A spraying and gluing device for a board

Abstract

The application discloses a kind of spraying glue equipment of plate, belong to the field of spraying device.It includes spraying device, it includes: the spraying cover of lower side opening, the spraying cover upper side is equipped with several spray holes;Spray gun, the spray gun is installed on the spray hole of the spraying cover by magnetic attraction component, the magnetic attraction component includes first magnetic attraction piece and second magnetic attraction piece, the first magnetic attraction piece and second magnetic attraction piece are equipped with the magnetic attraction structure that can generate magnetic attraction, the first magnetic attraction piece is fixedly connected on the top wall of spraying cover, the second magnetic attraction piece is fixedly connected with the spray gun, and under the magnetic attraction of the first magnetic attraction piece, it is fixed on the top wall of the spraying cover.The application solves the problem that electronic spray gun is difficult to clean in the existing spraying glue equipment of plate.

Description

Technical Field

[0001] This invention relates to the field of plywood processing technology, and in particular to a spraying and gluing device for plywood. Background Technology

[0002] Plywood is a type of wood panel made by gluing three or more layers together with adhesives. During plywood processing, multiple individual sheets are bonded together using adhesives, typically applied by coating or spraying. Pressure spraying ensures better uniformity of adhesive application and has become increasingly widely used. MDI adhesives, also known as isocyanate adhesives, are formaldehyde-free and have a high molecular weight, making them less volatile and thus relatively environmentally friendly and safe. They have been widely used in the manufacture of high-performance engineered wood products in recent years.

[0003] Typically, pressure spraying adhesive application equipment uses a first conveyor to move the wood boards to be sprayed along the production line's running direction, moving them to the underside of the spraying device for atomized spraying. A second conveyor then transports the sprayed boards to the next station. MDI adhesive has a high viscosity, which can easily clog filters or nozzles in the supply line. Therefore, the adhesive supply line needs to be cleaned after the adhesive application production line stops. However, the electronic spray guns in existing adhesive application equipment are generally fixed to the support frame with fasteners, making disassembly difficult and cleaning inconvenient. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is the difficulty in cleaning the electronic spray gun in the existing spray coating equipment for sheet metal.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0006] A spray coating and adhesive application device for sheet metal includes a spraying apparatus comprising: a spraying hood with an opening at the lower side, wherein the spraying hood has a plurality of spray holes on its upper side; and a spray gun, wherein the spray gun is mounted on the spray holes of the spraying hood via a magnetic suction assembly, the magnetic suction assembly comprising a first magnetic suction element and a second magnetic suction element, the first magnetic suction element and the second magnetic suction element having magnetic suction structures capable of generating magnetic attraction, the first magnetic suction element being fixedly connected to the top wall of the spraying hood, and the second magnetic suction element being fixedly connected to the spray gun and fixed to the top wall of the spraying hood under the magnetic attraction of the first magnetic suction element.

[0007] In some embodiments of the present invention, the first magnetic suction member includes a non-magnetic first main body and at least one permanent magnet or magnetic body embedded in the first main body. The first magnetic suction member is fixed to the upper or lower side of the top wall of the spray coating cover by fasteners.

[0008] In some embodiments of the present invention, the second magnetic suction member includes a non-magnetic second main body and at least one permanent magnet or magnetic body embedded in the second main body. The second main body is provided with a second insertion hole, and the spray gun is inserted into the second insertion hole and fixedly connected to the second magnetic suction member by fasteners.

[0009] In some embodiments of the present invention, the spraying device further includes a spray bar located on the upper side of the spraying hood, and the spray bar is provided with a plurality of interfaces that are connected to the spray gun through pipelines.

[0010] In some embodiments of the present invention, the spraying device further includes a suction hood installed on the spraying hood for suctioning the atomized adhesive in the area between the spraying hood and the wood board to be coated.

[0011] In some embodiments of the present invention, the spraying hood includes a first hood plate near the first conveying area and a second hood plate near the second conveying area, the suction hood is mounted on the second hood plate, and the bottom end face of the suction hood extends to the bottom end of the spraying hood.

[0012] In some embodiments of the present invention, the spray gun is an electronic spray gun, and the spraying device further includes a wiring conduit located on the upper side of the spraying hood. A junction box is provided at one end of the wiring conduit, and the signal line of the electronic spray gun is connected to the junction box along the wiring conduit.

[0013] In some embodiments of the present invention, the gluing equipment includes a first conveying device, a transition grid plate, and a second conveying device arranged sequentially along the conveying direction of the production line, and the spraying device is located above the transition grid plate; the first conveying device is used to convey the wood board to be glued to the transition grid plate, the spraying device is used to spray glue onto the wood board that has moved to the gluing area, and the second conveying device is used to convey the glued wood board to the next station.

[0014] In some embodiments of the present invention, the spraying device further includes an anti-overflow plate, one end of which is connected to the lower side of the suction hood, and the other end extends toward the direction of the second conveying device.

[0015] In some embodiments of the present invention, the spraying device further includes a guide plate, one end of which is connected to the first cover plate of the spraying hood, and the other end extends toward the first conveying area.

[0016] The technical solution of the present invention has the following technical effects compared with the prior art:

[0017] In the spray coating and adhesive application equipment for sheet materials provided by the present invention, the spray gun in the spraying device is installed on the spray nozzle of the spraying hood via a magnetic suction assembly. The magnetic suction assembly includes a first magnetic suction component and a second magnetic suction component. The first magnetic suction component is fixedly connected to the top wall of the spraying hood, and the second magnetic suction component is fixedly connected to the spray gun and is fixed to the top wall of the spraying hood under the magnetic attraction of the first magnetic suction component. This allows the operator to easily remove the spray gun for cleaning after spraying. Attached Figure Description

[0018] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0019] Figure 1 This is a schematic diagram of a specific embodiment of the spray coating and adhesive application equipment for the sheet metal of the present invention;

[0020] Figure 2 This is a schematic diagram illustrating a specific embodiment of the spraying device in the spraying and gluing equipment for the sheet metal of the present invention;

[0021] Figure 3 This is a diagram showing the interaction between the spray gun and the second magnetic component in the spray coating and adhesive application equipment for the sheet material of the present invention.

[0022] Figure 4 This is another diagram showing the interaction between the spray gun and the second magnetic component in the spray coating and adhesive application equipment for the sheet metal of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the first magnetic suction component in the spray coating and adhesive application equipment for the sheet metal of the present invention;

[0024] Figure 6 This is a front view of a specific embodiment of the spray coating and adhesive application equipment for the sheet metal of the present invention;

[0025] Figure 7 This is a schematic diagram of the spraying device and air blowing device in the spraying and gluing equipment for the sheet material of the present invention;

[0026] Figure 8 This is a schematic diagram of the spraying device and recycling device in the spraying and gluing equipment for the sheet metal of the present invention;

[0027] Figure 9 This is a schematic diagram of the recycling device in the spray coating and adhesive application equipment for the sheet metal of the present invention;

[0028] Figure 10 This is a cross-sectional view of the recycling device in the spray coating and adhesive application equipment for the sheet metal of the present invention. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1 The image shows a specific embodiment of the adhesive spraying equipment for the board material of the present invention (hereinafter referred to as the adhesive spraying equipment). The adhesive spraying equipment is used to provide MDI adhesive to a board material A (which is used to make plywood, etc. after being glued). Of course, other atomizable adhesives can also be sprayed.

[0034] Reference Figure 1As shown, the gluing equipment includes: a first conveying device 10A, a gluing section 20, and a second conveying device 10B arranged sequentially along the conveying direction c of the production line. The gluing section 20 includes a transition grid plate 21 and a spraying device 22 located on the upper side of the transition grid plate 21. The first conveying device 10A conveys the wood board A to be glued onto the transition grid plate 21. The spraying device 22 is used to spray glue onto the wood board A on the transition grid plate 21. The second conveying device 10B is used to convey the glued wood board A to the next station. The first conveying device 10A and the second conveying device 10B each include: a conveyor belt 13 for supporting the wood board A. The conveyor belt 13 is provided with several through holes, and the conveyor belt 13 is connected to a negative pressure suction device (not shown in the figure) through the through holes. In this way, the wooden board A passing over the conveyor belt 13 is tightly pressed against the conveyor belt 13 under the action of the negative pressure suction device, which increases the friction between the wooden board A and the conveyor belt 13, avoids the problem of the wooden board A losing speed when passing over the unpowered transition grid 21, and makes the coating of the wooden board A more uniform.

[0035] Reference Figure 2 The image shows a spraying device 22 of a specific embodiment of the adhesive application equipment of the present invention. The spraying device 22 includes a spraying cover 221 with an opening on the lower side. The spraying cover 221 spans across the transition grid plate 21, that is, the length direction of the spraying cover 221 is perpendicular to the conveying direction c of the wooden board A. The upper side of the spraying cover 221 is provided with a plurality of spray holes 221a spaced apart along its length direction. A spray gun 224 is inserted into the spray holes 221a. The nozzle of the spray gun 224 is facing the transition grid plate 21. When the wooden board A moves onto the transition grid plate 21 under the action of the first conveying device 10A, the spray gun 224 is controlled to perform spraying treatment, so that the MDI adhesive is sprayed onto the surface of the wooden board A along the width direction, and is evenly sprayed onto the entire surface of the wooden board A as the wooden board A moves at a uniform speed.

[0036] To facilitate cleaning of the spray gun 224 after spraying, the spray gun 224 is magnetically attached to the spray nozzle 221a of the spray cover 221. Specifically, as shown... Figures 3-5 As shown, the magnetic attraction assembly includes a first magnetic attractor 227 and a second magnetic attractor 228. The first magnetic attractor 227 and the second magnetic attractor 228 are provided with magnetic structures capable of generating magnetic attraction, such as... Figures 6-7As shown, the first magnetic suction member 227 is fixedly connected to the top wall of the spray cover 221, and the second magnetic suction member 228 is fixedly connected to the spray gun 224 and is fixed to the spray cover 221 under the magnetic attraction of the first magnetic suction member 227. The magnetic structure allows the spray gun 224 to be reliably fixed to the spray cover 221. When cleaning the spray gun 224 is required, the spray gun 224 can be separated from the spray cover 221 by the magnetic separation of the second magnetic suction member 228 and the first magnetic suction member 227, thus quickly cleaning the residual adhesive inside the spray gun 224.

[0037] The magnetic attraction structure of the magnetic attraction component is not unique. In one optional embodiment, the magnetic attraction structure covers the entire surface of the first magnetic attraction component 227 and the second magnetic attraction component 228. This method has a higher magnetic attraction force, but it cannot keep the relative positional relationship between the spray gun 224 and the spray cover 221 consistent.

[0038] In another specific implementation, such as Figure 5 As shown, the first magnetic suction member 227 includes a non-magnetic first main body 2271 and at least one permanent magnet or magnetic body embedded in the first main body 2271; more specifically, the first main body 2271 is generally disk-shaped, and the central region of the first main body 2271 is provided with a through hole coaxially arranged with the spray hole 221a, and four embedded holes are evenly distributed around its axis on one side. The permanent magnet 2272 is fixed in the embedded holes. The first main body 2271 is also provided with a connecting hole 2271a, and the first magnetic suction member 227 is fixed to the upper surface of the top wall of the spray cover 221 by fastening screws passing through the connecting hole 2271a. Figure 3 , Figure 4As shown, the second magnetic suction component 228 includes a non-magnetic second main body 2281. More specifically, the second main body 2281 is generally disc-shaped. Four recessed holes are evenly distributed around the axis of one side of the second main body 2281, and a magnetic body 2282 is fixed within these recessed holes. The side of the second main body 2281 with the magnetic body 2282 engages with the side of the first main body 2271 of the first magnetic suction component 227 with the permanent magnet 2272 to achieve a magnetic connection. A second insertion hole 2281a is provided in the central region of the second main body 2281. The spray gun 224 is inserted into the second insertion hole 2281a and fixedly connected to the second magnetic suction component 228 by fasteners. In this magnetic suction structure, because the positions of the permanent magnet 2272 and the magnetic body 2282 are fixed, it facilitates the positioning of the spray gun 224, ensuring that the positional relationship between the spray gun 224 and the spraying cover 221 remains fixed each time the spray gun 224 is installed or removed, thus avoiding the problem of poor spraying effect on the wooden board A due to changes in the position of the spray gun 224. In other alternative embodiments, the spray cover 221 is made of a non-magnetic material, the first magnetic absorbing member 227 is connected to the lower side of the spray cover 221 by fasteners, the spray cover 221 is provided with a through hole at the location of the permanent magnet 2272 of the first magnetic absorbing member 227, and the second magnetic absorbing member 228 is fixed to the first magnetic absorbing member 227 by the magnetic element 2282 thereon.

