Coating machine for circuit board

Abstract

The utility model discloses a coating machine for a circuit board, and belongs to the technical field of circuit board manufacturing equipment, the coating machine for the circuit board comprises a dust removal mechanism, the dust removal mechanism comprises a lifting drive and a dust removal part, the dust removal part comprises a cover body, a wind cleaning component and a collector, and the wind cleaning component and the collector are respectively connected to two opposite ends of the cover body; a coating mechanism; the conveying mechanism comprises a conveying assembly and a plurality of material frames, the material frames are connected to the conveying assembly and used for bearing circuit boards, the conveying assembly is used for sequentially conveying the multiple material frames to the dust removal mechanism and the coating mechanism, and the lifting drive is in transmission connection with the cover body so as to be used for driving the cover body and the material frames to be in butt joint and separated; the cleaning damage to the surface of the circuit board can be reduced, and dust collection is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board manufacturing equipment, in particular to a coating machine for circuit boards. Background Art

[0002] During the production process of circuit boards, impurities such as dust, rosin, solder, etc. are bound to remain on the surface. If the impurities are not handled in time during the lamination operation of the circuit boards, the manufacturing of the finished circuit boards will be adversely affected.

[0003] In the related technology, the utility model patent with application number CN202322533442.X and name: Circuit board surface coating machine discloses a technical solution of cleaning the surface of the circuit board with a cleaning brush, and then using a fan to extract the scattered and floating dust into the dust collecting trough.

[0004] However, the above patent has at least the following defects: the rotating wiping method using a cleaning brush is likely to cause damage to the surface of the circuit board, and the floating dust and other impurities are likely to pollute other circuit boards and workshops. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a coating machine for a circuit board, which is beneficial to reducing the cleaning damage caused to the surface of the circuit board and enhancing the collection of dust.

[0006] According to the embodiment of the utility model, the coating machine for circuit boards includes: a dust removal mechanism, including a lifting drive and a dust removal component, the dust removal component includes a cover body, an air cleaning component and a collector, the air cleaning component and the collector are respectively connected to the back ends of the cover body; a coating mechanism; a conveying mechanism, including a conveying component and a plurality of material frames, the material frames are connected to the conveying component, the material frames are used to support the circuit boards, the conveying component is used to convey the plurality of material frames to the dust removal mechanism and the coating mechanism in sequence, and the lifting drive is transmission-connected to the cover body to drive the cover body to dock and separate with the material frame.

[0007] The coating machine for circuit boards according to the embodiments of the utility model has at least the following beneficial effects: the conveying mechanism includes a conveying assembly and a plurality of material frames, the material frames can be used to support the circuit boards, and the conveying assembly is used to convey the plurality of material frames to the dust removal mechanism and the coating mechanism in sequence; when the material frames are conveyed to the dust removal mechanism, the lifting drive can drive the cover body to dock with the material frames, the material frames and the circuit boards can jointly close the lower end opening of the cover body, so that the material frames, the circuit boards and the cover body jointly form a relatively closed cleaning chamber; the air cleaning component and the collector are respectively connected to the back ends of the cover body; under the blowing action of the air cleaning component, the dust, rosin, solder and other impurities remaining on the surface of the circuit board can be specifically removed, and the collector can be used to collect impurities separated from the circuit board, and the cleaning chamber can be cleaned. After cleaning is completed, the lifting drive can drive the cover body to separate from the material frame, thereby eliminating the limiting effect of the cover body on the conveying component. Under the conveying action of the conveying component, the circuit board after cleaning is transferred to the coating mechanism for coating. The coating machine for the circuit board adopts wind energy to clean the circuit board. Compared with the direct contact cleaning method, it is beneficial to reduce or avoid damage to the surface of the circuit board. The coating machine for the circuit board adopts the combination of the cover body and the material frame, which is beneficial to form a relatively closed cleaning chamber, which is beneficial to achieve targeted cleaning of the circuit board, and is beneficial to enhance the collection effect of the collector on impurities such as dust, and is beneficial to avoid the problem of dust and other impurities flying and causing pollution to other circuit boards or workshops.

[0008] According to some embodiments of the utility model, the utility model also includes a frame, the conveying assembly includes a first motor and two chain-moving components arranged on the left and right, the chain-moving components include a chain and at least two sprockets, the two sprockets are arranged at a front-to-back interval and are both rotatably connected to the frame, the chain is wound around the two sprockets, the left and right ends of the material frame are respectively connected to the chains of the two chain-moving components, and the first motor is used to drive the two chain-moving components to rotate synchronously.

[0009] According to some embodiments of the utility model, the chain moving component also includes an upper support bar with two ends extending left and right, and the chain is divided into an upper chain and a lower chain along the two sprockets, and the upper support bar is used to abut against the lower end of the upper chain.

[0010] According to some embodiments of the utility model, the chain moving component also includes a lower supporting bar with two ends extending left and right, and the lower supporting bar is used to abut against the upper end of the lower chain.

[0011] According to some embodiments of the present invention, a receiving groove is provided at the upper end of the material frame, and the receiving groove is used to receive the circuit board.

[0012] According to some embodiments of the present invention, the material frame is provided with a plurality of accommodating grooves arranged in an array.

[0013] According to some embodiments of the utility model, the lifting drive includes an oil cylinder and guide columns extending up and down, and the oil cylinder is used to drive the cover body to slide back and forth along the guide columns.

[0014] According to some embodiments of the utility model, the air cleaning component includes a first fan and a plurality of nozzles, the plurality of nozzles are arranged in a transverse arrangement and connected to the inner wall surface of the cover body, and the first fan is used to communicate with the plurality of nozzles.

[0015] According to some embodiments of the utility model, the air cleaning component also includes a transmission rod and a second motor, the transmission rod is rotatably connected to the inner wall of the cover body, multiple nozzles are connected to the transmission rod, and the second motor is transmission-connected to the transmission rod to drive the transmission rod to rotate forward and reverse.

[0016] According to some embodiments of the utility model, the collector includes a filter plate, and the inner wall surface of the cover body facing the wind cleaning component is provided with a collecting groove, the collecting groove is connected to the filter plate, and the filter plate is connected to the first fan.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic structural diagram of a coating machine for a circuit board (part of the frame is omitted) according to an embodiment of the utility model;

[0020] Figure 2 A top view of a coating machine for a circuit board according to an embodiment of the utility model;

[0021] Figure 3 for Figure 2 AA cross-sectional view of a coating machine for a circuit board shown in FIG.

[0022] Figure 4 for Figure 2 BB cross-sectional view of a coating machine for a circuit board shown in FIG.

[0023] Figure 5 This is a schematic structural diagram of a coating machine for circuit boards (part of the cover is omitted) according to an embodiment of the utility model.

[0024] Figure Number:

[0025] 110, dust removal component; 111, nozzle; 112, first fan; 113, transmission rod; 114, second motor; 115, filter plate; 116, cover body; 117, collection tank; 120, lifting drive; 121, guide column; 122, oil cylinder;

[0026] 210, conveying assembly; 211, chain; 212, sprocket; 213, upper support bar; 214, lower support bar; 215, first motor; 220, material frame; 221, accommodating tank. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 5 As shown, a coating machine for circuit boards according to an embodiment of the utility model comprises: a dust removal mechanism, a coating mechanism and a conveying mechanism.

[0032] Reference Figure 1 and Figure 2 As shown, the conveying mechanism includes a conveying component 210 and a plurality of material frames 220. The conveying direction of the conveying component 210 is from back to front, and the dust removal mechanism and the coating mechanism are arranged in sequence in the conveying direction of the conveying component 210. The material frame 220 is used to support the circuit board, and the conveying component 210 is used to sequentially convey the plurality of material frames 220 to the dust removal mechanism and the coating mechanism. The dust removal mechanism is used to perform dust removal on the circuit board in the material frame 220, and the coating mechanism is used to perform coating on the circuit board after dust removal, which is beneficial to improve the coating effect of the circuit board.

[0033] Reference Figure 1 and Figure 2As shown, specifically, the dust removal mechanism includes a lifting drive 120 and a dust removal component 110, and the dust removal component 110 includes a cover body 116, a wind cleaning component and a collector, and the wind cleaning component and the collector are respectively connected to the two opposite ends of the cover body 116, and the opening direction of the cover body 116 is set toward the conveying assembly 210. The lifting drive 120 is connected to the cover body 116 in a transmission manner to drive the cover body 116 to move closer to or away from the material frame 220 on the conveying assembly 210, that is, to achieve the docking and separation of the cover body 116 and the material frame 220.

