JPH0434997Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement of a single-roll or double-roll device for directly producing a ribbon (tape) from molten metal.
This is particularly aimed at improving the quality of the ribbon surface.

[Conventional technology]

Generally, single-roll devices and double-roll devices are known as devices for directly producing ribbons from molten metal. As shown in Fig. 3, the single roll device has a cooling roll 1 rotating in the direction of the arrow, a heating device 2 such as a high-frequency coil surrounding it, and a nozzle 4 at the bottom end.
A crucible 3 is disposed, and the molten metal 5 held in the crucible 3 is jetted from a nozzle 4 onto a rotating cooling roll 1, and the molten metal 5 is directly solidified into a ribbon 6. Further, as shown in FIG. 4, the twin roll device is a crucible in which a heating device 2 is provided around the opposing portions of a pair of left and right cooling rolls 1a, 1b and a nozzle 4 is provided at the bottom end of the cooling rolls 1a and 1b, which rotate in the direction of the arrow. Place 3,
The molten metal 5 held in the crucible 3 is jetted from the nozzle 4 between the opposing parts of the cooling rolls 1a and 1b, and the molten metal 5 is
is directly solidified into a thin ribbon.

Such single-roll and double-roll machines are used to manufacture thin strips of amorphous alloy tapes, Al alloys, Cu alloys, solder, etc. Although not shown in the figure, they are also equipped with roll cooling equipment, peeling nozzles, winding equipment, etc. It has the following facilities. The surface quality of the ribbon obtained with such equipment is closely related to the surface quality of the cooling roll, and in particular, if foreign matter adheres to the roll surface, holes or large dents may occur in the ribbon in that area. Are known,. Therefore, conventionally, in order to finish the roll surface as smooth as possible and remove the deposits on the roll surface, as shown in FIG. The brush 7 is directly moved. The brush material used is one that does not damage the roll surface, such as plastic or a material containing an abrasive.

[Problems to be solved by the invention] As shown in FIG. 5, when thin strips are continuously produced by bringing the rotating brush 7 into contact with the cooling roll 1, foreign matter accumulates on the brush 7, and the foreign matter removal ability gradually decreases. There was a drawback that the surface quality of the obtained ribbon was impaired.

[Means for solving problems]

With this in mind, as a result of various studies, we have developed a metal ribbon manufacturing device that can continuously clean the cooling roll surface without leaving any deposits on it. This single-roll or double-roll device is characterized in that a cleaning belt is brought into contact with a part of the surface of a rotating cooling roll in a direction opposite to the rotational direction of the roll.

This will be explained in detail regarding a single roll device.
That is, as shown in FIG. 1, the device of the present invention allows a reel-to-reel type belt 8a to be unwound from a reel attached to a powder brake shaft 9 to any position on the surface of a cooling roll 1, and then to pressurize rolls 10a, 10b.
By passing the belt 8a between the cooling roll 1 and winding it onto a take-up roll attached to the motor drive shaft 11, the belt 8a is moved in a direction opposite to the rotating direction of the roll 1 while being pressed against the cooling roll 1 surface. Alternatively, as shown in FIG. 2, the endless belt 8a is pressed to any position on the surface of the cooling roll 1 by the pressure rolls 10a, 10b, the tension roll 12, and the motor drive shaft 11, and the rotating direction of the roll 11 is adjusted. Move in the opposite direction. In the figure, 2 is a heating device, 3 is a crucible, 4 is a nozzle, 5 is a molten metal,
6 indicates a thin strip.

Paper, cloth, or the like is used as the open-reel belt or the endless belt, and the transfer speed is determined by taking into account the circumferential speed of the cooling roll, the length of the belt, the amount of molten metal (manufacturing time), etc. In the case of an endless belt, it is desirable to prevent the portion that has passed once from coming into contact with the roll surface again.

[Effect]

As described above, according to the present invention, since a new cleaning belt is always brought into contact with the roll surface, foreign matter adhering to the roll surface is reliably removed, making it possible to obtain a long ribbon with excellent surface properties. Can be done.

〔Example〕

Using the device of the present invention shown in Figure 1, Pb-15wt%
3kg of Sn solder tape (width 40mm, thickness 25μ) was manufactured. An iron roll with a diameter of 350 mm was used as the cooling roll and was water-cooled. Also, the belt has a width of 50mm and a thickness of 2mm.
A buffing cloth was used, and the transfer speed was 20 mm/sec.

As a result, a solder tape with excellent surface properties was obtained, except for a very small initial part. When the buffing cloth was observed after the tape was manufactured, it was found that the surface had turned black and many fine flakes of solder had adhered to it, indicating that the roll surface had been cleaned. The contact length between the roll and the buffing cloth should be approximately
It was set at 100 mm, but it was found that the effect remained the same even if it was shortened to about 20 mm or increased to 100 mm or more.

An experiment was also conducted under the same conditions using kraft paper with a thickness of 0.2 mm, and the results were similar to those obtained when a buffing cloth was used.

For comparison, when I removed the belt, a hole appeared in the solder tape at the same time. In addition, as shown in Figure 5, a polyethylene brush (outer diameter 50 mm) was placed.
It was rotated at a speed of 200 rpm in the opposite direction to the rotation direction of the cooling roll. As a result, a solder tape with excellent surface properties was obtained, but the surface properties of the tape (on the roll side) gradually deteriorated from the middle, and holes were observed in some parts.

Although the manufacturing of solder ribbons has been described, the present invention is also effective in manufacturing ribbons of Al alloys, Cu alloys, Mg alloys, etc. Furthermore, although a single roll device has been described, the invention is not limited to this, and similar effects can be obtained with a double roll device.

[Effect of idea]

According to the present invention, since it is possible to continuously clean the roll surface without any foreign matter remaining on the roll surface, it is possible to produce long ribbons (tape) with excellent surface properties, resulting in remarkable industrial effects. It is something.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of the device of the present invention;
The figure is an explanatory diagram showing another example of the device of the present invention, FIG. 3 is an explanatory diagram showing an example of a conventional single roll device, and FIG.
The figure is an explanatory diagram showing an example of a conventional double roll device, and FIG. 5 is an explanatory diagram showing another example of a conventional single roll device. 1... Cooling roll, 2... Heating device, 3... Crucible, 4... Nozzle, 5... Molten metal, 6... Tape, 7... Brush, 8a, 8b... Belt, 9...
...Powder brake shaft, 10a, 10b...Pressure roll, 11...Motor drive shaft, 12...
...Tension roll.

Claims (1)

[Scope of utility model registration request] In a single-roll or double-roll device that jets molten metal onto a rotating cooling roll and directly solidifies it into a thin strip, a cleaning belt is brought into contact with a part of the surface of the rotating cooling roll in a direction opposite to the rotational direction of the roll. A metal ribbon manufacturing device characterized by the following.