Spraying device for nodular iron casting production

By installing a scraper in the ductile iron component spraying device, the coating prevents droplets and protrusions from forming on the bottom of the ductile iron tube fittings, the problem of poor spraying quality is solved, and a flatter spray surface and higher spray quality is achieved.

CN222817119UActive Publication Date: 2025-05-02江苏隧锦五金制造有限公司
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Patent Information

Application Number
CN202421623797.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-09
Publication Date
2025-05-02
Estimated Expiration
2034-07-09

AI Technical Summary

Technical Problem

During the process of rotating and spraying thicker coatings with ductile iron pipe fittings, due to gravity, the paint forms droplets at the lower end of the ductile iron pipe fittings, forming paint protrusions and uneven surfaces, which reduces the spray quality of the ductile iron parts.

Method used

A spraying device for producing ductile iron castings is designed. By providing a scraper in the spraying device, the scraper moves up and down in the storage box through a telescopic rod and moves to the side below the pipe fitting, so that the blade of the scraper is tangent to the pipe fitting, preventing the paint from forming droplets and protrusions under the action of gravity.

Benefits of technology

It effectively prevents the paint from forming droplets and protrusions on the bottom of the ductile iron pipe fittings, ensures that the spraying surface is flat, and improves the spraying quality of the ductile iron parts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of nodular iron casting spraying, and particularly relates to a nodular iron casting production spraying device which comprises a base. An adjusting motor is fixedly installed in the center of the top of the fixing frame, a second lead screw is rotatably installed in the fixing frame, a rotating shaft of the adjusting motor is fixedly connected with the upper end of the second lead screw, a sliding block is slidably arranged in the fixing frame and slidably installed on the second lead screw, and telescopic cylinders are fixedly installed on the two sides of the inner end of the sliding block. Telescopic rods are installed in the telescopic cylinders in a sliding mode, the other ends of the telescopic rods are fixedly connected to one side of the storage box, a third air cylinder is arranged between the telescopic cylinders and fixedly installed on the sliding block, a piston rod of the third air cylinder is fixedly connected to the storage box, a tool apron is arranged on one side in the storage box, and a scraper is installed on the tool apron in a sliding mode. The scraper is arranged to grind the coating on the nodular cast iron pipe fitting, so that the coating is prevented from forming liquid drops at the bottom of the pipe fitting, and non-uniform spraying is avoided.
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Description

Technical Field

[0001] The utility model relates to the technical field of ductile iron casting spraying, in particular to a ductile iron casting production spraying device. Background Art

[0002] Ductile iron castings are widely used in machinery manufacturing, automobile industry, construction engineering, pipeline engineering and other fields. They are a material with excellent performance and wide application. The ductile iron casting production spraying device is one of the indispensable equipment in the production process of ductile iron pipes and their accessories.

[0003] The spraying device achieves the purpose of coating the surface of the workpiece evenly and quickly through the steps of coating supply, coating atomization, spraying operation and coating formation. Its high efficiency, uniformity, adaptability and environmental protection make it widely used in production.

[0004] During the process of rotary spraying thicker coating on ductile iron pipe fittings, due to the effect of gravity, the coating forms droplets at the lower end of the ductile iron pipe fittings, resulting in coating protrusions and uneven surface, which reduces the spraying quality of the ductile iron fittings. Therefore, a ductile iron fitting production spraying device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, in the process of rotating spraying thicker coatings on ductile iron pipe fittings, due to the effect of gravity, the coating forms droplets at the lower end of the ductile iron pipe fittings, forming coating protrusions and an uneven surface, which reduces the spraying quality of the ductile iron fittings. The utility model proposes a ductile iron fitting production spraying device.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a ductile iron casting production spraying device described in the utility model comprises a base; a slide rail is fixedly installed on the upper part of the base, and movable plates are provided at both ends of the upper part of the base and are slidably installed on the slide rail, a threaded hole is opened on one side of the lower end of the movable plate, a conical chuck is provided on the inner side of the upper end of the movable plate, the outer ends of the conical chucks are rotatably installed on the movable plate through bearings, and a first gear is fixedly installed through the movable plate, a guide rod is provided on one side of the slide rail and is fixedly installed on the base, a first screw rod is provided on the other side of the slide rail, both ends of the first screw rod are rotatably installed on the base through bearings, a mobile motor is fixedly installed on one end of the base, and the rotating shaft of the mobile motor is fixedly connected to one end of the first screw rod, a spray box is provided on the upper part of the base, a sliding hole is opened on the top of the spray box, a fixed block is slidably installed inside the sliding hole, a No. 1 cylinder is fixedly installed on the top of the fixed block, and a spray head is fixedly installed on the front end of the piston rod of the No. 1 cylinder; the spraying device is driven to move by setting the first screw rod, and pipe fittings of different sizes are sprayed.

[0007] A fixing frame is fixedly installed on the inner wall of one side of the spray box, an adjusting motor is fixedly installed at the top center of the fixing frame, a second screw is rotatably installed in the fixing frame, the rotating shaft of the adjusting motor is fixedly connected to the upper end of the second screw, a slider is slidably arranged in the fixing frame, a threaded hole is opened in the slider, the slider is slidably installed on the second screw, telescopic cylinders are fixedly installed on both sides of the inner end of the slider, a telescopic rod is slidably installed in the telescopic cylinder, the other end of the telescopic rod is fixedly connected to one side of the storage box, a No. 3 cylinder is arranged between the telescopic cylinders and fixedly installed on the slider, the piston rod of the No. 3 cylinder is fixedly connected to the storage box, a knife seat is opened on one side of the interior of the storage box, a scraper is slidably installed on the knife seat, and the paint on the ductile iron pipe fittings is smoothed by setting the scraper to prevent the paint from forming droplets at the bottom of the pipe fittings, causing uneven spraying.

[0008] Preferably, a bidirectional screw is provided inside the slide rail, and both ends of the bidirectional screw are rotatably installed in the slide rail through bearings. The movable plates are slidably installed at both ends of the bidirectional screw respectively. A clamping motor is fixedly installed at one end of the slide rail, and the rotating shaft of the clamping motor is fixedly connected to one end of the bidirectional screw. By setting the bidirectional screw, the distance between the two conical chucks is controlled to clamp and fix pipes of different sizes.

[0009] Preferably, a rotating motor is fixedly installed at the lower end of the outer side of the movable plate, a second gear is fixedly installed on the rotating shaft of the rotating motor, the second gear is meshed with the first gear, and the rotating motor is arranged to drive the conical chuck to drive the pipe to rotate, so that the spraying is more uniform.

[0010] Preferably, a material storage box is fixedly installed on one side of the spray box, a water pump is fixedly installed on the top of the material storage box, the water inlet end of the water pump is fixedly connected to the material storage box, and the lower end extends to the bottom of the material storage box, and the water outlet end of the water pump is fixedly connected to a hose, and the other end of the hose passes through the spray box and is fixedly connected to one side of the nozzle. By setting the material storage box fixedly installed on the spray box, the transportation of paint is facilitated.

[0011] Preferably, a No. 2 cylinder is fixedly installed on one side of the upper end of the spray box, and the piston rod of the No. 2 cylinder is fixedly connected to the fixed block. By setting the No. 2 cylinder, the spray head can cover a wider spraying area, thereby improving the spraying efficiency and operating range.

[0012] Preferably, a mounting hole is provided in the middle of the box body on the other side of the spray box, a wind tube is provided outside the mounting hole and fixedly installed on the spray box, a plurality of filter holes are provided on the outer end of the wind tube, and a fan is fixedly installed inside the wind tube, an electric heating wire is provided in the mounting hole and fixedly installed in the spray box, by arranging the fan and the electric heating wire, hot air can be evenly blown to the spraying surface to achieve uniform temperature distribution, thereby preventing spraying quality problems caused by uneven temperature.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model uses a spray device to perform anti-corrosion treatment on ductile iron pipe fittings during the production of ductile iron fittings. After the pipe fittings are fixed, the conical chuck is driven by the first gear to drive the pipe fitting to rotate, the moving motor is started to drive the first screw rod to rotate, the first screw rod drives the spray box to move from one end of the base to one end of the pipe fitting through the guide rod, the spray box slides from the outside of the moving plate when moving, drives the spray head to move to the spraying position at one end of the pipe fitting, the adjustment motor is started to drive the second screw rod to rotate, the second screw rod drives the slider to slide in the fixed frame, the slider drives the scraper to move up and down through the storage box, and the No. 3 cylinder is started to push the scraper to move to one side of the pipe fitting, and the telescopic rod slides outward in the telescopic tube. The scraper moves to the side below the pipe fitting so that the blade of the scraper is tangent to the pipe fitting, and the spraying device is started to spray the pipe fitting. After the pipe fitting is sprayed, it rotates to the scraper, and the scraper smoothes the coating. At the same time, the excess paint is collected in the storage box to prevent the paint from forming droplets at the bottom of the pipe fitting under the action of gravity, forming paint bulges, and making the spraying surface uneven. The structural design realizes the function of smoothing the paint, and solves the problem that in the process of rotating spraying thicker paint on ductile iron pipe fittings, due to the action of gravity, the paint forms droplets at the lower end of the ductile iron pipe fittings, forming paint bulges, and the surface is uneven, which reduces the spraying quality of ductile iron parts, and improves the spraying quality of ductile iron parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of one side of the spraying device;

[0017] Figure 2 It is a schematic diagram of the overall structure of the other side of the spraying device;

[0018] Figure 3 It is a schematic diagram of the internal structure of the spraying device;

[0019] Figure 4 It is a schematic diagram of the structure of the scraping mechanism;

[0020] Figure 5 Schematic diagram of the air drying device structure.

[0021] In the figure: 1. base; 2. slide rail; 3. bidirectional screw; 4. clamping motor; 5. moving plate; 6. conical chuck; 7. first gear; 8. rotating motor; 9. second gear; 10. first screw; 11. guide rod; 12. moving motor; 13. spray box; 14. fixed block; 15. No. 1 cylinder; 16. No. 2 cylinder; 17. nozzle; 18. hose; 19. water pump; 20. storage box; 21. fixed frame; 22. second screw; 23. adjustment motor; 24. slider; 25. telescopic cylinder; 26. telescopic rod; 27. No. 3 cylinder; 28. storage box; 29. ​​scraper; 30. air cylinder; 31. fan; 32. electric heating wire. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 As shown, a ductile iron casting production spraying device comprises a base 1; a slide rail 2 is fixedly installed on the upper part of the base 1, and movable plates 5 are provided at both ends of the upper part of the base 1 and are slidably installed on the slide rail 2, and a threaded hole is opened on one side of the lower end of the movable plate 5, and a conical chuck 6 is provided on the inner side of the upper end of the movable plate 5, and the outer ends of the conical chucks 6 are rotatably installed on the movable plate 5 through bearings, and a first gear 7 is fixedly installed through the movable plate 5, a guide rod 11 is provided on one side of the slide rail 2 and is fixedly installed on the base 1, and a first screw rod 10 is provided on the other side of the slide rail 2, and both ends of the first screw rod 10 are rotatably installed on the base 1 through bearings, and a movable motor is fixedly installed on one end of the base 1 12, the rotating shaft of the mobile motor 12 is fixedly connected to one end of the first screw rod 10, a spray box 13 is arranged on the upper part of the base 1, a sliding hole is opened on the top of the spray box 13, a fixed block 14 is slidably installed inside the sliding hole, a No. 1 cylinder 15 is fixedly installed on the top of the fixed block 14, and a nozzle 17 is fixedly installed at the front end of the piston rod of the No. 1 cylinder 15; when working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are treated with anti-corrosion by using a spraying device, the pipe fittings are hoisted above the base 1, and the two moving plates 5 are driven to move relatively in the slide rail 2, and the moving plate 5 drives the conical chuck 6 to clamp and position the pipe fittings at both ends, and the conical chuck 6 is used to realize the positioning and fixing of pipe fittings with different inner diameters;

