Extrusion Process. Extrusion Process. Extrusion is a process that forces metal or plastic to flow through a shaped opening die. The material is plastically deformed under the compression in the die cavity. The process can be carried out hot or cold depending on the ductility of the material. .
Extrusion is a process that forces metal or plastic to flow through a shaped opening die. The material is plastically deformed under the compression in the die cavity. The process can be carried out hot or cold depending on the ductility of the material.
The tooling cost and setup is expensive forthe extrusion process, but the actual manufactured part cost is inexpensive when produced in significant quantities.
Materials that can be extrudes are aluminum, copper, steel, magnesium, and plastics. Aluminum, copper and plastics are mostsuitable for extrusion.
Aluminium is particularly good for manufacturing complex parts with multiple features, which can help reduce costs through easier assembly and a lower number of parts.
An extruded aluminium sunroof channel
Extruded aluminium roof rails.
Side intrusion beams made from extruded aluminium
The cross section of the extrusion can be tailored-made for a relatively small cost
Circumscribing Circle Diameter (CCD): smallest diameter circle into which the extruded cross section will fit.Extrusion - Design Consideration
The minimum wall thickness which can be extruded for aluminum is dependent of the particular shape, and the smallest circumscribed circle as well as the alloy.
Standard industry tolerances usually provide adequate precision for most applications
Limit irregular shapes, sharp corners, and very thin sections.
Avoid thin walls sections
Commonly specified minimum wall thicknesses include:
Aluminum 1 mm
Carbon steels 3 mm
Stainless Steel 5 mm