A PCB board flux spraying device with chain protection function

Abstract

The present invention relates to the field of PCB solder flux spraying devices, and in particular to a PCB solder flux spraying device with a chain protection function, comprising a fixture, a conveying system and a spraying system; the conveying system comprises two parallel and symmetrical chains, and a chain driving device, the chain is enclosed inside a shield, a slit is provided on the surface of the shield, a hanger attached to the chain passes through the slit and is suspended on the outside of the shield, an air inlet pipe is provided outside the shield, and the air inlet pipe is used to input high-pressure gas to form a positive pressure inside the shield, so that the slit always sprays air outward to prevent atomized solder flux from entering the inside of the shield. The embodiment of the present invention uses a shield with a positive pressure inside to protect the chain therein, thereby preventing the atomized solder flux from approaching the chain and avoiding the corrosion of the chain.

Description

Technical Field

[0001] The invention relates to the field of PCB board soldering flux spraying devices, and in particular to a PCB board soldering flux spraying device with a chain protection function. Background Art

[0002] The traditional PCB board flux spraying device uses two side-by-side chain conveyors to transport jigs. The PCB board is fixed in the middle by the jig. The flux spray gun is driven by a reciprocating drive. The flux spray gun is set under the PCB board to spray flux on the PCB board. During the flux spraying process, the atomized flux is easy to adhere to the surface of the chain, causing the chain to rust. Summary of the invention

[0003] The object of the present invention is to provide a PCB board soldering flux spraying device with a chain protection function to solve the problem that during the process of spraying soldering flux on the PCB board, the atomized soldering flux is easily attached to the surface of the chain conveying the PCB board, causing the chain to rust.

[0004] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0005] A PCB solder flux spraying device with a chain protection function comprises a fixture, a conveying system and a spraying system; the fixture is used to fix the PCB, the conveying system is used to convey the fixture to the spraying system, and the spraying system is used to spray solder flux on the PCB fixed by the fixture; the fixture comprises a supporting plate with a window, the PCB is placed at the center of the supporting plate, and the pins of the components of the PCB are exposed below the window; the conveying system comprises two side-by-side and symmetrical chains, and a driving device for the chains, the chains are enclosed inside a shield, a gap is provided on the surface of the shield, a hanger attached to the chain passes through the gap and is suspended outside the shield, an air inlet pipe is provided outside the shield, an air flow channel is provided inside the shield, an air outlet close to the gap is provided in the air flow channel near a flux spray gun, and the air inlet pipe is used to input high-pressure gas to form a positive pressure inside the shield, so that the gap always sprays air flow outward to prevent atomized solder flux from entering the inside of the shield.

[0006] Furthermore, the hanger is Z-shaped, the top of the hanger is connected to the chain, the bottom of the hanger is suspended, and the bottom of the hanger is divided into two horizontally extending protrusions, which are used to hang the bottom of both sides of the fixture of the PCB board.

[0007] Furthermore, soft hair is arranged inside the gap on the surface of the shield, and the soft hair is pushed away when the hanger passes by, and the soft hair covers the gap after the hanger passes by.

[0008] Furthermore, the support plate is also provided with a slide groove extending toward the window, the positioning plate of the PCB board is connected to the slide groove by bolts, the bottom wall of the positioning plate contacts the top surface of the support plate, and the side wall of the positioning plate contacts the side surface of the PCB board.

[0009] Furthermore, it also includes a clamp, which is fixedly connected to the fixture, and the clamp is used to fix the vertical barrier layer, which is a flexible film suspended under the PCB board. The size of the vertical barrier layer is designed according to the diffusion path of the flux sprayed by the spraying system to ensure that the path of the flux diffusing to the conveying system is shielded. The spraying system includes a reciprocating drive and a flux spray gun, and the flux spray gun is driven by the reciprocating drive. The movement direction of the flux spray gun is perpendicular to the movement direction of the fixture. The vertical blocking layers are located on both sides of the movement direction of the flux spray gun; the fixture includes a base, a lower pressure plate and a lower pressure plate, the base is fixedly connected to the fixture, the lower pressure plate and the base are connected by a cylindrical pair so that the lower pressure plate can be lifted and lowered and rotated around a vertical line, the lower pressure plate and the base are connected by a rotating pair so that the lower pressure plate can rotate around a vertical line, the lower pressure plate and the lower pressure plate are used to clamp the vertical blocking layer, and pull the edge of the vertical blocking layer through its own rotation to make the vertical blocking layer tensioned.