[0024] A fixing frame 21 is fixedly installed on the inner wall of one side of the spray box 13, an adjusting motor 23 is fixedly installed on the top center of the fixing frame 21, a second screw rod 22 is rotatably installed in the fixing frame 21, the rotating shaft of the adjusting motor 23 is fixedly connected to the upper end of the second screw rod 22, a slider 24 is slidably arranged in the fixing frame 21, a threaded hole is opened inside the slider 24, the slider 24 is slidably installed on the second screw rod 22, and telescopic cylinders 25 are fixedly installed on both sides of the inner end of the slider 24. A telescopic rod 26 is slidably installed in the shrinking tube 25, and the other end of the telescopic rod 26 is fixedly connected to one side of the storage box 28. A No. 3 cylinder 27 is arranged between the telescopic tubes 25 and is fixedly installed on the slider 24. The piston rod of the No. 3 cylinder 27 is fixedly connected to the storage box 28. A knife seat is provided on one side of the storage box 28, and a scraper 29 is slidably installed on the knife seat. When working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are treated with an anti-corrosion spraying device, the pipe fittings are fixed and then the spraying ... The first gear 7 drives the conical chuck 6 to rotate the pipe fitting, the moving motor 12 is started to drive the first screw rod 10 to rotate, the first screw rod 10 drives the spray box 13 to move from one end of the base 1 to one end of the pipe fitting through the guide rod 11, the spray box 13 slides from the outside of the moving plate 5 when moving, drives the spray head 17 to move to the spraying position at one end of the pipe fitting, the adjustment motor 23 is started to drive the second screw rod 22 to rotate, the second screw rod 22 drives the slider 24 to slide in the fixed frame 21, and the slider 24 drives the scraper 29 to move up and down through the storage box 28. The third cylinder 27 is started to push the scraper 29 to move to one side of the pipe fitting. At the same time, the telescopic rod 26 slides outward in the telescopic cylinder 25 to move the scraper 29 to the side below the pipe fitting so that the blade of the scraper 29 is tangent to the pipe fitting. The spraying device is started to spray the pipe fitting. After the pipe fitting is sprayed, it rotates to the scraper 29. The scraper 29 smoothes the coating and collects excess paint in the storage box 28 to prevent the paint from forming droplets at the bottom of the pipe fitting under the action of gravity, forming paint bulges, and making the spraying surface uneven.

[0025] A bidirectional screw 3 is arranged inside the slide rail 2, and both ends of the bidirectional screw 3 are rotatably mounted in the slide rail 2 through bearings, and the movable plates 5 are slidably mounted at both ends of the bidirectional screw 3, and a clamping motor 4 is fixedly mounted at one end of the slide rail 2, and the rotating shaft of the clamping motor 4 is fixedly connected to one end of the bidirectional screw 3; when working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are subjected to anti-corrosion treatment using a spraying device, the pipe fittings are hoisted above the base 1, and the clamping motor 4 is started to drive the bidirectional screw 3 to rotate, driving the two movable plates 5 to move relative to each other in the slide rail 2, and the movable plate 5 drives the conical chuck 6 to clamp and position the pipe fittings at both ends, so as to realize the positioning and fixation of pipe fittings of different lengths.

[0026] A rotating motor 8 is fixedly installed at the lower end of the outer side of the movable plate 5, and a second gear 9 is fixedly installed on the rotating shaft of the rotating motor 8, and the second gear 9 is meshed with the first gear 7; when working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are treated with anti-corrosion by using a spraying device, the rotating motor 8 is started, and the rotating shaft of the rotating motor 8 drives the second gear 9 to rotate, the second gear 9 drives the first gear 7 to rotate, and the first gear 7 drives the conical chuck 6 to rotate, so that the pipe fittings start to rotate at a uniform speed, so that the paint spraying is more uniform.

