KR960003236Y1 - Shieving device - Google Patents

Abstract

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Description

Recovery phosphor sieve device

1 is a schematic cross-sectional view showing a conventional phosphor recovery method.

2 is a schematic cross-sectional view showing the inventive devising device.

3 is a plan view of main parts showing preferred configurations of the grinding roll of FIGS. 3A to 3C.

* Explanation of symbols for main parts of the drawings

1: shieve 2: inclined plate

3: vibration motor 6: hopper

7: crushing roll R: lump of (recovered) phosphor

The present invention relates to the production of color-brown tubes, and more particularly to a sieving device for the recovery phosphor.

The method used for manufacturing the fluorescent surface of the color CRT is mainly based on a photolithography method. To this end, a coating film of a predetermined phosphor is formed on a panel, and then a shadow mask is exposed to a disc. How to wash. Meanwhile, a method of forming a phosphor coating film having a uniform thickness on the inner surface of a panel is performed by injecting a slurry into the inner surface of the panel, rotating the panel at a predetermined speed, dispersing the phosphor slurry for centrifugal force, and then drying the spin coating. That's how.

In such a spin coating, a slurry cover is placed on the spinned panel to prevent the surrounding contamination and slurry waste caused by the slurry scattered by centrifugal force to return the recovered slurry to the matia tank. do.

This process is performed sequentially for each phosphor of R. G. B. Many phosphor slurries are dropped and dried in the application position of each phosphor despite the collection cover. Accordingly, it is common to receive a phosphor slurry that drops a sheet around the phosphor application position. Over time, the sludge that has dropped on the sheet also dries and remains, which is usually disposed of.

However, since R phosphors are several times more expensive than G. B phosphors, it is preferable to recover them and reuse them. The R phosphors are extracted by physically or chemically treating the recovered R phosphor masses.

The physical recovery method of the R phosphor was conventionally performed in the same manner as in FIG. In other words, the recovered phosphor lump R is placed in a predetermined pulverization container V, and the worker crushes it with a pulverization rod P. When the pulverization proceeds sufficiently, the hopper of the sieve device (hopper) 6 Transfer to fur.

Then, when the sieve device is operated, a separating net 1 supported on the elastic support means 5 vibrates by the vibration motor 3 and sieves the pulverized phosphor R '. The classified phosphor is discharged to the discharge port 4 along the inclined plate 2.

By the way, in the conventional phosphor recovery method, the solidified phosphor mass (R) has to be pulverized manually by the operator, so that the pulverization takes a long time and the work intensity is very high. Particularly, the dust of the phosphor is generated during the grinding and conveying process. Phosphorus compounds contained in the phosphors are known as a representative carcinogen, and have been a serious threat to the health of workers. In addition, since the amount of mass remaining on the sieve 1 was large, the recovery efficiency was not very high.

In view of the above-mentioned problems, the object of the present invention is to provide a sieve of a recovery phosphor having a short recovery time, no generation of dust, and a very high recovery efficiency.

In order to achieve the above object, the sieve device according to the present invention is supported on an elastic support means and includes a sieve for classifying phosphors, an inclined plate for guiding the classified phosphors to an outlet, and a vibration motor for vibrating the sieve and the inclined plate. In the sieve of the recovered phosphor, a pair of grinding rolls for pulverizing the phosphor mass is provided at the lower portion of the hopper, characterized in that the pulverization and classification of the recovered phosphor mass are performed simultaneously.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 2, the sieve device according to the present invention includes a sieve 1 supported on the elastic support means 5 as in the related art, an inclined plate 2 for guiding the classified phosphor toward the discharge port 4 side, The vibration motor 3 which vibrates these is provided. The lower part of the hopper 6 on the sieve 1 is provided with a pair of crushing rolls 7 which crush the phosphor mass R introduced into the hopper 6 according to the present invention feature. The grinding roll 7 is to pulverize the phosphor mass R rotated by a motor such as a motor (not shown) and introduced therebetween, and may have, for example, a configuration as shown in FIG.

In FIG. 3, firstly, FIG. 3a is a configuration in which two cylindrical grinding rolls 7 are arranged in parallel with each other, and b is a grinding roll 7 'having respective projectedrims 8 engaged with each other. On the other hand, FIG. 3C is a toothed grinding roll 7 '' having teeth formed to engage with each other on the outer circumference of the protruding edge 8 'in order to improve the grinding force in the configuration of FIG. 3B.

Although not shown separately, it is preferable to provide a spring or adjusting screw or the like to adjust the gap between the pair of grinding rolls 7, 7 ′, 7 ″ or the pressing force thereof.

Referring back to Figure 2, it will be described the operation of the present invention sieve device of the above-described configuration.

When the agglomerates R of the recovered phosphors such as the R phosphors are collected from the phosphor application position, they are put into the hopper 6 as they are and the operation of the grinding roll 7 is started. Then, the phosphor mass R is pulverized by the grinding roll 7 and falls onto the sieve 1, and the phosphor sorted by the vibration of the vibration motor 3 is discharged to the discharge port 4 along the inclined plate 2. do.

As such, according to the present invention, it is unnecessary to separate grinding work by manpower, thereby reducing the work force and significantly reducing the time required for physical recovery of phosphors such as sieves. Particularly, dust is not scattered to the outside, which inherently prevents the problem of worker's health or pollution.

Accordingly, the present invention has a great effect on improving productivity and working environment of color CRT production.

Claims (1)

A hopper (6) comprising a sieve supported on an elastic support means for classifying phosphors, an inclined plate for guiding the classified phosphors to the discharge port, and a vibration motor for vibrating the sieve and the inclined plate. And a pair of grinding rolls (7) for pulverizing the fluorescent substance mass (R) at the lower part thereof, to simultaneously perform the pulverization classification of the recovered fluorescent substance mass.