An automatic spraying device for a mold surface coating

Abstract

The present application relates to a kind of automatic spraying device of mould surface coating, belong to casting technical field, solve the problem of uneven mixing of coating in prior art in mould spraying and not completely cleaning of spray head.The present application includes bottom plate, feeding mechanism, movement mechanism, spraying mechanism and control mechanism;Bottom plate is set in the bottom of device, for supporting the whole device;Feeding mechanism is used to feed spraying mechanism, including barrel assembly, stirring structure and feed pipe;Movement mechanism is used to transport spraying mechanism to the desired position;Spraying mechanism is set in movement mechanism, and spraying mechanism is used to implement spraying operation;Spraying mechanism includes spray head;Feed pipe connects barrel assembly and spray head;Feeding mechanism, movement mechanism and spraying mechanism are electrically connected with control mechanism.The present application can realize the automatic spraying of mould surface, and coating is uniformly mixed, and spray head is completely cleaned.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and in particular to an automatic spraying device for coating the surface of casting molds. Background Technology

[0002] In existing technologies, uneven coating of the mold surface during spraying can easily lead to poor spraying results, and incomplete cleaning of the spray head can cause internal blockage of the spray head, affecting its use. Summary of the Invention

[0003] Based on the above analysis, the present invention aims to provide an automatic spraying device for coating the surface of a casting mold, in order to solve the problems of uneven mixing of coating materials and incomplete cleaning of the spray nozzle in the prior art.

[0004] The objective of this invention is mainly achieved through the following technical solutions:

[0005] In one aspect, the present invention provides an automatic spraying device for coating a casting surface, comprising a base plate, a feeding mechanism, a motion mechanism, a spraying mechanism, and a control mechanism; the base plate is disposed at the bottom of the device and is used to support the entire device;

[0006] The feeding mechanism is used to supply material to the spraying mechanism, and includes a material cylinder assembly, a stirring structure, and a material conveying pipe;

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

[0008] The spraying mechanism is mounted on the motion mechanism and is used to perform spraying operations.

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

[0010] The feeding mechanism, the motion mechanism, and the injection mechanism are electrically connected to the control mechanism.

[0011] Furthermore, the feed cylinder assembly includes a powder cylinder, a liquid cylinder, and a mixing cylinder; the material in the powder cylinder and the liquid in the liquid cylinder are respectively fed into the mixing cylinder in proportion for stirring and mixing, which is used to supply the spraying mechanism.

[0012] Furthermore, the stirring structure includes a first stirring structure disposed at the lower part of the mixing cylinder; 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 spraying mechanism includes a nozzle; the nozzle includes a first nozzle and a second nozzle; the diameter of the first nozzle is larger than that of the second nozzle.

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

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

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

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

[0020] Furthermore, the stirring structure also includes a second stirring structure, which includes 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 with the second rotating shaft; the vortex stirring blade is used to stir the mixture in the middle of the mixing cylinder.

[0022] Furthermore, the second stirring structure also includes a first rotating frame; the first rotating frame is used to stir the mixture near the wall of the mixing cylinder; the first rotating frame is sleeved on the second rotating shaft, and the first rotating frame can rotate and move up and down 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 also includes a third stirring structure, which includes a third motor, a third rotating shaft, a second rotating frame, and a second stirring column;

[0025] The second rotating frame is mounted on the third rotating shaft and can rotate 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 that of the first stirring column;

[0026] The second rotating shaft rotates in the opposite direction to the third rotating shaft.

[0027] Furthermore, the second rotating frame is provided with a serrated portion on its exterior, the serrated portion being used to peel off the wall-attached material; the serrated portion has a first side and a second side, the first side having a greater inclination angle to the wall of the mixing cylinder than the second side.

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

[0029] The first sleeve is fixedly mounted on the connecting seat, the second sleeve is retractable into the first sleeve, and the third sleeve is retractable into the second sleeve.

[0030] Furthermore, the third sleeve is provided with a venturi tube, and the exterior 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 the position and a feeding structure to feed the nozzle for spraying. The operation of the feeding mechanism, motion mechanism and spraying mechanism is controlled by a control mechanism to realize automatic spraying.

[0033] (2) The present invention has two nozzles, including a first nozzle and a second nozzle. The first nozzle is used for general spraying, and the second nozzle is used for slender deep cavities and narrow slit structures. A slender nozzle can be selected to allow for deep internal spraying. The first nozzle is located at the lower part of the rotating base, and the second nozzle is located at the side of the rotating base. The rotating base can rotate around its own axis, and the directions of the two nozzles can rotate with the rotating base, which can be selected according to the spraying requirements.

