JP2017047386A - Masking cured film removal device, and manufacturing apparatus of etching metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a masking cured film removal device capable of reducing a load for a waste liquid treatment, and to provide a manufacturing apparatus of an etching metal plate.SOLUTION: A masking cured film removal device 60 to be constituted includes a nozzle 61 for supplying swelling liquid for swelling a cured film to a surface having the cured film of a metal plate 111 having the cured film of a masking agent, and a swelling liquid reflux device for recovering the swelling liquid supplied from the nozzle 61 and resending it to the nozzle 61. A manufacturing apparatus of an etching metal plate is constituted by arranging the masking cured film removal device 60 on a subsequent stage of etching equipment.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a masked cured film removing apparatus and an etching metal plate manufacturing apparatus.

  A metal plate having a design property due to unevenness on the surface is useful as a part of a product that requires a high-class feeling like an elevator door material. As a method for forming irregularities on the surface of the metal plate, etching using masking of the surface of the metal plate with an ultraviolet (UV) cured film is known (for example, see Patent Document 1). In the manufacturing method of the etched metal plate by the etching, for example, a cured film of a masking agent is produced on a portion of the surface of the metal plate to be protected, and the metal plate having the cured film is etched and etched. The cured film is peeled off from the metal plate. The cured film remaining on the surface of the metal plate is stripped and removed by a strong alkaline stripping solution such as an aqueous caustic soda solution (see, for example, Patent Document 2).

JP 2012-162615 A JP 2001-142231 A

  In the manufacturing method described above, the uneven portion can be formed on the surface of the metal plate with high definition. However, in the above production method, since the stripping solution has strong alkalinity, the cured film is dissolved, and the components in the masking agent may be eluted in the drained liquid after the cured film is stripped. For this reason, depending on the components from which the masking agent is eluted, a high level of drainage treatment may be required. Therefore, in the manufacturing method, it is difficult to reduce the cost of the drainage process thereafter. As described above, the manufacturing method has room for improvement from the viewpoint of production cost and from the viewpoint of reducing the burden on the environment because drainage treatment is required.

  It is an object of the present invention to provide a masked cured film removing apparatus and an etching metal plate manufacturing apparatus that can reduce the load of drainage treatment.

  By using an aqueous liquid containing benzyl alcohol as a stripping solution, the present inventors swell a cured film for masking a metal plate and strip the component in the masking agent without substantially dissolving it. The present invention was completed.

  That is, the present invention provides a swelling liquid supply device for supplying a swelling liquid for swelling the cured film to a surface of the metal plate having a cured film of a masking agent, and the swelling liquid supply apparatus. There is provided a masked cured film removing apparatus having a swelling liquid reflux apparatus for recovering the swelling liquid supplied to the surface and retransmitting it to the swelling liquid supply apparatus.

  The present invention also includes a masking device for producing a cured film of a masking agent on a portion of the surface of the metal plate to be protected, an etching device for performing an etching process on the metal plate having the cured film, There is provided a method for producing an etched metal plate, comprising the above-described masked cured film removing device for removing the cured film from the etched metal plate.

  According to the present invention, it is possible to apply to a stripping solution that swells and peels the cured film, and it is possible to substantially prevent elution of components in the cured film into the stripping solution. It is possible to reduce the load of the drainage treatment in the production of the film removal and etching metal plate.

It is a figure which shows typically the structure of the manufacturing apparatus of the etching metal plate which concerns on one embodiment of this invention. It is a figure which shows typically the structure of the masking cured film removal apparatus which concerns on one embodiment of this invention. It is a figure which shows typically the structure of the washing | cleaning apparatus in one embodiment of this invention.

  The manufacturing apparatus of the etching metal plate which concerns on this invention can be comprised by the appropriate combination of a well-known apparatus in the range with the effect demonstrated below. FIG. 1 schematically shows a configuration of an etching metal plate manufacturing apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the etching metal plate manufacturing apparatus 100 includes a metal plate transport device 10, and a pretreatment device 20, a masking device 30, and a dryer 35 along the transport direction X of the transport device 10. , An etching apparatus 40, a cleaning apparatus 50, a masked cured film removing apparatus 60, a cleaning apparatus 70, and a laminating apparatus 80.

