Automatic dry film pressing equipment for PCB (Printed Circuit Board)

Abstract

The invention relates to the technical field of sticking a dry film on a copper plate of a PCB (Printed Circuit Board), in particular to automatic dry film pressing equipment for the PCB. Comprising a storage rack, a hot-pressing roller, a hot-pressing wheel, a driving mechanism, a moving mechanism and the like, the PCB is placed on the storage rack, then the hot-pressing roller is driven by the driving mechanism to move, the hot-pressing roller can attach a dry film to the PCB, the hot-pressing wheel can move in a reciprocating mode through the moving mechanism, and the hot-pressing wheel is driven by the driving mechanism to move. Therefore, the hot pressing wheel can be in contact with and grind a dry film on the PCB. After the PCB is subjected to film pasting through the hot-pressing roller, the hot-pressing wheel can move left and right on a dry film of the PCB in a reciprocating mode, so that the dry film on the PCB is compacted through the hot-pressing wheel, air between the dry film and the PCB is expelled out, and local bubbles of the dry film can be completely expelled out after the dry film is compressed again through the hot-pressing roller and the hot-pressing wheel subsequently. Therefore, the dry film is prevented from wrinkling.

Description

Technical Field

[0001] The invention relates to the technical field of sticking a dry film on a copper plate of a PCB board, and in particular to an automatic dry film pressing device for a PCB board. Background Art

[0002] PCB board, whose Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. PCB board includes a substrate and a copper plate arranged on the top surface of the substrate. After the copper plate on the PCB board is etched, the process requires a layer of dry film to be attached to the top surface of the copper plate to prevent external dust from covering the circuit layer of the copper plate, so as to protect the circuit layer.

[0003] Nowadays, a laminator is usually used when laminating a PCB board. Using a laminator to paste a dry film on the PCB board can improve work efficiency to a certain extent compared with traditional manual lamination. However, when using the existing laminator, a hot pressing roller is used to roll on the entire PCB board to paste the film. Since the hot pressing roller is in line contact with the PCB board during the entire laminating process, bubbles are easily present in the dry film pasted on the PCB board, causing the dry film to wrinkle. Summary of the invention

[0004] In view of this, the present invention provides an automatic dry film pressing device for PCB boards, which can solve the disadvantage that bubbles are easily present in the dry film attached to the PCB boards when the existing laminating machine attaches films to the PCB boards.

[0005] The technical solution of the present invention is: A PCB board automatic dry film pressing device comprises a machine platform, a storage rack, a hot pressing roller, a hot pressing wheel, a pressing mechanism, a driving mechanism, a feeding mechanism and a moving mechanism. The storage rack is connected to the machine platform, the hot pressing roller and the hot pressing wheel are both used to roll the dry film onto the PCB board, the feeding mechanism can be used to load a reel with the dry film wound around it, then the PCB board is placed on the storage rack, the head end of the dry film is pulled to stick to the PCB board, and the hot pressing roller is pressed to the PCB board by the pressing mechanism, and then the hot pressing roller is driven to move by the driving mechanism, so that the hot pressing roller can stick the dry film to the PCB board, and the moving mechanism can make the hot pressing wheel reciprocate so that the hot pressing wheel can contact and roll the dry film on the PCB board, thereby expelling the air between the dry film and the PCB board.

[0006] Furthermore, the pressing mechanism includes a sliding frame, a movable block and an elastic member, the sliding frame is slidably connected to the machine platform, the movable block is slidably connected to the sliding frame, and the hot pressing roller is rotatably connected to the movable block so that the hot pressing roller can move with the movable block, and the two ends of the elastic member are respectively connected to the movable block and the sliding frame so that the elastic member can squeeze the movable block to move through elastic force, thereby allowing the hot pressing roller to press the dry film.

[0007] Furthermore, the driving mechanism includes a servo motor and a threaded rod, the servo motor is connected to the machine platform, the threaded rod is connected to the output shaft of the servo motor, and the sliding frame is threadedly connected to the threaded rod, so that the servo motor can drive the threaded rod to rotate to drive the sliding frame to move, and then drive the movable block and the hot pressing roller to move.

[0008] Furthermore, the feeding mechanism includes a limit block and an elastic member 2, the limit block is slidably connected to the sliding frame, and the limit block is used to limit the roll wound with the dry film, and the two ends of the elastic member 2 are respectively connected to the limit block and the sliding frame, so that the limit block can be reset by the elastic member 2 after moving.

[0009] Furthermore, the moving mechanism includes a rack 1, a connecting shell, a reciprocating screw, a slider and a gear 1, the rack 1 is connected to the machine platform, the connecting shell is connected to the sliding frame, the reciprocating screw is rotatably connected in the connecting shell, the slider is slidably connected in the connecting shell, the slider is threadedly connected to the reciprocating screw, and the hot pressing wheel is rotatably connected to the slider, so that when the reciprocating screw rotates, it can drive the slider and the hot pressing wheel to reciprocate, the gear 1 is connected to the reciprocating screw, and the gear 1 is meshed with the rack 1, so that when the gear 1 moves, it can rotate through the rack 1, thereby driving the reciprocating screw to rotate.

