JPH06142571A - Method and apparatus for cleaning nozzle - Google Patents

Abstract

PURPOSE:To provide an apparatus for cleaning a two-fluid nozzle which is arranged to clean the end of a two-fluid nozzle in a sprayer and in which the deposit of a glaze at the end of the nozzle and the generation of blocking are prevented. CONSTITUTION:In a process in which a glaze is ejected from a two-fluid nozzle 1, cleaning water is dropped appropriately into an air pipe 14 to clean the two-fluid nozzle 1 by discharging moistened air to a glaze ejecting opening, with a water dropping device M placed between the two-fluid nozzle and an air pump 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning a two-fluid nozzle in a spraying device for spraying a glaze on a tile base material and a structure of the cleaning device.

[0002]

2. Description of the Related Art Conventionally, a technique for spraying a glaze on a tile base with a spraying device has been known.
For example, as shown in FIG. 5, the spraying device S ′ is configured to spray the glaze g and the air a from the tip portion 1 a of the two-fluid nozzle 1 to spray and glaze the surface of the tile base material. The glaze g is stored in the glaze tank 2, sucked and discharged by the pump 3 provided with the chamber 5, and the regulator 6 and the flow rate adjusting valve 7 and the pressure gauge 8 installed in the glaze pipe 4 Through the stop valve 9, a constant pressure is applied to the two-fluid nozzle 1, and the air a is sucked and compressed by the air pump 13 (compressor) from the filter 20. It is supplied to the two-fluid nozzle 1 under a constant pressure through the stop valve 19, the regulator 16 and the air filter 11 which are accumulated in the air tank 12 and are interposed in the air pipe 14, and atomize the glaze. It was ejecting in a shape.

[0003]

However, in the above-mentioned prior art, the glaze g adheres to the tip portion 1a of the two-fluid nozzle 1 to cause "clogging", and the "clogging" varies in the ejection amount of the glaze g. Occurs, the glaze cannot be uniformly applied to the surface of the tile base material, uneven glaze is applied, the tile surface after firing becomes uneven, and the quality accuracy varies. Therefore, the present invention is configured so that the tip portion of the two-fluid nozzle of the atomizing device is cleaned, and the glaze does not adhere to the tip portion of the two-fluid nozzle to prevent the occurrence of "clogging". The purpose is to construct a cleaning device.

[0004]

Means for Solving the Problems As means for solving the above problems, according to the present invention, in a structure in which a glaze is sprayed by a two-fluid nozzle, washing water is appropriately dropped into an air pipe to obtain a water-containing air. To discharge the glaze to the glaze outlet to wash the nozzle when the glaze is applied, and a water dropping device is provided between the two-fluid nozzle and the air pump.

[0005]

OPERATION Next, the operation will be described. The fog is applied to the surface of the tile bases TT by the fog applying device S having the two-fluid nozzle 1 for ejecting the glaze g and the air a from the tip portion 1a. In the case of performing air a, the two-fluid nozzle 1
By connecting the water dripping device M to the upward air filter 11 installed in the air pipe 14 for supplying to the air pipe 14, the water w is constantly dripped into the air filter 11 as washing water, and the tip of the two-fluid nozzle 1 is The air a containing water w is blown from the air jet 14a of the portion 1a to the glaze jet 4a, and the glaze jet 4a is sprayed with the air a containing the water w.
The glaze g adhering to is melted and the glaze is applied, and the glaze spout 4a is always washed during the glaze so that clogging does not occur.

[0006]

EXAMPLE An example of the present invention will be described with reference to FIG.
2 is a piping diagram of the fog hanging device S showing an embodiment of the present invention, FIG.
3 is a perspective view showing a glaze outlet 4a and an air jet 14a in the two-fluid nozzle 1, and FIG. 3 is a perspective view showing a state in which the tile base T is sprayed with a glaze g by the two-fluid nozzle 1. 4, FIG.
It is a front view showing a state in which glaze g is sprayed on T ...

An embodiment of the present invention is shown in FIG.
3, the mist applicator S, as shown in FIG. 3, has the two-fluid nozzle 1 that conveys the tile bases T, T ...
Fifteen glazes g and air a are jetted from the tip portion 1a of the two-fluid nozzle 1 onto the surface of the tile base material T · T ... Is configured to do. As shown in FIG. 2, a glaze pipe 4 and an air pipe 14 are provided inside the two-fluid nozzle 1, and a tip portion 1a of the two-fluid nozzle 1 has a glaze outlet 4a of the glaze pipe 4 and an air pipe. Fourteen air ejection ports 14a are arranged close to each other, and the air ejection port 14a is arranged so that the ejection direction is toward the glaze ejection port 4a.

