KR100551032B1 - Glass baking apparatus for plasma display panel - Google Patents

Abstract

The present invention is to provide a substrate baking apparatus for a plasma display panel to uniformly distribute the flow rate of the air injected toward the substrate to maximize the gas discharge in the kiln, thereby effectively removing the organic matter in the kiln.

Plasma display panel substrate firing apparatus according to the present invention, the gas in the firing furnace generated in the firing process by injecting air from the upper side of the substrate conveyed in the direction of the firing process and thereby the gas discharged from the other side and A plurality of air injection / gas discharge plenum assemblies disposed in the kiln at predetermined intervals to discharge organic matter, wherein the air injection / gas discharge plenum assembly is disposed at right angles to the firing process progress direction and A plenum chamber for discharging gas in the kiln at negative pressure with an outlet on the opposite side, and arranged side by side on one side of the plenum chamber, connected to the air supply line provided inside the plenum chamber by a neck portion, and undergoing a sintering process. A branch pipe having a plurality of injection nozzles directed in a direction, the branch It is formed of a pair of first and second branch pipes.

Plenum chamber, kiln, branch pipe, neck part, residual gas

Description

Substrate firing apparatus for plasma display panel {GLASS BAKING APPARATUS FOR PLASMA DISPLAY PANEL}

1 is a partial side view schematically showing a substrate baking apparatus for a plasma display panel according to the present invention.

2 is a partial perspective view of an air jet / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention.

Figure 3 is a simulated air flow rate profile in the air injection / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention.

4 is an air flow rate distribution diagram of an air injection / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention.

5 is a residual gas amount distribution diagram simulated in the substrate firing apparatus for plasma display panel according to the present invention.

6 is a partial perspective view of an air injection / gas discharge plenum assembly applied to a substrate firing apparatus for a plasma display panel according to the prior art.

7 is a simulated air flow rate profile in an air injection / gas discharge plenum assembly applied to a substrate firing apparatus of the prior art.

8 is an air flow rate distribution diagram of an air injection / gas discharge plenum assembly applied to a substrate firing apparatus of the prior art.

9 is a residual gas amount distribution diagram simulated in the substrate firing apparatus for a plasma display panel according to the prior art.

The present invention relates to a substrate firing apparatus for a plasma display panel (hereinafter referred to as a PDP), and more particularly, to uniformly distribute the flow rate of air injected toward the substrate to maximize gas discharge in the kiln. The present invention relates to a substrate calcination apparatus for a plasma display panel that effectively removes organic substances in a calcination furnace.

In general, PDP is used to display an image using a gas discharge phenomenon, and is excellent in various display capacities such as display capacity, brightness, contrast, afterimage, and viewing angle, and thus, has been spotlighted as a device that can replace CRT.

On the other hand, there are many individual processes in the PDP manufacturing process. In other words, the PDP manufacturing process consists of several processes, such as forming electrodes on one substrate, printing a dielectric, forming partitions on the other substrate, and forming phosphors. These processes are performed in a continuous process by a transfer device.

These processes may go through a firing process due to the nature of each process. This firing process is carried out in a firing apparatus including a firing furnace. 6 is a partial perspective view of an air injection / gas discharge plenum assembly applied to a substrate firing apparatus for a plasma display panel according to the prior art.

Referring to the drawings, the air injection / gas discharge plenum assembly injects air to one side to two substrates 61 conveyed in a firing process (a) in a firing furnace (not shown) and to the other side. It is configured to discharge the gas to discharge the gas and organic matter generated in the firing process. This air injection / gas discharge plenum assembly is arranged in a plurality of firing furnaces at predetermined intervals.

The air injection / gas discharge plenum assembly has a plenum chamber 63 arranged in the width direction (z-axis direction) of a kiln in which two substrates 61 are disposed, and on one side of the plenum chamber 63. It consists of three branch pipes 65 arranged side by side. Discharge ports 67 disposed at equal intervals are formed below the plenum chamber 63, and three branch pipes 65 are formed with injection nozzles 69 disposed at equal intervals. Each branch pipe 65 is connected to the neck portion 71 to an air supply line 70 disposed inside the plenum chamber 63.

The air injection / gas discharge plenum assembly configured as described above is configured to supply air supplied to the air supply line 70 and the neck portion 71 during the firing process to the substrate 61 through the injection nozzle 69 of the branch pipe 65. By spraying upward, the gas and organic matter generated during the firing process are moved from the surface of the substrate 61 and the gas and organic matter thus moved are discharged through the discharge port 67 formed in the plenum chamber 63.

