Electrostatic glaze spraying device

Abstract

The electrostatic glaze spraying device comprises an electrostatic glaze spraying cabinet, an electrostatic rotary cup spraying gun arranged in the electrostatic glaze spraying cabinet and used for spraying glaze on a glaze line of a to-be-glazed body, and a driving mechanism connected with the electrostatic rotary cup spraying gun and used for driving the electrostatic rotary cup spraying gun to move. The electrostatic rotary cup spraying gun comprises a gun barrel and a gun head which are connected with each other and coaxially arranged. An external electric insulation gun sleeve for forming a high-voltage negative electric field is arranged on the gun barrel. The external electric insulation gun sleeve arranged on the gun barrel can prevent or reduce the rebound of the glaze particles with negative electricity, thereby reducing the backflow of the glaze particles to the gun head, the upper part of the gun barrel and the top of the glaze cabinet, preventing electric leakage and glaze dripping, thereby improving the utilization rate of the glaze and reducing the generation of dust.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic production, and in particular to an electrostatic glaze spraying device. BACKGROUND

[0002] At present, the traditional equipment in the building ceramic industry cannot stably and uniformly apply a thin layer of water-based glaze on large-size products. There are technical bottlenecks in the implementation of environmentally friendly water-based electrostatic glaze spraying in the building ceramic industry. In the coating field, water-based coatings have the characteristics of small resistance (usually the resistivity range is less than 1 MΩ·cm) and good electrification, and a special coating isolation system with insulation function must be set up in electrostatic coating. Specifically, there are the following methods for water-based coating to achieve insulation:

[0003] ① Total insulation of the supply system; that is, the robot, pump and tank are all insulated. The main feature is that the equipment investment is large, and the insulation of devices such as gear pumps (motors) is difficult to achieve, so it is less used in actual production.

[0004] ② Directly increase the voltage of the spraying target; that is, increase the positive voltage of the spraying target. The main feature is that the electrostatic capacity is large, dangerous and the particles on the spraying object are attached, so it is not used in actual production.

[0005] ③ External charging method; that is, the voltage of the sprayed coating particles is increased by an external electrode. The main feature is that indirect electrification results in large loss and low coating efficiency.

[0006] ④ Internal charging method; that is, the supply system is physically cut off. The main feature is that the spraying efficiency is relatively high, and there are related applications in actual production.

[0007] The implementation of water-based electrostatic glaze spraying in the building ceramic industry also needs to consider solving the above problems, which is generally much more difficult. On the one hand, due to the small spraying flow in traditional coating applications, the spraying line speed is generally not more than 5 meters / minute, and the number of spinning cups required is small. If calculated per square of glaze, the glaze amount of a single gun is less than 20 grams / square. In the application end of the building ceramic industry, the line speed is usually greater than 20 meters / minute, and the glaze amount of the large-size ceramic plate (1.62 square meters / piece) needs to reach 0-120 grams / square, so 3-6 electrostatic spinning cup guns are needed in the implementation process. Whether it is an internal electrification design or an external electrification design, these high-speed spinning cups are prone to the following situations after spraying for a long time in the glaze cabinet:

[0008] (1) Local airflow rebound caused by spraying airflow to the surface of the body.

[0009] (2) Due to the distance limitation between electrostatic spray guns, different electrostatic atomized particle groups will repel each other, resulting in extremely irregular airflow distribution in the glaze cabinet space. After electrostatic atomization for a period of time, continuous water film will gradually accumulate on the gun rod holder, gun body, connecting wire, glaze cabinet and other components of the electrostatic rotating cup, which will easily cause frequent leakage and loss of static electricity, thereby affecting the atomization effect of the rotating cup, and may also cause local glaze dripping, dirt falling and slag falling due to long-term accumulation.

[0010] (3) The diameter of the atomized particles fluctuates greatly, which affects the uniformity of the sprayed glaze and greatly affects the glazing effect, ultimately leading to abnormal color, layout and performance indicators of the product after firing, and unable to produce normally.

[0011] That is, for electrostatic spraying of large-size products, there are different seasonal weather temperature and humidity environmental conditions, slow drying glaze dripping, fast drying skin powder accumulation and resulting in dirt falling and slag falling defects, and easy leakage problems.

