Automatic spraying device for casting mold surface coating

Abstract

The invention relates to an automatic spraying device for a casting mold surface coating, belongs to the technical field of casting, and solves the problems of non-uniform mixing of casting mold spraying paint and incomplete cleaning of a spray head in the prior art. The device comprises a bottom plate, a feeding mechanism, a movement mechanism, an injection mechanism and a control mechanism, the bottom plate is arranged at the bottom of the device and used for supporting the whole device. The feeding mechanism is used for supplying materials to the injection mechanism and comprises a charging barrel assembly, a stirring structure and a conveying pipe; the movement mechanism is used for conveying the spraying mechanism to a required position; the spraying mechanism is arranged on the movement mechanism and used for implementing spraying operation; the spraying mechanism comprises a nozzle; the conveying pipe is connected with the charging barrel assembly and the nozzle; and the feeding mechanism, the movement mechanism and the injection mechanism are electrically connected with the control mechanism. Automatic spraying of the surface of the casting mold can be achieved, coating mixing is uniform, and the spraying head is thoroughly cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to an automatic spraying device for a casting mold surface coating. Background Art

[0002] In the prior art, when spraying the mold surface, uneven mixing of the coating may occur, resulting in poor spraying effect, and incomplete cleaning of the nozzle may cause blockage inside the nozzle, thus affecting the use. Summary of the invention

[0003] In view of the above analysis, an embodiment of the present invention aims to provide an automatic spraying device for casting surface coating, so as to solve the problems of uneven mixing of casting spray coating and incomplete cleaning of the nozzle in the prior art.

[0004] The purpose of the present invention is mainly achieved through the following technical solutions:

[0005] One aspect of the present invention provides an automatic spraying device for a casting surface coating, comprising a bottom plate, a feeding mechanism, a movement mechanism, a spraying mechanism and a control mechanism; the bottom plate is arranged at the bottom of the device to support the entire device;

[0006] The feeding mechanism is used to feed the injection mechanism, and includes a barrel assembly, a stirring structure and a feeding pipe;

[0007] The motion mechanism is used to transport the injection mechanism to a desired position;

[0008] The spraying mechanism is arranged on the motion mechanism, and the spraying mechanism is used to implement the spraying operation;

[0009] The feed pipe connects the barrel assembly and the injection mechanism;

[0010] The feeding mechanism, the moving mechanism and the ejecting mechanism are electrically connected to the control mechanism.

[0011] Furthermore, the barrel assembly includes a powder barrel, a liquid barrel and a mixing barrel; the material in the powder barrel and the liquid in the liquid barrel are respectively fed into the mixing barrel in proportion to be stirred and mixed, so as to supply the injection mechanism.

[0012] Furthermore, the stirring structure includes a first stirring structure, which is arranged at the lower part of the mixing barrel; the first stirring structure includes a first motor, a first rotating shaft and blades.

[0013] Furthermore, the blades are arranged at different heights on the first rotating shaft.

[0014] Furthermore, the motion mechanism includes an X-axis structure, a Y-axis structure and a Z-axis structure.

[0015] Furthermore, the spray mechanism includes a spray head; the spray head includes a first spray head and a second spray head; the diameter of the first spray head is larger than that of the second spray head.

[0016] Furthermore, the spraying mechanism also includes a connecting seat and a rotating seat; the first nozzle is arranged at the lower part of the rotating seat, and the second nozzle is arranged at one side of the rotating seat; the first nozzle and the second nozzle can rotate with the rotating seat.

[0017] Furthermore, it also includes a three-dimensional scanning and measuring system, which is used to scan the shape of the casting mold and analyze the complexity of different areas of the casting mold and the demand for coating.

[0018] Furthermore, it also includes a cleaning mechanism, which includes a liquid inlet pipe arranged at the upper part of the mixing cylinder and a liquid outlet pipe arranged at the lower part of the mixing cylinder.

[0019] Another aspect of the present invention provides an automatic spraying method for a casting surface coating, and an automatic spraying device for the casting surface coating.

[0020] Furthermore, the stirring structure further comprises a second stirring structure, wherein the second stirring structure comprises a second motor, a second rotating shaft and a vortex stirring blade;

[0021] The vortex stirring blade is sleeved on the second rotating shaft and can rotate and rise and fall along with the second rotating shaft; the vortex stirring blade is used for stirring the mixture in the middle of the mixing cylinder.

[0022] Furthermore, the second stirring structure further comprises a first rotating frame; the first rotating frame is used to stir the mixture near the wall of the mixing barrel; the first rotating frame is sleeved on the second rotating shaft, and the first rotating frame can rotate and rise and fall with the second rotating shaft;

[0023] The first rotating frame is longitudinally provided with a first stirring column, and the axis of the first stirring column is perpendicular to the axis of the second rotating shaft.

[0024] Furthermore, the stirring structure further comprises a third stirring structure, and the third stirring structure comprises a third motor, a third rotating shaft, a second rotating frame and a second stirring column;

[0025] The second rotating frame is arranged on the third rotating shaft and can rotate along with the third rotating shaft; the second rotating frame is longitudinally provided with a second stirring column, and the axis of the second stirring column is parallel to the axis of the first stirring column;

[0026] The second rotating shaft and the third rotating shaft rotate in opposite directions.

[0027] Furthermore, a sawtooth portion is disposed on the outside of the second rotating frame, and the sawtooth portion is used to peel off objects attached to the wall surface; the sawtooth portion has a first side and a second side, and an inclination angle between the first side and the wall surface of the mixing cylinder is greater than that of the second side.

[0028] Furthermore, the cleaning mechanism further comprises a cleaning assembly, and the cleaning assembly comprises a fourth motor, a fourth rotating shaft, a first sleeve, a second sleeve and a third sleeve;

[0029] The first sleeve is fixedly arranged on the connecting seat, the second sleeve can be retracted into the first sleeve, and the third sleeve can be retracted into the second sleeve.

[0030] Furthermore, the third sleeve is provided with a Venturi tube, and the outside of the third sleeve is provided with a spiral brush structure.

[0031] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0032] (1) The present invention uses a motion mechanism to transport the nozzle to a certain position, and feeds the nozzle with material through a feeding structure to perform spraying; the operations of the feeding mechanism, the motion mechanism and the spraying mechanism are uniformly controlled by a control mechanism to achieve automatic spraying.

[0033] (2) The present invention has two nozzles, including a first nozzle and a second nozzle. The first nozzle is used for ordinary spraying, and the second nozzle is used for slender deep cavities and narrow slit structures. A slender nozzle can be selected to spray deeply inside. The first nozzle is set at the bottom of the rotating seat, and the second nozzle is set at the side of the rotating seat. The rotating seat can rotate around its own axis, and the directions of the two nozzles can rotate with the rotating seat, which can be selected according to the spraying needs.

[0034] (3) The motion mechanism of the present invention is used to transport the spray assembly to the required position of the workpiece for spraying. In order to ensure that the nozzle can be accurately positioned, the motion mechanism of the present invention adopts a three-axis coordinate system, which is electrically connected to the control mechanism and uniformly controlled by the control mechanism. The motion mechanism includes an X-axis structure, a Y-axis structure, and a Z-axis structure.

[0035] (4) The present invention provides a three-dimensional scanning measurement system for scanning the mold shape and analyzing the complexity of different areas of the mold and the demand for coatings.

[0036] (5) The present invention is provided with a vortex stirring blade, and the spiral structure of the vortex stirring blade can produce axial and radial mixing effects when rotating. During stirring, the spiral stirring blade can lift the mixture from the bottom to the top, and at the same time mix it in the circumferential direction, effectively avoiding the formation of dead zones.

