Gas assist is an innovative and cost-saving process used to help reduce material weight and sink marks in thicker areas of part, creating a more uniform surface and a more cost-effective product.
•Injects fixed quantity of material into mold
•Hollows product to reduce weight and assist the fluidity of material
•Nitrogen pressure holding as material cools and retracts, nitrogen undergoes secondary penetration to prevent sinking or springback
•Release of high-pressure nitrogen releasing nitrogen back into mold cavity
Advantages
•Reduces resin quantity
•Improved surface quality
•Shorten molding cycle
Limitations
•Pre-existing mold limitations
•Filled resin issues