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New molding technologies, together with a revolution in thinking about how to design and manufacture products, have merged to open exciting new possibilities in polymer part manufacturing. The new technologies offer versatile, cost-effective forms of materials and more unified, efficient production methods. In gas-assisted injection molding, nitrogen gas under high pressure is injected through the nozzle or mold wall into plastic partially filling a mold. The gas flows preferentially through local thick sections with hot interiors and pushes the plastic ahead to fill the mold.