KR880002055Y1 - Apparatus for product strip with rotary casting tables - Google Patents

Abstract

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Description

Thin ribbon manufacturing device using high speed rotating drum

1 is a perspective view of main parts of the present invention.

Figure 2 is a side view of a partial incision showing the main part of the present invention.

3 is a cross-sectional view of FIG. 2.

Figure 4 is a schematic diagram of a device for manufacturing a thin ribbon using a conventional high-speed rotating drum.

5 is a helical cross-sectional view of FIG.

* Explanation of symbols for main parts of the drawings

1: elastic plate 2: elastic member

3: contact member 4: smoothing ball

4a: air barrier plate 4b: lower plate

4c: mounting plate 5: drum

6: nozzle 7: seating groove

8: vertical moving plate

The present invention relates to an apparatus for producing an amorphous alloy ribbon by quenching the molten liquid metal sprayed on the outer peripheral surface of the drum rotating at high speed.

In general, the amorphous alloy ribbon is manufactured using a ribbon production apparatus using a single drum as shown in FIG. 4, which is a peripheral surface of the drum L on which the molten liquid metal is rotated at high speed through the injection nozzle N. LS) by spraying on the rapid cooling to produce an amorphous alloy ribbon (B).

However, the apparatus for manufacturing thin ribbon B using such a single drum L has a thin air boundary layer due to the frictional force between the drum L outer surface LS and the air because the drum L rotates at high speed in the atmosphere during manufacture. The air in the thin air boundary layer is formed between the molten liquid metal formed on the drum L outer circumferential surface LS and subsequently ejected through the nozzle N and the drum L outer circumferential surface LS, and the cooling device The thin ribbon B produced by cooling in the air by air has a drawback in that bubbles G are generated as shown in FIG.

The surface roughness of both surfaces of the thin ribbons B after the injected molten liquid metal is cooled and solidified is compared with the surface roughness (2-5 μm) of the surface Bs exposed to the atmosphere during solidification. It can be seen that the surface roughness (5-10 μm) of the contact surface Bc in contact with the outer circumferential surface LS is more rough.

More specifically, the lower surface roughness of the roller (L) contact surface (Bs) than the surface roughness of the thin surface (B) surface (Bs) is caused by foreign matter such as fine dust on the outer surface (Ls) of the drum (L) exposed in the air. This is because there is a closed end where the molten liquid metal injected by the solidified solid state is incompletely adhered to the drum L outer circumferential surface LS.

In addition, the air vortex generated by the high-speed rotation of the drum (L) is delivered to the injection nozzle (N) to force the air to cool the molten liquid metal, resulting in a decrease in the flow of the molten liquid metal, so that the thin ribbon (B) ), The surface roughness was rough.

Therefore, the present invention is intended to provide a high quality amorphous alloy ribbon having a uniform surface roughness by solving the above-mentioned conventional drawbacks and problems.

That is, as shown, an elastic plate (1) such as phosphor bronze, nickel bronze, zirconium copper, berylnium copper, an elastic member (2) made of rubber or polymer system, and a contact member (3) having low frictional heat and low coefficient of friction (3). ) With glue The shape smoothing hole 4 is bent, and the lower plate 4b connected to the air diaphragm 4a is formed into the same curved surface as the outer surface of the drum 5 outer circumference, and the seating groove 7 of the nozzle 6 is placed at the center thereof. It is installed in the upper part of the drum (5) of the known thin ribbon manufacturing apparatus by attaching the vertical moving plate (8) to the horizontally installed, attached plate (4c) bent and pushed on the upper side.

Here, the vertical moving plate 8 is connected to the vertical moving device (not shown) to be able to move up and down.

In the figure, reference numeral 9 denotes a thin ribbon, 9 'is a contact surface adhered to the outer peripheral surface 5' of the drum 5, and 9 'is an exposed surface.

The effect will be described below. First, the vertically moving device is operated so that the smooth port 4 mounted on the vertically movable plate 8 is directly lowered so that the lower plate 4b abuts on the outer surface 5 'of the drum 5. Make sure it's seated.

The nozzle 6 is then lowered so that the tip of the nozzle 6 is inserted into the seating groove 7 in the center of the smooth hole 4 lower plate 4b, but is not in contact with the outer surface 5 'of the drum 5. Make sure to stop a little distance (less than 2mm).

When the drum 5 is rotated at a high speed in this state, when the molten liquid rapid velocity is injected through the injection nozzle 6, the molten liquid metal is deposited on the outer peripheral surface 5 'of the drum 5 and quenched so that the thin ribbon 9 is To be manufactured.

Therefore, as described above, the outer surface 5 'of the drum 5 and the lower plate 4b of the smooth hole 4 are abutted in the process of manufacturing the thin ribbon 9, so that the drum 5 rotates so that the molten liquid metal may be deposited. The molten liquid metal is formed by removing foreign matters stuck to the outer peripheral surface 5 'of the drum 5 and preventing the formation of an air boundary layer caused by the frictional force between the outer peripheral surface 5' of the drum 5 rotating at high speed and air. Bubbles can be prevented from forming after solidification.

In addition, since the smoothing opening 4 of the air diaphragm 4 'is located in front of the nozzle 6, it is possible to reduce the delivery of air vortices to the nozzle 6, thereby preventing the molten liquid metal from being forced air-cooled and melting. The fall of the fluidity | liquidity of a liquid metal can be prevented.

Therefore, according to the present invention, the surface roughness of the cooled and solidified thin ribbon 9 and the contact surface 9 'can be increased while cleaning the outer peripheral surface 5' of the drum 5, and the cooling rate can be increased. To prevent bubbles from being generated and to prevent forced air cooling and reduced fluidity of the molten liquid metal, thereby obtaining a uniform and good surface roughness of both surfaces (9 ', 9' ') of the amorphous alloy thin ribbons (9). It is.

Claims (1)

An elastic plate (1) such as phosphor bronze, nickel bronze, zirconium copper, and berylnium copper, an elastic member (2) made of rubber or a polymer system, and a contact member (3) having low frictional heat and low coefficient of friction are adhered with an adhesive. The shape smoothing hole 4 is bent, and the lower plate 4b connected to the air diaphragm 4a is formed into the same surface as the curved surface of the outer peripheral surface 5 'of the drum 5, and the seating groove of the nozzle 6 at the center thereof. (7) is laid horizontally, and attached to the vertical transfer plate (8) to the mounting plate (4c) bent in the upper and installed on the drum (5) of the known thin ribbon manufacturing apparatus to the vertical transfer plate (8) Apparatus for producing a ribbon using a high-speed rotating drum, characterized in that the lifting and lowering.