Gas Assist Injection Molding is a more advanced type of the traditional injection molding process where, in addition to injecting molten plastic into the mold, nitrogen gas is introduced under controlled high pressure during the molding cycle. Unlike standard injection molding, which fills the entire mold cavity with solid plastic, gas-assist molding uses nitrogen gas to push the molten resin deeper into the mold. This creates a hollow core inside the part, allowing for thicker outer walls while reducing material use and overall weight.
As the resin is heated and injected through runners, gates, and sprues, the low-pressure nitrogen gas is injected through a small tunnel to help the plastic flow more precisely into the mold’s intricate shapes. This results in parts with enhanced surface quality, improved dimensional accuracy, and greater structural strength—especially useful for producing thicker sections and larger components without sacrificing design integrity or durability.
The process is suitable for both small and large-scale products, enabling manufacturers to create lightweight, durable plastic parts efficiently.
There are numerous benefits to using Gas Assist Injection Molding, making it a popular choice for plastic manufacturing in China and beyond. These include, but are not limited to:
The result is a more sustainable production process due to less stress and wear and tear on the tool. Surface texture is improved because with Gas Assisted Injection Molding, sink marks are eliminated. Contact Us today to know how you can increase production output and save on production costs!