[0010] Furthermore, it also includes: a roll film and a clamp actuating robot, wherein an unwinding mechanism and a rewinding mechanism of the roll film are respectively arranged on both sides of the conveying system, the vertical barrier layer is formed on the roll film by a stamping process, the vertical barrier layer is a flexible rectangular sheet, and the vertical barrier layer is connected to the roll film by an easy-to-tear line or an easy-to-break line; the clamp actuating robot is arranged between the unwinding mechanism and the rewinding mechanism, and after the vertical barrier layer moves to the bottom of the PCB board as the roll film is unwinded and rewinded, the clamp actuating robot drives the clamp to sequentially complete the actions of tearing the vertical barrier layer from the roll film, clamping the vertical barrier layer and tensioning the vertical barrier layer.

[0011] Furthermore, a circular through hole vertically passing through the base is provided at the center of the base, a sliding column is inserted into the circular through hole, the lower end of the sliding column is fixedly connected to a lower pressure plate, the lower end of the base is connected to a lower pressure plate, and the lower pressure plate can rotate around the axis of the circular through hole; the lower pressure plate and the lower pressure plate are close to each other so as to clamp the edge of the vertical barrier layer in the middle, and when the lower pressure plate rotates in a direction away from the center of the vertical barrier layer, the lower pressure plate rotates synchronously, and a prestress away from the center of the vertical barrier layer is applied to the edge of the vertical barrier layer, so that the vertical barrier layer is tensioned.

[0012] Furthermore, a guide groove connected to the circular through hole is provided inside the base, and a guide block is provided on the sliding column. The guide block can be slidably arranged inside the guide groove, and the guide groove includes an upper annular groove, a vertical groove, and a lower annular groove connected in sequence from top to bottom. The upper annular groove and the lower annular groove are both arranged around the axis of the circular through hole, and the vertical groove is parallel to the axis of the circular through hole. When the guide block is located inside the upper annular groove, the vertical blocking layer is clamped by the lower pressure plate and the lower pressure plate.

[0013] Furthermore, the clamp actuating manipulator includes an electric push rod, a rotary cylinder and a finger cylinder, the actuator of the finger cylinder is equipped with a clamp, the clamp is used to clamp the sliding column, the rotary cylinder is used to rotate the finger cylinder so that the sliding column rotates around the axis of the circular through hole, thereby completing the action of tensioning the vertical barrier layer, and the electric push rod is used to vertically move the rotary cylinder so that the sliding column moves along the axis of the circular through hole, so that the lower pressure plate and the lower pressure plate of the clamp are close to or away from each other, thereby completing the action of tearing off the vertical barrier layer and clamping the vertical barrier layer.

[0014] Furthermore, the roll film includes two parallel strips, and a plurality of vertical blocking layers are evenly formed between the two strips along the length direction of the roll film. The vertical blocking layer and the strip are connected by an easy-tear line or an easy-break line, and there is an opening between the vertical blocking layer and the strip for the lower pressure plate of the clamp to pass through; the vertical blocking layer moves at a position lower than the PCB board, and when the lower pressure plate is at the lowest point of its own stroke, the lower pressure plate is lower than the vertical blocking layer, and after the vertical blocking layer is torn off, the strip continues to be rolled up by the winding mechanism.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] A PCB solder flux spraying device with a chain protection function is provided. An embodiment of the present invention uses a protective cover with positive internal pressure to protect the chain therein, thereby preventing atomized solder flux from approaching the chain and preventing the chain from being corroded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 A three-dimensional diagram of a conventional PCB solder flux spraying device;

