Automatic plate blowing device

Abstract

The utility model discloses an automatic plate blowing device, which relates to the technical field of plate hot-pressing film pasting, and comprises a rack, two parallel conveyor belts are arranged at the top end of the rack at an interval, the top end of the rack is also provided with an opening, and the opening extends along the conveying direction of the conveyor belts and is positioned below the interval; the first sensor is arranged at the position, close to the feeding end of any conveying belt, of the rack; the first blowing mechanism is arranged above the top end of the rack and located in front of the first sensor in the conveying direction of the conveying belt; the second sensor is arranged at the position, close to the discharging end of any conveying belt, of the rack; the second blowing mechanism is arranged below the top end of the rack and located in front of the second sensor in the conveying direction of the conveying belt; and the control unit is in signal connection with the first sensor, the first purging mechanism, the second sensor and the second purging mechanism. The device can eliminate the manual intervention link in the plate blowing process, and automatic scrap removal of the front side and the back side of the plate is achieved.

Description

Technical Field

[0001] This utility model relates to the field of hot-pressing film application technology for sheet metal, and more specifically, to an automatic blowing device for sheet metal. Background Technology

[0002] After the board is hot-pressed and laminated, the excess surface film around the edges needs to be trimmed before further processing. However, some debris remains on the board surface after trimming. If the board is directly transported away for subsequent processing, this debris will affect the subsequent processing, resulting in a product defect rate as high as 6.8%. Therefore, the board surface needs to be cleaned. Cleaning requires cleaning both sides of the board, which makes cleaning difficult. Currently, manual intervention is required to flip the board to clean both sides. However, manual flipping (operation time t≥6s / piece) results in an equipment idle rate >20%, low cleaning efficiency, increased energy costs, wasted manpower, and the risk of secondary pollution.

[0003] Therefore, how to eliminate manual intervention during the blowing process of the board and achieve automatic chip removal on both sides of the board is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an automatic board blowing device that can eliminate manual intervention during the board blowing process and achieve automatic chip removal on both sides of the board.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An automatic board cleaning device includes a cleaning assembly, the cleaning assembly comprising:

[0007] A frame has two parallel and spaced conveyor belts at its top for conveying sheet metal. The top of the frame also has an opening that extends along the conveying direction of the conveyor belts and is located below the spacing.

[0008] The first sensor is located on the frame near the feed end of any of the conveyor belts and is used to detect whether the plate material is present.

[0009] The first purging mechanism is located above the top of the frame and in front of the first sensor along the conveying direction of the conveyor belt, and the purging port I of the first purging mechanism is arranged facing the upper end face of the two conveyor belts.

[0010] The second sensor is located on the frame near the discharge end of any of the conveyor belts and is used to detect whether the plate material is present.

[0011] The second purging mechanism is located below the top of the frame and in front of the second sensor along the conveying direction of the conveyor belt, and the purging port II of the second purging mechanism is arranged facing the lower end face of the two conveyor belts.

[0012] The control unit is signal-connected to the first sensor, the first purging mechanism, the second sensor, and the second purging mechanism.

[0013] Preferably, there are two first sensors, which are arranged along the conveying direction perpendicular to the conveyor belt and adjacent to the two conveyor belts respectively;

[0014] The second sensor is configured as two, and the two second sensors are arranged along the conveying direction perpendicular to the conveyor belt and adjacent to the two conveyor belts respectively.

[0015] Preferably, both the first sensor and the second sensor are trigger-type sensors.

[0016] Preferably, the first portion of the conveyor belt located between its feed end and the first purging mechanism forms an angle with the purging port I;

[0017] The second portion of the conveyor belt located between its discharge end and the first purging mechanism forms an angle with the purging port II.

[0018] Preferably, the first purging mechanism includes a bracket, a plurality of first nozzles, and a plurality of first air pumps that are all signal-connected to the control unit. The bracket is mounted above the frame and a space is left between its top plate and the conveyor belt. The plurality of first nozzles are spaced apart on the top plate along the conveying direction perpendicular to the conveyor belt to form the purging port I, and are connected to the plurality of first air pumps one by one.

[0019] Preferably, the first nozzle is tilted toward the first portion of the conveyor belt located between its feed end and the first purging mechanism.