  The conveying apparatus 10 is an apparatus for conveying a metal plate in the process direction (X direction), and is, for example, a roller table. The transport apparatus 10 includes a plurality of drive rollers 101, and the drive rollers 101 are arranged in the X direction, and each of the drive rollers 101 is arranged so that its axis is along the Y direction orthogonal to the transport direction X. The conveyance apparatus 10 should just be an apparatus which can convey a metal plate to a desired direction. Other examples of the transfer device 10 include a robot arm, a belt conveyor, a turntable, a chain conveyor, a wheel conveyor, and a ball conveyor.

  The pretreatment device 20 is a device for applying a treatment suitable for applying the masking agent to the metal plate to which the masking agent is applied. The pretreatment device 20 includes, for example, a nozzle for spraying a base treatment liquid onto a metal plate and a drying device for drying the metal plate coated with the base treatment liquid. The base treatment liquid is a solution or dispersion of a component that enhances the adhesion of the masking agent to the metal plate. For example, the inorganic alkaline cleaning liquid for degreasing, the organic alkaline cleaning liquid for degreasing, or the metal stain for dissolving and removing. It is an inorganic acidic cleaning solution.

  The masking apparatus 30 is an apparatus for producing a cured film of a masking agent on a portion to be protected on the surface of a metal plate. The masking device 30 includes a printing stage 301, a moving table 302, a conveyance roller 303, a gantry 304, an inkjet nozzle 305, and UV lamps 306 and 307.

  The printing stage 301 is a part for conveying and fixing a metal plate for applying a masking agent. The printing stage 301 is arranged in parallel with the transport apparatus 10 and has a moving table 302.

  The movement table 302 is arranged so as to be movable between the solid line portion and the broken line portion in FIG. 1 along the X direction. A plurality of air nozzles are opened in the moving table 302. The air nozzles can eject and suck air, and are regularly arranged on the moving table 302 in the X direction and the Y direction.

  The conveyance roller 303 is a driving roller for conveying the metal plate on the conveyance device 10 from the conveyance device 10 to the moving table 302 or conveying the metal plate on the movement table 302 onto the conveyance device 10.

  The gantry 304 is, for example, a gantry-type pedestal that straddles the transport device 10 and the printing stage 301 along the Y direction. The inkjet nozzle 305 is disposed on the mount 304 so as to be movable in the Y direction.

  The ink supplied to the inkjet nozzle 305 is a masking agent, and the inkjet nozzle 305 is a masking agent application device for applying the masking agent to a portion to be protected on the surface of the metal plate. The masking agent coating device corresponds to a droplet discharging device for discharging a masking agent droplet to form a masking agent coating on the surface of the metal plate.

  The UV lamps 306 and 306 are respectively attached to both sides of the inkjet nozzle 305 in the Y direction. The UV lamp 306 is configured to irradiate UV when the inkjet nozzle 305 is behind the moving direction relative to the moving table. The UV is an active energy ray that cures the coating film of the masking agent, and each of the UV lamps 306 irradiates the coating film of the masking agent on the surface of the metal plate with the active energy ray to cure the coating film. This corresponds to an active energy ray irradiation apparatus for producing a cured film.

  The UV lamp 307 is disposed on the transport device 10 on the downstream side of the transport roller 303 in the X direction so as to irradiate the metal plate transported by the transport device 10 with ultraviolet rays (UV). ing. The UV is an active energy ray that cures the coating film of the masking agent, and the UV lamp 307 is also formed by curing the coating film by irradiating the coating film of the masking agent on the surface of the metal plate with the active energy ray. It corresponds to an active energy ray irradiation apparatus for producing a film.

  The active energy ray irradiation device may be any device that irradiates active energy rays. Other examples of the active energy rays include infrared rays, visible rays, X rays, electron rays, alpha rays, beta rays, and gamma rays. Other examples of active energy ray irradiation devices include mercury lamps, low-pressure mercury lamps, various metal lamps, low-pressure and solid-state lasers, xenon flash lamps, black lights, germicidal lamps, cold cathode tubes, light-emitting diodes, and the like A laser diode is included.

  The dryer 35 is a device for removing volatile components such as moisture and solvent remaining on the masked metal plate. The dryer 35 is preferably a device capable of drying the metal plate being conveyed, and examples of the dryer include a hot air dryer, an infrared heater (far, medium or near), and an induction heating device. .

  The etching apparatus 40 is an apparatus for performing an etching process on the metal plate having the cured film. The etching apparatus 40 includes, for example, a hydrochloric acid tank for spraying a hydrochloric acid aqueous solution on the surface of the metal plate on the cured film side, and a plurality of etchings arranged in the X direction for spraying a second iron chloride aqueous solution on the surface. It has a tank, a nozzle for spraying a cleaning liquid for cleaning the etched surface of the metal plate, and a smut removing device for removing smut generated by the etching from the surface. The cleaning liquid is, for example, a liquid obtained by diluting an etching liquid 20 to 50 times.