[0019] Figure 2 A three-dimensional diagram of a non-working state of a fixture for a PCB board according to an embodiment of the present invention;

[0020] Figure 3 A three-dimensional diagram of the working state of the fixture of the PCB board according to the embodiment of the present invention;

[0021] Figure 4 A top view of a clamp according to an embodiment of the present invention;

[0022] Figure 5 for Figure 4 Cross-sectional view in the AA direction;

[0023] Figure 6 for Figure 5 A three-dimensional diagram of the invention, in which the sliding column, the upper pressing plate and the lower pressing plate are hidden;

[0024] Figure 7 It is a front view of an embodiment of the present invention;

[0025] Figure 8 is a three-dimensional diagram of an embodiment of the present invention from a top view perspective;

[0026] Fig. 9 A three-dimensional diagram of an embodiment of the present invention from a bottom-up perspective;

[0027] Fig.10 A top view of a state where a roll film according to an embodiment of the present invention is covered on a PCB board;

[0028] Fig.11 A front view of the actuation process of the clamp actuation manipulator according to an embodiment of the present invention;

[0029] Fig.12 It is a three-dimensional diagram of a conveying system according to an embodiment of the present invention, in which the shield is in a transparent state;

[0030] The numbers in the figure represent the following:

[0031] 1-PCB board; 11-vertical blocking layer; 2-fixture; 21-supporting plate; 211-window; 212-slide groove; 22-positioning plate; 23-bolt; 3-clamp; 31-base; 311-circular through hole; 312-guide groove; 313-vertical groove; 314-upper annular groove; 315-lower annular groove; 32-sliding column; 321-guide block; 322-polygonal column; 33-upper pressure plate; 34-upper pressure plate; 3 5-lower pressure plate; 36-lower pressure plate; 4-conveying system; 41-chain; 42-hanger; 43-shield; 44-inlet pipe; 45-air flow channel; 46-air outlet; 47-soft hair; 5-spraying system; 51-reciprocating drive; 52-flux spray gun; 6-film roll; 61-strip; 7-clamp actuating manipulator; 71-first electric push rod; 72-rotating cylinder; 73-finger cylinder; 74-clamp. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to solve the problem that during the process of spraying flux on PCB boards, the atomized flux is easy to adhere to the surface of the chain conveying the PCB boards, causing the chain to rust.

[0034] Combination Figure 7 , Figure 8 , Fig. 9 An embodiment of the present invention provides a PCB board flux spraying device with a chain protection function, which is mainly used for automatically spraying flux on the PCB board 1, including the vertical barrier layer 11, the jig 2, the clamp 3, the conveying system 4 and the spraying system 5.

[0035] Combination Figure 2 , Figure 3 The fixture 2 includes a supporting plate 21 having a window 211, the PCB board 1 is placed at the center of the supporting plate 21, the pins of the components of the PCB board 1 are exposed below the window 211 for spraying flux from bottom to top, the supporting plate 21 is also provided with a slide groove 212 extending toward the window 211, the positioning plate 22 of the PCB board 1 is connected to the slide groove 212 through the bolt 23, the bottom wall of the positioning plate 22 contacts the top surface of the supporting plate 21, and the side wall of the positioning plate 22 contacts the side surface of the PCB board 1.

[0036] The conveying system 4 includes two symmetrical chains 41 arranged side by side, and a driving device of the chain 41. The chain 41 is enclosed inside the shield 43. A gap is provided on the surface of the shield 43. The hanger 42 attached to the chain 41 passes through the gap and is suspended on the outside of the shield 43. The hanger 42 is Z-shaped. The top of the hanger 42 is connected to the chain 41. The bottom of the hanger 42 is horizontal and suspended. Two horizontally extending protrusions are formed on the bottom of the hanger 42, which are used to hang the bottom of both sides of the fixture of the PCB board. The outside of the shield 43 is provided with the An air inlet pipe 44, the protective cover 43 is provided with the air flow channel 45 inside, the air flow channel 45 is provided with the air outlet 46 near the gap near the spray gun of the flux, the air compressor inputs air flow into the air inlet pipe 44, so that a positive pressure is formed inside the protective cover 43, the gap always sprays air flow outward, thereby preventing the atomized flux from entering the inside of the protective cover 43, the inside of the gap is provided with the soft hair 47, the soft hair 47 is pushed away when the hanger 42 passes by, and the soft hair 47 covers the gap after the hanger 42 passes by, thereby reducing the area of ​​the gap that can pass the air flow and increasing the positive pressure inside the protective cover 43.

