Technology

QUALITY | ROTATIONAL MOULDING

Rotational moulding offers a great deal of freedom in design and has fewer restrictions than other processes used for the manufacture of plastic parts. It can be used to produce open or closed items with dimensions that can start from diameters as small as 25-50 mm. The shapes can be simple (spheres, containers) or complex (fuel tanks, automotive components). Parts can be moulded with thicknesses starting from 1.0 mm up to 50mm. The parts may be coloured or transparent, flexible or rigid. Rotational moulding is suitable for small production runs, but it can be used for the production of 50,000 – 100,000 parts/year. Above these values a more automated process should be considered. However, in cases where the rotational moulding is the only viable process, higher production outputs can be obtained using multiple moulds and machines.

STRENGHT

There are basically two ways to increase the strength of a part:

 

  • increase the quantity of plastic material (therefore thicknesses and costs)
  • use stiffening ribs for reinforcement, that increase the stiffness of the part whilst still keeping an even wall thickness.

 

 

 

 

 

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