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Injection molding is a manufacturing process commonly used to manufacture items such as plastic toys, small accessories, auto parts, and mobile phones. Almost everything we use in our daily life is a by-product of the injection molding process.
The process involves the use of injection molding machines, and the materials used are thermoset or thermoplastic. In this process, the material is heated, melted and then placed in the mold cavity. The material is then allowed to cool down and finally ejected. The whole process includes the following 4 steps:
1. Clamping: The mold used for the process is divided into two halves. In this step, the two halves are clamped using a hydraulic clamping unit. One half of the mold is fixed on the injection molding machine, while the other half is allowed to slide. The clamping unit pushes the mold half and applies sufficient force to fix it during the injection of the material. The required clamping force is directly related to the performance of the resin and the injection pressure required to fill the cavity. Thicker resins have a low flow rate and require high pressure to discharge. However, thin resin has a high flow rate and therefore requires a smaller pressure.
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