[0034] (3) The motion mechanism of the present invention is used to transport the spraying assembly to the required position on the workpiece for spraying. 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 is 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 sets up a three-dimensional scanning measurement system for scanning the shape of the mold and analyzing the complexity of different areas of the mold and the requirements for coatings.

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

[0037] (6) Compared with the fixed height of the stirring blades in the prior art, the vortex stirring blades and rotating support in the second stirring structure of the present invention can rotate and rise and fall, so as to achieve the liquid mixing effect at the same height, and at the same time, the mixture of the upper and lower liquid layers can be fully stirred and mixed, thereby improving the stirring effect.

[0038] (7) Compared to the prior art where the stirring structure is only set in the center of the mixing cylinder, the present invention sets a first rotating frame and a second rotating frame near the wall, each equipped with a first stirring column and a second stirring column. The first and second stirring columns are arranged opposite each other, and through the different rotational movements between the stirring columns, the vortices formed by the stirring between the first and second stirring columns collide and mix synergistically, making the materials mix together faster and more evenly, and improving the stirring effect of the mixture at the wall. In addition, a serrated part is provided on the outer side of the second rotating frame near the wall. The two sides of the serrated part have different inclination angles, so that the adhering material scraped off on one side can flow out from the other side and enter the mixture, reducing residue, uneven mixing, and agglomeration. The present invention is equipped with a second stirring structure and a third stirring structure that work together. The second stirring structure is set from bottom to top, and the third stirring structure is set from top to bottom, together completing the mixing and stirring of the mixing cylinder.

[0039] (8) Compared with the prior art, the present invention sets the nozzle cleaning mechanism as a telescopic structure. During the spraying operation, the first sleeve is retracted and fixed to prevent interference with the spraying operation; after the spraying operation, the first sleeve extends to clean the nozzle. The third sleeve is equipped with a Venturi tube structure at the nozzle and has an air inlet for filling with compressed air. The combined action of the Venturi tube and compressed air makes the nozzle cleaning more thorough. The outer peripheral wall of the third sleeve is equipped with a spiral brush. When the fourth shaft rotates, the brush unscrambles the paint that has not been thoroughly rinsed off the inner wall of the nozzle, making the nozzle cleaning more thorough.

[0040] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0041] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

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

[0043] Figure 2This is a schematic diagram of the material cylinder assembly and cleaning mechanism in Example 1;

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

[0045] Figure 4 This is a schematic diagram of the Z-axis structure in Example 1;

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

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

[0048] Figure 7 This is a schematic diagram of the nozzle structure in Example 1;

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

[0050] Figure 9 This is a schematic diagram of the sawtooth structure in Example 2;

[0051] Figure 10 This is a schematic diagram of the nozzle structure in Example 2.

[0052] Figure label:

[0053] 1-Base plate, 2-Feeding mechanism, 21-Material cylinder assembly, 211-Powder cylinder, 212-Liquid cylinder, 213-Mixing cylinder, 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-Serrated section, 24-Conveying pipe, 3-Motion mechanism, 31-X-axis structure, 311-X-axis crossbeam, 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-spraying 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-inlet pipe, 72-outlet pipe, 73-cleaning assembly, 731-fourth motor, 732-fourth rotating shaft, 733-first sleeve, 734-second sleeve, 7341-feed inlet, 7342-outlet, 7343-air inlet, 735-third sleeve, 7351-Venturi tube, 7352-conical tube, 7353-brush. Detailed Implementation

[0054] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which 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 intended to limit the scope of the present invention.

[0055] Example 1

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

[0057] The base plate 1 is located at the bottom of the device and is used to support the entire device.

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

[0059] The feed cylinder assembly 21 includes a powder cylinder 211, a liquid cylinder 212, and a mixing cylinder 213. The powder in the powder cylinder 211 and the liquid in the liquid cylinder 212 are respectively fed into the mixing cylinder 213 for mixing in a specific ratio, and then discharged from the mixing cylinder 213. The powder cylinder 211 has a powder cylinder valve for controlling the flow rate of the powder in the powder cylinder 211; the liquid cylinder 212 has a liquid cylinder valve for controlling the flow rate of the liquid in the liquid cylinder 212; and the mixing cylinder 213 has a mixing cylinder valve for controlling the flow rate of the material in the mixing cylinder 213.

[0060] To prevent uneven mixing of the paint from affecting the spraying effect, the feeding mechanism 2 is also equipped with a stirring structure 23. For example... Figure 3 As shown, the stirring structure 23 in this embodiment is a first stirring structure 231, which is located at the lower part of the mixing cylinder 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 achieve thorough mixing of powder and liquid.

