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Plastic injection mold: an essential tool for modern industry

Date: 2024-7-31
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As an indispensable tool in modern industrial production, plastic injection mold plays an important role in the field of plastic product manufacturing. Injection molds are widely used in various industries, including daily necessities, electronic products, medical equipment, automotive industry, toy manufacturing and other fields, by injecting molten plastic material into the mold, pressurizing and cooling it to form products of the desired shape.

Plastic injection mold: an essential tool for modern industry

Plastic injection mold: an essential tool for modern industry

Basic structure and operation of injection molds

Injection molds usually consist of mold base, mold core, mold cavity, cooling system, ejection system and other parts. The mold base is the basic part of the mold, usually made of steel plate, which supports the weight of the entire mold and the pressure during the injection molding process. The mold core is the movable part inside the mold, which is used to form the internal structure of the product; while the mold cavity is the fixed part inside the mold, which is used to form the appearance of the product. The cooling system is used to cool the mold and plastic during the injection molding process to ensure dimensional accuracy and surface quality of the product. The ejection system is responsible for removing the molded product from the mold.

The injection molding workflow typically includes mold preparation, raw material preparation, mold installation, machine preparation, mold testing and troubleshooting, production operation, quality control, and mold maintenance. These links are closely interrelated, and any negligence in any one step can affect the quality of the final product.

Technical features of injection molds

The manufacturing technology of injection molds has the advantages of high precision, high processing efficiency and long service life. The manufacturing process of modern injection molds involves complex machining and precise assembly technology to ensure the accuracy and stability of the mold. For example, the cavity and core of the mold must be processed into complex three-dimensional surfaces, which are difficult to process and require workers with high technical skills and advanced equipment.

Plastic injection mold: an essential tool for modern industry

Injection molds are also required to have high precision and surface quality. Generally speaking, the dimensional accuracy requirements of plastic parts are IT6-7, and the surface roughness is Ra0.2-0.1μm. The dimensional accuracy requirements of the corresponding injection molded parts are IT5-6, and the surface roughness is Ra0.1μm or less. This high precision requirement not only ensures the dimensional accuracy of the product, but also improves the appearance quality of the product.

In addition, the service life of the injection mold is also one of the important indicators to measure its quality. Long-life injection molds are essential for improving production efficiency and reducing costs. At present, the service life of injection molds is generally required to reach more than 1 million times, which requires the use of high-strength and high-wear-resistant materials in the design and manufacturing process of the mold, and the reasonable structural design and optimization.

In summary, as an important tool in modern industrial production, the manufacturing technology of injection molds continues to develop and advance, and the application field continues to expand. Through reasonable design, manufacture and maintenance, injection molds will continue to provide strong support for the development of various industries.

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