JP2018094497A - Coating material application device for inorganic material compact, coat material application method, and glass body with coating film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating material application device which optimizes the application quantity of a coating material and applies the coating material to a part of an inorganic material compact while preventing adhesion of foreign objects.SOLUTION: A coating material application device 1 is a device which applies a coating material C to cylindrical glass G1 which is an inorganic material compact having a cylindrical shape. The coating material application device 1 includes: a housing 2 which houses the cylindrical glass G1 in an application chamber 20 located therein; an injection nozzle 30 which injects the coating material C to the cylindrical glass G1 at the application chamber 20 in the housing 2; and an air conditioner 5 which controls an atmosphere of the application chamber 20 in the housing 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for applying a coating agent to an inorganic material molded body such as a glass body. More specifically, the present invention relates to a coating agent coating apparatus, which is an apparatus for applying a coating agent to an inorganic material molded body, The present invention relates to a coating agent coating method, and a glass body with a coating film in which a coating film is formed by the coating agent applied by them.

  A technique for forming a coating film on the surface of an inorganic material molded body is to immerse the inorganic material molded body in a tank filled with a solution containing the components of the coating film, and then heat-treat the inorganic material molded body. A technique for forming a film is conventionally known.

In Patent Document 1, a quartz glass tube, which is an inorganic material molded body, is immersed in a Ce + Si alcoholate solution, and the solution is applied to the outer wall and / or the inner wall of the quartz glass tube, and then fired to obtain CeO _2. A technique for forming a SiO ₂ layer (coating film) is disclosed.

JP 63-213253 A

In the method of immersing the entire inorganic material molded body in a solution (coating agent), there is a problem that an extra coating agent is applied and the coating agent is consumed in an amount more than necessary for forming a coating film.
In addition, in the method of immersing the inorganic material molded body in the coating agent, while the operation of immersing the inorganic material molded body in the coating agent is repeated, foreign substances are accumulated in the coating agent, and the coating agent is applied. Therefore, there is a problem that foreign matter adheres to the inorganic material molded body.
Furthermore, in the method of immersing the entire inorganic material molded body in the coating agent, it is easy to apply the coating agent to the entire inorganic material molded body, but only the inner peripheral surface of the cylindrical glass or the main surface on one side of the plate glass Thus, it was difficult to apply the coating agent to a part of the inorganic material molded body.

  The present invention has been made in view of such a current problem, and it is possible to apply a coating agent to a part of an inorganic material molded body while optimizing the coating amount of the coating agent and preventing adhesion of foreign substances. An object of the present invention is to provide a coating agent coating apparatus and a coating agent coating method that can be used.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the coating agent coating apparatus for an inorganic material molded body according to the present invention is a coating agent coating apparatus that applies a coating agent to an inorganic material molded body, and includes a closed housing that can accommodate the inorganic material molded body therein. And a nozzle that injects the coating agent toward the inorganic material molded body inside the closed casing, and an air conditioning unit that adjusts an internal atmosphere of the closed casing.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, by adopting a spray method, the coating amount of the coating agent is optimized, and adhesion of foreign matters is prevented while part of the inorganic material molded body. A coating agent can be applied.

Moreover, the coating agent coating device for an inorganic material molded body according to the present invention includes a displacement device for displacing the nozzle along the coating surface of the inorganic material molded body.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, the coating agent can be applied evenly to a part of the inorganic material molded body.

Further, in the coating agent coating apparatus for an inorganic material molded body according to the present invention, the air conditioning means controls the pressure inside the closed casing to be higher than the pressure outside the closed casing. And
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, foreign matter can be prevented from entering the closed casing, and foreign matter can be reliably prevented from adhering to the coated coating agent.

In the coating apparatus for an inorganic material molded body according to the present invention, the coating agent is a dispersion liquid containing at least one of silica, zirconia, titania and alumina.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, a coating film for improving acid resistance can be easily formed on the inorganic material molded body.

Moreover, in the coating agent coating apparatus for an inorganic material molded body according to the present invention, the air conditioning means controls the humidity inside the closed casing to be 20% or more and 70% or less.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, the coating environment of the coating agent can be kept uniform, and the quality of the coating film can be improved.

Moreover, in the coating agent coating apparatus for an inorganic material molded body according to the present invention, the air conditioning means controls the temperature inside the closed casing to 25 ° C. or more and 30 ° C. or less.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, the coating environment of the coating agent can be kept more uniform, and the quality of the coating film can be improved more reliably.

Further, in the coating agent coating apparatus for an inorganic material molded body according to the present invention, the inorganic material molded body is a cylindrical glass, and the cylindrical glass is oriented in the vertical direction inside the closed casing. The nozzle is displaced by the displacing means from below to above on the cylindrical axis, and the coating agent is sprayed from the nozzle toward the inner peripheral surface of the cylindrical glass. And
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, it is possible to apply the coating agent to the inner peripheral surface of the cylindrical glass while optimizing the coating amount of the coating agent and preventing adhesion of foreign matters. .