  The hydrochloric acid aqueous solution and the ferric chloride aqueous solution are both etching solutions, and other examples of the etching solution include cupric chloride aqueous solution, sulfuric acid aqueous solution, nitric acid aqueous solution and phosphoric acid aqueous solution. The smut removing device is, for example, a rotating roll brush.

  The cleaning device 50 is a device for washing the metal plate after the etching process with water. The cleaning device 50 includes, for example, a nozzle for spraying water on the surface of the metal plate and an air knife for removing water on the surface.

  The masked cured film removing device 60 is a device for removing the cured film of the masking agent from the etched metal plate. As shown in FIG. 2, the masking cured film removing apparatus 60 is configured to collect a swelling liquid sprayed on the metal plate 111 and a nozzle 61 for spraying the swelling liquid that swells the cured film onto the metal plate 111. Swelling liquid recovery tank 62, mesh belt conveyor 63 for collecting and taking out the cured film pieces in the swelling liquid (recovered liquid) in the swelling liquid recovery tank 62 generated by the swelling of the cured film, and the swelling liquid A strainer 64 for collecting suspended matter in the collected liquid discharged from the collection tank 62, an inspection device 65 for examining the composition of the collected liquid from which the suspended matter has been removed, and a collected liquid whose composition has been examined are accommodated. Adjustment tank 66, a raw solution tank 67 for storing the stock solution of the swelling liquid to be supplied to the adjustment tank 66, and a cured film piece collection tank 68 for storing the cured film pieces collected by the mesh belt conveyor 63. Have

  The nozzle 61 is arranged so that the swelling liquid can be sprayed over the entire width direction of the metal plate 111. A plurality of nozzles 61 are arranged in the X direction so that the swelling liquid is continuously supplied to the surface of the metal plate 111 conveyed in the X direction. The nozzle 61 corresponds to a swelling liquid supply device for supplying a swelling liquid that swells the cured film to at least the surface of the metal plate having the cured film of the masking agent.

  The swelling liquid recovery tank 62 is disposed below the nozzle 61 and the driving roller 101. The planar shape of the swelling liquid recovery tank 62 is larger than the planar shape of the metal plate 111, and the width thereof is longer than the arrangement length when the nozzles 61 are viewed in plan view. The downstream end of the swelling liquid recovery tank 62 in the transport direction of the metal plate 111 is a deeper liquid pool part, and the bottom of the swelling liquid recovery tank 62 upstream of the liquid pool part is Inclined downward toward the liquid pool. Thus, the swelling liquid collection tank 62 is configured to collect the swelling liquid flowing down from the metal plate 111 and to guide the collected liquid to the liquid pool portion.

  The mesh belt conveyor 63 includes an endless mesh belt and a plurality of rollers including a driving roller that pivotally supports the mesh belt. The mesh belt conveyor 63 is bridged between the liquid pool portion and the cured film piece collection tank 68. ing. The mesh belt is made of resin or metal. The mesh size (opening) of the mesh belt can be appropriately determined from the range in which the cured film pieces can be collected, and from the viewpoint of collecting the cured film pieces and preventing clogging. It is preferable that it is 15-1.5 mesh / inch.

  The strainer 64 is connected to the swelling liquid recovery tank 62 by a pipe. One or a plurality of strainers 64 may be used. For example, the strainers 64 may be arranged independently and in parallel with the swelling liquid recovery tank 62. When the strainers 64 are arranged in parallel in this way, the other strainer 64 can be removed and washed while using one strainer 64, and the continuous suspended matter can be removed by the strainer 64.

  Each of the mesh belt conveyor 63 and the strainer 64 corresponds to a cured film piece removing device for removing the cured film piece peeled off from the metal plate 111 from the recovered swelling liquid (recovered liquid).

  The inspection device 65 is a device that can detect a change in the composition of the recovered liquid with respect to the composition of the swelling liquid. The inspection device 65 is preferably a device that can continuously detect the change in the composition. Examples of the inspection device 65 include a refractive index detector for detecting the refractive index of the recovered liquid and a hydrometer for detecting the specific gravity of the recovered liquid.

