JPS60118355A - Casting method in twin roll type continuous casting machine - Google Patents

Abstract

PURPOSE:To operate efficiently a titled casting machine without stopping the machine in the stage of changing the width of side guides provided in the upper part of two juxtaposed cooling rolls so as to form the dam of a molten metal by performing a casting operation according to the schedule in the direction of increasing gradually said width. CONSTITUTION:The width of a strip is changedin the following way from the state in which side guides 3, 3 are set at a width W1 and the width of the cast strip 4 is made W' to meet the set width: The width of the guides 3, 3 is increased to W2 larger than W1 without stopping the supply of a molten metal. The width of the cast strip 4 is thereby increased from W1' to W2'. The width of the guides 3, 3 is similarly changed from W2 to W3 and the width of the strip 4 is increased from W2' to W3' in the case of changing the width. The width of the strip is changed according to the schedule for widening successively the side guides in the above-mentioned way and therefore the twin roll type continuous casting machine is efficiently used without stopping the machine in the stage of changing the width and the practicable use range of the casting machine is expanded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a casting method in a twin-roll continuous casting machine.

In recent years, a twin-roll continuous casting machine has been proposed in which molten metal is cast onto the top of two parallel cooling rolls and strips are continuously cast through a nozzle formed between the cooling rolls.

The present invention has been made in order to provide a completely new casting method using such a twin-roll continuous casting machine, and more specifically, a method for changing the width of a strip without stopping the casting line.

Hereinafter, the present invention will be described in detail with reference to the drawings.

The figure shows a twin-roll continuous casting machine used in the present invention.
．． Reference numeral 1 denotes cooling rolls arranged horizontally in parallel at predetermined intervals, and barrel guides 2, 2, which serve as dam plates in the longitudinal direction of the cooling roll 1.1, are attached on top of the cooling roll 1.1. , a side guide 3.3 for setting the width of the strip 4 to be cast is movably arranged between the barrel guides 2, 2 so as to be in sliding contact with the cooling rolls 1, 1 and the barrel guides 2, 2; By pouring the molten metal into the dam formed between the barrel guides 2, 2 and between the side guides 3.3 and rotating the cooling roll 1.1 in the direction of the arrow, the strip 4 can be continuously cast. It has become.

In the illustrated state, the side guides 3, 3 have a width (distance) W+
The width of the strip 4 to be cast is correspondingly W+'.

When changing the width of the strip 4 from this state, the width of the side guide 3.3 is increased to W2, which is larger than Wl, without stopping the supply of molten metal. As a result, the width of the cast strip 4 also changes from W+' to W2'. If you wish to change the width further, the width of the side guide 3.3 should be made W3 further than W2, and the width of the strip 4 should be made W2'.
from W3'.

As described above, in the present invention, when changing the width of the strip 4, a schedule is created in which the side guides 3.3 are sequentially widened in directions away from each other.

In the above, when the side guides 3.3 are moved in the direction of spreading, this can be easily done because the resistance of the molten metal does not act on the side guides 3,3. In this case, if the schedule is set in the opposite direction to narrow the side guides 3.3, the side guides 3.3 will be moved while destroying the mushy layer (semi-solidified layer) that has already formed on the surface of the cooling roll 1. Since the resistance has to be lowered, the side guide 3.
3, and causes a significant deterioration in the quality of jaw products.

It should be noted that the present invention is not limited only to the above-mentioned embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

As explained above, according to the present invention, the width of the strip is changed according to the schedule of sequentially lowering the side guides, so that the casting machine can be used efficiently without stopping when changing the width, and the casting machine can be put to practical use. This has the excellent effect of expanding the time range.

[Brief explanation of the drawing]

The figure is an explanatory diagram of a twin-roll continuous casting machine for carrying out the casting method of the present invention. 1 is a cooling roll, 2 is a barrel guide, 3 is a side guide, and 4 is a strip.

Claims (1)

[Claims] 1) In a twin-roll continuous casting machine equipped with side guides to form a dam of molten metal above two parallel cooling rolls, casting work is performed on a schedule in which the width of the side guides is gradually increased. A casting method in a twin-roll continuous casting machine, which is characterized by: