JP2009101285A - Liquid application apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid application apparatus for evenly applying a liquid without unevenness to the surface of an object material to be coated. <P>SOLUTION: The liquid application apparatus includes an application housing 6 having a sending-in port and a sending-out port and defining an application space 4 in the inside, liquid spraying means 42 for spraying a liquid to the application space 4, and liquid supplying means 44 for supplying the liquid to the liquid spraying means 42. In the application housing 6, the liquid spraying means 42 is installed in one side of the center part in the up and down directions of a transportation route 38 in which the object material to be coated 40 is transported. The object material to be coated 40 is sent in the application space 4 through the sending-in port of the application housing 6 and sent out through the sending-out port of the application housing 6 and the liquid spraying means 42 sprays the liquid in a manner that the liquid adheres to both faces of the object material to be coated 40 transported in the application space 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid application apparatus for applying a liquid such as a processing liquid to the surface of a material to be applied.

  2. Description of the Related Art Conventionally, a liquid application device for applying a liquid to the surface of a material to be coated is known. For example, when a material to be coated is pressed using a press device, the liquid coating device is used to perform liquid processing. Is applied to the surface of the material to be coated (see, for example, Patent Document 1). This liquid coating apparatus has a feeding port and a feeding port, and defines a coating housing that defines a coating space inside, an outer space that defines an outer space outside the coating housing, and an outer feeding port corresponding to the feeding port, An outer housing having an outer delivery port corresponding to the delivery port, a spray nozzle for spraying the processing liquid into the application space, a liquid supply means for supplying the processing liquid to the spray nozzle, and a supply from the application space And a suction collection means for sucking and collecting the mist-like machining liquid leaked into the outer space through the inlet and the outlet.

  The liquid supply means includes a liquid tank for storing the processing liquid, a liquid circulation means for circulating the processing liquid stored in the liquid tank through the coating space and the outer space, a compressor for supplying compressed air, and a compressor A compressed air feed line for feeding compressed air from the spray nozzle to the spray nozzle. The suction recovery means is recovered in the recovery space, a recovery space for recovering the mist-like machining fluid leaked to the outer space, a compressed air branch line for supplying compressed air from the compressor to the recovery space, and the recovery space. A gas-liquid separation filter for separating the mist-like machining liquid into air and machining liquid, and a liquid recovery line for returning the machining liquid separated by the gas-liquid separation filter to the liquid tank.

  The spray nozzles are respectively disposed on both sides of a moving path through which the material to be coated is moved. The spray nozzle on one side of the movement path is arranged above the movement path, and the spray nozzle on the other side of the movement path is arranged below the movement path. The working fluid stored in the liquid tank is sucked and fed using the compressed air from the compressor, and the compressed air and the working fluid are mixed and sprayed from the spray nozzle.

  The processing liquid application by the liquid application apparatus described above will be described as follows. The material to be coated is fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and is fed out through the feeding port of the coating housing and the outer feeding port of the outer housing. While the material to be applied moves through the application space, the mist-like processing liquid filled in the application space adheres to the surface of the material to be applied, and thereby the liquid is applied to the surface of the material to be applied. Further, the atomized machining fluid leaked to the outer space using the flow of compressed air from the compressor is collected in the recovery space, and this collected atomized machining fluid is separated into air and machining fluid by the gas-liquid separation filter. To be separated. The separated air is discharged to the outside, and the separated working fluid is returned to the liquid tank through the liquid recovery line.

JP 2003-265987 A

  However, the above-described conventional liquid coating apparatus has the following problems. First, since the processing liquid is applied by the mist-like processing liquid filled in the application space adhering to the surface of the material to be applied, if the surface roughness of the material to be applied is fine, There is a problem that the processing liquid is difficult to adhere uniformly and uniformly on the surface of the coating material. Second, when the viscosity of the working fluid is large, the working fluid stored in the liquid tank is difficult to be sucked and fed, and therefore the amount of the working fluid mixed with the compressed air at the spray nozzle is reduced, There is a problem that the working fluid cannot be sprayed efficiently. Thirdly, the air separated by the gas-liquid separation filter may contain a mist-like machining fluid, and in such a case, if this air is discharged to the outside, the machining fluid recovery efficiency decreases. There's a problem.

A first object of the present invention is to provide a liquid coating apparatus capable of uniformly and uniformly applying a liquid to the surface of a material to be coated.
The second object of the present invention is to provide a liquid coating apparatus capable of efficiently spraying a liquid.

  Furthermore, a third object of the present invention is to provide a liquid coating apparatus capable of increasing the liquid recovery efficiency.

In the liquid coating apparatus according to claim 1 of the present invention, a coating housing having a feeding port and a feeding port and defining a coating space therein, and a liquid spraying means for spraying a liquid into the coating space And a liquid supply device for supplying a liquid to the liquid spray device,
In the application housing, the liquid spraying means is disposed on one side of the central portion in the vertical direction of the movement path through which the material to be coated is moved,
The material to be coated is fed into the coating space through the feeding port of the coating housing, is fed out through the feeding port of the coating housing, and the liquid spraying means is moved through the coating space. It is characterized by spraying a liquid so as to adhere to both surfaces of the material.

Moreover, in the liquid coating apparatus according to claim 2 of the present invention, an outer space for defining at least the feeding port and the feeding port of the coating housing to cover the feeding port and corresponding to the feeding port is provided. An outer housing having an outlet and an outer delivery port corresponding to the delivery port; and for sucking and collecting the mist-like liquid leaking from the application space to the outer space through the delivery port and the delivery port A suction recovery means,
The material to be coated is fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and through the feeding port of the coating housing and the outer feeding port of the outer housing. It is sent out to the outside.

Furthermore, in the liquid coating apparatus according to claim 3 of the present invention, the coating housing includes a feeding port and a feeding port, and defines a coating space therein, and at least the feeding port and the feeding of the coating housing. An outer space for covering the mouth is defined, an outer housing having an outer feeding port corresponding to the feeding port and an outer feeding port corresponding to the feeding port, and a liquid is sprayed into the application space A liquid spraying means for supplying liquid to the liquid spraying means, and a mist-like liquid leaked from the application space to the outer space through the inlet and the outlet. Suction recovery means for recovering, and the material to be coated is fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, The liquid sprayed from the liquid spraying means adheres to the surface of the material to be coated while it is fed to the outside through the delivery port of the ging and the external delivery port of the outer housing and is moved through the application space. In a liquid spray device,
The liquid supply means includes: a liquid supply source for storing liquid; a liquid circulation means for circulating the liquid stored in the liquid supply source through the application space and the outer space; and for supplying compressed air. A compressed air supply source; and a compressed air supply line for supplying the compressed air from the compressed air supply source to the liquid spraying means, and the liquid circulation means supplies the liquid from the liquid supply source. A liquid supply line for supplying the liquid spraying means, a liquid storing means for storing the liquid collected from the coating space and the outer space, and a liquid supply for storing the liquid stored in the liquid storing means. A liquid return line for returning to the source, the liquid supply source being disposed above the liquid spraying means,
Utilizing the flow of compressed air from the compressed air supply source and the height difference between the liquid supply source and the liquid spray means, the liquid stored in the liquid supply source is sucked and fed through the liquid feed line. The compressed air and the liquid are mixed and sprayed from the liquid spraying means.

In the liquid coating apparatus according to claim 4 of the present invention, the coating housing has a feeding port and a feeding port, and defines a coating space therein, and at least the feeding port and the feeding of the coating housing. An outer space for covering the mouth is defined, an outer housing having an outer feeding port corresponding to the feeding port and an outer feeding port corresponding to the feeding port, and a liquid is sprayed into the application space A liquid spraying means for supplying liquid to the liquid spraying means, and a mist-like liquid leaked from the application space to the outer space through the inlet and the outlet. And a suction collection means for collecting, and the material to be coated is fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and the coating housing The liquid sprayed from the liquid spraying means adheres to the surface of the material to be coated while being transported to the outside through the delivery port of the ring and the external delivery port of the outer housing and moved through the coating space. In a liquid spray device,
The suction recovery means includes a recovery space for recovering the mist liquid leaked into the outer space, a compressed air supply source for supplying compressed air, and compressed air from the compressed air supply source in the recovery space. Compressed air supply line for supplying to the liquid, first gas-liquid separation means for separating the mist liquid collected in the collection space into air and liquid, and separation by the first gas-liquid separation means A first liquid recovery line for returning the liquid to the liquid supply means; a second gas-liquid separation means for further separating the air separated by the first gas-liquid separation means into air and liquid; A second liquid recovery line for returning the liquid separated by the second gas-liquid separation means to the liquid supply means, wherein the first gas-liquid separation means comprises a gas-liquid separation filter, and 2 Gas-liquid separation means is a gas-liquid separation box It is al configuration,
Using the flow of compressed air from the compressed air supply source, the atomized liquid leaked into the outer space is sucked and collected in the recovery space, and the air separated by the gas-liquid separation filter is the gas-liquid separation box The liquid contained in the air is sprayed onto the wall surface of the gas and the liquid is attached to the wall surface of the gas-liquid separation box, whereby the air and the liquid are separated.

  According to the liquid application apparatus of the first aspect of the present invention, since the liquid spraying means is disposed on one side of the central portion in the vertical direction of the movement path through which the material to be coated is moved, The liquid is sprayed from the lateral direction of the material to be applied moved through the space. The liquid sprayed from the liquid spraying means is diffused in the application space in the form of a mist, and is directly sprayed on both surfaces of the material to be applied, so that the mist-like liquid filled in the application space is covered. In addition to being attached to both surfaces of the coating material, the liquid sprayed from the liquid spraying means is directly adhered to both surfaces of the material to be coated. Therefore, even when the surface roughness of the material to be coated is fine, the liquid can be uniformly applied to both surfaces of the material to be coated without unevenness.

  Moreover, according to the liquid coating apparatus of the second aspect of the present invention, the outer housing that defines the outer space for covering the feeding port and the feeding port of the coating housing is provided, and the leaked mist is Since the suction recovery means for recovering the liquid is provided, the mist liquid leaking from the application space through the feeding port and the delivery port flows into the outer space and is sucked and recovered by the suction recovery means through the outer space. Therefore, it is possible to prevent the mist-like liquid in the coating space from leaking to the outside, and the surrounding environment can be kept clean.

  Furthermore, according to the liquid application apparatus according to claim 3 of the present invention, since the liquid supply source is disposed above the liquid spraying means, in addition to the flow of compressed air from the compressed air supply source, By utilizing the difference in height between the supply source and the liquid spraying means, the liquid stored in the liquid supply source is efficiently sucked and fed through the liquid feed line. Accordingly, even a liquid having a high viscosity can be efficiently sprayed by the liquid spraying means.

  Further, according to the liquid application apparatus of the fourth aspect of the present invention, the suction recovery means includes a gas-liquid separation box for further separating the air separated by the gas-liquid separation filter into air and liquid. Therefore, the mist liquid contained in the air separated by the gas-liquid separation filter can be recovered, and the liquid recovery efficiency can be increased. Further, air separated by the gas-liquid separation filter is blown onto the wall surface of the gas-liquid separation box, and the mist-like liquid contained in the air adheres to the wall surface of the gas-liquid separation box, thereby separating the air and the liquid. Therefore, even if the amount of the mist liquid contained in the air separated by the gas-liquid separation filter is very small, the mist liquid can be reliably recovered.

  Hereinafter, an embodiment of a liquid coating apparatus according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view showing a liquid coating apparatus according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the liquid coating apparatus taken along line AA in FIG. 1, and FIG. 1 is a schematic cross-sectional view of a liquid application device taken along line BB in FIG.