[0039] Specifically, such as Figure 1 , Figure 6 , Figure 7 As shown, the spraying device 22 also includes a spray bar 222 located on the upper side of the spraying cover 221. The spray bar 222 is connected to the adhesive supply pipeline. The spray bar 222 is provided with several interfaces that are connected to the spray guns 224. The adhesive flows into each spray gun 224 through the interfaces of the spray bar 222 via each pipeline.

[0040] like Figure 7 As shown, a suction hood 223 is also installed on the spraying hood 221. The suction hood 223 is ultimately connected to the first suction device (not shown in the figure) and is used to suction the atomized adhesive between the spraying hood 221 and the wooden board A to be glued. More specifically, the spraying hood 221 includes a first cover plate 221b near the first conveying device 10A and a second cover plate 221c near the second conveying device 10B. A plurality of suction hoods 223 are detachably connected to the second cover plate 221c, and the bottom end faces of the plurality of suction hoods 223 cover the width of the transition grid plate 21 along the direction perpendicular to the running direction of the wooden board A. Alternatively, the suction hoods 223 can also be connected to the second cover plate 221c by welding or integral stamping.

[0041] The bottom end of the suction hood 223 extends to the bottom end of the spraying hood 221. The suction hood 223 is formed into an approximately trapezoidal hood structure that is wider at the bottom and narrower at the top. This hood structure facilitates smoother airflow and reduces the energy consumption of the first suction device. Figure 7 As shown, the bottom of the suction hood 223 is provided with an inclined guide grid plate, which is used to guide the large droplets of atomized adhesive in the suction hood 223 to the transition grid plate 21.

[0042] To reduce or prevent the atomized adhesive inside the spray cover 221 from overflowing along the bottom opening of the spray cover 221 under the action of the moving wooden board A, such as Figure 6 , Figure 7 As shown, the spraying device 22 also includes an anti-overflow plate 225. One end of the anti-overflow plate 225 is connected to the lower side of the suction hood 223, and the other end extends in a direction close to the second conveying device 10B. The anti-overflow plate 225 is approximately parallel to the wooden board A that moves in this area. It can keep the atomized adhesive overflowing along the opening side of the spraying hood 221 in the area between the anti-overflow plate 225 and the wooden board A. As the anti-overflow plate 225 extends, the amount of atomized adhesive gradually decreases to reduce its overflow.

[0043] More specifically, the spill guard 225 is inclined upward from the side near the spraying device 22 (i.e., the suction hood 223 side) to the side near the second conveying device 10B (i.e., the free end of the spill guard 225), which allows the liquefied adhesive in the lower area of ​​the spill guard 225 to flow out along the inclined plate surface to the spraying device 22 side and into the recycling device 50 of the adhesive application equipment.

[0044] To further prevent the atomized adhesive from being carried outside the sprayed area, such as Figure 1 As shown, the adhesive application equipment also includes an air blowing device 30. The air blowing device 30 is located in the area adjacent to the adhesive application area (i.e., the area where the spraying device 20 sprays onto the wood board A) and the second conveying area (i.e., the area where the second conveying device 10B is located). The air blowing device 30 is located on the upper side of the second conveying device 10B and the transition grid plate 21, and its air outlet faces downward. When the wood board A moves onto the second conveying device 10B, the air blowing device 30 blows high-pressure gas onto the wood board A to prevent the atomized adhesive from overflowing along the surface of the wood board A to the side of the second conveying device 10B.