  The adjustment tank 66 has a temperature adjustment device for adjusting the temperature of the recovered liquid in the adjustment tank 66. The adjustment tank 66 preferably has a sufficient capacity to uniformly adjust the composition of the recovered liquid to be reused. The adjustment tank 66 may further include a stirring device in order to make the composition of the recovered liquid uniform, and further includes a reflux pipe that returns the recovered liquid discharged from the adjustment tank 66 to the adjustment tank 66. You may do it.

  The stock solution tank 67 contains a swelling liquid material. One or more stock solution tanks 67 may be used. The stock solution tank 67 may further include a stirring device, a temperature adjusting device, and the like as necessary.

  The inspection device 65, the adjustment tank 66, and the stock solution tank 67 constitute a swelling liquid adjustment apparatus for detecting and adjusting the composition of the recovered swelling liquid.

  The cured film piece collection tank 68 is a container for accommodating the cured film piece. The cured film piece collection tank 68 is preferably configured to be able to take out the solid content in the tank from the viewpoint of smooth continuous operation of the manufacturing apparatus.

  The adjustment tank 66 is connected to the nozzle 61 by a pipe. In addition, a valve and a pump are appropriately disposed in the pipe. Thus, each structure from the swelling liquid collection tank 62 to the adjustment tank 66, and the pipe | tube which connects the adjustment tank 66 and the nozzle 61 make the swelling liquid supplied to the surface of the said metal plate from the swelling liquid supply apparatus. A swelling liquid refluxing device for collecting and retransmitting to the swelling liquid supply device is configured.

  The cleaning device 70 is a device for cleaning the metal plate from which the cured film has been removed. As shown in FIG. 3, the cleaning device 70 includes a nozzle 71, a cleaning water recovery tank 72, a brush 73, a strainer 74, and a new water supply pipe 75.

  The nozzle 71 is disposed so that the cleaning liquid (for example, water) can be sprayed on the entire width direction of the metal plate 111. A plurality of nozzles 71 are arranged in the X direction so that the cleaning water is continuously supplied to the surface of the metal plate 111 conveyed in the X direction. The cleaning water recovery tank 72 is disposed below the nozzle 71 and the driving roller 101. The planar shape of the washing water recovery tank 72 is larger than the planar shape of the metal plate 111, and the width thereof is longer than the arrangement length when the nozzles 71 are viewed in plan view. As described above, the cleaning water recovery tank 72 is configured to recover the cleaning water flowing down from the metal plate 111.

  The brush 73 is a rotating brush that can rotate in a direction opposite to the conveying direction of the metal plate 111, and is arranged so that the hair tips abut on the etched surface (for example, the upper surface) of the metal plate 111. The brush 73 is made of resin or metal.

  The strainer 74 is connected to the cleaning liquid recovery tank 72 by a pipe and is a device for collecting the suspended matter in the recovered cleaning water. As with the strainer 64, one or a plurality of strainers 74 may be provided, and it is preferable that a plurality of strainers 74 are provided independently.

  The new water supply pipe 75 is a pipe for newly supplying cleaning water. The strainer 74 is connected to the nozzle 71 by a pipe, and the fresh water supply pipe 75 is connected to the pipe on the downstream side of the strainer 74. As described above, the cleaning device 70 is configured such that one or both of the recovered cleaning water and fresh water can be used as the cleaning liquid.

  The laminating apparatus 80 is an apparatus for attaching a film for preventing scratches to the surface of the etched metal plate that has been etched.

Next, the operation state of the etching metal plate manufacturing apparatus 100 will be described.
The metal plate is transported by the transport device 10 at a speed of, for example, 0.3 to 5.0 m / min. The metal plate is a rectangular plate having a predetermined size, for example, a length of 2 to 5 m, a width of 1 to 1.5 m, and a thickness of 0.5 to 3.0 mm. The material of the metal plate can be appropriately determined from known metals and alloys that can be etched, for example, stainless steel.

  Examples of the stainless steel include austenitic stainless steel such as SUS304 and SUS316, ferritic stainless steel such as SUS430 and SUS444, martensitic stainless steel such as SUS410 and SUS420, and precipitation strengthened stainless steel such as SUS631. Is included. The stainless steel may be work hardened by cold rolling. Other examples of the material of the metal plate include copper, carbon steel, and iron-nickel alloy.

