JPH0234673B2 - FUNMATSUSHIFUTA - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a powder sifter for sifting powders such as medicines and spices.

Structure of the prior art and its problems When it comes to powders such as medicines and spices, the raw materials are usually ground in a stamp mill. As is well known, the pulverized powder is then sequentially sieved and manufactured into a product. However, in the manufacturing process of this type of powder, there have traditionally been problems associated with sieving the powder. Until now, the powder had to be sifted by hand, but the process was not easy. In particular, continuous sieving of large amounts of powder is extremely labor-intensive. Therefore, it has been desired to automate this process and reduce the burden on the workers.

OBJECT OF THE INVENTION Therefore, the present invention has been made with the aim of solving the above-mentioned conventional problems and automating the sieving of powder.

Structure of the Invention According to the present invention, the top surface of a vacuum chamber is opened, the top surface opening is covered by a net conveyor, and the inside of the vacuum chamber is evacuated by a blower. Further, a rake is placed on the net conveyor and moved back and forth along the net conveyor. Then, the powder is sent by a net conveyor, the powder is absorbed by a vacuum chamber, the powder is pushed down by a rake, the powder is passed through the mesh of the net conveyor, sieved, and sucked into the vacuum chamber and blower. The feature is that the powder is discharged and sent by a blower.

Description of examples Examples of the present invention will be described below.

In the figure, this powder sifter has a vacuum chamber 1 whose top surface is open. As shown in FIG. 3, the vacuum chamber 1 consists of a pair of triangular plates 2 and a connecting plate 3,
It has a top opening 4 with a constant width. Then, the blower 5 is connected to the vacuum chamber 1, and the inside of the vacuum chamber 1 is evacuated by the blower 5. In this example,
The blower 5 has a suction pipe 6 and a discharge pipe 7. A hole 8 is formed in the triangular plate 2 of the vacuum chamber 1, and the suction pipe 6 is connected to the hole 8. Therefore, the inside of the vacuum chamber 1 can be evacuated by the blower 5 and the suction pipe 6. The discharge pipe 7 is connected to a cyclone tank. In addition, a manhole 9 is provided on the triangular plate 2 of the vacuum chamber 1, so that the inside of the vacuum chamber 1 can be easily cleaned.

Furthermore, this powder sifter is a net conveyor 10
and a hopper 11. net conveyor 10
is endless, has a mesh of a certain size, is arranged around the vacuum chamber 1, and is engaged with a head pulley 12, a swing pulley 13 and a return pulley 14. The top opening 4 of the vacuum chamber 1 is covered by the net conveyor 10, and the hopper 11 is provided at the starting end thereof. Therefore, when the net conveyor 10 is driven by the head pulley 12, the net conveyor 10 can be moved in the direction of arrow A and circulated. Further, as shown in FIG. 4, when raw materials such as medicines and spices are crushed by a stamp mill and the powder P is fed into the hopper 11, the powder P is supplied to the net conveyor 10.
Powder P is sent by. It is also possible to adjust the supply amount of the powder P using the adjustment plate 15 of the hopper 11, and also to adjust the thickness t.

Furthermore, this device has a number of rakes 16. As shown in FIG. 5, the rake 16 is made by bundling a large number of urethane fibers 17. At the upper end opening 4 of the vacuum chamber 1, each rake 16 is placed on the net conveyor 10, arranged at intervals, comes into contact with the net conveyor 10, and is operated by a drive mechanism, causing the rakes 16 to 16 reciprocates along the net conveyor 10. Second
As shown, the drive mechanism has a shaft 18 disposed between each rake 16. The shaft 18 has an arm 19 and a lever 20, which are rotatably guided, and the arm 19 and the lever 20 are fixed to the shaft 18. Each rake 16 is fixed to an arm 19, the lever 20 is transmission connected to a pin 22 of a rod 21, and the rod 21 is connected to a connecting rod 2.
1a and the crank arm 21b. Therefore, the connecting rod 21a and the rod 2 are connected by the crank arm 21b.
1 is driven and the rod 21 is reciprocated in its length direction, the shaft 18 rotates around its axis, and the rake 16 is reciprocated in the direction of arrow B.
It can be moved back and forth along the net conveyor 10. It is also possible to move the rake 16 back and forth across the entire width of the net conveyor 10.

