indirect extrusion

indirect extrusion

[‚in·də′rekt ik′strü·zhən]
(metallurgy)
An extrusion process in which the billet remains stationary while a hollow die stand forces the die back into the cylinder.
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References in periodicals archive ?
The investment, expected to be completed by April 2016, will include a new casthouse, a new indirect extrusion press line for production of hard alloy bars and profiles, a new drawing line, and a complete refurbishment of an existing extrusion line to meet increased demand for drawn bars.
In case of indirect extrusion (doted line) the draining of the metal is contrary to the direction of the applied force, and force is constant during the pressing.
The indirect extrusion process allows for a more consistent grain structure and better dimensional tolerances, which improves the machinability and finishing of Sapa Rod and Bar products.
Additionally, the indirect extrusion press project at our Port Huron rod mill should be completed by early 1996.