Method for multiple casting of metal strands

Patent metadata

Field	Value
Publication number	US-10549340-B2
Application number	US-201916362374-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Sep 27, 2016
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A method for the continuous casting of metal strands. The liquid metal is simultaneously cast via a moulds into metal strands. The moulds each have a narrow side and a broad side. The moulds have a uniform narrow side so that the metal strands have equal thicknesses after casting. At least one of the moulds used has a broad side whose length differs from the length of the broad side of the other simultaneously used moulds. For each mould used, a sprue stone is provided, which is arranged on a casting table and is provided for receiving the starter strands. The casting of the metal strands includes a mould filling phase with a fixed casting table in which a plurality of starter strands is cast into the associated sprue stones. The casting includes a continuous casting phase in which the casting table is lowered and metal strands are cast.

First claim

The invention claimed is:

1. A method for the continuous casting of metal strands, including rolling ingots made of aluminium or an aluminium alloy, in which
the liquid metal is simultaneously cast via a plurality of moulds into a plurality of metal strands,
the moulds each have a narrow side and a broad side, wherein all moulds have a uniform length of the narrow side, so that the metal strands have equal thicknesses after casting,
at least one of the moulds used has a broad side, whose length differs from the length of the broad side of the other simultaneously used moulds,
for each mould used, a sprue stone is provided, which is arranged on a casting table and is provided for receiving the starter strands,
wherein the casting of the metal strands comprises a mould filling phase with the casting table fixed, in which a plurality of starter strands is cast into the associated sprue stones, and
the casting comprises a continuous casting phase in which the casting table is lowered and a plurality of metal strands is cast,

wherein the depth of the sprue stone for each mould is at least 50 mm, the mould filling phase is started simultaneously for all moulds with an identical filling speed, the casting process for the moulds that have reached the necessary metal level for starting the continuous casting phase is stopped and the continuous casting phase is started as soon as all moulds have reached the metal level necessary for the continuous casting phase.

2. The method according to claim 1 , wherein the depth of the sprue stone is 100 mm to 150 mm.

3. The method according to claim 1 , wherein the sprue stones of moulds with different mould formats have an identical depth.

4. The method according to claim 1 , wherein the mould filling phase has a duration of 90 s to 600 s.

5. The method according to claim 1 , wherein a plurality of moulds having a broad side length of 900 mm to 2200 mm is used simultaneously, whose narrow sides have a uniform length of 400 mm to 600 mm.

6. The method according to claim 1 , wherein during the mould filling phase, the metal level in the sprue stone is measured contactlessly, via a metal sensor, which is movable at least parallel to the broadside direction of the moulds, and the continuous casting phase is initiated depending on the metal level in the moulds.

7. The method according to claim 1 , wherein aluminium alloys of the type AA1xxx or AA8xxx, AA3xxx and AA6xxx are cast.

8. The method according to claim 1 , wherein the mould filling phase has a duration of 120 s to 480 s.

9. The method according to claim 6 , wherein the metal sensor measures the metal level in the sprue stone capacitively.

Assignees

• Droste Werner
• Hansmann Franz Guenter
• Hydro Aluminium Rolled Prod

Inventors

• Droste Werner
• Hansmann Franz Günter

Classifications

• B22D11/083

  Starter bar head; Means for connecting or detaching starter bars and ingots · CPC title

• B22D7/005

  from non-ferrous metals · CPC title

• B22D11/147

  Multi-strand plants · CPC title

• B22D11/081 Primary

  Starter bars · CPC title

• B22D11/003

  Aluminium alloys · CPC title