JP2009122395A - Method of disassembling plasma display panel and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disassembling method for utilizing glass and aluminum which are included in a glass base board and an aluminum chassis which constitute a plasma display panel, and also provide a device therefor. <P>SOLUTION: This is the method of disassembling a plasma display panel which is composed of a glass panel which comprises a front surface glass base board and a back surface glass base board, and an aluminum chassis bonded to the glass panel via a double-face adhesive tape. In this case, after the front surface glass base board is cut off and removed, the plasma display panel is heated by a heating device, from the side of the connection face at which the back surface glass base board and the aluminum chassis are joined together, under the condition that the plasma display panel is hung by a hanging device, and the adhesive of the double-face adhesive tape is fluidized to drop and remove the back surface glass base board, and then additional heating is made from the side surface of the aluminum chassis to incinerate the double-face adhesive tape to conduct exfoliation processing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention industrially separates an aluminum chassis, a glass substrate and a double-sided adhesive tape of a plasma display panel (hereinafter referred to as PDP) of defective products generated from the plasma TV manufacturing process and waste generated after using the plasma TV. And the device.

  Recently, CRT TVs have disappeared from the market and replaced with plasma TVs and LCD TVs. Therefore, the production of plasma televisions has increased rapidly, and there is an interest in processing defective products associated with manufacturing and recycling technologies for old plasma televisions.

  The PDP is composed of a front glass substrate, a rear glass substrate, a double-sided adhesive tape having a thickness of about 1 mm, and an aluminum chassis as shown in FIG. The front glass substrate and the back glass substrate are welded at the periphery, and in order to separate them, it is necessary to apply a temperature higher than the welding temperature. The back glass substrate and the aluminum chassis are firmly bonded with a double-sided adhesive tape made of urethane resin containing aluminum oxide, etc., and it is necessary for the operator to remove the double-sided adhesive tape manually. It took a lot of time.

  In view of this, a dismantling method for separating the plasma display and the metal plate by inductively heating the panel with the metal plate has been proposed (see Patent Document 1). In addition, a technique for separating the aluminum chassis and the glass panel by heating from the aluminum chassis side of the PDP is also disclosed (see Patent Document 2).

JP 2004-111092 A JP 2006-15294 A

  However, the technique disclosed in Patent Document 1 requires an expensive facility for performing induction heating when the plasma display and the metal plate are separated, and at the same time, it is difficult to perform a large amount of dismantling processing. there were. Moreover, although the technique of the said patent document 2 heats from the aluminum chassis side of PDP and isolate | separates an aluminum chassis and a glass panel, there is no suggestion about the technique which gives uniform heating from the aluminum chassis side of a lot of PDPs. Was not made.

  Therefore, the present invention has been made in view of the above-described conventional problems, and it is possible to industrially separate a large amount of PDP, which eliminates the manual work of the operator and is low in cost, and remains in the aluminum chassis. The present invention also provides a PDP separation method and apparatus capable of easily peeling an adhesive tape.

  Therefore, the method for separating a PDP according to the present invention is a method for separating a PDP comprising a glass panel composed of a front glass substrate and a back glass substrate, and an aluminum chassis joined via a double-sided adhesive tape. After the substrate is cut and removed, the PDP is suspended by a suspension device and heated from the joining surface side of the rear glass substrate and the aluminum chassis by a heating device, and the adhesive of the double-sided adhesive tape is fluidized to form the rear surface. The first feature is that the glass substrate is dropped and removed, and further, the double-sided adhesive tape is ashed by heating from the side surface of the aluminum chassis to perform a peeling treatment.

  The second feature is that the heating from the joining surface side of the rear glass substrate and the aluminum chassis by the heating device is hot air heating from a hot air generating furnace, and the heating temperature is 200 ° C. to 400 ° C. .

  The third feature is that the heating temperature from the side surface of the aluminum chassis by the heating device is 400 ° C to 500 ° C.

  Furthermore, the peeling treatment is characterized in that the aluminum chassis surface on which the double-sided adhesive tape is ashed is sprayed and peeled off by spraying water at normal temperature onto the ashed product of the double-sided adhesive tape.