The glaze g is stored in the glaze tank 2, is filtered by the filter 10 in the glaze tank 2 at the time of suction, and is provided with the chamber 5 via the suction pipe 4b (diaphragm pump). 3, is discharged without pulsation, and is supplied into the two-fluid nozzle 1 at a substantially constant pressure via a regulator 6, a flow rate adjusting valve 7, a pressure gauge 8 and a stop valve 9 which are installed in the glaze pipe 4. And is ejected from the glaze ejection port 4a. The glaze g is
Raw materials for glaze and pigments are mixed, water is added, finely ground by a fine pulverizer, pulverized and mixed, stored in a container, and conveyed to a glaze process.

The air a is sucked and compressed by the air pump 13 through the filter 20, accumulated in the air tank 12, and discharged from the air tank 12 under a constant pressure. It is supplied into the two-fluid nozzle 1 via the stop valve 19, the regulator 16 and the air filter 11 which are provided in the pipe 14, and is ejected from the air ejection port 14a. The regulators 6 and 16 can adjust the pressure of the glaze g and the air a so as to obtain a predetermined pressure, and the flow rate adjusting valve 7 sets a predetermined ejection amount of the glaze g. Is configured to be able to.

The air filter 11 installed in the air pipe 14 has the air filter 1
The water pipe 24 of the water dropping device M is connected in a state in which 1 is installed upward. The water dropping device M is configured to constantly drop water w as washing water into the air filter 11 facing upward, and the water w is stored in the water tank 22 and the suction pipe 24b. Is sucked by a pump (aird pump) 23 through the water, and is discharged under a constant pressure applied by the pump 23.
It is dripped into the air filter 11 via the variable throttle valve 27 which is interposed in the air filter 11. The flow rate of the water w can be adjusted by the variable throttle valve 27, and the pressure of the water w can be adjusted by the supply amount of the air a into the air filter 11. It is configured.

With the above structure, the air a containing water w can be blown from the air jet 14a of the tip 1a of the two-fluid nozzle 1 to the glaze jet 4a. Glaze spout 4 with included air a
It is possible to spray the glaze g on the surface of the tile base T while melting the glaze g adhering to a to perform the glaze.
Further, as shown in FIG. 4, by moving the two-fluid nozzle 1, the conveyor belts 1 of the conveyor device provided in a plurality of rows are provided.
It is possible to apply a fog to the surface of the tile bases T, T, ...

Then, the tile bases T, T, ... Glazed by the spraying of the spraying device S are transferred to the firing step via a transfer device or the like and formed into tiles. In addition, in the present embodiment, the water dropping device M is connected to the air filter 11, but is not particularly limited, and at an appropriate position of the air pipe 14 between the two-fluid nozzle 1 and the air pump 13, It suffices if it is a position where water can be dripped into the air pipe 14.

[0013]

Since the present invention is constructed as described above,
The following effects are achieved. That is, since the air containing water can be blown to the tip of the two-fluid nozzle, while melting the glaze adhering to the tip of the two-fluid nozzle with the air containing the water, the glaze is applied to the surface of the tile base material. Since it is possible to apply glaze by spraying, the tip of the two-fluid nozzle can be cleaned during glaze, it is possible to prevent "clogging", eliminate the nozzle cleaning process, and reduce maintenance. It was possible to improve work efficiency. And since there is no deposit on the nozzle, the amount of glaze can be kept constant,
The surface of the tile base can be glazed uniformly. Moreover, since the glaze can be uniformly applied to the surface of the tile base material, unevenness in the application of the glaze can be eliminated, unevenness on the tile surface after firing can be prevented, and quality accuracy can be stabilized.

[Brief description of drawings]

FIG. 1 is a piping diagram of a fog applying device S showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a glaze ejection port 4a and an air ejection port 14a in the two-fluid nozzle 1.

FIG. 3 is a perspective view showing a state in which the tile base material T is sprayed with a glaze g by the two-fluid nozzle 1 to apply the glaze.

FIG. 4 shows a plurality of rows of tile substrates T · T in the two-fluid nozzle
It is a front view showing the state where the glaze g is sprayed on the ...

FIG. 5 is a piping diagram of a fog hanging device S ′ showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Two-fluid nozzle 4 Glaze piping 4a Glaze jet 11 Air 14 Air piping 14a Air jet 22 Water tank 23 Pump 24 Water piping 27 Variable throttle valve M Water dropping device a Air g Glaze w Water

Claims (2)

[Claims] 1. A nozzle cleaning method in which a glaze is sprayed by a two-fluid nozzle, washing water is appropriately dropped into an air pipe, and water containing air is discharged to a glaze jet to wash the nozzle during glaze. Method. 2. A nozzle cleaning apparatus, wherein a water dropping device is provided between the two-fluid nozzle and an air pump in a configuration in which the glaze is sprayed by the two-fluid nozzle.