[0061] The conveying pipe 24 is a flexible hose that connects the mixing cylinder 213 and the spraying mechanism 4, and is used to convey the mixed material in the mixing cylinder 213 to the spraying mechanism 4 for spraying.

[0062] The motion mechanism 3 is used to transport the spraying mechanism 4 to the required position on the workpiece for spraying. To ensure that the nozzle 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 is 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, the Z-axis structure 33 has two components: a Z-axis guide post 331, a Z-axis drive motor 332, and a Z-axis slider 333. The Z-axis guide post 331 is mounted on the base plate 1, and the Z-axis drive motor 332 is mounted on the upper outer end of the Z-axis guide post 331. The Z-axis slider 333 is fitted onto the outside of the Z-axis guide post 331 and can move up and down on the Z-axis guide post 331. When the Z-axis drive motor 332 is driven, the Z-axis guide post 331 rotates, and the Z-axis slider 333 rises or falls accordingly, thereby adjusting the height of the spraying mechanism 4.

[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. The two ends of the X-axis beam 311 are fixed to two Z-axis sliders 333, allowing the X-axis beam 311 to move up and down under the influence of the Z-axis sliders 333. An X-axis slider 313 is mounted on the X-axis beam 311 and is fitted onto the outside of the X-axis beam 311. The X-axis drive motor 312 drives the X-axis beam 311 to rotate, causing the X-axis slider 313 to move along the X-axis beam 311, thus adjusting the spray 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 located 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, causing the Y-axis slider 323 to move 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 spraying mechanism 4 includes a nozzle 41, a connecting seat 43, and a rotating seat 42. The spraying mechanism 4 is mounted on the Y-axis slider 323 and can move with the Y-axis slider 323. Two nozzles 41 are provided, including a first nozzle 41 and a second nozzle 41, with the first nozzle 41 having a larger diameter than the second nozzle 41. The first nozzle 41 is used for general spraying, while the second nozzle 41 is a long and slender nozzle used for spraying long, deep cavities and narrow slit structures, allowing it to penetrate deeply into these structures during spraying. The first nozzle 41 is located at the lower part of the rotating seat 42, and the second nozzle 41 is located at the side of the rotating seat 42. The rotating seat 42 can rotate around its own axis, and the directions of the two nozzles 41 can rotate with the rotating seat 42.

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

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

[0069] Furthermore, a control mechanism 5 is provided to control 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 measurement system 6 is also provided to scan the shape of the mold and analyze 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 cylinder and nozzle 41 after spraying. The cleaning mechanism 7 includes an inlet pipe 71 and an outlet pipe 72. The inlet pipe 71 is located at the upper part of the mixing cylinder 213, and the outlet pipe 72 is located at the lower part of the mixing cylinder 213. Both the inlet pipe 71 and the outlet pipe 72 are equipped with valves, namely an inlet valve and an outlet valve, respectively. When cleaning the mixing cylinder 213 after spraying, the cleaning fluid enters the mixing cylinder 213 through the inlet pipe 71 and flows out through the outlet pipe 72. The flowing liquid carries away any excess material adhering to the inside of the mixing cylinder 213.

[0072] Example 2

[0073] The blades 2313 in the first stirring structure 231 have a fixed height, and the material between two adjacent layers of blades 2313 experiences less stirring force. During stirring, the material in the stirring center where the blades 2313 are located in the middle has a good stirring effect, while the material near the wall has a poor stirring effect because the blades 2313 cannot reach it. The powder and liquid cannot be fully mixed, and it is easy to agglomerate and adhere to the wall. The difference between this embodiment and Embodiment 1 is that this embodiment provides a second stirring structure 232 and a third stirring structure 233 instead of 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 located 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 to the second rotating shaft 2322 and is used to stir the material in the center of the mixing drum 213.

[0076] In this embodiment, a vortex stirring blade 2323 is provided. The spiral structure of the vortex stirring blade 2323 can generate axial and radial mixing effects when rotating. During stirring, the spiral stirring blade can lift the mixture from the bottom to the top, while mixing in the circumferential direction, effectively avoiding the formation of dead zones.

