Gas-Assisted plastic parts design

Gas Assist Injection Molding is a low-pressure process utilizing nitrogen gas to apply uniform pressure throughout the molded plastic part.

By displacing molten plastic from thicker sections of the part toward areas in the cavity that are last to fill, nitrogen gas pressure creates channels within the part. Through the gas channels, pressure is transmitted evenly across the part, eliminating warpage, sink marks and internal stress. As a result, reductions in clamp tonnage, cycle time, and part weight are realized while the strength and rigidity of the part is increased. Gas Assist Injection Molding allows molders the freedom to design plastic parts without the restrictions limitations inherent to conventional molding.

Thin wall parts with heavy ribs, bosses and gussets are formed to high standards of flatness without sink marks or long cycle times. Long shapes are produced without multiple drops or hot runner systems, eliminating knit lines and lowering tooling costs. Multiple parts with complex design and differing wall thickness are molded as a single part without defect. Clamp tonnage requirements are dramatically reduced by 50% or more in most gas assist applications.

So far, gas-assisted mold is widely used in the world, such as daily plastic articles for daily use, automotive plastic parts and industrial supplies. Gas assisted injection molding can reduce the consumption of raw material for the customer, improve the product surface quality and reduce the ordinary injection molding products for the shrink mark of wall thickness queen mother etc.

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