JPH0361506B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a glaze applicator for uniformly applying glaze to tiles.

[Prior Art] FIGS. 3 to 5 show a conventional glazing device 1. In this device 1, an air nozzle 3 is arranged above a glaze nozzle 2, and the tapered discharge ports of these nozzles 2 and 3 are brought close to each other. Both nozzles 2 and 3 are set as one set, and a plurality of sets are provided. Each nozzle 2 and 3 has a manifold structure branched from a supply pipe 4 communicating with a supply source of glaze and a supply pipe 5 communicating with a supply source of compressed air. Such an applicator 1 is, of course, placed in a closed glazing booth (not shown) to prevent the glaze from scattering to the outside during glazing. The glazing method of the device 1 is to atomize the glaze discharged from the glaze nozzle 2 with compressed air from the air nozzle 3 and blow it downward, thereby applying the glaze to the tile surface on the conveying device disposed below the device 1. It is used to glaze.

[Problem to be solved by the invention]

Therefore, in the case of the conventional glaze nozzle 2,
As shown in FIG. 6, glaze and impurities adhered and grew on the tapered portion of the tip on the inside, and glaze sometimes adhered and grew on the tapered portion of the tip on the outside. The above-mentioned adhesion to the inside is caused by the fact that the glaze has a certain degree of viscosity, which makes it more likely to adhere due to the wall resistance of the tapered part, and that the glaze contains impurities that have passed through the filter. be. In addition, adhesion to the outside is caused by convection of the sprayed fluid within the glazing booth (see the chain line in Figure 6), and due to this convection, the mist glaze floating in the glazing booth sequentially adheres to the glaze nozzle 2 and dries. This is because the glaze discharged from the glaze nozzle 2 is pushed back by compressed air, dries and grows.

If the glaze or the like adheres to and grows on the inner and outer surfaces of the discharge port of the glaze nozzle 2 in this way, the opening area will be reduced, resulting in a drawback that the amount of glaze applied will change over time. In other words, uniform coating could not be performed between each tile.

Therefore, in the past, the glaze adhering to the outside of the glaze nozzle 2 had to be manually cleaned with a brush or the like after every 15 minutes of glazing work in which the change in the amount of glaze applied did not exceed the allowable range. Nakatsuta.
Further, the glaze adhering to the inside of the glaze nozzle 2 had to be manually cleaned with a wire or the like after every hour of glazing work.

[Means to solve the problem]

The present invention improves and eliminates the above-mentioned drawbacks of the conventional technology, and eliminates the adhesion and growth of glaze, etc. on the discharge port, and also enables instant switching between coating and cleaning operations simply by operating a switching valve. Moreover, it is an object of the present invention to provide a device that can perform this process automatically.

Therefore, the means adopted by the present invention to solve the above problem includes a nozzle chip having a discharging port for internal fluid such as glaze or cleaning water on the tip surface and a spiral groove formed on the outer circumferential surface; an applicator body that is fitted onto the distal end of the nozzle tip and has a cavity on the rear end that communicates with the spiral groove; and a distal end portion of the applicator body that is fitted onto the outer periphery of the distal end of the applicator body. a cleaning cover having an annular groove formed therebetween, an inlet for cleaning water at an appropriate position on the side surface, and an outlet for cleaning water at a portion corresponding to the outlet of the nozzle tip; a flow path that is fitted externally and internally into a side wall of the cavity of the applicator body and communicates with the internal fluid flow path of the nozzle tip; and a compressed air flow path that communicates with the cavity of the applicator body. It has two fluid inlets and two outlet ports for two kinds of fluids, such as glaze and cleaning water, and has a spool in the internal fluid chamber, and one outlet is for the fluid intake. This coating device is characterized by comprising a switching valve that is communicated with a flow path of the container and whose other outlet is communicated with the wash water inlet of the wash cover.