[0027] A storage box 20 is fixedly installed on the box body on one side of the spray box 13, and a water pump 19 is fixedly installed on the top of the storage box 20. The water inlet end of the water pump 19 is fixedly connected to the storage box 20, and the lower end extends to the bottom of the storage box 20. The water outlet end of the water pump 19 is fixedly connected to a hose 18, and the other end of the hose 18 passes through the spray box 13 and is fixedly connected to one side of the nozzle 17; when working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are treated with anti-corrosion by using a spray device, the water pump 19 is started, and the water pump 19 draws the paint in the storage box 20 through the water inlet pipe, and then pumps it into the nozzle 17 through the hose 18, and the pipe fittings are sprayed through the nozzle 17. During the spraying process, the storage box 20 moves simultaneously with the spray box 13, which is convenient for the transportation of the paint.

[0028] A No. 2 cylinder 16 is fixedly installed on one side of the upper end of the spray box 13, and the piston rod of the No. 2 cylinder 16 is fixedly connected to the fixed block 14; when working, in the process of producing ductile iron parts, when the ductile iron pipe fittings are treated with anti-corrosion by using a spray device, the No. 2 cylinder 16 is started to drive the fixed block 14 to slide in the sliding hole at the top of the spray box 13, and the fixed block 14 drives the nozzle 17 to move through the No. 1 cylinder 15, so that the nozzle 17 can cover a wider spraying area, thereby improving the spraying efficiency and the operating range.

[0029] A mounting hole is provided in the middle of the box body on the other side of the spray box 13, and a wind tube 30 is arranged outside the mounting hole and fixedly mounted on the spray box 13. A plurality of filter holes are provided on the outer end of the wind tube 30, and a fan 31 is fixedly mounted inside the wind tube 30. An electric heating wire 32 is arranged in the mounting hole and fixedly mounted in the spray box 13. During operation, in the process of producing ductile iron parts, when the ductile iron pipe fittings are subjected to anti-corrosion treatment by using a spray device, the electric heating wire 32 and the wind fan 31 are started, and the wind fan 31 draws outside air through the wind tube 30, and then filters out dust in the air through the filter holes on the wind tube 30, and heats the paint applied on the pipe fittings through the electric heating wire 32 in the spray box 13 to air-dry them.