Moreover, the coating agent coating apparatus for an inorganic material molded body according to the present invention is characterized by comprising exhaust means for exhausting the internal atmosphere of the closed casing from the upper part of the closed casing.
According to the coating agent coating apparatus for an inorganic material molded body having such a configuration, a solvent that volatilizes from the coating agent or a foreign substance floating in the atmosphere can be discharged to the outside of the closed casing. The atmosphere can be kept uniform.

The inorganic material molded body coating method according to the present invention is a coating agent coating method in which a coating agent is applied to an inorganic material molded body, and the inorganic material molded body is accommodated in a closed casing whose internal atmosphere is controlled. And in the inside of the said closed housing | casing, the said coating agent is sprayed toward the said inorganic material molded object from a nozzle, and the said coating agent is apply | coated to the said inorganic material molded object.
According to the coating agent coating method having such a configuration, it is possible to apply the coating agent to a part of the inorganic material molded body while optimizing the coating amount of the coating agent and preventing adhesion of foreign matters.

Moreover, the glass body with a coating film according to the present invention applies a coating agent to the inner peripheral surface of a cylindrical glass body and heats the coating agent to form a coating film only on the inner peripheral surface of the glass body. It is characterized by being.
According to the glass body with a coating film having such a configuration, it is possible to improve the beauty of the cylindrical glass having a functional film.

Moreover, the glass body with a coating film according to the present invention applies a coating agent to one principal surface of a plate-like glass body, heats the coating agent, and only on one principal surface of the glass body. A coating film is formed.
According to the glass body with a coating film having such a configuration, it is possible to improve the beauty of the plate glass having a functional film.

  As effects of the present invention, the following effects can be obtained.

  According to the coating agent coating apparatus and coating agent coating method for an inorganic material molded body according to the present invention, the coating agent is applied to a part of the inorganic material molded body while optimizing the coating amount of the coating agent and preventing the adhesion of foreign matters. Can be applied.

  Moreover, according to the glass body with a coating film which concerns on this invention, the beauty | look of the glass body which has a functional film can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The front view cross-sectional schematic diagram which shows the whole structure of the coating agent coating device (when an application target object is cylindrical glass) which concerns on one Embodiment of this invention. The perspective schematic diagram which shows the whole structure of the coating agent coating device which concerns on one Embodiment of this invention. The schematic diagram which shows the injection nozzle suitable for cylindrical glass. The schematic diagram which shows the coating method (before application | coating start) of the coating agent by the coating agent application apparatus with respect to cylindrical glass. The schematic diagram which shows the coating method (application | coating start-during application | coating) of the coating agent by the coating agent application | coating apparatus with respect to cylindrical glass. The schematic diagram which shows the coating method (during application-completion | finish of application | coating) of the coating agent by the coating agent application | coating apparatus with respect to cylindrical glass. BRIEF DESCRIPTION OF THE DRAWINGS Front view cross-sectional schematic diagram which shows the whole structure of the coating agent coating device (when an application target object is plate glass) which concerns on one Embodiment of this invention. The schematic diagram which shows the injection nozzle suitable for plate glass. The schematic diagram which shows the coating method of the coating agent by the coating agent application apparatus with respect to plate glass.

Next, embodiments of the invention will be described.
The coating agent coating apparatus for an inorganic material molded body according to the present invention is an apparatus that applies a coating agent to a glass body that is an example of an inorganic material molded body. The “inorganic material molded body” in the present description is a member composed of, for example, glass, ceramic, or glass ceramic (crystallized glass).

The overall configuration of the coating agent coating apparatus for an inorganic material molded body according to the first embodiment of the present invention will be described.
As shown in FIG. 1 and FIG. 2, a coating agent application device 1 is an embodiment of a coating agent application device for an inorganic material molded body according to the present invention, and includes a housing 2, an injection device 3, an exhaust device 4, and an air conditioner. 5. A control device 6 and the like are provided.
The coating agent coating apparatus 1 uses a cylindrical glass G1 which is a cylindrical inorganic material molded body G as an object to be coated with the coating agent C.

The casing 2 is a closed casing that accommodates the cylindrical glass G1 that is an object to be coated with the coating agent C by the coating agent application apparatus 1, and the casing 2 is used to apply the coating agent C to the cylindrical glass G1. A coating chamber 20 is configured. The coating chamber 20 is airtight so that the coating agent C sprayed in the coating chamber 20 does not leak outside.
Further, the coating chamber 20 is provided with a stage 21 on which the cylindrical glass G1 is disposed.

  The spray device 3 is a device for spraying the coating agent C onto the cylindrical glass G <b> 1 on the stage 21, and includes a spray nozzle 30.

