This unique design was patented by the CSIR. Scientists were
required to build a scale model of this 60 ton wave breaker. The
product has a unique way of interlocking when packed. Several similar
wave beakers are used to calm stormy seas and stabilize the swells in the
local South African harbors. The material selction played a big role
in this scaled model. As water was the testing medium, the scaled
dolos needed to be made by a material with same density as concrete.
A special material, mixture of PP and Bauxite was compounded to obtain
the correct density. Scale models 1 : 1 000 000 were requested of
several designs and volumes.
Several dies were made to cater for about five different items.
Two mould bases were used with several cavities. The rotating sprewbush
was used to select the cavity that will be used in the injection moulding
process. The moulds were designed to fit a small Ankerwerke Injection
moulding machine.
We played an integral role in assisting the scientists to perform their
scale model research.