[0034] Reference Figure 3 and Figure 4 As shown, the user can place the circuit board in the material frame 220. Under the conveying action of the conveying assembly 210, the material frame 220 is conveyed to the dust removal mechanism. The lifting drive 120 can drive the cover body 116 to dock with the material frame 220. The material frame 220 and the circuit board can jointly close the lower end opening of the cover body 116, so that the material frame 220, the circuit board and the cover body 116 together form a relatively closed cleaning chamber. The air cleaning component and the collector are respectively connected to the two ends of the cover body 116 facing away from each other. Under the blowing action of the air cleaning component, the dust, rosin, solder and other impurities remaining on the upper surface of the circuit board can be removed in a targeted manner, and the collector can be used to collect impurities separated from the circuit board.

[0035] Reference Figure 3 and Figure 4 As shown, after cleaning is completed, the lifting drive 120 can drive the cover body 116 to separate from the material frame 220, thereby eliminating the limiting effect of the cover body 116 on the conveying component 210. Under the conveying effect of the conveying component 210, the circuit board after cleaning is transferred to the coating mechanism for coating. The coating machine for the circuit board uses wind energy to clean the circuit board. Compared with the direct contact cleaning method, it is beneficial to reduce or avoid damage to the surface of the circuit board. The coating machine for the circuit board uses the cover body 116 and the material frame 220 to form a relatively closed cleaning chamber, which is beneficial to achieve targeted cleaning of the circuit board, and is beneficial to enhance the collection effect of the collector on impurities such as dust, which is beneficial to avoid the problem of impurities such as dust flying and causing pollution to other circuit boards or workshops.

[0036] Reference Figure 3 and Figure 4 As shown, specifically, a card slot is provided at the outer edge of the material frame 220. Under the driving action of the lifting drive 120, after the cover body 116 moves downward, the lower edge of the cover body 116 can be engaged with the card slot to achieve the docking of the cover body 116 and the material frame 220, which is conducive to forming a relatively closed cleaning space between the material frame 220 and the cover body 116.

[0037] Reference Figure 1 and Figure 2As shown, it is understandable that the circuit board coating machine also includes a frame, which is used to provide support for the conveying component 210, and the lower end of the frame is used to contact with a supporting plane such as the ground.

[0038] Reference Figure 1 and Figure 2 As shown, specifically, the conveying assembly 210 includes a first motor 215 and two chain-driven components arranged on the left and right, the chain-driven components include a chain 211 and at least two sprockets 212, the two sprockets 212 are arranged in a front-to-back interval and are both rotatably connected to the frame, the chain 211 is wound between the two sprockets 212 to achieve a meshing connection between the chain 211 and the sprockets 212.

[0039] Reference Figure 1 and Figure 2 As shown, the material frame 220 is arranged between the two chain moving parts, and the left end and the right end of the material frame 220 are respectively connected to the chains 211 of the two chain moving parts, and multiple material frames 220 are arranged circumferentially around the chain 211. The first motor 215 is used to drive the two chain moving parts to rotate synchronously. Under the rotation of the two chains 211, the multiple material frames 220 are driven to rotate, so that the multiple material frames 220 can pass through the dust removal mechanism and the coating mechanism.

[0040] Reference Figure 1 and Figure 2 As shown, it can be understood that the chain-moving component also includes an upper support bar 213 extending forward and backward at both ends, the upper support bar 213 is fixedly connected to the frame, and the chain 211 is divided into an upper chain and a lower chain along the two sprockets 212, and the upper support bar 213 is used to abut against the lower end of the upper chain.

[0041] Reference Figure 3 and Figure 4 As shown, considering that the material frame 220 is connected to the chain 211, and the material frame 220 needs to withstand the downward pressure exerted by the lifting drive 120 on the cover body 116, in order to avoid the problem of the chain 211 being broken under pressure, the chain-driven component of the circuit board coating machine also includes an upper support bar 213, which is connected to the frame, and the chain 211 is separated into an upper chain and a lower connection along two sprockets 212, and the upper support bar 213 is used to abut against the lower end of the upper chain.

[0042] Reference Figure 3 and Figure 4 As shown, the coating machine for the circuit board supports the upper chain through the upper support bar 213, which is beneficial to reduce the bending and deformation of the upper chain caused by the downward pressure of the cover body 116, and is beneficial to avoid the problem of looseness or breakage of the upper chain due to excessive deformation. The upper support bar 213 is set to share the pressure on the upper chain to increase the service life of the upper chain.

[0043] Reference Figure 3 and Figure 4As shown, the adapted chain-moving component also includes a lower support bar 214 with two ends extending forward and backward, the lower support bar 214 is connected and fixed to the frame, the lower support bar 214 is used to abut against the upper end of the lower chain, the lower support bar 214 is used to support the lower chain, and cooperate with the setting of the upper support bar 213 to enable the upper chain and the lower chain to maintain a straight conveyance, which can effectively share the pressure of the chain 211, thereby reducing the transmission error of the chain 211, which is beneficial to reducing the risk of the chain 211 loosening or even breaking.

[0044] Reference Figure 3 and Figure 4 As shown, specifically, the upper support bar 213 and the lower support bar 214 are both engaged with the chain 211, which is beneficial to improve the connection stability between the upper support bar 213 and the lower support bar 214 and the chain 211, so as to reduce the problem of the chain 211 escaping from the upper support bar 213 or the lower support bar 214.

[0045] Reference Figure 1 and Figure 2 As shown, it can be understood that a receiving groove 221 is provided at the upper end of the material frame 220, and the receiving groove 221 can be used to receive the circuit board. When the circuit board is placed in the receiving groove 221, the inner wall surface of the receiving groove 221 can be abutted against the edge of the circuit board, thereby realizing the positioning and limiting of the circuit board and the material frame 220.

[0046] Reference Figure 1 and Figure 2 As shown, when the conveying component 210 conveys the material frame 220 to the dust removal mechanism, the lifting drive 120 can drive the cover body 116 to connect with the material frame 220. Under the blowing action of the air cleaning component, the setting of the accommodating groove 221 is conducive to limiting the movement of the circuit board relative to the conveying component 210, which is conducive to reducing the wind pressure restriction on the air cleaning component. The air cleaning component adopts a larger wind pressure, which is conducive to enhancing the cleaning effect on the surface of the circuit board and ensuring the effect of the coating operation on the circuit board.

[0047] Reference Figure 1 and Figure 2 As shown, it can be understood that a plurality of receiving grooves 221 arranged in an array are provided at the material frame 220. By providing a plurality of receiving grooves 221, the dust removal mechanism can realize dust removal operations on a plurality of circuit boards at a time, which is beneficial to improving the dust removal efficiency of a plurality of circuit boards. In conjunction with the provision of the coating mechanism, it is beneficial to realize the gluing operations on a plurality of circuit boards.

[0048] Reference Figure 1 and Figure 2As shown, it can be understood that the lifting drive 120 includes a cylinder 122, a slider, and a guide column 121 extending up and down, the guide column 121 is fixedly connected to the frame, the slider and the guide column 121 are slidably connected along the up and down directions, the cover body 116 is fixedly connected to the slider, and the rotation of the slider is limited by the mutual abutment between the slider and the guide column 121, and the movement of the slider is limited along the up and down directions.

[0049] Reference Figure 1 and Figure 2 As shown, the oil cylinder 122 is transmission-connected with the slider to drive the slider to slide up and down along the guide column 121 , so that the oil cylinder 122 drives the cover body 116 in the up and down directions.

[0050] Reference Figure 1 and Figure 2 As shown, specifically, two groups of guide pillars 121 are arranged, and the two groups of guide pillars 121 are respectively located on the left and right sides of the conveying component 210, the left end of the slider is slidably connected to the left guide pillar 121, and the right end of the slider is slidably connected to the right guide pillar 121. The arrangement of multiple groups of guide pillars 121 is helpful to reduce the relative shaking of the slider relative to the guide pillars 121, and is helpful to reduce the shaking of the cover body 116 during the lifting process.

