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Old 15-04-19, 09:24 AM
Neibelungen Neibelungen is offline
Join Date: Nov 2011
Posts: 239

From a manufacturing perspective, it's unlikely that the finished stock for sliders is extruded.
Rather, the raw square or round bar stock is initially extruded (pushed under extreme presure of about 250 to 1000 tons while in a red hot state through a conforming die).
It would then be anealed and set through either a rolling mill to dimension it (or flatten if round stock) before being sent through a draw plate if a precise profile or dimensional shape was required.

Typically complex 3d shapes like H beams or 'L' section are extruded directly to finished shape, the rest would be produced as round or rectangular bar which would be processes in a far less demanding (force and temperature) method.
Rolling mills can work with long straight length or continious coil, and apart from annealing, don't require complex hydraulic forces as the mechanical force is basically compressive screw pressure and the rolling action provides the mechanical power to move the object through.
Draw benches can be hand or mechanical power and are graduated down to size reducing the force required to relatively small steps.
final stock material would be in long strips or coils and these would then pass through a cropping machine (usually onsite or subcontracted) to produce end profiles (round on one side and flat on the other side of the blanking die) on half of each part. As it progresses, the flat finishes the previous piece and the round crops the start of the next.

Blanking would require much more force and leave a rim and a lot more waste material, but could work with wider stock, cropping them horizontally across a strip, either individually or as a gang.
End bending can be built into the cropping or blanking dies or a simply jig in a fly press to put the bend into a fixed position.
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