[0077] The first rotating frame 2324 is sleeved and fixed to the second rotating shaft 2322. Multiple first stirring columns 2325 are longitudinally arranged on the first rotating frame 2324 for stirring the mixture on the wall of the mixing cylinder 213. It should be noted that the axis of the first stirring columns 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 on it 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 second stirring columns 2334. The third motor 2331 is located at the upper part of the mixing cylinder 213 and drives the third rotating shaft 2332. The third rotating shaft 2332 fixes the second rotating frame 2333, and multiple second stirring columns 2334 are longitudinally arranged on the second rotating frame 2333. The second stirring columns 2334 are arranged opposite to the first stirring column 2325. It should be noted that the inner diameter formed at the end of the second stirring column 2334 is larger than the outer diameter formed at 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 also 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 positioned near the wall. During stirring, since the first stirring column 2325 and the second stirring column 2334 rotate in opposite directions, they stir from different directions. The vortices formed by the first stirring column 2325 and the second stirring column 2334 collide and mix synergistically, making the materials mix together faster and more evenly, and more forcefully flushing the wall-attached substances and the mixture near the wall, thus improving the stirring effect of the mixture at the wall surface.

[0081] Furthermore, a serrated portion 2335 is provided on the outer side of the second rotating frame 2333 near the wall surface. For example... Figure 9 As shown, the serrated portion 2335 has a first side and a second side. The angle of inclination between the first side and the wall of the mixing cylinder 213 is greater than that of the second side, so that the adhering material scraped off from the first side can flow out from the second side. As the second rotating frame 2333 rotates, the serrated portion 2335 can peel off the mixture that cannot be washed off the wall, reducing residue and uneven mixing and clumping.

[0082] Compared to the prior art where the stirring blade 2313 is fixed at a certain height, the vortex stirring blade 2323 and the rotating support in the second stirring structure 232 of this embodiment can rotate and rise and fall, so as to achieve the liquid mixing effect at the same height, and at the same time, the mixture of the upper and lower liquid layers can be fully stirred and mixed, thereby improving the stirring effect.

[0083] Compared to existing technologies where the stirring structure 23 is only located in the center of the mixing cylinder 213, this embodiment features a first rotating frame 2324 and a second rotating frame 2333 near the wall. Each of the first and second rotating frames 2324 and 2333 is equipped with a first stirring column 2325 and a second stirring column 2334. The first and second stirring columns 2325 and 2334 are positioned opposite each other. Through their rotational movements in different directions, the vortices formed by the stirring between the first and second stirring columns 2325 and 2334 collide and mix synergistically, resulting in faster and more uniform mixing of the materials and improving the mixing effect at the wall surface. Furthermore, the outer side of the second rotating frame 2333 near the wall surface has a serrated section 2335. The serrated section 2335 has different inclination angles on both sides, allowing any material scraped off on one side to flow out from the other side and into the mixture, reducing residue, uneven mixing, and clumping.

[0084] In this embodiment, the second stirring structure 232 and the third stirring structure 233 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, together completing the mixing and stirring of the mixing cylinder 213.

[0085] To prevent clogging of the nozzle 41 and thus damage to its operation, this embodiment includes a cleaning assembly 73 inside the nozzle 41. Figure 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] A fourth motor 731 is mounted on a connecting base 43 and connected to a fourth rotating shaft 732. A first sleeve 733, a second sleeve 734, and a third sleeve 735 are coaxially arranged. The first sleeve 733 is fixedly mounted inside the connecting base 43. During spraying, the third sleeve 735 retracts into the second sleeve 734, and the second sleeve 734 retracts into the first sleeve 733. When cleaning is required after spraying, the third sleeve extends out of the second sleeve 734, and the first sleeve 733 extends out of the second sleeve 734 into the nozzle 41.

[0087] The second sleeve 734 has a feed inlet 7341 on its wall. During spraying, the mixed paint is injected into the feed inlet 7341; after spraying, cleaning fluid is injected into the feed inlet 7341. An outlet 7342 is located on the opposite wall of the feed inlet 7341. An air inlet 7343 is also provided on the side wall of the second sleeve 734 for injecting compressed gas during cleaning, thereby increasing the flow rate of the cleaning fluid, forming a vortex, and flushing the nozzle orifice of the spray head 41.

[0088] Furthermore, a venturi tube 7351 is provided inside the third sleeve 735, and a tapered tube 7352 matching the head of the nozzle 41 is provided at the lower part of the venturi tube 7351. The venturi tube 7351 further accelerates the flushing cleaning fluid flow, improving the flushing effect at the nozzle orifice 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 arranged 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 on the outside of the third sleeve 735 simultaneously brushes the inner wall of the nozzle 41 to remove excess material.

