A syringe core rod forming mold includes a fixed mold component and a movable mold component. A component molding surface is set between an upper mold of the fixed mold component and a lower mold of the movable mold component, and a plurality of core rod cavities are provided on the parting surface. It is characterized in that at least one set of positioning components is also provided at the parting surface of the upper mold and the lower mold. The positioning component includes a bevel positioning pin and a bevel positioning sleeve which are fitted with each other. The bevel positioning pin and the bevel positioning sleeve are respectively connected with the fixed mold. The component and the movable mold component are fixed by fasteners. Upper, lower, left, and right sides of the upper and lower molds are provided with insert fixing seats, and upper and lower sides of the upper and lower molds are provided with compression blocks that cooperate with the slopes of the insert fixing seats. After the above structure is adopted: Positioning components are set at the parting surfaces of the upper and lower molds to prevent the core rod cavity arranged on both sides from being moved and fixed, and the upper, lower, left, and right sides of the upper and lower molds are set. There is a fixed block of inserts, which cooperates with the pressing block to align the upper mold and the lower mold, and the injection molded core rod is in a good position.

The core rod structure for a pull-back type safety self-destructing syringe includes a rod body, and a rubber plug limit fitting part is formed near the end of the rod body, and a rubber plug is sleeved at the rubber plug limit fitting part, which is characterized in that: The end of the rod body is provided with an asymmetric elastic locking pull-back piece, one side of the asymmetric elastic locking pull-back piece forms a 1-178 degree angle A with the symmetrical center line of the rod body, and the other side of the asymmetric elastic locking pull-back piece and The symmetrical center line of the rod body forms an included angle B of 1 degree to 178 degrees. The asymmetric elastic pullback lock of the product is a plastic barb body. The plastic barb body adopts the design principle of the asymmetry and the elastic body structure. The specific angle and size design make the barb body have an elastic buffering and locking function. The product is easy to use and operate, and the working state is stable. The asymmetrical elastic pull-back piece at the end of the core rod and the inner cavity of the needle seat have an excellent locking effect. The overall structure of the product is reasonable, the concept is clever, and it is easy to promote and apply.


Yuhuan Shengjiu Mould Co., Ltd. specializes in manufacturing and supplying high-quality Syringe Mould in China. Is China's outstanding medical mold manufacturers and suppliers. For product details and information, please visit: https://www.medicalmould.net