  1 to 3, the illustrated liquid application device 2 includes an application housing 6 that defines an application space 4. The application housing 6 covers a substantially rectangular bottom wall 8, side walls 10, 12, 14, and 16 extending upward from the outer periphery of the bottom wall 8, and an upper portion of a space surrounded by the side walls 10 to 16. The application space 4 is defined by the bottom wall 8, the side walls 10-16, and the top wall 18. A laterally long inlet 20 is provided on one side wall 10 of the coating housing, and a laterally long outlet 22 is provided on the other side wall 14 facing the one side wall 10.

  An outer housing 24 is provided outside the application housing 6. The outer housing 24 includes an outer wall 26 disposed outside one side wall 10 of the application housing 6, an outer wall 28 disposed outside the other side wall 14 of the application housing 6, and a bottom wall 8 of the application housing 6. And an outer bottom wall 30 disposed on the lower side. The side walls 12, 16 and the top wall 18 of the application housing 6 protrude outward beyond the side walls 10, 14, and the side walls 12, 16 and the top wall 18 are connected to the outer walls 26, 28 of the outer housing 24. Accordingly, the outer housing 24 defines an outer space 32 outside the application housing 6, and the outer space 32 passes from the outer side of the one side wall 10 of the application housing 6 to the lower side of the bottom wall 8 and on the other side wall 14. It extends to the outside and is provided so as to cover the inlet 20 and the outlet 22 of the application housing 6 (see FIGS. 2 and 3).

  The outer wall 26 of the outer housing 24 is provided with a horizontally long outer inlet 34 corresponding to the inlet 20 provided on the one side wall 10 of the application housing 6, and the outer wall 28 has an application Corresponding to the delivery port 22 provided on the other side wall 14 of the housing 6, a horizontally long outside delivery port 36 is provided. The outer feeding port 34 and the outer feeding port 36 of the outer housing 24 and the feeding port 20 and the feeding port 22 of the application housing 6 define a moving path 38 extending in a predetermined direction. The plate-like or sheet-like material to be coated 40 is moved in the direction indicated by the arrow P in FIG. 3 through this movement path 38, and is applied through the outer feeding port 34 of the outer housing 24 and the feeding port 20 of the coating housing 6. After being fed into the space 4 and passing through the coating space 4, it is fed out through the feed port 22 of the coating housing 6 and the outer feed port 36 of the outer housing 24.

  For example, a spray nozzle 42 (which constitutes a liquid spraying means) for spraying a liquid such as a processing liquid is attached to the side wall 12 of the application housing 6. The spray nozzle 42 is disposed on one side of the central portion in the vertical direction of the movement path 38 of the material to be coated 40, and the liquid from the liquid supply unit 44 is supplied to the spray nozzle 42. The liquid supply means 44 includes a liquid supply tank 46 (which constitutes a liquid supply source) for storing liquid, and a liquid circulation for circulating the liquid stored in the liquid supply tank 46 through the coating space 4 and the outer space 32. Means 48, a compressor 50 for supplying compressed air (constituting a compressed air supply source), a first compressed air supply line 52 for supplying compressed air from the compressor 50 to the spray nozzle 42, It has. The liquid supply tank 46 is disposed above the spray nozzle 42.

  The liquid circulation means 48 also has a liquid supply line 54 for supplying the liquid from the liquid supply tank 46 to the spray nozzle 42, and a liquid recovery for storing the liquid recovered from the coating space 4 and the outer space 32. A tank 56 (which constitutes a liquid reservoir), a liquid return line 58 for returning the liquid stored in the liquid recovery tank 56 to the liquid supply tank 46, a circulation pump 60 disposed in the liquid return line 58, have. One end of the liquid supply line 54 is connected to the bottom of the liquid supply tank 46, and the other end is connected to the spray nozzle 42. In this embodiment, the liquid supply line 54 is the bottom of the liquid supply tank 46. After extending downward, it is bent and extended in the horizontal direction, and further bent upward and extends to the spray nozzle 42.