[0037] The spraying system 5 includes the reciprocating drive 51 and the flux spray gun 52, and the flux spray gun 52 is driven by the reciprocating drive 51. The vertical barrier layer 11 is a flexible plastic film. During the process of spraying flux, the vertical barrier layer 11 is located between the flux spray gun 52 and the chain 41, thereby preventing the flux from diffusing onto the chain 41.

[0038] The clamps 3 are arranged at the four corners of the jig 2, and the clamps 3 are used to clamp the vertical blocking layer 11. The vertical blocking layer 11 is a flexible plastic film. One side of the vertical blocking layer 11 is clamped by two clamps 3, and the other side of the vertical blocking layer 11 naturally hangs on both sides below the PCB board and is located between the PCB board and the chain. The atomized flux is blocked by the vertical blocking layer 11, thereby preventing the flux from diffusing to the chain.

[0039] Combination Figure 4 , Figure 5 , Figure 6The clamp 3 includes a base 31, a circular through hole 311 vertically passing through the base 31 is arranged at the center of the base 31, the sliding column 32 is inserted into the circular through hole 311, the sliding column 32 and the circular through hole 311 form a cylindrical pair, the upper pressure plate 33 and the lower pressure plate 35 are fixedly connected at both ends of the sliding column 32, the upper pressure plate 34 and the lower pressure plate 36 are connected at both ends of the base 31, the upper pressure plate 34 and the lower pressure plate 36 can both rotate around the axis of the circular through hole 311, when the upper pressure plate 33 contacts the upper pressure plate 34, the lower pressure plate 35 moves away from the lower pressure plate 36, and vice versa.

[0040] The lower pressing plate 35 and the lower pressure plate 36 are used to clamp the vertical barrier layer 11 , and the upper pressing plate 33 and the upper pressure plate 34 are used to clamp plastic films for other purposes.

[0041] The upper pressure plate 33 and the lower pressure plate 35 are both in the shape of long strips perpendicular to the sliding column 32, and one end of the upper pressure plate 33 and the lower pressure plate 35 are fixedly connected to the sliding column 32, the upper pressure plate 34 and the lower pressure plate 36 are both in the shape of circular rings surrounding the sliding column 32, and the other ends of the upper pressure plate 33 and the lower pressure plate 35 are respectively aligned with the surfaces of the upper pressure plate 34 and the lower pressure plate 36.

[0042] In order to prevent the sliding column 32 from rotating on its own, there is a certain friction between the sliding column 32 and the base 31, and there is also a certain friction between the base 31 and the upper pressure plate 34. When there is no external force, the sliding column 32 maintains the current height and angle unchanged.

[0043] In order to enable the lower pressure plate 35 and the lower pressure plate 36 to tension the vertical barrier layer 11, the guide groove 312 connected to the circular through hole 311 is arranged inside the base 31, and the guide block 321 is arranged on the sliding column 32. The guide groove 312 includes the upper annular groove 314, the vertical groove 313, and the lower annular groove 315 connected in sequence from top to bottom. The upper annular groove 314 and the lower annular groove 315 are both arranged around the axis of the circular through hole 311, and the vertical groove 313 is parallel to the axis of the circular through hole 311. The guide block 321 is slidably arranged inside the guide groove 312.