[0012] Therefore, the prior art has defects and needs to be improved and developed. SUMMARY

[0013] The technical problem to be solved by the present application is to provide an electrostatic glaze spraying device to solve the problems of glaze dripping, dirt falling and slag falling, and easy leakage in the prior art when electrostatic spraying is performed on large-size products.

[0014] The technical solution adopted by the present application to solve the technical problem is as follows:

[0015] An electrostatic glaze spraying device, comprising:

[0016] an electrostatic glaze spraying cabinet;

[0017] an electrostatic rotating cup spray gun, disposed in the electrostatic glaze spraying cabinet, for spraying glaze on a glaze line on a glaze body to be applied;

[0018] and a driving mechanism connected with the electrostatic rotating cup spray gun for driving the electrostatic rotating cup spray gun to move;

[0019] Wherein, the electrostatic rotating cup spray gun comprises a gun rod and a gun head connected with each other and coaxially installed, and an external electric insulation sleeve for forming a high-voltage negative electric field is sleeved on the gun rod.

[0020] In an implementation manner, the external electric insulation sleeve comprises:

[0021] an insulation sleeve, sleeved on the gun rod;

[0022] A plurality of external electric needles are arranged on the outside of the insulating gun sleeve and are inclined towards the gun head along the circumference of the insulating gun sleeve, for forming a high-voltage negative electric field.

[0023] In an implementation manner, the external electric needle is a tungsten steel needle.

[0024] In an implementation manner, the electrostatic glaze spraying cabinet comprises an upper cabinet body and a lower cabinet body which are detachably connected, the upper cabinet body is made of insulating plastic, and the lower cabinet body is made of stainless steel.

[0025] In an implementation manner, an insulating waterproof cap is further arranged on the insulating gun sleeve and located above the external electric needle.

[0026] In an implementation manner, the electrostatic glaze spraying device further comprises:

[0027] A glaze recycling tray is arranged in the electrostatic glaze spraying cabinet and used for placing below the glaze line to recycle atomized glaze.

[0028] In an implementation manner, the electrostatic glaze spraying device further comprises:

[0029] A PLC intelligent controller is connected with the electrostatic rotary cup spraying gun and the driving mechanism.

[0030] A high-voltage electrostatic generator is connected with the gun head and the external electric needle and used for electrifying the gun head and the external electric needle.

[0031] In an implementation manner, the electrostatic glaze spraying device further comprises:

[0032] An air compressor is provided with a temperature and humidity adjusting air conditioning control module and a full-automatic cleaning control module, is used for providing a high-pressure air source, and is connected with the electrostatic rotary cup spraying gun.

[0033] In an implementation manner, the electrostatic glaze spraying device further comprises:

[0034] A glaze cabinet dust removal device is connected with the inside of the electrostatic glaze spraying cabinet.

[0035] A glaze cabinet internal pressure adjusting device is connected with the inside of the electrostatic glaze spraying cabinet.

[0036] In an implementation manner, the electrostatic glaze spraying device further comprises:

[0037] A recycling barrel is connected with the glaze recycling tray.

[0038] The electrostatic glaze spraying device provided by the application comprises an electrostatic glaze spraying cabinet, an electrostatic rotary cup spraying gun arranged in the electrostatic glaze spraying cabinet and used for spraying glaze on a glaze line of a to-be-glazed body, and a driving mechanism connected with the electrostatic rotary cup spraying gun and used for driving the electrostatic rotary cup spraying gun to move. The electrostatic rotary cup spraying gun comprises a gun barrel and a gun head which are connected with each other and coaxially arranged, and an external electrically insulated gun sleeve for forming a high-voltage negative electric field is arranged on the gun barrel. Through the structural design and material selection of the electrostatic glaze spraying cabinet, the external electrically insulated gun sleeve design arranged on the gun barrel, the dust removal of the glaze cabinet and the pressure adjustment in the glaze cabinet, the online automatic cleaning of the rotary cup piece and the accumulation of glaze, the distribution, flow direction, quantity, drying and evaporation rate of the atomized water-based glaze film in the spraying gun rotary piece, the gun body and the gun rack connecting mechanism and the space of the glaze spraying cabinet are effectively controlled, the rebound of the glaze particles with negative electricity is prevented or reduced, the glaze particle backflow to the gun head, the upper part of the gun barrel and the top of the glaze cabinet is reduced, the utilization rate of the glaze is improved, the occurrence of dust is reduced, the problems such as the accumulation of glaze in the rotary cup, the dripping of glaze in the glaze cabinet, the falling of dirt and slag and the easy occurrence of electric leakage are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structural schematic view of a preferred embodiment of the electrostatic glaze spraying device in the application.