Here, the configuration of the spray nozzle 30 in the coating agent coating apparatus 1 will be described.
3, the injection nozzle 30 has a plurality of injection holes 32, 32... Formed at the tip of a tubular nozzle body 31. As shown in FIG. The injection nozzle 30 has a shape suitable for applying the coating agent C to the inner peripheral surface of the cylindrical glass G 1, and a plurality of injection holes 32, 32... With respect to the axis X of the nozzle body 31. In a direction orthogonal to each other and radially around the axis X. In addition, in the injection nozzle 30, it is set as the structure which forms the 12 injection holes 32 at equal pitches centering on the axial center X (it shifts an angle every 30 degrees).

As shown in FIGS. 1 and 2, the injection device 3 further includes a displacement device 33, a supply pump 34, a tank 35, and the like.
The displacement device 33 is a device that supports the injection nozzle 30 so as to be displaceable in the vertical direction. The displacement device 33 includes an air cylinder and includes a cylinder portion 33A that is displaced in the vertical direction. The injection nozzle 30 is attached to the cylinder portion 33A via a support member 36 in a posture in which the axis X (see FIG. 3) is vertically oriented.
In addition, the injection nozzle 30 can adjust the relative position of the injection nozzle 30 with respect to the cylinder portion 33 </ b> A by adjusting the length and fixed position of the support member 36.
With such a configuration, the arrangement position of the spray nozzle 30 in the coating chamber 20 can be adjusted according to the specifications (size and length) of the cylindrical glass G1.

  The supply pump 34 is a device that supplies the coating agent C stored in the tank 35 to the spray nozzle 30. The supply pump 34 and the injection nozzle 30 are connected by a pipe 37, a hose 38, and the like. In particular, in the coating chamber 20, in order to make the spray nozzle 30 displaceable, a pipe 37 for supplying the coating agent C and a rear end portion 31A (see FIG. 3) of the nozzle body 31 are provided with a flexible hose 38. Connected through.

  In the injection device 3, an electromagnetic valve 39 is provided in the middle of the pipe 37 for supplying the coating agent C, and the electromagnetic valve 39 is opened at a predetermined timing based on a command signal from the control device 6. By doing so, the coating agent C is injected from the injection nozzle 30 at a predetermined timing.

The coating agent C applied to the cylindrical glass G1 by the coating agent application device 1 is for forming a functional film for improving the acid resistance of the cylindrical glass G1, and is a dispersion agent (generic name: colloidal silica) containing silica. is there.
In this embodiment, a dispersion liquid containing silica is used as the coating agent C. However, the coating agent C used in the coating agent coating apparatus 1 is a dispersion containing at least one of silica, zirconia, titania, and alumina. What is necessary is just a liquid agent. Further, the type of the coating agent C applied by the coating agent application apparatus 1 is not limited to the one for improving acid resistance, and aims to improve other functions such as wear resistance improvement, heat resistance improvement and antireflection. It may be a coating agent.

That is, the coating agent C used in the coating agent coating apparatus 1 according to one embodiment of the present invention is a dispersion liquid containing at least one of silica, zirconia, titania, and alumina.
According to the coating agent coating apparatus 1 for an inorganic material molded body having such a configuration, a coating film for improving acid resistance can be easily formed on the cylindrical glass G1.

  In the housing 2, a shielding plate 22 is disposed below the stage 21, and an opening 23 is formed in the shielding plate 22. The opening 23 is formed in a size and a position where the injection nozzle 30 can be inserted when the injection nozzle 30 is displaced downward by the displacement device 33. The shielding plate 22 prevents the extra coating agent C from being applied to the cylindrical glass G1.

  Further, the housing 2 is fixed to the upper part of the gantry 24, and the supply pump 34 and the tank 35 are arranged in an empty space in the gantry 24.

  The exhaust device 4 is a device that exhausts the inside of the coating chamber 20 of the housing 2 and includes an exhaust fan 40 and an exhaust duct 41. One end of the exhaust duct 41 communicates with the inside of the coating chamber 20, and the other end is connected to the exhaust fan 40. With this configuration, the exhaust device 4 can exhaust the air in the coating chamber 20 to the outside of the housing 2 through the exhaust duct 41 by operating the exhaust fan 40.

The air conditioner 5 is an apparatus for adjusting the atmosphere in the coating chamber 20 of the casing 2, and includes an air conditioner body 50, an air supply fan 51 built in the air conditioner body 50, an air supply adjustment unit 52, and the like. It has.
The air conditioner main body 50 is formed with an air supply port 50A, a return air port 50B, and an outside air intake port 50C, and the air supply port 50A and the return air port 50B communicate with the inside of the coating chamber 20.

The air conditioner 5 operates the air supply fan 51 to supply air conditioned in the coating chamber 20 from the air supply port 50 </ b> A, and the air in the coating chamber 20 is returned to the air conditioner body 50. Furthermore, the outside air corresponding to the amount of air exhausted by the exhaust device 4 is configured to be sucked into the air conditioner body 50 from the outside air intake 50C.
In the coating agent application device 1, by adjusting the outside air intake amount from the outside air intake port 50 </ b> C in the air conditioner 5 with respect to the exhaust amount by the exhaust device 4, the inside of the casing 2 (that is, The balance between supply and exhaust is adjusted so that the coating chamber 20) has a higher pressure than the outside of the housing 2.

  The air supply adjustment unit 52 is a part for adjusting the state (temperature and humidity) of the air supplied into the coating chamber 20, and is a coil for adjusting the temperature and humidity of the supply air (a cold / hot water coil or a direct expansion). Coil, etc.), heater (electric heater), humidifier (ultrasonic humidifier, steam humidifier, etc.) and the like.

  In the coating agent coating apparatus 1, the air conditioner 5 keeps the humidity in the coating chamber 20 at 20% or more and 70% or less, preferably 25% or more and 65% or less, more preferably 30% or more and 60% or less. I have to. In the coating agent coating apparatus 1, the temperature in the coating chamber 20 is maintained at 25 ° C. or more and 30 ° C. or less by the air conditioner 5.

Further, the coating agent coating apparatus 1 includes a control device 6.
The control device 6 is a device that controls the operation of each part of the coating agent application device 1, and is electrically connected to the injection device 3, the exhaust device 4, and the air conditioner 5.

  In the injection device 3, the timing at which the injection nozzle 30 is displaced up and down by the displacement device 33 and the timing at which the coating agent C is injected from the injection nozzle 30 are controlled based on the command signal output from the control device 6.

  The exhaust device 4 is controlled to operate the exhaust fan 40 based on a command signal output from the control device 6, and the air conditioner 5 is controlled based on the command signal output from the control device 6. The timing for operating 51 is controlled. The exhaust device 4 and the air conditioner 5 are configured to operate in conjunction with each other by the control device 6.

The control device 6 is connected to various sensors (not shown) provided in the coating chamber 20. In the coating chamber 20, a humidity sensor, a temperature sensor, a differential pressure sensor, and the like are provided.
The control device 6 controls the air supply adjusting unit 52 of the air conditioner 5 according to the detection value of the humidity sensor, thereby controlling the humidity in the coating chamber 20. Further, the control device 6 controls the air supply adjustment unit 52 of the air conditioner 5 according to the detection value of the temperature sensor, thereby controlling the temperature in the coating chamber 20. Furthermore, the control device 6 detects the pressure difference between the inside (coating chamber 20) and the outside of the housing 2 by the differential pressure sensor, and controls the air supply amount (fan rotation speed) of the air supply fan 51 of the air conditioner 5. To do.

Furthermore, in the coating agent coating apparatus 1, a sensor (limit switch) (not shown) that detects the open / closed state of the door 2A is provided on the door 2A (see FIG. 2) in front of the housing 2. And in the coating agent coating apparatus 1, the said sensor is connected to the control apparatus 6, and when the door 2A is open, it is controlled by the control apparatus 6 so that the injection apparatus 3 is not operated. Further, in the coating agent application device 1, when the door 2A is open, the control device 6 stops the air conditioner 5 and activates only the exhaust device 4, and activates the air conditioner 5 when the door 2A is closed. In this way, energy is saved.
In addition, in the coating agent coating apparatus 1, since the coating agent C containing a solvent is handled, the specification of each apparatus is an explosion-proof specification.

Next, the coating method of the coating agent C by the coating agent coating apparatus 1 will be described.
In this embodiment, the coating agent C is applied to the inner peripheral surface P of the cylindrical glass G1 having a diameter of about 150 to 200φ by the coating agent application apparatus 1 so that the film thickness is about 50 to 200 nm. Illustrated.
The operation of applying the coating agent C by the coating agent application apparatus 1 is performed by a predetermined operator attached to the control device 6 or the like after the operator sets the cylindrical glass G1 on the stage 21 in the application chamber 20. Start by pressing the work start switch.

  When the coating agent C is applied to the cylindrical glass G1 by the coating agent application device 1, the atmosphere in the application chamber 20 of the housing 2 is adjusted by the air conditioner 5. Specifically, the humidity in the coating chamber 20 is adjusted to 20% to 70%, preferably 25% to 65%, more preferably 30% to 60% by the air conditioner 5. Moreover, in the coating agent coating apparatus 1, the temperature in the coating chamber 20 of the housing 2 is adjusted to 25 ° C. or higher and 30 ° C. or lower. By adjusting the atmosphere in the coating chamber 20 to such environmental conditions, the state of the coating agent C (e.g., the volatilization rate of the material and the diffusion rate after coating) can be stabilized. The coating state of the agent C can be made uniform.

That is, in the coating agent application device 1 and the coating agent application method according to the embodiment of the present invention, the air conditioner 5 controls the humidity of the application chamber 20 to 20% or more and 70% or less, and the temperature of the application chamber 20 is increased. And 25 ° C. or more and 30 ° C. or less.
According to the coating agent coating apparatus 1 and the coating agent coating method for an inorganic material molded body having such a configuration, the coating environment of the coating agent C can be maintained more uniformly, and the quality of the coating film can be improved more reliably. Can do.

As shown in FIG. 4, when a coating film is formed on the inner peripheral surface P of the cylindrical glass G <b> 1 by the coating agent application device 1, first, the injection nozzle of the injection device 3 based on the command signal of the control device 6. 30 is displaced by the displacement device 33, the injection nozzle 30 is inserted into the opening 23, and the injection holes 32, 32... Formed in the injection nozzle 30 are positioned below the shielding plate 22.
The cylindrical glass G1 is disposed on the stage 21 so that the cylindrical axis of the cylindrical glass G1 is positioned on the displacement axis of the injection nozzle 30.

  Further, in the sealed coating chamber 20, the internal atmosphere is exhausted from the top by the exhaust device 4, and the volatilized solvent or the extra coating agent C scattered in the form of a mist from the coating chamber 20. Discharged. At this time, the air supply amount, the return air amount, and the outside air intake amount are adjusted by the air conditioner 5 so that the inside of the coating chamber 20 has a positive pressure compared to the outside of the housing 2.

That is, in the coating agent coating apparatus 1 according to one embodiment of the present invention, the air conditioner 5 controls the pressure inside the housing 2 higher than the pressure outside the housing 2.
According to the coating agent coating apparatus 1 for an inorganic material molded body having such a configuration, it is possible to prevent foreign matter from entering the housing 2 and reliably prevent foreign matter from adhering to the coated coating agent C. Can do.

The coating agent application device 1 according to an embodiment of the present invention includes an exhaust device 4 that exhausts the internal atmosphere of the housing 2 from the upper portion of the housing 2.
According to the coating agent coating apparatus 1 for an inorganic material molded body having such a configuration, a solvent that volatilizes from the coating agent C, foreign matters floating in the atmosphere, and the like can be discharged to the outside of the housing 2. The atmosphere in the body 2 (that is, the coating chamber 20) can be kept uniform.

  As shown in FIG. 5, with the injection holes 32, 32... Positioned below the shielding plate 22, the control device 6 sets the electromagnetic valve 39 (see FIG. 1) to “open” to inject. The spray of the coating agent C is started from the holes 32, 32. In the present description, the mist coating agent C before being applied to the inorganic material molded body G is also referred to as a mist coating agent C1.

Since the spraying unevenness of the mist coating agent C1 is likely to occur at the beginning of the spraying of the coating agent C, the displacing of the spray nozzle 30 is started after the spraying state of the mist coating agent C1 is stabilized.
When the coating agent C is applied to the inner peripheral surface P of the cylindrical glass G1 by the coating agent application device 1, the operation of the displacement device 33 is controlled by the control device 6, and the injection nozzle 30 is moved to the inner peripheral surface of the cylindrical glass G1. The coating agent C is applied in the form of a film in order from the bottom to the top while being displaced from P to P along the P. In the present description, the coating agent C after being applied to the inorganic material molded body G is also referred to as a film-like coating agent C2.

That is, the coating agent application device 1 according to an embodiment of the present invention includes a displacement device 33 that displaces the spray nozzle 30 along the inner peripheral surface P that is the application surface of the cylindrical glass G1.
Moreover, the coating agent application | coating method which concerns on one Embodiment of this invention is directed toward cylindrical glass G1 from the injection nozzle 30, displacing the injection nozzle 30 along the internal peripheral surface P which is an application surface of cylindrical glass G1. The coating agent C is sprayed.
According to the coating agent coating apparatus 1 and the coating agent coating method for an inorganic material molded body having such a configuration, the coating agent C can be uniformly applied to a part of the cylindrical glass G1.

Furthermore, the coating agent application | coating method which concerns on one Embodiment of this invention displaces the injection nozzle 30 toward the upper direction from the downward direction along the internal peripheral surface P which is an application surface of cylindrical glass G1.
According to the coating agent application method having such a configuration, the coating agent C can be applied evenly with a portion of the cylindrical glass G1.

  Then, as shown in FIG. 6, when the film coating agent C2 is applied up to the upper end of the inner peripheral surface of the cylindrical glass G1, the control device 6 sets the electromagnetic valve 39 (see FIG. 1) to “closed” and injects The spraying of the mist-like coating agent C1 from the holes 32, 32,... Is stopped and the displacement of the spray nozzle 30 is stopped.

  In the coating agent coating apparatus 1, the coating agent C can be applied to the inner peripheral surface of the cylindrical glass G1 without unevenness in this way.

  After coating the coating agent C using the coating agent coating apparatus 1, the cylindrical glass G1 is turned upside down and allowed to stand, whereby the film thickness of the coating agent C2 is made uniform. By performing the treatment or the like, it is possible to form a high-quality coating film having a more uniform film thickness as compared with the prior art.

