Complex shapes

Rotational moulding permits the production of articles with complex geometry, curved edges, and rounded shapes in a single cycle, processing materials of different colour and transparency to produce particular aesthetical effects using a single mould. This is why designers, once they understand the basic principles and potentials of the technology, not only try to adapt it to products manufactured via other processing methods, but also design specifically for rotational moulding, creating successful products.
Polivinil Rotomachinery, headquartered in Cerano (Novara, Italy), works with designers starting immediately in the post-draft stage. The varying distribution of material in different mould zones, the need for non-uniform thicknesses, and the simultaneous presence of two layers require careful fine tuning of the production recipe, which is significantly facilitated by the latest-generation machines from the Italian company. An example result is the chair shown in the photograph.