KR100946215B1 - Spray nozzle system for etching a glass - Google Patents

Abstract

The present invention relates to a spray nozzle system for a glass etching that can etch the outer surface of the glass, the glass etching spray nozzle system for etching a glass, a fixing jig for fixing the glass, and fixed to the fixing jig Side injection means which is disposed on both sides of the glass to inject the etching liquid to both sides of the glass, and the upper injection means disposed on the upper portion of the glass fixed to the fixing jig to inject the etching liquid from the upper portion of the glass to the lower side The fixed jig is provided with a reciprocating means capable of reciprocating the glass fixed to the fixed jig in the longitudinal direction of the fixed jig by reciprocating the fixed jig in the longitudinal direction of the fixed jig. The side injection means and the upper injection means Etching liquid supply means for supplying each liquid at a constant pressure is provided, the etching liquid supply means is an etching liquid storage tank for storing the etching liquid, and the etching liquid stored in the etching liquid storage tank at a predetermined pressure side injection means or upper injection A pump capable of supplying to the means, a filter mounted between the side injection means and the pump or between the upper injection means and the pump to filter impurities contained in the etchant supplied through the pump to the side injection means or the upper injection means, An on / off valve mounted between the side injection means and the filter or between the upper injection means and the filter to supply or block an etchant to the side injection means or the upper injection means, and to adjust the voltage frequency supplied to the pump connected to the pump By means of a side injection means or It consists of a voltage frequency control unit for adjusting the pressure of the etchant supplied to the secondary injection means. The glass nozzle spray nozzle system according to the present invention having such a structure can inject the etching liquid to both sides and the upper portion of the glass loaded by the side injection means and the upper injection means through the fixing jig, The pressure can be varied through the voltage frequency controller. Therefore, the spray nozzle system for glass etching according to the present invention can effectively etch the surface of the glass by using the side injection means and the voltage frequency adjusting unit, and uniformly the thickness of the glass by operating the upper injection means together with the side injection means. It can be easily etched.

Description

Spray nozzle system for glass etching {SPRAY NOZZLE SYSTEM FOR ETCHING A GLASS}

The present invention relates to a spray nozzle system for glass etching that can etch glass, and in particular, while spraying the etching liquid from both sides and the upper portion of the glass, it is possible to modify the path in which the etching liquid is injected through the nozzle, the etching liquid The present invention relates to an injection nozzle system for glass etching, which can freely change the injection pressure, and can effectively remove various sludge that adheres to the nozzle over time.

In general, a method of etching glass includes an immersion type etching method of immersing the glass in a container filled with an etchant and etching the surface of the glass and spraying the etching solution on both sides of the glass.

However, the immersion etching method has a problem that not only the appearance of the glass is not uniformly etched by the nonuniformity of the glass itself, but also that impurities generated in the etching process adhere to the glass, thereby making the surface of the glass not smooth. There was a problem that the thickness of the bottom and top is not etched equally.

On the other hand, the injection etching method is applied to the side injection method for injecting the etchant from both sides of the glass and the downstream method for flowing the etchant from the top of the glass bar, the side injection method is installed adjacent to both sides of the glass predetermined Although the sludge attached to the glass surface can be effectively removed by spraying the etching liquid with the pressure on both sides of the glass in consideration of the spray map, the sludge generated from the glass is easily fixed to the inlet of the nozzle. There was this.

In addition, there is a problem that the sludge fixed to the inlet of the nozzle may disturb the injection path of the etchant injected through the nozzle, there is a problem that can weaken the injection pressure of the etchant.

On the other hand, the downstream method does not use a spray nozzle, it is a method that flows the etching liquid from the top of the glass to the bottom, there is no problem for clogging the nozzle, remove the sludge generated on the glass surface or foreign matter fixed on the glass surface There is a problem of lack of ability.

On the other hand, the problem that the side injection method and the downstream method has a problem that the ultra-slim glass may be broken due to uneven injection pressure when applied to a flat panel display that is currently ultra-slim to less than 0.4mm, local to the glass Phosphorus stress is generated or the weight of the glass is biased to one side there was a problem that the glass can be broken.