  With this configuration, when the compressor 50 is operated, the compressed air from the compressor 50 is supplied to the spray nozzle 42 through the first compressed air supply line 52, and the compressed air is used to generate the inside of the spray nozzle 42. The suction action comes to work. Further, the liquid in the liquid supply tank 46 flows down through the liquid supply line 54 due to its gravity, and flows into the spray nozzle 42 with the momentum when the liquid flows down. Accordingly, the liquid is sucked using the suction force of the compressed air flowing in the spray nozzle 42 and the height difference between the liquid supply tank 46 and the spray nozzle 42, and thereby the liquid stored in the liquid supply tank 46 is liquid. The liquid can be efficiently sprayed by the spray nozzle 42 even when the liquid is sucked and fed to the spray nozzle 42 through the feed line 54 and the viscosity of the liquid is large. The compressed air and the liquid fed to the spray nozzle 42 are mixed inside the spray nozzle 42 and are sprayed from the spray nozzle 42 into the application space 4.

  In such a liquid application device 2, the mist liquid in the application space 4 leaks to the outer space 32 through the inlet 20 and the outlet 22 of the application housing 6, but the mist liquid leaked to the outer space 32. Is sucked and collected by the suction collecting means 62. The suction recovery means 62 includes a cylindrical member 66 that defines a recovery space 64, a second compressed air supply line 67 for supplying compressed air from the compressor 50 into the cylindrical member 66, and a cylindrical member The first gas-liquid separation means 68 for separating the mist liquid collected in 66 into air and liquid, and the first gas-liquid separation means 68 for returning the liquid separated by the first gas-liquid separation means 68 to the liquid collection tank 56. 1 liquid recovery line 70, 2nd gas-liquid separation means 72 for further separating the air separated by the first gas-liquid separation means 68 into air and liquid, and the second gas-liquid separation means 72 And a second liquid recovery line 74 for returning the liquid to the liquid recovery tank 56.

  The first gas-liquid separation means 68 is composed of a gas-liquid separation filter 76, and this gas-liquid separation filter 76 is provided at one end of the cylindrical member 66. An exhaust pipe 78 extending to the outside is provided at one side of the gas-liquid separation filter 76, and one end of the first liquid recovery line 70 is connected to the bottom thereof. The second gas-liquid separation means 72 includes a gas-liquid separation box 80, and an opening 82 is provided on one side wall of the gas-liquid separation box 80, and an exhaust pipe 78 of the gas-liquid separation filter 76 is formed in the opening. The gas-liquid separation box 80 extends through the portion 82. Further, a drainage hole 84 is provided in the bottom wall 83 of the gas-liquid separation box 80, and one end of the second liquid recovery line 74 is connected to the drainage hole 84. The other ends of the first and second liquid recovery lines 70 and 74 are connected to the liquid recovery tank 56.

  A connecting pipe 86 is connected to the other end of the cylindrical member 66, and the connecting pipe 86 and the compressor 50 are connected to each other via a second compressed air supply line 67. The compressed air is fed into the cylindrical member 66 through the second compressed air feed line 67 and the connecting pipe 86. Most of the connecting pipe 86 and the cylindrical member 66 are disposed at the bottom of the outer space 32 (specifically, the space between the bottom wall 8 of the application housing 6 and the outer bottom wall 30 of the outer housing 24). The second compressed air supply line 67 is connected to one end portion of the connecting pipe 86 protruding outward from the side wall 12, and the gas-liquid separation filter 76 is connected to one end portion of the cylindrical member 66 protruding outward from the side wall 16. It is attached. Further, the cylindrical member 66 is provided with a suction port 88. When the compressed air from the compressor 50 flows in the cylindrical member 66 through the second compressed air supply line 67 and the connecting pipe 86, the compressed air is compressed. A suction action is configured to act on the outer space 32 through the suction port 88 using the flow.