Thus, in the spray-type coating agent coating apparatus 1, the coating agent C does not touch the other cylindrical glass G1 or the like from the state stored in the tank 35 until it is applied to the cylindrical glass G1. Therefore, it is difficult for foreign matter to be accumulated in the coating agent C. For this reason, when the coating agent coating apparatus 1 is used, it is possible to prevent a situation in which the quality of the coating film is impaired by the foreign matter mixed in the coating agent C.
Furthermore, in the spray-type coating agent coating apparatus 1, since the coating agent C is ejected from the ejection nozzle 30 only as much as necessary, the amount of extra coating agent C that does not contribute to the formation of the coating film is greatly reduced. be able to. Further, since a tank for storing the coating agent C and soaking the inorganic material molded body G is not necessary, the work space can be reduced.

That is, the coating agent application apparatus 1 according to an embodiment of the present invention is an apparatus that applies the coating agent C to the cylindrical glass G1, and includes a housing 2 that can accommodate the cylindrical glass G1 therein, An injection nozzle 30 that injects the coating agent C toward the cylindrical glass G1 and an air conditioner 5 that controls the internal atmosphere of the housing 2 are provided.
According to the coating agent coating apparatus 1 for an inorganic material molded body having such a configuration, the coating agent is applied to a part of the cylindrical glass G1 while the coating amount of the coating agent C is optimized by the spray method and adhesion of foreign matters is prevented. C can be applied.

Moreover, in the coating agent coating apparatus 1 which concerns on one Embodiment of this invention, the inorganic material molded object G is the cylindrical glass G1, and the attitude | position which orient | assigned the cylindrical glass G1 to the up-down direction inside the housing | casing 2 in the cylindrical glass G1. The spray nozzle 30 is displaced from below to above by the displacement device 33, and the coating agent C is sprayed from the spray nozzle 30 toward the inner peripheral surface P of the cylindrical glass G1. Is.
According to the coating agent coating apparatus 1 for an inorganic material molded body having such a configuration, the coating agent C is applied to the inner peripheral surface P of the cylindrical glass G1 while optimizing the coating amount of the coating agent C and preventing adhesion of foreign matters. Can be applied.

  In addition, according to the coating agent coating apparatus 1 which concerns on one Embodiment of this invention, although the coating agent C can be easily apply | coated to the internal peripheral surface P which is a part of cylindrical glass G1, for example, cylindrical glass G1 If the nozzle which injects the coating agent C toward the outer peripheral surface or the end surface of this is separately provided, the coating agent C can be easily applied to the entire cylindrical glass G1.

Furthermore, the coating agent application method according to an embodiment of the present invention is a method of applying the coating agent C to the cylindrical glass G1, and the cylindrical glass G1 is accommodated in the casing 2 in which the internal atmosphere is controlled. In the body 2 (that is, the coating chamber 20), the coating agent C is sprayed from the spray nozzle 30 toward the cylindrical glass G1, and the coating agent C is applied to the cylindrical glass G1.
According to the coating agent coating method having such a configuration, it is possible to apply the coating agent C to a part of the cylindrical glass G1 while optimizing the coating amount of the coating agent C and preventing adhesion of foreign matters.

And the cylindrical glass with a coating film manufactured using the coating agent application | coating apparatus 1 has provided the functional film only to the internal peripheral surface of cylindrical glass G1. Because functional films may impair the transparency and hue of glass, it is better to apply the coating only to the inner peripheral surface than to the inner peripheral surface and the outer peripheral surface. Cylindrical glass GA is obtained.
That is, by using the spray-type coating agent coating apparatus 1, a coating film is formed on a part of the inorganic material molded body G, which is difficult in the conventional method (method of immersing in the coating agent stored in the tank). This makes it possible to obtain a coated-coated cylindrical glass GA with an excellent aesthetic appearance.

That is, the cylindrical glass GA with a coating film, which is a glass body with a coating film according to an embodiment of the present invention, has an inner peripheral surface P of the cylindrical glass G1 by the coating agent C applied to the inner peripheral surface P of the cylindrical glass G1. Only the coating film is formed.
With such a configuration, it is possible to improve the aesthetic appearance of the coated-coated cylindrical glass GA.

  In the coating agent application apparatus 1 shown in the present embodiment, the coating agent C can be applied to two cylindrical glasses G1 and G1 at the same time because the spraying device 3 has two systems. The efficiency of the operation of applying the coating agent C can be improved.

  In the embodiment shown so far, the case where the coating target of the coating agent C by the coating agent coating apparatus 1 is the cylindrical glass G1 is illustrated, but the coating agent coating apparatus 1 can be replaced by replacing the spray nozzle 30. It can also be used for applications in which a coating agent C is applied to an inorganic material molded body G having the following shape.

