Roto moulding product design
Roto moulding, also known as rotational moulding, is a unique manufacturing process for creating hollow plastic parts. Unlike other plastic moulding techniques like injection moulding or blow moulding, roto moulding operates at low pressure and involves a heated mould that rotates biaxially (on two axes) to evenly distribute molten plastic against the mould walls.
⚙️ Roto Moulding Overview
The Roto Moulding Process (Typically Four Stages)
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- Loading: A precise amount of polymer is loaded into a mould.
- Heating: Mould rotates in an oven, melting polymer uniformly.
- Cooling: Controlled cooling solidifies the part.
- Demoulding: Mould opens and part is removed.
Key Advantages of Roto Moulding
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- Design flexibility
- Consistent wall thickness
- Low tooling cost
- Durable + Impact resistant
- Large part capability
Limitations of Roto Moulding
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- Long cycle times
- Limited materials
- Higher powder cost
- Lower precision
Common Applications of Roto Moulding
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- Tanks & Containers
- Automotive parts
- Marine & Agriculture items
- Playground equipment
Materials Used in Roto Moulding
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- LLDPE
- HDPE
- MDPE
- PP
- Nylon & PVC
In Conclusion
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Roto moulding is a durable and cost-effective process for making large, hollow plastic products.