Workpiece cleaning device for powder spraying coating assembly line

Abstract

The invention discloses a powder spraying coating assembly line workpiece cleaning device and belongs to the field of workpiece cleaning, the powder spraying coating assembly line workpiece cleaning device comprises a cleaning box with an opening in the top and a top plate located above the cleaning box, and driving rods are symmetrically installed on the upper surface of the top plate and connected with an external driving source; two positioning plates with U-shaped sections are fixed to the lower surface of the top plate through a plurality of first connecting rods, and a workpiece is located between the two positioning plates. A spraying plate capable of moving up and down is arranged in the cleaning box, a plurality of nozzles are arranged on the top wall of the spraying plate in an array mode, a water inlet pipe is connected to the bottom wall of the spraying plate, one end of the water inlet pipe is connected with a water pump, and the water pump is installed on the bottom wall of the cleaning box; impurities on the surface of a workpiece and in holes can be effectively cleaned, it is guaranteed that the workpiece is clean, and follow-up powder spraying coating machining is facilitated.

Description

Technical Field

[0004] The present invention relates to the field of workpiece cleaning, and particularly to a workpiece cleaning device for a powder spraying and painting production line. Background Art

[0005] The powder spraying and painting production line is a relatively popular product in the production line market. The seven major components of the painting production line mainly include: pretreatment equipment, powder spraying system, painting equipment, baking furnace, heat source system, electric control system, suspension conveyor chain, etc. It is applicable to the painting and powder spraying treatment of the workpiece surface and is mostly used for the painting operation of single-piece or small-batch workpieces.

[0006] Among them, the pretreatment equipment mainly uses mechanical scouring to accelerate chemical reactions to complete processes such as degreasing, phosphating, and water washing. Cleaning the workpiece surface is the core link of pretreatment, which directly affects the coating quality and process stability. Currently, when scouring, the workpiece surface is mainly cleaned by nozzles. However, for some special workpieces, such as ventilation plates and porous box shells in sheet metal parts, which have multiple holes and impurities in the holes are difficult to be comprehensively cleaned. After powder spraying, it will affect the uniformity of the coating, resulting in insufficient coverage at the hole edges, and affecting the quality and service life of the workpiece. Summary of the Invention

[0007] The purpose of the present invention is to provide a workpiece cleaning device for a powder spraying and painting production line to solve the following technical problems: Currently, when scouring, the workpiece surface is mainly cleaned by nozzles. However, for some special workpieces, such as ventilation plates and porous box shells in sheet metal parts, which have multiple holes and impurities in the holes are difficult to be comprehensively cleaned. After powder spraying, it will affect the uniformity of the coating, resulting in insufficient coverage at the hole edges, and affecting the quality and service life of the workpiece.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A workpiece cleaning device for a powder spraying and painting production line includes a cleaning box with an open top and a top plate located above the cleaning box. Driving rods are symmetrically installed on the upper surface of the top plate, and the driving rods are connected to an external driving source. Two U-shaped positioning plates are fixed to the lower surface of the top plate by multiple first connecting rods, and the workpiece is located between the two positioning plates;

[0010] A spray plate that can move up and down is arranged in the cleaning box. A plurality of nozzles are arranged in an array on the top wall of the spray plate. A water inlet pipe is connected to the bottom wall of the spray plate, and one end of the water inlet pipe is connected to a water pump. The water pump is installed on the bottom wall of the cleaning box, and a filter cover is arranged outside the water pump. A first limiting block is arranged on the inner wall of the cleaning box;

[0011] Rectangular holes are formed at the four corners of the spraying plate, and second connecting rods are symmetrically arranged at the bottom of each positioning plate. One end of each second connecting rod is fixed with a rectangular rubber block, and the size of the rectangular rubber block is larger than that of the rectangular hole.

[0012] As a further scheme of the present invention: A plurality of movable rods are fixed on the bottom wall of the cleaning tank. One end of each movable rod is fixedly connected to the spraying plate, and the other end is connected with a movable block. A first spring is connected between the movable block and the bottom wall of the cleaning tank.

[0013] As a further scheme of the present invention: A second limiting block is fixed on the side wall of the movable rod, and the second limiting block is located outside the cleaning tank.

[0014] As a further scheme of the present invention: A baffle is fixed on the lower surface of the top plate through a support rod, and the bottom of the baffle contacts the workpiece.

[0015] As a further scheme of the present invention: The baffle is of a rectangular hollow structure. An air storage tank is fixed on the lower surface of the top plate. An air inlet pipe is connected to the air storage tank. The air inlet pipe is connected to an external air source. The air storage tank is communicated with the cavity of the baffle through a connecting pipe. A movable plate is movably arranged on the baffle, and both ends of the movable plate extend to the outside of the baffle. First air outlets are arranged in an array on the movable plate, and second air outlets are arranged in an array on the bottom wall of the baffle. A plurality of mounting rods are fixed on the top of one side wall of the cleaning tank, and an arc-shaped pushing block is fixed at one end of each mounting rod.

[0016] As a further scheme of the present invention: A one-way valve is installed on the air inlet pipe.

[0017] As a further scheme of the present invention: A mounting plate is fixed on the side wall of the baffle away from the arc-shaped pushing block. A second spring is connected to the mounting plate, and one end of the second spring is connected to the movable plate.

[0018] As a further scheme of the present invention: L-shaped rods are fixed on both side walls of the cleaning tank, and a placing plate is fixed at one end of each L-shaped rod.

[0019] The beneficial effects of the present invention:

[0020] (1) By arranging two positioning plates in the present invention, the workpiece is placed between the two positioning plates. The water pump is started, and the cleaning liquid is sprayed onto the groove of the workpiece through the nozzle. The first connecting rod fixes the position of the nozzle relative to the workpiece, ensuring an appropriate flushing distance, and flushing the impurities on the surface of the workpiece clean. The top plate and the spraying plate can descend, and the spraying plate enters the liquid surface. Blocked by the cleaning liquid, the water flow decreases, and the gentle water flow softens the impurities in the holes. When the workpiece contacts the liquid surface, the impurities in the holes are loosened and removed by air pressure and water pressure;

[0021] (2) The present invention is provided with a baffle plate which contacts the workpiece, so that during cleaning, the cleaning liquid can be prevented from spilling to the outside through the holes, and the cleaning effect on the blocked holes is improved.

[0022] (3) The present invention is provided with structures such as an air storage tank, an air inlet pipe, a movable plate and an arc-shaped push block. While the workpiece is descending, the air storage tank is inflated by an external air source, and the air pressure in the air storage tank gradually increases. When the movable plate contacts the arc-shaped push block, it is pushed, so that the first air outlet and the second air outlet are aligned, and the high-pressure gas is instantaneously blown towards the holes of the workpiece, completely removing the impurities in the holes. Description of the Drawings

[0023] The present invention will be further described below with reference to the drawings.

[0024] Figure 1 is a schematic structural diagram of the first embodiment of the present invention;

[0025] Figure 2 is a schematic internal structural diagram of the cleaning tank in the first embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of the spraying plate and the rectangular rubber block in the first embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of the second embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of the air storage tank and the baffle plate in the second embodiment of the present invention;

[0029] Figure 6 is a schematic structural diagram of the baffle plate and the movable plate in a disassembled state in the second embodiment of the present invention;

[0030] Figure 7 is Figure 4 an enlarged view of part A in

[0031] In the figure: 1. Cleaning tank; 2. Top plate; 3. Driving rod; 4. First connecting rod; 5. Positioning plate; 6. Spraying plate; 7. Second connecting rod; 8. Water inlet pipe; 9. Filter cover; 10. Movable rod; 11. Movable block; 12. First spring; 13. First limit block; 14. Second limit block; 15. Rectangular rubber block; 16. Rectangular hole; 17. L-shaped rod; 18. Placing plate; 19. Support rod; 20. Baffle plate; 21. Air storage tank; 22. Air inlet pipe; 23. Connecting pipe; 24. Movable plate; 25. First air outlet; 26. Second air outlet; 27. Mounting plate; 28. Second spring; 29. Mounting rod; 30. Arc-shaped push block.

[0032] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the present invention; for a better illustration of this embodiment, some components in the drawings may be omitted, enlarged or reduced, which do not represent the dimensions and shapes of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Detailed implementation manners

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: Please refer to Figures 1 to 3 As shown, the present invention is a workpiece cleaning device for a powder spraying production line, including a cleaning tank 1 with an open top and a top plate 2 located above the cleaning tank 1. Driving rods 3 are symmetrically installed on the upper surface of the top plate 2, and the driving rods 3 are connected to an external driving source. Two U-shaped positioning plates 5 are fixed to the lower surface of the top plate 2 through a plurality of first connecting rods 4, and the workpiece is located between the two positioning plates 5. A spray plate 6 that can move up and down is arranged in the cleaning tank 1. A plurality of nozzles are arranged in an array on the top wall of the spray plate 6. A water inlet pipe 8 is connected to the bottom wall of the spray plate 6, and one end of the water inlet pipe 8 is connected to a water pump. The water pump is installed on the bottom wall of the cleaning tank 1, and a filter cover 9 is arranged outside the water pump. A first limiting block 13 is arranged on the inner wall of the cleaning tank 1. Rectangular holes 16 are opened at the four corners of the spray plate 6. Second connecting rods 7 are symmetrically arranged at the bottom of each positioning plate 5. A rectangular rubber block 15 is fixed to one end of the second connecting rod 7, and the size of the rectangular rubber block 15 is larger than the size of the rectangular hole 16. Place the workpiece between the two positioning plates 5, start the water pump, spray the cleaning liquid onto the grooves of the workpiece through the nozzles to clean the surface impurities, and then drive the positioning plate 5 to descend by using an external driving source. The positioning plate 5 and the spray plate 6 descend synchronously, and the first connecting rod 4 keeps the distance between the nozzles and the workpiece fixed to ensure an appropriate flushing distance. When the spray plate 6 contacts the first limiting block 13, it stops descending. At this time, the rectangular rubber block 15 disengages from the rectangular hole 16, and the workpiece can continue to descend and approach the liquid level. The spray plate 6 is located below the liquid level. Blocked by the cleaning liquid, the water flow decreases, and the impurities in the holes are softened by the water flow. And when the workpiece contacts the liquid level, the stubborn impurities in the holes are further loosened by the air pressure and water pressure. It should be noted that the external driving source is an electric push rod.

[0035] Refer to Figure 2, a plurality of movable rods 10 are fixed on the bottom wall of the cleaning tank 1. One end of the movable rod 10 is fixedly connected to the spraying plate 6, and the other end is connected to a movable block 11. A first spring 12 is connected between the movable block 11 and the bottom wall of the cleaning tank 1; the movable rod 10 limits and guides the spraying plate 6 to ensure its stable descent or reset.

[0036] Refer to Figure 2 , a second limiting block 14 is fixed on the side wall of the movable rod 10, and the second limiting block 14 is located outside the cleaning tank 1. The second limiting block 14 limits the stroke of the movable rod 10.

[0037] Embodiment 2: In order to prevent the cleaning liquid from being sprayed to the outside through some holes, in this embodiment, refer to Figure 4 and Figure 5 As shown, a baffle 20 is fixed on the lower surface of the top plate 2 through a support rod 19, and the bottom of the baffle 20 contacts the workpiece; the baffle 20 can prevent the cleaning liquid from being sprayed to the outside, so that the cleaning liquid can fully soften the stubborn impurities in the holes.

[0038] Refer to Figures 4 to 7 , the baffle 20 is a rectangular hollow structure. An air storage tank 21 is fixed on the lower surface of the top plate 2. An air inlet pipe 22 is connected to the air storage tank 21. The air inlet pipe 22 is connected to an external air source. The air storage tank 21 is communicated with the cavity of the baffle 20 through a connecting pipe 23. A movable plate 24 is movably arranged on the baffle 20, and both ends of the movable plate 24 extend to the outside of the baffle 20. A first air outlet 25 is arranged in an array on the movable plate 24, and a second air outlet 26 is arranged in an array on the bottom wall of the baffle 20. A plurality of mounting rods 29 are fixed on the top of one side wall of the cleaning tank 1. One end of the mounting rod 29 is fixed with an arc-shaped push block 30. A one-way valve is installed on the air inlet pipe 22. A mounting plate 27 is fixed on the side wall of the baffle 20 away from the arc-shaped push block 30. A second spring 28 is connected to the mounting plate 27. One end of the second spring 28 is connected to the movable plate 24; in order to further remove the impurities in the holes, when the workpiece descends, an external air source is used to inflate the air storage tank 21 at the same time. In the initial state, the movable plate 24 blocks the second air outlet 26, and the gas cannot be discharged. The air pressure inside the air storage tank 21 gradually increases. When the movable plate 24 contacts the arc-shaped push block 30, the movable plate 24 is pushed, so that the first air outlet 25 and the second air outlet 26 are aligned, and the high-pressure gas is instantly blown towards the holes of the workpiece, completely removing the impurities in the holes; it should be noted that the external air source is a blower.

[0039] Refer to Figure 1 , L-shaped rods 17 are fixed on both side walls of the cleaning tank 1. One end of the L-shaped rod 17 is fixed with a placement plate 18; the placement plates 18 on both sides are respectively used to place the workpiece to be cleaned and the cleaned workpiece.

[0040] Working principle of the present invention: Add an appropriate amount of cleaning liquid into the cleaning tank 1, place the workpiece between the two positioning plates 5, first start the water pump, spray the cleaning liquid through the nozzle onto the groove of the workpiece, and wash away the adhered impurities. There will also be impurities in the holes of the workpiece. After flushing for a period of time, use an external driving source to drive the top plate 2 to descend. Since the size of the rectangular rubber block 15 is larger than the size of the rectangular hole 16, under the action of friction, the second connecting rod 7 and the spraying plate 6 descend synchronously with the positioning plate 5. The spraying plate 6 first moves below the liquid level. Blocked by the cleaning liquid, the water flow decreases, and the water flow is used to soften the impurities in the holes. When the spraying plate 6 touches the first limit block 13, it stops descending, while the top plate 2 continues to descend. At this time, the rectangular rubber block 15 disengages from the rectangular hole 16, and the workpiece can continue to descend and approach the liquid level. When the workpiece touches the liquid level, use air pressure and water pressure to further loosen and remove the stubborn impurities in the holes. Then turn off the water pump;

