JPS60168548A - Powder extraction apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a powder discharge device for discharging pulverized powder from, for example, a crushing cylinder of a vibrating mill.

Conventionally, a vibrating mill has generally been constructed as shown in FIG. Here, a is a crushing tube with the inside as a crushing chamber, 0 is a raw material input port provided at the top of the crushing tube a, and d is a port for a large number of crushings fed into the crushing chamber. It is pulverized as a result of the vibration of a. The pulverized powder is discharged from the pulverizing chamber by opening the discharge port e while vibrating the pulverizing cylinder a.

However, the vibration mill with the above configuration has the disadvantage that it takes approximately 2 hours to discharge the powder if it has a typical internal volume, and there is a desire to shorten the discharge time compared to before. Incidentally, it is generally known that powder exhibits behavior similar to that of a fluid when subjected to vibration.

Therefore, in recent years, an air discharge port f (indicated by a double-dotted dot in Fig. 1) is provided at the top of the crushing tube a, and when the powder is discharged, the crushing tube a
A structure has been considered in which the powder is vibrated and air is forced into the grinding chamber from the discharge port f, and the air pressure is used to push out the powder as if it were a liquid. However, although the powder discharge time can be shortened compared to the conventional method, the actual situation is that it still takes about 40 minutes.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a powder discharge device that can further shorten the discharge time. An air outlet is provided at the lower part of the other side, and the powder is discharged by being carried by the air flow flowing from the outlet to the discharge port at the lower part of the powder.

An embodiment in which the present invention is applied to a vibration system will be described below with reference to FIGS. 2 to 4. First, in FIGS. 2 and 3 showing the entire structure, 1 is a base, and 2 is four rows of support springs installed upright at the four corners of the left half of the base 10 in FIG.

A total of four support plates 3, two on each support spring 2, are fixed substantially perpendicularly to each of the support springs 2 located on the left and right sides.

Reference numeral 4 indicates two crushing cylinders, which have both left and right ends supported by the above-mentioned support tf.
! 3 are supported in a penetrating manner, and are provided in the shape of a horizontal shaft that is substantially horizontal, and each has a crushing chamber 5 serving as a processing chamber for crushing processing inside. Reference numeral 6 denotes an eccentric weight rotatably pivoted approximately at the center of the support plate 3 located at the right end. On the other hand, 7 is a support stand provided at the right end of the base 1, 8 is a motor mounted and fixed on the support stand 7, and the drive asaa of the motor 8 is connected to the axis 6a of the unbalanced weight fa6 via a universal joint 9. connected. Therefore, when the motor 8 rotates, the unbalanced weight 6 is rotated,
This causes the support plate 5 and hence the crushing cylinder 4 to vibrate. Now,
As shown in FIG. 4, the crushing cylinder 4 is provided with a raw material inlet 10 at the upper center thereof, which can be opened and closed by a lid 11, and a large number of crushing poles 12 are housed inside. has been done. A discharge port 13 for discharging the crushed powder is provided on one side of the crushing chamber 5, for example at the bottom of the left end plate 4a of the crushing tube 4, and this discharge port 15 is connected to the outlet of the pole 12. It can be opened and closed by a valve device 14 equipped with a strainer member (not shown) to prevent this.

On the other hand, the other side of the crushing chamber 5, for example, the right end plate portion 4 of the crushing cylinder 4
An air outlet 15 for discharging air for discharging powder into the grinding chamber 5 is formed in the lower part of b, and a connecting pipe 16 is connected to this air outlet 15. A discharge hose of a near compressor (not shown), for example, is connected to this connecting pipe 16, and air is sent into the grinding chamber 5 at a pressure of, for example, about 1 to 2 #/I when discharging the powder.