Here, a coating agent coating apparatus according to another embodiment will be described.
As shown in FIG. 7, a coating agent coating apparatus 11 according to another embodiment is an example of a coating agent coating apparatus for an inorganic material molded body according to the present invention, and coats a plate glass G2 that is a plate-like inorganic material molded body G. Suitable for the application of the agent C. The coating agent application device 11 is different from the coating agent application device 1 in that it includes an injection device 13 having an injection nozzle 60. The injection device 13 is common to the injection device 3 except for the injection nozzle 60.

  As shown in FIG. 8, the injection nozzle 60 has a tubular nozzle body 61 with a tip end bent 90 degrees with respect to the axis Y, and a nozzle body 62 is provided at the end of the bent portion. An injection hole 63 is formed at the tip of the nozzle body 62 and is configured so that the coating agent C can be injected in a form having a substantially fan-like shape when viewed in the direction of the axis Y. In addition, as shown in the side view, the coating agent C injected from the injection hole 63 is prevented from spreading in the vertical direction.

Next, a method for applying the coating agent C by the coating agent application apparatus 11 will be described.
When the coating agent C is applied to the glass sheet G2 by the coating agent application device 11 shown in FIG. 7, the humidity in the application chamber 20 of the housing 2 is 20% or more and 70% or less, preferably 25% or more by the air conditioner 5. The temperature is adjusted to 65% or less, more preferably 30% to 60%, and the temperature in the coating chamber 20 is adjusted to 25 ° C. or more and 30 ° C. or less.

  Further, in the sealed coating chamber 20, the internal atmosphere is exhausted from the upper part by the exhaust device 4, and a volatilized solvent or extra coating agent C scattered in a mist form is applied in the coating chamber 20. Discharged from. At this time, the balance of the supply air amount, the return air amount, and the outside air intake amount is adjusted by the air conditioner 5 so that the inside of the coating chamber 20 becomes a positive pressure as compared with the outside of the housing 2. .

As shown in FIG. 9, when the coating agent C is applied to the main surface Q on one side of the plate glass G <b> 2 by the coating agent application device 11, first, based on the command signal of the control device 6, The injection nozzle 60 is displaced by the displacement device 33, the injection nozzle 60 is inserted through the opening 23, and the nozzle body 62 attached to the injection nozzle 60 is positioned below the shielding plate 22.
The plate glass G2 is arranged on the stage 21 such that the position where the injection hole 63 (see FIG. 8) of the nozzle body 62 is directed is located at the center in the width direction of the plate glass G2.

Then, in a state where the nozzle body 62 is positioned below the shielding plate 22, the electromagnetic valve 39 (see FIG. 7) is set to “open”, and the spray of the coating agent C from the spray hole 63 is started. At the beginning of the spraying of the mist coating agent C1, since the spray unevenness of the mist coating agent C1 is likely to occur, the spray nozzle 60 starts to be displaced after the spraying state of the mist coating agent C1 is stabilized.
In the case where the coating agent C is applied to the main surface Q of the plate glass G2 by the coating agent application device 11, the spray nozzle 60 is displaced from the bottom to the top along the main surface Q of the plate glass G2. The coating agent C is applied in the form of a film in order. At this time, the injection nozzle 60 is pulled up at a constant speed by the displacement device 33.

  When the mist-like coating agent C1 is applied to the main surface Q by the coating agent application device 11, a film-like coating agent C2 is formed, and the film is sequentially applied from below the main surface Q on one side of the plate glass G2 by the spray nozzle 60. The coating agent C2 is applied.

  And when the film-like coating agent C2 is applied to the upper end of the main surface on one side of the plate glass G2, the electromagnetic valve 39 (see FIG. 7) is set to “closed”, and the mist-like coating agent C1 from the injection hole 63 While the injection is finished, the displacement of the injection nozzle 60 is stopped.

  In the coating agent application device 11, the film-like coating agent C2 can be applied evenly only to the main surface Q on one side of the plate glass G2.

  And after apply | coating the coating agent C using the coating agent application | coating apparatus 11, the film thickness of the film-form coating agent C2 is equalize | homogenized by inverting plate glass G2 upside down, and then heat-processing. By performing a baking treatment or the like, it is possible to form a high-quality coating film having a more uniform film thickness as compared with the prior art.

That is, the coating agent application apparatus 11 according to an embodiment of the present invention is an apparatus that applies the coating agent C to the plate glass G2, and the housing 2 that can accommodate the plate glass G2 therein, The spray nozzle 60 which injects the coating agent C toward the plate glass G2, and the air conditioner 5 which controls the internal atmosphere of the housing | casing 2 are provided.
According to the coating agent coating apparatus 11 for an inorganic material molded body having such a configuration, the coating agent C is applied to a part of the plate glass G2 while the coating amount of the coating agent C is optimized by the spray method and adhesion of foreign matters is prevented. Can be applied.

