KR200461439Y1 - Apparatus for manufacturing fluorescent lamp - Google Patents

Abstract

Disclosed is a fluorescent lamp manufacturing apparatus for coating a phosphor on a glass tube and allowing the coated phosphor to be dried while having a uniform thickness.

The fluorescent lamp manufacturing apparatus of the present invention includes a base portion, a chamber coupled to the base portion, the chamber is connected to the front end of the glass tubes disposed in the cassette, the dry air supply unit connected to the chamber by a pipe, the dry air supply unit to generate dry air It includes a dry air generating unit, a dry air generating unit and a flow rate control unit connected through the pipeline.

Lamp, fluorescent, dry, coating, phosphor, chamber

Description

Fluorescent lamp manufacturing apparatus {Apparatus for manufacturing fluorescent lamp}

The present invention relates to a device for manufacturing a fluorescent lamp, and more particularly to a fluorescent lamp manufacturing apparatus for coating a phosphor on a glass tube and the coated phosphor to be dried while having a uniform thickness.

In general, fluorescent lamps include Cold Cathode Fluorescent Lamps (CCFLs) and External Electrode Fluorescent Lamps (EEFLs). These fluorescent lamps are manufactured through a sealing process of injecting gas and mercury and sealing them to a certain size after exhausting the inside of the glass tube for manufacturing the lamp. That is, the fluorescent lamp is sealed after a certain amount of argon gas and mercury are sealed in a state in which a phosphor is coated inside a glass tube for manufacturing a lamp, and includes two electrodes inside or outside both ends of the sealed glass tube. When a high voltage is applied to two electrodes, the phosphor discharges electrons inside the glass tube and excites ultraviolet rays so that the electrons collide with mercury and emit visible light. Performance and driving quality of the fluorescent lamp This is a factor that has a big impact on.

The process of coating such phosphor on the inside of the glass tubes coats the pretreatment solution on the inner wall of the glass and coats the phosphor on the pretreatment solution layer. At this time, the glass tubes are placed in the cassette in a standing shape, and the above-described process is performed. Then, dry air is supplied into the glass tube at a constant pressure to dry the phosphor. At this time, in the process of constantly supplying dry air to dry the phosphor inside the glass tube, as shown in Figure 4, the phosphor flows downward by its own weight to the upper portion (A), the middle portion (B), As the thicknesses d1, d2, and d3 of the phosphors f1, f2, and f3 increase in the lower part C, the performance of the fluorescent lamp decreases, causing a defect.

Therefore, the present invention is proposed to solve the above problems, an object of the present invention is to prevent the fall of the quality of the fluorescent lamp to ensure that the thickness of the phosphor uniformly dried in the process of drying the phosphor coated inside the glass tube. It is to provide a fluorescent lamp manufacturing apparatus.

In order to achieve the above object, the present invention includes a base portion, a chamber coupled to the base portion and the front end of the glass tubes disposed in the cassette is connected, a dry air supply unit connected to the chamber by a pipe, the drying The air supply unit provides a fluorescent lamp manufacturing apparatus including a dry air generating unit for generating dry air, and a flow rate adjusting unit connected to the dry air generating unit through a conduit.

Preferably, the flow rate control unit includes on / off valves installed in a conduit connecting the drying air generator and the chamber, and a controller to control the opening and closing by selecting the on / off valves.

Preferably, the flow rate control unit is provided with a flow rate control valve in the conduit connecting the drying air generating unit and the chamber.

Preferably, a buffer valve is provided in the conduit between the open / close valves and the chamber to prevent a rapid passage of dry air supplied to the chamber.

The present invention provides a technology having opening and closing valves to sequentially supply the flow rate of the dry air inside the glass tube coated with phosphors to supply a sufficient amount of dry air after the phosphor is coated before the phosphors flow down. Afterwards, in order to adjust the drying speed, the supply of dry air is smaller than the amount of dry air supplied first, and the maximum air volume is finally supplied for complete drying. Has the effect of preventing the quality of the fall.

In addition, the present invention is provided with a buffer valve for buffering and supplying the dry air rapidly supplied through the opening and closing valve to prevent the phosphor coating from instantaneous splashing of the phosphor coating to prevent the degradation of the fluorescent lamp can be prevented. .

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

2 is a configuration diagram for explaining an embodiment of the present invention, and shows a device for coating a phosphor on a glass tube. The apparatus for coating a phosphor on a glass tube includes a base portion 101, a chamber 103 coupled to the base portion 101, a dry air supply portion 105 supplying dry air to the chamber 103, and a chamber 103. It includes a vacuum generating unit 107 to form a negative pressure in the.

The base portion 101 described above includes a frame made of a frame or the like, and further includes a movable plate 109 and a moving plate 109 which are brought into close contact with the chamber 103 to move in close contact with the chamber 103. It may include a lower portion (111). In the internal space of the base unit 101, a cassette C into which a plurality of glass tubes G are inserted may be accommodated, and a phosphor capable of supplying a phosphor to the inside of the glass tubes G inserted into the cassette C. Solution supply 113 may be disposed.

The moving plate 109 is arranged to ascend or descend by the lifting and lowering part 111. The lifting and lowering part 111 may be any structure as long as the lifting and lowering part 111 may be made of a hydraulic pressure, a pneumatic cylinder, a screw, or the like so that the moving plate 111 may be brought into close contact with the chamber 103. The moving plate 109 is provided with holes into which the tip of the glass tubes G described above can be fitted.

Cassette (C) can be fixed by fitting the glass tube (G) to the upper and lower sides. Such a cassette C can be fitted with a large amount of glass tubes at the same time. In the cassette C, the glass tube is arranged in the longitudinal direction and fixed to the holes of the moving plate 109. Therefore, when the moving plate 109 moves in the up and down directions, the cassette C may also be moved in the up and down directions. When the moving plate 109 is in close contact with the chamber 109, the ends of the glass tubes G may communicate with the chamber 103.

On the other hand, the solution supply unit 113 may be used in the pretreatment solution, the solvent of the pretreatment solution, the phosphor, the solvent of the phosphor in each container according to each step.

The embodiment of the present invention may be applied to any structure in which a glass tube is dipped in a solvent so that the phosphor is coated inside the glass tube and the phosphor inside the glass tube can be dried. The apparatus for coating the phosphor described in the embodiment of the present invention in the glass tube is not limited to the example described in the embodiment of the present invention can be carried out in a variety of devices.

Subsequently, the dry air supply unit 105 is connected to the dry air generating unit 121 through the pipeline p1. In addition, a flow rate adjusting unit is provided in a conduit between the chamber 103 and the dry air generating unit 121. The flow rate control unit includes a first on / off valve 125, a second on / off valve 127, and a third on / off valve 129, and includes a controller C that selects and opens respective on / off valves. The first open / close valve 125, the second open / close valve 127, and the third open / close valve 129 may be connected to each other in parallel. The first open / close valve 125, the second open / close valve 127, and the third open / close valve 129 are valves having different flow rates through which dry air passes. That is, when the three on-off valves are described as an example in an embodiment of the present invention, the first on-off valve 125 may pass a medium flow rate among the three on-off valves and the second on-off valve The valve 127 may pass a smaller flow rate than the first open / close valve 125 and the third open / close valve 129 may pass a larger flow rate than the first open / close valve 125. Of course, in the embodiment of the present invention, the first on-off valve 125, the second on-off valve 127, and the third on-off valve 129 may pass through dry air having different capacities and may include at least two or more. In some cases, four or five on / off valves may be used. In addition, the flow rates passing through the first open / close valve 125, the second open / close valve 127, and the third open / close valve 129 may be set differently according to drying conditions of the phosphor. On the other hand, the first on-off valve 125, the second on-off valve 127, the third on-off valve 129 are respectively connected to the flowmeters 141, 143, 145 that the operator can check the flow rate through the outside Can be.

On the other hand, the buffer valve 123 is provided in the conduit between the chamber 103 and the flow rate control unit. The above-mentioned buffer valve 123 prevents the coating defect of the phosphor from splashing or peeling off as the phosphor coated inside the glass tube is rapidly introduced into the glass tubes when a large amount of dry air is supplied to the glass tubes G. By doing so, the flow rate can be supplied while being buffered for a certain time. The buffer valve 123 may be used conventional valves that are controlled by the air pressure.

In addition, the vacuum generator 107 includes an inhaler 151 connected to the chamber 103, and a vacuum pressure is applied to the pipe line p2 connecting the vacuum generator 107 and the chamber 103 to the chamber 103. It is provided with a vacuum opening and closing valve 153 to act on. And the vacuum opening and closing valve 153 is connected to the controller 131 is made to control. The vacuum generating unit 107 generates a negative pressure in the chamber 103 so that the phosphor is sucked into the glass tubes G so that the phosphor is coated on the inner surfaces of the glass tubes G.

If described in detail the operation of the embodiment of the present invention as follows.

First, driving the up and down portion 111 to move the cassette (C) downward so that the end of the glass tube (G) is contained in the phosphor solution accommodated in the phosphor solution supply 113. At this time, the controller 131 controls the vacuum open / close valve 153 to be in an open state. Then, negative pressure is generated in the chamber 103, and negative pressure is also generated in the glass tubes G connected to the chamber 103. Then, the phosphor is coated inside the glass tubes while being sucked into the phosphor solution glass tubes (G). At this time, the rising and lowering part 111 is raised. The glass tubes G are then separated from the phosphor solution of the phosphor solution supply unit 113. As such, the process of applying the phosphor to the inside of the glass tubes (G) is not limited to the example described in the embodiment of the present invention, it can be made in various ways.

