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US 2008/0075969 A1Published application
Extrusion billet and method for heating an extrusion billet in a pusher-type furnace
AssigneeWieland-Werke AG
InventorsAli Aydin, Hans-Peter Hoehe, Leszek Poletek, Florian Schopper
Life of this patent
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Abstract
The invention relates to an extrusion billet having two end sides, characterized in that the surface of at least one end side has a three-dimensional topography which is composed of a substantially planar end side face from which local elevations protrude.
Claims10
Extrusion billet (1) having two end sides (2), characterized in that the surface of at least one end side (2) has a three-dimensional topography which is composed of a substantially planar end side face from which local elevations protrude.
Method for heating extrusion billets (1) in a pusher-type furnace, characterized
- in that at least one end side (2), which comes into contact with the in each case adjacent extrusion billet (1), has a three-dimensional topography which is composed of a substantially planar end side face from which local elevations (4, 5, 6, 7) protrude, with the common contact face being so small that, in the case of a cohesive connection being generated by the heating, the extrusion billet (1) which emerges at the exit-side end of the furnace can, with little force expenditure, be separated from the adherent adjacent extrusion billet (1) by means of a separating device or even by means of its own weight.
Dependencies are inferred from the claim text.