KR940002757Y1 - Sludge collection device for crt - Google Patents

Abstract

No content.

Description

Slurry recovery device of cathode ray tube

1 is a side view of the slurry recovery device according to the present invention.

2 is a plan view of the slurry recovery device according to the present invention.

3 is a perspective view of a typical cathode ray tube fluorescent surface manufacturing apparatus.

4 is a side view of a conventional slurry recovery device.

* Explanation of symbols for main parts of the drawings

10 panel 16, 26 recovery fan

17, 27: chute 21, 22: cylinder

20: fixed shaft 23: ring band

24: hollow shaft 25: link

28: rotary cylinder

The present invention relates to a slurry recovery device for recovering excess slurry in the production of fluorescent screen of the cathode ray tube, and more particularly, to a slurry recovery device used in the application and recovery step in the conventional slurry method for applying the slurry on the fluorescent surface.

Usually, the slurry method is used as a method of manufacturing a fluorescent surface on the inner surface of the panel of a cathode ray tube. For example, a slurry in which a green fluorescent material is suspended in a photoresist in which an aqueous polyvinyl alcohol (PVA) solution is added to an ammonium bichromate (ACD) solution is rotated while the inner surface of the panel is inclined upwards, and the amount is not sufficient to cover the inner surface of the panel. Excess slurry is injected into the inner surface of the panel to rotate and flow to every corner of the panel. Next, the slurry is ejected from the panel by centrifugal force by rotating the panel at high speed, and is recovered to a recovery fan having a diameter slightly larger than the panel and an annular transverse wall and a chute at the bottom thereof. Next, the slurry coated on the panel is dried by an infrared heater while the inner surface of the panel faces almost laterally. After drying, a shadow mask is attached to the panel, the panel is placed on an exposure table, and infrared rays are irradiated to the panel through a shadow mask from a light source of linear or linear shape which can prevent ultraviolet rays. As a result, the part exposed to ultraviolet rays hardens | cures and does not melt | dissolve in water, the part which is not exposed to ultraviolet rays hardens | cures and does not melt | dissolve in water, and the part which is not exposed to ultraviolet rays dissolves in water. After this process, the shadow mask is removed from the panel and blown and developed while rotating with the inner surface of the panel facing sideways. By development, portions which were not exposed to ultraviolet rays are dissolved and removed, and a mosaic-shaped phosphor gum is formed on the panel, and the panel is dried by infrared rays. In the same manner, blue and red phosphors are molded on the panel. Finally, an aqueous acrylic resin emulsion solution is injected into the inner surface of the panel, and excess liquid is removed by high speed rotation, followed by infrared drying to form an organic film.

As a conventional fluorescent surface fabrication apparatus to which such a slurry method is applied, the apparatus as shown in FIG. 3 and FIG. 4 is used.

3 is a perspective view showing an outline of a fluorescent surface manufacturing apparatus, and as can be seen from the drawings, rails 1 and 2 formed of two sets of L-shaped steels, which are used as reference, are arranged in a vertical parallel relationship. The rail 1 is for suspension of the carrier 3, and the rail 2 on the lower side is used for horizontal stability of the carrier 3. It is used for horizontal stabilization of a pair of frames 4 formed using steel pipes. Suspension rollers 5 are mounted at the vertical upper end of the pair of frames 4 formed by using steel pipes, and guide rollers 6 are respectively rotatably installed at the lower end thereof to obtain a stable running state. 5) the rail 1, the stabilizing guide roller 6 is configured to rotate in contact with the side of the rail (2), respectively.

In addition, a bent portion 19 that is bent at substantially right angles is formed at the tip of the inclined arm of the flame 4, and the panel support shaft 7 is rotatably connected to the tip of the bent portion 19. A friction pulley 8 is rotatably attached to the rear end of the panel support shaft 7, and the rotation shaft of the friction pulley 8 is distal to an inner space of the panel support shaft 7 in which an inner space is formed. At the tip end, a retaining device 9 for supporting the panel is attached. On the other hand, along the said rail (1) (2), two sets of guide rails (11) (12) for inclination of a panel are arrange | positioned maintaining the three-dimensional parallel state. The guide rails 11 and 12 for tilting the panel form a so-called three-dimensional cam, which is twisted three-dimensionally in correspondence to the tilt angle of the panel at the position where the panel 10 is to be tilted.

On the side surface of the panel support shaft 7, a guide roller 13 is rotatably provided between two sets of guide rails 11 and 12 for tilting the panel. Therefore, the panel support shaft 7 can be inclined in response to the running of the carrier 3 and the twisting of the guide rails 11 and 12 for tilting the panel. That is, the panel 10 is in a state in which the inner surface of the panel 10 faces upward in the position shown on the left side in FIG. 3, and in the position shown in the right side in FIG. 3, the inner surface of the panel 10 is in the side. The inclination angle can be freely changed so as to be in a direction toward the direction.

Then, the movement of the carrier 3 which rotates the panel while the panel is running can be performed according to a constant index, and at the stop position, as shown in FIG. 3, the friction pulley 14 of the motor 15 The panel can be rotated at a predetermined speed by mutual contact driving of the friction pulley 8 located at the rear end of the panel support shaft 7.