[0051] Reference Figure 1 , Figure 2 and Figure 5 As shown, it can be understood that the air cleaning component includes a first fan 112 and a plurality of nozzles 111, the plurality of nozzles 111 are arranged horizontally and connected to the inner wall surface of the cover body 116, and the first fan 112 can be connected to the plurality of nozzles 111 through a pipeline. Under the blowing action of the first fan 112, the air flow can be ejected from the plurality of nozzles 111, and the structural arrangement of the nozzles 111 is conducive to enhancing the air pressure of the air flow, so that the air flow can act more effectively on the circuit board on the material frame 220, thereby achieving the removal of impurities such as dust remaining on the upper surface of the circuit board.

[0052] Reference Figure 3 , Figure 4 and Figure 5 As shown, specifically, the air cleaning component also includes a transmission rod 113 and a second motor 114. The transmission rod 113 is rotatably connected to the inner wall surface of the cover body 116. Both ends of the transmission rod 113 are arranged to extend laterally. Multiple nozzles 111 are connected to the transmission rod 113, and the output shaft of the second motor 114 is transmission-connected to the transmission rod 113 to drive the transmission rod 113 to rotate forward or reverse.

[0053] Reference Figure 3 , Figure 4 and Figure 5As shown, the coating machine for the circuit board controls the reciprocating rotation of the transmission rod 113 through the second motor 114, so that the air outlet direction of the nozzle 111 is in a reciprocating swinging posture, which is beneficial to changing the position and direction of the airflow acting on the circuit board, thereby enhancing the airflow cleaning effect on the circuit board, and is beneficial to reducing the cleaning dead angle on the circuit board to achieve comprehensive cleaning of the circuit board.

[0054] It should be understood that in some other embodiments, the air cleaning component also includes a spring, a pressure plate and a connecting rod. The pressure plate is elastically connected to the cover body 116 through a spring, and the two ends of the pressure plate extend laterally. The nozzle 111 is located below the pressure plate, and the nozzle 111 is rotatably connected to the cover body 116. A slide groove is provided on the side of the nozzle 111, the upper end of the connecting rod is connected to the pressure plate, and the lower end of the connecting rod is arranged in the slide groove and is slidably connected to the slide groove.

[0055] The air cleaning component also includes a third motor and a cam. The output shaft of the third motor is connected to the cam in a transmission manner to drive the cam to rotate, and the cam is in contact with the pressure plate. When the third motor drives the cam to rotate, the cam can drive the pressure plate to press down, and the pressure plate drives the connecting rod to move down. The connecting rod slides in the slide slot, thereby changing the direction of the nozzle 111, which is conducive to changing the position and direction of the airflow acting on the circuit board, thereby enhancing the airflow cleaning effect on the circuit board, and is conducive to reducing the cleaning dead angle on the circuit board to achieve comprehensive cleaning of the circuit board. As the cam continues to rotate, the pressure plate resets upwards in coordination with the elastic effect of the spring, synchronously driving the connecting rod to move upwards, and the lower end of the connecting rod continues to move in the slide slot, thereby changing the direction of the nozzle 111 again to achieve the function of reciprocating swing of the direction of the nozzle 111.

[0056] Reference Figure 3 , Figure 4 and Figure 5 As shown, it can be understood that in this embodiment, a plurality of receiving grooves 221 are arranged on the material frame 220, and each receiving groove 221 corresponds to at least one nozzle 111. Through the arrangement of the plurality of nozzles 111, air flow flushing of the circuit boards in the plurality of receiving grooves 221 can be achieved, which is beneficial to reduce damage to the surface of the circuit board compared to the direct contact cleaning method.

[0057] Reference Figure 3 , Figure 4 and Figure 5 As shown, it can be understood that the collector includes a filter plate 115, and a collection groove 117 is provided on the inner wall surface of the cover body 116 facing the wind cleaning component. A plurality of collection ports are connected to the collection groove 117. The collection ports can be connected to one end of the filter plate 115 through a pipeline, and the other end of the filter plate 115 is connected to the first fan 112 through a pipeline.

[0058] Reference Figure 3 , Figure 4 and Figure 5As shown, under the suction action of the first fan 112, negative pressure is generated at the collecting tank 117, so that impurities such as dust blown up by the wind cleaning component are collected, and the impurities flow to the filter plate 115 after passing through the collecting port and the pipeline, and are then filtered by the filter plate 115 to remove impurities such as dust, rosin, and solder.

