Plastic injection molding is a manufacturing process used to produce parts by injecting molten plastic into a mold. This versatile technique is commonly used for mass production of complex and precise components. The process starts by melting plastic pellets, which are then injected into a mold cavity under high pressure. Once cooled, the plastic solidifies into the desired shape, and the mold opens to eject the finished part. It is widely used in industries like automotive, electronics, medical devices, and consumer goods due to its efficiency, ability to produce intricate designs, and scalability.