[0030] Working principle: when using the spraying device to perform anti-corrosion treatment on ductile iron pipe fittings during the production of ductile iron fittings, after fixing the pipe fittings, the conical chuck 6 is driven by the first gear 7 to drive the pipe fittings to rotate, the moving motor 12 is started to drive the first screw rod 10 to rotate, and the first screw rod 10 drives the spray box 13 to move from one end of the base 1 to one end of the pipe fitting through the guide rod 11. When the spray box 13 moves, it slides from the outside of the moving plate 5, driving the spray head 17 to move to the spraying position at one end of the pipe fitting, and the adjusting motor 23 is started to drive the second screw rod 22 to rotate, and the second screw rod 22 drives the slider 24 to move in the fixed frame 21. The slider 24 drives the scraper 29 to move up and down through the storage box 28, and the No. 3 cylinder 27 is started to push the scraper 29 to move to the side of the pipe. At the same time, the telescopic rod 26 slides outward in the telescopic cylinder 25, and the scraper 29 is moved to the side below the pipe, so that the blade of the scraper 29 is tangent to the pipe, and the spraying device is started to spray the pipe. After the pipe is sprayed, it rotates to the scraper 29, and the scraper 29 smoothes the coating and collects excess paint in the storage box 28 to prevent the paint from forming droplets at the bottom of the pipe under the action of gravity, forming paint bulges, and making the spraying surface uneven.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A ductile iron casting production spraying device, characterized in that: The invention comprises a base (1); a slide rail (2) is fixedly mounted on the upper part of the base (1); movable plates (5) are arranged at both ends of the upper part of the base (1) and are slidably mounted on the slide rail (2); a threaded hole is opened on one side of the lower end of the movable plate (5); a conical chuck (6) is arranged on the inner side of the upper end of the movable plate (5); the outer end of the conical chuck (6) is rotatably mounted on the movable plate (5) through a bearing; and a first gear (7) is fixedly mounted through the movable plate (5); a guide rod (11) is arranged on one side of the slide rail (2) and is fixedly mounted on the base (1); and a guide rod (11) is arranged on the other side of the slide rail (2) and is fixedly mounted on the base (1). A first screw rod (10) is arranged, and both ends of the first screw rod (10) are rotatably mounted on a base (1) through bearings, a movable motor (12) is fixedly mounted on one end of the base (1), and a rotating shaft of the movable motor (12) is fixedly connected to one end of the first screw rod (10), and a spray box (13) is arranged on the upper part of the base (1), a sliding hole is opened on the top of the spray box (13), and a fixed block (14) is slidably mounted inside the sliding hole, and a No. 1 cylinder (15) is fixedly mounted on the top of the fixed block (14), and a spray head (17) is fixedly mounted on the front end of the piston rod of the No. 1 cylinder (15); A fixing frame (21) is fixedly installed on the inner wall of one side of the spray box (13), an adjusting motor (23) is fixedly installed at the top center of the fixing frame (21), a second screw rod (22) is rotatably installed in the fixing frame (21), the rotating shaft of the adjusting motor (23) is fixedly connected to the upper end of the second screw rod (22), a slider (24) is slidably arranged in the fixing frame (21), a threaded hole is opened inside the slider (24), and the slider (24) is slidably installed on the second screw rod (22), the Telescopic cylinders (25) are fixedly installed on both sides of the inner end of the slider (24), a telescopic rod (26) is slidably installed in the telescopic cylinder (25), and the other end of the telescopic rod (26) is fixedly connected to one side of the material storage box (28). A No. 3 cylinder (27) is arranged between the telescopic cylinders (25) and fixedly installed on the slider (24), and the piston rod of the No. 3 cylinder (27) is fixedly connected to the material storage box (28). A knife seat is opened on one side of the interior of the material storage box (28), and a scraper (29) is slidably installed on the knife seat.

2. A ductile iron casting production spraying device according to claim 1, characterized in that: A bidirectional screw (3) is arranged inside the slide rail (2), and both ends of the bidirectional screw (3) are rotatably mounted in the slide rail (2) through bearings. The movable plate (5) is slidably mounted on both ends of the bidirectional screw (3), and a clamping motor (4) is fixedly mounted on one end of the slide rail (2). The rotating shaft of the clamping motor (4) is fixedly connected to one end of the bidirectional screw (3).

3. A ductile iron casting production spraying device according to claim 1, characterized in that: A rotating motor (8) is fixedly mounted on the lower outer end of each of the movable plates (5); a second gear (9) is fixedly mounted on the rotating shaft of the rotating motor (8); and the second gear (9) is meshed with the first gear (7).

4. A ductile iron casting production spraying device according to claim 1, characterized in that: A material storage box (20) is fixedly installed on a box body on one side of the spray box (13), and a water pump (19) is fixedly installed on the top of the material storage box (20). The water inlet end of the water pump (19) is fixedly connected to the material storage box (20), and the lower end extends to the bottom of the material storage box (20). The water outlet end of the water pump (19) is fixedly connected to a hose (18), and the other end of the hose (18) passes through the spray box (13) and is fixedly connected to one side of the nozzle (17).

5. A ductile iron casting production spraying device according to claim 1, characterized in that: A No. 2 air cylinder (16) is fixedly mounted on one side of the upper end of the spray box (13), and the piston rod of the No. 2 air cylinder (16) is fixedly connected to the fixed block (14).

6. A ductile iron casting production spraying device according to claim 1, characterized in that: A mounting hole is provided in the middle of the box body on the other side of the spray box (13), and a wind tube (30) is arranged outside the mounting hole and fixedly mounted on the spray box (13). A plurality of filter holes are provided on the outer end of the wind tube (30), and a fan (31) is fixedly mounted inside the wind tube (30). An electric heating wire (32) is arranged in the mounting hole and fixedly mounted in the spray box (13).