In addition, there is a problem that the uniformity of the upper and lower portions of the glass falls and at the same time the uniformity of the outer periphery is sharply deteriorated, which may cause a process defect in the subsequent scribing process.

Accordingly, the present invention solves the structural problem according to the conventional glass nozzle spray nozzle system as described above, by spraying the etching liquid from both sides and the upper portion of the glass effectively reduce the thickness of the glass and at the same time uniform thickness of the glass It is an object of the present invention to provide a spray nozzle system for glass etching which can effectively remove sludge that is fixed to the nozzle over time.

The glass etching spray nozzle system of the present invention for achieving the above object is a glass etching spray nozzle system capable of etching the glass, the fixing jig for fixing the glass, the glass of the fixed jig It is disposed on both sides of the side injection means for injecting the etching liquid to the both sides of the glass, and the upper injection means disposed on the upper portion of the glass fixed to the fixing jig to inject the etching liquid from the upper portion of the glass and The fixed jig is equipped with reciprocating means capable of reciprocating the glass fixed to the fixed jig in a linear direction by reciprocating the fixed jig by a predetermined distance in a linear direction, and the side injection means and the upper injection means To supply the etching liquid to the side injection means and the upper injection means at a constant pressure. Is equipped with an etchant supply means, the etchant supply means is an etchant storage tank for storing the etchant, a pump that can supply the etchant stored in the etchant storage tank to the side injection means or upper injection means at a predetermined pressure, the A filter which is mounted between the side injection means and the pump or between the upper injection means and the pump to filter impurities contained in the etchant supplied through the pump to the side injection means or the upper injection means, and is connected to the pump and supplied to the pump By adjusting the voltage frequency, the voltage frequency control unit for adjusting the pressure of the etchant supplied to the side injection means or the upper injection means through the pump.

 The glass nozzle spray nozzle system according to the present invention having such a structure can inject the etching liquid to both sides and the upper portion of the glass loaded by the side injection means and the upper injection means through the fixing jig, The pressure can be varied through the voltage frequency controller.

Therefore, the spray nozzle system for glass etching according to the present invention can effectively etch the surface of the glass by using the side injection means and the voltage frequency adjusting unit, and uniformly the thickness of the glass by operating the upper injection means together with the side injection means. It can be easily etched.

The glass nozzle spray nozzle system according to the present invention having such a structure can inject the etching liquid to both sides and the upper portion of the glass loaded by the side injection means and the upper injection means through the fixing jig, The pressure can be varied through the voltage frequency controller.

In addition, by mounting a compressed air supply means for supplying air at a constant pressure in the passage through which the etching liquid flows it is possible to increase the injection pressure of the etching liquid injected through the nozzle.

In addition, the compressed air supply means can spray only the pure air excluding the etchant to the nozzle from which the etchant is ejected, it is possible to effectively remove the sludge fixed on the nozzle.

Therefore, the spray nozzle system for glass etching according to the present invention can effectively etch the surface of the glass by using the side injection means and the voltage frequency control unit capable of adjusting the injection pressure of the etching liquid, the upper injection means together with the side injection means By simultaneously operating or sequentially operating there is an effect that can maintain the thickness of the glass uniformly.

In addition, since the sludge fixed on the nozzle can be effectively removed using compressed air, the spray path of the etchant injected through each nozzle can be fixed constantly, and the injection pressure of the etchant is increased due to the sludge fixed on the nozzle. There is an effect of not lowering.

First, prior to entering the detailed description of the present invention, if it is determined that the detailed description of the known technology or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the terms to be described later are defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user, the operator, and the like. It should be made based on the contents.

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

1 is a perspective view of a first embodiment of a glass etching spray nozzle system according to the present invention, Figures 2 and 3 is a schematic diagram until the etching liquid capable of etching the glass is injected into the glass through the nozzle, 4 is a perspective view of the left and right rotation means capable of rotating the left and right upper injection means provided in the present invention.

