JPS62244477A - Vibrating screen - 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 (Field of Industrial Application) The present invention relates to a vibrating sieving device for sieving powder and granular materials such as paints and ceramic materials, in particular, a vibrating sieving device for sieving powder and granular materials such as paints and ceramic materials, and in particular, a vibrating sieving device for sieving powder and granular materials such as paints and ceramic materials. This invention relates to an in-plane reciprocating type vibrating sieve device that applies vibrations having a vibration component in a direction parallel to the above.

(Prior Art) This type of conventional vibrating sieving device supports a sieving wire mesh horizontally or inclined on the sieve body, and has one or two counterway type pie breaks on the sieve body.
The screen is generally configured such that the pie break causes the vibrations to cause the sieving screen to vibrate.

However, in the conventional vibrating sieving device of this type, the vibration component in the longitudinal direction is relatively small, and therefore, depending on the properties of the material to be processed, a large amount of light powder or fine powder with low bulk specific gravity can be processed. In this case, the powder layer becomes thick and the stratification effect does not occur reliably, and the powder and granules get stuck in the wire mesh and clog it, and sometimes the powder and granules stay locally on the wire mesh. As a result, there is a problem that the sieving efficiency becomes low.

In addition, in a structure in which the wire mesh is tilted several degrees to the horizontal and supported on the sieve body, a large vibrational force is constantly applied to the screen surface in the vertical direction, creating a strong air flow on the screen surface. Not only does the sieving efficiency decrease because there are few opportunities for the powder to float and come into contact with the screen surface, but the vertical component of the back-and-forth vibration of the sieve body causes large secondary vibrations on the thin surface, shortening the life of the wire screen. There was a problem.

(Problems to be Solved by the Invention) The present invention aims to solve the above-mentioned problems by eliminating clogging caused by powder and granules, and improving the dispersion effect of powder and granules and the good stratification effect. The purpose of the present invention is to provide a vibrating sieving device with high sieving efficiency.

(Another Means to Solve the Problems) According to the present invention, in order to achieve the two objectives, the sieve is sieved on a vertical line C passing through the center of gravity of the sieve body 2 supporting the sieving wire mesh 1 as shown in the drawing. The device is characterized in that counterweight type pie breaks 3 and 4 are respectively provided below the main body, and a driving device is provided to rotate these vibrators 3 and 4 synchronously in opposite directions.

Further, according to the present invention, the sieving wire mesh 1 is pivoted at the powder and granular material input [] side end 1a to the horizontal pivot shaft 5, and the outlet side end 1h is connected to the vertical vibrating device 6. It is preferable to configure it so as to give a low frequency vibration of a minute angle with the horizontal position being one limit.

(Function) According to the present invention, the horizontal back-and-forth vibration component of the sieving wire mesh is significantly increased by the above-mentioned structure, and it is possible to impart almost perfect horizontal vibration to the sieving wire mesh. The powder and granules introduced through the inlet are moved forward along the mesh surface, significantly reducing the occurrence of clogging, increasing the dispersion effect, and creating a stratification effect.

Furthermore, the sieving efficiency can be further improved by adjusting the amplitude and frequency of the vertical vibrator connected to the outlet side end of the sieving wire mesh according to the properties of the granular material to be treated.

(Embodiment) FIG. 1 shows one embodiment of the present invention, and in the example shown in the drawing,
The sieve body 2 supporting the sieving wire mesh 1 is configured in a box shape, and the sieve body 2 supporting the sieving wire mesh 1
The upper lid 10 of the sieve body 2 is located above the vertical line C passing through the center of gravity of the sieve body 2.
And counterweight type pie break on the bottom plate - 3
, 4 are installed respectively, and these pie breaks-3
, 4 are synchronously rotated in opposite directions at the same speed by motors (not shown), thereby generating vibrations in the horizontal direction parallel to the narrow surface due to self-synchronization.

