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US 10,537,924 B2Granted
Extrusion press for producing flat sheets
OwnerUlrich Bruhnkeinventor
Life of this patent
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Abstract
An extrusion press for producing flat metal sheets from hollow sections made of magnesium or magnesium alloys, comprising a mandrel head protruding into the die opening of an extrusion tool, wherein the mandrel head (7) of the mandrel (5) is disposed so as to protrude from the outside into the opening of the die, and the mandrel head (7) has a conical design.
Claims6
An extrusion press for producing flat metal sheets from hollow sections made of magnesium or magnesium alloys, comprising:
- a frame;
- a container configured to receive a round billet;
- a die having a cylindrical inner surface;
- and
- a cylindrical mandrel having a conical mandrel head with a pointed tip at one end and an end region opposite the conical mandrel head, the mandrel being disposed so as to be held at its end region by the frame with the mandrel protruding from outside through an opening of the die such that the conical mandrel head is arranged entirely inside the container axially spaced inwardly of the die,
- wherein a flat metal sheet is formed by pressing the round billet through an elongated hollow cylindrical gap formed between the cylindrical inner surface of the die and a cylindrical portion of the mandrel, axially spaced behind the conical mandrel head, to form a tubular hollow section and subsequently by forming the tubular hollow section into the flat metal sheet, and
- wherein material of the round billet flows along the conical mandrel head towards the gap.
4 more elements
Dependencies are inferred from the claim text.