KR200318436Y1 - Roller Hearth kiln for forming paste film in PDP - Google Patents

Abstract

The present invention relates to a continuous firing furnace for firing a PDP paste film, and in particular, the upper chamber 100 and the lower chamber 200 arranged up and down are respectively a ceiling wall 101, a road wall 102 and 202, a left and right wall ( It consists of independent chambers surrounded by 103 and 203, and each of the chambers 100 and 200 has electrothermal heaters 104 and 204 installed on the ceiling walls 101, respectively. In addition, the present invention is disposed in the vertical direction in the vertical direction outside the outlet of the upper chamber 100 and the lower chamber 200 and is plastically discharged from the upper chamber 100 and the lower chamber 200 while lifting up and down by a lifting mechanism. There is provided a workpiece lifting device 400 for carrying the workpiece to be transferred to the inlet side of the transfer chamber 300. And each lower roller (110, 210) is made of a tube shape of a ceramic material, both ends are supported by the roller support shaft (112,212) and the roller rotation shaft (114,214), the spring of the 115 is fitted on the roller rotation shaft (114,214) By being tightly fixed by the force is rotated in conjunction with the roller rotation shaft (114,214).

Description

Continuous firing furnace for firing PDP film {Roller Hearth kiln for forming paste film in PDP}

The present invention relates to a firing furnace for firing a paste film of a PDP (Plasma Display Panel, hereinafter abbreviated as "PDP"). In particular, a continuous firing furnace for firing a paste film of each PDP panel while continuously passing a plurality of PDP glass substrates. It is about.

During the PDP manufacturing process, the paste film is fired by firing a plurality of barrier ribs in opposing glass substrates, plasticizing an encapsulant applied on one edge of the glass substrate, or printing pastes on the glass substrate, dielectric layers, MgO protective layers, It is a process of heat-treating fluorescent film to heat and cool to each process temperature so that it can function as a material. In the firing process, a continuous firing furnace for firing while continuously passing a plurality of PDPs is used. Such continuous firing furnace is known from Korean Patent Laid-Open Publication No. 1999-13330.

The conventional continuous firing furnace includes a furnace wall installed to extend in a horizontal direction, and the inner space of the furnace wall includes a series of processing chambers including a heating part, a heating part, a baking part, a slow cooling part, and a quenching part depending on the processing temperature. Each treatment chamber has a muffle structure, and the inner space of the furnace wall is formed by two partitions of the upper treatment chamber and the lower treatment chamber by a metal partition plate extending horizontally along the longitudinal direction of the furnace. It is partitioned into a processing chamber. In the lower part of the upper and lower processing chambers, a series of lower rollers are continuously arranged in a horizontal direction to transfer the glass substrate from the inside of the processing chamber. An upper electric heater is installed on the ceiling wall of the upper processing chamber, and a lower electric heater is installed on the bottom wall. In the lower part of the partition plate, a middle heat transfer heater is installed laterally to heat the glass substrates carried on the lower rollers arranged in two rows.

However, the conventional continuous firing furnace having the structure as described above has the following problems.

First, in the conventional continuous firing furnace, since the upper and lower processing chambers are partitioned by metal partition plates, the organic binder, dust roller dust, and other dust generated in the furnace wall during the process in the upper processing chamber are accumulated on the metal partition plates. It enters the lower processing chamber through the gap of the plate and adversely affects the material to be processed.

Second, the intermediate heat heater is installed under the metal partition plate to supply heat to the upper and lower processing chambers simultaneously. The heat of the intermediate heat heater is supplied to the upper processing chamber via the metal partition plate disposed above the intermediate heat heater. In addition, since the heat is directly transferred to the lower processing chamber, there is a difference in thermal energy transmitted to the upper and lower processing chambers, thereby causing a temperature disturbance. Therefore, there is a disadvantage in that the material to be processed in the upper and lower processing chambers cannot be uniformly fired. In particular, the processing temperature of the material to be treated is not uniform over the entire portion of the material, which causes a defect.

Third, the lower roller is continuously deformed while being heated by high temperature inside the processing chamber and deformed by thermal expansion, and deformed by friction with the material to be repaired or replaced. As the roller is simply supported on the side wall of the processing chamber as a structure that is difficult to detach, there is a problem that the replacement or repair of the lower roller is difficult.

The present invention is designed to solve the problems of the conventional continuous firing furnace, to improve the productivity by configuring the processing chamber in the upper and lower double row at the same time to maintain the processing temperature uniformly in each processing chamber to prevent the occurrence of defects due to the temperature deviation In order to prevent the occurrence of defects caused by dust by blocking dust inflow, it is also an object of the present invention to provide a continuous firing furnace for PDP that is easy to repair or replace the rollers.