Furthermore, this powder sifter has a number of air ejection pipes 23. As shown in FIG. 6, the jet pipe 23 has a jet groove 24 extending in the length direction, and is connected to an air supply source. and,
At the upper end opening 4 of the vacuum chamber 1, each ejection pipe 23 is provided below the net conveyor 10, and the ejection pipes 23 are arranged in the width direction of the net conveyor 10 and arranged at intervals. Spout groove 2
4 faces the net conveyor 10. Therefore, the air in the jet pipe 23 can be jetted out from the jet groove 24 and directed toward the net conveyor 10.

In addition, the powder sifter includes a scraper 25, a chute 26 and a vibrator 27. The creper 25 is of a fixed type or a rotary type, and scrapes off the powder P adhering to the net conveyor 10.
The chute 26 is for discharging the scraped powder P, and is connected to a rotary valve 28. The vibrator 27 is used to vibrate the net conveyor 10 on which the powder P has adhered and clean it.

Therefore, in this powder sifter, when the inside of the vacuum chamber 1 is evacuated by the blower 5 and the powder P is sent by the net conveyor 10, the vacuum chamber 1 is
Powder P is sucked by. At the same time, each rake 16 moves back and forth along the net conveyor 10, and the powder P is pushed down by the rake 16. Therefore, the powder P passes through the mesh of the net conveyor 10, is sieved, and is sucked into the vacuum chamber 1.

Furthermore, in the case of this powder sifter, when the powder P is pushed down by the rake 16, a gap of the powder P is formed at that portion. Then, the air from each jet pipe 23 is jetted out from the jet groove 24, and the powder P is blown up by the air, and the powder P is sucked from the gap between the powder P and sucked into the vacuum chamber 1. This action is repeated continuously. Therefore, clogging of the net conveyor 10 can be prevented, and the powder P can be effectively screened and sucked.

Thereafter, the powder P passes through the vacuum chamber 1 and the suction pipe 6 and is sucked into the blower 5. and,
The powder P is discharged by the blower 5, and the powder P passes through the discharge pipe 7 and is sent to the cyclone tank.

The powder P that is not sucked into the vacuum chamber 1 is scraped off by the scraper 25 and falls into the chute 26. The powder P is then discharged along the chute 26, fed to the rotary valve 28, sent to the stamp mill and ground again.

Effects of the Invention As explained above, in this invention, the powder P is sent by the net conveyor 10, the powder P is sucked by the vacuum chamber 1, and the powder P is pushed down by the rake 16. , the powder P can be automatically sieved, and the intended purpose can be achieved.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the invention, Fig. 2 is a side view showing an embodiment of the present invention;
The figure is a plan view of the powder sifter in Figure 1, and Figure 3 is a top view of the powder sifter in Figure 1.
Figure 4 is an explanatory diagram showing the relationship between the hopper and net conveyor in Figure 1, Figure 5 is a front view of the rake in Figure 1, and Figure 6 is the air jet in Figure 1. It is a perspective view of a pipe. 1...Vacuum chamber, 4...Top opening, 5...Blower, 10...Net conveyor, 16...Rake.

Claims (1)

[Scope of Claims] 1. A vacuum chamber with an open top surface; a blower connected to the vacuum chamber to evacuate the inside thereof; a net conveyor covering the top opening of the vacuum chamber; and a top of the net conveyor. a rake disposed in the net conveyor; and a drive mechanism for reciprocating the rake along the net conveyor, the powder is sent by the net conveyor, the powder is sucked by the vacuum chamber, and the powder is sucked by the rake. thereby pushing down the powder, passing the powder through the mesh of the net conveyor, sifting it, and sucking it into the vacuum chamber and the blower;
A powder sifter characterized in that the powder is discharged and sent by the blower.