Low Pressure Mold
Low pressure mold Capability Low pressure injection mold Structural foaming mold Structural Foam Molding Technology Structural foam molding is a low pressure injection molding process where an inert gas is introduced into melted polymer for the purpose of reducing density and weight of the...
Low pressure mold
Low pressure injection mold
Structural foaming mold
Structural Foam Molding Technology
Structural foam molding is a low pressure injection molding process where an inert gas is introduced into melted polymer for the purpose of reducing density and weight of the finished product while increasing the strength. The lower pressure and forces involved allow more economical molding equipment and tooling to be utilized resulting the mass production of very large or parts or multiple parts being produced on a single machine in a single cycle at a lower cost than conventional injection molding.
The structural foam molding process utilizes a molten resin that has been injected with nitrogen gas or a chemical blowing agent. This mixture is injected into the mold, where the gas expands and fills the mold with foam. As the foam flows through the mold, the surface cells collapse. Solid skins are formed against the walls of the mold, while the core of the part remains structurally foamed. Because the outer skin is solid and the center of the wall is foam, the part weight is reduced up to 20%.
Structural foam yields parts that are larger and sturdier than injection molding. The process pressures are much lower than in injection molding, thereby producing parts that are structurally sound, nearly stress-free and have minimal warpage. Parts made are thicker and sturdier than with other processes (doubling the parts' thickness yields parts up to eight times stiffer).
KEY BENEFITS OF THE STRUCTURAL FOAM INJECTION MOLDING PROCESS
Part weight reduced 10% to 30%
Increased strength and stiffness due to honeycomb structure
Capable of molding large, complex parts without sink marks
Capable of molding parts. 500 inches thick or greater
Parts may weigh up to several hundred pounds
HIGHEST STRENGTH-TO-WEIGHT RATIO compared to alternative manufacturing methods and materials.
Can replace concrete, sheet metal, metal castings, wood, fiberglass, rotational molding and blow molding in a variety of applications
Superior impact resistance