  In addition, the PDP separation apparatus of the present invention is an apparatus for separating a PDP composed of a glass panel composed of a front glass substrate and a rear glass substrate and an aluminum chassis joined via a double-sided adhesive tape, A suspension base for hanging the PDP, a separation device main body for introducing the base, a hot air generating furnace for sending hot air to the separation device main body, a circulation fan for circulating the hot air, and an exhaust from the separation device main body A deodorizing furnace for treating exhaust gas, and a fifth feature is that uniform hot air is sent to a suspension base in which a plurality of PDPs are suspended by a rectifying plate provided in the main body of the separator. .

  According to the method for separating a PDP according to the present invention, after the front glass substrate is cut and removed, the PDP is suspended by a suspension device and heated by a heating device from the joining surface side of the rear glass substrate and the aluminum chassis. Since the adhesive of the double-sided adhesive tape can be fluidized and the back glass substrate can be dropped and removed, a large amount of PDP can be efficiently separated without requiring manual work or chemicals.

  Further, the heating from the joining surface side of the rear glass substrate and the aluminum chassis by the heating device is hot air heating from the hot air generator, and the heating temperature is 200 ° C. to 400 ° C. Therefore, both the rear glass substrate and the aluminum chassis are heated. Can be heated, and the double-sided adhesive tape can be efficiently fluidized.

  And since the heating temperature is 400 to 500 degreeC from the side surface of the aluminum chassis by a heating apparatus, it has the outstanding effect that an aluminum chassis does not change in quality.

  And it can peel easily by spraying the water of normal temperature on the ash of a double-sided adhesive tape on the aluminum chassis surface which ashed double-sided adhesive tape.

  Furthermore, the PDP separation device of the present invention is a suspension frame for suspending a plurality of PDPs, a separation device main body for introducing the frame, a hot air generator for supplying hot air to the separation device main body, and circulating hot air. A suspension base comprising a circulation fan and a deodorizing furnace for treating exhaust gas exhausted from the separator main body, and a plurality of PDPs with uniform hot air suspended from a rectifying plate provided in the separator main body Can be insufflated.

  Hereinafter, a PDP separation method and apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of the structure of the PDP, FIG. 2 is an explanatory perspective view showing a frame on which the PDP is suspended, FIG. 3 is an explanatory perspective view of the separator main body, FIG. 4 is an explanatory diagram of the internal structure of the separator main body, and FIG. It is a block diagram which shows the structure of the separation apparatus of PDP of this invention.

  First, a PDP separation method will be described. FIG. 1 shows a general structure of a PDP 1, in which a glass panel 4 composed of a front glass substrate 2 and a rear glass substrate 3 and an aluminum chassis 5 are bonded by a double-sided adhesive tape 6 having a thickness of 1 mm. Note that electrical wiring and the like are omitted.

  The front glass substrate 2 of the PDP 1 is cut and removed in advance by a tool such as a glass cutting cutter to reduce the weight of the PDP 1 and at the same time reduce the amount of heat required for heating described later. Next, the ends of the aluminum chassis 5 of the plurality of PDPs 1 are hung by the hanging metal fittings 9 attached to the hanging bar 8 provided at the upper part of the gantry 7 shown in FIG. At this time, the two PDPs 1 are attached close to the aluminum chassis 5 side, and an optimal gap (for example, 10 cm) is secured on the back glass substrate 3 side when hot air circulation or water spray described later is performed. Since the PDP 1 has various sizes, the hanging direction is changed depending on the size.

  Then, the lid 11 of the separator main body 10 shown in FIG. 3 is opened, and the plurality of PDPs 1 are arranged in a direction orthogonal to the current plate 12 made of a heat-resistant perforated plate installed inside the separator main body 10. The base 7 is inserted and the lid 11 is closed. Hot air, which will be described later, is rectified by the rectifying plate 12, and uniform hot air is supplied from the bonding surface side of the rear glass substrate 3 of the plurality of PDPs 1 and the aluminum chassis 5.