The metal plate is transported to the pretreatment device 20 by the transport device 10 at the above speed. The surface of the metal plate that has passed through the pretreatment device 20 is to be etched (for example, the upper surface). It is dried by a drying device arranged in a downstream portion of 20. As the ground treatment liquid, a known treatment liquid according to the purpose can be used. For example, for the purpose of improving the adhesion of the masking agent, a ground treatment liquid having the following composition is used. The drying temperature in the said drying of a metal plate is 60-80 degreeC in the temperature of a metal plate, for example.
Sodium hydroxide 28 parts by weight Sodium carbonate 13 parts by weight Water 59 parts by weight

  The pre-processed (base treatment) metal plate is transported to the masking device 30 by the transport device 10. The metal plate is transported by the transport roller 303 from the transport device 10 onto the moving table 302 at the upstream position of the printing stage 301 (the position indicated by the solid line in FIG. 1). It is fixed on the moving table 302 by inhaling air. For example, the moving table 302 moves intermittently from the upstream position to the downstream position (the position indicated by the broken line in FIG. 1) along the X direction, and the inkjet nozzle 305 continues in the Y direction. While scanning, a masking agent is applied to an unetched portion (a portion to be protected during etching) on the upper surface of the metal plate.

The masking agent is a liquid composition that has a property of being cured by irradiation with active energy rays and can be discharged from the inkjet nozzle 305. As the masking agent, the ink-jet ink composition described in Patent Document 1 is suitably used, and has, for example, the following composition. In the following composition, photopolymerization initiator 1 is 1-hydroxycyclohexyl phenyl ketone, and photopolymerization initiator 2 is bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide.
Bis [2- (methacryloyloxy) ethyl] hydrogen phosphate 6.0 parts by mass 2- (methacryloyloxy) ethyl dihydrogen phosphate 5.0 parts by mass Dipropylene glycol diacrylate 10.0 parts by mass Dimethylacrylamide 15.0 parts by mass Parts Isobornyl acrylate 44.5 parts by mass 2-acryloyloxyethyl succinic acid 5.5 parts by mass Photoinitiator 1 9.0 parts by mass Photoinitiator 2 5.0 parts by mass

  UV is irradiated from the UV lamp 306 on the rear side in the forward path from the inkjet nozzle 305 that discharges the masking agent while moving relative to the metal plate from one end to the other end in the Y direction. For this reason, the masking agent discharged on the surface of the metal plate is cured. The inkjet nozzle 305 that has reached the other end from one end in the Y direction returns from the other end to the one end. In this return path, UV is irradiated from the UV lamp 306 on the rear side in the traveling direction in the return path, and the masking agent on the metal plate is further cured. Thus, the masking agent is applied to the metal plate, and the desired image is printed.

  The metal plate coated (printed) with the masking agent is conveyed onto the conveying roller 303 by the ejection of air from the air nozzle of the moving table 302 that has arrived at the downstream position toward the conveying device 10, and the conveying roller 303. Is transferred onto the transfer device 10. The upper surface of the metal plate is irradiated with UV from the UV lamp 307 while being transported by the transport device 10. Thus, the masking agent printed on the upper surface of the metal plate is further cured, and a printed cured film is produced on the upper surface of the metal plate.

  The metal plate masked as described above is transported to the dryer 35 by the transport device 10, dried, and transported to the etching device 40. While the metal plate is transported at the above speed by the transport device 10 in the etching apparatus 40, hydrochloric acid is first sprayed on the upper surface of the metal plate, and then an aqueous solution of ferric chloride is sprayed. In this way, the unmasked portion (portion not having the cured film) on the upper surface of the metal plate is etched. Then, the solid matter (smut) on the upper surface of the metal plate generated by the etching process is removed from the upper surface by the smut removing device arranged in the downstream portion of the etching device 40. The etching process is performed at 50 to 80 ° C., for example.

  The metal plate subjected to the etching process is transported to the cleaning device 50 by the transport device 10. In the cleaning device 50, the metal plate is sprayed to the upper surface while being transported at the above speed by the transport device 10, and then the water on the upper surface is blown off by ejecting air from an air knife. Thus, the upper surface of the metal plate is cleaned.

