An Injection of Plastic A precisely designed tool called a mould is used in the injection moulding process to make intricate plastic pieces. Its major parts for shaping, forming, and ejecting plastic components include the mould cavity, core, runner system, sprue, and ejector system. High-strength materials like steel or aluminium, which are selected for their durability and heat resistance, are commonly used to make these moulds. They manufacture parts in a variety of sizes and dimensions and are versatile across industries such as consumer goods, electronics, automotive, medical, and aerospace. High efficiency, accuracy, and scalability are made possible by the injection technique, which guarantees reproducible, reasonably priced production of complex designs.