[0040] Figure 2 is a structural schematic view of the electrostatic rotary cup spraying gun in the preferred embodiment of the electrostatic glaze spraying device in the application.

[0041] Figure 3 is Figure 2 is a sectional view of A:A in the application.

[0042] Figure 4 is a working principle schematic view of the electrostatic rotary cup spraying gun in the preferred embodiment of the electrostatic glaze spraying device in the application.

[0043] Figure 5 is a front view of a second embodiment of the electrostatic glaze spraying device in the application.

[0044] Figure 6 is a top view of the second embodiment of the electrostatic glaze spraying device in the application.

[0045] Figure 7 is a connection schematic view of a plurality of electrostatic rotary cup spraying guns in the preferred embodiment of the electrostatic glaze spraying device in the application.

[0046] Figure 8 is a wind power distribution diagram of the first view of the dust removal of the glaze cabinet and the pressure adjustment in the glaze cabinet in the application.

[0047] Figure 9 is a wind power distribution diagram of the second view of the dust removal of the glaze cabinet and the pressure adjustment in the glaze cabinet in the application.

[0048] Figure 10 is a schematic diagram of three working modes of automatic wet cleaning, automatic cleaning and normal of the rotary cup piece in the application.

[0049] BRIEF DESCRIPTION OF DRAWINGS

[0050] 300, electrostatic rotary cup spray gun; 310, gun barrel; 320, gun head; 321, rotary cup piece; 330, additional electrically insulated gun sleeve; 331, insulated gun sleeve; 332, additional electric needle; 333, insulated waterproof cap; 400, PLC intelligent controller; 500, high-voltage electrostatic generator; 600, electrostatic glaze spraying cabinet; 610, glaze cabinet dust removal device; 620, glaze cabinet internal pressure adjusting device; 700, driving mechanism; 800, air compressor; 900, glaze recycling tray; 910, recycling barrel. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions and advantages of the application clearer and more explicit, the application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0052] In the technical solutions of existing building ceramic base glazing, the implementation of base glazing generally has the following several ways:

[0053] The first way is to use glaze spraying cabinet or high-pressure automatic glaze spraying system for glazing. When glaze spraying cabinet is used for glazing, the atomization capacity and implementation area are very limited, the working specific gravity is generally lower than 1.40, and the maximum green body implementation area is difficult to exceed 800mm*800mm specification, and the glaze flatness is also not ideal. The high-pressure automatic glaze spraying system can be used for large-area glazing of ceramic large plate green body, but the working specific gravity is generally lower than 1.55, and once the glazing amount is less than 300g / square, the glaze flatness will not meet the requirements.

[0054] The second way is to use glaze spraying. The biggest advantage of bell-shaped glaze spraying is that the specific gravity can exceed 1.70, the flatness is good, and the water content in the kiln is relatively low, but it is difficult to implement once the glazing amount is less than 300g / square. Glaze spraying is prone to glaze breaking and branching.

[0055] The third way is to use silk screen flat plate printing or rotary screen printing machine and rubber roller printing machine for glazing. The biggest disadvantage of using these devices is the specification problem, because once the specification exceeds 1.2m, the device precision will be difficult to meet the requirements, and the glaze line production and glazing amount requirements are also greatly limited, and it is difficult to exceed 30m / min line speed, which is prone to many production defects such as net sticking, grid lines, water ripples and the like. The glazing amount per square is difficult to exceed 80g. This process requires higher technical proficiency of the operator, and increases the processing and use links of glaze, as well as the flat plate screen and rubber roller customization links.