The present invention for achieving the above object, the upper chamber and the lower chamber arranged up and down is composed of a separate chamber surrounded by a ceiling wall, a hearth wall, a left and right wall, respectively, each of the heat transfer heater to the ceiling wall for each chamber Will be installed configuration.

In addition, the present invention is arranged in the vertical direction outside the outlet of the upper chamber and the lower chamber in the vertical chamber is carried up and down by the lifting mechanism while carrying the processed material discharged from the upper chamber and the lower chamber to discharge the inlet of the transfer chamber A material lifting device for feeding to the side is provided. And each lower roller is formed in a tubular shape, one end of the lower roller is supported to rotate through a bearing on the roller support shaft fixed to the frame, the other end is rotatable through the bearing on the frame It is interlocked with the roller rotating shaft by being fitted through the spring at the tip of the supported roller rotating shaft.

The continuous firing furnace of the present invention configured as described above is provided with a chamber for firing the PDP glass substrate in two rows of upper and lower rows, and a lifting device is disposed at the exit of each chamber to quickly convey the glass substrate that has undergone the firing process. Productivity can be doubled, and in particular, the upper chamber and the lower chamber are composed of separate chambers separated from each other, so dust generated in the upper chamber can be prevented from adversely affecting the firing process in the lower chamber, thereby preventing defects caused by dust. You can prevent it.

1 is a longitudinal cross-sectional view showing a schematic structure of a continuous firing furnace according to the present invention,

Figure 2 is a cross-sectional view showing the internal structure showing the continuous firing furnace according to the present invention in the transverse direction,

Figure 3 is a partially enlarged cross-sectional view showing the installation structure of the lower roller,

Figure 4 is a partial cross-sectional view showing a part of the internal structure of the slow cooling stand,

5 is a front view showing the structure of the lifting apparatus of the continuous firing furnace according to the present invention,

6 is a side view of FIG. 5.

※ Explanation of code for main part of drawing

100: upper chamber 200: lower chamber

101,201: ceiling wall 102,202: road wall

103,203: left and right walls 104,204: electric heater

105,205: Ceiling plate 106,206: Left and right side plates

107,207: Subplate 110,210: Haas roller

111,211: bearing 112,212: roller support shaft

113,213: Bearing 114,214: Roller shaft

115: spring 116,216: sprocket

117,217 air circulation pipe 118,218 heat exchanger

300: conveying room 301: conveyor

400: lifting device 401: guide rail

402: lifting plate 403: conveying roller

404: lifting chamber 405: drive motor

406: electric chain

N: inlet chamber A, B: heating part

C: crack part D: slow cooling part

E: Quench F: Frame

H: Treatment chamber W: Material to be processed

Hereinafter, an embodiment of a continuous firing furnace for PDP according to the present invention will be described in detail according to the accompanying drawings.

1 is a cross-sectional view schematically showing the structure of a continuous firing furnace according to the present invention, Figure 2 is a cross-sectional view showing the internal structure by cutting the continuous firing furnace in the transverse direction.

As shown in Figure 1, the continuous firing furnace according to the present invention, the upper chamber 100 and the lower chamber 200 composed of independent chambers are stacked in the vertical direction, the upper and lower chambers (100, 200) A series of process chambers H are divided into inlet chambers N, heating sections A and B, crack sections C, slow cooling sections D, and quench sections E according to temperature, respectively.

As shown in FIG. 2, the upper chamber 100 and the lower chamber 200 are composed of independent chambers surrounded by ceiling walls 101 and 201, hearth walls 102 and 202, and left and right walls 103 and 203, respectively. The lower part of the lower chamber 200 is provided with a conveying chamber 300 for conveying the workpiece (W), which is fired independently in the upper and lower chambers (100, 200) on the conveyor (301) and transports it in the horizontal direction. have.

Each processing chamber of the upper chamber 100 and the lower chamber 200 has a muffle structure. Specifically, as shown in FIG. 2, each of the processing chambers H is provided with heat-transfer heaters 104 and 204 on the inner surfaces of the ceiling walls 101 and 201 to heat the workpiece W passing from below. On the inner surfaces of the ceiling walls 101 and 201, the hearth walls 102 and 202, and the left and right walls 103 and 203, in which the heat heaters 104 and 204 are installed, the ceiling plates 105 of the heat-resistant steel sheet, the heart plates 107 and 207, and the left and right plates ( 106 and 206 are attached to each other.