FIG. 7 is an air flow rate profile simulated in an air jet / gas discharge plenum assembly applied to a substrate firing apparatus of the prior art, and FIG. 8 is an air jet / gas discharge plenum assembly applied to a substrate small growth value of the prior art. Is an air flow velocity distribution of.

The distribution of air flow rate injected from one side air injection / gas discharge plenum assembly (ⅰ) affects the distribution of air flow rate injected from the next air injection / gas discharge plenum assembly (ii) adjacent in the firing process direction (a). Although uniform distribution is required as shown in the drawing, as shown in the drawing, the air flow rate distribution supplied from the one-side air injection / gas discharge plenum assembly is formed non-uniformly. In other words, the air flow rate is gradually increased between both ends of the branch pipe 65 and the neighboring branch pipes 65, and the air flow speed is gradually decreased at the center side of the branch pipes 65.

As such, the flow rate distribution of the air injected from the one-side air injection / gas discharge plenum assembly is unevenly formed, and this non-uniform flow rate distribution adversely affects the next air injection / gas discharge plenum assembly (ii). In addition, there is a problem in that the gas and organic matter are not uniformly discharged with respect to the entire area of the fired substrate 61. At this time, the amount of exhaust gas on the substrate 61 can be known by measuring the weight of the substrate 61 before and after firing and measuring the amount of organic material burned and lost during the firing period.

9 is a residual gas amount distribution diagram simulated in the substrate firing apparatus for a plasma display panel according to the prior art. As a result of the simulation, this residual gas amount distribution chart shows the distribution of the residual gas g appearing on the planar cross section 5 mm above the substrate 61. The distribution diagram of the residual gas amount shows that the flow rate distribution of the air injected from the air injection / gas discharge plenum assembly is unevenly formed, so that the residual gas amount g is large in the center portion.

When comparing the discharge gas amount as the experimental result and the residual gas amount g as the simulation result, the exhaust gas amount is not symmetrical like the residual gas amount g, but the gas is not smoothly discharged at the central part where the substrate 61 is transferred. In other parts, the distribution is even. Thus, experiments and simulations have similar results with a large amount of residual gas (g) at the center of the substrate 61.

The present invention was devised to solve the problems as described above, and its object is to maximize the gas discharge in the kiln by uniformizing the flow rate distribution of air injected toward the substrate, thereby effectively removing the organic matter in the kiln. It is to provide a substrate baking apparatus for a display panel.

In order to achieve the above object, the plasma display panel substrate firing apparatus according to the present invention,

It is disposed at predetermined intervals in the kiln to discharge the gas and organic matter in the kiln generated in the firing process by injecting air from one side of the substrate and thereby discharging the gas from the other side of the substrate transported in the direction of the firing process. A plurality of air injection / gas discharge plenum assemblies,

The air injection / gas discharge plenum assembly,

A plenum chamber disposed at right angles to the firing process direction and having a discharge port on an opposite side of the substrate to discharge gas in the firing furnace at a negative pressure;

It is arranged side by side on the plenum chamber, connected to the air supply line provided inside the plenum chamber by a neck portion and includes a branch pipe having a plurality of injection nozzles in the direction of the firing process,

The branch pipe is formed of a pair of first and second branch pipes.

The injection nozzles are formed in the first and second branch pipes except the vertical portion of the neck portion.

Preferably, the neck portion is connected to a position biased outward from the center of the first and second branch pipes.

In addition, the substrate baking apparatus for a plasma display panel which concerns on this invention,

It is disposed at predetermined intervals in the kiln to discharge the gas and organic matter in the kiln generated in the firing process by injecting air from one side of the substrate and thereby discharging the gas from the other side of the substrate transported in the direction of the firing process. A plurality of air injection / gas discharge plenum assemblies,

The air injection / gas discharge plenum assembly,

A plenum chamber disposed at right angles to the firing process direction and having a discharge port on an opposite side of the substrate to discharge gas in the firing furnace at a negative pressure;

It is arranged side by side on the plenum chamber, connected to the air supply line provided inside the plenum chamber by a neck portion and includes a branch pipe having a plurality of injection nozzles in the direction of the firing process,

The branch pipes are provided in the same number as the substrates arranged in parallel, and are formed of a pair of first and second branch pipes having symmetrical distributions of the injection nozzles based on the neck.

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

1 is a partial side view schematically showing a substrate firing apparatus for a plasma display panel according to the present invention, and FIG. 2 is a partial perspective view of an air injection / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention. .