In the fluorescent surface manufacturing apparatus according to the slurry method of this structure, the carriers 3 are interconnected to form prue, and the sequential work is performed at predetermined time intervals.

Figure 4 is a side view showing an embodiment of a conventional slurry recovery device, as can be seen through the drawings, when excess slurry is moved to the recovery device, and has a slightly larger diameter and annular transverse wall than the panel, the lower end portion Even if the recovery fan 16 with the chute 17 falls, excess slurry is recovered from the recovery fan to the slurry feeder (not shown) via the hose 18.

Since the above-described conventional slurry recovery device is made in a single form, the new recovery fan needs to be replaced after a temporary suspension of work during the replacement of the recovery fan, which causes a delay in production and a decrease in production. In Korea, a large collection fan causes safety accidents, and many situations such as collision with other facilities are scattered during replacement work.

The present invention is to solve the above-mentioned conventional problems, by installing two of the same type of recovery fan in the rotating shaft to prevent the suspension of work and reduction of production according to the replacement process of the recovery fan, and It is an object of the present invention to provide a slurry recovery device configured to prevent safety accidents.

In accordance with the above object, the present invention supports a slurry recovery device and a fixed shaft forming a rotational center, a rotatable hollow shaft, a ring band rotating up and down and rotating together with the hollow shaft, and rotating the hollow shaft and the ring band. A rotary cylinder for constituting the central axis of the recovery device, and also connected to the ring band to operate the recovery fan, two recovery fans for recovering excess slurry, and excess slurry from the recovery fan A chute for recovering with a feeder, a cylinder supported by the hollow shaft for adjusting the distance to the shaft at the time of mounting the recovery fan, and a link for maintaining the recovery fan at a constant distance from the shaft. Provided is a slurry recovery apparatus for a cathode ray tube.

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

1 is a side view showing an embodiment of a slurry recovery device according to the present invention.

As can be seen through the drawings, the present invention supports a slurry recovery device and a fixed shaft 20 forming a rotation center, a hollow shaft 24 supported on the fixed shaft 20 and rotatable, and the hollow shaft ( As a rotary cylinder (28) located on the fixed shaft (20) while rotating together with the ring (23) and the ring band (23) operating up and down and rotating the hollow shaft (24) and the ring band (23). Configure the central axis of the recovery device. Also connected to the ring band 23 is a cylinder 22 for operating the recovery fan, recovery fans 16 and 26 for recovering excess slurry from the panel, and the recovery fan 16 and 26 ) Is supported by chute (17) (27), and the hollow shaft (24) for recovering excess slurry from the slurry feeder (not shown) to operate the ring band (23) up and down the recovery fan (16) It is composed of a cylinder (21) for adjusting the distance to the shaft when mounting (26) and the link (25) for supporting the recovery fan (16, 26) to maintain a constant distance from the shaft.

Figure 2 is a plan view of the slurry recovery device according to the present invention, as can be seen through the drawings, in order to eliminate the hassle of having to pause the work or to remove the workbench for cleaning and replacement of the recovery fan 16, By rotating the two recovery fans 16, 26 around the fixed shaft 20, the recovery fan 16 and the new recovery fan 26, which are recovering excess slurry from the panel (not shown), are easily provided. It is possible to replace, it is also configured to enable the washing of the replaced recovery fan 16 is fixed.

In the present invention configured as described above, when the panel having excess slurry is moved to the recovery device, the cylinder 22 has a diameter and an annular transverse wall slightly larger than the panel, and the chute 17 is located at the lower end thereof. The fan 16 is lowered and the excess slurry is recovered to the slurry feeder through the chute 17 and the hose 18 by centrifugal force by rotating the panel at a high speed, and when the recovery operation is completed, the recovery fan 16 is completed. Is mounted again while maintaining a constant distance from the fixed shaft 20 by the cylinder (21). In addition, when the recovery fan 16 is replaced, a new recovery fan 26 installed on the hollow shaft 24 is rotated about the fixed shaft 20, thereby easily replacing the recovery fan 16 without removing the recovery fan 16. The operation is made, and the replacement recovery fan 16 is cleaned in a fixed state.

As described above, according to the present invention, in the slurry recovery apparatus for recovering excess slurry, unlike the conventional method, by installing two homogeneous recovery fans 16 and 20 on the rotatable hollow shaft 24, In addition, it is possible to easily replace and clean the work without removing the recovery fan, and to prevent the suspension of work and the deterioration of production according to the replacement fan replacement process, and to obtain the practicality to prevent safety accidents. have.

Claims (1)

In the slurry recovery apparatus for recovering excess slurry when manufacturing the fluorescent surface of the cathode ray tube, the hollow shaft 24 rotatably installed on the fixed shaft 20 forming the rotation center, and rotates together with the hollow shaft 24 In addition, the lower end of the ring band 23 and the rotary cylinder 28 for rotating the hollow shaft 24 and the ring band 23 and the hollow shaft 24 to operate up and down by the cylinder 21 And a cylinder (22) for inverting a recovery fan (16) (26) connected by a link (25) to a recovery position and a slurry application position.