[Effect]

The glaze etc. discharged from the discharge port of the nozzle tip is prevented from scattering to the surroundings by compressed air discharged spirally from the annular groove around the glaze. By switching the spool of the switching valve from this application state, it is possible to instantly switch and supply the cleaning water to both the channels formed inside and outside the nozzle tip, making it extremely easy to clean the inside and outside surfaces of the nozzle tip. It is possible to clean automatically. In addition, this spool switching operation can be performed instantly and automatically using a solenoid, etc.
Extremely easy to control.

〔Example〕

Next, the configuration of the present invention will be explained based on specific embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional view showing a coating device 10 of the present invention. In the same figure, 11 is a coating nozzle;
2 is a switching valve. The application nozzle 11 is composed of a nozzle tip 13, an applicator body 14, a cleaning cover 15, and a fluid intake device 16. The nozzle tip 13 has a discharge port 17 for internal fluid such as glaze or cleaning water on the tip surface, and a spiral groove 18 on the outer peripheral surface.
(See Figure 2). The applicator body 14 is
The nozzle tip 13 is externally fitted on the distal end side and has a hollow portion 19 on the rear end side that communicates with the spiral groove 18. The cleaning cover 15 is fitted onto the outer periphery of the distal end side of the applicator main body 14, and forms an annular groove 20 between the cleaning cover 15 and the distal end portion of the applicator main body 14. An inlet 21 for cleaning water is provided at a suitable location on the side surface, and an outlet 22 is provided at a portion corresponding to the outlet 17 of the nozzle tip 13.

Although two inlets 21 of the washing water are shown on the left and right sides in FIG. 1, in reality, four inlets 21 are formed at equal intervals around the entire circumference. Since the annular groove 20 acts as a pressure chamber, even one annular groove 20 is sufficient. The reason why four holes are provided is to allow the cleaning water to flow more uniformly to the outlet 22 from the entire circumferential direction.

The fluid intake device 16 is fitted externally to the rear end side of the nozzle tip 13 and internally fitted into the side wall of the cavity 19 of the applicator body 14.
3, and a compressed air flow path 25 that communicates with the cavity 19 of the applicator body 14. Although two compressed air flow paths 25 are shown on the left and right sides in FIG. 1, there are actually four compressed air flow paths 25 formed at equal intervals around the entire circumference. In this case, the annular passage 25a and the cavity 19 that communicate the passage 25 and the cavity 19 function as a pressure chamber, so even if there is only one passage 25, the compressed air is uniformly distributed to each spiral groove 18. It is something that flows. The reason for providing four inlets is the same as in the case of the inlet 21 described above.

On the other hand, the switching valve 12 is composed of external and internal casings 26 and 27, a lid member 28, and a spool 30 slidably disposed in a fluid chamber 29 within the internal casing 27. External casing 26
is an inlet 31 for two types of fluids such as glaze and washing water,
32 and outflow ports 33 and 34. The outflow port 33 is connected to the flow path 24 of the fluid intake device 16 of the application nozzle 11 by screw fitting or the like, and the outflow port 34 is connected to the inflow port 21 of the cleaning cover 15 by piping (not shown) or the like. It is connected. Inner casing 27 has inlet ports 35, 36 and outlet ports 37, 38, 39. The spool 30 is provided in the fluid chamber 29 and controls the opening and closing of these ports 35 to 39 to supply or cut off the supply of glaze or cleaning water to the application nozzle 11. In this embodiment, the movement of the spool 30 is turned on and off at predetermined intervals by a timer device.
A solenoid (none shown) that is turned off;
This is done by moving the valve shaft 40 left and right.

Note that, as in the conventional case, the above-described coating device 10 is placed and used in a glazing booth (not shown).

Next, the operation mode of the coating nozzle and coating device of the present invention will be explained based on the above-mentioned embodiments. Note that the two types of fluids here are glaze and cleaning water.

