Forward extrusion is a very basic method, because this extrusion method is simple to operate, relatively flexible, and has a smooth extrusion surface. The technology is relatively mature and widely used in the forming and processing of aluminum and aluminum alloy materials.
What needs to be paid attention to in positive extrusion is that sliding occurs between the aluminum profile blank and the extrusion barrel during extrusion, which will produce a large sliding friction, and this friction is not conducive to the extrusion of aluminum products in most cases. ,
because this will make the moving speed of the aluminum product unstable, resulting in uneven stress on various parts of the aluminum product, and the quality of the final extruded aluminum profile will be uneven; and under the action of friction alone, the machine consumes The energy has increased by as much as 30%-40%; due to the strong friction will generate heat, as the relative speed between the aluminum product extrusion and the die wall will increase, the loss of the die will also increase, and the life will be shortened. will be reduced accordingly.