Referring to the drawings, the substrate baking apparatus for a plasma display panel includes a firing furnace 1 in which a firing process proceeds, a conveying apparatus (not shown) for transferring the substrate 3 in the firing furnace 1, and a substrate to be conveyed ( An air injection / gas discharge plenum assembly 5 for injecting air to the surface of 3) and discharging the gas in the kiln 1 is provided. The substrate 3 for PDP panels proceeds in the firing process direction A in the firing furnace 1 by a transfer device. Since this firing process is continuously performed, the PDP manufacturing process including this firing process and another process is made possible by a continuous process.

The air injection / gas discharge plenum assembly 5 forms the air flow B on the substrate 3 by injecting air from one side of the substrate 3 where the firing process is performed, and discharging gas from the other side. The gas and organic matter generated during the process are moved to one side on the substrate 3 to be discharged together with the exhaust gas. The air injection / gas discharge plenum assembly 5 is arranged in plurality in the firing process direction A while maintaining a predetermined interval in the firing furnace 1.

The air injection / gas discharge plenum assembly 5 includes a plenum chamber 7 arranged at right angles to the firing furnace 1 with respect to the advancing direction A of the firing process, and a branch pipe 9 arranged parallel thereto. Include.

The plenum chamber 7 discharges the gas in the kiln 1 to discharge the gas generated in the firing process, thereby discharging the organic material together with the discharge gas, and the branch pipe 9 is a substrate 3 in the kiln 1. The air flow B as described above is formed on the substrate 3 in the firing furnace 1 because the gas and organic matter remaining on the substrate 3 are moved to one side by injecting air toward the.

A plurality of outlets 11 are provided below the plenum chamber 9, that is, on the opposite side of the upper surface of the substrate 3 so that such air stream B is formed. The outlet 11 is preferably formed at predetermined equal intervals so that the negative pressure acts uniformly on the plenum chamber 9 with respect to the installation direction Z of the plenum chamber 9. Negative pressure acts on the outlet 11 through the plenum chamber 9.

The branch pipe 9 injects air so that the gas in the kiln 1 is discharged more smoothly by the negative pressure acting on the plenum chamber 7. The air flow injected from the branch pipe 9 moves the gas and organic matter on the substrate 3 to the outlet 11 side of the plenum chamber 7 located forward with respect to the firing process progress direction A. FIG. To this end, the branch pipe 9 is disposed side by side on the plenum chamber 7 and is connected to the air supply line 13 and the neck portion 15.

The air supply line 13 is provided in the vertical direction inside the plenum chamber 7 and the neck part 15 is provided at the lower end thereof, and the neck part 15 is connected to the branch pipe 9. The branch pipe 9 is provided with a plurality of injection nozzles 17 in the branch pipe 9 so as to inject air toward the traveling direction A of the firing step.

3 is an air flow rate profile simulated in the air jet / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention, and FIG. 4 is a view of the air jet / gas discharge plenum assembly applied to the substrate firing apparatus of the present invention. 5 is an air flow velocity distribution diagram, and FIG. 5 is a residual gas amount distribution diagram simulated in the substrate baking apparatus for plasma display panel according to the present invention.

In particular, since the branch pipes 9 are preferably provided in the same number as the substrates 3 which are arranged and transferred in parallel as shown in FIG. 3, the branch pipes 9 are formed of a pair of first and second branch pipes 9a and 9b. . These first and second branch pipes 9a and 9b form an air flow velocity profile formed on the substrate 3 as shown in FIG. 3, so that the air flow is close to an ideal situation as shown in FIG. 4. A velocity distribution chart is obtained to reduce the distribution of residual gas amount G in the central portion as shown in FIG.

The first and second branch pipes 9a and 9b are provided in pairs on one side of the plenum chamber 7 to form an air flow velocity profile as shown in FIG. 3. That is, the air flow velocity is gradually increased between each end of the first and second branch pipes 9a and 9b and the neighboring first and second branch pipes 9a and 9b, and the first and second branch pipes 9a, 9b) At each center side, the air flow rate is lowered gradually. The first and second branch pipes 9a and 9b form an overall air flow rate distribution diagram as shown in FIG. 4.

This air flow rate distribution diagram has a pair of first and second branch pipes 9a and 9b, thereby reducing the section where the flow rate is gradually lowered to two points compared to having three branch pipes in the prior art. . Simulation Results The structure of the first and second branch pipes 9a and 9b of the present invention under the same conditions has an effect of reducing the residual gas by about 3% compared with the prior art.

Further, the neck portions 15 for supplying air to the first and second branch pipes 9a and 9b, respectively, are connected to the position biased outward from the center of the first and second branch pipes 9a and 9b. have. In the first and second branch pipes 9a and 9b, the air flow rate is lowest at the portion where the neck portion 15 is connected. Therefore, according to the connection position of the neck portion 15 to the first and second branch pipes 9a and 9b, the portion where the air flow rate is lowest is outward from the center portion of the air injection / gas discharge plenum assembly 5. It is moved, and the optimum setting of this part maximizes the discharge of gas and organic matter in the kiln 1, thereby optimizing the residual gas distribution.