5 is a first embodiment of a reciprocating means capable of reciprocating a fixed jig in a linear direction, and FIG. 6 is a perspective view of a second embodiment of a glass nozzle spray nozzle system according to the present invention. 7 and 8 are the first and second embodiments of the raising and lowering means capable of raising or lowering the side injection means provided in the present invention.

9 is a schematic diagram of a compressed air supply means capable of increasing the discharge pressure of the etchant and removing sludge stuck to the nozzle.

As shown in FIG. 1, the glass etching spray nozzle system according to the present invention includes a fixing jig 3 for fixing the glass 1 in the glass etching spray nozzle system capable of etching the glass 1. And side injection means 5 disposed on both sides of the glass 1 fixed to the fixing jig 3 to spray the etching liquid on both sides of the glass 1, and fixed to the fixing jig 3. It consists of an upper injection means (7) which is disposed on the upper portion of the glass 1 to inject the etching liquid from the upper portion of the glass 1 to the lower portion, the fixing jig (3) fixed jig (3) A reciprocating means 9 capable of reciprocating the glass 1 fixed to the fixing jig 3 in the longitudinal direction of the fixing jig 3 is mounted by reciprocating the predetermined distance in the longitudinal direction of the fixing jig 3. do.

In addition, the side injection means 5 and the upper injection means 7 is equipped with an etching liquid supply means 11 which can supply the etching liquid to the side injection means 5 and the upper injection means 7 at a constant pressure. As shown in FIGS. 2 and 3, the etchant supply means 11 sprays the etchant storage tank 13 storing the etchant and the etchant stored in the etchant storage tank 13 at a predetermined pressure. A pump 15 which can be supplied to the means 5 or the upper injection means 7, between the side injection means 5 and the pump 15 or between the upper injection means 7 and the pump 15 A filter 17 capable of filtering impurities contained in the etchant supplied to the side injection means 5 or the upper injection means 7 via the pump 15, the side injection means 5 and the filter ( 17 or between the upper injection means 7 and the filter 17 so that the side injection means 5 Or the opening / closing valve 18 capable of supplying or blocking the etchant to the upper injection means 7 and the voltage 15 connected to the pump 15 to be supplied to the pump 15, thereby controlling the pump 15. Through the side injection means 5 or the upper injection means 7 is composed of a voltage frequency adjusting unit 19 that can adjust the pressure of the etchant.

As shown in FIG. 1, the upper injection means 7 is located above the glass 1 and is equipped with a nozzle 21a capable of injecting an etchant to one side facing the glass 1. The nozzles 21a are arranged side by side on the continuous line of the glass 1.

At this time, the nozzle 21a disposed at one side of the upper injection means 7 on the boundary of the continuous line of the glass 1 may inject the etching liquid from the upper portion of the one side of the glass 1 to the lower portion at a predetermined pressure. The nozzle 21a disposed at the other side of the upper injection means 7 on the boundary of the continuous line of the glass 1 may inject the etching liquid from the upper portion of the other side of the glass 1 to the lower portion at a predetermined pressure.

In addition, the upper injection means 7 is equipped with a left and right rotation means 23 for rotating the upper injection means 7 in the left or right direction, as shown in Figure 4 as the left and right rotation means 23 As described above, the rotary shaft 25 is connected to one end of the rotary shaft 25 to penetrate the upper injection means 7 in the longitudinal direction, thereby providing a rotational force to the rotary shaft 25. It can be made of a rotary motor 27 to enable the upper injection means 7 to rotate left and right.

In addition, a reducer 29 may be mounted between the rotary shaft 25 and the rotary motor 27 to reduce the rotational speed of the rotary motor 27 to rotate the upper injection means 7 at a low speed. have.

Meanwhile, as shown in FIG. 5, the reciprocating means 9 can reciprocate in the longitudinal direction of the fixing jig 3 by using the power provided from the conveyor motor 31 at the lower end of the fixing jig 3. Conveyor 33 or the like can be installed, the interval range in which the fixed jig 3 is reciprocated by the reciprocating means 9 is the upper portion of the nozzle 21a mounted to the upper injection means 7 It is preferable to move by the interval range between the nozzles 21a adjacent to each other in the longitudinal direction of the injection means 7.

