Dies
Hollow dies or solid dies
The dies are divided into two groups, those for solid extrusions and those for hollow extrusions. The dies for solid extrusions consist of a flat plate which forms the external shape of the extrusion. The dies for hollow extrusions consist of two parts where the aluminium flows through the ports and then rewelds as it flows over the mandrel during pressing. The other die part creates the extrusion’s outside surface.
Up to eight extrusions – depending on the size – can be pressed in multi-cavity dies. The dies are made of high temperature resistant steel and the die’s opening is made by wire erosion in CNC controlled machines.
The cost of dies is significantly lower than the tools used for conventional building materials and methods of production. The costs vary with the size and type of extrusion. Low die costs also make the extrusion technique interesting for the production of trials and prototypes.
|
