Adopted manual gear core-pulling and the moving insert block core-pulling .

According the structure characteristics of the watering pot,analyzed the process of plastic molding,designed injection mold,used of the gear side core-pulling mechanism in mold structure,stated the injection mold structure design and working process.

Screw thread forming is the critical procedure, the parting mold mechanism and demoulding mode of mold are introduced, by gear mold core, using gear transmission to drive the running of gear mold core so as to realize parting mold, demoulding is performed by crew thread transmission.

Forging process design of DJ4 locomotive gear hub billet directed by Superform;

The core pulling structure of the mold was introduced in detail,and the drawing-core force and slanting pillar were checked.

If the casting is taken out from the moving die, long distance core pulling is needed according to the shape of the casting, so the mechanism of the sliding block which rotates midway was designed.

Because the casting needs three direction core pulling,in order to keep the core pulling f.

Development of injection mould with core-pulling mechanism in fixed half for mobile phone front shell;

Design of mould with multiway internal and external core-pulling for mouse shell

Through analyzing the characteristics of the plastic structure, a simple core-pulling structure was designed, solved the diffcult points of demould the inside hole .