Next, the operation of the above configuration will be explained. Raw material input port 10
The raw material to be crushed is introduced, the lid 11 is closed, and the motor 8 is driven. In this case, since the crushing cylinder 4 vibrates, the raw material in the crushing chamber 5 may collide with the poles 12 or the poles 1
When it collides with the inner surface of the crushing cylinder 4 of No. 2, it is crushed and becomes a fine powder. In order to discharge the powder pulverized by this pulverizing operation from the pulverizing chamber 5, the valve device 14 of the discharge port 15 is opened while the motor 8 is driven to vibrate the pulverizing tube 4. and operate the near compressor. Then, air is discharged from the exhaust port 15 of the crushing cylinder 4 into the crushing chamber 5, so that the powder in the crushing chamber 5 flows toward the discharge port 13 side and sequentially passes through the discharge port 15.
It is expelled vigorously.

By the way, in the case where the air outlet f is provided at the upper part of the crushing cylinder 8 as shown by the two-dot chain line in FIG. It took about 40 minutes. According to the studies of the present inventors, the reason why such a relatively long discharge time is required is as follows. That is, at the beginning of the discharge, as the air pressure inside the grinding chamber increases, the powder is vigorously discharged from the discharge port e due to the pressure, but the powder is first discharged from those near the discharge port e. Therefore, after a certain amount of time has passed, there is no powder in the vicinity of the discharge port C, resulting in a state as shown by the single-dot chain fiA in FIG. In this case, the air discharged from the discharge port f immediately flows toward the discharge port e, but the powder remains at the bottom of the air flow.
After that, the powder that collapses toward the discharge hole e side due to the vibration of the crushing tube a and the powder rolled up by the air flow are only discharged from the discharge port e, and the discharge speed rapidly increases. This means that it will decrease.

On the other hand, according to the present invention, when air is discharged from the discharge port 15, the powder near the discharge port 13 is first discharged as in the case described above, so that the powder is immediately discharged from the discharge port 15 at an early stage. A powder flow riding on the air flow towards 13 is generated. However, this flow of powder riding on the air flow is different from the one described above, as it is generated in the lower layer of the powder that accumulates.
The powder in the upper layer descends downward one after another and is constantly supplied to the flow section in the lower layer. This allows the powder to be discharged vigorously without reducing the discharge speed midway through.
The discharge time can be significantly reduced.

Incidentally, in the case of this example, when the crushing chamber 5 had the same volume as the conventional one, the powder could be discharged in an extremely short time of about 15 minutes, and the productivity could be greatly improved.

In the above embodiment, the exhaust port 15 is provided at the lower part of the right end plate 4b of the crushing cylinder 4, but the present invention is not limited to this. A configuration may be adopted in which an exhaust pipe is introduced into the grinding chamber 5 and opened at a lower portion of the grinding chamber 5 on the side opposite to the outlet 13. In addition, the present invention is not limited to the powder discharge device of a vibration mill, but may be applied to a drying device that stores powder such as powder in a processing chamber and performs drying processing therein, without departing from the gist. It can be implemented with various changes within the scope.

As described above, the present invention has an exhaust port in the lower part of one side of the processing chamber, and has an air processing feature in the lower part of the other side, so that the discharge port is provided in the lower layer of the powder in the processing chamber. Since it is possible to continuously form a flow of powder that rides on the airflow flowing toward the discharge port, it has the excellent effect of significantly shortening the time for discharging the powder.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing a powder discharge device in a conventional vibration mill, FIGS. 2 to 4 show an embodiment of the present invention, FIG. 2 is a side view of the vibration mill, and FIG. is the same front view, 4th
The figure is an enlarged longitudinal sectional view of the main part. In the figure, 4 is a crushing cylinder, 5 is a crushing chamber (processing chamber), 8 is a motor, 13 is an exhaust port, and 15 is an exhaust port. Applicant Shunsuke Goji Figure 1 Figure 2 Figure 3! Figure 4 1

Claims (1)

[Claims] 1. A device for discharging the powder in the processing chamber, including a discharge port provided at the bottom of one side of the processing chamber, and a discharge port provided at the bottom of the other side of the processing chamber to discharge air into the processing chamber. A powder discharge device comprising a discharge port for discharging into a room.