[0037] (6) Compared with the prior art in which the stirring blades are fixed in height, the vortex stirring blades and the rotating bracket in the second stirring structure of the present invention can rotate and rise and fall, thereby achieving a liquid mixing effect at the same height and fully stirring and mixing the mixture of the upper and lower liquid layers, thereby improving the stirring effect.

[0038] (7) Compared with the prior art in which a stirring structure is only provided at the center of the barrel, the present invention provides a first rotating frame and a second rotating frame near the wall surface, and each of the first rotating frame and the second rotating frame is provided with a first stirring column and a second stirring column. The first stirring column and the second stirring column are arranged relative to each other, and the stirring columns rotate in different directions, so that the vortices formed by the stirring between the first stirring column and the second stirring column collide with each other and mix synergistically, so that the materials are mixed together faster and more evenly, thereby improving the stirring effect of the mixture at the wall surface. A serration is provided on the outer side of the second rotating frame near the wall surface. The two sides of the serration have different inclination angles, so that after scraping off the attachments on one side, it can flow out from the other side and enter the mixture, thereby reducing residues, uneven mixing and agglomeration; the present invention is provided with a second stirring structure and a third stirring structure to cooperate with each other. The second stirring structure is arranged from bottom to top, and the third stirring structure is arranged from top to bottom, so as to jointly complete the mixing and stirring of the mixing barrel.

[0039] (8) Compared with the prior art, the present invention provides a nozzle cleaning mechanism with a telescopic structure. During the spraying operation, the fixed first sleeve is retracted to prevent interference with the spraying operation; after the spraying operation, the first sleeve is extended to clean the nozzle. The third sleeve nozzle is provided with a Venturi tube structure and an air filling port for filling with compressed air. The combined action of the Venturi tube and compressed air allows the nozzle to be cleaned more thoroughly. The outer peripheral wall of the third sleeve is provided with a brush with a spiral structure. When the fourth shaft rotates, the brush will unscrew the paint that has not been thoroughly washed off the inner wall of the nozzle, so that the nozzle can be cleaned more thoroughly.

[0040] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0042] Figure 1 It is a structural schematic diagram of the automatic spraying device of Example 1;

[0043] Figure 2It is a structural schematic diagram of the barrel assembly and the cleaning mechanism of Example 1;

[0044] Figure 3 This is a schematic structural diagram of the first stirring structure of Example 1;

[0045] Figure 4 Schematic diagram of the Z-axis structure of Example 1;

[0046] Figure 5 is a schematic structural diagram of the X-axis structure of Example 1;

[0047] Figure 6 It is a structural schematic diagram of the Y-axis structure of Example 1;

[0048] Figure 7 Schematic diagram of the nozzle structure of Example 1;

[0049] Figure 8 is a structural schematic diagram of a second stirring structure of Example 2;

[0050] Fig. 9 is a structural schematic diagram of the sawtooth structure of Example 2;

[0051] Fig.10 Schematic diagram of the structure of the nozzle of Example 2.

[0052] Reference numerals:

[0053] 1-bottom plate, 2-feeding mechanism, 21-barrel assembly, 211-powder barrel, 212-liquid barrel, 213-mixing barrel, 22-air compressor, 23-stirring structure, 231-first stirring structure, 2311-first motor, 2312-first rotating shaft, 2313-blade, 232-second stirring structure, 2321-second motor, 2322-second rotating shaft, 2323-vortex stirring blade, 2324-first rotating frame, 2325-first stirring column, 233-third stirring structure, 2331-third motor, 2332-third rotating shaft, 2333-second rotating frame, 2334-second stirring column, 2335-sawtooth portion, 24-feeding pipe, 3-motion mechanism, 31-X-axis structure, 311-X-axis beam, 312-X-axis drive motor, 313-X-axis slider, 32-Y-axis structure, 321-Y-axis crossbeam, 322-Y-axis drive motor, 323-Y-axis slider, 33-Z-axis structure, 331-Z-axis guide column, 332-Z-axis drive motor, 333-Z-axis slider, 4-injection mechanism, 41-nozzle, 411-first nozzle, 412-second nozzle, 42-rotating seat, 43-connecting seat, 44-positioning probe, 5-control mechanism, 6-three-dimensional scanning measurement system, 7-cleaning mechanism, 71-liquid inlet pipe, 72-liquid outlet pipe, 73-cleaning assembly, 731-fourth motor, 732-fourth rotating shaft, 733-first sleeve, 734-second sleeve, 7341-feed pipe mouth, 7342-liquid outlet pipe mouth, 7343-inflating port, 735-third sleeve, 7351-Venturi tube, 7352-conical tube, 7353-brush. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0055] Example 1

