GAIN

Gas assisted injection moulding (GAIN) is a manufacturing process that uses nitrogen gas to void thick sections of plastic products (examples: tool handles, long shafts, frames).
The process calls for nitrogen gas to be injected immediately following injection of the plastic. The gas will travel through the centre of the mould cavity to displace any residual liquid plastic. With an applied pressure, the plastic will then coat the mould cavity. Once the gas is evacuated, the resulting part is structurally solid and aesthetically compliant to the moulding requirements with a hollow core.

The advantages to this process are:

• Reduce / eliminate potential aesthetic surface defects caused by material shrinking
• Reduce the production cycle time while ensuring a better adhesion of the plastic to the mould cavity
• Produce a rigid product without augmenting the part weight