[0020] Preferably, the first blowing mechanism further includes a brush roller and a driver connected to the control unit. The driver is connected to the brush roller. The brush roller is rotatably disposed in the space about its axis and has a material channel between it and the conveyor belt for the material to pass through. The brush roller is located on the side of the nozzle facing away from the first sensor, and the axis of the brush roller is perpendicular to the conveying direction of the conveyor belt.

[0021] Preferably, the second purging mechanism includes a fixed rod, a plurality of second nozzles, and a plurality of second air pumps that are all signal-connected to the control unit. The fixed rod is located below the top of the frame, and the plurality of second nozzles are spaced apart on the fixed rod along the conveying direction perpendicular to the conveyor belt to form the purging port II, and are connected to the plurality of second air pumps one by one.

[0022] Preferably, the second nozzle is tilted toward the second portion of the conveyor belt located between its discharge end and the first purging mechanism.

[0023] Preferably, it also includes a sealing cover, which is disposed around the periphery of the blowing assembly. The sealing cover is provided with a dust suction hole for connecting a negative pressure device to suck up debris or impurities.

[0024] The automatic board cleaning device provided by this utility model, when in use, when the cut board is conveyed to the sensing range of the first sensor by two conveyor belts, the first sensor sends a board loading signal to the control unit. The control unit controls the first cleaning mechanism to clean the front side of the board according to the preset control logic. During the cleaning process, the two conveyor belts continuously convey the board. When the board is conveyed to the sensing range of the second sensor, the second sensor sends a board unloading signal to the control unit. The control unit controls the second cleaning mechanism to clean the back side of the board according to the preset control logic, thereby completing the removal of chips from both sides of the board before the board is conveyed to the subsequent processing position.

[0025] Therefore, this application achieves automatic chip removal on both sides of the board by using two pairs of linked sensors and a blowing mechanism, eliminating manual intervention, greatly saving labor costs, significantly improving cleaning efficiency, and avoiding the risk of secondary pollution. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a top view of an automatic sheet metal blowing device provided by this utility model;

[0028] Figure 2 This is a front view of an automatic sheet metal blowing device provided by this utility model;

[0029] Figure 3 This is a side view of an automatic purging device for sheet metal provided by this utility model.

[0030] Figure label:

[0031] 1-Frame; 2-Conveyor belt; 3-Spacing; 4-Opening; 5-First sensor; 6-First purging mechanism; 7-Second sensor; 8-Second purging mechanism;

[0032] 61-Bracket; 62-First nozzle; 63-Support rod; 64-Brush roller;

[0033] 81-Fixing rod; 82-Second nozzle. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] The core of this utility model is to provide an automatic blowing and cleaning device for sheet materials. This device can eliminate the manual intervention in the blowing and cleaning process of sheet materials and realize automatic chip removal on both sides of the sheet material.

[0036] It should be noted that in this embodiment, the orientation or positional relationship indicated by "up", "down", "front", "back", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and is not intended to 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, it should not be construed as a limitation on this application.

[0037] Please refer to Figure 1 This application provides a specific embodiment of an automatic blowing device for sheet metal, including a blowing assembly, which includes a frame 1, a first sensor 5, a first blowing mechanism 6, a second sensor 7, and a second blowing mechanism 8.

[0038] The top of the frame 1 is provided with two parallel conveyor belts 2 with a spacing of 3, which are used to transport the sheet metal. The top of the frame 1 is also provided with an opening 4, which extends along the conveying direction of the conveyor belts 2 and is located below the spacing 3.

[0039] In this embodiment, the conveyor belt 2 extends laterally and is rotatably mounted around the top of the frame 1, meaning the conveying direction of the conveyor belt 2 is laterally, and the frame 1 serves to support the rotating transport of the conveyor belt 2. Furthermore, as... Figure 3As shown, there are two conveyor belts 2, which are parallel to each other and have a gap 3 along the longitudinal direction. This gap 3 can be determined according to the width of the board. The gap 3 is slightly smaller than the width of the board, so that the two conveyor belts 2 can support the two sides located in the width direction of the board respectively, so as to drive the board to move. At the same time, it also ensures that the back of the board is connected to the opening 4 on the top of the frame 1, so that the second blowing mechanism 8 can blow the back of the board through the opening 4.