The sieve body 2 has an upper lid 1 at one end 2a in its length direction.
0 is provided with an input port 12 for the granular material to be processed, and a discharge port 13 for the sieve granules is provided in the bottom plate 11 at the other end 2b, and the sieve body prevents its vibrations from being transmitted to the foundation 14. Therefore, it is supported by an anti-vibration spring 15.

The sieving wire mesh 1 is attached to a mesh frame 16 and extends in the length direction within the sieve body 2, and its powder inlet side end 1a is pivotally supported on the sieve body 2 by a horizontal pivot shaft 5. The outlet end IC is supported to be moved up and down by a vertical vibrating device 6 at the outlet side end 1b, and the outlet end IC passes through the outlet 18 of the sieve powder and granules, which is opened in the end wall j7 of the sieve body 2, to the outside of the sieve body 2. The sieved soil powder is ejected from the outlet end I.
It is configured to be discharged from C.

The vertical vibration device 6 is configured to apply minute angular vibrations of several degrees with the horizontal position as the upper limit to the sieving wire mesh at a long period of about 1 to 20 cpm, and in the illustrated example, it vibrates the crankshaft 20, the link 21, and the crank. Although it consists of a motor drive (not shown) that rotates at a low speed, any suitable vibrating device such as a cam and cam roller may be used. It is preferable that the vibration angle, vibration frequency, etc. of this "1-lower vibration device" be adjustable so that the optimum "1-lower vibration" can be applied in accordance with the properties of the granular material to be treated.

In operation of the apparatus constructed as described above, the sieve body 2 is caused to vibrate back and forth in the horizontal direction by synchronously rotating the upper and lower pie breaks 3 and 4 in opposite directions at the same speed. Therefore, the screen frame 16 attached to the sieve body 2 by the pivot shaft 5, and therefore the sieve wire mesh 1, vibrate back and forth in the horizontal direction due to the vibration of the sieve body 2.

Inputting the sieving wire mesh 1 vibrating in this way [
] When the granular material to be treated is fed into the side end 1a-1- from the input port 12, the granular material moves forward along the mesh surface due to the back and forth vibration of the narrow surface, and is sequentially sieved during that time, so that particles smaller than the narrow surface are successively sieved. The particles pass through the mesh of the wire mesh 1 and fall onto the bottom plate 11'' of the sieve body 2, and the particles on the sieve are sent forward on the bottom plate 1 by the vibration of the sieve body 2 and are discharged from the discharge port 13. On the other hand, sieve-Jl1 particles larger than the mesh are discharged from the outlet end 1c of the sieving wire mesh 1.

For example, when processing a large amount of light and fine powder such as ceramic powder, use a 200-mesh sieving wire mesh and set the frequency of the High Break-3 to 750c.
pm, thereby producing horizontal vibration with an amplitude of 24 mm. Furthermore, the narrow surface was vibrated downward at an angle of 5 degrees with the horizontal position as the upper limit using the lower vibration device 6. Qcp
By applying the vibration at a frequency of m, low-frequency vibrations are added in the vertical direction to the net surface, thereby producing intermittent secondary vibrations on the thin surface, and creating a granular material with a double-stranded appearance. can be efficiently screened by stratification without causing local stagnation.

(Effects of the Invention) According to the present invention, high sieving efficiency can be obtained due to the large dispersion effect of the powder and the good stratification effect.

[Brief explanation of drawings]

The drawing is a diagrammatic longitudinal section through a vibrating sieve device according to the invention. 1... Sieving wire mesh 2... Sieve body 3.4.
・・Pie break−

Claims (1)

[Claims] 1. Counterweight vibrators are installed above and below the sieve body on a vertical line passing through the center of gravity of the sieve body supporting the sieving wire mesh, and a drive device is provided to rotate these vibrators synchronously in opposite directions. A vibrating sieving device characterized in that it is provided with: 2. The end of the sifting wire mesh on the inlet side of the powder and granular material to be processed is pivoted to a horizontal pivot shaft, and the vertical vibration device that gives minute angular vibrations to the sifting wire mesh with the upper limit of the horizontal position is connected to the outlet end. An apparatus as claimed in claim 1 characterized in: