Wind knife roller device and printed circuit board horizontal production line

Abstract

The present application provides a wind knife roller device and a horizontal production line for printed circuit boards. The wind knife roller device includes a roller shaft and a wind knife roller assembly; the wind knife roller assembly includes an air inlet roller and an air outlet roller, the air inlet roller and the air outlet roller are both sleeved on the roller shaft, the air inlet roller has an air inlet cavity, the air inlet roller is provided with an air inlet hole connected to the air inlet cavity, the air outlet roller has an air outlet cavity connected to the air inlet cavity, the air outlet roller is also provided with an air outlet hole connected to the air outlet cavity, and the air outlet hole is arranged toward the printed circuit board. The cleaning gas enters the air outlet cavity through the air inlet cavity, and then blows toward the printed circuit board through the air outlet hole, so as to facilitate the surface cleaning of the printed circuit board during the transmission of the printed circuit board. It is only necessary to replace the original roller on the roller shaft with the air inlet roller and the air outlet roller to realize the transmission and surface cleaning of the printed circuit board, without the need for large-scale modification, which effectively reduces the production cost of the printed circuit board.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit boards, and in particular to a wind knife roller device and a horizontal production line for printed circuit boards. Background Art

[0002] The horizontal production line of printed circuit boards uses rollers as rotating parts. Through a certain combination of rules, it drives the printed circuit boards through the production line to complete the chemical treatment and surface processing of the printed circuit boards. According to the needs, the processing technology and characteristics of each stage, each part, and each cylinder of the production line are different, so various types of rollers are derived. The horizontal production line mainly relies on a combination of solid water-retaining rollers, water-absorbing sponges and strong wind knives to meet production needs. Among them, the strong wind knife is used to remove the medicine and water stains on the printed circuit boards after washing.

[0003] However, traditional rollers can only carry the passage of boards, and their water-blocking effect is very limited. When printed circuit boards pass through, it is impossible to remove the chemicals and water stains in time, causing cross-contamination of different types of chemicals. If air knives are applied to horizontal production lines, it is necessary to modify the conveyor belt of the horizontal production line, that is, to remove some rollers and install the air knives in them. Moreover, the space required for strong wind knives is large, resulting in excessively high costs for the modification, which in turn leads to an increase in the production cost of printed circuit boards. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a wind knife roller device and a printed circuit board horizontal production line that can effectively reduce production costs.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A wind knife roller device comprises: a roller and a wind knife roller assembly; the roller is used to be connected to the rotating shaft of the transmission motor of the horizontal production line of printed circuit boards; the wind knife roller assembly comprises an air inlet roller and an air outlet roller, the air inlet roller and the air outlet roller are both sleeved on the roller, the air inlet roller and the air outlet roller are both used to carry and transmit printed circuit boards, the air inlet roller has an air inlet cavity, the air inlet roller is provided with an air inlet hole connected to the air inlet cavity, the air inlet hole is used to introduce cleaning gas, the air outlet roller has an air outlet cavity connected to the air inlet cavity, the air outlet roller is also provided with an air outlet hole connected to the air outlet cavity, the air outlet hole is arranged toward the printed circuit board to remove surface foreign matter on the printed circuit board.

[0007] In one of the embodiments, the air inlet roller and the air outlet roller are arranged parallel to each other.

[0008] In one of the embodiments, the side wall of the air inlet roller abuts against the side wall of the air outlet roller.

[0009] In one embodiment, there are multiple air outlet rollers, and the multiple air outlet rollers are evenly distributed on the roller shaft.

[0010] In one of the embodiments, the air inlet roller is arranged corresponding to the end rollers of the plurality of air outlet rollers.

[0011] In one of the embodiments, the air inlet roller is located between any two adjacent air outlet rollers, and the air inlet cavity of the air inlet roller is communicated with the air outlet cavities of any two adjacent air outlet rollers.

[0012] In one of the embodiments, the wind knife roller assembly further includes a ventilation member, and the ventilation member is respectively connected to the air inlet cavity and the air outlet cavity.

[0013] In one of the embodiments, the air inlet roller is provided with a first through hole communicating with the air inlet cavity, and the first ventilation end of the ventilation member is communicated with the first through hole.

[0014] In one of the embodiments, the air outlet roller is provided with a second through hole connected to the air outlet cavity, and the second ventilation end of the ventilation member is connected to the second through hole.

[0015] A horizontal production line for printed circuit boards comprises the wind knife roller device described in any one of the above embodiments.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] The air inlet roller and the air outlet roller jointly support the transmission of the printed circuit board. The cleaning gas enters the air outlet cavity through the air inlet cavity and then blows toward the printed circuit board through the air outlet hole, so that the surface of the printed circuit board can be cleaned during the transmission of the printed circuit board, so that the medicine or water stains on the printed circuit board can be removed by the cleaning gas. Moreover, the transmission and surface cleaning of the printed circuit board can be realized by simply replacing the original rollers on the roller shaft with the air inlet roller and the air outlet roller, without the need for large-scale modification, which effectively reduces the production cost of the printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1is a schematic diagram of an air knife roller device in one embodiment;

[0020] Figure 2 for Figure 1 A cross-sectional view of the air inlet roller in the wind knife roller device shown;

[0021] Figure 3 for Figure 1 A cross-sectional view of an air outlet roller in the air knife roller device shown;

[0022] Figure 4 FIG. 4 is a cross-sectional view of an air outlet roller in another embodiment. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] The present invention relates to a wind knife roller device. In one embodiment, the wind knife roller device includes a roller and a wind knife roller assembly. The roller is used to connect with the rotating shaft of the transmission motor of the horizontal production line of printed circuit boards. The wind knife roller assembly includes an air inlet roller and an air outlet roller. The air inlet roller and the air outlet roller are both sleeved on the roller, and the air inlet roller and the air outlet roller are both used to carry and transmit printed circuit boards. The air inlet roller has an air inlet cavity, and the air inlet roller is provided with an air inlet hole connected to the air inlet cavity, and the air inlet hole is used to introduce cleaning gas. The air outlet roller has an air outlet cavity connected to the air inlet cavity, and the air outlet roller is also provided with an air outlet hole connected to the air outlet cavity, and the air outlet hole is arranged toward the printed circuit board to remove surface foreign matter on the printed circuit board. The air inlet roller and the air outlet roller jointly support the transmission of the printed circuit board. The cleaning gas enters the air outlet cavity through the air inlet cavity and then blows toward the printed circuit board through the air outlet hole, so that the surface of the printed circuit board can be cleaned during the transmission of the printed circuit board, so that the medicine or water stains on the printed circuit board can be removed by the cleaning gas. Moreover, the transmission and surface cleaning of the printed circuit board can be realized by simply replacing the original rollers on the roller shaft with the air inlet roller and the air outlet roller, without the need for large-scale modification, which effectively reduces the production cost of the printed circuit board.

[0027] See also Figure 1 , which is a schematic structural diagram of a wind knife roller device according to an embodiment of the present invention.

[0028] The wind knife roller device 10 of one embodiment includes a roller 100 and a wind knife roller assembly 200. The roller 100 is used to connect with the rotating shaft of the transmission motor of the horizontal production line of printed circuit boards. The wind knife roller assembly 200 includes an air inlet roller 210 and an air outlet roller 220. The air inlet roller 210 and the air outlet roller 220 are both sleeved on the roller 100, and the air inlet roller 210 and the air outlet roller 220 are both used to carry and transmit printed circuit boards. Please refer to Figure 2 and Figure 3 The air inlet roller 210 has an air inlet cavity 202, and the air inlet roller 210 is provided with an air inlet hole 204 connected to the air inlet cavity 202, and the air inlet hole 204 is used to introduce cleaning gas. The air outlet roller 220 has an air outlet cavity 206 connected to the air inlet cavity 202, and the air outlet roller 220 is further provided with an air outlet hole 208 connected to the air outlet cavity 206, and the air outlet hole 208 is arranged toward the printed circuit board to remove foreign matter on the surface of the printed circuit board.

[0029] In this embodiment, the air inlet roller 210 and the air outlet roller 220 jointly support the transmission of the printed circuit board, and the cleaning gas enters the air outlet chamber 206 through the air inlet chamber 202, and then blows toward the printed circuit board through the air outlet hole 208, so as to facilitate the surface cleaning of the printed circuit board during the transmission of the printed circuit board, so that the medicine or water stains on the printed circuit board are removed by the cleaning gas, and moreover, it is only necessary to replace the original rollers on the roller 100 with the air inlet roller 210 and the air outlet roller 220 to realize the transmission and surface cleaning of the printed circuit board without large-scale modification, thereby effectively reducing the production cost of the printed circuit board.