  The etched metal plate whose upper surface has been cleaned is transported to the masking cured film removing device 60 by the transport device 10. In the masking cured film removing apparatus 60, a swelling liquid having a desired temperature (for example, 50 to 80 ° C.) is sprayed from the nozzle 61 and applied to the upper surface of the metal plate 111 being conveyed at the above speed by the conveying apparatus 10. The

The swelling liquid is a liquid that can swell the cured film. For example, the swelling liquid is a liquid that penetrates into the cured film or enters the interface between the cured film and the surface of the metal plate, and peels the cured film from the surface of the metal plate. The swelling liquid is appropriately selected according to the composition of the cured film. For example, when the curable material of the masking agent contains the polyfunctional (meth) acrylic acid compound, the liquid contains benzyl alcohol. For example, it has the following composition.
Benzyl alcohol 35 parts by weight Sodium 2,4-xylenesulfonate 15 parts by weight Water 50 parts by weight

  In the swelling liquid, benzyl alcohol is mainly a solvent for the cured film, and the content of benzyl alcohol in the swelling liquid is preferably 25 to 65% by mass, and preferably 30 to 40% by mass. More preferred. Sodium 2,4-xylene sulfonate is a surfactant, and the surfactant is mainly a solubilizer of benzyl alcohol in water. Other examples of such surfactants include sodium dodecylbenzene sulfonate, polyoxyalkylene alkyl ether and stearyl trimethyl ammonium chloride.

  The content of the surfactant in the swelling liquid is preferably 3 to 20% by mass, and more preferably 10 to 20% by mass. The water is a liquid medium in the swelling liquid. The content of water in the swelling liquid is preferably 20 to 60% by mass, and more preferably 40 to 55% by mass. Moreover, the content ratio (mass ratio) of water with respect to benzyl alcohol is preferably 0.3 to 2.5, and more preferably 1.2 to 2.0.

  In addition, the said swelling liquid may further contain the other component in the range in which the removal by the swelling of the said cured film is implement | achieved. Examples of the other components include caustic alkalis that do not contribute to dissolution of the cured film (for example, less than 1.0% by mass) and alcohol solvents such as isopropyl alcohol and butyl cellosolve.

  In addition, it is preferable that the temperature of the swelling liquid of the said composition is 70 degrees C or less. When the temperature of the swelling liquid exceeds 70 ° C., the evaporation rate of water is increased, the composition of the swelling liquid is changed, and as a result, there is a concern that the peeling performance is deteriorated, which is not preferable.

  The swelling liquid applied to the upper surface of the metal plate causes the cured film to swell and peel while the metal plate is transported through the masking cured film removing device 60, and the swelling liquid collecting tank 62 together with the cured film pieces. Flows down. The movement time of the metal plate in the masked cured film removing apparatus 60 is preferably 0.5 to 2.5 minutes from the viewpoint of sufficiently removing and removing the swollen cured film from the metal plate, and further etching. From the viewpoint of increasing the productivity of the metal plate, it is more preferably 0.5 to 2.0 minutes.

  In addition, it is a viewpoint which suppresses the occupation area of the masking cured film removal apparatus 60 in said manufacturing apparatus which etches while conveying a metal plate continuously at a constant speed that it is less than 2 minutes to an appropriate size. To preferred.

  The swelling liquid (recovered liquid) accommodated in the swelling liquid recovery tank 62 is guided to the pool part, and the cured film pieces in the recovered liquid are scooped up by the mesh belt of the mesh belt conveyor 63 to recover the cured film pieces. It is conveyed to the tank 68 and accommodated. The recovered liquid in which the cured film pieces are collected is sent from the swelling liquid recovery tank 62 to the strainer 64, and suspended matters (such as finer cured film pieces) in the recovered liquid are collected in the strainer 64. . The composition of the recovered liquid from which the suspended matter in the liquid has been removed is detected by the inspection device 65 and stored in the adjustment tank 66. Thus, solids such as the cured film pieces mixed in the recovery liquid are removed from the recovery liquid.

  In accordance with the composition of the recovered liquid detected by the inspection device 65, the adjustment tank 66 is supplied with insufficient material from the raw liquid tank 67 among the materials of the swelling liquid. For example, an amount of water corresponding to the water lost by evaporation is usually added to the swelling liquid having the above composition. The above material is uniformly mixed with the recovered liquid in the adjustment tank 66, and the temperature of the recovered liquid in the adjustment tank 66 is adjusted to a desired temperature. The recovered liquid whose composition and temperature are adjusted in this way is supplied to the nozzle 61 and reused as a swelling liquid. In addition, it is more preferable that the composition of the swelling liquid is simple from the viewpoint of easy and reliable reuse.

  The metal plate 111 from which the cured film has been removed is transported to the cleaning device 70 by the transport device 10. Water as a cleaning liquid is sprayed from the nozzle 71 on the etched surface (upper surface) of the metal plate 111 conveyed at the above speed by the conveying device 10, and the upper surface is rotated by a brush 73 that is driven to rotate. Rubbed. Therefore, various residues remaining on the upper surface flow down from the metal plate 111 to the cleaning liquid recovery tank 72 together with the water. Thus, the residue on the upper surface of the metal plate 111 is washed away from the metal plate 111.

