Plastic injection molding is a manufacturing process used to produce large volumes of plastic parts with high precision and consistency. It involves melting plastic pellets and injecting the molten material into a mold under high pressure. Once the plastic cools and solidifies, the mold opens to release the finished product. This method is widely used in industries such as automotive, electronics, medical devices, and consumer goods due to its efficiency, scalability, and ability to create complex shapes with tight tolerances.