Manufacturing process used for shaping of a material through compression process to get the required cross-sectional shape.
Example of extrusion parts:
1)Railing for sliding doors
Keeping the process temperature to above the re-crystalline temperature (for steels temperature between 400 and 700 degree). As temperature is so high so controlling the cooling is a problem.
It can defined as the process of shaping a cold metal by striking slug. Often used to produce discrete parts.
Ram apply force on work billet to move forward to pass through the die opening and to get the desired shape.
Metal is forced to flow through the die in an opposite direction to the ram’s motion.
The chamber which is larger than the billet is filled with the fluid. The fluid is compressed with the ram and pushes the billet forward.
Common materials used in extrusion are following
Advantage of Hot and Cold Extrusion
1)Large variety of materials
2)Less forces required
3)Better material flow
1)Better mechanical properties due to work hardening
2)Good dimensional tolerances
3)No need to heat billet
-Stress Strain Diagram