What are the basic knowledge of plastic mold design?

What are the basic knowledge of plastic mold design?

Plastic mold design is a crucial part of the injection molding process, which directly affects the quality and production efficiency of the final product. Below I will introduce the basic knowledge of plastic mold design in detail.

First of all, plastic mold design needs to consider the following aspects:

1, product design: Before plastic mold design, we first need to understand the design requirements of the plastic products needed to be manufactured. This includes product size, shape, structure and other aspects of the requirements. According to product design requirements, determine the structure and size of the mold.

2, material selection: according to the material characteristics of the product and the use of requirements, choose the appropriate plastic material. Different plastic materials have different melting temperature, fluidity and shrinkage characteristics, which will directly affect the design and manufacture of molds.

3, mold structure design: mold structure design is the core part of plastic mold design. It includes the design of mold base, mold core, mold cavity, ejecting mechanism and other components. The mold base is the support part of the mold, and the mold core and the mold cavity are the cavity part that forms the product. Ejector mechanism is used to ejector the injection product from the mold. In the design process, it is necessary to consider the shape, size and structural requirements of the product, as well as the characteristics of the injection molding process.

4, cooling system design: The design of the cooling system is crucial to the performance and production efficiency of the plastic mold. Reasonable cooling system design can improve the cycle time of injection molding, reduce product deformation and shrinkage and other problems. The cooling system usually includes a cooling water channel and a cooling nozzle, which need to be arranged and designed according to the shape and size of the product.

5, exhaust system design: in the injection process, the air will be squeezed into the mold, if not discharged in time, will lead to bubbles or defects on the surface of the product. Therefore, it is necessary to design a suitable exhaust system to ensure that the air inside the mold can be smoothly discharged.

6, the choice of mold materials: the choice of mold materials directly affects the service life of the mold and manufacturing costs. Common mold materials are steel and aluminum alloy. Steel has high hardness and wear resistance, suitable for mass production; The aluminum alloy has lower cost and processing difficulty, and is suitable for small batch production.

To sum up, plastic mold design is a key link in the injection molding process, it needs to consider product design, material selection, mold structure design, cooling system design, exhaust system design and mold material selection and other factors. Reasonable mold design can improve production efficiency, reduce manufacturing costs, and ensure the quality of the final product.