The injection nozzles 17 formed in the first and second branch pipes 9a and 9b are formed at predetermined equal intervals in the first and second branch pipes 9a and 9b, as shown in FIG. It is preferable that the neck portion 15 is not formed below the vertical portion 17a. In addition, the distribution of the injection nozzles 17 formed in the first and second branch pipes 9a and 9b is symmetrical with respect to the neck part 15. In this way, since the distribution of the injection nozzles 17 is substantially symmetrical, the injection nozzles 17a are not formed below the neck portion 15 in the vertical direction, and thus the air flows injected from the first and second branch pipes 9a and 9b. The sagging of the neck 15 is prevented from sagging particularly toward the substrate 3.

As shown in FIG. 4, the air flow rate distribution chart formed by the first and second branch pipes 9a and 9b is formed in a state where the air flow rate of the central portion is high and the outer portion is somewhat lower. .

Further, the first and second branch pipes 9a and 9b are formed long in the width (Z-axis) direction of the same firing furnace 1 as compared to the three branch pipes in the related art, and thus are provided to the injection nozzle 17. Since the velocity of the injected air is lowered, the amount of air actually injected due to the flow resistance decreases, so it is necessary to compensate for this. To this end, the air supplied to the first and second branch pipes 9a and 9b is preferably set to an amount larger than the amount of air supplied to the branch pipe of the prior art.

The flow velocity distribution of the air injected from this one-side air injection / gas discharge plenum assembly (I) is somewhat higher than that of the center part, but the center part and the outside part are generally similar, and the center part is formed almost uniformly. This uniform flow rate distribution grows uniformly to the next air jet / gas outlet plenum assembly (II) and does not adversely affect the next air jet / gas outlet plenum assembly (II), so that the substrate 3 in the kiln 1 The gas and organics are discharged uniformly over the entire area.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

 As described above, according to the substrate baking apparatus for plasma display panel according to the present invention, a pair of first and second branch pipes is provided on one side of the plenum chamber, and air is supplied to the first and second branch pipes. The neck portion is biased outwardly from the center of the first and second branch pipes, respectively, to uniformly distribute the air flow rate to be injected to the air spray / gas discharge plenum assembly adjacent to the air spray / gas discharge plenum assembly on one side. Maximizing the discharge of gas in the kiln, thereby effectively removing the organic matter in the kiln.

Claims (5)

It is disposed at predetermined intervals in the kiln to discharge the gas and organic matter in the kiln generated in the firing process by injecting air from one side of the substrate and thereby discharging the gas from the other side of the substrate transported in the direction of the firing process. A plurality of air injection / gas discharge plenum assemblies, The air injection / gas discharge plenum assembly, A plenum chamber disposed at right angles to the firing process direction and having a discharge port on an opposite side of the substrate to discharge gas in the firing furnace at a negative pressure; It is arranged side by side on the plenum chamber, connected to the air supply line provided inside the plenum chamber by a neck portion and includes a branch pipe having a plurality of injection nozzles in the direction of the firing process, And said branch pipe is formed of a pair of first and second branch pipes. The method of claim 1, The injection nozzle is a plasma display panel substrate firing apparatus is formed in the first, second branch pipe except the vertical downward. The method of claim 1, And the neck portion is connected to a position biased outward from a center of the first and second branch pipes. The method of claim 1, The injection nozzle is a plasma display panel substrate firing apparatus is formed in the number of the inner side than the outer side in the first, the second branch pipe based on the neck portion. It is disposed at predetermined intervals in the kiln to discharge the gas and organic matter in the kiln generated in the firing process by injecting air from one side of the substrate and thereby discharging the gas from the other side of the substrate transported in the direction of the firing process. A plurality of air injection / gas discharge plenum assemblies, The air injection / gas discharge plenum assembly, A plenum chamber disposed at right angles to the firing process direction and having a discharge port on an opposite side of the substrate to discharge gas in the firing furnace at a negative pressure; It is arranged side by side on the plenum chamber, connected to the air supply line provided inside the plenum chamber by a neck portion and includes a branch pipe having a plurality of injection nozzles in the direction of the firing process, The branch pipes are provided in the same number as the substrates arranged in parallel, and the firing of the substrate for plasma display panel is formed by a pair of first and second branch pipes in which the distribution of the injection nozzles based on the neck is symmetric with each other. Device.

Images