industry plastic parts Gas Assisted Injection Mould
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industry plastic parts Gas Assisted Injection Mould
The gas injection technique (GIT) is a special injection molding method. After the actual injection molding operation a permanent cavity is created in the molding as a second step by means of an inert compressed gas (nitrogen). The plastic is pressed against the mold wall by maintaining the gas pressure during the solidification process, thus defining the external contour of the component.
Advantageous | Disadvantageous |
‐ Lower clamping force ‐ Lower pressure drop ‐ Simpler and cheaper moulds ‐ Lower part weight (reduction up to 40%) ‐ Fewer skin marks ‐ Less warpage ‐ More design freedom with non‐uniform wall thicknesses
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‐ Extra equipment ‐ Special nozzle design/gas‐injection needles ‐ Increased shrinkage in the direction of gas channel flow
‐ Material properties usually lower than in equivalent parts made by conventional injection moulding |
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