A spraying glue applying device for plywood

Abstract

The application discloses a kind of spraying gluing equipment of plywood, belong to the field of injection device.It includes: first conveying part, gluing part and second conveying part arranged in sequence along the conveying direction of production line, the gluing part includes transition grid and spraying device on the upper side of transition grid, the first conveying part is used to convey the wood board to be glued to transition grid, the second conveying device is used to convey the wood board after gluing by spraying device to next station;The first conveying part and the second conveying part respectively include conveying belt for supporting wood board, the height of the conveying belt of the first conveying part is greater than the height of the conveying belt of the second conveying part, the transition grid is lower than the height of the conveying belt of the first conveying part, and the transition grid is higher than or flush with the conveying belt of the second conveying part.The application solves the problem of sticking board in the production process of existing gluing equipment.

Description

Technical Field

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

[0002] Plywood, a commonly used material in furniture making, is one of the three major types of engineered wood products. It is used in aircraft, ships, trains, automobiles, construction, and packaging. Plywood is made by gluing three or more layers of wood together with adhesives. During the plywood processing, multiple sheets of wood are bonded together using adhesives, which are typically applied by coating or spraying.

[0003] Pressure spraying is increasingly widely used because it ensures better adhesive uniformity. Typically, pressure spraying equipment uses a first conveyor to move the wood panels to be sprayed along the production line direction, placing them on a support device below the spraying unit for atomized spraying. A second conveyor then transports them to the next station. Because the support device below the spraying unit is a non-powered area and is connected to both the first and second conveyors, panel jamming can easily occur during production. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is the problem of plate jamming during the production process of existing glue application equipment.

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

[0006] A plywood spraying and gluing device includes: a first conveying section, a gluing section, and a second conveying section arranged sequentially along the conveying direction of the production line. The gluing section includes a transition grid and a spraying device located above the transition grid. The first conveying section is used to convey the plywood to be glued onto the transition grid. The spraying device is used to spray and apply glue to the plywood on the transition grid. The second conveying device is used to convey the glued plywood to the next station. The first conveying section and the second conveying section each include a conveyor belt for supporting the plywood. The height of the conveyor belt of the first conveying section is greater than the height of the conveyor belt of the second conveying section. The transition grid is lower than the height of the conveyor belt of the first conveying section and is higher than or flush with the conveyor belt of the second conveying section.

[0007] In some embodiments of the present invention, the transition grid plate includes two spaced-apart support bars and

[0008] Several grid strips are connected between two support strips. The grid strips are shaped like waves and make point contact with the wooden board to be glued.

[0009] In some embodiments of the present invention, the transition grid plate is fixed to the support frame of the first conveying unit by a first connecting plate connected to one of the support bars, and the transition grid plate is fixed to the support frame of the second conveying unit by a second connecting plate connected to the other of the support bars.

[0010] In some embodiments of the present invention, a recycling trough is provided on the lower side of the transition grid plate, and support plates are respectively provided on the lower sides of the two support bars, the support plates being inserted into the opposite walls of the recycling trough.

[0011] In some embodiments of the present invention, the conveyor belt is provided with a plurality of through holes, and the conveyor belt is connected to a negative pressure suction device through the through holes. The negative pressure suction device includes: a suction box located below the conveyor belt, and a plurality of suction holes are formed on the upper surface of the suction box. The suction holes are connected to the conveyor belt...

[0012] The position of the through hole on the belt corresponds to the suction power device, which is connected to the suction box 5 through a pipeline.

[0013] In some embodiments of the present invention, the first conveying unit and the second conveying unit respectively include:

[0014] A support frame, a conveyor roller rotatably mounted on the support frame, and a conveyor belt mounted on the conveyor roller, wherein the conveyor roller drives the conveyor belt to move under the action of a second drive device.

[0015] In some embodiments of the present invention, the first conveying unit further includes a pressure roller mechanism, the pressure roller mechanism including a pressure roller support seat mounted on the support frame, and a pressure roller support seat pivotally connected to the support frame via a support rod.

[0016] The pressure roller on the wheel support seat abuts against the conveyor belt.

[0017] In some embodiments of the present invention, the spraying device includes: a spraying hood with an opening at the lower side, a plurality of spray holes on the upper side of the spraying hood, and an electronic spray gun inserted into the spray holes; located at the spraying hood

[0018] The spray bar on the upper side of the body is provided with several interfaces that are connected to the electronic spray gun through pipelines; 5. A suction hood installed on the spraying hood is used to suction the atomized adhesive between the spraying hood and the wood board to be coated.