[0044] When the slider slides along the vertical groove 313 to the position of the upper annular groove 314, the lower pressure plate 35 and the lower pressure plate 36 clamp the vertical barrier layer 11, and then the sliding column 32 is rotated to make the slider slide inside the upper annular groove 314, so that the corners of the vertical barrier layer 11 clamped by the lower pressure plate 35 and the lower pressure plate 36 are pulled outward, thereby tensioning the vertical barrier layer 11.

[0045] Based on the above embodiments, the present invention uses a flexible plastic film to form the vertical barrier layer 11 that blocks the flux from approaching the chain 41. The vertical barrier layer 11 effectively compensates for the technical problem that the rigid baffle cannot directly contact the PCB board 1 or the fixture 2, and it is difficult to completely seal the gap through which the flux diffuses toward the chain 41. After spraying the flux, there is no need to clean the vertical barrier layer 11, and it can be directly removed and discarded.

[0046] In addition, in order to automatically form the vertical barrier layer 11 on the surface of the PCB board 1 , the embodiment of the present invention further includes a laminating system.

[0047] Combination Fig.10 Before the PCB board 1 arrives at the spraying system 5, an unwinding mechanism and a rewinding mechanism of the roll film 6 are respectively arranged on both sides of the conveying system 4, which are not shown in the figure. The vertical barrier layer 11 is conveyed by the roll film 6, and the roll film 6 includes two parallel strips 61. A plurality of vertical barrier layers 11 are evenly distributed between the two strips 61 along the length direction of the roll film 6. The vertical barrier layer 11 and the strip 61 are connected by an easy-tear line or an easy-break line, and an opening is provided between the vertical barrier layer 11 and the strip 61 for the lower pressing plate 35 of the clamp 3 to pass through. After the vertical barrier layer 11 is torn off, the strip 61 is continuously rewound.

[0048] The clamp actuating robot 7 is arranged between the unwinding mechanism and the rewinding mechanism. After the vertical barrier layer 11 moves to the top of the PCB board 1, the clamp 3 is manipulated by the clamp actuating robot 7 to sequentially complete the actions of tearing the vertical barrier layer 11, clamping the vertical barrier layer 11 and tensioning the vertical barrier layer 11.

[0049] Combination Figure 8 , Fig. 9 , Fig.11The clamp actuating manipulator 7 includes the electric push rod 71, the rotating cylinder 72 and the finger cylinder 73. The actuator of the finger cylinder 73 is equipped with the clamp 74. The clamp 74 is used to clamp the polygonal column 322 on the top of the sliding column 32. The rotating cylinder 72 is used to rotate the finger cylinder 73 so that the sliding column 32 rotates around the axis of the circular through hole 311. The electric push rod 71 is used to vertically move the rotating cylinder 72 so that the sliding column 32 moves along the axis of the circular through hole 311, so that the lower pressure plate 35 and the lower pressure plate 36 of the clamp 3 are close to or away from each other.

[0050] During the process of the lower pressure plate 35 and the lower pressure plate 36 of the clamp 3 approaching each other, the lower pressure plate 35 first contacts the portion of the roll film 6 that has the same shape as the vertical blocking layer 11, and pulls the vertical blocking layer 11 off the roll film 6, so that the four corners of the vertical blocking layer 11 are clamped by the four clamps 3, and then the rotating cylinder 72 drives the sliding column 32 to rotate, so that the lower pressure plate 35 and the lower pressure plate 36 rotate together, and the slider rotates inside the upper annular groove 314, and the two sides of the two vertical blocking layers 11 are respectively pulled in two directions away from the center of the vertical blocking layer 11, so that the vertical blocking layer 11 is tensioned.

[0051] After the PCB board 1 leaves the spraying system 5 , the vertical barrier layer 11 needs to be removed, so a clamp actuating robot 7 is also provided downstream of the conveying system 4 .

[0052] Combination Figure 7 , Figure 8 , Fig. 9 , Fig.11 The second clamp actuating robot 7 is used to execute the opposite working process to the first clamp actuating robot 7, so that the lower pressure plate 35 sequentially completes the process of rotating to release the tension of the vertical barrier layer 11, descending to move away from the vertical barrier layer 11, and rotating to avoid the exit path of the vertical barrier layer 11. After being released by the clamp 3, the vertical barrier layer 11 freely falls to the bottom of the conveying system 4, thereby leaving the production line.

