JPH0220183Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a molten metal supply device for a rotary powder material manufacturing device, and in particular to a rotating device capable of uniformly and quantitatively flowing molten metal onto the surface of a turntable. The present invention relates to a molten metal supply device for a type powder material manufacturing device.

[Conventional technology]

As an example of an apparatus for manufacturing powdered metal materials used in powder metallurgy, the apparatus shown in FIG. 5 is known. This is based on the atomization method,
In the furnace 1, the molten metal flowing down from the melting device 2 is received on the surface of a turntable 3 that rotates at high speed, and the received molten metal is scattered outward from the surface of the disk by the centrifugal force of the turntable 3 to form a powder. It is designed to obtain metal materials.

[Problem that the invention attempts to solve]

By the way, when the molten metal is made to flow down the turntable 3, if the amount of the molten metal flowing down changes sequentially and the distribution of the molten metal on the board surface becomes uneven, this will result in an unbalanced moment about the axis of the turntable 3, causing vibration. It causes. This also occurs when the position of the molten metal flowing down to the turntable is offset with respect to the axis of the turntable. In addition, changing the amount of molten metal on the turntable 3 changes the rotational speed of the turntable 3, and therefore the degree of scattering due to centrifugal force becomes uneven, resulting in a change in the particle size of the powdered metal material produced. This can also lead to variations in the results.

[Purpose of invention]

This invention was devised in view of the above-mentioned problems, and its purpose is to quantify the amount of molten metal flowing down to the turntable, and to even out the distribution of molten metal on the turntable. The present invention provides a molten metal supply device for a rotary powder material manufacturing device.

[Summary of the idea]

The present invention has a container for containing molten metal,
In a molten metal supply device of a rotary powder material manufacturing apparatus that manufactures powdered metal material by scattering molten metal that has flowed down onto a rotating turntable using centrifugal force, the bottom of the container is placed on the turntable. A nozzle hole is formed to discharge the molten metal symmetrically with respect to the axis of the turntable and inclined along the rotational direction of the turntable, and the molten metal is pressurized and discharged in a fixed amount into the container. By providing a pressurizing means to cause the molten metal to flow down the turntable, the molten metal is distributed in a fixed amount and uniformly, and the molten metal is prevented from splashing when flowing down.

〔Example〕

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a cylindrical container 4 for accommodating molten metal M is provided directly above the turntable 3. A separately melted molten metal M may be poured into this container 4, or
Alternatively, a high-frequency heating device or the like may be installed around the container 4 to directly melt the raw material within the container 4. A discharge port 5 is formed in the turntable side portion of the container 4, and a nozzle plate 7 is detachably provided in a stepped portion 6 formed in the discharge port 5. In this nozzle plate 7, as shown in FIG. 2, a plurality of nozzle holes 8 are arranged radially, facing the turntable 3, and symmetrical about an axis C, which is the center of rotation of the turntable 3. In this embodiment, as shown in FIGS. 3 and 4, the nozzle holes 8 are formed obliquely and sequentially along the rotational direction of the turntable 3.
The molten metal M in the container 4 is made to flow down along the rotational direction of the turntable 3.

On the other hand, an open end 9 formed on the side facing the discharge port 5 of the container 4 is provided with an extrusion piston or the like to advance into the container 4 and process the molten metal M stored in the container 4. A ram 10 serving as a pressurizing means for pressurizing and discharging a fixed amount from the nozzle hole 8 is slidably provided.

Next, we will discuss the effect.

The molten metal M is stored in the container 4, and the ram 1 is sequentially
0, the molten metal M pressurized by the ram 10 is discharged from the nozzle hole 8 onto the turntable 3 symmetrically with respect to its axis and along the rotation direction of the turntable 3. flowed down.

By the way, in the present invention, since the molten metal M is discharged while being pressurized by the ram 10, the amount of the molten metal M flowing down onto the turntable 3 can be controlled and quantified. Therefore, it is possible to keep the amount of molten metal on the turntable 3 constant and suppress fluctuations in the rotational speed, and it is possible to manufacture powdered metal material with uniform particle size.

Furthermore, by arranging the nozzle holes 8 point-symmetrically with respect to the axis C of the turntable 3, together with the constant discharge of molten metal, vibration generation of the turntable 3 can be suppressed, and high quality of the product can be ensured. Damage to equipment can also be prevented.

Regarding the production of powder materials, when the molten metal M is made to flow down the turntable 3, it is undesirable for the molten metal M to be instantaneously blown away from the board surface by the rotational force of the turntable 3; It is preferable to sequentially scatter the particles from the periphery of the turntable 3 using centrifugal force.

However, if the nozzle holes 8 are simply formed point-symmetrically, the molten metal M will be easily splashed off the surface of the turntable 3, but if the nozzle holes 8 are formed to be inclined along the rotation direction of the turntable 3, By this, even if the molten metal M is flowed down under pressure,
The turntable 3 becomes more susceptible to the molten metal M,
Product quality can be improved.

Further, since the nozzle plate 7 is made detachable, it can be easily replaced, and it is also possible to change the nozzle plate to a nozzle plate having nozzle holes of different diameters depending on other properties such as the viscosity of the molten metal M.

[Effect of idea]

In summary, the present invention provides the following excellent effects.

(1) Since the molten metal is pressurized by the pressurizing means and discharged from the nozzle hole, it is possible to control the amount of molten metal flowing down to the turntable, allowing a fixed amount of molten metal to be supplied and keeping the amount of molten metal on the turntable constant. This makes it possible to suppress fluctuations in rotational speed and produce powdered metal materials with uniform particle sizes.

(2) Since the nozzle holes are arranged point-symmetrically with respect to the axis of the turntable, it is possible to suppress the vibration of the turntable by supplying a constant amount of molten metal.
It can improve product quality and prevent equipment damage.

(3) Since the nozzle holes are arranged so as to be inclined along the direction of rotation of the turntable, it is possible to prevent molten metal from splashing on the turntable, thereby improving product quality.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a preferred embodiment of the present invention, Fig. 2 is a plan view of a nozzle plate adopted in the present invention, and Fig. 3 is a nozzle hole formed in the nozzle plate at an angle. FIG. 4 is a plan view showing this, FIG. 4 is a sectional view taken along the - line arrow in FIG. 3, and FIG. 5 is a schematic diagram of the rotary powder material manufacturing apparatus. In the figure, 3 is a turntable, 4 is a container, 5 is a discharge port, 7 is a nozzle plate, 8 is a nozzle hole, 10 is a ram illustrated as a pressurizing means, and C is the axis of the turntable.

Claims (1)

[Scope of utility model registration request] In a molten metal supply device of a rotary powder material manufacturing apparatus, which has a container for storing molten metal, and produces powdered metal material by scattering the molten metal that has flowed down from the container onto a rotating turntable by centrifugal force, forming a nozzle hole in the bottom of the container, facing the turntable and discharging the molten metal symmetrically with respect to the axis of the turntable and inclined along the rotational direction of the turntable;
A molten metal supply device for a rotary powder material manufacturing apparatus, characterized in that the container is provided with a pressurizing means for pressurizing and discharging molten metal in a fixed amount.