  Further, a drain hole 90 is provided in the bottom wall 8 of the coating housing 6, and one end portion of a third liquid recovery line 92 is connected to the drain hole 90. Further, a drainage hole 94 is provided in the outer bottom wall 30 of the outer housing 24, and one end of a fourth liquid recovery line 96 is connected to the drainage hole 94. The other ends of the third and fourth liquid recovery lines 92 and 96 are connected to the liquid recovery tank 56.

  In the present embodiment, the top wall 18 of the application housing 6 is inclined on both sides. The top wall 18 has the highest central portion in the width direction (left-right direction in FIG. 1) of the material to be coated 40 moved along the movement path 38, and linearly downwards from the central portion in the width direction toward both sides. It extends at an angle. By inclining the top wall 18 in this way, the liquid adhering to the top wall 18 flows toward the side walls 12 and 16 along the inclined surface of the top wall 18, and flows down along the side walls 12 and 16. The liquid is recovered into the liquid recovery tank 56 through the drain hole 90 of the wall 8 and the third liquid recovery line 92. Therefore, the liquid adhering to the top wall 18 does not drip onto the surface of the material to be applied 40 that moves along the movement path 38, and as a result, the liquid can be applied substantially uniformly as will be described later. Instead of such a configuration, the top wall 18 may be configured to be inclined downward from one end in the width direction toward the other end.

  A method for applying a liquid to the surface of the material to be applied 40 using the liquid applying apparatus 2 described above will be described as follows. When the compressor 50 is operated, the compressed air from the compressor 50 is supplied to the spray nozzle 42 through the first compressed air supply line 52, and in the cylindrical member 66 through the second compressed air supply line 67 and the connection pipe 86. To be sent to.

  When the compressed air is supplied to the spray nozzle 42, the liquid in the liquid supply tank 46 is supplied to the liquid supply line 54 by the suction action by the flow of the compressed air and the difference in height between the spray nozzle 42 and the liquid supply tank 46. Through the suction nozzle 42, the compressed air and liquid are mixed and sprayed from the spray nozzle 42. Therefore, when the material to be coated 40 is fed into the coating space 4 through the outer feeding port 34 of the outer housing 24 and the feeding port 20 of the coating housing 6, and moves through the coating space 4, the spray nozzle 42 moves along the movement path 38. The liquid is sprayed from both the lateral direction toward both surfaces of the material to be coated 40. The liquid sprayed from the spray nozzle 42 is sprayed into the application space 4 and diffused and flows in the form of a mist, whereby the inside of the application space 4 is substantially uniformly filled with the mist liquid and Directly sprayed on both sides. Therefore, the mist liquid filled in the coating space 4 is attached to both surfaces of the material to be coated 40, and the liquid sprayed from the spray nozzle 42 is directly adhered to both surfaces of the material to be coated 40. Thus, even when the surface roughness of the material to be coated 40 is fine, the liquid can be uniformly applied to both surfaces of the material to be coated 40 without unevenness.

  When a part of the mist liquid filled in the application space 4 adheres to the side walls 10-16, the adhering liquid flows down along the side walls 10-16, and the drain holes 90 of the bottom wall 8 and The liquid is recovered in the liquid recovery tank 56 through the third liquid recovery line 92. The liquid thus collected is returned to the liquid supply tank 46 through the liquid return line 58 by the action of the circulation pump 60, and is sent to the spray nozzle 42 and reused in the same manner as described above. The circulation pump 60 starts to operate when the liquid level in the liquid recovery tank 56 rises above the first set water level (or the liquid level in the liquid supply tank 46 falls below the second set water level). In addition, the operation stops when the liquid level in the liquid recovery tank 56 falls below the first set water level (or the liquid level in the liquid supply tank 46 rises above the second set water level). Is done.

