JPH05205622A - Spray application device for component of cathode-ray tube - Google Patents

Abstract

PURPOSE:To prevent spray liquid from attaching and splashing by furnishing an enclosure in the direction perpendicular to the transportation of work, and installing a transport apparatus over the enclosure and a spray liquid collection trough under the same. CONSTITUTION:A mask frame to which a shadow mask 1 is secured, is hung at a hanger 3 so that the surface of application is vertical, and transported by a trolley conveyor 4. A robot 11 to control a spray nozzle 10 and an enclosure 12 to surround the shadow mask 1 and nozzle 10 are installed in the spray liquid applying position. The enclosure 12 is shaped in an inverted U-form with the under-part and the surface perpendicular to the mask transportation opened and moves fore and aft along a rail 13. The rail 13 is installed over the enclosure 12 and fixed to the over-surface of a spray liquid collection trough 14 provided under the enclosure 12. The trolley conveyor 4 is located over the enclosure 12, and the nozzle 10 is positioned in front of shadow mask 1 while the trough 14 under the mask 1, and the spray liquid is prevented from attaching to or splashing around the transport apparatus including conveyor 4, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray coating apparatus for cathode ray tube parts.

[0002]

2. Description of the Related Art Conventionally, as a spray coating apparatus for cathode ray tube parts, for example, JP-A-62-108423 (hereinafter referred to as known example 1), JP-A-2-79321 (hereinafter referred to as known example 2) and JP-A-60-20044
The one disclosed in Japanese Patent Laid-Open No. 0 (hereinafter, referred to as Known Example 3) has been proposed.

In each of the above-mentioned conventional spray coating apparatuses, the spray nozzle is located above the work transfer device, and the work is transferred as follows. Although the known examples 1 and 2 do not disclose any work transfer, generally, the work is transferred by a free flow conveyor, and a shutter is provided at the entrance and exit of the spray coating device. Further, as shown in the known example 3, loading and unloading are performed for each work into and from the spray coating apparatus. Further, in collecting the spray liquid, the spray liquid sprayed from above is dropped into the water in the spray liquid recovery tank. Further, although nothing is disclosed about prevention of nozzle clogging, a method is generally used in which the clogging state is managed by spray pressure or the like, and when the spray nozzle is clogged, the spray nozzle is replaced.

[0004]

In the above-mentioned prior art, in regard to the method of transporting the work, since the spray liquid is sprayed from above the transport device, the spray liquid adheres to the transport device and the spray liquid is scattered around. There was a problem. Further, regarding the recovery of the spray liquid, since the spray liquid is simply dropped into the spray liquid recovery tank, the water in the spray liquid recovery tank is frequently replaced and cleaning is difficult. Regarding nozzle clogging, there was a problem that the spray nozzle was frequently replaced.

A first object of the present invention is to prevent the spray liquid from adhering to a carrier device and to prevent the spray liquid from scattering around.
It is an object of the present invention to provide a spray coating apparatus for cathode ray tube parts capable of continuous automatic conveyance.

A second object of the present invention is to provide a spray coating apparatus for cathode ray tube parts which makes effective use of water and is easy to clean the inside of the spray liquid recovery tank.

A third object of the present invention is to provide a spray coating apparatus for cathode ray tube parts which can more effectively prevent nozzle clogging.

[0008]

A first means for achieving the above first object is a spray nozzle for spraying a work of a cathode ray tube part, and a work which is movable in a direction perpendicular to the direction of conveyance of the work. It is characterized in that it is provided with an enclosure, a conveying device provided above the enclosure for suspending and conveying the work, and a spray liquid recovery tank provided below the enclosure.

A second means for achieving the above first and second objects is the spray liquid recovery tank of the above first means.
Water is supplied from the spray nozzle side to create a water flow so that it overflows from the back side, and the bottom of the spray liquid recovery tank is tilted by raising the upstream side of the water flow, and the water curtain and shower on the back side of the work. Etc. are formed, and the water on the upstream side of the spray liquid recovery tank is supplied to the water curtain, shower, and the like.

As a third means for achieving the above first and third objects, in addition to the above first means, a nozzle dipping tank for attaching a spray nozzle to the vicinity of the spray nozzle when the spray is stopped is added. It is characterized by

[0011]

According to the first means, the conveying device is provided on the upper side with respect to the spraying direction to suspend the work, the enclosure is moved and retracted to the spray nozzle side when the work is moved, and the enclosure is advanced during the spraying. By performing the surrounding operation, it is possible to continuously and automatically transfer the work. In addition, a transport device for transporting the work is installed above the enclosure, a spray nozzle is installed in the front of the work, and a spray liquid recovery tank is placed in the lower part of the enclosure. This prevents the spray liquid from adhering to the device and prevents the spray liquid from splashing around.

