Brownie's Marine Group Inc (BWMG)

[geodan]

Another industrial app fo L&W, plastic molding.

It used to be slow screw presses to put the plastic into mold, now it is done fast, see below. Another growing app for oil free compressors.


Gas assist high pressure injection molding is a commonly used process to make plastic parts today. It allows parts to be light weight and more sturdy than solidly molded parts. Plastic is injected into the mold followed by high pressure gas to force the plastic to the outside of the mold. The end product is a part that is hollow inside, yet very strong.


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.