The muffle ceiling plates 105 and 205, the hearth plates 107 and 207 and the left and right side plates 106 and 206 are exposed to the outside of the wall so as to be easily detached from each wall of the processing chamber H. It is preferable to attach by fastening means, such as these.

Meanwhile, as shown in FIGS. 1 and 2, a plurality of lower rollers 110 and 210 disposed in the horizontal and horizontal directions are respectively installed in the processing chambers H in the longitudinal direction of the chambers 100 and 200. do. Each Haas roller (110, 210) is composed of a tubular ceramic material. As shown in FIGS. 2 and 3, the lower rollers 110 and 210 are rotatably supported by being fitted to the ends of the roller support shafts 112 and 212 rotatably installed in the frame F as bearings 111 and 211. The other end is inserted into and supported by the spring 115 at the front end of the roller rotation shafts 114 and 214 rotatably supported by the frames F and the bearings 113 and 213. That is, the lower rollers 110 and 210 supported at both ends by the roller support shafts 112 and 212 and the roller rotation shafts 114 and 214 are fixed in close contact with the force of the spring 115 fitted on the roller rotation shafts 114 and 214. 114, 214) in conjunction with the rotation.

As shown in detail in FIG. 3, the roller rotation shafts 114 and 214 are fitted with the sprockets 116 and 216 fixed to the outer circumferential surface, and the sprockets 116 and 216 transmit rotational force from a driving motor (not shown) through a chain (not shown). As it receives and rotates, the roller support shafts 112 and 212 and the lower rollers 110 and 210 supported by the roller rotation shafts 114 and 214 rotate together. The plurality of lower rollers 110 and 210 interlocked in such a manner transfers the workpiece W placed thereon.

As shown in FIG. 4, the processing chamber H of the inlet chamber N has an external cooling air therein to maintain the internal temperature relatively lower than the processing chamber H of the heating units A and B. Air circulation pipes 117 and 217 to circulate through the process chamber (H) are installed to penetrate the air, and heat exchangers 118 and 218 are provided around the air circulation pipes (117 and 217) to pass the air circulation pipes (117 and 217). The internal temperature of the processing chamber H is cooled to a predetermined temperature through heat exchange between the air and the internal air of the processing chamber H.

On the other hand, as shown in Figure 1, the lifting device 400 for transferring the workpiece (W) processed in each chamber (100,200) to the inlet side of the transfer chamber 300 on the outlet side of the upper and lower chambers (100,200) Is provided.

5 and 6, the elevating device 400 is supported by a plurality of guide rails 401 installed in the vertical direction on the left and right, and the elevating plate 402 to elevate up and down, and the elevating plate The lifting chamber 404 is installed on the 402 and is provided with a transport roller 403 for carrying the material to be processed W discharged on the lower rollers 110 and 210 of the upper and lower chambers 100 and 200 therein. In addition, the elevating plate 402 is connected to the drive chain 406 driven by the drive motor 405 and the sprocket to move up and down.

Hereinafter, the operation of the continuous firing furnace configured as described above will be described.

First, the paste is laminated on the surface of the glass substrate for PDP outside the firing furnace of the present invention to form a partition wall, and heated and dried at 100 to 150 ° C. for 10 to 15 minutes. The glass substrate (hereinafter, referred to as a to-be-processed material), which is the dry-treated material W, is charged into the continuous firing furnace of the present invention through the inlet to rotate the lower rollers 110 and 210 to transfer the treated material forward.

The said to-be-processed material W is heated to about 500-600 degreeC, passing through each processing chamber H of the heating parts A and B. As shown in FIG. In the meantime, the resin binder in the partition wall coated on the surface of the workpiece W is decomposed and mostly vaporized and discharged to the outside of the treatment chamber together with the clean air supplied into the treatment chamber H and removed.

Subsequently, the material to be treated W is heated at 500 to 600 ° C. for 5 to 30 minutes while passing through the processing chamber H of the crack part C to sinter the bulkhead on the surface, followed by quenching with the slow cooling part D. After passing through the portion (E), it is cooled, and then moved onto the carrying roller 403 of the lifting chamber 404 of the lifting device 400. At this time, the processing material discharged after being fired in the upper and lower chambers 100 and 200 is adjusted to be sequentially discharged toward the elevating device 400.

The workpiece W loaded on the conveying roller 403 is lowered to the inlet side position (Z in FIG. 5) of the conveying chamber 300 as the lifting driving mechanism is operated, and conveyed by the rotation of the conveying roller 403. After moving onto the conveyor 301, it is conveyed by the conveyor 301.

