JPH0148328B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing amorphous metal granules that is configured to perform granulation very efficiently.

Amorphous metals are metals that do not have a regular lattice crystal structure, such as Fe-Ni-P-B alloys, and can be obtained by rapidly cooling them in a molten state in an extremely short period of time. It will be done.

The amorphous metal thus obtained has excellent mechanical strength and corrosion resistance, and is expected to be used in a wide range of applications.

Since this amorphous metal is obtained by rapid cooling as described above, it must be instantaneously cooled from a molten state, and care must be taken to prevent oxidation.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide an apparatus for producing amorphous metal powder that can be granulated extremely efficiently.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

The figures illustrate one embodiment of the invention.
In this figure, what is indicated by the reference numeral 1 is a cylindrical shaft. The cylindrical shaft 1 is disposed vertically and rotatably supported by a base frame 3 fixed on a base 2 by a thrust bearing 4.

The lower end of the cylindrical shaft 1 is connected via a rotary joint 10 to a piping 11 to a supply source of inert gas such as nitrogen gas.
connected by. A pressure gauge 12 is interposed in the middle of the pipe 11.

Further, a pulley 5 is fixed near the lower end of this cylindrical shaft 1.

A motor 7 is attached to a support frame 6 provided on the side of the base frame 3.
is fixed. A belt 9 is endlessly installed between a pulley 8 fixed to the output shaft of the motor 7 and the pulley 5, and rotational force is transmitted to the cylindrical shaft 1 when the motor 7 is started. .

On the other hand, on the outside of the cylindrical shaft 1, a rotating cylinder 26 is arranged concentrically therewith. The lower end of this rotary cylinder 26 is supported by the base frame 3 via a thrust bearing 32.

A bearing 2 is provided between the rotating cylinder 26 and the cylindrical shaft 1.
8 are arranged, and both are in a state where they can rotate freely relative to each other.

Further, a pulley 36 is fixed in the middle of the rotating cylinder 26, and a motor 38 is attached to this pulley 36 and a support frame 37 fixed on the base 2.
A belt 40 is stretched endlessly between the pulley 39 and a pulley 39 fixed to the output shaft.

Furthermore, the rotating cylinder 26 is supported via a bearing 27 by a bearing portion 24a installed on a support plate 24 attached via a support shaft 25 protruding from the base 2.

A box-shaped frame 33 is fixed to the upper end of the rotary cylinder 26.

The frame body 33 has a double wall with concentric side walls. The space between this double wall is
It communicates with the inside of the rotary cylinder 26 through an opening 26b formed in the rotary cylinder 26. A discharge port 33b is provided at the lower end of the crown part 33a formed at the upper part of this double wall.

This outlet 33b is inserted into a fixed cylindrical water container 34. One end of the water receiving container 34 is a discharge pipe 34a;
The water container 34 communicates with a water tank 35 through 4a.

A cylindrical cooling water supply device 29 is arranged at the base of the rotating cylinder 26 and fixed to the base frame 3.

The cooling water supply device 29 forms an annular flow path 31 on its inner peripheral surface. This flow path 31 is connected to the rotary cylinder 26
It communicates with the inside of the rotary cylinder 26 through an opening 26a formed in the rotary cylinder 26.

A plurality of openings 26a are provided, and the cooling water supplied from the cooling water supply port 31a opened in the flow path 31 passes through these openings 26a to the rotary tube 26.
supplied within.

An airtight state is maintained between the cooling water supply device 29 and the rotary cylinder 26 using a bearing 30 and an O-ring 29a as sealing materials.

On the other hand, a rotary cup 14 is fixed to the upper end of the cylindrical shaft 1 via a support member 13.

The support member 13 and the rotary cup 14 are housed inside the frame 33 described above.

A heat-resistant material 14a is provided on the inner peripheral surface of this rotary cup 14.
is lined.

A plurality of nozzles 16 are protruded from the rotary cup and extend radially toward the inner wall of the frame body 33.

Further, an inert gas injection nozzle 15 is provided in the support member 13 in a state communicating with the passage 13a.

The front part of the injection nozzle 15 is bent, and its tip reaches near the tip of the nozzle 16 of the rotary cup 14.

Further, a cylindrical frame 19 for supplying inert gas is arranged surrounding the rotary cup 14.

The cylinder frame 19 is formed hollow, and an inert gas supply port 19a is provided at its upper end. A rotary cup 1 is attached to the lower end of the cylinder frame 19.
An open jet port 19b is provided near the nozzle 16 of No. 4.

Further, a casing 20 is installed surrounding the frame body 33 and the cylinder frame 19.

This casing 20 receives amorphous metal particles obtained as described below, and is provided with a discharge pipe 20a at one end thereof.
A discharge port 20b is opened at the tip.