[0090] Compared to existing technologies, this embodiment features a telescopic nozzle cleaning mechanism 7. During spraying, the first sleeve 733 retracts and is fixed to prevent interference with the spraying process. After spraying, the first sleeve 733 extends to clean the nozzle 41. A Venturi tube 7351 and an air inlet 7343 are provided at the nozzle 41 on the third sleeve 735 for charging compressed air. The synergistic effect of the Venturi tube 7351 and compressed air ensures a more thorough cleaning of the nozzle 41. A spiral brush 7353 is provided on the outer peripheral wall of the third sleeve 735. When the fourth rotating shaft 732 rotates, the brush 7353 removes any remaining paint from the inner wall of the nozzle 41, further cleaning the nozzle 41.

[0091] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic spraying device for coating the surface of a casting mold, characterized in that, It includes a base plate, a feeding mechanism, a motion mechanism, a spraying mechanism, and a control mechanism; A base plate is located at the bottom of the device to support the entire device; a feeding mechanism is used to supply material to the spraying mechanism, including a material cylinder assembly, a stirring structure, and a conveying pipe; a motion mechanism is used to transport the spraying mechanism to the required position; the stirring structure includes a second stirring structure and a third stirring structure; The second stirring structure includes a second motor, a second rotating shaft, a vortex stirring blade, and a first rotating frame; the vortex stirring blade and the first rotating frame are both sleeved on the second rotating shaft and can rotate and rise and fall with the second rotating shaft; 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; The third stirring structure includes a third motor, a third rotating shaft, a second rotating frame, and a second stirring column. The second rotating frame is mounted on the third rotating shaft and can rotate with it. The second rotating frame has a second stirring column arranged longitudinally, and the axis of the second stirring column is parallel to that of the first stirring column. The first and second stirring columns are positioned against the wall. The second stirring column is positioned opposite to the first stirring column, and the inner diameter formed at the end of the second stirring column is larger than the outer diameter formed at the end of the first stirring column. The second rotating shaft rotates in opposite directions to the third rotating shaft. The first and second stirring columns rotate in opposite directions, and the first and second stirring columns stir from different directions. The vortices formed by the first and second stirring columns collide with each other and mix synergistically. The second rotating frame has a serrated section on its exterior, which is used to peel off the wall-mounted material. The serrated section has a first side and a second side, and the angle of inclination between the first side and the wall of the mixing cylinder is greater than that of the second side. The spraying mechanism is mounted on the motion mechanism and is used to perform the spraying operation; the material delivery pipe connects the material cylinder assembly and the spraying mechanism; the feeding mechanism, motion mechanism, and spraying mechanism are electrically connected to the control mechanism; The spraying mechanism includes a nozzle, a connecting seat, and a rotating seat; the nozzle includes a first nozzle and a second nozzle; the diameter of the first nozzle is larger than the diameter of the second nozzle; the connecting seat is used to connect the Y-axis structure and the rotating seat; the first nozzle is located at the lower part of the rotating seat, and the second nozzle is located on one side of the rotating seat; the first nozzle and the second nozzle can rotate with the rotating seat. The nozzle has an internal cleaning assembly, which includes a fourth motor, a fourth rotating shaft, a first sleeve, a second sleeve, and a third sleeve. The fourth motor is mounted on a connecting base and connected to the fourth rotating shaft. The first, second, and third sleeves are coaxially arranged. The first sleeve is fixedly mounted inside the connecting base. During spraying, the third sleeve retracts into the second sleeve, and the second sleeve retracts into the first sleeve. When cleaning is required after spraying, the second sleeve extends out of the first sleeve, and the third sleeve extends out of the second sleeve into the nozzle. A venturi tube is installed inside the third sleeve. A brush is installed on the outer peripheral wall of the third sleeve, spirally arranged on the outer wall. When the fourth motor drives the fourth rotating shaft to rotate forward, the brush on the outside of the third sleeve simultaneously brushes the inner wall of the nozzle.

2. The automatic spraying device for coating the surface of the casting mold according to claim 1, characterized in that, The feed cylinder assembly includes a powder cylinder, a liquid cylinder, and a mixing cylinder; the material in the powder cylinder and the liquid in the liquid cylinder are fed into the mixing cylinder in proportion for stirring and mixing to supply the spraying mechanism.

3. The automatic spraying device for coating the surface of a casting mold according to claim 1, characterized in that, The motion mechanism includes an X-axis structure, a Y-axis structure, and a Z-axis structure.

4. The automatic spraying device for coating the surface of a casting mold according to claim 1, characterized in that, It also includes a 3D scanning measurement system, which is used to scan the shape of the mold and analyze the complexity of different areas of the mold and the requirements for coatings.

5. The automatic spraying device for coating the surface of a casting mold according to claim 1, characterized in that, It also includes a cleaning mechanism, which includes an inlet pipe located at the top of the mixing cylinder and an outlet pipe located at the bottom of the mixing cylinder.

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