Gas-Assisted Injection Molding
Manufacturing process used for parts with hollow sections or cavities. In this process, thermoplastics are heated and injected into a mold. Then, a gas, usually nitrogen, is injected while the plastic is still in its molten state. The nitrogen applies uniform pressure through the part, which displaces the plastic evenly. Kind of like when you’re pouring cake batter evenly in a mold. This pressure also inflates the component, maintaining it in contact with the walls of the mold until it solidifies. The even displacement of the molten plastic eliminates shrinkage and warpage, and generates a stronger and more rigid part.