What is injection mold composed of?

Posted on :March 8,2024 By  GREFEE

Injection molding is an important part of modern plastic manufacturing industry. While, injection mold is the key part of it, and the quality of the mold directly affects the product quality and production rate. Therefore, understand the components of mold is helpful in increasing production rate and improving product quality. We gonna talk about the major components of injection mold.

1. Mold frame

Mold frame is the basic structure of injection molds, including upper and lower plates, guide pillars, guide sleeves, and other parts. The main function of the mold frame is to support and locate other components of the mold to ensure its stability and accuracy during the injection molding process. The design and manufacturing of the mold frame must take the rigidity and strength into consideration to withstand the high pressure during the injection molding process.

2. Mold cavity

NMold cavity is the key part of the plastic product forming mold. it is composed of lower die and male die. The shape of the die and punch determines the shape of the final product. In order to ensure product quality, the design and manufacturing requirements of the mold cavity are extremely high, and its size, shape, and surface roughness need to be precisely controlled.

3. Gating system

Gating system is the part of an injection mold used to guide molten plastic into the mold cavity, including the sprue, runner, gate, and cold well. The flow characteristics of plastics should be taken into consideration in designing gating system to achieve smooth mold filling and reduce the occurrence of defects. The structure and size of the gating system have a significant impact on the quality and production efficiency of the product.

4. Cooling system

Cooling system is the part used to control the mold temperature for injection mold, including cooling pipes, cooling parts, etc. To ensure the stability and uniformity of mold temperature, the design of the cooling system should according to optimization of the shape, size and thermal performance of products to improve the product quality and production rate.

5. Ejection system

Ejection system is part of product ejected from the cavity of injection mold, including top rod, top plate, reset mechanism, etc. The design of the ejection system must fully consider the shape, size, and production efficiency of the product, then realize stable and fast product ejection. At the same time, good reset performance is also necessary to ensure the stability and accuracy of continuous production.

6. Exhaust system

The exhaust system is the part of the injection mold used to expel gas from the mold cavity, including exhaust slots, exhaust holes, etc. During the process of plastic melting and filling, it is necessary to promptly discharge the gas inside the mold cavity to avoid defects. For example, pores in products. The design of the exhaust system needs to be optimized based on the structure of the cavity and the characteristics of the plastic to ensure a good exhaust effect.

Conclusion:

The components of injection molding die include mold frame, mold cavity, gating system, cooling system, ejection system and exhaust system. The mold frame is the basic structure of mold used to support and locate other components. Mold cavity is the key part used for forming plastic products, which is composed of lower die and male die. The gating system leads melting plastic into the cavity and cooling system controls mold temperature to improve product quality and increase production rate. Ejection system ejects the product out of cavity and exhaust system used to get rid of the air produced during the injection molding process. Understand these elements will be largely benefit for improving the production and quality.

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