In this way, the reciprocating means 9 capable of reciprocating the fixed jig 3 within a predetermined distance range has a part of the glass 1 facing the nozzle 21a provided in the upper injection means 7. Not to be partially etched by the etchant injected from (21a), and all the peripheral surface of the glass (1) can be uniformly etched by the etchant injected through the nozzle (21a).

Meanwhile, as shown in FIG. 1, the side injection means 5 includes a common pipe 35 capable of receiving an etchant from the etchant supply means 11, and the glass 1 from the common pipe 35. The branch pipe 37 provided with two or more nozzles 21b which can inject an etching liquid on one side facing the glass 1 while having two or more extending side by side downward.

In addition, the common pipe 35 disposed on both sides of the glass 1 may be integrally coupled, as in the second embodiment shown in FIG. 6, and the upper injection means 7 and the side injection means ( 5) may be composed of two or more, two or more etching solution supply means 11 may be mounted to the common pipe 35 and the upper injection means 7 provided in the side injection means (5).

The side injecting means 5 may be equipped with a raising and lowering means 39 capable of raising or lowering the side injecting means 5, and the raising and lowering means 39 are shown in FIGS. Referring to the following with reference to 8.

The lifting and lowering means 39 is, as in the first embodiment shown in FIG. 7, by the pneumatic or hydraulic pressure in the longitudinal direction of the branch pipe 37 to the common pipe 35 provided in the side injection means 5. It is possible to use a height adjustment cylinder 41 that can be extended or shortened in length.

In addition, the lifting and lowering means 39 is installed in a section away from the side injection means 5 by a predetermined height, as in the second embodiment shown in FIG. 43 and disposed on both sides of the lifting and lowering motor 43, can be rotated by receiving a rotational force transmitted from the lifting and lowering motor 43, and the side injection means 5 and the connecting members 45a and 45b. It may be made of a direction change pulley (47a, 47b) that can be connected via a) to raise or lower the side injection means (5) by using the rotational force generated by the motor 43.

In addition, a connection connected to the direction change pulleys 47a and 47b when the motor 43 is rotated between the direction change pulley 47a provided on one side of the lift / lower motor 43 and the lift / lower motor 43. It is preferable that the reverse gear 49 which can change the rotation direction of the raising / lowering motor 43 so that the members 45a and 45b can raise or lower at the same time is preferable.

On the other hand, the height interval at which the side injection means 5 can be raised or lowered according to the first or second embodiment of the elevating means 39 is mounted on the branch pipe 37 and at the same time adjacent nozzles. It is preferable to move by the interval range between 21b so that one side of the glass 1 facing the nozzle 21b to which the etchant is injected is not partially etched by the nozzle 21b which is always facing. .

In addition, as shown in FIG. 9, the etching liquid supply means 11 blows air of a predetermined pressure into the etching liquid flowing into the upper injection means 7 or the side injection means 5 via the pump 15, The pressure of the etching liquid injected through the upper injection means 7 or the side injection means 5 is increased, or air of a predetermined pressure is applied to the upper injection means 7 or the side injection means 5 while the etching liquid is not injected. Compressed air supply means 51 which can blow in and remove the sludge fixed to the nozzles 21a and 21b of the upper dispersing means 7 or the side distributing means 5 may be mounted.

The compressed air supply means 51 is an air compressor 53 capable of compressing air at a constant pressure, and the opening and closing to selectively supply air having a predetermined pressure to the passage through which the etching liquid flows through the air compressor 53. The valve 55, and the air pipe 57 may be delivered to the passage flow through the opening and closing valve 55 to the passage through which the etching liquid flows.

In addition, between the air compressor 53 provided in the compressed air supply means 51 and the on-off valve 55b, an air dryer 59 capable of drying air emitted from the air compressor 53, and the An air filter 61 capable of filtering impurities contained in the air blown out through the air dryer 59, and an air pressure for controlling the pressure of the air blown out through the air filter 61 to a specific range; The regulator 63 may be additionally mounted.