  A part of the mist liquid filled in the coating space 4 is leaked to the outer space 32 through the inlet 20 and the outlet 22, and the leaked mist liquid is as follows. Collected. When the compressed air from the compressor 50 is fed into the cylindrical member 66, a suction force acts on the outer space 32 through the suction port 88 by the flow of the compressed air, and the mist liquid in the outer space 32 is discharged. The contained air is sucked into the cylindrical member 66 through the suction port 88. The air thus sucked flows into the gas-liquid separation filter 76 and is separated into air and liquid by the gas-liquid separation filter 76, and the separated liquid is recovered into the liquid recovery tank 56 through the first liquid recovery line 70. Is done. Further, the separated air is blown from the exhaust pipe 78 toward the inner wall surface of the gas-liquid separation box 80, so that the mist-like liquid contained in the air adheres to the inner wall surface of the gas-liquid separation box 80. Thus, it is separated into liquid and gas. The separated liquid flows down along the inner wall surface of the gas-liquid separation box 80 and is collected in the liquid collection tank 56 through the drain hole 84 in the bottom wall 83 and the second liquid collection line 74. Further, the separated air is discharged to the outside through the opening 82. Therefore, even if the amount of mist liquid contained in the air separated by the gas-liquid separation filter 76 is very small, the mist liquid can be reliably recovered.

  When a part of the mist liquid leaking into the outer space 32 adheres to the outer walls 26 and 28, the adhering liquid flows down along the outer walls 26 and 28, and the drain holes 94 and the outer bottom wall 30. The liquid is recovered into the liquid recovery tank 56 through the fourth liquid recovery line 96. The liquid recovered in this manner is returned to the liquid supply tank 46 through the liquid return line 58 by the action of the circulation pump 60 and is sent to the spray nozzle 42 for reuse as described above.

  When recovering the mist-like liquid leaking into the outer space 32 in this manner, the outer space 32 is maintained at a negative pressure, so that external air is supplied to the outer inlet 34 and the outer outlet 36 of the outer housing 24. Into the outer space 32. This air flow prevents the air in the outer space 32 from leaking to the outside, and therefore can reliably prevent the mist liquid in the coating space 4 from leaking to the outside.

  As mentioned above, although one embodiment of the liquid application device according to the present invention was described, the present invention is not limited to such an embodiment, and various changes and modifications can be made without departing from the scope of the present invention.

  For example, when the liquid coating apparatus 2 described above is used as a processing liquid coating apparatus for coating a processing liquid on the surface of a material to be coated 40 that is pressed by a pressing apparatus, the liquid coating apparatus 2 is provided with a height adjusting mechanism. When the height of the movement path 38 of the material to be coated 40 is adjusted by the height adjusting mechanism, the height of the liquid coating apparatus 2 may be adjusted in conjunction with the height.

It is a schematic sectional drawing which shows the liquid coating device by one Embodiment of this invention. It is a schematic sectional drawing of the liquid application apparatus by the AA line in FIG. It is a schematic sectional drawing of the liquid coating device by the BB line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Liquid coating device 4 Coating space 6 Coating housing 32 Outer space 38 Movement path 40 Material to be coated 42 Spray nozzle 44 Liquid supply means 46 Liquid supply tank 48 Liquid circulation means 50 Compressor 52 First compressed air feed line 54 Liquid feed line 56 Liquid recovery tank 58 Liquid return line 62 Suction recovery means 64 Recovery space 67 Second compressed air supply line 68 First gas-liquid separation means 72 Second gas-liquid separation means 76 Gas-liquid separation filter 80 Gas-liquid separation box

Claims (4)

