Hartley reported
a technique developed by GKN Technology in UK for
the pressurised solidification of Al alloy in reusable
dies. In this process a die set is placed on a hydraulic press
and preheated, and the exact amount of molten alloy is
poured into the lower half of the open die set, the press
closed so that the alloy flls the cavity and the pressure
maintained until complete solidification occurs (31±
108 MPa pressure).