Process and device for the continuous production of sheet metal strips
AssigneeMannesmann Aktiengesellschaft
InventorsFritz-Peter Pleschiutschnigg, Ingo Von Hagen
Life of this patent
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Abstract
A mother strip with a metallically pure surface is passed through a melt bath of a metal and whereby the coating is smoothed by rolling immediately after leaving the melt bath. The mother strip, having been preheated, to a temperature clearly above ambient temperature, especially above 200.degree. C., is introduced into the metal bath. The preheating is carried out by indirect heat exchange with the melt bath in an oxygen-free environment. The melt freshly supplied to the melt bath has an increased temperature in accordance with the heat lost due to preheating.
Claims25
A process for the continuously producing sheet metal strip, comprising the steps of:
- preheating a mother strip with a metallurgically pure surface to a temperature over 200.degree. C. by indirect heat exchange with a metal melt bath in an oxygen-free environment;
- passing the mother strip through the melt bath;
- supplying fresh molten metal to the melt bath and increasing temperature of the fresh molten metal in accordance with heat loss due to preheating;
- regulating speed of the mother strip as a function of immersion length in the melt bath and temperature of the metal melt for obtaining a desired total thickness of a coating deposited on the surface of the mother strip as crystals and melt;
- and
- smoothing the coating with rollers immediately after leaving the melt bath.
A device for continuously producing sheet metal strip, comprising:
- a melt container having an outer wall;
- a sealing device arranged in a region of the outer wall of the melt container so that a mother strip is passable into and out of the melt container;
- forward transport means for transporting the mother strip in a transport direction;
- rolling means for smoothing a crystallized coating on the mother strip, the sealing device including a substantially cuboid-shaped housing arranged to extend into the melt container in the transport direction of the mother strip, the housing having broad-side walls that run parallel to a plane of the mother strip and are of a refractory-grade material, the broad-side walls being configured to surround the mother strip as radiant heat surfaces and so as to form a through-channel;
- and
- means, attached to the sealing device, for maintaining an oxygen-free atmosphere in a region of the through-channel.
Dependencies are inferred from the claim text.