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Why Choose Rotomoulding?
An ever-increasing awareness of the rotational moulding process has led designers to choose this process for some quite complex parts. Relative to blow moulding, rotational moulding permits much more complex, asymmetrical shapes. Wall thickness distribution is more uniform with rotomoulding and part size can go well beyond anything which is possible with blow moulding. Relative to injection moulding, rotational moulding has major advantages of low mould cost and the ability to produce complex hollow articles.
The main advantages and disadvantages of the rotomoulding process are as follows:
Advantages:
- Tooling costs are relatively low when compared to other processes. This is mainly due to the fact that rotational moulding is a low pressure process meaning high strength moulds are not needed.
- Moulds which differ greatly in shape and size can be can be run simultaneously on the same equipment.
- Wall thickness uniformity is good when compared to blow moulding or thermoforming.
- Finished parts can be virtually stress free if designed carefully.
- The process is extremely versatile. Parts can be manufactured with inserts moulded in and surface textures and effects reproduced with relative ease.
- Using automated oil heated Leonardo machines, Rototek can now deliver large production runs economically having virtually eliminated the labour content.
Disadvantages:
- Materials costs are relatively high since powder must be ground from pellets in order to be used. This stage adds significantly to the cost of producing material for rotational moulding.
- The normal process is not suited to large production runs of small parts. The heating of the mould up to a relatively high temperature and subsequent cooling results in long cycle times.
- Loading and unloading of moulds is labour intensive. Especially for complex parts.
Rototek Limited Office and Factory
Sylvan Way, Off Great North Road, Newark. NG24 3UT.
Email: enquiries@rototek.com Tel: 01636 611959 Fax: 01636 707369
Registered in England No: 2777384