[0045] Specifically, refer to Figures 6-7 As shown, the air blowing device 30 includes an air blowing pipe 31 that spans the upper side of the wooden board A, that is, the air blowing pipe 31 extends horizontally, and its extension direction (i.e., Figure 1 The first direction (indicated by arrow a) is perpendicular to the conveying direction c of the production line. Several air outlets are spaced apart on the lower side of the air blowing pipe 31, and nozzles are provided on the air outlets.

[0046] More specifically, the air outlet is perpendicular to the surface of the wooden board A, and the spray surface of the nozzle is fan-shaped. Several nozzles form a spray surface that can cover the first direction, which can prevent the atomized adhesive from being blown into other areas besides the adhesive application area.

[0047] Specifically, the air outlet of the air blowing device 30 is horizontally spaced from the free end of the anti-overflow plate 225, and the air outlet of the air blowing device 30 is located on the upper side of the anti-overflow plate 225, which can prevent the atomized gas at the free end of the anti-overflow plate 225 from overflowing upward.

[0048] like Figure 6 , Figure 7 As shown, the spraying device 22 also includes a guide plate 226 for guiding the wooden board A to the lower side of the spraying cover 221. One end of the guide plate 226 is connected to the first cover plate 221b of the spraying cover 221, and the other end extends toward the first conveying area (the area where the first conveying device 10A is located). This can prevent the front end of the wooden board A from warping too much and causing interference with the first cover plate 221b of the spraying cover 221.

[0049] More specifically, the guide plate 226 is inclined upward from the side near the spraying device 22 to the free end, that is, the distance between the free end of the guide plate 226 and the conveyor belt 13 of the first conveying device 10A is large, which makes it easier for the wooden board A to enter the lower side of the guide plate 226; and the inclined guide plate 226 makes it easier to guide the wooden board A to the surface of the transition grid plate 21.

[0050] Specifically, refer to Figure 2 , Figure 6 , Figure 7 As shown, the spray gun 224 is an electronic spray gun 224, that is, the spray gun 224 is controlled by a solenoid valve. The spraying device 22 also includes a wiring conduit 229 located on the upper side of the spraying hood 221. A junction box 220 is provided at one end of the wiring conduit 229. The signal line of the electronic spray gun 224 is connected to the junction box 220 along the wiring conduit 229. The junction box 220 is connected to the main controller through a communication interface, which can conveniently transmit the signals of several electronic spray guns 224 to the main controller.

[0051] The adhesive application equipment also includes a recovery device 50 located below the transition grid plate 21, which is used to recover excess liquid adhesive during the spraying of the spraying device 22 and guide it into the recovery pipeline. The adhesive in the recovery pipeline is then transported back to the feeding device side through a filter device and a recovery pump.

[0052] like Figure 8-10As shown, the recycling device 50 includes a recycling tank 51, with a discharge port 51a at one end of the recycling tank 51, and a recycling material holding box 52 located below the discharge port 51a. The recycling material holding box 52 has an outlet 52a connected to the recycling pipeline on its lower side. A drawer filter 53 is installed on the recycling material holding box 52, and the drawer filter 53 is removably installed on the recycling material holding box 52. After spraying by the spraying device 22, large droplets of atomized adhesive generated inside the spraying hood 221 and between the spraying hood 221 and the transition grid plate 21 condense and fall into the recycling tank 51 through the transition grid plate 21. These droplets then flow through the discharge port 51a into the recycling material holding box 52, are filtered by the drawer filter 53, and flow to the lower part of the recycling material holding box 52 before entering the recycling pipeline through the outlet 52a. After a period of production, the drawer filter 53 can be removed for cleaning. The above-mentioned recycling device 50 can realize the recycling of adhesives, reduce the pollution of production equipment by adhesives, and adopt a drawer-type filter structure to make the filter cleaning convenient and quick.

[0053] like Figure 9 , Figure 10 As shown, the recycling tank 51 is equipped with a spiral shaft 54, which rotates under the action of the first driving device 55 and conveys the adhesive to the discharge port 51a side.

