JPS583465B2 - Roll Norei Yakusouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for producing amorphous metal by rapidly cooling molten metal in the form of a tape, for example, by jetting molten metal between two closely rotating high-speed rolls and bringing it into contact with the rolls. The present invention relates to a roll cooling device that uses a heat pipe as a means for cooling the roll in a method of manufacturing the metal foil by rapidly cooling the roll.

In the method of manufacturing metal foil by rapidly cooling molten metal using the roll cooling method as described above, conventionally the roll is made of a metal with good thermal conductivity such as steel or copper, and the molten metal is cooled using this metal with good thermal conductivity. Rapid cooling was achieved by bringing it into contact with the roll.

However, when this device jets a large amount of molten metal between rolls to make a long metal tape, the temperature of the rolls rises, and the cooling rate at the beginning and end of the tape is different. For example, there are disadvantages in that a metal tape with uniform performance cannot be obtained, such as the mechanical properties being worse at the end of the tape.

The present invention has been made to eliminate these drawbacks, and achieves the desired results by forcibly cooling the roll using a heat pipe as a cooling means for the roll.

That is, in the apparatus of the present invention, a metal foil is manufactured by jetting molten metal between two closely rotating rolls that rotate at high speed, bringing it into contact with the rolls, and rapidly cooling the metal foil, in which the rolls are forcibly cooled using a heat pipe. This eliminates the difference in the cooling rate between the beginning and end of the tape, even when processing a large amount of molten metal to make a long metal tape, resulting in a long metal tape that has uniform mechanical performance over its entire length. This made manufacturing possible.

Moreover, in the present invention, a heat pipe is used as a means of cooling the roll, but since the heat pipe uses the evaporation and condensation effects of the coolant, its cooling capacity is much greater than that of ordinary water cooling. Also, since the heat pipe itself forms a closed system, it can be incorporated into the roll itself for a compact design, and it also has various excellent advantages such as being easy to maintain and manage. have.

Therefore, in implementing the present invention, from the standpoint of cooling efficiency, it is preferable to construct the roll itself as a heat pipe, but sufficient cooling performance can also be obtained by attaching a heat pipe to the roll.

In the latter case, it is more advantageous in terms of cooling performance to arrange a plurality of heat pipes close to the roll surface at equal intervals in the circumferential direction.

In this case, in order to maintain the balance of the roll, it is preferable to arrange two or more heat pipes point-symmetrically with respect to the roll axis.

In all of the above cases, one end of the heat pipe is inserted into the roll to form a coolant evaporation part, and the other end of the heat pipe protrudes outside the roll to form a coolant condensation part. It is advantageous to attach a regular fin to the outer surface of the other end of the heat pipe constituting the condensing part, since this can improve the cooling efficiency in that part and, by extension, the ability to cool the roll by the heat pipe.

The other end of the heat pipe protrudes outside the roll and rotates at high speed with the roll, so it is sufficiently cooled by air cooling, but if further cooling is required, it may be water cooled. When installing the heat pipe, the heat pipe is placed in close contact with the inner surface of the outer periphery of the roll or the inside of a perforation drilled parallel to the roll axis near the circumferential surface of the roll to ensure good thermal conductivity. Alternatively, the perforated inner surface itself may be formed on the coolant evaporation surface of the heat pipe.

As described above, the roll cooling device of the present invention can efficiently cool the roll at a constant cooling rate over a long period of time, so it is possible to continuously manufacture long metal foils that require rapid cooling. It is particularly suitable for use in the desired industrial manufacturing method of amorphous metal foil, and the smaller the roll diameter, the greater the cooling effect, which is advantageous.

Next, the present invention will be specifically explained with reference to embodiments shown in the drawings.

Example 1 In Figure 1 A and B, 1 and 1 are two adjacent rolls made of metal with good thermal conductivity, rotating at high speed in the direction of the arrow, and molten metal is jetted into the gap between these rolls 1 and 1. By doing so, a metal tape is to be obtained continuously, and a heat pipe 2 is tightly inserted into this roll 1.

In this case, the center portion of the heat pipe 2 is inside the roll and constitutes a coolant evaporation section, and both ends come out of the roll and constitute a coolant condensation section.

Further, four heat pipes 2 are each attached close to the surface of the roll 1 symmetrically with respect to the rotational axis of the roll to improve the balance of the roll and the cooling ability of the roll.

Also, a fin 3 is attached to the protruding part of the heat pipe 2 from the roll.
is installed to help cool the condensing section.

Therefore, when the roll 1 rotates at high speed and comes into contact with the molten metal to be rolled and is heated, the heat is transferred to the evaporation part of the heat pipe 2, and the heat medium trapped in the heat pipe 2 evaporates. The evaporative heat transfer medium condenses and radiates heat in the condensing section, repeating the cycle.

At this time, the condensing part of the heat pipe 2 is effectively forcedly air cooled because its fins 3 move in the air at high speed, but water cooling may be used in combination as the case requires.

Example 2 As shown in FIGS. 2 and 3, the roll 1 is hollow and the stiff body constitutes the coolant evaporation part of the heat pipe 2, so the cooling ability of the roll is improved compared to Example 1. do.

As shown in FIG. 2, the coolant condensing portion of the heat pipe 2 may be provided with a plurality of fins 3 protruding from the side surface of the roll symmetrically with respect to the roll rotation axis, and a third fin 3 may be provided at the protruding end.
As shown in the figure, the rotating shaft 4 of the roll may also be used as the coolant condensing part of the heat pipe, and fins 3 may be provided at the end thereof.

Heat pipe 4 with 8mmφ on the roll with outer diameter 80mmφ
A book was inserted and brought into close contact with the roll at a distance of 27 mm from the center of the roll and 5 mm from the roll surface in a direction parallel to the roll rotation axis.

Also, both ends of each heat pipe are 20m from both sides of the roll.
18 mm in diameter was attached to each of the protruding ends.

The heat pipe used was a copper pipe made of phosphor blue, and water was used as the coolant.

The above two rolls are brought close to each other with an interval of 0.02 mm, and 50 Fe-30Ni -1 is placed in the gap between the rolls.
500 gr of an alloy of 0P-5B-58 i (atomic %) was jetted at a molten metal mixture of 1100°C.

In this way, 350 m of amorphous alloy tape with a thickness of 0.05 mm and a width of 4 mm was obtained.

There was almost no difference in mechanical properties between the beginning and end of the tape obtained.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1A and 1B are a front view and a side view of a roll cooling device showing Embodiment 1 of the present invention, and FIGS. 2 and 3 are illustrating Embodiment 2 of the present invention. FIG. 3 is a longitudinal sectional front view of the illustrated roll cooling device. 1...Roll, 2...Heat pipe, 3...Fin.

Claims (1)

[Claims] 1. In an apparatus for manufacturing foil of a metal by jetting molten metal between two closely rotating high-speed rolls and bringing it into contact with the rolls to rapidly cool the metal, one or both of the two closely rotating rolls are connected to a heat pipe. 1. A roll cooling device characterized in that a heat pipe is attached to one or both of two adjacent rolls.