[0040] It should be noted that on the processing production line, the feed end of conveyor belt 2 is located near the discharge end of the cutting device. The cut sheet material can fall directly from the discharge end of the cutting device to the feed end of conveyor belt 2. Alternatively, the cut sheet material can be placed at the feed end of conveyor belt 2 manually or via a transfer mechanism. Furthermore, the discharge end of conveyor belt 2 can be located near the feed end of the next process device. Conveyor belt 2 can directly transport the sheet material to the subsequent processing position. Again, the sheet material can be transported to the subsequent processing position manually or via a transfer mechanism.

[0041] The first sensor 5 is located on the frame 1 near the feed end of any one of the conveyor belts 2, and is used to detect whether there is a plate; the first blowing mechanism 6 is located above the top of the frame 1 and in front of the first sensor 5 along the conveying direction of the conveyor belt 2, and the blowing port I of the first blowing mechanism 6 is set facing the upper end face of the two conveyor belts 2.

[0042] If the first sensor 5 detects the board material, it means that the cut board material has been placed on the two conveyor belts 2 by manual means or transfer mechanism for conveying. The first sensor 5 will send a board material loading signal to the control unit. The control unit controls the first blowing mechanism 6 to blow the front of the board material according to the preset control logic.

[0043] The second sensor 7 is located on the frame 1 near the discharge end of any one of the conveyor belts 2, and is used to detect whether there is a plate; the second blowing mechanism 8 is located below the top of the frame 1 and in front of the second sensor 7 along the conveying direction of the conveyor belt 2, and the blowing port II of the second blowing mechanism 8 is set facing the lower end face of the two conveyor belts 2.

[0044] If the second sensor 7 detects the board, it means that the board has been cleaned on the front by the first blowing mechanism 6. The second sensor 7 will send a board ready-to-be-unload signal to the control unit. The control unit will control the second blowing mechanism 8 to blow the back of the board according to the preset control logic, so as to complete the removal of chips on both sides of the board before the board is conveyed to the subsequent processing position.

[0045] It should be noted that before the board is conveyed to the location of the second sensor 7, some debris on the back of the board will fall off under the action of gravity, while the remaining debris will fall off by the airflow blown by the second blowing mechanism 8, which can improve the cleaning effect on the back of the board.

[0046] The control unit is connected to the first sensor 5, the first purging mechanism 6, the second sensor 7, and the second purging mechanism 8.

[0047] The control unit can receive the signal output by the first sensor 5, and then control the first blowing mechanism 6 to blow the front of the board according to the preset control logic. Similarly, the control unit can also receive the signal output by the second sensor 7, and then control the second blowing mechanism 8 to blow the back of the board according to the preset control logic, thereby avoiding manual intervention and realizing automatic chip removal on both sides of the board.

[0048] Therefore, the automatic board cleaning device provided in the above embodiment can automatically remove lint from both sides of the board through two pairs of linked sensors and cleaning mechanisms, eliminating manual intervention, greatly saving labor costs, significantly improving cleaning efficiency, and avoiding the risk of secondary pollution.

[0049] To achieve automatic conveying of the sheet material, based on the above embodiments and considering the specific driving method of the conveyor belt 2, as a preferred embodiment, the conveyor belt 2 is connected to a driving mechanism. The driving mechanism is used to drive the conveyor belt 2 to move, and the driving mechanism is connected to a control unit. The control unit can control the start, stop, speed and stroke of the conveyor belt 2 by controlling the operation of the driving mechanism, thereby achieving automatic conveying of the sheet material, reducing manual intervention and greatly avoiding the risk of secondary pollution.

[0050] Regarding the specific configuration of the drive mechanism, as a preferred embodiment, the drive mechanism includes a driving wheel, a driven wheel, and a motor connected to the control unit via signals. The driving wheel and the driven wheel are rotatably located at opposite ends of the frame 1. The motor is mounted on the frame 1 and connected to the driving wheel. The conveyor belt 2 connects the driving wheel and the driven wheel. This configuration ensures uniform and stable conveying of the sheet metal, improving the efficiency and reliability of sheet metal conveying.

[0051] Based on the above embodiments, as a further preferred option, please refer to... Figure 1 Two first sensors 5 are arranged along the conveying direction of the vertical conveyor belt 2 and adjacent to the two conveyor belts 2 respectively; two second sensors 7 are arranged along the conveying direction of the vertical conveyor belt 2 and adjacent to the two conveyor belts 2 respectively.

[0052] The paired first sensor 5 and second sensor 7 can still perform normal detection when one sensor fails or misdetects, thereby ensuring that the first blowing mechanism 6 and the second blowing mechanism 8 can perform normal blowing operations, and thus ensuring the removal of chips from both sides of the board.

[0053] Regarding the types of the first sensor 5 and the second sensor 7, based on the above embodiments, as a further preferred embodiment, both the first sensor 5 and the second sensor 7 are trigger-type sensors.

[0054] The trigger-type sensor generates an electrical signal through mechanical contact. Thus, the material itself can trigger the first sensor 5 to activate the first blowing mechanism 6 and the second sensor 7 to activate the second blowing mechanism 8 based on its own gravity. This improves the response speed of the first and second blowing mechanisms 6 and 8, thereby increasing cleaning efficiency; it also reduces sensor power consumption, thus lowering overall energy consumption and saving costs.

[0055] To further optimize cleaning efficiency, based on the above embodiments, as a preferred option, please refer to... Figure 2 The first part of the conveyor belt 2 located between its feed end and the first purging mechanism 6 forms an angle with the purging port I of the first purging mechanism 6; the second part of the conveyor belt 2 located between its discharge end and the first purging mechanism 6 forms an angle with the purging port II of the second purging mechanism 8.

[0056] In other words, the blowing port I of the first blowing mechanism 6 forms a certain angle with the front side of the board, causing the first blowing mechanism 6 to tilt towards the front side of the board for blowing. Compared with vertical blowing, this can expand the blowing coverage area and significantly increase the area processed per unit time, thereby effectively improving cleaning efficiency. Similarly, the blowing port II of the second blowing mechanism 8 forms a certain angle with the back side of the board, which can also effectively improve cleaning efficiency.

[0057] Based on the above embodiments, and considering the specific configuration of the first purging mechanism 6, as a preferred option, please refer to... Figure 2 and Figure 3 The first purging mechanism 6 includes a bracket 61, a plurality of first nozzles 62 and a plurality of first air pumps that are all connected to the control unit. The bracket 61 is mounted above the frame 1 and there is a space between its top plate and the conveyor belt 2. The plurality of first nozzles 62 are spaced apart on the top plate along the conveying direction perpendicular to the conveyor belt 2 to form purging ports I, and are connected to the plurality of first air pumps one by one.

[0058] Specifically, the support 61 has an inverted U-shaped structure, straddling the frame 1, with a space between the top plate of the support 61 and the conveyor belt 2. This space not only allows the sheet material to pass through but also accommodates the brush roller 64 described below. Multiple nozzles are spaced apart on the top plate of the support 61 along the conveying direction perpendicular to the conveyor belt 2, forming the aforementioned blowing port I, used to blow airflow onto the front of the sheet material. Each nozzle is connected to a corresponding first air pump, and each first air pump is externally connected to an air supply device. The first air pump can pump air to its corresponding first nozzle 62 for spraying, thereby achieving the blowing of the front of the sheet material.

[0059] Furthermore, the first nozzle 62 is tilted towards the first portion of the conveyor belt 2 located between its feed end and the first blowing mechanism 6, so that the blowing port I of the first blowing mechanism 6 can form an angle with the front side of the plate, thereby achieving tilted blowing. Preferably, the angle is 45 degrees, ensuring that the debris detachment angle is greater than 90 degrees, thus effectively improving cleaning efficiency.

[0060] Based on the above embodiments, as a further preferred option, please refer to... Figure 2 and Figure 3 The first blowing mechanism 6 also includes a brush roller 64 and a driver connected to the control unit. The driver is connected to the brush roller 64. The brush roller 64 is rotatably disposed in the space around its axis and has a material channel between it and the conveyor belt 2 for the material to pass through. The brush roller 64 is located on the side of the nozzle facing away from the first sensor 5, and the axis of the brush roller 64 is perpendicular to the conveying direction of the conveyor belt 2.

