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What to pay attention to when designing bottle cap molds
Edit:Taizhou Huangyan Yige Machinery Co., Ltd.   UpDate:2019-07-09

The design of bottle cap molds is based on the shape, accuracy, size, technical requirements and production batch of plastic parts. When designing the mold, consider the following aspects:

a. Number of cavities and how to place them: Bottle caps are used as packaging containers for large-scale production. One mold and multiple cavities should be selected. Considering the clamping force, injection volume, and accuracy and economic factors of existing injection molding machines, 1 mold and 10 cavities, the cavity placement method is "figure".

b. Gating system design: According to the layout of the plastic part, the mold is designed as a three-plate type with a point gate. The gate is set at the center of the top of the plastic part. The point gate can significantly advance the shear rate of the melt and make the melt viscosity large. In order to lower the mold filling, it is particularly useful for melts that are sensitive to shear rate. And plastic parts are used as packaging containers with high appearance quality requirements and small residual traces at the gate, which can ensure the surface quality of the plastic parts. When the mold is demoulded, the gate is actively broken, which facilitates the initiative of the finished product production process and advances production. Power, increasing economic benefits. The non-equilibrium casting system is used to compact the cavity placement and reduce the mold standard. In order to allow each cavity to overflow in a balanced manner, the selection method is manually adjusted to reach the balance of each cavity gate standard. Use cold pockets to store forward cold stock.

c. Cooling system design: The mold temperature adjustment system of the bottle cap mold directly affects the product quality and production power. For the cooling power of the forward cavity, a cooling circuit is selected. The inlet of one circuit is located adjacent to the outlet of the other circuit. According to the shape of the plastic part and the mold layout constraints, the diameter of the fixed mold cooling water channel is φ12mm, which is connected with the hose outside the mold to form circulating cooling. . The diameter of the moving model core is relatively thin. The steel pipe cooling method is used. A soft copper core rod with good thermal conductivity is pressed in the middle of the core, and one end of the core rod is extended into the cooling water hole to cool.