An application housing having an inlet and an outlet and defining an application space therein, a liquid spraying means for spraying a liquid into the application space, and a liquid for supplying a liquid to the liquid spraying means A liquid spray apparatus comprising:
In the application housing, the liquid spraying means is disposed on one side of the central portion in the vertical direction of the movement path through which the material to be coated is moved,
The material to be coated is fed into the coating space through the feeding port of the coating housing, is fed out through the feeding port of the coating housing, and the liquid spraying means is moved through the coating space. A liquid application apparatus which sprays a liquid so as to adhere to both surfaces of a material. An outer side that defines an outer space for covering at least the delivery port and the delivery port of the application housing, and has an outer delivery port corresponding to the delivery port and an outer delivery port corresponding to the delivery port A housing, and a suction collection means for sucking and collecting the mist-like liquid leaked from the application space to the outer space through the inlet and the outlet;
The material to be coated is fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and through the feeding port of the coating housing and the outer feeding port of the outer housing. The liquid application apparatus according to claim 1, wherein the liquid application apparatus is sent out to the outside. An application housing having an inlet and an outlet and defining an application space therein; and an outer space for covering at least the inlet and the outlet of the application housing; and the inlet And an outer housing having an external delivery port corresponding to the delivery port, a liquid spraying means for spraying a liquid into the application space, and supplying the liquid to the liquid spraying means Liquid supply means for suction, and suction recovery means for sucking and collecting the mist-like liquid leaked from the application space to the outer space through the inlet and the outlet, and the material to be applied is , Being fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and the feeding port of the coating housing and the outer housing. Sent to the outside through the delivery mouth, while being moved through the coating space, the atomized liquid from the liquid spray unit in the liquid spray device attached to the surface of the coating material,
The liquid supply means includes: a liquid supply source for storing liquid; a liquid circulation means for circulating the liquid stored in the liquid supply source through the application space and the outer space; and for supplying compressed air. A compressed air supply source; and a compressed air supply line for supplying the compressed air from the compressed air supply source to the liquid spraying means, and the liquid circulation means supplies the liquid from the liquid supply source. A liquid supply line for supplying the liquid spraying means, a liquid storing means for storing the liquid collected from the coating space and the outer space, and a liquid supply for storing the liquid stored in the liquid storing means. A liquid return line for returning to the source, the liquid supply source being disposed above the liquid spraying means,
Utilizing the flow of compressed air from the compressed air supply source and the height difference between the liquid supply source and the liquid spray means, the liquid stored in the liquid supply source is sucked and fed through the liquid feed line. The liquid spraying apparatus is characterized in that compressed air and liquid are mixed and sprayed from the liquid spraying means. An application housing having an inlet and an outlet and defining an application space therein; and an outer space for covering at least the inlet and the outlet of the application housing; and the inlet And an outer housing having an external delivery port corresponding to the delivery port, a liquid spraying means for spraying a liquid into the application space, and supplying the liquid to the liquid spraying means Liquid supply means for suction, and suction recovery means for sucking and collecting the mist-like liquid leaked from the application space to the outer space through the inlet and the outlet, and the material to be applied is , Being fed into the coating space through the outer feeding port of the outer housing and the feeding port of the coating housing, and the feeding port of the coating housing and the outer housing. Sent to the outside through the delivery mouth, while being moved through the coating space, the atomized liquid from the liquid spray unit in the liquid spray device attached to the surface of the coating material,
The suction recovery means includes a recovery space for recovering the mist liquid leaked into the outer space, a compressed air supply source for supplying compressed air, and compressed air from the compressed air supply source in the recovery space. Compressed air supply line for supplying to the liquid, first gas-liquid separation means for separating the mist liquid collected in the collection space into air and liquid, and separation by the first gas-liquid separation means A first liquid recovery line for returning the liquid to the liquid supply means; a second gas-liquid separation means for further separating the air separated by the first gas-liquid separation means into air and liquid; A second liquid recovery line for returning the liquid separated by the second gas-liquid separation means to the liquid supply means, wherein the first gas-liquid separation means comprises a gas-liquid separation filter, and 2 Gas-liquid separation means is a gas-liquid separation box It is al configuration,
Using the flow of compressed air from the compressed air supply source, the atomized liquid leaked into the outer space is sucked and collected in the recovery space, and the air separated by the gas-liquid separation filter is the gas-liquid separation box The liquid coating apparatus is characterized in that air and liquid are separated by being sprayed on the wall surface of the gas and the liquid contained in the air is attached to the wall surface of the gas-liquid separation box.

Images