[0030] In one embodiment, see Figure 1 , the air inlet roller 210 and the air outlet roller 220 are arranged parallel to each other. In this embodiment, the interior of the air inlet roller 210 is connected with the interior of the air outlet roller 220, that is, the air inlet cavity 202 of the air inlet roller 210 is connected with the air outlet cavity 206 of the air outlet roller 220, that is, the gas in the air inlet roller 210 is output to the printed circuit board through the air outlet roller 220. The air inlet roller 210 is arranged to be parallel to the air outlet roller 220, so that the air inlet roller 210 and the air outlet roller 220 are jointly sleeved on the roller 100, so that the air inlet roller 210 and the air outlet roller 220 rotate coaxially, and then the centers of the air inlet roller 210 and the air outlet roller 220 are kept on the same straight line. In this way, when the roller 100 rotates, the air inlet roller 210 and the air outlet roller 220 rotate synchronously, so that the air inlet cavity 202 of the air inlet roller 210 and the air outlet cavity 206 of the air outlet roller 220 remain relative to each other, thereby facilitating the air inlet cavity 202 of the air inlet roller 210 and the air outlet cavity 206 of the air outlet roller 220 to always remain connected, ensuring air circulation between the air inlet roller 210 and the air outlet roller 220.

[0031] Further, the side wall of the air inlet roller 210 abuts against the side wall of the air outlet roller 220. In the present embodiment, the side wall of the air inlet roller 210 and the side wall of the air outlet roller 220 are in contact with each other. Specifically, when the air inlet roller 210 and the air outlet roller 220 are parallel to each other, the air inlet roller 210 and the air outlet roller 220 keep the sides in contact with each other, so that the air inlet roller 210 and the air outlet roller 220 are in close contact, thereby reducing the distance between the air inlet roller 210 and the air outlet roller 220, and further allowing the circumferential surface of the air inlet roller 210 and the circumferential surface of the air outlet roller 220 to form a bearing surface, so that when the surface of the printed circuit board is cleaned, a supporting force can also be provided for the printed circuit board, thereby providing transmission power for the transmission process of the printed circuit board.

[0032] In another embodiment, the number of the air outlet rollers 220 is multiple, and the multiple air outlet rollers 220 are evenly distributed on the roller 100. In this embodiment, the air outlet rollers 220 serve as the main transmission wheels of the printed circuit board, and the air outlet holes 208 are also opened on the air outlet rollers 220. The air outlet holes 208 blow out the clean gas in the air outlet cavity 206 to clean the printed circuit board. The circumferential surfaces of the multiple air outlet rollers 220 jointly form a transmission support surface to support and transport the printed circuit board, wherein the multiple air outlet rollers 220 are jointly installed on the roller 100. Specifically, the centers of the multiple air outlet rollers 220 are located on the roller 100, that is, the multiple air outlet rollers 220 are all sleeved on the roller 100, and the multiple air outlet rollers 220 are evenly distributed on the roller 100, so that the multiple air outlet rollers 220 form a large-area transmission plane, so that the transmission of the printed circuit board is smoother.

[0033] Further, the air inlet roller 210 is arranged corresponding to the end rollers of the plurality of air outlet rollers 220. In the present embodiment, the air inlet roller 210 is one of the plurality of rollers on the roller 100, that is, the air inlet roller 210 is the end roller of the rollers arranged in a row on the roller 100, that is, the air inlet roller 210 is arranged close to the end of the roller 100, so that the air inlet roller 210 is arranged away from the printed circuit board. In this way, when the printed circuit board passes through the wind knife roller device, the plurality of air outlet rollers 220 transport the printed circuit board, and the air inlet roller 210 is away from the printed circuit board, so that the air outlet pipe of the air blowing device is connected with the air inlet hole 204, so as to facilitate the introduction of clean gas into the air inlet chamber 202, and avoid the collision between the air outlet pipe of the air blowing device and the printed circuit board.