[0053] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A PCB board flux spraying device with chain protection function, characterized in that: It includes a jig (2), a clamp (3), a conveying system (4), a spraying system (5), a film roll (6), and a clamp actuating manipulator (7); The jig (2) is used to fix the PCB board (1), the conveying system (4) is used to convey the jig (2) to the spraying system (5), and the spraying system (5) is used to spray soldering flux onto the PCB board (1) fixed by the jig (2); The jig (2) comprises a support plate (21) having a window (211), the PCB board (1) is placed at the center of the support plate (21), and the pins of the components of the PCB board (1) are exposed below the window (211); The conveying system (4) comprises two symmetrically arranged chains (41) and a driving device for the chains (41); the chains (41) are enclosed inside a shield (43); a slit is provided on the surface of the shield (43); a hanger (42) attached to the chain (41) passes through the slit and is suspended on the outside of the shield (43); an air inlet pipe (44) is provided outside the shield (43); an air flow channel (45) is provided inside the shield (43); an air outlet (46) close to the slit is provided near a soldering flux spray gun; the air inlet pipe (44) is used to input high-pressure gas to form a positive pressure inside the shield (43), so that the slit always sprays air outward to prevent atomized soldering flux from entering the inside of the shield (43); The clamp (3) is fixedly connected to the fixture (2), and the clamp (3) is used to fix a vertical barrier layer (11). The vertical barrier layer (11) is a flexible film suspended below the PCB board (1). The size of the vertical barrier layer (11) is designed according to the diffusion path of the solder flux sprayed by the spraying system (5) to ensure that the path of the solder flux diffusing to the conveying system (4) is shielded. The spraying system (5) comprises a reciprocating drive (51) and a solder flux spray gun (52). The solder flux spray gun (52) is driven by the reciprocating drive (51). The movement direction of the solder flux spray gun (52) is perpendicular to the movement direction of the fixture (2). The vertical barrier layer (11) is located on both sides of the movement direction of the solder flux spray gun (52). The clamp (3) comprises a base (31), a lower pressure plate (35) and a lower pressure plate (36); the base (31) is fixedly connected to the fixture (2); the lower pressure plate (35) and the base (31) are connected via a cylindrical pair so that the lower pressure plate (35) can be lifted and lowered and rotated around a vertical line; the lower pressure plate (36) and the base (31) are connected via a rotating pair so that the lower pressure plate (36) can rotate around a vertical line; the lower pressure plate (35) and the lower pressure plate (36) are used to clamp the vertical barrier layer (11) and pull the edge of the vertical barrier layer (11) through their own rotation so that the vertical barrier layer (11) is tensioned; An unwinding mechanism and a rewinding mechanism for the roll film (6) are respectively arranged on both sides of the conveying system (4); the vertical barrier layer (11) is formed on the roll film (6) by a stamping process; the vertical barrier layer (11) is a flexible rectangular sheet; the vertical barrier layer (11) is connected to the roll film (6) by an easy-tear line or an easy-break line; The clamp actuating manipulator (7) is arranged between the unwinding mechanism and the rewinding mechanism. After the vertical barrier layer (11) moves to the bottom of the PCB board (1) as the roll film (6) is unwinded and rewinded, the clamp actuating manipulator (7) drives the clamp (3) to sequentially complete the actions of tearing the vertical barrier layer (11) from the roll film (6), clamping the vertical barrier layer (11), and tensioning the vertical barrier layer (11).

2. A PCB board solder flux spraying device with chain protection function according to claim 1, characterized in that: The hanger (42) is in a Z shape, the top of the hanger (42) is connected to the chain (41), the bottom of the hanger (42) is suspended in the air, and the bottom of the hanger (42) is divided into two protrusions extending in the horizontal direction, and the protrusions are used to hang the bottom of the two sides of the fixture of the PCB board.

