and backward in the axial direction of the core cylinder.