[0034] Furthermore, the air inlet roller 210 is located between any two adjacent air outlet rollers 220, and the air inlet cavity 202 of the air inlet roller 210 is connected to the air outlet cavity 206 of the two adjacent air outlet rollers 220. In this embodiment, the air inlet roller 210 is located in the middle of the roller 100, and the multiple air outlet rollers 220 on both sides of the air inlet roller 210 are used to transport different printed circuit boards, so that the multiple air outlet rollers 220 on the same roller 100 respectively transport two or more printed circuit boards, and the air inlet roller 210 can output clean gas to the air outlet rollers 220 on both sides, so as to guide the air to the air outlet rollers 220 on both sides at the same time.

[0035] In one embodiment, the wind knife roller assembly further includes a ventilation member, which is connected to the air inlet cavity and the air outlet cavity respectively. In this embodiment, the ventilation member is located between the air inlet roller and the air outlet roller, and the ventilation member connects the air inlet cavity with the air outlet cavity, so that the air inlet roller is connected to the inside of the air outlet roller, which is convenient for guiding the clean gas in the air inlet cavity to the multiple air outlet cavities. Specifically, the clean gas enters the ventilation member through the air inlet cavity of the air inlet roller, and then enters the multiple adjacent air outlet cavities in turn, so that the multiple air outlet rollers blow air to the printed circuit board at the same time to remove the liquid medicine or water stains on the printed circuit board.

[0036] Furthermore, the air inlet roller is provided with a first through hole communicating with the air inlet cavity, and the first ventilation end of the ventilation member is communicated with the first through hole. In this embodiment, the opening of the first through hole faces the air outlet roller, and the first ventilation end of the ventilation member corresponds to the first through hole, so that the interior of the air inlet roller is communicated with the ventilation member, so that the ventilation member connects the air inlet roller with other air outlet rollers.

[0037] Furthermore, the air outlet roller is provided with a second through hole connected to the air outlet cavity, and the second ventilation end of the ventilation member is connected to the second through hole. In this embodiment, the opening of the second through hole faces the air inlet roller, and the second ventilation end of the ventilation member corresponds to the second through hole, so that the interior of the air outlet roller is connected to the ventilation member, so that the ventilation member connects the air inlet roller with each of the air outlet rollers. In another embodiment, the ventilation member is a ventilation hose, the first end of the ventilation hose is connected to the first through hole, and the second end of the ventilation hose is connected to the second through hole.

[0038] It can be understood that the air outlet roller 220 serves as a transmission roller for the printed circuit board, that is, the circumferential surface of the air outlet roller 220 supports the printed circuit board, that is, the circumference of the air outlet roller 220 is used to transmit the printed circuit board. When the air outlet roller 220 transmits the printed circuit board, the air outlet hole 208 guides the clean gas so that the clean gas blows toward the printed circuit board. However, the air outlet hole 208 often blows the medicine or water stains on the printed circuit board into the medicine tank, which easily causes contamination of the medicine in the medicine tank.

[0039] In order to reduce the risk of medicine or water stains on the printed circuit board contaminating the medicine in the medicine tank, the number of the wind knife roller assemblies 200 is two, and the printed circuit board is arranged between the two wind knife roller assemblies 200. The air inlet roller 210 and the air outlet roller 220 of each wind knife roller assembly 200 are both in contact with the printed circuit board. There are multiple air inlet cavities 202 and multiple air outlet cavities 206, and each air inlet cavity 202 is connected to an air outlet cavity 206. There are multiple air outlet holes 208, and each air outlet hole 208 is connected to an air outlet cavity 206. The air outlet holes 208 are used to blow out the clean gas when rotating to a cleaning angle. The cleaning angle is the angle between the air outlet direction of the air outlet hole 208 and the transmission direction of the printed circuit board, and the cleaning angle is 110° to 160°.