[0061] Specifically, a first rotating shaft extends along the conveying direction of the vertical conveyor belt 2 between the two side plates of the support 61 and between the top plate and the conveyor belt 2. A brush roller 64 is sleeved on the first rotating shaft, and the axis of the first rotating shaft coincides with that of the brush roller 64. The brush roller 64 is connected to a driver, which drives the brush roller 64 to rotate around the first rotating shaft. A board channel is provided between the brush roller 64 and the conveyor belt 2 for the board to pass through. Thus, when the board passes through the board channel, the brush roller 64 can sweep away debris on the front of the board. Therefore, the brush roller 64 and multiple nozzles work together to reduce the debris remaining on the front of the board, thereby effectively improving the cleaning effect on the front of the board.

[0062] In addition, such as Figure 2 As shown, the brush roller 64 is located on the side of the nozzle facing away from the first sensor 5. That is, the brush roller 64 is located in front of the nozzle along the conveying direction of the conveyor belt 2, so that the nozzle first removes most of the debris on the front of the board through the high airflow, and then the brush roller 64 removes the remaining debris on the front of the board by contact (such as the corners of the board, where the coverage of the blow-out port I is not good), thereby thoroughly removing the debris on the front of the board.

[0063] Regarding the specific installation method of the multiple first nozzles 62, in one specific embodiment, a detachable support rod 63 is provided on the top plate. The support rod 63 extends along the conveying direction of the vertical conveyor belt 2, and the multiple first nozzles 62 are arranged at intervals on the support rod 63, thereby facilitating the replacement or maintenance of the first nozzles 62.

[0064] Preferably, along the conveying direction of the vertical conveyor belt 2, the distance 3 between the two outermost first nozzles 62 is not less than the width of the plate, so that the blowing port I can better cover the front of the plate, thereby ensuring the cleaning effect.

[0065] Based on the above embodiments, and considering the specific configuration of the second blowing mechanism 8, as a preferred embodiment, the second blowing mechanism 8 includes a fixed rod 81, multiple second nozzles 82, and multiple second air pumps, each signal-connected to the control unit. The fixed rod 81 is located below the top of the frame 1. The multiple second nozzles 82 are spaced apart on the fixed rod 81 along the conveying direction of the vertical conveyor belt 2 to form blowing ports II, and are connected to the multiple second air pumps one by one. Each second air pump is also externally connected to an air supply device, and the second air pump can pump gas to its corresponding second nozzle 82 for spraying, thereby realizing the blowing of the reverse side of the board.

[0066] Furthermore, the second nozzle 82 is tilted towards the second part of the conveyor belt 2 located between its discharge end and the first blowing mechanism 6, so that the blowing port II of the second blowing mechanism 8 can form an angle with the reverse side of the plate, thereby achieving tilted blowing. Preferably, the angle is 45 degrees, so that the debris detachment angle is greater than 90 degrees, thereby effectively improving cleaning efficiency.

[0067] Preferably, the fixing rod 81 is detachably mounted on the frame 1, thereby facilitating the replacement or maintenance of the second nozzle 82.

[0068] More preferably, along the conveying direction of the vertical conveyor belt 2, the distance 3 between the two outermost second nozzles 82 is not less than the width of the plate, so that the blowing port II can better cover the back of the plate, thereby ensuring the cleaning effect.

[0069] It should also be noted that since the back of the board is facing down, some debris can fall off under its own weight. The remaining debris can be completely removed by blowing it away with air from the second nozzle 82.

[0070] To achieve closed-loop dust removal, based on any of the above embodiments, as a preferred embodiment, this application further includes a sealing cover. The sealing cover is disposed around the blowing assembly and has a dust suction hole for connecting a negative pressure device to suck up debris or impurities, thereby sealing the debris blown from the board within the sealing cover, preventing dust from escaping, reducing pollution to the working environment, and preventing harm to the health of operators.

[0071] In summary, the automatic purging device for sheet metal provided in this application has the following main advantages:

[0072] (1) Automatic chip removal on both sides of the board eliminates manual intervention and can shorten the processing time of a single piece to about 3.2 seconds, greatly improving cleaning efficiency and avoiding the risk of secondary pollution.

[0073] (2) The first blowing mechanism 6 and the second blowing mechanism 8 are respectively placed above the front side and below the back side of the board. The two work together to effectively improve the cleaning effect.

[0074] (3) A closed dust removal environment was constructed, with a dust escape rate of less than 0.3%, thereby reducing pollution to the working environment and preventing harm to the health of operators.