[0056] A specific embodiment of the present invention, as Figure 1 As shown, an automatic spraying device for a mold surface is disclosed, comprising a base plate 1, a feeding mechanism 2, a moving mechanism 3, a spraying mechanism 4 and a control mechanism 5. The feeding mechanism 2, the moving mechanism 3 and the spraying mechanism 4 are all electrically connected to the control mechanism 5.

[0057] The bottom plate 1 is arranged at the bottom of the device to support the entire device.

[0058] like Figure 2 As shown, the feeding mechanism 2 is used to feed the injection mechanism 4, and includes a barrel assembly 21, an air compressor 22, a stirring structure 23 and a feeding pipe 24. After the stirring structure 23 stirs the material in the barrel assembly 21, it is transported to the injection mechanism 4 through the feeding pipe 24.

[0059] The barrel assembly 21 includes a powder barrel 211, a liquid barrel 212 and a mixing barrel 213. The powder in the powder barrel 211 and the liquid in the liquid barrel 212 are respectively transported to the mixing barrel 213 in proportion and stirred, and then output from the mixing barrel 213. The powder barrel 211 has a powder barrel valve for controlling the flow rate of the powder in the powder barrel 211; the liquid barrel 212 has a liquid barrel valve for controlling the flow rate of the liquid in the liquid barrel 212; and the mixing barrel 213 has a mixing barrel valve for controlling the flow rate of the material in the mixing barrel 213.

[0060] In order to prevent uneven mixing of the paint from affecting the spraying effect, the feeding mechanism 2 is also provided with a stirring structure 23. Figure 3 As shown, the stirring structure 23 in this embodiment is a first stirring structure 231, which is arranged at the lower part of the mixing barrel 213 and includes a first motor 2311, a first rotating shaft 2312 and blades 2313. The blades 2313 are arranged at different heights on the first rotating shaft 2312. Driven by the first motor 2311, the blades 2313 rotate around the first rotating shaft 2312 to fully stir and mix the powder and the liquid.

[0061] The material delivery pipe 24 is a hose, connecting the mixing drum 213 and the injection mechanism 4, and is used to deliver the mixed material in the mixing drum 213 to the injection mechanism 4 for injection.

[0062] The motion mechanism 3 is used to transport the spray mechanism 4 to the required position of the workpiece for spraying. In order to ensure that the spray head 41 can be accurately positioned, the motion mechanism 3 in this embodiment adopts a three-axis coordinate system, which is electrically connected to the control mechanism 5 and uniformly controlled by the control mechanism 5. The motion mechanism 3 includes an X-axis structure 31, a Y-axis structure 32 and a Z-axis structure 33.

[0063] like Figure 4 As shown, there are two Z-axis structures 33, including a Z-axis guide column 331, a Z-axis drive motor 332 and a Z-axis slider 333. The Z-axis guide column 331 is arranged on the base plate 1, and the Z-axis drive motor 332 is arranged on the outer upper end of the Z-axis guide column 331. The Z-axis slider 333 is sleeved on the outside of the Z-axis guide column 331, and the Z-axis slider 333 can be raised and lowered on the Z-axis guide column 331. When the Z-axis drive motor 332 is driven, the Z-axis guide column 331 rotates, and the Z-axis slider 333 rises or falls accordingly, so as to realize the adjustment of the injection mechanism 4 in the height direction.

[0064] like Figure 5As shown, the X-axis structure 31 includes an X-axis beam 311, an X-axis drive motor 312 and an X-axis slider 313. Both ends of the X-axis beam 311 are fixed to two Z-axis sliders 333, and the X-axis beam 311 can be lifted up and down driven by the Z-axis sliders 333. The X-axis slider 313 is arranged on the X-axis beam 311, and the X-axis slider 313 is sleeved outside the X-axis beam 311. The X-axis drive motor 312 drives the X-axis beam 311 to rotate, and the X-axis slider 313 moves on the X-axis beam 311 accordingly, so as to realize the adjustment of the injection mechanism 4 in the X-axis direction.

[0065] like Figure 6 As shown, the Y-axis structure 32 includes a Y-axis beam 321, a Y-axis drive motor 322 and a Y-axis slider 323. One end of the Y-axis beam 321 is fixed to the X-axis slider 313, and the other end is suspended. The Y-axis drive motor 322 is arranged on one side of the X-axis slider 313. The Y-axis slider 323 is sleeved on the Y-axis beam 321 and can move on the Y-axis beam 321. Driven by the Y-axis drive motor 322, the Y-axis beam 321 rotates, so that the Y-axis slider 323 moves on the Y-axis beam 321, thereby realizing the adjustment of the injection mechanism 4 in the Y-axis direction.

[0066] like Figure 7 As shown, the spray mechanism 4 includes a spray head 41, a connecting seat 43 and a rotating seat 42. The spray mechanism 4 is arranged on the Y-axis slider 323 and can move with the Y-axis slider 323. There are two spray heads 41, including a first spray head 41 and a second spray head 41, and the diameter of the first spray head 41 is larger than that of the second spray head 41. The first spray head 41 is used for ordinary spraying, and the second spray head 41 is a slender spray head, which is used for spraying of slender deep cavities and narrow slit structures, and can penetrate deep into the interior during spraying. The first spray head 41 is arranged at the lower part of the rotating seat 42, and the second spray head 41 is arranged at the side of the rotating seat 42. The rotating seat 42 can rotate around its own axis, and the directions of the two spray heads 41 can rotate with the rotating seat 42.

[0067] Furthermore, the spray mechanism 4 also includes a positioning probe 44 , and the positioning probe 44 is used to feed back the position of the spray head 41 to the control mechanism 5 .

[0068] A feed port is provided on a side of the rotating seat 42 opposite to the second nozzle 41 for connecting to the feed pipe 24 .

[0069] Furthermore, a control mechanism 5 is provided for controlling the movement of the nozzle 41 , the operation of the motion mechanism 3 and the feeding of the feeding mechanism 2 .

[0070] Furthermore, a three-dimensional scanning and measuring system 6 is provided for scanning the mold shape and analyzing the complexity of different areas of the mold and the requirements for coatings.

[0071] Furthermore, a cleaning mechanism 7 is provided for cleaning the mixing barrel and the nozzle 41 after spraying. The cleaning mechanism 7 includes a liquid inlet pipe 71 and a liquid outlet pipe 72. The liquid inlet pipe 71 is provided at the upper part of the mixing barrel 213, and the liquid outlet pipe 72 is provided at the lower part of the mixing barrel 213. The liquid inlet pipe 71 and the liquid outlet pipe 72 are each provided with a valve, namely, a liquid inlet pipe valve and a liquid outlet pipe valve. When the mixing barrel 213 is cleaned after spraying, the cleaning liquid enters the mixing barrel 213 from the liquid inlet pipe 71 and flows out from the liquid outlet pipe 72. When the liquid flows out, the excess material attached to the inside of the mixing barrel 213 is taken out.