[0019] In some embodiments of the present invention, the spray coating cover includes a first plate near the first conveying section and a second plate near the second conveying section, the suction cover is detachably mounted on the first plate and the second plate, and the bottom end face of the suction cover extends to the bottom end of the spray coating cover.

[0020] In some embodiments of the present invention, a discharge port is provided at one end of the recycling tank, and a recycling material holding box located below the discharge port is also provided. A discharge port communicating with the recycling pipeline is provided on the lower side of the recycling material holding box. A drawer filter is provided on the recycling material holding box. The drawer filter is removably installed on the recycling material holding box. The adhesive flowing out of the discharge port is filtered by the drawer filter and then enters the recycling pipeline through the discharge port.

[0021] The technical solution of the present invention has the following technical effects compared with the prior art:

[0022] In the plywood gluing and spraying equipment provided by the present invention, a first conveying unit is used to convey the plywood to be glued to a transition grid plate, a spraying device is used to spray the plywood that has passed through the transition grid plate, and a second conveying device is used to convey the glued plywood to the next station. The transition grid plate is lower than the height of the conveyor belt of the first conveying unit to ensure that the plywood smoothly passes through the transition section where the first conveying unit and the transition grid plate meet. The transition grid plate is higher than or flush with the conveyor belt of the second conveying unit to ensure that the plywood smoothly passes through the transition section where the transition grid plate and the second conveying unit meet, thereby avoiding plywood jamming and ensuring the gluing effect. Attached Figure Description

[0023] 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:

[0024] Figure 1 This is a schematic diagram of a specific embodiment of the plywood spraying and gluing equipment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the first conveying section, the transition grid plate, and the second conveying section in the plywood spraying and gluing equipment of the present invention;

[0026] Figure 3 This is a schematic diagram of the transition grid plate in the plywood spraying and gluing equipment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the first conveying section in the plywood spraying and gluing equipment of the present invention;

[0028] Figure 5 This is a schematic diagram of the second suction device in the plywood spraying and gluing equipment of the present invention;

[0029] Figure 6 This is a schematic diagram of the pressure roller mechanism in the plywood spraying and gluing equipment of the present invention.

[0030] Figure 7This is a schematic diagram of the spraying device in the plywood spraying and gluing equipment of the present invention;

[0031] Figure 8 This is a schematic diagram of the adhesive application section and the recovery section in the plywood spraying and adhesive application equipment of the present invention;

[0032] Figure 9 This is a schematic diagram of the recovery section in the plywood spraying and gluing equipment of the present invention;

[0033] Figure 10 This is a cross-sectional view of the recycling section in the plywood spraying and gluing equipment of the present invention. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figure 1 The image shows a specific embodiment of the plywood spraying and gluing equipment (hereinafter referred to as the gluing equipment) of the present invention, which is used to provide MDI adhesive to a wood board to be glued (the glued wood board is used, for example, to make plywood).

[0039] Reference Figure 1 , Figure 2 As shown, the gluing equipment includes a first conveying section 10A, a gluing section 20, and a second conveying section 10B arranged sequentially along the conveying direction 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 section 10A conveys the wood boards to be glued to the transition grid plate 21. The spraying device 22 is used to spray glue onto the wood boards on the transition grid plate 21. The second conveying section 10B is used to convey the glued wood boards to the next station. The first conveying section 10A and the second conveying section 10B each include a conveyor belt 13 for supporting the wooden board. The height of the conveyor belt 13 of the first conveying section 10A is greater than the height of the conveyor belt 13 of the second conveying section 10B. The transition grid plate 21 is lower than the height of the conveyor belt 13 of the first conveying section 10A to ensure that the wooden board passes smoothly through the transition section where the first conveying section 10A and the transition grid plate 21 meet. The transition grid plate 21 is higher than or flush with the conveyor belt 13 of the second conveying section 10B to ensure that the wooden board passes smoothly through the transition section where the transition grid plate 21 and the second conveying section 10B meet, thereby avoiding the phenomenon of the wooden board getting stuck and ensuring the glue application effect of the wooden board.

[0040] Specifically, the transition grid plate 21 includes support bars 213 arranged relatively parallel to each other and a plurality of grid bars 214 connecting the two support bars 213. The shape of the grid bars 214 is not unique, for example, Figure 3 As shown, the grid strip 214 is a straight, flat grid strip. In another specific embodiment, the grid strip 214 is a wavy grid strip (not shown in the figure), which allows the back of the board to be glued to make point contact with it, so as to minimize the contact area with the board and reduce the risk of the back of the board coming into contact with the adhesive.

[0041] Specifically, the installation and fixing method of the transition grid plate 21 is not unique; in one specific embodiment, the transition grid plate 21 is fixed to the support frame 11 of the first conveying section 10A by a first connecting plate 211, and the transition grid plate 21 is fixed to the support frame 11 of the second conveying section 10B by a second connecting plate 212. More specifically, the first connecting plate 211 and the second connecting plate 212 are respectively welded to two support bars 213. The upper surface of the first connecting plate 211 is flush with the conveyor belt 13 of the first conveying section 10A, the lower end of the first connecting plate 211 is fixedly connected to the transition grid plate 21, and the upper surface of the second connecting plate 212 is flush with the upper surface of the transition grid plate 21 and the conveyor belt 13 of the second conveying section 10B.

[0042] like Figure 3As shown, in another specific embodiment, the transition grid plate 21 is mounted on the recycling tank 51 located below the transition grid plate 21 by two support plates 215. More specifically, the lower sides of the two support bars 213 are respectively provided with support plates 215 perpendicular to the support bars 213. The support plates 215 are inserted into the wall surface of the recycling tank 51 in the front-back direction, which on the one hand realizes reliable support for the transition grid plate 21, and on the other hand can also realize a sealed connection between the transition grid plate 21 and the recycling tank 51, preventing the atomized adhesive from overflowing along the gap between the two.

[0043] Reference Figure 4 As shown, in the adhesive application equipment of the present invention, the first conveying section 10A and the second conveying section 10B respectively include: a support frame 11, a conveying roller 12 rotatably mounted on the support frame 11, and a conveyor belt 13 mounted on the conveying roller 12. The conveying roller 12 drives the conveyor belt 13 to move under the action of the second driving device 16. The conveyor belt 13 is provided with a plurality of through holes 13a, and the conveyor belt 13 is connected to a negative pressure suction device (not shown in the figure) through the through holes 13a. In this way, the wooden board 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 and the conveyor belt 13, avoids the problem of the wooden board stalling when passing over the unpowered transition grid 21, and makes the coating of the wooden board more uniform.

[0044] Specifically, such as Figure 4 , Figure 5 As shown, the negative pressure suction device includes a suction box 14 located below the conveyor belt 13 and a suction power device (not shown) connected to the suction box 14 via a pipeline. The upper surface of the suction box 14 has several suction holes 14a, which correspond to the positions of the through holes 13a on the conveyor belt 13. The lower side of the suction box 14 has a suction interface 14b for communication with the suction power device.

[0045] To further increase the friction between the wooden plank and the conveyor belt 13, so that the wooden plank can smoothly pass through the area where the transition grid 21 is located, as follows: Figure 1 , Figure 6As shown, the first conveying section 10A further includes a pressure roller mechanism 15, which is disposed near the adhesive application section 20. The pressure roller mechanism 15 includes a pressure roller support seat 151 mounted on the support frame 11, and at least one pressure roller 153 pivotally connected to the pressure roller support seat 151 via a support rod 152. The pressure roller 153 abuts against the conveyor belt 13. An elastic element 154 is provided between the pressure roller 153 and the pressure roller support seat 151. The elastic force of the elastic element 154 acts on the pressure roller 153, keeping it pressed against the conveyor belt 13. To prevent the pressure roller 153 from deforming the wooden board, the pressure roller 153 is a rubber roller. When the wooden board moves to the area where the pressure roller 153 is located under the action of the conveyor belt 13 of the first conveying section 10A, the wooden board passes through the area between the pressure roller 153 and the conveyor belt 13. The pressure roller 153 keeps the wooden board against the conveyor belt 13 under the action of the elastic member 154, so as to prevent the wooden board from losing speed when passing through the transition grid 21.

[0046] Reference Figure 7 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 and a spray bar 222 located on the upper side of the spraying cover 221. The upper side of the spraying cover 221 is provided with a plurality of spray holes 221a, and an electronic spray gun 224 is inserted into the spray holes 221a. The spray bar 222 is provided with a plurality of interfaces connected to the spray gun 224. More specifically, the plurality of electronic spray guns 224 are arranged in a row along the width direction of the spraying cover 221. The spraying cover 221 and the transition grid plate 21 are spaced apart. When the wood board to be sprayed moves onto the transition grid plate 21 under the action of the first conveying part 10A, the electronic spray guns 224 are controlled to perform spraying treatment, so that the MDI adhesive is sprayed onto the surface of the wood board along the width direction, and is evenly sprayed onto the entire surface of the wood board as the wood board moves at a uniform speed.

[0047] 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 in the area between the spraying hood 221 and the wood board to be glued. More specifically, the spraying hood 221 includes a first plate 221b near the first conveying section 10A and a second plate 221c near the second conveying section 10B. A plurality of suction hoods 223 are detachably connected to the first plate 221b and the second plate 221c. 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 wood board.

[0048] 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.

[0049] like Figure 7 As shown, the bottom of the suction hood 223 is provided with an inclined guide plate 223a, which is used to guide the large droplets of atomized adhesive in the suction hood 223 to the transition plate 21.

[0050] The above-mentioned adhesive application equipment also includes a recovery section 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.

[0051] like Figure 8-10 As shown, the recycling unit 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 aforementioned recycling unit 50 enables the recycling of adhesives, reducing adhesive contamination of production equipment. The drawer-type filter structure makes cleaning the filter convenient and quick.

[0052] 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.

[0053] 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.

[0054] 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 plywood spraying and gluing device, characterized in that, include: A first conveying section, a gluing section, and a second conveying section are arranged sequentially along the conveying direction of the production line. The gluing section includes a transition grid plate and a spraying device located on the upper side of the transition grid plate. The first conveying section is used to convey the wood boards to be glued to the transition grid plate. The spraying device is used to spray glue onto the wood boards on the transition grid plate. The second conveying section is used to convey the glued wood boards to the next work station. The first conveying section and the second conveying section each include a conveyor belt for supporting the wooden board. The height of the conveyor belt of the first conveying section is greater than the height of the conveyor belt of the second conveying section. The transition grid plate is lower than the height of the conveyor belt of the first conveying section and is higher than or flush with the conveyor belt of the second conveying section. The transition grid plate includes two support bars spaced apart and a plurality of grid bars connected between the two support bars. The grid bars are formed in a wavy shape and make point contact with the wooden board to be glued. The lower side of the transition grid plate is provided with a recycling trough, and the lower sides of the two support bars are respectively provided with support plates, which are inserted into the opposite walls of the recycling trough. The spraying device includes: A spray hood with an opening at the bottom, and several spray holes on the upper side of the spray hood, with an electronic spray gun inserted into each spray hole; A spray bar located on the upper side of the spray hood, the spray bar having several interfaces connected to the electronic spray gun via pipes; The suction hood installed on the spraying hood is used to suction the atomized adhesive between the spraying hood and the wood board to be glued. The conveyor belt is provided with several through holes, and the conveyor belt is connected to a negative pressure suction device through the through holes. The negative pressure suction device includes: A suction box is located below the conveyor belt, and a plurality of suction holes are opened on the upper surface of the suction box, the suction holes corresponding to the positions of the through holes on the conveyor belt; A suction power device is connected to the suction box via a pipeline.

2. The plywood spraying and gluing equipment according to claim 1, characterized in that, The transition grid plate is fixed to the support frame of the first conveying unit by a first connecting plate connected to one of the support bars, and the transition grid plate is fixed to the support frame of the second conveying unit by a second connecting plate connected to the other of the support bars.

3. The plywood spraying and gluing equipment according to claim 1, characterized in that, The first conveying section and the second conveying section each include: a support frame, a conveying roller rotatably mounted on the support frame, and a conveyor belt mounted on the conveying roller. The conveying roller drives the conveyor belt to move under the action of a second driving device.

4. The plywood spraying and gluing equipment according to claim 3, characterized in that, The first conveying section further includes a pressure roller mechanism, which includes a pressure roller support seat mounted on the support frame and a pressure roller pivotally connected to the pressure roller support seat via a support rod, the pressure roller abutting against the conveyor belt.

5. The plywood spraying and gluing equipment according to claim 1, characterized in that, The spray coating cover includes a first plate near the first conveying section and a second plate near the second conveying section. The suction cover is detachably mounted on the first plate and the second plate, and the bottom end face of the suction cover extends to the bottom end of the spray coating cover.

6. The plywood spraying and gluing equipment according to claim 1, characterized in that, The recycling tank is provided with a discharge port on one side end, and also includes a recycling material holding box located below the discharge port. The recycling material holding box is provided with a discharge port connected to the recycling pipeline on its lower side. The recycling material holding box is provided with a drawer filter. The drawer filter is removably installed on the recycling material holding box. The adhesive flowing out of the discharge port is filtered by the drawer filter and then enters the recycling pipeline through the discharge port.

Images