A surface coating device for metal products

Abstract

This invention relates to the field of surface treatment equipment technology, and more specifically, to a surface coating device for metal products, comprising a spray gun, a coating control mechanism, and a receiving base mechanism; the rear end of the spray gun is connected to the receiving base mechanism; the coating control mechanism includes a fixed base fixed to the spray gun body, with a side plate unit fixed to each of the left and right ends of the fixed base, and two opposing spray width adjustment units slidingly engaged on the inner sides of the two side plate units, the two spray width adjustment units being positioned opposite each other at the upper and lower ends of the spray gun; the two spray width adjustment units are connected by a spring-loaded limiting unit connected to the outside of one of the side plate units; the two spray width adjustment units and the front ends of the two side plate units form a coating spray nozzle. The coating spray range can be adjusted by regulating the relative positions of the two spray width adjustment units within the two side plate units, facilitating more precise coating treatment according to the size or position of the surface to be coated.

Description

Technical Field

[0001] This invention relates to the field of surface treatment equipment technology, and more specifically, to a surface coating apparatus for metal products. Background Technology

[0002] In modern industry and daily life, metal corrosion is ubiquitous, especially in storage containers for fuel oil and hazardous chemicals, where crevice corrosion, stress corrosion, and corrosion fatigue pose significant safety hazards to people's lives. Currently, the main method of metal protection involves coating the surface of metal products with a coating technique, including painting, electroplating, chemical plating, thermal spraying, and vapor deposition.

[0003] Existing coating spraying devices have limitations in that they cannot control the range of the coating nozzle. During the spraying process, the size of the coating nozzle cannot be adjusted according to the location to be sprayed, making it impossible to accurately coat the required areas. Furthermore, they are prone to spraying onto unwanted areas, affecting the coating quality. Summary of the Invention

[0004] The purpose of this invention is to provide a surface coating device for metal products, which can effectively solve the problems in the prior art.

[0005] This invention provides a surface coating device for metal products, comprising a spray gun, a coating control mechanism, and a receiving base mechanism; the rear end of the spray gun is connected to the receiving base mechanism; the coating control mechanism includes a fixed base fixed to the spray gun body, with a side plate unit fixed to each of the left and right ends of the fixed base, and two opposing spray width adjustment units slidingly engaged on the inner sides of the two side plate units, the two spray width adjustment units being positioned opposite each other at the upper and lower ends of the spray gun; the two spray width adjustment units are connected by a spring-loaded limiting unit connected to the outside of one of the side plate units; the front ends of the two spray width adjustment units and the two side plate units form a coating spray nozzle.

[0006] Optionally, the receiving base mechanism includes a receiving frame, a rotary drive motor, and a drive gear; the rear end of the spray gun is rotatably connected to the receiving frame; the drive gear is fixed on the output shaft of the rotary drive motor, and the drive gear meshes with and transmits through the rotary gear fixed to the rear end of the spray gun; the movable material tube is rotatably and sealed inside the feed port at the rear end of the spray gun.

[0007] Optionally, the two fan-shaped holes of the front air cap of the spray gun are located on both sides of the central main spray hole of the spray gun, and each of the fan-shaped holes is located between the main spray hole and a side plate unit.

[0008] Optionally, the side plate unit includes a side plate body, a side adjustment plate, a linkage block, and a side adjustment rod; the rear end of the side plate body is fixed to the side end of the fixing seat; the front end of the side plate body is provided with left and right slides that pass through the side plate body, the left and right slides are sealed and slidably fitted with the side adjustment plate, the outer end of the side adjustment plate is fixed with a linkage block, the linkage block is threadedly fitted in the middle of the side adjustment rod, and the inner end of the side adjustment rod is rotatably fitted on the outer surface of the side plate body.

[0009] Optionally, a metal product surface coating device further includes a return plate, which is fixed to the lower end of the side plate body and the fixing seat of the two side plate units. The center of the return plate is provided with a return trough, which is used to collect the liquid material that falls through the two spray width adjustment units, the two side plate bodies and the two side control plates. The bottom of the return plate is provided with a return pipe that is connected and communicates with the return trough. An electrically controlled valve is provided on the return pipe.

[0010] Optionally, the elastic limiting unit includes a horizontal guide rod, a horizontal slide, a compression spring, a rod seat, and a movable connecting rod; the rear end of the horizontal guide rod is fixed to the rod seat, the rod seat is fixed to the rear end of the outer side of a side plate body, the horizontal guide rod is slidably fitted with the horizontal slide, the upper and lower ends of the horizontal slide are respectively rotatably connected to a movable connecting rod, and the other ends of the two movable connecting rods are rotatably connected to two spray amplitude adjustment units one by one; a compression spring is sleeved on the horizontal guide rod, and the two ends of the compression spring are respectively fixedly connected to the rod seat and the horizontal slide.

[0011] Optionally, the horizontal guide rod is an externally threaded rod structure, with a limiting nut threaded onto the horizontal guide rod. The limiting nut is located at the end of the horizontal slide away from the compression spring.

[0012] Optionally, the spray pattern adjustment unit includes a lifting slide, a rotating shaft, a spray pattern adjustment plate, a worm gear, and an adjusting worm. The lifting slide is slidably fitted in the longitudinal slide rails at the rear ends of the two side plate bodies. The lower end of the front side of the lifting slide is rotatably connected to the rotating shaft, and the rotating shaft is fixedly connected to the rear end of the spray pattern adjustment plate. The spray pattern adjustment plate is slidably fitted in a sealed manner on the inner surfaces of the two side plate bodies. A worm gear is fixed on the rotating shaft, and the worm gear meshes with the adjusting worm rotating on the lifting slide. A screwing block is fixed at one end of the adjusting worm.

[0013] Optionally, the spray width adjustment unit further includes a rotating sleeve, a telescopic slide rod, an adjusting screw, a fixed limiting wheel, and a movable limiting wheel; the rear end of the rotating sleeve is rotatably connected to the lifting slide, and the front end of the rotating sleeve is slidably connected to the rear end of the telescopic slide rod. A fixed limiting slide is on the telescopic slide rod, and the middle part of the limiting slide slide slides within the limiting slide track of the rotating sleeve. The outer end of the limiting slide is threadedly engaged with the middle part of the adjusting screw, and the adjusting screw rotates on the rotating sleeve via a vertical seat; the fixed limiting wheel is rotatably connected to the smooth rod body at the front end of the telescopic slide rod, and the movable limiting wheel is threadedly engaged with the externally threaded rod body at the front end of the telescopic slide rod. A fastening bolt is threadedly engaged on the movable limiting wheel, and the inner end of the fastening bolt presses against the externally threaded rod body at the front end of the telescopic slide rod; the fixed limiting wheel is located between the movable limiting wheel and the rotating sleeve.

[0014] Optionally, the spray width adjustment plate is located behind the side control plate; multiple drop holes are arranged sequentially from front to back on the spray width adjustment plate located below the spray gun, so that the blocked liquid falls into the return groove of the return plate through the multiple drop holes.

[0015] The beneficial effects of this invention are:

[0016] The present invention discloses a metal product surface coating device, which internally comprises a coating spray nozzle consisting of two spray width adjustment units and two side plate units. The coating spray range can be adjusted by adjusting the relative positions of the two spray width adjustment units within the two side plate units, facilitating more precise coating treatment according to the size or position of the surface to be coated. The device also allows for the recovery of liquid material blocked during the spraying process through the cooperation of the two spray width adjustment units, the two side plate units, and the return plate, thereby improving the utilization rate of the liquid material.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 Overall illustration provided for embodiments of the present invention Figure 1 ;

[0020] Figure 2 Overall illustration provided for embodiments of the present invention Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of a spray gun provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the coating control mechanism provided in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the receiving base mechanism provided in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the side plate unit provided in an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the spray width adjustment unit located above the spray gun according to an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the spray width adjustment unit located below the spray gun according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the elastic limiting unit provided in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of the recycling plate provided in an embodiment of the present invention.

[0029] Icons: 1. Spray gun; 101. Rotary gear; 102. Movable material tube; 103. Fan-shaped hole; 104. Main spray nozzle; 2. Coating control mechanism; 3. Mounting base mechanism; 301. Rotary drive motor; 302. Drive gear; 303. Fixed base; 4. Side plate unit; 5. Side plate body; 501. Side control plate; 502. Linkage block; 503. Side control rod; 504. Spray width adjustment unit; 6. Lifting slide; 601. Rotary shaft; 602. Spray width adjustment plate; 603. Worm gear; 604. Adjusting worm; 605. Rotating sleeve; 606. Telescopic slide; 607. Adjusting screw; 608. Fixed limit wheel; 609. Movable limit wheel; 610. Elastic limit unit; 7. Horizontal guide rod; 701. Horizontal slide; 702. Compression spring; 703. Rod seat; 704. Movable connecting rod; 705. Limit nut; 706. Return plate; 8. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0034] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this application, should still fall within the scope of the technical content disclosed in this application. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application.

[0035] The following is in conjunction with the appendix Figure 1-10 The present invention will be described in further detail below.

[0036] Example 1

[0037] like Figure 1-10As shown, a metal product surface coating device includes a spray gun 1, a coating control mechanism 2, and a receiving base mechanism 3. The rear end of the spray gun 1 is connected to the receiving base mechanism 3. The coating control mechanism 2 includes a fixed base 4 fixed to the body of the spray gun 1. A side plate unit 5 is fixed to the left and right ends of the fixed base 4, and two spray width adjustment units 6 are slidably engaged on the inner sides of the two side plate units 5. The two spray width adjustment units 6 are arranged opposite to each other at the upper and lower ends of the spray gun 1. The two spray width adjustment units 6 are connected to each other by a spring limiting unit 7 connected to the outside of one side plate unit 5. The front ends of the two spray width adjustment units 6 and the two side plate units 5 form a coating spray nozzle.

[0038] In a metal product surface coating device of the present invention, a spray gun 1 is connected to a receiving base mechanism 3. The receiving base mechanism 3 can be connected to a robot or a displacement trolley to control the movement of the spray gun 1 on the receiving base mechanism 3. The present invention has a coating spray nozzle composed of two spray width adjustment units 6 and two side plate units 5, which limits the spraying range. The size of the coating spray nozzle can be adjusted by adjusting the relative position of the two spray width adjustment units 6 within the two side plate units 5, thereby adjusting the coating spraying range and facilitating more precise coating treatment according to the size or position of the surface to be coated. The two spray width adjustment units 6 are connected by an elastic limiting unit 7 connected to the outside of a side plate unit 5. The distance between the two spray width adjustment units 6 can be adjusted by the elastic limiting unit 7, thereby limiting the minimum distance between the two spray width adjustment units 6.

[0039] Example 2

[0040] like Figure 1-10 As shown, the receiving base mechanism 3 includes a receiving frame 301, a rotary drive motor 302, and a drive gear 303; the rear end of the spray gun 1 is rotatably connected to the receiving frame 301; the drive gear 303 is fixed on the output shaft of the rotary drive motor 302, and the drive gear 303 is meshed and transmitted to the rotary gear 101 fixed at the rear end of the spray gun 1; the movable material tube 102 is rotatably and sealed inside the feed port at the rear end of the spray gun 1.

[0041] The receiving frame 301 inside the receiving base mechanism 3 is provided with multiple bolt connection holes, so that the receiving frame 301 can be installed on the robot or the displacement trolley by the cooperation of bolts and nuts, thereby controlling the movement of the spray gun 1 inside the invention, and fixing the position of the invention. By controlling the movement of the workpiece to be coated, the spray coating treatment of the workpiece to be coated can be realized. After the rotary drive motor 302 is started, it can drive the drive gear 303 to rotate. When the drive gear 303 rotates, it can mesh and drive the rotary gear 101 to rotate, thereby controlling the spray gun 1 to rotate at a certain angle. It can also drive the coating control mechanism 2 to rotate in a certain direction through the spray gun 1, changing the orientation of the coating spray nozzle of the coating control mechanism 2 in order to meet more usage needs.

[0042] The two fan-shaped holes 103 of the front wind cap of the spray gun 1 are located on both sides of the central main spray hole 104 of the spray gun 1, and each of the fan-shaped holes 103 is located between the main spray hole 104 and a side plate unit 5.

[0043] Example 3

[0044] like Figure 1-10 As shown, the side plate unit 5 includes a side plate body 501, a side adjustment plate 502, a linkage block 503, and a side adjustment rod 504; the rear end of the side plate body 501 is fixed to the side end of the fixing base 4; the front end of the side plate body 501 is provided with left and right slides that penetrate the side plate body 501, the left and right slides are sealed and slidably fitted with the side adjustment plate 502, the outer end of the side adjustment plate 502 is fixed with the linkage block 503, the linkage block 503 is threadedly fitted to the middle of the side adjustment rod 504, and the inner end of the side adjustment rod 504 is rotatably fitted to the outer surface of the side plate body 501.

[0045] The structure of the side plate unit 5 allows for further adjustment of the size of the internal coating spray nozzle. This adjustment can be made not only by adjusting the distance between the two spray width adjustment units 6, but also by rotating the side control rod 504 to change the contact position between the side control rod 504 and the linkage block 503. This causes the linkage block 503 to drive the side control plate 502 to slide within the left and right slide rails of the side plate body 501, thereby further changing the size of the coating spray nozzle.

[0046] Example 4

[0047] like Figure 1-10 As shown, the metal product surface coating device further includes a return plate 8, which is fixed to the lower end of the side plate body 501 and the fixing seat 4 of the two side plate units 5. The center of the return plate 8 is provided with a return trough, which is used to collect the liquid material that falls through the two spray width adjustment units 6, the two side plate bodies 501 and the two side control plates 502. The bottom of the return plate 8 is provided with a return pipe that is connected and communicates with the return trough. An electrically controlled valve is provided on the return pipe.

[0048] The return trough of the return plate 8 is used to collect the liquid material that falls through the two spray width adjustment units 6, the two side plate bodies 501 and the two side control plates 502, and the collected liquid material can be output through the return pipe. The lower end of the return pipe can be connected to the material cylinder through the output pipe with the return pump.

[0049] Example 5

[0050] like Figure 1-10 As shown, the elastic limiting unit 7 includes a horizontal guide rod 701, a horizontal slide block 702, a compression spring 703, a rod seat 704, and a movable connecting rod 705. The rear end of the horizontal guide rod 701 is fixed on the rod seat 704, and the rod seat 704 is fixed on the rear end of the outer side of a side plate body 501. The horizontal guide rod 701 is slidably fitted with the horizontal slide block 702. The upper and lower ends of the horizontal slide block 702 are respectively rotatably connected to a movable connecting rod 705. The other ends of the two movable connecting rods 705 are rotatably connected to two spray amplitude adjustment units 6. The horizontal guide rod 701 is fitted with a compression spring 703, and the two ends of the compression spring 703 are respectively fixedly connected to the rod seat 704 and the horizontal slide block 702.

[0051] The horizontal guide rod 701 is an externally threaded rod structure, and a limiting nut 706 is threaded onto the horizontal guide rod 701. The limiting nut 706 is located at the end of the horizontal slide block 702 away from the compression spring 703.

[0052] The elastic limiting unit 7 is used to limit the relative position of the two spray width adjustment units 6. Under normal conditions, the two spray width adjustment units 6 can be kept in contact with the upper and lower ends of the spray gun 1 under the elastic force of the compression spring 703. At this time, the coating spray nozzle formed by the two spray width adjustment units 6 and the front ends of the two side plate units 5 is in the minimum state. When it is necessary to adjust the size of the coating spray nozzle to be larger, the two spray width adjustment units 6 are controlled to slide away from each other within the two side plate units 5. At this time, the horizontal slide 702 is pushed, so that the horizontal slide 702... 2. Slide on the horizontal guide rod 701 and compress the compression spring 703. The horizontal slide 702 drives the two spray width adjustment units 6 to slide away from each other in the two side plate units 5 through the two movable connecting rods 705. This increases the distance between the two spray width adjustment units 6, thereby increasing the size of the coating spray nozzle formed at the front end of the two spray width adjustment units 6 and the two side plate units 5. After adjusting to the appropriate position, tighten the limit nut 706 to press it against the end of the horizontal slide 702 away from the compression spring 703. The operation is very convenient.

[0053] Example 6

[0054] like Figure 1-10As shown, the spray pattern adjustment unit 6 includes a lifting slide 601, a rotating shaft 602, a spray pattern adjustment plate 603, a worm gear 604, and an adjusting worm 605. The lifting slide 601 is slidably fitted in the longitudinal slide rails at the rear ends of the two side plate bodies 501. The lower end of the front side of the lifting slide 601 is rotatably connected to the rotating shaft 602. The rotating shaft 602 is fixedly connected to the rear end of the spray pattern adjustment plate 603. The spray pattern adjustment plate 603 is slidably fitted in a sealed manner on the inner surfaces of the two side plate bodies 501. The worm gear 604 is fixed on the rotating shaft 602. The worm gear 604 meshes with the adjusting worm 605 rotating on the lifting slide 601. A screwing block is fixed to one end of the adjusting worm 605.

[0055] The structure of the spray width adjustment unit 6 allows the size of the coating spray nozzle to be adjusted not only by adjusting the distance between the two spray width adjustment units 6, but also by adjusting the tilt angle of the spray width adjustment plate 603 as needed. Furthermore, the orientation of the coating spray nozzle can be changed by adjusting the angle of the spray width adjustment plates 603 of the two spray width adjustment units 6 to meet different coating requirements. During adjustment, rotating the screw block on the adjusting worm 605 causes the adjusting worm 605 to rotate. The rotation of the adjusting worm 605 engages with and drives the worm wheel 604 to rotate, which in turn drives the rotating shaft 602 to rotate. The rotating shaft 602 then causes the spray width adjustment plate 603 to rotate at a certain angle, thereby adjusting the size of the coating spray nozzle or changing the coating spray direction. The structure of the worm wheel 604 and the adjusting worm 605 allows for locking after adjustment, eliminating the need for other limiting mechanisms.

[0056] Example 7

[0057] like Figure 1-10 As shown, the spray width adjustment unit 6 further includes a rotating sleeve 606, a telescopic slide rod 607, an adjusting screw 608, a fixed limiting wheel 609, and a movable limiting wheel 610; the rear end of the rotating sleeve 606 is rotatably connected to the lifting slide 601, the front end of the rotating sleeve 606 is slidably connected to the rear end of the telescopic slide rod 607, a fixed limiting slide is fixed on the telescopic slide rod 607, the middle part of the limiting slide slide slides in the limiting slide track of the rotating sleeve 606, and the outer end of the limiting slide is threaded into the adjusting screw. In the middle of rod 608, the adjusting screw 608 rotates on the rotating sleeve 606 via a vertical seat; the fixed limiting wheel 609 is rotatably connected to the smooth rod body at the front end of the telescopic slide rod 607, and the movable limiting wheel 610 is threadedly engaged with the external threaded rod body at the front end of the telescopic slide rod 607. The movable limiting wheel 610 is threadedly engaged with a fastening bolt, and the inner end of the fastening bolt presses against the external threaded rod body at the front end of the telescopic slide rod 607; the fixed limiting wheel 609 is located between the movable limiting wheel 610 and the rotating sleeve 606.

[0058] The spray width adjustment unit 6 also includes a rotating sleeve 606, a telescopic slide rod 607, an adjusting screw 608, a fixed limiting wheel 609, and a movable limiting wheel 610. When coating the straight plate, the fixed limiting wheel 609 and the movable limiting wheel 610 can be used to block the two sides of the straight plate, thereby providing more precise guidance and limiting of the spray gun 1, preventing uneven spraying caused by the angular deviation of the spray gun 1. Furthermore, the movable limiting wheel 610 is threaded onto the external threaded rod at the front end of the telescopic slide rod 607, so that the movable limiting wheel 610 and the fixed limiting wheel... The distance between 609 can be adjusted to facilitate clamping on straight plates of different sizes, and the relative fixation of the movable limit wheel 610 and the telescopic slide bar 607 can be achieved by rotating the fastening bolt; in addition, when coating isosceles right trapezoidal plates or plates with gradually changing dimensions, the two sets of fixed limit wheels 609 and movable limit wheels 610 of the two spray width adjustment units 6 can be respectively clamped on both sides of the plate to achieve center spraying, and the size of the coating spray nozzle can be automatically changed as the size of the plate changes, thereby changing the coating range. The larger the plate size, the larger the coating range.

[0059] The spray width adjustment plate 603 is located behind the side control plate 502; multiple drop holes are arranged sequentially from front to back on the spray width adjustment plate 603 located below the spray gun 1 so that the blocked liquid falls into the return groove of the return plate 8 through the multiple drop holes.

[0060] Principle: In the metal product surface coating device of the present invention, the spray gun 1 is connected to the receiving base mechanism 3. It can be connected to a robot or a displacement trolley through the receiving base mechanism 3, thereby controlling the movement of the spray gun 1 on the receiving base mechanism 3. The present invention has a coating spray nozzle composed of two spray width adjustment units 6 and two side plate units 5, thereby limiting the spraying range. The size of the coating spray nozzle can be adjusted by adjusting the relative position of the two spray width adjustment units 6 within the two side plate units 5, thereby adjusting the coating spraying range, which facilitates more precise coating treatment according to the size or position of the surface to be coated. The two spray width adjustment units 6 are connected by a spring limiting unit 7 connected to the outside of a side plate unit 5. The distance between the two spray width adjustment units 6 can be adjusted by the spring limiting unit 7, thereby limiting the minimum distance between the two spray width adjustment units 6.

[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims.

[0062] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A surface coating device for metal products, characterized in that, The system includes a spray gun (1), a coating control mechanism (2), and a mounting base mechanism (3); the rear end of the spray gun (1) is connected to the mounting base mechanism (3); the coating control mechanism (2) includes a fixed base (4) fixed to the body of the spray gun (1), and a side plate unit (5) is fixed to the left and right ends of the fixed base (4), and two spray width adjustment units (6) are slidably engaged on the inner side of the two side plate units (5), and the two spray width adjustment units (6) are arranged opposite to each other at the upper and lower ends of the spray gun (1); the two spray width adjustment units (6) are connected to each other by a spring limit unit (7) connected to the outside of a side plate unit (5); the front ends of the two spray width adjustment units (6) and the two side plate units (5) form a coating spray nozzle; The side plate unit (5) includes a side plate body (501), a side control plate (502), a linkage block (503), and a side control rod (504); the rear end of the side plate body (501) is fixed to the side end of the fixed base (4); the front end of the side plate body (501) is provided with left and right slides that penetrate the side plate body (501), the left and right slides are sealed and slidably fitted with the side control plate (502), the outer end of the side control plate (502) is fixed with the linkage block (503), the linkage block (503) is threadedly fitted in the middle of the side control rod (504), and the inner end of the side control rod (504) is rotatably fitted on the outer side surface of the side plate body (501); It also includes a return plate (8), which is fixed to the lower end of the side plate body (501) and the fixing seat (4) of the two side plate units (5). The center of the return plate (8) is provided with a return trough, which is used to collect the liquid material that falls through the two spray width adjustment units (6), the two side plate bodies (501) and the two side control plates (502). The bottom of the return plate (8) is provided with a return pipe that is connected to and communicates with the return trough. An electric control valve is provided on the return pipe. The elastic limiting unit (7) includes a horizontal guide rod (701), a horizontal slide (702), a compression spring (703), a rod seat (704), and a movable connecting rod (705); the rear end of the horizontal guide rod (701) is fixed on the rod seat (704), the rod seat (704) is fixed on the rear end of the outer side of a side plate body (501), the horizontal guide rod (701) slides on the horizontal slide (702), the upper and lower ends of the horizontal slide (702) are respectively rotatably connected to a movable connecting rod (705), and the other ends of the two movable connecting rods (705) are rotatably connected to two spray amplitude adjustment units (6); the horizontal guide rod (701) is fitted with a compression spring (703), and the two ends of the compression spring (703) are respectively fixedly connected to the rod seat (704) and the horizontal slide (702); The horizontal guide rod (701) is an external thread rod structure, and the thread on the horizontal guide rod (701) is engaged with a limiting nut (706). The limiting nut (706) is located at the end of the horizontal slide (702) away from the compression spring (703). The spray width adjustment unit (6) includes a lifting slide (601), a rotating shaft (602), a spray width adjustment plate (603), a worm gear (604), and an adjusting worm (605); the lifting slide (601) is slidably fitted in the longitudinal slide rails at the rear ends of the two side plate bodies (501); the lower end of the front side of the lifting slide (601) is rotatably connected to the rotating shaft (602), the rotating shaft (602) is fixedly connected to the rear end of the spray width adjustment plate (603), the spray width adjustment plate (603) is slidably fitted in a sealed manner on the inner side surface of the two side plate bodies (501), the worm gear (604) is fixed on the rotating shaft (602), the worm gear (604) meshes with the adjusting worm (605) rotating on the lifting slide (601), and a screwing block is fixed at one end of the adjusting worm (605).

2. The metal product surface coating device according to claim 1, characterized in that, The receiving base mechanism (3) includes a receiving frame (301), a rotary drive motor (302), and a drive gear (303); the rear end of the spray gun (1) is rotatably connected to the receiving frame (301); the drive gear (303) is fixed on the output shaft of the rotary drive motor (302), and the drive gear (303) is meshed and transmitted to the rotary gear (101) fixed at the rear end of the spray gun (1); the movable material tube (102) is rotatably and sealed inside the feed port at the rear end of the spray gun (1).

3. The metal product surface coating device according to claim 1, characterized in that, The two fan-shaped holes (103) of the front wind cap of the spray gun (1) are located on both sides of the central main spray hole (104) of the spray gun (1), and each of the fan-shaped holes (103) is located between the main spray hole (104) and a side plate unit (5).

4. The metal product surface coating device according to claim 1, characterized in that, The spray width adjustment unit (6) further includes a rotating sleeve (606), a telescopic slide rod (607), an adjusting screw (608), a fixed limiting wheel (609), and a movable limiting wheel (610); the rear end of the rotating sleeve (606) is rotatably connected to the lifting slide (601), the front end of the rotating sleeve (606) is slidably connected to the rear end of the telescopic slide rod (607), a fixed limiting slide is fixed on the telescopic slide rod (607), the middle part of the limiting slide slide slides in the limiting slide track of the rotating sleeve (606), and the outer end of the limiting slide is threaded into the adjusting screw (608). In the middle of 608, the adjusting screw (608) rotates on the rotating sleeve (606) via the vertical seat; the fixed limiting wheel (609) is rotatably connected to the smooth rod at the front end of the telescopic slide rod (607), the movable limiting wheel (610) is threadedly fitted on the external thread rod at the front end of the telescopic slide rod (607), the movable limiting wheel (610) is threadedly fitted with a fastening bolt, and the inner end of the fastening bolt presses against the external thread rod at the front end of the telescopic slide rod (607); the fixed limiting wheel (609) is located between the movable limiting wheel (610) and the rotating sleeve (606).

5. A metal product surface coating device according to claim 4, characterized in that, The spray width adjustment plate (603) is located behind the side control plate (502); multiple drop holes are arranged sequentially from front to back on the spray width adjustment plate (603) located below the spray gun (1) so that the blocked liquid falls into the return groove of the return plate (8) through the multiple drop holes.

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