3. A PCB board solder flux spraying device with chain protection function according to claim 1, characterized in that: Soft hair (47) is arranged inside the gap on the surface of the shield (43); when the hanger (42) passes by, the soft hair (47) is pushed away; after the hanger (42) passes by, the soft hair (47) covers the gap.

4. A PCB soldering flux spraying device with chain protection function according to claim 1, characterized in that: The support plate (21) is also provided with a slide groove (212) extending towards the window (211); the positioning plate (22) of the PCB board (1) is connected to the slide groove (212) via a bolt (23); the bottom wall of the positioning plate (22) contacts the top surface of the support plate (21); and the side wall of the positioning plate (22) contacts the side surface of the PCB board (1).

5. The PCB soldering flux spraying device with chain protection function according to claim 1, characterized in that: A circular through hole (311) vertically penetrating the base (31) is provided at the center of the base (31); a sliding column (32) is inserted into the circular through hole (311); a lower pressure plate (35) is fixedly connected to the lower end of the sliding column (32); a lower pressure plate (36) is connected to the lower end of the base (31); and the lower pressure plate (36) is capable of rotating around the axis of the circular through hole (311); The lower pressure plate (35) and the lower pressure plate (36) are close to each other so as to clamp the edge of the vertical barrier layer (11) in the middle. When the lower pressure plate (35) rotates in a direction away from the center of the vertical barrier layer (11), the lower pressure plate (36) rotates synchronously, and a prestress away from the center of the vertical barrier layer (11) is applied to the edge of the vertical barrier layer (11), so that the vertical barrier layer (11) is tensioned.

6. A PCB solder flux spraying device with chain protection function according to claim 5, characterized in that: A guide groove (312) connected to the circular through hole (311) is arranged inside the base (31), and a guide block (321) is arranged on the sliding column (32). The guide block (321) is slidably arranged inside the guide groove (312). The guide groove (312) comprises an upper annular groove (314), a vertical groove (313), and a lower annular groove (315) which are sequentially connected from top to bottom. The upper annular groove (314) and the lower annular groove (315) are both arranged around the axis of the circular through hole (311). The vertical groove (313) is parallel to the axis of the circular through hole (311). When the guide block (321) is located inside the upper annular groove (314), the vertical blocking layer (11) is clamped by the lower pressure plate (35) and the lower pressure plate (36).

7. A PCB board solder flux spraying device with chain protection function according to claim 6, characterized in that: The clamp actuating manipulator (7) comprises an electric push rod (71), a rotary cylinder (72) and a finger cylinder (73); the actuator of the finger cylinder (73) is provided with a clamp (74); the clamp (74) is used to clamp the sliding column (32); the rotary cylinder (72) is used to rotate the finger cylinder (73) to make the sliding column (32) rotate around the axis of the circular through hole (311), thereby completing the action of tensioning the vertical barrier layer (11); the electric push rod (71) is used to vertically move the rotary cylinder (72) to make the sliding column (32) move along the axis of the circular through hole (311), so that the lower pressure plate (35) and the lower pressure plate (36) of the clamp (3) are moved closer to or farther from each other, thereby completing the action of tearing off the vertical barrier layer (11) and clamping the vertical barrier layer (11).

8. The PCB soldering flux spraying device with chain protection function according to claim 1, characterized in that: The roll film (6) comprises two parallel strips (61), a plurality of vertical blocking layers (11) are evenly formed between the two strips (61) along the length direction of the roll film (6), the vertical blocking layer (11) and the strips (61) are connected by easy-tear lines or easy-break lines, and an opening is provided between the vertical blocking layer (11) and the strips (61) for the lower pressing plate (35) of the clamp (3) to pass through; The vertical barrier layer (11) moves to a position lower than the PCB board (1), and when the lower pressing plate (35) is located at the lowest point of its own travel, the lower pressing plate (35) is lower than the vertical barrier layer (11), and after the vertical barrier layer (11) is torn off, the strip (61) continues to be rolled up by the rolling mechanism.

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