JP2003093974A - Vibrating sieve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibrating sieve device in which clogging of metallic meshes of the device is reduced and minute powder having similar powder diameters are efficiently obtained. SOLUTION: A plurality of rings 11 is provided on a metallic mesh 1 of the device. Each of the rings 11 has a hollow cylindrical shape and a plurality of holes are provided on the side surface of the rings.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating and sieving apparatus used for producing, classifying and removing foreign matter, and more specifically, applying high frequency vibration to a metal mesh for sieving powder. The present invention relates to a vibration screening device having a configuration.

[0002]

2. Description of the Related Art For example, in the manufacturing process of a fixing roller used in an electrophotographic image forming apparatus such as a copying machine, an aluminum alloy material is formed into a cylindrical long roller, and the roller is formed into a predetermined length. To make a short roller core metal, and to make the release layer adhere to its outer peripheral surface, roughen the surface by cutting or grinding, then form the release layer and finish the finished product. Get the fixing roller. In particular, the formation of the release layer means electrostatically coating conductive Teflon (registered trademark) powder, and the powder adheres to the surface of the cored bar with a potential applied. A Teflon layer having high releasability is formed by heating up to. Therefore, when electrostatically coating powder, the ratio of the powder adhering to the core metal is approximately 30 to 4 when the weight amount of the powder adhering amount to the core metal is the discharge amount of the powder.
It is 0%, and the rest does not adhere.

Under the present circumstances, normally, the powder which does not adhere is collected by a collecting machine having an exhaust blower and a filter, and the powder is recycled and used again for electrostatic coating. In particular, in the fixing roller, unevenness occurs on the surface of the Teflon layer due to the diameter of the powder and the inclusion of foreign matter in the powder, and the toner sticks to the unevenness resulting in scumming and white spots due to non-fixing. Since there is a problem that the fixing quality is deteriorated, the powder collected for recycling removes the agglomerates of the powder and the foreign substances mixed in the recovery path through the metal mesh. In addition, the metal mesh increases the efficiency of the screening by applying vibration with the vibration screening device.

In recent years, in order to improve the quality of the surface of the Teflon layer of the fixing roller, electrostatic coating with fine powder having a uniform powder diameter has been used to stabilize the surface roughness and reduce irregularities. . Specifically, we have improved the quality by raising the count of the vibrating mesh and passing it through a finer mesh. However, increasing the count makes it easier for the powder to become clogged with the metal mesh, and as a result, it is discharged without passing through the metal mesh, and the powder cannot be supplied in time, so the electrostatic powder coating process must be stopped. However, there is a problem that productivity is lowered.

In the clogged metal mesh, a plurality of rubber balls are put in a casing of a vibrating sieve in which the metal mesh is stretched, the rubber balls bounce due to the vibration of the vibrating sieve, and the rubber balls directly hit from the lower side of the metal mesh. , The impact has been dealt with by configuring so that the clogging is crushed.
However, if the metal mesh is used for a long time, the clogging of the metal mesh grows in a very small amount, and there is a problem that the above-mentioned defects cannot be solved.

[0006]

FIG. 4 is a view showing the traveling direction of the powder on the metal mesh 1 of the vibrating screen device. Depending on the eccentricity of the eccentric weight, the traveling direction of the powder on the metal mesh 1 is classified into the inward direction of FIG. 4A and the outward direction of FIG. 4B. Normally, when the powder moves outward, agglomerates and foreign substances of the powder tend to remain in the center of the metal mesh 1 and are not discharged, and the powder to be sieved is discharged. It is often used in an eccentric state in which is moving inward.

As described above, a plurality of rubber balls 2 are put under the metal mesh 1 and the clogging is reduced by colliding with the metal mesh 1 by a jump due to vibration. Still, the reason why the clogging progresses is that the metal mesh 1
That is, the impact of the rubber ball 2 is absorbed by the tension of, and the powder clogged in the center of the metal mesh 1 is less likely to fall due to the inward flow. FIG. 5 shows a clogging distribution of powder on the metal mesh 1.

In view of the above problems, an object of the present invention is to provide a vibrating screen device which can reduce clogging of a metal mesh of the vibrating screen device and can efficiently obtain fine powder having a uniform powder diameter. To do.

[0009]

In order to solve the above-mentioned problems, the present invention according to claim 1 applies a high-frequency vibration to a metal mesh to apply a screening, and a jumping object jumped by the vibration is a metal mesh. In the vibrating screen device configured to collide with the lower surface of No. 1 to promote the screening efficiency, a colliding object facing the jumping object is placed on a metal mesh. According to a second aspect of the present invention, there is provided the vibrating screen device according to the first aspect, wherein a plurality of colliding objects are placed on a metal mesh. The present invention according to claim 3 provides
The vibrating screen device according to claim 1 or 2,
The vibrating screen device is characterized in that the colliding object has a hollow cylindrical shape. The present invention according to claim 4 relates to claim 1
The vibrating screen device described in any one of (1) to (3) is characterized in that the colliding object has a plurality of holes on its side surface. The diameter of the hole must be large enough not to clog the powder.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the basic configuration of a vibrating screen device. In the vibrating screen device, the eccentric weight 8 is fixed so as to be eccentric to the rotary shaft of the rotary motor 9 mounted on the pedestal, and the eccentric weight 8 is eccentric by the rotation of the rotary motor 9 to provide a vibrator function for giving vibration. I have it. The powder to be sieved is charged from the powder charging port 3, passes through the metal mesh 2 and is discharged from the screening powder outlet. The rubber ball 2 as a jumping object,
It jumps due to vibration, collides with the lower surface of the metal mesh 1 to prevent clogging, and crushes the clogging that has been completed.