According to the second means, most of the spray liquid sprayed from the spray nozzle and passing through the work drops into the spray liquid recovery tank provided at the lower part by the water curtain and shower, and the spray liquid recovery tank contains Although the water becomes heavily soiled, water is supplied and sprayed from the spray nozzle side into the spray liquid recovery tank, and the overflowed water is drained from the back side, so a water flow can be made from the front side to the back side. Since the bottom surface of the recovery tank is highly inclined on the upstream side, dirt is concentrated on the downstream side and cleaning is easy. Also, since the water on the upstream side is clean, it can be used for water curtains and showers, and by circulating it, effective use of water was achieved.

According to the third means, when the spray is stopped, the nozzle clogging can be prevented by attaching the tip of the spray nozzle to the nozzle immersion tank. In addition, air is blown for the purpose of preventing nozzle clogging and removing water or chemicals adhering to the spray nozzle. Further, by making the nozzle immersion tank an overflow type, reattachment to the spray nozzle is prevented, and the effect of preventing nozzle clogging is further increased. That is, when a highly viscous substance is used for the spray liquid, nozzle clogging occurs. In particular, when water glass or the like is used for the slurry of the spray liquid for strengthening the spray adhesive force, the spray nozzle is frequently replaced. Most of the causes are that the spray liquid slurry adhering to the tip of the spray nozzle dries and solidifies, and the slurry particles in the spray nozzle adhere and solidify when the spray is stopped. Such nozzle clogging is prevented as described above.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, a mask frame 2 to which a shadow mask 1 which is an object to be sprayed is fixed.
Is hung on the hanger 3 so that the application surface is vertical and is conveyed by the trolley conveyor 4. A hanger positioning means 5 for positioning the hanger 3 is provided at the spray liquid application position, and a mask chuck 6 is provided at a right angle to the spray direction in order to prevent the shake mask 1 from shaking due to spray pressure. A mask holder 7 is arranged on the back side of the spray.

At the spray liquid application position, a robot 11 for controlling the spray nozzle 10 and an enclosure 12 for surrounding the shadow mask 1 and the spray nozzle 10 are provided. As shown in FIGS. 1, 3 and 4, the enclosure 12 has an inverted U-shape with its lower surface and the planes (front and rear surfaces) perpendicular to the mask transport direction open (front and rear surfaces), and is disposed in the mask transport direction at right angles. It is adapted to move back and forth along the guide rails 13 formed. The guide rail 13 is fixed to the upper surface of a spray liquid recovery tank 14 arranged below the enclosure 12. Further, a groove 12 a is formed on the upper surface of the enclosure 12 so that the shadow mask 1 can be located inside the enclosure 12. Further, a work cover 15 is arranged in the enclosure 12 so that the spray liquid does not adhere to the non-application portion.

As shown in FIGS. 1 and 5, the spray liquid recovery tank 14 is configured so that water is supplied and jetted from the spray nozzle 10 side and the overflowed water is drained from the back surface side. A water stream 20 is generated inside. In addition, the bottom surface 14a of the spray liquid recovery tank 14 is
The water supply side (upstream side) is high and the drain side is low, so that the dirt is concentrated on the drain side. A water curtain nozzle 23 and a shower nozzle 24 for forming a water curtain 21 and a shower 22 are provided above the spray liquid recovery tank 14 and behind the enclosure 12, and these water curtain nozzles 23 and Water on the upstream side in the spray liquid recovery tank 14 is supplied to the shower nozzle 24 by a pump 25.
Further, on the back surface of the shower 22, a suction unit 27 that suctions from the back surface or from the lower side of the back surface is provided. On the robot 11 side, as shown in FIG. 6, a nozzle immersion tank 29 fixed to the spray liquid recovery tank 14 with a bracket 28 is arranged, and the nozzle immersion tank 29 is an ultrasonic transducer 30.
In addition, it is an overflow type that contains chemicals or water.

Next, the operation will be described. When the shadow mask 1 is hung on the hanger 3 and intermittently conveyed by the trolley conveyor 4, and stopped at the spray liquid application position, the hanger positioning means 5 first positions the hanger 3. Next, the enclosure 12 is advanced from the state shown in FIG. 3 by a driving means (not shown) as shown in FIG. Then, the mask frame 2 is chucked and positioned by the mask chuck 6, and the mask frame 2 is pressed against the work cover 15 by the mask retainer 7 on the back side to prevent the shake mask 1 from shaking. In this state, the spray nozzle 10 is controlled by the robot 11 to spray the shadow mask 1 from the side. When spraying is completed (spray is stopped), the enclosure 12 is the spray nozzle 1
After moving to the 0 side and retracting, the trolley conveyor 4 is driven and the shed mask 1 is sent to the next step.