First, the glaze application operation by the application device 10 will be explained. In this case, the valve shaft 40 of the spool 30 is moved to the left in FIG. 1 by switching the solenoid, and the spool 30 is moved from the position indicated by the chain line to the position indicated by the solid line in the figure. As a result, the inflow port 36 and the outflow port 38 of the inner casing 27 are closed. In this state, glaze is supplied to the inlet 31 of the switching valve 12, and compressed air is supplied to the flow path 25 of the coating nozzle 11 from a compressed air supply source such as an air compressor. The glaze flows from the inlet 31 through the inlet port 35 of the inner casing 27 into the fluid chamber 29 and from the outlet port 37 to the outlet 33 of the outer casing 26 . Then, the flow paths 24 and 23 of the coating nozzle 11
The liquid is then discharged from the discharge port 17 of the nozzle chip 13. On the other hand, the compressed air supplied to the flow path 25 flows from the cavity 19 of the applicator body 14 into the spiral groove 18 of the nozzle tip 13 and
The liquid is ejected spirally from the nozzle opening 42 through the annular passage 41 between the outer circumferential surface of the tip and the inner circumferential surface of the tip of the applicator body 14 .

The glaze discharged from the discharge port 17 of the nozzle tip 13 is in the form of mist;
In step 2, the powder is pulverized by compressed air that is ejected in a spiral manner, and the particles are further made finer and ejected in a spiral manner. By spirally mixing the atomized glaze, a uniform mixed state can be obtained, and it is possible to apply the glaze more uniformly than in the past. In addition, the nozzle tip 13 of the coating nozzle 11
As described above, the applicator body 14 is disposed on the outer periphery of the applicator body 14, from which compressed air is blown out, and the cleaning cover 15 is disposed on the outer periphery of the applicator body 14. For this reason, it is impossible for the atomized glaze convecting in the glazing booth (not shown) to directly adhere to and grow on the outer peripheral surface of the nozzle tip 13.

By the way, the application range of the atomized glaze ejected from the application nozzle 11 can be enlarged or reduced by changing the inclination angle of the spiral groove 18 of the nozzle tip 13. Further, the amount of application can be changed by increasing or decreasing the number of discharge ports 17 of the nozzle chip 13. These changes in the coating range and coating amount can be easily carried out by preparing in advance a product with a different inclination angle of the spiral groove 18 and a different number of discharge ports 17.

Next, the cleaning operation of the coating device 10 will be explained. In this case, switch the solenoid to move the valve shaft 40 to the right in FIG.
is moved from the position indicated by the solid line to the position indicated by the chain line in the figure. In this chain line state, the inner casing 2
The inflow port 35 of No. 7 is closed, and the inflow port 36
and the outflow port 38 is opened. In other words, the supply of glaze to the fluid chamber 29 is cut off, and cleaning water is supplied to the fluid chamber 29 instead. Fluid chamber 29
The cleaning water supplied to the is supplied from the outflow port 38 to the outflow port 33 of the outer casing 26, and from the outflow port 39 to the outflow port 3 of the outer casing 26.
4. The cleaning water supplied to the outlet 33 passes through the channels 24 and 23 of the coating nozzle 11 to reach the nozzle tip 13, and is discharged from the outlet 17. At this time, the cleaning water is for cleaning the inside of the nozzle tip 13. Further, the cleaning water supplied to the outlet 34 of the switching valve 12 is sent to the inlet 21 of the cleaning cover 15 via piping or the like. Then, it is discharged from the annular groove 20 through the outlet 22. At this time, the cleaning water is supplied to the nozzle tip 13.
and the outer peripheral surface of the applicator body 14.