In the present invention, a backup function is added on the metal mesh 1 in order to easily transmit the impact of the rubber ball 2 to the metal mesh 1. FIG. 2 is a plan view showing the configuration of the present invention. A plurality of hollow cylinder-shaped colliding object rings 11 are placed on the metal mesh 1 and laid out so as to surround the center and the periphery of the metal mesh 1 as shown in FIG. When vibration is given, the outer ring 11 rotates around the outer periphery of the ring 11 located at the center while rotating on its own axis. Also, a rubber ball 2
Due to the vibration caused by the collision, the ring 11 also jumps and vibrates.

3A and 3B are views showing the structure of the ring 11, wherein FIG. 3A is a perspective view and FIG. 3B is a sectional view. A small-diameter hole 12 is provided on the side surface of the ring 11 so that the powder does not stay in the ring 11. Rubber ball 2
The impact of the collision is transmitted to the ring 11, the ring 11 makes a minute jump and rotates, and the powder is caught and discharged from the hole 12, thereby activating the flow of the powder on the metal mesh 1 and clogging. Can be reduced. Ring 1
1 is preferably formed of a resin material from the viewpoint of manufacturing cost and the like.

According to the present invention shown in FIGS. 2 and 3, the metal mesh 1 is provided even in the eccentric state where the powder advances inward.
The powder gathered at the center of the can be conveyed in the outer peripheral direction with relatively less clogging, and the screening efficiency can be increased. In addition, the vibration of the collision of the rubber ball 2 is transmitted to the ring 11, and the metal mesh 1 vibrates even when the ring 11 jumps. Therefore, the amplitude of the metal mesh 1 becomes fine, and the vibration is easily transmitted to the powder, which causes clogging. Is reduced.

[0014]

As described above, according to the present invention as set forth in claim 1, when a rubber ball, which is a jumping object, collides from the lower surface of the metal mesh, it is transmitted to the collision object through the metal mesh, and the collision object also jumps. Since the metal mesh is vibrated by vibrating the metal mesh, it is possible to provide a vibrating screen device in which clogging is reduced by applying an impact above and below the metal mesh.
Further, it is possible to separate agglomerates and foreign substances in the fine powder, and the particle size of the powder after sieving becomes uniform, so that the quality is improved. Further, according to the present invention described in claim 2, by providing a plurality of colliding objects on the metal mesh, the flow of powder on the metal mesh is activated, and a vibrating screen device in which clogging is reduced is provided. can do. Further, according to the present invention as set forth in claim 3, since the colliding object is a hollow cylindrical ring, the surface of the metal mesh is rotationally moved by vibration while holding the powder in the ring, so that a wide range of It is possible to apply a sieve on the metal mesh, and it is possible to provide a vibrating sieve apparatus with improved efficiency of the sieve. Further, according to the present invention described in claim 4, by providing a plurality of holes on the side surface of the ring, it is possible to convey the powder in the outer peripheral direction of the metal mesh without retaining in the ring. Therefore, it is possible to provide a vibrating screen device in which the screening efficiency is further improved and clogging is reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the basic configuration of a vibrating screen device.

FIG. 2 is a diagram showing a layout of rings.

FIG. 3 is a diagram showing the structure of a ring, (a) is a perspective view,
(B) It is a top view.

FIG. 4 is a diagram showing a moving direction of powder on a metal mesh, and is a diagram showing (a) an inward direction and (b) an outward flow.

FIG. 5 is a diagram showing a clogging distribution of powder on a metal mesh.

[Explanation of symbols]

1 metal mesh 2 rubber balls 3 Powder input port 4 lid 5 Metal mesh fixing bolt 6 dust outlet 7 Flue powder outlet 8 Eccentric weight 9 rotation motor 10 springs 11 ring 12 holes

Claims (4)

[Claims] 1. A vibrating sluice device configured to apply high-frequency vibration to a metal mesh to apply a sluice, and to cause a jumping object that jumps due to the vibration to collide with the lower surface of the metal mesh to promote the sieving efficiency. An oscillating sieving device, characterized in that opposing colliding objects are placed on a metal mesh. 2. The vibrating screen device according to claim 1, wherein a plurality of colliding objects are placed on a metal mesh. 3. The vibrating screen apparatus according to claim 1, wherein the colliding object has a hollow cylindrical shape. 4. The vibrating screen apparatus according to claim 1, wherein the colliding object has a plurality of holes on its side surface.