[0054] Specifically, the recycling trough 51 is a V-shaped trough, and the bottom of the recycling trough 51 is inclined in the horizontal direction, and the discharge port 51a is located at the lowest end of the recycling trough 51.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A spray coating and adhesive application device for sheet metal, characterized in that, Includes a spraying device, which includes: A spray hood with an opening on the lower side, wherein the upper side of the spray hood is provided with several spray holes; A spray gun is mounted on the spray nozzle of the spray hood via a magnetic suction assembly. The magnetic suction assembly includes a first magnetic suction component and a second magnetic suction component. The first magnetic suction component and the second magnetic suction component are provided with magnetic suction structures that can generate magnetic attraction. The first magnetic suction component is fixedly connected to the top wall of the spray hood, and the second magnetic suction component is fixedly connected to the spray gun and is fixed to the top wall of the spray hood under the magnetic attraction of the first magnetic suction component. The adhesive application equipment also includes an air blowing device located in the area adjacent to the adhesive application zone and the second conveying zone. The air outlet of the air blowing device faces downward. The air blowing device includes an air blowing pipe extending horizontally, with the extension direction of the air blowing pipe perpendicular to the conveying direction of the production line. Several air outlets are spaced apart on the lower side of the air blowing pipe, and nozzles are provided on the air outlets. The several nozzles form a spraying surface that can cover the first direction. The spraying device also includes an anti-overflow plate. The air outlet of the air blowing device and the free end of the anti-overflow plate are spaced apart horizontally, and the air outlet of the air blowing device is located on the upper side of the anti-overflow plate.

2. The spray coating and adhesive application equipment for sheet metal according to claim 1, characterized in that, The first magnetic chuck includes a non-magnetic first main body and at least one permanent magnet or magnetic body embedded in the first main body. The first magnetic chuck is fixed to the upper or lower side of the top wall of the spray coating cover by fasteners.

3. A spray coating and adhesive application device for sheet metal according to claim 1 or 2, characterized in that, The second magnetic suction component includes a non-magnetic second main body and at least one permanent magnet or magnetic body embedded in the second main body. The second main body is provided with a second insertion hole, and the spray gun is inserted into the second insertion hole and fixedly connected to the second magnetic suction component by fasteners.

4. The spray coating and adhesive application equipment for sheet metal according to claim 1, characterized in that, The spraying device also includes a spray bar located on the upper side of the spraying hood, and the spray bar is provided with several interfaces that are connected to the spray gun through pipelines.

5. The spray coating and adhesive application equipment for sheet metal according to claim 1, characterized in that, The spraying device also includes a suction hood installed on the spraying hood for suctioning the atomized adhesive between the spraying hood and the wood board to be coated.

6. The spray coating and adhesive application equipment for sheet metal according to claim 5, characterized in that, The spray coating cover includes a first cover plate and a second cover plate, the suction cover is installed on the second cover plate, and the bottom end face of the suction cover extends to the bottom end of the spray coating cover.

7. The spray coating and adhesive application equipment for sheet metal according to claim 1, characterized in that, The spray gun is an electronic spray gun, and the spraying device also includes a wiring conduit located on the upper side of the spraying hood. A junction box is provided at one end of the wiring conduit, and the signal line of the electronic spray gun is connected to the junction box along the wiring conduit.

8. The spray coating and adhesive application equipment for sheet metal according to claim 5, characterized in that, The gluing equipment includes a first conveying device, a transition grid, and a second conveying device arranged sequentially along the conveying direction of the production line. The spraying device is located above the transition grid. The first conveying device is used to convey the wood board to be glued to the transition grid. The spraying device is used to spray glue onto the wood board that has moved to the gluing area. The second conveying device is used to convey the glued wood board to the next station.

9. The spray coating and adhesive application equipment for sheet metal according to claim 8, characterized in that, One end of the anti-overflow plate is connected to the lower side of the suction hood, and the other end extends toward the direction of the second conveying device.

10. The spray coating and adhesive application equipment for sheet metal according to claim 8, characterized in that, The spraying device also includes a guide plate, one end of which is connected to the first cover plate of the spraying hood, and the other end extends toward the first conveying device.

Images