[0040] In this embodiment, the opening of the air outlet hole 208 faces the surface of the printed circuit board, and the air outlet direction of the air outlet hole 208 forms an angle with the surface of the printed circuit board, so that the air outlet direction of the air outlet hole 208 and the printed circuit board are arranged at an angle to each other, so that the air outlet roller 220 blows air obliquely to the printed circuit board for cleaning. During the rotation of the air outlet roller 220, when each air outlet hole 208 of the air outlet roller 220 rotates to the cleaning angle, the air blowing device introduces the clean gas through the air inlet chamber 202 connected to the air outlet hole 208, so as to facilitate the oblique blowing of the printed circuit board, avoid blowing the medicine or water stains on the printed circuit board into the medicine tank, and effectively reduce the probability of the medicine or water stains on the printed circuit board contaminating the medicine in the medicine tank. Among them, the transmission direction of the printed circuit board is toward the medicine tank, and the cleaning angle is greater than 90°, so that the outlet direction of the clean gas is obliquely opposite to the transmission direction of the printed circuit board.

[0041] For further information, see Figure 3, in the radial direction of the air outlet roller 220, the aperture of the air outlet hole 208 gradually decreases, and the inner radius of the air outlet cavity 206 gradually increases. In this embodiment, the air outlet cavity 206 serves as the air storage space of the air outlet roller 220, that is, the air inlet cavity 202 of the air inlet roller 210 introduces the clean gas into the air outlet cavity 206. When the clean gas enters the air outlet cavity 206, the clean gas gradually fills the air outlet cavity 206. When the clean gas is continuously introduced, the pressure in the air outlet cavity 206 increases, and the inner radius of the air outlet cavity 206 gradually increases, so that the pressure of the clean gas in the air outlet cavity 206 increases rapidly to form high-pressure gas. After the clean gas in the air outlet chamber 206 is pressurized to form a gas with a relatively high pressure, the clean gas passes through the air outlet holes 208 with gradually decreasing apertures, that is, in the radial direction away from the air outlet roller 220, the apertures of the air outlet holes 208 gradually decrease, so that the clean gas blown out by the air outlet roller 220 increases again, so that the air outlet holes 208 of the air outlet roller 220 blow out strong wind, and then the air outlet roller 220 blows out high-pressure strong wind toward the printed circuit board, so as to facilitate the removal of more chemicals or water stains on the printed circuit board, effectively improve the cleaning efficiency of the printed circuit board, and thus improve the surface cleanliness of the printed circuit board.

[0042] In another embodiment, in the radial direction of the air inlet roller, the aperture of the air inlet hole gradually decreases and increases, so as to facilitate the rapid introduction of the clean gas into the air inlet chamber.

[0043] For further information, see Figure 4 The wind knife roller assembly 200 also includes a sealing plate 230, which is disposed in the air outlet cavity 206. The sealing plate 230 is rotatably connected to the inner wall of the air outlet cavity 206. The sealing plate 230 is used to open the air outlet hole 208 when the air outlet roller 220 rotates to the cleaning angle.

[0044] In this embodiment, the sealing plate 230 is located in the air outlet cavity 206, and the sealing plate 230 corresponds to the air outlet hole 208. When the air outlet angle of the air outlet hole 208 is outside the cleaning angle, the sealing plate 230 covers the air outlet hole 208 under the action of gravity, so that the air outlet hole 208 is blocked to prevent external dust or moisture from invading, thereby ensuring the cleanliness of the air outlet cavity 206, thereby preventing the stains in the air outlet cavity 206 from being blown onto the printed circuit board when the air is discharged. When the air outlet angle of the air outlet hole 208 is at the cleaning angle, the sealing plate 230 moves away from the air outlet hole 208 under the action of gravity, so that the air outlet hole 208 is opened, so that the high-pressure clean gas in the air outlet cavity 206 is blown out, thereby facilitating the surface wind cleaning of the printed circuit board.