[0072] Example 2

[0073] The blades 2313 in the first stirring structure 231 are of a fixed height, and the material between two adjacent layers of blades 2313 is stirred less. During stirring, the material in the stirring center where the blades 2313 are arranged in the middle has a good stirring effect, and the material near the wall has a poor stirring effect because the blades 2313 cannot reach it, and the powder and liquid cannot be fully mixed, and are easily condensed into blocks and adhered to the wall. The difference between this embodiment and embodiment 1 is that this embodiment is provided with a second stirring structure 232 and a third stirring structure 233 to replace the first stirring structure 231.

[0074] like Figure 8 As shown, the second stirring structure 232 includes a second motor 2321 , a second rotating shaft 2322 , a vortex stirring blade 2323 , a first rotating frame 2324 and a first stirring column 2325 .

[0075] The second motor 2321 is disposed at the lower part of the mixing drum 213 . The second motor 2321 outputs a second rotating shaft 2322 . The vortex stirring blade 2323 is sleeved and fixed on the second rotating shaft 2322 for stirring the material at the center of the mixing drum 213 .

[0076] This embodiment is provided with a vortex stirring blade 2323. The spiral structure of the vortex stirring blade 2323 can produce axial and radial mixing effects when rotating. When stirring, the spiral stirring blade can lift the mixture from the bottom upward and mix it in the circumferential direction at the same time, effectively avoiding the formation of dead zones.

[0077] The first rotating frame 2324 is sleeved and fixed on the second rotating shaft 2322. A plurality of first stirring columns 2325 are arranged in the longitudinal direction of the first rotating frame 2324 for stirring the mixture at the wall surface of the mixing barrel 213. It should be noted that the axis of the first stirring column 2325 is perpendicular to the axis of the second rotating shaft 2322.

[0078] The second rotating shaft 2322 can rotate and rise and fall under the action of the second motor 2321, driving the vortex stirring blade 2323 and the first rotating frame 2324 thereon to rotate and rise and fall, stirring and mixing the mixture at multiple heights.

[0079] The third stirring structure 233 includes a third motor 2331, a third rotating shaft 2332, a second rotating frame 2333 and a second stirring column 2334. The third motor 2331 is arranged at the upper part of the mixing barrel 213, and the third motor 2331 is used to drive the third rotating shaft 2332. The third rotating shaft 2332 fixes the second rotating frame 2333, and a plurality of second stirring columns 2334 are longitudinally arranged on the second rotating frame 2333. The second stirring column 2334 is arranged opposite to the first stirring column 2325. It should be noted that the inner diameter formed by the end of the second stirring column 2334 is larger than the outer diameter formed by the end of the first stirring column 2325, so that the first stirring column 2325 and the second stirring column 2334 do not contact each other during rotation. It should be noted that the second rotating shaft 2322 and the third rotating shaft 2332 rotate in opposite directions.

[0080] When the third rotating shaft 2332 rotates, it drives the second rotating frame 2333 and the second stirring column 2334 to rotate. The first stirring column 2325 and the second stirring column 2334 are arranged close to the wall. During stirring, since the first stirring column 2325 and the second stirring column 2334 rotate in opposite directions, the first stirring column 2325 and the second stirring column 2334 stir from different directions, and the vortex formed by the first stirring column 2325 and the vortex formed by the second stirring column 2334 collide with each other and mix synergistically, so that the materials are mixed together faster and more evenly, and the wall attachments and the mixture near the wall are washed more vigorously, thereby improving the stirring effect of the mixture at the wall.

[0081] Furthermore, a sawtooth portion 2335 is provided on the outer side of the second rotating frame 2333 near the wall surface. Fig. 9 As shown, the sawtooth portion 2335 has a first side and a second side, and the first side is inclined at a greater angle to the wall of the mixing barrel 213 than the second side, so that the first side can scrape off the attached matter and flow out from the second side. The sawtooth portion 2335 rotates with the second rotating frame 2333, and can peel off the mixture that is attached to the wall and cannot be washed away, thereby reducing the residue and uneven mixing and agglomeration.