On the other hand, the air discharged through the opening and closing valve 55 may be inserted into the passage through which the etchant flows through the air pipe 57, one end of the air pipe 57 connected to the passage through which the etchant flows It is preferable to bend in the direction in which the etchant flows inside this flowing passage.

The air blown out through the air pipe 57 may increase the injection pressure of the etchant, and the sludge is fixed in the state in which the etchant introduced into the upper injection means 7 and the side injection means 5 is blocked. Sludge fixed to the nozzles 21a and 21b may be removed by spraying air having a predetermined pressure to the 21a and 21b.

In addition, between the on-off valve 55 provided in the compressed air supply means 51 and the air pipe 57, the back flow prevention valve 67 prevents the etchant from flowing in the direction of the air pipe 57 from the passage through which the etchant flows. Is preferably mounted.

The process of operating the glass etching spray nozzle system according to the present invention having the above structure will be described with reference to FIGS. 1 to 9 as follows.

First, when the fixing jig 3 on which the glass 1 is mounted is loaded into the upper injection means 7 and the side injection means 5, the etching liquid supply means 11 is a pump provided in the etching liquid supply means 11. The etching liquid stored in the etching liquid storage tank 13 is supplied to the upper injection means 7 and the side injection means 5 using (15).

In this case, the voltage frequency controller 19 connected to the pump 15 may adjust the injection pressure of the etchant by adjusting the frequency of the voltage supplied to the pump 15.

On the other hand, the upper injection means 7 and the side injection means 5 received the etching liquid of a predetermined pressure by the etching liquid supply means 11 is inserted into the upper injection means 7 and the side injection means (5) Etching solution can be sprayed on 1).

In addition, the upper injection means 7 is to spray the etching liquid in the glass (1) direction, at the same time rotated left and right by the left and right rotating means 23 to alternately etch both sides of the glass (1). The side dispensing means 5 sprays the etchant in the direction of the glass 1 and is moved by the elevating means 39 in the height direction of the glass 1 so that the circumferential surface of the glass 1 is increased. Can be etched uniformly.

Further, the reciprocating means 9 reciprocates the fixing jig 3 in the longitudinal direction of the fixing jig 3 by a predetermined interval, so that the glass 1 mounted on the fixing jig 3 is a side injection means ( 5) and the upper injection means (7) to be uniformly etched.

On the other hand, the compressed air supply means 51 provided in the present invention is operated at the same time as the etching liquid supply means 11 of the etching liquid discharged to the glass 1 through the upper injection means 7 and the side injection means (5) The injection pressure may be increased, the operation of the etching liquid supply means 11 may be stopped, and then the compressed air supply means 51 may be operated to remove sludge fixed to the nozzle 21 using pneumatic pressure. .

The spray nozzle system for glass etching according to the present invention having such a structure injects the etching liquid to both sides and the upper portion of the glass 1 loaded by the side injection means 5 and the upper injection means 7 through the fixing jig (3). The pressure of the etchant injected through the nozzle 21 may be variously changed through the voltage frequency adjusting unit 19.

In addition, by mounting a compressed air supply means 51 for supplying a predetermined pressure air in the passage through which the etching liquid flows it can increase the injection pressure of the etching liquid injected through the nozzles (21a, 21b).

In addition, the compressed air supplying means 51 stops the operation of the etching liquid supplying means 11 and then injects only the pure air excluding the etching liquid to the nozzles 21a and 21b from which the etching liquid is ejected, and thus the nozzle 21a. It is possible to effectively remove the sludge fixed at 21b).

Therefore, the spray nozzle system for glass etching according to the present invention can effectively etch the surface of the glass by using the side injection means 5 and the voltage frequency adjusting unit 19 that can adjust the injection pressure of the etching liquid, the side portion The operation of the upper injection means 7 together with the operation of the injection means 5 has the effect of maintaining the thickness of the glass uniformly.