[0056] The fourth is to use inkjet printing method to apply glaze, inkjet printing is implemented with digital glaze, which mainly uses oil-based ink, the working specific gravity is less than 1.40, and the single-channel glaze application amount is difficult to exceed 40 g / square, the inkjet ink has high cost due to special requirements for oil-based solvent, additives and ink particle size, and the unit price is generally between 3-12 million / ton; moreover, the inkjet printing has many defects such as dripping glaze and line pulling, and it is difficult to implement large-area and stable implementation.

[0057] Due to many influencing factors involved in the process of high-speed electrostatic spraying of rotary cup, if the influencing factors cannot be reasonably selected and controlled in actual application, the electrostatic spraying quality may be low, and many faults may occur, resulting in a large loss of manpower and material resources.

[0058] When the traditional electrostatic rotary cup sprays quick-drying water-based paint, the water-based electrostatic paint is extremely easy to evaporate quickly at high speed of the electrostatic rotary cup, resulting in cup head skinning and long hair of the rotary cup, which is extremely difficult to clean, thereby causing spraying defects, frequent cleaning, rework and line stop, and greatly affecting the spraying efficiency of customers. The fundamental reason for this phenomenon is that the paint is emitted to the periphery by high-speed centrifugation of the rotary cup, and under the action of atomizing air and forming air, the paint is atomized into very small droplets (micron level) around the rotary cup. Most of the liquid droplets fly to the surface of the object under the action of the electrostatic field. The remaining small part of the liquid droplets will fly around, and some of the liquid droplets will fall on the surface of the rotary cup. The rotary cup atomization and forming compressed air are through the internal pipeline of the gun body, intersecting with the paint thrown out by the rotary cup at the farthest end of the rotary cup, and the compressed air collides with the high-speed rotary cup (usually rotating at 30-40 thousand revolutions per minute) to generate heat. Since the main component of water-based paint is water, the liquid droplets evaporate quickly under the blowing of compressed air (0.1-0.4 mpa), and the remaining part of the paint is adhered to the surface of the rotary cup sheet. The longer the working time, the thicker the paint residue adhered to the surface of the rotary cup sheet.

[0059] Ordinary ceramic water-based glaze generally has a boiling point not higher than 100 degrees, and the above problems are also very easy to occur. Generally, if the speed of the rotary cup exceeds 30,000 revolutions per minute, the rotary cup piece of the spray head may be seriously caked with glaze after actual work for less than half an hour. Under continuous spraying for a long time and at a high glaze application amount, the gun body, connecting flange, glaze cabinet top and other components may also appear skinning, residue falling and dirt falling phenomenon. Therefore, on the one hand, the temperature and humidity in the glaze spraying cabinet need to be controlled, and on the other hand, the characteristics of the water-based glaze formula, the boiling point of the glaze, the atomization effect and the glaze application amount need to be adjusted, which is very difficult for large-scale industrial production.

[0060] In summary, the traditional equipment and process technology means of the building ceramic industry cannot stably and uniformly apply a thin layer of water-based glaze with a specific gravity of 1.20-1.50 and a glaze amount of 0-120 g / m2 on large-size products; meanwhile, there are many technical bottlenecks in the application of electrostatic spraying to the large-scale industrialization of the building ceramic industry, especially for the electrostatic spraying technology for large-size products, which needs to solve the existing problems of slow drying, easy electric leakage, fast drying, glaze accumulation, skin formation, and glaze dropping, reduce production costs, and improve the superior rate.

[0061] Please refer to Figure 1 、 Figure 2 and Figure 3 , the present application provides a kind of electrostatic glaze spraying device, including: electrostatic glaze spraying cabinet 600, electrostatic rotary cup spray gun 300 and drive mechanism 700.The electrostatic rotary cup spray gun 300 is arranged in the electrostatic glaze spraying cabinet 600, for being sprayed glaze to the glaze line on the body to be applied glaze.The drive mechanism 700 is connected with the electrostatic rotary cup spray gun 300, for driving the electrostatic rotary cup spray gun 300 moves.The drive mechanism 700 is arranged as X-Y axis two-way bearing high-speed linear guide rail.