A hopper 21 is disposed in connection with the discharge port 20b, and the product (amorphous metal granules) stored in the hopper 21 is fed in quantitative quantities by a rotary feeder 21a provided at the lower end of the hopper 21. It is ejected outside the aircraft.

Furthermore, the casing 20 is integrated with a cylindrical body 22 provided surrounding a frame 33, and the lower end of the cylindrical body 22 is fixed to the above-mentioned support plate 24 via a plurality of pillars 23.

A crucible 17 is provided inside the cylinder 22, and a highly active molten metal 18 is supplied into the crucible 17. The lower end of the crucible 17 is inserted into the rotary cup 14.

Next, the operation of this embodiment configured as above will be explained.

First, the motors 7 and 38 are started, and the cylindrical shaft 1 and the rotating cylinder 26 are connected via the belts 9 and 40.
Rotate.

At the same time, inert gas is supplied through the piping 11 into the cylindrical shaft 1 through the rotary joint 10 and into the cylinder frame 19 from the supply port 19a, and rotates from the injection nozzle 15 and the injection port 19b of the cylinder frame 19. The gas is ejected toward the spout of the nozzle 16 of the cup 14 to form an inert gas atmosphere around the rotating cup 14.

Further, cooling water is supplied into the cooling water supply device 29 from the cooling water supply port 31a. This cooling water
6a into the rotating cylinder 26, and further into the opening 26b.
It is supplied to the space between the double walls of the frame 33 through the.

In this state, the molten metal 18 is supplied to the crucible 17 as shown by the arrow, and the molten metal is supplied into the rotary cup 14 from its lower end.

Then, since the rotary cup 14 is rotating at a predetermined speed, the molten metal 18 supplied into the rotary cup 14 is pressed against the inner peripheral surface of the heat-resistant material 14a located inside the rotary cup 14, and It is ejected from the tip of the nozzle 16 by force.

At this time, the inert gas supplied from the injection nozzle 15 and the lower end of the cylinder frame 19
There is an inert gas atmosphere in the vicinity of the ejection port 6, which prevents contact between the molten metal and oxygen in the atmosphere.

By the way, the molten metal discharged from the nozzle 16 is cooled in the double-walled frame 33.
It collides with the wall facing the nozzle 16, is rapidly cooled and dispersed, and scatters into the casing 20.

The metal particles scattered in the casing 20 move along the discharge pipe 20a, are discharged from the discharge port 20b into the hopper 21, and are transferred to the rotary feeder 21a.
A fixed amount is taken out of the machine and used as a product.

On the other hand, the cooling water between the double walls of the frame 33 enters the crown part 33a from the upper end of the double wall, and further flows through the discharge port 3.
The water enters the water container 34 through the water container 3b and is discharged into the water tank 35 through the discharge pipe 34a.

As is clear from the above description, according to the present invention, molten metal is ejected by centrifugal force from the nozzle of a rotating cup rotating at a predetermined speed, and simultaneously collides with the wall surface of the double wall of the rotating frame. The amorphous metal can be granulated for dispersion and rapid cooling.

In addition, molten metal or granular metal at high temperatures is in an inert gas atmosphere, so
Amorphous metal particles can be obtained extremely efficiently without oxidation.

[Brief explanation of drawings]

The figure is a longitudinal side view illustrating an embodiment of the present invention. 1 is the cylindrical shaft, 2 is the base, 5, 8, 36, 39
is a pulley, 7, 38 is a motor, 9, 40 is a belt, 10 is a rotary joint, 11 is a pipe, 1
3 is a support member, 14 is a rotating cup, 14a is a heat-resistant material for the rotating cup, 15 is an injection nozzle, 16 is a nozzle, 17 is a crucible, 18 is a molten metal, 19 is a cylinder frame, 19a is an inert gas supply port, 19b is an inert gas outlet, 20 is a casing, 20b is an exhaust port, 21 is a hopper, 21a is a rotary feeder, 24 is a support plate, 26 is a rotating cylinder, 26a, 26
b is an opening, 29 is a cooling water supply device, 31a is a cooling water supply port, 33 is a frame, 33a is a crown of the frame, 3
3b is a discharge port of the frame, 34 is a water container, 34a
is a discharge pipe of the water container, and 35 is a water tank.

Claims (1)

[Claims] 1. In an apparatus for producing amorphous metal granules, the rotating cup is equipped with a cylindrical shaft and a rotating cylinder arranged concentrically and rotated independently, and a rotating cup having a nozzle fixed to the upper end of the cylindrical shaft. is housed, the side wall is formed into a concentric double wall, the lower end of which is connected to the rotating cylinder, the frame body is fixed to the rotating cylinder, and the nozzle of the rotating cup is made to protrude toward the inner wall of the frame body. Further, the structure is characterized in that a cooling water supply device communicating with the inside of the rotating cylinder is disposed at the lower part of the rotating cylinder.