  The water recovered in the cleaning liquid recovery tank 72 passes through the strainer 74, and the suspended matter in the water is collected by the strainer 74. The water from which the suspended matter is removed is sent to the nozzle 71 and repeatedly used as a cleaning liquid.

  The cleaned metal plate is conveyed, for example, under an air knife (not shown) as necessary, and unnecessary water on the upper surface of the metal plate is removed from the upper surface. In this way, the metal plate etched and cleaned to have the desired unevenness is transported to the laminating apparatus 80 by the transport apparatus 10.

  The laminating apparatus 80 bonds a film for preventing scratches to the surface of the etched metal plate. The film is supplied to the upper surface of the metal plate passing through the laminating apparatus 80, and is brought into close contact with, for example, a roller and cut with a cutter. Thus, an etched steel sheet is manufactured.

  As described above, the masked cured film removing apparatus 60 is a swelling liquid supply apparatus for supplying a swelling liquid that swells the cured film to the surface of the metal plate having the cured film of the masking agent. A swelling liquid reflux apparatus for collecting the swelling liquid supplied to the surface from the swelling liquid supply apparatus and retransmitting the swelling liquid to the swelling liquid supply apparatus. For this reason, it is possible to prevent the elution to the waste_water | drain of the component in a cured film. Therefore, in manufacturing an etched steel sheet using a cured film having an emission-restricted component such as phosphorus, wastewater treatment can be performed more easily, and the wastewater treatment cost can be further reduced.

  Moreover, since the masking cured film removal apparatus 60 swells and removes the cured film from the surface of the metal plate, it is possible to prevent foaming due to elution of components in the cured film. Therefore, there is no influence on the process of removing the cured film due to the foaming of the component, and the waste water after removing the cured film can be reused as the swelling liquid, and becomes easier.

  The masked cured film removing device 60 further includes a swelling liquid adjusting device for detecting and adjusting the composition of the recovered swelling liquid. For this reason, the performance of the reused swelling liquid is appropriately maintained, which is more effective from the viewpoint of simplification of waste water treatment and cost reduction.

  Further, the masked cured film removing device 60 further includes a cured film piece removing device for removing the cured film piece peeled off from the metal plate from the recovered liquid. For this reason, the clogging of the nozzle accompanying the reuse of the swelling liquid is prevented, which is more effective from the viewpoint of preventing the productivity from being lowered due to the reuse of the swelling liquid.

  The cured film piece removing device includes a mesh belt conveyor 63 and a strainer 64. Therefore, the recovered liquid is filtered with two or more stages of filters. As described above, the cured film piece removing device having two or more filters sufficiently removes the cured film piece from the recovered liquid and prevents clogging at the nozzle 61 due to reuse of the recovered liquid. Is even more effective.

  In addition, as described above, the etching metal plate manufacturing apparatus 100 includes the masking device 30 for producing a cured film of a masking agent on a portion to be protected on the surface of the metal plate, and the metal plate having the cured film. And an etching apparatus 40 for performing an etching process, and a masking cured film removing apparatus 60 for removing the cured film from the etched metal plate. For this reason, as described above, it is possible to reduce the load of wastewater treatment that occurs in the production of the etched metal plate.

  Further, the masking device 30 applies active energy rays to the masking agent coating device for applying the masking agent to the portion to be protected on the surface of the metal plate, and to the coating film of the masking agent on the surface of the metal plate. An active energy ray irradiation device for producing the cured film formed by curing the coating film by irradiation, and the masking agent coating device ejects droplets of the masking agent to discharge the surface of the metal plate. And a droplet discharge device for forming the coating film. For this reason, it is possible to finely apply the masking agent to the intended position, and masking is possible by applying the masking agent to the intended position. Compared to alkali-soluble resin masking, it is more effective from the viewpoint of easily performing fine masking.

  The masking device 30 is attached to the transport device 10. The inkjet nozzle 305 is usually accompanied by a nozzle check mechanism, and the nozzle check is periodically performed when the inkjet nozzle 305 is applied to a metal plate. The nozzle check mechanism may be disposed at any position in the masking device 30 as long as it is a part below the gantry 304 and a part other than the moving path of the moving table 302. The moving distance of 305 can be further shortened. Therefore, according to the masking device 30, it is possible to shorten the coating time of the masking agent as compared with the case where the masking agent is applied by scanning the ink jet nozzle 305 while fixing the metal plate. Therefore, the masking device 30 is more effective from the viewpoint of increasing the productivity of the etched metal plate.

