Hot-moulding has come into being to
resolve the problem of the limited use of the sheets in the design and
to give an improved surface as well as a guarantee on the final
dimensions. These objectives have been reached but the cost of the
product is still very high. For this reason, the suppliers of this
technology have recently considered the combination of injection/hot-moulding.
Injection is used for the construction of the EVA profile piece, which
is a manufactured article having more or less the same dimension as
the end product.
This system requires less labour with
respect to the traditional system and there is a limited waste (less
than 10%). A good dimension control is achieved, with a good
reproduction of the design. However, the problem of costs is not
resolved: they remain high and the technical characteristics are
inferior in respect of the injection method.