[0062] The electrostatic rotary cup spray gun 300 includes gun barrel 310 and gun head 320 which are connected to each other and coaxially installed, and an external electric insulation sleeve 330 is sleeved on the gun barrel 310 for forming a high-voltage negative electric field.The external electric insulation sleeve 330 is fixedly connected with the gun barrel 310 together, which can achieve the purpose of insulation and prevent electric leakage.In addition, please refer to Figure 4 When the glaze particles carry electric charges through the gun port, they become negatively charged glaze particles, and under the action of the high-voltage electrostatic field, they move towards the body to be applied glaze with opposite polarity.Because the water-based glaze is fully conductive, the negatively charged glaze particles have strong polarity, and will also move towards the upper part of the gun head 320 and the gun barrel 310 and the top of the glaze cabinet, while the external electric insulation sleeve 330 can form a high-voltage negative electric field, and the rebounding negatively charged glaze particles will hit the negative electric field, repel each other, and the glaze particles will fold back to the body to be applied glaze.Therefore, by arranging the external electric insulation sleeve 330 on the gun barrel 310, the present application can prevent or reduce the rebounding of negatively charged glaze particles, thereby reducing the rebounding of glaze particles towards the upper part of the gun head 320 and the gun barrel 310 and the top of the glaze cabinet, preventing electric leakage and glaze dripping, thereby improving the utilization rate of glaze and reducing the occurrence of dust.

[0063] In an implementation manner, the external electric insulation sleeve 330 includes an insulation sleeve 331 and a plurality of external electric needles 332.The insulation sleeve 331 is sleeved on the gun barrel 310, and the plurality of external electric needles 332 are annularly arranged outside the insulation sleeve 331 and inclined towards the gun head 320 along the outer periphery of the insulation sleeve 331, for forming a high-voltage negative electric field.

[0064] Specifically, the insulating gun sleeve 331 is made of insulating Teflon material to reduce the adhesion of glaze. The electrostatic spray gun sleeve is provided with an external electrostatic needle 332, which is connected with the high-voltage line together with the electrostatic rotary cup on the gun head 320. The electrostatic needle 332 and the rotary cup piece 321 are kept at a certain distance to prevent interference of the electric field.

[0065] In an embodiment, the electrostatic needle 332 is a tungsten steel needle. The tungsten steel needle is integrally installed with the insulating gun sleeve 331, and eight tungsten steel needles are uniformly distributed around each gun sleeve. After installation, the external working high voltage is naturally connected with the tungsten steel needle, which mainly plays a role in laying a reinforced external high-voltage negative electric field, which can enhance the downward movement of the electrostatic atomized particles to the brick body, improve the utilization rate of glaze, prevent the atomized glaze particles from rebounding upward to the spray gun and the gun barrel 310, reduce the probability of electrostatic leakage of the top glaze dripping and related connecting components in the glaze cabinet, and improve the utilization rate of glaze.

[0066] In an implementation, the electrostatic glaze spraying cabinet 600 comprises a detachably connected upper cabinet and a lower cabinet. The material of the upper cabinet is insulating plastic, and the material of the lower cabinet is stainless steel. The upper cabinet is selected from a detachable one-piece insulating thickened HDPE plastic and other molding materials. Specifically, the electrostatic glaze spraying cabinet 600 is composed of an upper part and a lower part. The upper part is the upper cabinet, which is selected from a detachable one-piece insulating HDPE plastic and other molding materials. The lower part is the lower cabinet, which is selected from stainless steel materials. The two parts are connected by a clamping groove.

[0067] Please refer to Figure 5 and Figure 6 , the glazing line passes through the inside of the electrostatic glaze spraying cabinet 600, and the glazing body to be glazed runs on the glazing line. In order to prevent excessive dust during spraying, all spray guns and bodies are placed in the electrostatic glaze spraying cabinet 600 during normal operation, and most of the atomized glaze dripping is controlled inside the cabinet for recycling. In order to minimize the influence of the electrostatic glaze spraying cabinet 600 on the electrostatic atomized glaze, six electrostatic rotary cup spray guns 300 are built in the electrostatic glaze spraying cabinet 600, which are arranged in two rows with three in each row. Please refer to Figure 7 .

[0068] The electrostatic rotary cup spray gun 300 is a key point that needs to be protected from leakage. All components connected with the gun body of the electrostatic rotary cup spray gun 300 are selected from high-insulation materials (Land's resistance greater than 1.5GΩ). Since the spray head is connected with a high-voltage negative electrode (voltage range 0-100KV), the glaze is already charged before atomization. The spray gun shell and the glaze supply pipe are made of specially designed high-purity anti-static Teflon material to control the leakage rate within a safe range.