[0045] In one embodiment, the present application also provides a horizontal production line for printed circuit boards, comprising the wind knife roller device described in any of the above embodiments. In this embodiment, the wind knife roller device comprises a roller shaft and a wind knife roller assembly. The roller shaft is used to connect with the rotating shaft of the transmission motor of the horizontal production line for printed circuit boards. The wind knife roller assembly comprises an air inlet roller and an air outlet roller. The air inlet roller and the air outlet roller are both sleeved on the roller shaft, and the air inlet roller and the air outlet roller are both used to carry and transmit printed circuit boards. The air inlet roller has an air inlet cavity, and the air inlet roller is provided with an air inlet hole connected to the air inlet cavity, and the air inlet hole is used to introduce cleaning gas. The air outlet roller has an air outlet cavity connected to the air inlet cavity, and the air outlet roller is also provided with an air outlet hole connected to the air outlet cavity, and the air outlet hole is arranged toward the printed circuit board to remove surface foreign matter on the printed circuit board. The air inlet roller and the air outlet roller jointly support the transmission of the printed circuit board. The cleaning gas enters the air outlet cavity through the air inlet cavity and then blows toward the printed circuit board through the air outlet hole, so that the surface of the printed circuit board can be cleaned during the transmission of the printed circuit board, so that the medicine or water stains on the printed circuit board can be removed by the cleaning gas. Moreover, the transmission and surface cleaning of the printed circuit board can be realized by simply replacing the original rollers on the roller shaft with the air inlet roller and the air outlet roller, without the need for large-scale modification, which effectively reduces the production cost of the printed circuit board.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wind knife roller device, characterized in that: include: A roller, the roller being used to be connected to a rotating shaft of a transmission motor of a horizontal production line of a printed circuit board; A wind knife roller assembly, the wind knife roller assembly includes an air inlet roller and an air outlet roller, the air inlet roller and the air outlet roller are both sleeved on the roller shaft, the air inlet roller and the air outlet roller are both used to carry and transmit a printed circuit board, the air inlet roller has an air inlet cavity, the air inlet roller is provided with an air inlet hole connected to the air inlet cavity, the air inlet hole is used to introduce cleaning gas, the air outlet roller has an air outlet cavity connected to the air inlet cavity, the air outlet roller is also provided with an air outlet hole connected to the air outlet cavity, the air outlet hole is arranged toward the printed circuit board to remove surface foreign matter on the printed circuit board; Wherein, the number of the wind knife roller assemblies is two, the printed circuit board is arranged between the two wind knife roller assemblies, the air inlet roller and the air outlet roller of each wind knife roller assembly are both in contact with the printed circuit board, the air inlet chamber and the air outlet chamber are both multiple, each of the air inlet chamber is connected with an air outlet chamber, the number of the air outlet holes is multiple, each of the air outlet holes is connected with an air outlet chamber, the air outlet holes are used to blow out the cleaning gas when rotating to a cleaning angle, the cleaning angle is the angle between the air outlet direction of the air outlet hole and the transmission direction of the printed circuit board, and the cleaning angle is 110° to 160°; The wind knife roller assembly also includes a sealing plate, which is arranged in the air outlet cavity and rotatably connected to the inner wall of the air outlet cavity, and is used to open the air outlet hole when the air outlet roller rotates to the cleaning angle; and, when the air outlet angle of the air outlet hole is outside the cleaning angle, the sealing plate covers the air outlet hole so that the air outlet hole is blocked; when the air outlet angle of the air outlet hole is at the cleaning angle, the sealing plate is away from the air outlet hole so that the air outlet hole is open.

2. The wind knife roller device according to claim 1, characterized in that: The air inlet roller and the air outlet roller are arranged parallel to each other.

3. The wind knife roller device according to claim 2, characterized in that: The side wall of the air inlet roller abuts against the side wall of the air outlet roller.

4. The wind knife roller device according to claim 2, characterized in that: There are multiple air outlet rollers, and the multiple air outlet rollers are evenly distributed on the roller shaft.

5. The wind knife roller device according to claim 4, characterized in that: The air inlet roller is located between any two adjacent air outlet rollers, and the air inlet cavity of the air inlet roller is communicated with the air outlet cavities of the two adjacent air outlet rollers.

6. The wind knife roller device according to claim 1, characterized in that: The wind knife roller assembly also includes a ventilation member, which is communicated with the air inlet cavity and the air outlet cavity respectively.

7. The wind knife roller device according to claim 6, characterized in that: The air inlet roller is provided with a first through hole communicating with the air inlet cavity, and the first ventilation end of the ventilation member is communicated with the first through hole.

8. The wind knife roller device according to claim 6, characterized in that: The air outlet roller is provided with a second through hole communicating with the air outlet cavity, and the second ventilation end of the ventilation member is communicated with the second through hole.

9. A horizontal production line for printed circuit boards, characterized in that: The invention comprises a wind knife roller device as claimed in any one of claims 1 to 8.

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