  Next, as shown in FIGS. 4 and 5, the inside of the separator main body 10 is heated to 150 to 200 ° C. by a hot air generating furnace 13 connected to the separator main body 10, and the circulation fan 14 is further operated to operate the separator main body. 10 is heated to 200 to 400 ° C. at which the double-sided adhesive tape 6 is fluidized, and the rear glass substrate 3 of the PDP 1 is dropped and separated. Incidentally, the double-sided adhesive tape 6 partially remains on the surface of the aluminum chassis 5. Note that the waste gas generated in the separation device main body 10 is burned by the deodorizing furnace 15 and deodorized.

  And the aluminum chassis 5 which isolate | separated the back surface glass substrate 3 is further heated up by a hot-air generator 13 to 400 to 500 degreeC, and is heated, and the double-sided adhesive tape 6 which remains on the surface of the aluminum chassis 5 is ashed. At this time, control is performed so that the temperature does not exceed 500 ° C. at which the aluminum chassis 5 changes in quality.

  After the double-sided adhesive tape 6 is completely incinerated, the operation of the hot air generating furnace 13 and the circulation fan 14 is stopped to lower the temperature in the separation apparatus main body 10, the lid 11 is opened, and the gantry 7 is taken out. When the temperature of the chassis 5 reaches substantially normal temperature, the ashed double-sided adhesive tape 6 is peeled off by spraying normal temperature water from the surface of the aluminum chassis 5 where the ashed double-sided adhesive tape 6 remains.

  According to the PDP separation method of the present invention having the above-described configuration, a large amount of PDP can be efficiently separated without requiring manual work or chemicals. Moreover, the aluminum chassis does not change in quality, and the remaining double-sided adhesive tape can be easily peeled off. The separated aluminum chassis is reused as an aluminum ingot, and the glass on the glass substrate is crushed and effectively used as a silica raw material for cement.

  Next, the PDP separation apparatus of the present invention will be described with reference to FIGS. As shown in the figure, a PDP separation apparatus 100 according to the present invention comprises a separation apparatus main body 10, a hot air generation furnace 13, and a deodorization furnace 15, and separates hot air from a heavy oil burner 16 connected to the hot air generation furnace 13. The circulation fan 14 is connected to the main body 10 via a pipe 17 connecting the main body 10 and the hot air generating furnace 13 to increase the amount of hot air in the main body 10 and at the same time improve the thermal efficiency. Further, a heavy oil burner 18 is attached to the deodorizing furnace 15, and waste gas generated from the separator main body 10 is heated to 800 to 850 ° C. to burn odor components.

  A rectifying plate 12 made of a metal or ceramic perforated plate is provided in the inside of the separator main body 10 perpendicular to the flow direction of the hot air, and rectifies the hot air from the hot air generating furnace 13 to divide the inside of the separator main body 10. A uniform hot air is supplied to the air. In addition, the gantry 7 in which the above-described plurality of PDPs are suspended is put into the separating apparatus main body 10 by opening and closing the lid 11, and the glass substrate and the aluminum chassis are separated. The rectifying plate 12 may be not only a plate having a large number of holes, but also a metal plate or the like provided with uniform slits in the vertical or horizontal direction, and the mounting position thereof is the hot air generating furnace 13 side or the hot air discharge side. It doesn't matter. In order to separate the PDP thrown into the separation apparatus main body 10 in 2 to 2.5 hours, the speed of the hot air in the separation apparatus main body is set to 0.2 to 0.4 m / sec in terms of 300 ° C. at 1 atm. It is desirable to do.

  Twenty-six 42-inch PDPs were hung on a gantry together with the aluminum chassis side, placed in the separation apparatus main body, and heated up sequentially in a hot air generating furnace to 250 ° C., and then subjected to separation treatment for 1 hour. At this time, the current plate and the circulation fan were not installed, and the temperature was controlled so as not to exceed 400 ° C. The wind speed was 0.16 m / sec in terms of 300 ° C. at 1 atm. Note that the front glass substrate of the PDP was previously cut and removed by a glass cutting cutter.

(result)
The glass substrate of the PDP installed at the center position of the separator main body dropped, but the glass substrate remained on the PDP near the wall of the separator main body.

  The treatment was performed by installing a current plate and a circulation fan under the same conditions as in Example 1. At this time, the wind speed was 0.22 m / sec in terms of 300 ° C. at 1 atmosphere, and the wind speed in the hole was 20 m / sec.