[0010] Furthermore, it also includes a limiting mechanism, which includes an electric push rod, a clamping block, a second rack and a second gear. The electric push rod is connected to the machine platform, and the two clamping blocks are slidably connected to the storage rack. By moving the two clamping blocks to contact the PCB board, the two clamping blocks can limit the PCB board. One of the clamping blocks is connected to the telescopic rod of the electric push rod, so that the electric push rod can drive one of the clamping blocks to move, the second rack is connected to the clamping block, the second gear is rotatably connected to the storage rack, and the second rack is meshed with the second gear, so that when one of the clamping blocks moves, it can cooperate with the second rack and the second gear to drive the other clamping block to move.

[0011] Furthermore, it also includes a fixing mechanism, which includes a hollow tube and a limiting frame. The hollow tube is connected to the machine platform, and the limiting frame is slidably connected to the hollow tube. The limiting frame is moved to contact the PCB board, so that the limiting frame can limit the PCB board.

[0012] Furthermore, the fixing mechanism also includes a connecting rod, a guide rail and an elastic member three, the connecting rod is connected to the sliding frame, the guide rail is connected to the limiting frame, and the limiting frame can be moved by the cooperation of the connecting rod and the guide rail, and the two ends of the elastic member three are respectively connected to the hollow tube and the limiting frame, so that the limiting frame can be reset by the elastic member three after moving.

[0013] Furthermore, a cleaning mechanism is included, which includes a connecting block and a cleaning roller, wherein the connecting block is connected to the sliding frame, and the cleaning roller is rotatably connected to the connecting block, and the cleaning roller contacts the surface of the PCB board when rotating, so that the cleaning roller can clean the surface of the PCB board.

[0014] Furthermore, the cleaning mechanism also includes a rack three and a gear three, the rack three is connected to the machine platform, the gear three is connected to the cleaning roller, and the gear three is meshed with the rack three so that the gear three can rotate through the rack three, thereby driving the cleaning roller to rotate. Beneficial Effects

[0015] 1. After the PCB board is laminated with a film by a hot pressing roller, the hot pressing wheel can move back and forth on the dry film on the PCB board, so that the hot pressing wheel compacts the dry film on the PCB board and drives out the air between the dry film and the PCB board. Subsequently, the hot pressing roller and the hot pressing wheel are pressed again to completely drive out the local bubbles in the dry film, thereby avoiding the wrinkling of the dry film.

[0016] 2. After the PCB board is placed on the storage rack, the clamping blocks on the front and rear sides contact the PCB board, so that the clamping blocks can clamp the PCB board, thereby limiting the position of the PCB board to prevent the PCB board from sliding forward and backward when the film is applied.

[0017] 3. The present invention can make the limit frame contact with the PCB board through the cooperation of the connecting rod and the guide rail, so that the limit frame clamps the PCB board, and then fixes the PCB board to prevent the PCB board from sliding left and right when the film is applied.

[0018] 4. The present invention provides a cleaning roller so that when the rotating cleaning roller contacts the surface of the PCB board, the rotating cleaning roller can clean the surface of the PCB board, thereby facilitating subsequent film application on the surface of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the clamping mechanism, driving mechanism and feeding mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the present invention.

[0023] Figure 5 It is a cross-sectional view of the moving mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the fixing mechanism of the present invention.

[0026] Figure 8 It is a cross-sectional view of the fixing mechanism of the present invention.

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0028] In the accompanying drawings: 1-machine table, 2-storage rack, 3-hot pressing roller, 4-hot pressing wheel, 5-sliding frame, 6-movable block, 7-elastic part one, 8-servo motor, 9-threaded rod, 10-limiting block, 11-elastic part two, 12-rack one, 13-connecting shell, 14-reciprocating screw, 15-slider, 16-gear one, 17-electric push rod, 18-clamping block, 19-rack two, 20-gear two, 21-hollow tube, 22-limiting frame, 23-connecting rod, 24-guide rail, 25-elastic part three, 26-connecting block, 27-cleaning roller, 28-rack three, 29-gear three. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Embodiment: A PCB board automatic dry film pressing device, see Figure 1-Figure 5As shown, the machine 1 comprises a cabinet and a U-shaped plate, wherein the U-shaped plate is connected to the top of the cabinet, and further comprises a rack 2, a hot pressing roller 3, a hot pressing wheel 4, a pressing mechanism, a driving mechanism, a feeding mechanism and a moving mechanism, wherein the rack 2 is connected to the inner bottom of the U-shaped plate of the machine 1, the hot pressing roller 3 and the two hot pressing wheels 4 are used to roll the dry film onto the PCB board, the feeding mechanism can be used to feed the roll wound with the dry film, and then the PCB board is placed on the rack 2, and then the first of the dry film is pulled The hot pressing roller 3 is affixed to the PCB board, and the pressing mechanism is used to press the dry film onto the PCB board. The hot pressing roller 3 is then driven to move by the driving mechanism to attach the dry film to the PCB board, and the hot pressing wheel 4 is moved back and forth left and right by the moving mechanism, so that the hot pressing wheel 4 can contact and roll the dry film on the PCB board, thereby driving out the air between the dry film and the PCB board, and then completely driving out the local bubbles in the dry film, thereby avoiding wrinkles in the dry film.