[0069] In an embodiment, the insulating gun sleeve 331 is further provided with an insulating waterproof cap 333, which is located above the external electric needle 332. The insulating waterproof cap 333 is provided with three layers, which can reduce the spread of atomized particles upward and reduce the risk of electric leakage.

[0070] In an implementation, the electrostatic glaze spraying device further comprises a glaze recovery tray 900, which is arranged in the electrostatic glaze spraying cabinet 600 and is used to place below the glaze line to recover the atomized glaze. Due to the spacing between the bodies and the left and right swinging of the spraying gun, part of the glaze cannot fall on the surface of the body during production. In order to prevent waste of glaze, a metal recovery tray is arranged below the glaze line, that is, the glaze recovery tray 900 is a metal recovery tray.

[0071] The glaze recovery tray 900 is grounded to collect most of the atomized glaze and sieve it to the next process, which can enhance the downward movement of electrostatic atomized particles to the body, improve the utilization rate of glaze, prevent the atomized glaze particles from rebounding upward to the spraying gun and the gun rod 310, reduce the risk of electrostatic leakage of the top glaze dripping and related connecting components in the glaze cabinet, and improve the utilization rate of glaze.

[0072] In an implementation, the electrostatic glaze spraying device further comprises a PLC intelligent controller 400 and a high-voltage electrostatic generator 500. The PLC intelligent controller 400 is connected with the electrostatic rotating cup spraying gun 300 and the driving mechanism 700. The high-voltage electrostatic generator 500 is connected with the gun head 320 and the external electric needle 332 to charge the gun head 320 and the external electric needle 332.

[0073] In an implementation, the electrostatic glaze spraying device further comprises an air compressor 800, which is connected with the electrostatic rotating cup spraying gun 300 to provide high-pressure air. The air compressor 800 is specifically a stable pressure air source with a temperature and humidity air conditioning control function module, a full-automatic cleaning control function module device.

[0074] In an embodiment, as shown in Figure 8 and Figure 9 The electrostatic glaze spraying device further comprises a glaze cabinet dust removal device 610 and a glaze cabinet internal pressure adjusting device 620. The glaze cabinet dust removal device 610 is connected with the interior of the electrostatic glaze spraying cabinet 600. The glaze cabinet internal pressure adjusting device 620 is connected with the interior of the electrostatic glaze spraying cabinet 600. The glaze cabinet internal pressure adjusting device 620 can realize the airflow distribution of the glaze cabinet, which is balanced from top to bottom in four port steps. The glaze cabinet dust removal device 610 further recovers the glaze dust in the glaze cabinet, which is conducive to the overall flow of electrostatic atomized particles to the working components, reduces airflow rebound, and ensures to reduce the production process defects such as glaze dripping, dirt falling, leakage and the like.

[0075] In an implementation mode, the electrostatic glaze spraying device further comprises a recovery bucket 910 in communication with the glaze recovery tray 900. The screened glaze is stored in the recovery bucket 910, and due to the loss of moisture during the spraying process, the glaze needs to be re-proportioned for reuse, which can greatly reduce the loss of glaze.

[0076] The electrostatic rotary cup spray gun 300 is an internal power electrostatic spray gun, and the external connection includes a control circuit, a high-voltage circuit, an air hose, and a glaze slurry hose. The air hose has several groups of functional modules such as atomizing air, rotary cup air, and shaping air. Each module is communicated with a stable pressure air source with a temperature and humidity air conditioning control function and a full-automatic cleaning control function module device to realize the adjustment of each function and technical requirement.

[0077] As shown in Figure 10 The atomizing air module and the shaping air module can be set to a full-automatic boiling point adjusting agent filling mode, a full-automatic deionized water cleaning mode, and an adjustable pressure, temperature, and humidity air pressure mode through an electronic valve setting program, and can be switched between corresponding rotary cup piece glaze automatic wetting cleaning, full-automatic cleaning, and normal three working modes to realize online full-automatic cleaning of the rotary cup piece glaze.

