The gas-assisted injection molding is a process that involves the traditional, low-pressure process of injection molding. This process uses pressurized nitrogen gas to force material into a mold. Let’s find out more about gas-assisted injection molding.
Basically, this process is used to produce big parts of plastic using complex designs and beautiful surface finishes. Normally, this process is a great choice for making skins, cabinets, bezels, doors, equipment covers, and handles.
As said earlier, this process injects pressurized nitrogen gas into a mold. Actually the nitrogen gas is passed through the gas channels for displacing the material through the creation of hollow sections.
The molten resin is pushed against the wall of the cavity until the solidification of the path. The constant pressure of the gas prevents the shrinkage of the part. In addition, it reduces internal factors, sink marks, and surface blemishes. So, this process can work well to hold curvatures and tight dimensions.
In this type of injection molding, the material is pushed into the mold. However, the gas is pushed in a very thin layer between the mold core and the back surface of the component. So the front surface of the component is forced against the other side of the cavity of the mold. as the gas cools down, different sides of the component replicate the mold surface.
Basically, this process is suitable for plastic parts that feature large surface areas, especially those parts that require beautiful surface and detailed textures. In this process, the sink and warp marks are removed because in nitrogen gas maintains the material condition.
Just like internal gas assist, the bosses and support ribs are molded into the component and produce the same level of tolerance and dimensional stability. In the same way, molding pressure produces less stress wear and tear.
Cost Considerations
This process also helps save a lot of money. Typically, these processes require a lot less force than traditional injection molding. Therefor it helps reduce the component chords costs and produces less stress as well.
Actually, the mold pressure results in reduced wear and tear. Therefore, there would be less demand for pricey aluminum tooling. Moreover, the parts made are lightweight which will help reduce the freight expenses and boost material handling.
Design Benefits
Moreover, this technology results in a lot of performance and design benefits. For example, multiple parts with different thickness off walls can be molded.
Converting different components to Gas Assist
This type of injection molding is a better alternative to the large metal parts. Therefore, it is possible to eliminate expensive, heavyweight, corrosive components like panels, access doors, enclosures hand covers.
In short, this was a brief introduction to gas-assisted injection molding. Hopefully, this article will help you understand the concept much better.
Resource box: This article is originally posted in https://www.injectionmouldchina.com.