  In addition, the masking device 30 includes UV lamps 306 for irradiating the masking agent on the metal plate on the front and rear sides of the inkjet nozzle 305 that moves relative to the metal plate. It is possible to irradiate the masking agent on the metal plate with UV in both the forward path and the backward path in the relative movement direction of the nozzle 305. For this reason, it is advantageous from the viewpoint of forming a high-definition image in which dripping of the masking agent droplets is prevented on a metal plate into which the masking agent does not permeate and improving the etching accuracy.

  In addition, the wavelength of UV irradiated from each of the UV lamps 306 and the UV lamp 307 may be the same or different. Moreover, the inkjet nozzle 305 may be rotatably arranged so as to be reversed in the relative movement direction, and may have a UV lamp only in one of the movement directions.

  Further, the masking device 30 is configured to move the inkjet nozzle 305 in order to move the inkjet nozzle 305 relative to the metal plate, but the inkjet nozzle 305 is fixed at the first position in the Y direction. It is also possible to apply the masking agent to the metal plate by moving the moving table 302 along the X direction.

  Two or more cleaning devices 70 may be arranged in series along the conveying direction of the metal plate. A plurality of cleaning devices 70 may be the same or different as long as the etched portion of the metal plate is cleaned. For example, the subsequent cleaning device 70 does not have to include the brush 73. Having a plurality of cleaning devices 70 arranged in series is more effective from the viewpoint of sufficiently cleaning the etched metal plate before the rust prevention treatment.

  Since the etching metal plate manufacturing apparatus and the masked cured film removing apparatus swell and remove the cured film that masks the metal plate from the metal plate without substantially dissolving it, the process liquid such as the swelling liquid and the cleaning liquid can be recycled. It can be used easily, and the treatment of process wastewater can be greatly reduced. Therefore, the further improvement of the productivity of an etching metal plate and the further spread of the said etching metal plate are anticipated.

DESCRIPTION OF SYMBOLS 10 Conveyance apparatus 20 Pre-processing apparatus 30 Masking apparatus 35 Dryer 40 Etching apparatus 50, 70 Cleaning apparatus 60 Masking cured film removal apparatus 61, 71 Nozzle 62 Swelling liquid collection tank 63 Mesh belt conveyor 64, 74 Strainer 65 Inspection apparatus 66 Adjustment tank 67 Stock solution tank 68 Cured film piece collection tank 72 Washing water collection tank 73 Brush 75 New water supply pipe 80 Laminating apparatus 100 Etching metal plate manufacturing apparatus 101 Drive roller 111 Metal plate 301 Printing stage 302 Moving table 303 Conveying roller 304 Base 305 Inkjet Nozzle 306, 307 UV lamp

Claims (5)

A swelling liquid supply device for supplying a swelling liquid for swelling the cured film to the surface of the metal plate having the cured film of the masking agent;
A swelling liquid reflux apparatus for recovering the swelling liquid supplied to the surface from the swelling liquid supply apparatus and retransmitting the swelling liquid to the swelling liquid supply apparatus;
An apparatus for removing a masked cured film.   The masking cured film removal apparatus of Claim 1 which further has a swelling liquid adjustment apparatus for detecting and adjusting the composition of the collect | recovered said swelling liquid.   The masking cured film removal apparatus of Claim 1 or 2 which further has a cured film piece removal apparatus for removing the cured film piece peeled from the said metal plate from the said swelling liquid collect | recovered. A masking device for producing a cured film of a masking agent on the portion of the surface of the metal plate to be protected;
An etching apparatus for performing an etching process on the metal plate having the cured film;
The masked cured film removing apparatus according to any one of claims 1 to 3, for removing the cured film from the etched metal plate,
An apparatus for manufacturing an etched metal plate. The masking device is
A masking agent application device for applying the masking agent to a portion of the surface of the metal plate to be protected;
An active energy ray irradiation device for producing the cured film formed by irradiating the coating film of the masking agent on the surface of the metal plate with an active energy ray and curing the coating film;
Including
The masking agent coating device is a droplet discharging device for discharging the masking agent droplets to form the coating film on the surface of the metal plate.
The manufacturing apparatus of the etching metal plate of Claim 4.

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