[0059] Reference Figure 3 , Figure 4 and Figure 5 As shown, the user can subsequently remove the collected impurities such as dust, rosin, solder, etc. by replacing the filter plate 115.

[0060] It should be understood that in some other embodiments, the coating machine for the circuit board includes two dust removal components 110, one of which is located above the conveying mechanism, and the other is located between the upper chain and the lower chain, so that the upper end of the material frame 220 can correspond to the upper dust removal mechanism, and the upper dust removal mechanism is used to remove dust and other impurities on the upper surface of the circuit board.

[0061] The lower end of the receiving groove 221 of the material frame 220 is connected with a gap, and the dust removal mechanism below can remove dust and other impurities on the lower surface of the circuit board through the gap, which is beneficial to improve the cleanliness of the circuit board and realize double-sided cleaning of the circuit board.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A coating machine for a circuit board, characterized in that: include: The dust removal mechanism comprises a lifting drive (120) and a dust removal component (110), wherein the dust removal component (110) comprises a cover body (116), an air cleaning component and a collector, wherein the air cleaning component and the collector are respectively connected to two opposite ends of the cover body (116); Coating mechanism; The conveying mechanism comprises a conveying component (210) and a plurality of material frames (220), wherein the material frames (220) are connected to the conveying component (210), the material frames (220) are used to support circuit boards, the conveying component (210) is used to sequentially convey the plurality of material frames (220) to the dust removal mechanism and the coating mechanism, and the lifting drive (120) is transmission-connected to the cover body (116) so as to drive the cover body (116) to dock and separate from the material frames (220).

2. The circuit board coating machine according to claim 1, characterized in that: The conveying assembly (210) further comprises a frame, wherein the conveying assembly (210) comprises a first motor (215) and two chain-moving components arranged on the left and right, wherein the chain-moving components comprise a chain (211) and at least two sprocket wheels (212), wherein the two sprocket wheels (212) are arranged at intervals in front and back and are both rotatably connected to the frame, wherein the chain (211) is wound around the two sprocket wheels (212), wherein the left end and the right end of the material frame (220) are respectively connected to the chains (211) of the two chain-moving components, and the first motor (215) is used to drive the two chain-moving components to rotate synchronously.

3. The circuit board coating machine according to claim 2, characterized in that: The chain moving component also includes an upper support bar (213) with two ends extending forward and backward, the chain (211) is divided into an upper chain and a lower chain along the two sprocket wheels (212), and the upper support bar (213) is used to abut against the lower end of the upper chain.

4. The circuit board coating machine according to claim 3, characterized in that: The chain moving component also includes a lower support bar (214) with two ends extending forward and backward, and the lower support bar (214) is used to abut against the upper end of the lower chain.

5. The circuit board coating machine according to claim 1, characterized in that: The upper end of the material frame (220) is provided with a receiving groove (221), and the receiving groove (221) is used for receiving a circuit board.

6. The circuit board coating machine according to claim 5, characterized in that: The material frame (220) is provided with a plurality of accommodating grooves (221) arranged in an array.

7. The circuit board coating machine according to claim 1, characterized in that: The lifting drive (120) comprises an oil cylinder (122) and a guide column (121) extending up and down, and the oil cylinder (122) is used to drive the cover body (116) to slide back and forth along the guide column (121).

8. The circuit board coating machine according to claim 1, characterized in that: The air cleaning component comprises a first fan (112) and a plurality of nozzles (111); the plurality of nozzles (111) are arranged in a transverse arrangement and connected to the inner wall surface of the cover body (116); and the first fan (112) is used to communicate with the plurality of nozzles (111).

9. The circuit board coating machine according to claim 8, characterized in that: The air cleaning component further comprises a transmission rod (113) and a second motor (114); the transmission rod (113) is rotatably connected to the inner wall surface of the cover body (116); the plurality of nozzles (111) are all connected to the transmission rod (113); and the second motor (114) is transmission-connected to the transmission rod (113) to drive the transmission rod (113) to rotate forward and reverse.

10. The circuit board coating machine according to claim 8, characterized in that: The collector comprises a filter plate (115); the inner wall surface of the cover body (116) facing the wind cleaning component is provided with a collecting groove (117); the collecting groove (117) is connected to the filter plate (115); and the filter plate (115) is connected to the first fan (112).

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