That is, when the workpiece is discharged from the upper chamber 100, the lifting chamber 404 of the lifting device 400 is disposed at the "X" position of FIG. 5 and discharged from the upper chamber 100. To the transport roller 403 to quickly descend to the "Z" position of Figure 5, the inlet of the transport chamber 300 is transported to the transport chamber. Subsequently, the elevating plate 402 moves to the "Y" position of FIG. 5, which is the discharge side of the lower chamber 200, and repeats the process described above for the material W discharged from the lower chamber 200 in the same manner. By conveying to the conveyance chamber 300, the to-be-processed material W discharged | emitted sequentially from the two chambers arrange | positioned in the up-and-down double row is carried, and it conveys to a conveyance chamber and processes it in order.

A chamber for firing the material to be processed for PDP is provided in two rows of upper and lower rows, and a lifting device is disposed at the exit of each chamber to quickly convey the processed material after the firing process, thereby doubling the productivity. Since the chamber and the lower chamber are constituted by separate chambers separated from each other, dust generated in the upper chamber can be prevented from adversely affecting the firing process in the lower chamber, thereby preventing occurrence of defects caused by dust.

In addition, since the lower roller is detachably installed, it is easy to remove and the replacement and repair work is easy. In particular, even if the lower roller is heated and expanded in the processing chamber, the spring absorbs the expanded amount, thereby damaging the heat. There is an effect that can prevent.

Claims (5)

The upper chamber 100 and the lower chamber 200 are divided into two upper and lower stages, and the material to be processed in the chambers 100 and 200 is loaded on the conveying conveyor 301 at the lower portion of the lower chamber 200. The conveyance chamber 300 which conveys in a horizontal direction is provided, and each said chamber 100 and 200 is an inlet chamber N, heating parts A and B, a crack part C, and a slow cooling part D according to processing temperature. And a series of processing chambers (H) divided into quenching sections (E), each of which is continuously disposed in a horizontal direction near the bottom of each chamber (100,200), each of which is installed in a transverse direction of the chamber (100,200). In the continuous firing furnace for the PDP paste film firing is provided with rollers 110 and 210, and each of the chambers 100 and 200 is provided with electrothermal heaters 104 and 204, respectively. The upper and lower chambers 100 and 200 are formed of independent chambers surrounded by ceiling walls 101 and 201, hearth walls 102 and 202, and left and right walls 103 and 203, respectively, and the ceiling walls for each processing chamber H of the chambers 100 and 200 respectively. An electrothermal heater (104, 204) is provided in (101, 201), respectively. The method of claim 1, wherein the firing treatment in the upper chamber 100 and the lower chamber 200 while being disposed in the vertical direction in the vertical direction outside the outlet of the upper chamber 100 and the lower chamber 200 to move up and down by the lifting mechanism And a workpiece lifting device 400 for carrying the workpiece to be discharged and transported to the inlet side of the transfer chamber 300. According to claim 2, The workpiece lifting device 400 is supported by a pair of guide rails 401 installed in the vertical direction on the left and right side, and elevating plate 402 for lifting up and down, and the elevating plate 402 Lifting chamber 404 and a driving motor 405, which are installed above and are provided with a conveying roller 403 for carrying the material to be processed W discharged on the lower rollers 110 and 210 of the chambers 100 and 200 therein. A continuous firing furnace for firing a PDP paste film, characterized in that it comprises an elevating drive mechanism for elevating the elevating plate 402 up and down by a rolling chain 406. The roller support shaft (112, 212) according to claim 1, wherein the lower rollers (110, 210) are formed in a tubular shape of ceramic material, and one end of the lower rollers (110, 210) is fixed to the frame (F). Slidingly supported on, the opposite end is fitted through the spring 115 to the front end of the roller rotation shaft (114,214) rotatably supported on the frame (F) via the bearing (113,213) roller roller (114,214) A continuous firing furnace for sintering a PDP paste film, characterized in that it rotates in conjunction with. According to claim 1, wherein the processing chamber (H) of the slow cooling unit (D) is the external cooling to maintain the internal temperature relatively lower than the processing chamber of the heating unit (A, B) and cracks (C) PDP paste, characterized in that the air circulation pipe 117,217 for circulating the air for the inside penetrates the inside of the processing chamber (H), and the heat exchanger (118,218) is provided around the air circulation pipe (117,217). Continuous firing furnace for film firing.