[0078] In summary, the electrostatic glaze spraying device disclosed by the application comprises an electrostatic glaze spraying cabinet, an electrostatic rotary cup spray gun arranged in the electrostatic glaze spraying cabinet and used for spraying glaze on a to-be-glazed body on a glaze line, and a driving mechanism connected with the electrostatic rotary cup spray gun and used for driving the electrostatic rotary cup spray gun to move.

[0079] The application realizes online full-automatic cleaning of the rotary cup piece glaze through the structural design and material selection of the electrostatic glaze spraying cabinet, the setting of the external electric insulation sleeve and the negative electric needle on the gun barrel for strengthening the anti-rebound effect, the dust removal of the glaze cabinet and the adjustment of the air source design of the glaze cabinet, the temperature and humidity air conditioning control, the full-automatic cleaning control, and other functional modules, effectively controls the distribution, flow direction, quantity, drying and evaporation rate of the atomized water-based glaze film in the spray gun rotary piece, the gun body and gun rack connection mechanism, and each space of the glaze spraying cabinet, improves the utilization rate of the glaze, reduces the occurrence of dust, solves the industry technical problems of rotary cup glaze accumulation, glaze dripping, dirt falling and easy electric leakage in the traditional water-based electrostatic spraying industry applied to the building ceramic field, realizes the industrialization application effect of the electrostatic glaze spraying technology in the building ceramic industry for the first time, and solves the industry bottleneck that the traditional glaze application equipment is difficult to uniformly and stably implement 0-120 grams / square water-based glaze.

[0080] It is to be understood that the application is not limited to the examples described above, which can be modified or adapted in several ways by those skilled in the art without departing from the scope of the present application, as defined by the appended claims.

Claims

1. An electrostatic glaze spraying apparatus characterized by comprising: The application relates to an electrostatic glaze spraying device. The electrostatic glaze spraying device comprises an electrostatic glaze spraying cabinet, an electrostatic rotary cup spraying gun arranged in the electrostatic glaze spraying cabinet and used for spraying glaze on a glaze line, and a driving mechanism connected with the electrostatic rotary cup spraying gun and used for driving the electrostatic rotary cup spraying gun to move. The electrostatic rotary cup spraying gun comprises a gun barrel and a gun head which are connected with each other and coaxially arranged, and an external electric insulation sleeve is arranged on the gun barrel and used for forming a high-voltage negative electric field. The external electric insulation sleeve comprises an insulation sleeve arranged on the gun barrel and a plurality of external electric needles which are annularly arranged outside the insulation sleeve and are inclined towards the gun head along the outer periphery of the insulation sleeve. The external electric needles are tungsten steel needles. The electrostatic glaze spraying cabinet comprises an upper cabinet body and a lower cabinet body which are detachably connected, the upper cabinet body is made of insulating plastic, and the lower cabinet body is made of stainless steel. An insulating waterproof cap is further arranged on the insulation sleeve and located above the external electric needles. The electrostatic glaze spraying device further comprises a glaze recovery tray arranged in the electrostatic glaze spraying cabinet and used for placing below the glaze line to recover atomized glaze.

2. The electrostatic glaze spraying apparatus according to claim 1, wherein The electrostatic glaze spraying device further comprises a PLC intelligent controller connected with the electrostatic rotary cup spraying gun and the driving mechanism, a high-voltage electrostatic generator connected with the gun head and the external electric needles and used for electrifying the gun head and the external electric needles, an air compressor provided with a temperature and humidity adjusting air conditioning control module and a full-automatic cleaning control module, an air cabinet dust removal device and an air cabinet internal pressure adjusting device.

3. The electrostatic glaze spraying apparatus according to claim 1, wherein The electrostatic glaze spraying device further comprises a recovery barrel connected with the glaze recovery tray.

4. The electrostatic glaze spraying apparatus according to claim 1, wherein ​ 5. The electrostatic glaze spraying apparatus according to claim 1, wherein ​ ​ 6. The electrostatic glaze spraying apparatus according to claim 1, wherein ​ ​ ​ 7. The electrostatic glaze application device of claim 1, wherein ​ ​ 8. The electrostatic glaze application device of claim 1, wherein, ​ ​ ​ 9. The electrostatic glaze spraying apparatus according to claim 5, wherein ​ ​

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