[0075] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] The above provides a detailed description of the automatic plate blowing device provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An automatic blowing device for sheet metal, characterized in that, Includes a purging assembly, the purging assembly comprising: The frame (1) has two parallel conveyor belts (2) with a spacing (3) at its top, which are used to convey plates. The top of the frame (1) also has an opening (4) which extends along the conveying direction of the conveyor belts (2) and is located below the spacing (3). The first sensor (5) is located on the frame (1) near the feed end of any of the conveyor belts (2) to detect whether the plate material is present. The first purging mechanism (6) is located above the top of the frame (1) and in front of the first sensor (5) along the conveying direction of the conveyor belt (2), and the purging port I of the first purging mechanism (6) is arranged facing the upper end face of the two conveyor belts (2). The second sensor (7) is located on the frame (1) near the discharge end of any of the conveyor belts (2) to detect whether the plate material is present. The second purging mechanism (8) is located below the top of the frame (1) and in front of the second sensor (7) along the conveying direction of the conveyor belt (2), and the purging port II of the second purging mechanism (8) is arranged facing the lower end face of the two conveyor belts (2). The control unit is connected to the first sensor (5), the first purging mechanism (6), the second sensor (7), and the second purging mechanism (8).

2. The automatic sheet metal blowing device according to claim 1, characterized in that, The first sensor (5) is set to two, and the two first sensors (5) are arranged along the conveying direction perpendicular to the conveyor belt (2) and are respectively adjacent to the two conveyor belts (2). The second sensor (7) is configured as two, and the two second sensors (7) are arranged along the conveying direction perpendicular to the conveyor belt (2) and adjacent to the two conveyor belts (2) respectively.

3. The automatic sheet metal blowing device according to claim 2, characterized in that, Both the first sensor (5) and the second sensor (7) are trigger-type sensors.

4. The automatic sheet metal blowing device according to claim 1, characterized in that, The first portion of the conveyor belt (2) located between its feed end and the first purging mechanism (6) forms an angle with the purging port I; The second portion of the conveyor belt (2) located between its discharge end and the first purging mechanism (6) forms an angle with the purging port II.

5. The automatic sheet metal blowing device according to claim 1, characterized in that, The first purging mechanism (6) includes a bracket (61), a plurality of first nozzles (62) and a plurality of first air pumps that are all signal-connected to the control unit. The bracket (61) is mounted above the frame (1) and there is a space between its top plate and the conveyor belt (2). The plurality of first nozzles (62) are spaced apart on the top plate along the conveying direction perpendicular to the conveyor belt (2) to form the purging port I, and are connected to the plurality of first air pumps one by one.

6. The automatic sheet metal blowing device according to claim 5, characterized in that, The first nozzle (62) is tilted toward the first part of the conveyor belt (2) located between its feed end and the first purging mechanism (6).

7. The automatic sheet metal blowing device according to claim 5, characterized in that, The first blowing mechanism (6) further includes a brush roller (64) and a driver connected to the control unit. The driver is connected to the brush roller (64). The brush roller (64) is rotatably disposed in the space about its axis and has a board channel between it and the conveyor belt (2) for the board to pass through. The brush roller (64) is located on the side of the nozzle facing away from the first sensor (5). The axis of the brush roller (64) is perpendicular to the conveying direction of the conveyor belt (2).

8. The automatic sheet metal blowing device according to claim 1, characterized in that, The second purging mechanism (8) includes a fixed rod (81), a plurality of second nozzles (82) and a plurality of second air pumps that are all signal-connected to the control unit. The fixed rod (81) is located below the top of the frame (1). The plurality of second nozzles (82) are spaced apart on the fixed rod (81) along the conveying direction perpendicular to the conveyor belt (2) to form the purging port II, and are connected to the plurality of second air pumps one by one.

9. The automatic sheet metal blowing device according to claim 8, characterized in that, The second nozzle (82) is tilted toward the second part of the conveyor belt (2) located between its discharge end and the first blowing mechanism (6).

10. The automatic plate blowing device according to any one of claims 1 to 8, characterized in that, It also includes a sealing cover, which is located around the purge assembly and has a suction hole for connecting a negative pressure device to suck up debris or impurities.

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