JPS5937706B2 - Nozzle for amorphous metal production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle for use in the production of amorphous metal strip.

In recent years, research into amorphous metals obtained by rapid solidification of molten metals has become active, and certain alloys in particular have attracted attention for their properties, such as their excellent magnetic materials with high magnetic permeability and good magnetic properties. Research and development is becoming more active.

One method for manufacturing such amorphous metal is to jet molten metal from a nozzle onto the surface of a rapidly rotating quench roll and rapidly solidify it to obtain an ultra-thin foil-like thin metal strip. Are known.

By the way, a nozzle with a slit for supplying molten metal to the surface of a cooling roll is usually made by drilling a slit opening into an integral material such as ceramics, but in this case, wear resistance is In addition to the problem that it is difficult to select a good material because it has relatively poor workability, there is also the problem of filling a filling container such as a tundish, which supplies molten metal to a nozzle, with molten metal at predetermined intervals. In this case, it is necessary to devise a separate mechanism to temporarily interrupt the jetting, and furthermore, it is impossible to adjust and control the jetting flow by changing the slit opening degree during the continuous production of amorphous metal thin sheets. There was a problem.

These points are disadvantageous when manufacturing strips of amorphous metal sheets in large quantities on an industrial scale.

The present invention has been made in view of these various points, and for the purpose of high-precision processing, such as mirror polishing of the side wall surface surrounding the slit opening for spouting molten metal, the slit opening is The nozzle is composed of a combination of divided bodies such that each side wall surface surrounding the divided body forms an open outer surface of the divided body, and furthermore, by moving these two divided bodies in the direction of the slit opening gap width, the slit opening can be opened and closed, and the slit opening can be opened and closed. This makes it possible to adjust the amount of opening gap.

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes one fixed divided body of a nozzle tip having a concave planar shape, and the other side is closely joined to the side surface of the concave portion of the divided body 1 so that the gap width of the slit opening 3 can be varied. A shape dividing body 2 is provided movably.

According to such a configuration, the four side wall planes surrounding the slit opening 3 have no restrictions on the operation of the processing tool outside of each plane, and since these are open planes, the altitude is low. It is possible to obtain high processing accuracy and dimensional accuracy.

According to a nozzle made of such a combination of divided bodies, the jet flow of molten metal becomes unstable depending on the processing condition of the slit portion 3, which may lead to variations in the thickness of the thin metal plate to be manufactured, and eventually variations in the cooling rate. has been significantly reduced, and it has become possible to use materials with excellent wear resistance, such as high-purity alumina and silicon nitride, which have poor workability, in addition to ordinary ceramics.

In addition, a slit opening 3 formed by the divided bodies 1 and 2
The medium length l of the slit gap can be adjusted by moving the fitting parts of the divided bodies 1 and 2 in and out, and it is easy to adjust and set the medium length l of the slit gap prior to manufacturing. Even during the production of quality metal, it is possible to close the slit opening or finely adjust the gap l.

FIG. 2 shows an embodiment in which a split nozzle is attached to the sump tank 8.

The fixed divided body 5 is fixed to a metal frame 9 at the bottom of the water tank using a nozzle-integrated metal frame 4.

The sliding divided body 7 is connected to a hydraulic cylinder (or electric cylinder) via a drive fitting (not shown), and a slit opening 6 is formed as necessary.

The divided body is provided with a sliding divided body 7 to facilitate sliding.
In order to prevent the split body from falling off, a guide rail with unevenness may be provided on the sliding surface of the divided body.

As described above, the nozzle used for manufacturing the amorphous metal thin plate according to the present invention has a relatively simple configuration and can obtain high processing accuracy of the slit opening, as well as adjust the medium length of the gap and open/close the slit opening. The practical benefits, such as being able to do so, are extremely significant.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a nozzle showing one embodiment of the present invention;
Figure A shows an embodiment in which a split nozzle is attached to a water tank, with Figure A showing a side view and Figure A showing a bottom view. 1...Divided body, 2...Divided body, 3...
...Slit opening, 4...Nozzle assembly fitting, 5...Divided body, 6...Slit opening, 7...Divided body, 8・・・・・・Hot water tank, 9・
...The metal frame at the bottom of the hot water tank.

Claims (1)

[Claims] 1. In a nozzle having a slit opening with a small gap width for spouting molten metal for manufacturing an amorphous metal thin plate,
A gap width is obtained by combining a first divided body having a concave portion with three of the 4,000 sides of the side wall surrounding the slit opening and a second divided body having one side and slidably fitting into the concave portion. A nozzle for manufacturing amorphous metal, characterized by forming a slit opening that can be variably adjusted.