By the way, compressed air is always supplied to the flow path 25, and the nozzle tip 13 and the applicator body 1
Compressed air is blown out in a spiral from an annular passage 41 between the two. This is the same even during the above-mentioned cleaning. Therefore, the inside and tip surface of the nozzle tip 13 and the applicator body 14 are
The cleaning water that cleans the outer circumferential surface of the nozzle opening 42 is agitated by the compressed air that is jetted out in a spiral shape, becomes spiral, and efficiently cleans the nozzle opening 42.
This is because the cleaning water flowing from the inlet 21 of the cleaning cover 15 to the outlet 20 is combined with the cleaning water discharged from the discharge port 17 of the nozzle tip 13 and the compressed air jetted from between the nozzle tip 13 and the applicator body. This is because it is supplied in a direction that blocks the flow. Of course, during this cleaning, objects to be coated, such as tiles, are not supplied below the coating device 10.

In this embodiment, the above-mentioned coating operation and cleaning operation can be performed automatically by switching the solenoid to move the spool 30 to the position indicated by the chain line and the position indicated by the solid line in FIG. Moreover, since it is automatic cleaning, it can be done in a shorter time than conventional manual cleaning, which improves productivity.
In addition, since the inside and outside of the nozzle tip 13 can be efficiently and automatically cleaned, there is little change in the amount of glaze applied due to adhesion and growth, and uniform application can be achieved.

Note that the coating device of the present invention is not limited to that of the above-mentioned embodiments, and can be modified as appropriate. In addition to being used alone, this device can be arranged in parallel and used in multiple units at the same time.

〔Effect of the invention〕

As explained above, in the coating device of the present invention, it is possible to automatically clean the inside and outside of the nozzle tip, and this can be done in a shorter time than conventional manual cleaning. in addition,
Cleaning is done by swirling the cleaning water in a spiral pattern, resulting in excellent cleaning effects. Furthermore, since the time required for cleaning is short and efficient cleaning can be performed, the number of cleanings can be increased, and the degree of adhesion and growth of coating fluid such as glaze on the inside and tip surface of the nozzle tip is reduced. In other words, it has little influence on the amount of application, and there is little variation in the amount of application that changes over time.

In addition, in the coating device of the present invention,
The coating amount and coating range can be easily changed. Moreover, the coating fluid such as glaze discharged in the form of mist is spouted out in a spiral manner, so that uniform mixing of the coating fluid can be achieved and uniform coating can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the coating device according to the present invention, FIG. 2 is a perspective view showing the nozzle tip, FIGS. 3 to 6 are related to a conventional glazing device, and FIG. 4 is a plan view, FIG. 5 is a front view, and FIG. 6 is an enlarged sectional view of the glaze nozzle and air nozzle of the same device. 17... Discharge port, 18... Spiral groove, 13... Nozzle tip, 19... Cavity, 14... Applicator body, 20... Annular groove, 21... Cleaning water inlet, 2
2...Fluid water outlet, 15...Cleaning cover, 16
...Fluid intake device, 31, 32...Inflow port, 33,
34...Outlet, 29...Fluid chamber, 30...Spool, 12...Switching valve.

Claims (1)

[Claims] 1. A nozzle chip having a discharge port for internal fluid such as glaze or cleaning water on the tip side and a spiral groove formed on the outer circumferential side surface, and a nozzle tip that is fitted on the tip side of the nozzle tip and connected to the spiral groove on the rear end side. An annular groove is formed between an applicator main body having a communicating cavity and a distal end portion of the applicator main body that is fitted onto the outer periphery of the distal end side of the applicator main body, and a circular groove is formed between the applicator main body and the distal end portion of the applicator main body. a cleaning cover provided on the inflow port and the outflow port in a portion corresponding to the discharge port of the nozzle tip; and a cleaning cover that is fitted externally to the rear end side of the nozzle tip and internally fitted into the side wall of the cavity of the applicator body; A fluid intake device comprising a flow path communicating with the internal fluid flow path of the nozzle tip and a compressed air flow path communicating with the cavity of the applicator body; It has two inflow ports and two outflow ports, and a spool is provided in the internal fluid chamber, one of the outflow ports communicates with the flow path of the fluid intake device, and the other outflow port communicates with the flow path of the cleaning cover. A coating device characterized by comprising a switching valve communicating with a water inlet.