 |
|
|
|
|
|
|
|
|
|
||
|
|||||||||||
|
|||||||||||
| Extrusion
is a process in which a metal or some other material is forced through
a die to form a material with a desired cross-sectional shape. If extrusion
is in only one direction (direct extrusion or indirect extrusion as shown
below) the material has a uniform cross-sectional shape along its length.
The forward and backward extrusion processes also shown can produce small
parts with a three-dimensional profile.
The materials for extrusion must be ductile at the extrusion temperature and include metals, thermoplastics, and elastomers. Extrusion may be used to produce 'green' shapes for ceramic materials that are then sintered after forming. |
|||||||||||
 |
|||||||||||
| From:
Edwards and Endean,
"Manufacturing with Materials," Butterworth-Heinmann (1990) |
|||||||||||