In this way, the trolley conveyor 4 for carrying the hanger 3 on which the shed mask 1 is suspended is enclosed 12
The spray nozzle 10 on the front side and the spray liquid collecting tank 14 on the lower side with respect to the sheer mask 1.
Since the upper part and the left and right side surfaces are surrounded by the enclosure 12, the spray liquid is prevented from adhering to the carrier equipment such as the trolley conveyor 4 and the spray liquid is prevented from being scattered around. In this case, if suction 26 is performed from the back surface or the lower back surface of the shadow mask 1, the spray liquid is prevented from being scattered to the front surface side of the spray nozzle 10 without the enclosure 12, and the spray liquid is also attached to the surrounding enclosure 12. Will be reduced.

Further, with respect to the spray direction, a carrying device is provided on the upper part to suspend the shed mask 1, and when the shed mask 1 is moved, the enclosure 12 is moved and retracted toward the spray nozzle 10 side. By carrying out the operation of enclosing, the continuous automatic transfer of the sheer dough mask 1 has become possible.

Further, most of the spray liquid sprayed from the spray nozzle 10 and passing through the shed mask 1 is dropped by the water curtain 21 and the shower 22 into the spray liquid recovery tank 14 provided in the lower portion. This allows
Although the water in the spray liquid recovery tank 14 becomes very dirty, water is supplied and injected from the spray nozzle 10 side into the spray liquid recovery tank 14, and the overflowed water is drained from the back surface side, so from the front surface side to the back surface side. Since the water flow 20 is formed on the side, and the bottom surface 14a of the spray liquid recovery tank 14 is highly inclined on the upstream side, dirt is concentrated on the downstream side and cleaning is easy. In particular, if the slurry of the spray liquid is a substance that does not settle, dirty water easily flows to the drain side and overflows and is drained, which is more effective. Further, since the water on the upstream side is clean, it can be diverted to the water curtain 21 and the shower 22, and the water can be effectively used by circulating it.

If a highly viscous substance is used for the spray liquid, nozzle clogging will occur. In particular, when water glass or the like is used for the slurry of the spray liquid for the purpose of strengthening the spray adhesive force, the spray nozzle 10 is frequently replaced. Most of the causes are that the spray liquid slurry attached to the tip of the spray nozzle 10 is dried and solidified, and the slurry particles in the spray nozzle 10 are adhered and solidified when the spray is stopped. Therefore, when the spray is stopped, the spray nozzle 1 is driven by the robot 11.
Nozzle clogging can be prevented by attaching the tip of 0 to the nozzle immersion tank 29. Further, idle spraying is performed for the purpose of preventing nozzle clogging and removing water or chemicals adhering to the spray nozzle 10. Further, by making the nozzle dipping tank 29 an overflow type, reattachment to the spray nozzle 10 is prevented, and the effect of preventing nozzle clogging is further increased.

[0022]

According to the first aspect of the present invention, it is possible to prevent the spray liquid from adhering to the transfer device and to prevent the spray liquid from being scattered to the surroundings, and to perform continuous automatic transfer. According to the second aspect, it is possible to prevent the nozzle clogging more effectively. According to claim 3, water can be effectively used and the inside of the spray liquid recovery tank can be easily cleaned.

[Brief description of drawings]

FIG. 1 is a side view of a spray coating device showing an embodiment of the present invention.

FIG. 2 is an enlarged side view of a carrier device.

FIG. 3 is a side view showing the relationship between the work and the enclosure.

FIG. 4 is a front view of FIG.

FIG. 5 is an explanatory diagram of spray liquid recovery.

FIG. 6 is an explanatory diagram of nozzle clogging prevention.

[Explanation of symbols]

 1 Sheath Mask 3 Hanger 4 Trolley Conveyor 10 Spray Nozzle 12 Enclosure 13 Guide Rail 14 Spray Liquid Collection Tank 14a Bottom 20 Water Stream 21 Water Curtain 22 Shower 27 Suction Part 29 Nozzle Immersion Tank

Claims (3)

[Claims] 1. A spray nozzle for spraying a work of a cathode ray tube component, an enclosure that is movable in a direction perpendicular to the transport direction of the work and surrounds the work, and a transportation device that is provided above the enclosure to suspend and transport the work. And a spray liquid recovery tank provided below the enclosure, a spray coating apparatus for a cathode ray tube component. 2. A spray nozzle for spraying a work of a cathode ray tube component, an enclosure that is movable in a direction perpendicular to the direction in which the work is conveyed, an enclosure that surrounds the work, and a conveying device that is provided above the enclosure and that suspends and conveys the work. A spray coating apparatus for a cathode ray tube part, comprising: a spray liquid collecting tank provided below the enclosure; and a nozzle dipping tank in which a spray nozzle is attached near the spray nozzle when the spray is stopped. 3. The spray liquid collecting tank according to claim 1, wherein water is supplied from the spray nozzle side to create a water flow so as to overflow from the back side, and the bottom surface of the spray liquid collecting tank is filled with water. The upstream side is made higher and inclined, and the water curtain, shower, etc. are further formed on the back side of the work, and the water on the upstream side of the spray liquid recovery tank is supplied to this water curtain, shower, etc. A characteristic spray coating device for cathode ray tube parts.