A brief report for extrusion and types will help you a lot

1. EXTRUSION
PRESENTED BY:
MOHANAD
FAEK NOORI

2. EXTRUSION
Introduction
Extrusion is a bulk forming process in which the material is made to
flow using high pressure. The deformation takes places mainly at room
temperature -cold extrusion - as by this means plate-finished
workpieces with close dimensional accuracy are obtained. The billets
are only heated to forging temperature - hot extrusion .
Fig. (1_a) Extrusion process

3. CLASSIFICATION OF EXTRUSION PROCESSES
ExtrusionExtrusion
ByBy
DirectionDirection
ByBy
EquipmentEquipment
By OperatingBy Operating
TemperatureTemperature
Indirect /Indirect /
BackwarBackwar
dd
DirectDirect
//
ForwarForwar
dd
HotHot ColdCold
HorizontHorizont
alal
VerticaVertica
ll

4. Advantages
• Low Tooling Costs
• Design and Change Flexibility
• Good Quality
• Minimal wasted material
Disadvantages
• Limited complexity of parts
• Uniform cross-sectional shape only
Fig. (1_b) Extrusion process

5. Fig. (3) indirect Extrusion
Indirect Extrusion
he hollow ram containing the die is
kept stationary and the container
with the billet is caused to move.
Friction at the die only (no relative
movement at the container wall)
requires roughly constant
pressure.
Direct Extrusion
The metal billet is placed in a
container and driven through the die
by the ram. Friction is at the die and
container wall requires higher
pressure than indirect extrusion.
Fig. (3) direct Extrusion

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7. IMPACT EXTRUSION
• A manufacturing process in which a small shot of solid material is
placed in the die and is impacted by a ram, which causes cold flow
in the material.
• It may be either direct or indirect extrusion and it is usually
performed on a high- speed mechanical press.
Fig. (4) Impact Extrusion

8. HYDROSTATIC EXTRUSION
Hydrostatic extrusion is actually a form of direct extrusion. The liquid
applies pressure to all surfaces of the work billet. When the ram moves
forward, it is the force from the incompressible fluid that pushes the
work through the die, extruding the metal part.
Fig. (5) Hydrostatic Extrusion

9. what is the type of the extrusion process?

10. what is the type of the extrusion process?

11. what is the type of the extrusion process?

12. References:
1. 1." Fundamental principles" W. Dahl, R. Kopp, O. Pawelski, Umformtechnik,
Plastomechanik und Werkstoffkunde, Verlag Stahleisen GmbH, Düsseldorf
(1993)
2. A.F. Castle, Temperature Control in Aluminum Extrusion, Proc.Fifth
International Aluminum Extrusion Technology Seminar, Aluminum Extruders
Council and the Aluminum Associations,Inc.,1992
3. K. Lange, Ed., Fundamentals of Extrusion and Drawing and Cold and Warm
Extrusion, in Handbook of Metal Forming, McGraw-Hill, 1985
4. "forging and forming",Handbook volume 1
5. " Fundamentals of Extrusion“
6. W. Johnson , ‘’ engineering plasticity’’ , book ,1980.

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