The coating agent application method according to an embodiment of the present invention is a method of applying the coating agent C to the plate glass G2, in which the plate glass G2 is accommodated in the casing 2 in which the internal atmosphere is controlled. The coating agent C is sprayed from the spray nozzle 60 toward the plate glass G2 in the inside (that is, the coating chamber 20), and the coating agent C is applied to the plate glass G2.
According to the coating agent coating method having such a configuration, it is possible to apply the coating agent C to a part of the plate glass G2 while optimizing the coating amount of the coating agent C and preventing adhesion of foreign substances.

And as for the plate glass with a coating film manufactured using the coating agent application | coating apparatus 11, the functional film is provided only to the main surface Q of the one side of plate glass G2. Since functional films may impair the transparency and color of glass, it is better to apply only one main surface Q than to the main surface on both sides of the front and back. A plate glass GB is obtained.
That is, by using the spray-type coating agent coating apparatus 11, a coating film is formed on a part of the inorganic material molded body G, which is difficult in the conventional method (method of immersing in the coating agent stored in the tank). This makes it possible to obtain a coated glass sheet GB having an excellent aesthetic appearance.

That is, the coated glass sheet GB, which is a coated glass body according to an embodiment of the present invention, is coated on the principal surface Q on one side of the sheet glass G2 by the coating agent C on one side of the sheet glass G2. A coating film is formed only on Q.
With such a configuration, the aesthetics of the coated glass sheet GB can be improved.

In the coating agent application device 11 shown in the present embodiment, since the two injection devices 3 are provided, the coating agent C can be applied to the two glass sheets G2 and G2 at the same time. The efficiency of the operation of applying the agent C can be improved.
In the coating agent coating apparatus 11, the coating agent C can be simultaneously applied to the large plate glass G2 by the two spray nozzles 60 and 60, and the coating agent C can be applied to the large plate glass G2. It is possible to improve work efficiency.

1 Coating agent application device 2 Case (closed case)
4 Exhaust device (exhaust means)
5 Air conditioner (air conditioning means)
11 Coating agent application device (another embodiment)
30 Injection nozzle (nozzle)
33 Displacement device (displacement means)
60 injection nozzle (another embodiment of the nozzle)
G Inorganic material molded body G1 Cylindrical glass (Inorganic material molded body)
G2 Sheet glass (inorganic material molded body)
GA Cylindrical glass with coating film GB Plate glass with coating film C Coating agent P Inner peripheral surface (coating surface)
Q Main surface (application surface)

Claims (11)

A coating agent application apparatus for applying a coating agent to an inorganic material molded body,
A closed housing capable of accommodating the inorganic material molded body therein;
A nozzle for injecting the coating agent toward the inorganic material molded body in the closed casing;
Air conditioning means for adjusting the internal atmosphere of the closed casing;
Comprising
A coating agent coating apparatus for an inorganic material molded body. The nozzle,
Displacement means for displacing along the application surface of the inorganic material molded body,
The coating agent coating apparatus for inorganic material molded bodies according to claim 1. The air conditioning means includes:
Controlling the pressure inside the closed casing to be higher than the pressure outside the closed casing;
The coating agent coating apparatus for inorganic material molded bodies according to claim 1 or 2, characterized in that The coating agent is
A dispersion liquid containing at least one of silica, zirconia, titania, and alumina,
The coating agent coating apparatus for inorganic material molded bodies according to any one of claims 1 to 3, wherein The air conditioning means includes:
Controlling the humidity inside the closed casing to 20% or more and 70% or less,
The coating agent coating apparatus for inorganic material molded bodies according to any one of claims 1 to 4, characterized in that The air conditioning means includes:
The temperature inside the closed casing is controlled to 25 ° C. or higher and 30 ° C. or lower.
The coating agent coating apparatus for inorganic material molded bodies according to any one of claims 1 to 5, wherein The inorganic material molded body is cylindrical glass,
Inside the closed casing, the cylindrical glass is arranged in a posture in which the cylindrical axis is directed in the up-down direction, and the nozzle is displaced from the lower side upward on the cylindrical axis by the displacement means,
The nozzle sprays the coating agent toward the inner peripheral surface of the cylindrical glass.
The coating agent coating apparatus for inorganic material molded bodies according to any one of claims 1 to 6, wherein An exhaust means for exhausting the internal atmosphere of the closed casing from the upper portion of the closed casing;
The coating agent coating apparatus for inorganic material molded bodies according to any one of claims 1 to 7, wherein A coating agent application method for applying a coating agent to an inorganic material molded body,
The inorganic material molded body,
Housed in a closed enclosure with controlled internal atmosphere,
Inside the closed housing,
Injecting the coating agent from the nozzle toward the inorganic material molded body,
Applying the coating agent to the inorganic material molded body;
A coating agent coating method characterized by that. By the coating agent applied to the inner peripheral surface of the cylindrical glass body,
A coating film is formed only on the inner peripheral surface of the glass body,
A glass body with a coating film characterized by that. By the coating agent applied to the main surface of one side of the plate-like glass body,
A coating film is formed only on one main surface of the glass body,
A glass body with a coating film characterized by that.

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