[0082] Compared with the prior art in which the stirring blade 2313 is fixed in height, the vortex stirring blade 2323 and the rotating bracket in the second stirring structure 232 in this embodiment can rotate and rise and fall, thereby achieving a liquid mixing effect at the same height and fully stirring and mixing the mixture of the upper and lower liquid layers, thereby improving the stirring effect.

[0083] Compared with the prior art, in which the stirring structure 23 is only arranged at the center of the mixing barrel 213, the first rotating frame 2324 and the second rotating frame 2333 are arranged near the wall surface in this embodiment, and the first rotating frame 2324 and the second rotating frame 2333 are respectively provided with a first stirring column 2325 and a second stirring column 2334. The first stirring column 2325 and the second stirring column 2334 are arranged relative to each other, and the vortexes formed by the stirring between the first stirring column 2325 and the second stirring column 2334 collide with each other and mix synergistically through the rotational movement in different directions between the stirring columns, so that the materials are mixed together faster and more evenly, and the stirring effect of the mixture at the wall surface is improved. And the outer side of the second rotating frame 2333 is provided with a serrated portion 2335 near the wall surface. The two sides of the serrated portion 2335 have different inclination angles, so that after scraping off the attachments on one side, it can flow out from the other side and enter the mixture, reducing the residual and uneven mixing and agglomeration phenomena.

[0084] The second stirring structure 232 and the third stirring structure 233 of this embodiment cooperate with each other. The second stirring structure 232 is arranged from bottom to top, and the third stirring structure 233 is arranged from top to bottom, and together completes the mixing and stirring of the mixing barrel 213.

[0085] In order to avoid blocking the nozzle 41 and thus damaging the use of the nozzle 41, a cleaning component 73 is provided inside the nozzle 41 in this embodiment. Fig.10 As shown, the cleaning assembly 73 includes a fourth motor 731 , a fourth rotating shaft 732 , a first sleeve 733 , a second sleeve 734 and a third sleeve 735 .

[0086] The fourth motor 731 is disposed on the connection seat 43, and the fourth motor 731 is connected to the fourth rotating shaft 732. The first sleeve 733, the second sleeve 734 and the third sleeve 735 are coaxially disposed. The first sleeve 733 is fixedly disposed in the connection seat 43. During the spraying operation, the third sleeve 735 can be retracted into the second sleeve 734, and the second sleeve 734 can be retracted into the first sleeve 733. When cleaning is required after the spraying operation, the third sleeve 735 extends out of the second sleeve 734, and the first sleeve 733 extends out of the second sleeve 734 to the inside of the spray head 41.

[0087] The wall surface of the second sleeve 734 is provided with a feed pipe opening 7341. During the spraying operation, the feed pipe opening 7341 injects the mixed paint; after the spraying operation, the feed pipe opening 7341 injects the cleaning liquid. The wall surface opposite to the feed pipe opening 7341 is provided with a liquid outlet pipe opening 7342. The side wall of the second sleeve 734 is also provided with an air filling port 7343, which is used to fill compressed gas during cleaning, so as to speed up the flow rate of the cleaning liquid, form a vortex, and flush the spray hole of the nozzle 41.

[0088] Furthermore, a venturi tube 7351 is disposed inside the third sleeve 735, and a conical tube 7352 matching the head of the nozzle 41 is disposed below the venturi tube 7351. The venturi tube 7351 further accelerates the flushing cleaning liquid flow to improve the flushing effect at the nozzle hole of the nozzle 41.

[0089] Furthermore, a brush 7353 is provided on the outer peripheral wall of the third sleeve 735, and the brush 7353 is spirally provided on the outer wall of the third sleeve 735. When the fourth motor 731 drives the fourth rotating shaft 732 to rotate forward, the brush 7353 outside the third sleeve 735 simultaneously brushes the inner wall of the nozzle 41 to remove the excess.

