Until the plastic has hardened, the foam injected into the mould continues to expand.
This means the internal pressure on the cooling plastic is evenly distributed, reducing the internal stress in the finished product.
Advantages of structural foam moulding:
- Reduced risk of deformation
- Thicker walls possible
- More options for walls with different thicknesses
- Greater freedom in terms of design compared with high-pressure injection moulding
Common product wall thicknesses:
Points to consider with structural foam moulding:
- ‘Foamed’ finish
- May be necessary to paint the product