In addition, since the sludge solidified on the nozzles 21a and 21b can be effectively removed using compressed air, the spray path of the etchant injected through the nozzles 21a and 21b can be fixed constantly, and the nozzle ( Due to the sludge fixed to 21a, 21b) there is an effect that the injection pressure of the etchant is not lowered.

The present invention described above is not limited to the above-described embodiments and drawings because various substitutions, modifications, and changes can be made by those skilled in the art without departing from the technical spirit of the present invention.

1 is a perspective view of a first embodiment of a spray nozzle system for glass etching according to the present invention;

2 and 3 is a flow diagram until the etching liquid capable of etching the glass is injected into the glass through the spray nozzle,

Figure 4 is a perspective view of the left, right rotation means capable of rotating the left and right upper injection means provided in the present invention,

5 shows a first embodiment of a reciprocating means capable of reciprocating a fixed jig in a linear direction,

6 is a perspective view of a second embodiment of the spray nozzle system for glass etching according to the present invention;

7 and 8 are the first and second embodiments of the lifting and lowering means capable of raising or lowering the side injection means provided in the present invention;

9 is a schematic diagram of a compressed air supply means capable of increasing the discharge pressure of the etchant and removing sludge stuck to the nozzle.

Description of the Related Art [0002]

1.glass 3.fixing jig

5. Side injection means 7. Upper injection means

9. Reciprocating means 11. Etching liquid supply means

13. Etch solution storage tank 15. Pump

17. Filter 19. Voltage frequency control

21. Nozzle 23. Left and right rotating means

25. Rotating shaft 27. Motor

29. Reduction gear 31. Power generating means

33. Conveyor 35. Shared pipe

37. Branch pipe 39. Means for getting on and off

41. Height adjustment cylinder 43. Motor

45. Connecting member 47. Directional pulley

49. Reverse gear 51. Compressed air supply means

53. Air compressor 55. Opening and closing valve

57.Air pipe 59.Air dryer

61. Air filter 63. Air pressure regulator

65. Etching liquid supply pipe 67. Valve for preventing backflow

Claims (12)