[0090] Compared with the prior art, the cleaning mechanism 7 of the nozzle 41 in this embodiment is a telescopic structure. During the spraying operation, the fixed first sleeve 733 is retracted to prevent interference with the spraying operation; after the spraying operation, the first sleeve 733 is extended to clean the nozzle 41. A venturi tube 7351 is provided at the nozzle 41 of the third sleeve 735, and an air filling port 7343 is provided for filling compressed air. The synergistic effect of the venturi tube 7351 and the compressed air enables the nozzle 41 to be cleaned more thoroughly. A brush 7353 with a spiral structure is provided on the outer peripheral wall of the third sleeve 735. When the fourth rotating shaft 732 rotates, the brush 7353 unscrews the paint that has not been thoroughly washed off the inner wall of the nozzle 41, so that the nozzle 41 is cleaned more thoroughly.

[0091] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic spraying device for casting surface coating, characterized in that: It comprises a base plate (1), a feeding mechanism (2), a moving mechanism (3), an ejecting mechanism (4) and a control mechanism (5); The bottom plate (1) is arranged at the bottom of the device and is used to support the entire device; The feeding mechanism (2) is used to feed the injection mechanism (4), and comprises a barrel assembly (21), a stirring structure (23) and a feeding pipe (24); the moving mechanism (3) is used to transport the injection mechanism (4) to a desired position; The spraying mechanism (4) is arranged on the moving mechanism (3), and the spraying mechanism (4) is used to implement a spraying operation; The material delivery pipe (24) connects the barrel assembly (21) and the injection mechanism (4); The feeding mechanism (2), the moving mechanism (3) and the ejecting mechanism (4) are electrically connected to the control mechanism (5).

2. The automatic spraying device for casting surface coating according to claim 1 is characterized in that: The barrel assembly (21) comprises a powder barrel (211), a liquid barrel (212) and a mixing barrel (213); the material in the powder barrel (211) and the liquid in the liquid barrel (212) are respectively fed into the mixing barrel (213) in proportion to be stirred and mixed, so as to supply the injection mechanism (4).

3. The automatic spraying device for casting surface coating according to claim 2 is characterized in that: The stirring structure (23) comprises a first stirring structure (231), and the first stirring structure (231) is arranged at the lower part of the mixing barrel (213); the first stirring structure (231) comprises a first motor (2311), a first rotating shaft (2312) and blades (2313).

4. The automatic spraying device for casting surface coating according to claim 3 is characterized in that: The blades (2313) are arranged at different heights on the first rotating shaft (2312).

5. The automatic spraying device for casting surface coating according to claim 1 is characterized in that: The motion mechanism (3) comprises an X-axis structure (31), a Y-axis structure (32) and a Z-axis structure (33).

6. The automatic spraying device for casting surface coating according to claim 1, characterized in that: The spray mechanism (4) comprises a spray head (41); the spray head (41) comprises a first spray head (411) and a second spray head (412); the diameter of the first spray head (411) is greater than the diameter of the second spray head (412).

7. The automatic spraying device for casting surface coating according to claim 6 is characterized in that: The spraying mechanism (4) further comprises a connecting seat (43) and a rotating seat (42); the connecting seat (43) is used to connect the Y-axis structure (32) and the rotating seat (42); the first spray head (411) is arranged at the lower part of the rotating seat (42), and the second spray head (412) is arranged at one side of the rotating seat (42); the first spray head (411) and the second spray head (412) are capable of rotating along with the rotating seat (42).

8. The automatic spraying device for casting surface coating according to claim 1, characterized in that: It also includes a three-dimensional scanning and measuring system (6), which is used to scan the shape of the casting mold and analyze the complexity of different areas of the casting mold and the demand for coating.

9. The automatic spraying device for casting surface coating according to claim 1, characterized in that: It also comprises a cleaning mechanism (7), wherein the cleaning mechanism (7) comprises a liquid inlet pipe (71) arranged at the upper part of the mixing cylinder (213) and a liquid outlet pipe (72) arranged at the lower part of the mixing cylinder (213).

10. An automatic spraying method for a casting surface coating, characterized in that: An automatic spraying device for the casting surface coating described in any one of 1-9.

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