(result)
Although all the glass substrates of the PDP installed in the separator main body were dropped, a carbonized double-sided adhesive tape remained on the surface of the aluminum chassis, which could not be removed after washing with water after cooling.

  The treatment was performed under the same conditions as in Example 2, and further heated to 500 ° C. for 1 hour. After treatment, the frame was left for 30 minutes, and the gantry was taken out from the main body of the separator. At that time, room temperature water was sprayed.

(result)
All of the glass substrates of the PDP installed in the separator main body dropped, and all of the double-sided adhesive tape on the aluminum chassis surface was ashed.

  A 32-inch size PDP is vertically placed in two rows and 52 sheets on the aluminum chassis side, suspended on a gantry, put into the main body of the separation apparatus, separated for 1.5 hours under the same conditions as in Example 2, and further up to 500 ° C. It was heated and treated for 1 hour. After the treatment was completed, it was allowed to stand for 30 minutes, and the gantry was taken out from the main body of the separation apparatus. When the temperature of the aluminum chassis became substantially room temperature, water at room temperature was sprayed.

(result)
All the glass substrates of the PDP installed in the main body of the separator were dropped, and all of the double-sided adhesive tape on the surface of the aluminum chassis was ashed.

  The PDP separation method and apparatus according to the present invention is effective for defective products accompanying an increase in the production of plasma televisions in the future and an increase in waste PDPs due to the lifetime of products to be produced in the future. Is available.

It is structure explanatory drawing of PDP. It is perspective explanatory drawing which shows the mount frame which suspended PDP. It is a perspective explanatory view of the separation device main body of the separation device of the PDP of the present invention. It is internal structure explanatory drawing of the separator main body of the separator of PDP of this invention. It is a block diagram which shows the structure of the separation apparatus of PDP of this invention.

Explanation of symbols

1 PDP
DESCRIPTION OF SYMBOLS 2 Front glass substrate 3 Back glass substrate 4 Glass panel 5 Aluminum chassis 6 Double-sided adhesive tape 7 Base 8 Suspension bar 9 Suspension metal fitting 10 Separator main body 11 Lid 12 Current plate 13 Hot-air generating furnace 14 Circulating fan 15 Deodorizing furnace 16, 18 Heavy oil burner 17 Pipe 100 Separator

Claims (5)

  A plasma display panel separation method comprising a glass panel composed of a front glass substrate and a rear glass substrate and an aluminum chassis bonded via a double-sided adhesive tape, after cutting and removing the front glass substrate, While the plasma display panel is suspended by a suspension device, it is heated by a heating device from the joining surface side of the rear glass substrate and the aluminum chassis, the adhesive of the double-sided adhesive tape is fluidized, and the rear glass substrate is dropped and removed. And separating the plasma display panel by heating from the side surface of the aluminum chassis to ash the double-sided adhesive tape and performing a peeling treatment.   The heating from the joining surface side of the back glass substrate and the aluminum chassis by the heating device is hot air heating from a hot air generating furnace, and the heating temperature is 200 ° C to 400 ° C. Method for separating plasma display panels.   The method for separating a plasma display panel according to claim 1, wherein the heating temperature from the side surface of the aluminum chassis by the heating device is 400 to 500 ° C.   2. The plasma display panel separation according to claim 1, wherein the peeling treatment is performed by spraying water at room temperature onto an aluminum chassis surface on which the double-sided adhesive tape is ashed to peel off the ashed product of the double-sided adhesive tape. Method.   A device for separating a plasma display panel comprising a glass panel composed of a front glass substrate and a rear glass substrate and an aluminum chassis joined via a double-sided adhesive tape, the suspension base for hanging a plurality of plasma display panels A separator main body for introducing the gantry, a hot air generating furnace for sending hot air to the separator main body, a circulating fan for circulating the hot air, and a deodorizing treatment for exhaust gas exhausted from the main body of the separator An apparatus for separating a plasma display panel, characterized in that a uniform hot air is sent to a suspension base on which a plurality of plasma display panels are suspended by a rectifying plate provided in the body of the separation apparatus.

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