Gas-assisted injection molding (GAIM) is a process where an inert gas is injected into an injection molded part during the filling stage. The process utilizes compressed gas as the “packing medium”, which provides mechanical strength and dimensional stability for thick molded parts, and eliminates warpage and sink marks of products caused by pressure variation and residual stress. In GAIM, plastic products are molded under lower injection pressure with less material, which benefits companies on energy and weight savings.

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For GAIM, gas control becomes the main challenge due to the distinct properties and resistances of gas and plastic flows. Moldex3D GAIM provides tools to simulate gas injected into cavities through either melt entrances or any specific gas entrances. The 3D model enables users to visualize gas penetration inside the mold cavity and further to optimize the part/mold design and process settings.