Injection molding, also known as injection molding with a mold, is a molding method that combines injection and molding characteristics. Its five core elements include pressure, back pressure, temperature, time, and holding pressure and time.

Injection molding occupies an important position in the manufacturing industry with its significant advantages. It features fast production speed, high efficiency, and easy automation of operations. At the same time, it can produce products with a wide range of colors and varieties, diverse shapes, precise dimensions, from simple to complex, and from large to small sizes. Additionally, injection molding facilitates product updates and is particularly suitable for the mass production of complex-shaped products, making it a commonly used manufacturing process for plastic parts.

In the injection molding process, plastic is melted in an injection molding machine and then injected into a mold to cool and solidify into the final product. The products manufactured using this method vary greatly in size, complexity, and application. Plastic housings are a typical application of injection molding. They are thin-walled shells often designed with many ribs and protrusions internally for structural reinforcement. These housings are widely used in household appliances, consumer electronics, power tools, and automotive dashboards. Furthermore, injection molding is commonly used to produce various open containers, such as buckets, and other thin-walled products.

Injection molding is also widely used in the manufacturing of daily household items such as toothbrushes or small plastic toys. In the medical equipment field, components like valves and syringes are often manufactured using the injection molding process. Injection molding is favored mainly due to its advantages: the ability to form complex shapes and details, good surface finish, high productivity, low labor costs, and recyclability of waste materials. However, it also presents some challenges, such as difficulties in processing thin-walled parts, high costs of tools and equipment, and longer delivery times.