A key to a perfect extrusion process
lies in proper extrusion tools. For a perfect extrusion operation
Toolmakers, extrusion press manufacturers and the companies that put these
machines to work should share an understanding for desired results. Some of
the parameters on which extrusion equipment are to be evaluated are as
under.
| “Getting it right
since beginning saves time, checks interruptions and leading ultimately
to savings of money.” |
- Tools to meet exactly with the drawings
- Tools suited to long, medium or short production runs
- Minimal production disruptions
- Fewer tool failures
- Minimal wear and tear of extrusion press components
Selecting the Right Extrusion Equipment
Selecting the most appropriate tool for an extrusion job goes a long way
towards its success. In fact for the extrusion equipment, working conditions
are also taken into consideration. Some of the considerations for the
appropriate extrusion equipment includes:
- Position of the component in relation to the hot billet and the
extruded profile that emerges out.
- The pressure applied on the metal being extruded.
- Pressure and temperature to which the equipment are subjected to.
- Resistance to thermal fatigue cracking.
- Good compressive strength especially for dummy blocks.
- Good bending strength when temperatures are high especially for dies
and mandrels.
- Heightened hot yield strength and hot hardness in case of shear
blades.
- High creep strength in case of dummy blocks.
- Excellent temper resistance and resistance to softening at raised
temperatures.
Test for Extrusion
Equipment
A die is exposed to the most severe working conditions. Along with it
liner, dummy block and the mandrel are other parts to experience high
temperatures.
Typical temperatures experienced by these components are:
Aluminium extrusion: 400°–500°C
Copper and copper Alloys: 600°–1100°C
Stainless steel: 1100°–1250° C |
Types of Extrusion Equipment
Components of the extruder hardware can be divided in to the following
systems as described in this image.
Some of the major extrusion tools as part of the above extruder hardware
system is described here.