At this time, the phosphor coated on the inside of the glass tubes (G) needs to be quickly dried to a uniform thickness before flowing down. To this end, the controller 131 controls the opening of the first on-off valve 125 to supply dry air to the chamber 103. The first on-off valve 125 supplies a larger amount of dry air than the second on-off valve 127, and the third on-off valve 129 has a higher capacity of dry air than the first on-off valve 125. Since it is possible to supply the appropriate amount of dry air is supplied to the chamber 103 while passing through the buffer valve 123. The dry air supplied to the inside of the glass tubes G instantly dries the phosphor before the phosphor flows down so that the phosphor f4 (shown in FIG. 3) is dried to a uniform thickness (d4, shown in FIG. 3). To be done.

The controller 131 controls the first on-off valve 125 in the off state and simultaneously controls the second on-off valve 127 in the open state. Then, the dry air passing through the second open / close valve 127 is also supplied into the glass tubes G through the chamber 103. The dry air passing through the second on / off valve 127 and supplied into the glass tubes G has a smaller flow rate than the dry air supplied to the glass tube G through the first on / off valve 125. Thus, supplying a relatively large amount of dry air at first and then supplying a small amount of dry air at a later time is to allow the phosphor to be uniformly dried throughout the time. In addition, the phosphor coated on the inside of the glass tube is to be dried while having a sufficient drying time. Thus, when the phosphor is dried while having a sufficient drying time, it is possible to obtain a good dry state without the occurrence of cracks.

Subsequently, the controller 131 controls the second on / off valve 127 to be in an off state and controls the third on / off valve 129 to open. Then, the dry air passing through the third open / close valve 129 is supplied into the glass tubes G through the chamber 103. The dry air passing through the third open / close valve 129 and supplied into the glass tubes G has a higher flow rate than the dry air supplied through the first open / close valve 125 and supplied to the glass tube G. Therefore, since the phosphor coated inside the glass tubes G supplies a sufficient amount of dry air to the lower ends of the glass tubes G, complete drying may be performed. Therefore, the phosphor coated inside the glass tube G may have a better dry state.

In the exemplary embodiment of the present invention, the first on-off valve 125, the second on-off valve 127, and the third on-off valve 129 have been described with reference to an example in which an on-off valve having three different capacities is formed. It is possible to include an on-off valve having different capacities as described above, and if necessary, five on-off valves having different capacities are installed and sequentially operated or selected to supply different amounts of dry air into the glass tubes G. It is also possible.

On the other hand, the dry air passing through the first on-off valve 125 is prevented from rapidly entering the chamber 103 and the glass tube (G) while passing through the buffer valve 123 is damaged the phosphor coated inside the glass tube Can be prevented.

Through such a drying process, the phosphor coating thickness d4 is maintained relatively constant through the embodiment of the present invention, as shown in FIG. 3. Therefore, it is possible to prevent the coating defect of the phosphor from occurring inside the glass tubes (G) in the process of manufacturing the fluorescent lamp.

In the embodiment of the present invention has been described by showing an example consisting of a plurality of on / off on-off valves and a controller for opening and closing them, but is not limited to this one flow control valve can be installed to adjust the flow rate It is also possible to have a structure that is.

1 is a view illustrating a state in which a phosphor is coated inside a glass tube and dried through a general drying process.

2 is a view schematically showing a fluorescent lamp manufacturing apparatus for explaining an embodiment of the present invention.

3 is a diagram schematically illustrating the main parts of FIG. 2.

4 is a view showing a state in which a phosphor is coated and dried on a glass tube through an embodiment of the present invention.

Claims (4)

A base portion, a chamber coupled to the base portion and having a front end portion of the glass tubes disposed in the cassette, and a dry air supply portion connected to the chamber by a pipeline; The dry air supply unit Dry air generating unit for generating dry air, and includes a flow rate control unit connected to the drying air generating unit and the conduit, The flow control unit On-off valves installed in a conduit connecting the dry air generating unit and the chamber; A controller for controlling opening and closing by selecting the opening and closing valves, In the conduit between the on-off valves and the chamber A buffer valve is provided to prevent rapid passage of dry air supplied to the chamber, The on-off valves A first open / close valve, a second open / close valve, and a third open / close valve, The first on-off valve, the second on-off valve, and the third on-off valve are arranged in parallel, The first on-off valve has a capacity to allow a greater amount of dry air to pass through than the flow rate passing through the second on-off valve, and the second on-off valve delivers less amount of dry air than the flow rate on the first on-off valve. Has a capacity to pass through, and the third on-off valve has a capacity to pass a larger amount of dry air than a flow rate passing through the first on / off valve, The controller controls the first on-off valve, the second on-off valve, and the third on-off valve to operate sequentially to supply dry air to the chamber, Each flow passage connecting the first opening / closing valve, the second opening / closing valve, and the third opening / closing valve includes a flow meter capable of confirming flow rates of the first opening / closing valve, the second opening / closing valve, and the third opening / closing valve. Fluorescent lamp manufacturing apparatus is provided. delete delete delete

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