In the spray nozzle apparatus for glass etching which can etch the glass 1, A fixing jig 3 capable of fixing the glass 1; Side spraying means (5) disposed on both sides of the glass (1) and capable of injecting an etchant to both sides of the glass (1); It is made of an upper injection means (7) which is disposed on the upper portion of the glass (1) fixed to the fixing jig (3) to inject the etching liquid from the upper portion of the glass (1), The fixing jig 3 is reciprocated in the longitudinal direction of the fixing jig 3 to reciprocate the glass 1 fixed to the fixing jig 3 in the longitudinal direction of the fixing jig 3. A reciprocating means 9 capable of moving is mounted, The side injection means 5 and the upper injection means 7 is equipped with an etching liquid supply means 11 which can supply the etching liquid to the side injection means 5 and the upper injection means 7 at a constant pressure, The reciprocating means 9 is installed at the lower end of the fixed jig 3, a conveyor 33 capable of reciprocating in the longitudinal direction of the fixed jig 3 by using the power provided from the conveyor motor 31, The interval range in which the fixed jig 3 is reciprocated by the reciprocating means 9 is adjacent to each other in the longitudinal direction of the upper injecting means 7 among the nozzles 21a mounted on the upper injecting means 7. Range between) The etchant supply means 11 includes an etchant storage tank 13 for storing the etchant; A pump 15 capable of supplying the etchant stored in the etchant storage tank 13 to the side injection means 5 or the upper injection means 7 at a predetermined pressure; It is mounted between the side injecting means 5 and the pump 15 or between the upper injecting means 7 and the pump 15 and is supplied to the side injecting means 5 or the upper injecting means 7 via the pump 15. A filter 17 capable of filtering impurities 17 in the etchant to be formed; It is mounted between the side injection means 5 and the filter 17 or between the upper injection means 7 and the filter 17 to supply or block the etchant to the side injection means 5 or the upper injection means 7. Open / close valve 18; And controlling the pressure of the etchant supplied to the side injection means 5 or the upper injection means 7 through the pump 15 by adjusting the voltage frequency supplied to the pump 15 in connection with the pump 15. Consists of a voltage frequency control unit 19, The upper injection means 7 is located above the glass 1 and at the same time, a nozzle 21a capable of injecting an etchant on the one side facing the glass 1 is mounted, and the nozzle 21a is It is arranged side by side on the continuous line of the glass (1), The side injection means (5) and the common pipe (35) which can be supplied with the etching liquid from the etching liquid supply means (11); Two or more nozzles 21b which are capable of spraying an etchant on one side facing the glass 1 while being at least two side by side extending from the common pipe 35 to the lower side of the glass 1 are mounted. Consists of branch pipes (37), The common pipes 35 disposed on both sides of the glass 1 may be integrally coupled, and the upper injection means 7 and the side injection means 5 may be formed of two or more, and the side parts Two or more etching liquid supply means 11 are mounted to the common pipe 35 and the upper injection means 7 provided in the injection means 5, The upper injection means 7 is equipped with a left and right rotation means 23 for rotating the upper injection means 7 in the left or right direction, The left and right rotating means 23 is connected to one end of the rotary shaft 25 and the rotary shaft 25 that can penetrate the upper injection means 7 in the longitudinal direction, thereby providing a rotational force to the rotary shaft 25, It consists of a rotary motor 27 to enable the rotary shaft 25 to rotate the upper injection means 7 to the left and right, Between the rotary shaft 25 and the rotary motor 27 is equipped with a reducer 29 that can rotate the upper injection means 7 at a low speed by reducing the rotational speed of the rotary motor 27, The side injection means 5 is equipped with a lifting means 39 for raising or lowering the side injection means 5, The raising and lowering means 39 is disposed on both sides of the raising and lowering motor 43 capable of generating a rotational force from the side injection means 5 and the raising and lowering motor 43, and the raising and lowering motor 43 is provided. The side injection means 5 may be rotated by receiving a rotation force transmitted from the side injection means 5 and connected through the side injection means 5 and the connecting members 45a and 45b to use the rotational force generated by the motor 43. ) Is made of a turning pulley (47a, 47b) that can raise or lower), The connecting member connected to the direction change pulleys 47a and 47b when the motor 43 rotates between the direction change pulley 47a provided at one side of the lift motor 43 and the lift motor 43. It is equipped with a reverse gear 49 that can change the rotational direction of the up and down motor 43 so that 45a, 45b can be raised or lowered at the same time, The height interval at which the side injection means 5 is raised or lowered by the raising and lowering means 39 is a gap between the nozzles 21b adjacent to each other while being mounted to the branch pipe 37, The etching liquid supplying means 11 blows air of a predetermined pressure into the etching liquid flowing into the upper spraying means 7 or the side spraying means 5 via the pump 15, and the upper spraying means 7 or the side spraying means. Increasing the pressure of the etching liquid injected through (5) or by blowing air of a predetermined pressure to the upper injection means 7 or the side injection means 5 in the state that the etching liquid is not discharged, the upper injection means 7 or the side Equipped with compressed air supply means 51 capable of removing the sludge adhering to the nozzle 21 of the injection means 5, The compressed air supply means (51) includes an air compressor (53) capable of compressing air at a constant pressure; An on / off valve (55) for selectively supplying air having a predetermined pressure to the passage through which the etching liquid flows through the air compressor (53); And an air pipe 57 capable of delivering the air discharged through the open / close valve 55 to the etchant supply pipe 65. The compressed air supply means (51) includes an air dryer (59) capable of drying the air emitted from the air compressor (53); An air filter 61 capable of filtering impurities contained in the air blown out through the air dryer 59; An air pressure regulator (63) capable of adjusting a pressure of air emitted through the air filter (61) to a specific range; And a backflow prevention valve 67 mounted between the on / off valve 55 and the air pipe 57 to prevent the backflow of the etchant from the passage through which the etchant flows. Spray nozzle device for etching. delete delete delete delete delete delete delete delete delete delete delete

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