[0041] When the workpiece descends, at the same time, use an external air source to inflate the air storage tank 21. In the initial state, the movable plate 24 blocks the second air outlet 26, and the gas cannot be discharged. The internal air pressure of the air storage tank 21 gradually increases. The baffle 20 descends together with the top plate 2. When the movable plate 24 touches the arc-shaped push block 30, the movable plate 24 is pushed and compresses the second spring 28, so that the first air outlet 25 and the second air outlet 26 are aligned. The high-pressure gas instantly blows towards the holes of the workpiece, completely removing the loosened impurities in the holes. The impurities in the holes can be completely removed, improving the cleaning effect and facilitating the subsequent processing of the workpiece. After one workpiece is cleaned, use an external driving source to drive the top plate 2 to reset, remove the cleaned workpiece, put in the uncleaned workpiece again, and repeat the above operations to clean again. The operator only needs to replace the cleaning liquid regularly.

[0042] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A workpiece cleaning device for a powder coating assembly line, comprising a cleaning box (1) with an opening on the top and a top plate (2) located above the cleaning box (1), characterized in that: A driving rod (3) is symmetrically mounted on the upper surface of the top plate (2), and the driving rod (3) is connected to an external driving source. Two positioning plates (5) with U-shaped cross sections are fixed to the lower surface of the top plate (2) via a plurality of first connecting rods (4), and the workpiece is located between the two positioning plates (5); The cleaning box (1) is provided with a spray plate (6) which can move up and down, a plurality of spray heads are arranged in an array on the top wall of the spray plate (6), a water inlet pipe (8) is connected to the bottom wall of the spray plate (6), and one end of the water inlet pipe (8) is connected to a water pump, the water pump is installed on the bottom wall of the cleaning box (1), and a filter cover (9) is arranged outside the water pump, and a first limit block (13) is arranged on the inner wall of the cleaning box (1); Rectangular holes (16) are provided at the four corners of the spray plate (6), and a second connecting rod (7) is symmetrically arranged at the bottom of each positioning plate (5). A rectangular rubber block (15) is fixed to one end of the second connecting rod (7), and the size of the rectangular rubber block (15) is larger than the size of the rectangular hole (16).

2. A powder coating line workpiece cleaning device according to claim 1, characterized in that: A plurality of movable rods (10) are fixed on the bottom wall of the cleaning box (1), one end of the movable rod (10) is fixedly connected to the spray plate (6), and the other end is connected to a movable block (11), and a first spring (12) is connected between the movable block (11) and the bottom wall of the cleaning box (1).

3. A workpiece cleaning device for a powder coating line according to claim 2, characterized in that: A second limiting block (14) is fixed on the side wall of the movable rod (10), and the second limiting block (14) is located outside the cleaning box (1).

4. A powder coating line workpiece cleaning device according to claim 1, characterized in that: A baffle (20) is fixed to the lower surface of the top plate (2) via a support rod (19), and the bottom of the baffle (20) is in contact with the workpiece.

5. A powder coating line workpiece cleaning device according to claim 4, characterized in that: The baffle (20) is a rectangular hollow structure. An air storage box (21) is fixed on the lower surface of the top plate (2). An air intake pipe (22) is connected to the air storage box (21). The air intake pipe (22) is connected to an external air source. The air storage box (21) is connected to the cavity of the baffle (20) through a connecting pipe (23). A movable plate (24) is movably provided on the baffle (20), and both ends of the movable plate (24) extend to the outside of the baffle (20). A first air outlet (25) is arranged in an array on the movable plate (24). A second air outlet (26) is arranged in an array on the bottom wall of the baffle (20). A plurality of mounting rods (29) are fixed to the top of one side wall of the cleaning box (1), and an arc-shaped push block (30) is fixed to one end of the mounting rod (29).

6. A powder coating line workpiece cleaning device according to claim 5, characterized in that: A one-way valve is installed on the air inlet pipe (22).

7. A powder coating line workpiece cleaning device according to claim 5, characterized in that: A mounting plate (27) is fixed on the side wall of the baffle (20) away from the arc-shaped push block (30), a second spring (28) is connected to the mounting plate (27), and one end of the second spring (28) is connected to the movable plate (24).

8. The workpiece cleaning device for a powder coating line according to claim 1, characterized in that: An L-shaped rod (17) is fixed on both side walls of the cleaning box (1), and a placement plate (18) is fixed on one end of the L-shaped rod (17).

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