[0031] See also Figure 3 and Figure 4 As shown, the clamping mechanism includes a sliding frame 5, a movable block 6 and an elastic member 7, the two sliding frames 5 are slidably connected to the U-shaped plate of the machine table 1, the two movable blocks 6 are slidably connected to the two sliding frames 5, and the hot pressing roller 3 is rotatably connected between the two movable blocks 6 so that the hot pressing roller 3 can move with the movable block 6, the two ends of the elastic member 7 are respectively connected to the movable block 6 and the sliding frame 5, and the elastic member 7 is a spring, so that the elastic member 7 can squeeze the movable block 6 to move through the elastic force, so that the hot pressing roller 3 presses the dry film.

[0032] See also Figure 3 As shown, the driving mechanism includes a servo motor 8 and a threaded rod 9, the servo motor 8 is connected to the U-shaped plate of the machine table 1, the threaded rod 9 is connected to the output shaft of the servo motor 8, and the sliding frame 5 is threadedly connected to the threaded rod 9, so that the servo motor 8 can drive the threaded rod 9 to rotate, thereby driving the sliding frame 5 to move forward and backward, and then driving the movable block 6 and the hot pressing roller 3 to move forward and backward, so that the hot pressing roller 3 can stick the dry film to the PCB board.

[0033] See also Figure 3As shown, the feeding mechanism includes a limit block 10 and an elastic member 11. The two limit blocks 10 are respectively slidably connected to the two sliding frames 5, and the roll with the dry film is placed between the two limit blocks 10. Then, by loosening the limit block 10, the limit block 10 can limit the roll with the dry film. The two ends of the elastic member 11 are respectively connected to the limit block 10 and the sliding frame 5, and the elastic member 11 is a spring, so that the limit block 10 can be reset by the elastic member 11 after moving.

[0034] See also Figure 4 and Figure 5 As shown, the moving mechanism includes a rack 12, a connecting shell 13, a reciprocating screw 14, a slider 15 and a gear 16. The two racks 12 are connected to the U-shaped plate of the machine 1. The connecting shell 13 is connected between the two sliding frames 5. The reciprocating screw 14 is rotatably connected in the connecting shell 13, and the thread on the reciprocating screw 14 is divided into left and right sections. The two sliders 15 are slidably connected in the connecting shell 13. The two sliders 15 are respectively connected to the reciprocating screw 14. The threads of the left and right sections are threadedly connected, and the two hot pressing wheels 4 are rotatably connected to the two sliders 15 respectively, so that when the reciprocating screw 14 rotates, it can drive the slider 15 and the hot pressing wheel 4 to move back and forth left and right, and the two gears 16 are respectively connected to the left and right ends of the reciprocating screw 14, and the gear 16 is meshed with the rack 12, so that when the gear 16 moves, it can rotate through the rack 12, thereby driving the reciprocating screw 14 to rotate.

[0035] When in use, the limit block 10 is pushed to move to the side away from each other, the second elastic member 11 is compressed, and then the roll with the dry film is placed between the two limit blocks 10, and then the limit block 10 is released, and the second elastic member 11 returns to its original state, and the second elastic member 11 drives the limit block 10 to move to the side close to each other and reset, so that the limit block 10 clamps the roll with the dry film, so that the limit block 10 limits the roll with the dry film, and then the PCB board is placed on the storage rack 2, and then the head end of the dry film is pulled to stick to the rear end of the top surface of the PCB board, and then the threaded rod 9 is driven to rotate by the servo motor 8, so that the threaded rod 9 drives the sliding rack 5 moves forward, thereby driving the movable block 6, the hot pressing roller 3, the limit block 10, the reel with the dry film wound around it, the connecting shell 13, the reciprocating screw rod 14, the slider 15, the hot pressing wheel 4 and the gear 16 to move forward, so that the reel with the dry film wound around it continuously unwinds the dry film. At the same time, under the action of the rack 12, the gear 16 drives the reciprocating screw rod 14 to rotate, so that the slider 15 and the hot pressing wheel 4 reciprocate left and right. When the hot pressing roller 3 contacts the PCB board, the PCB board squeezes the hot pressing roller 3 and the movable block 6 to move upward, and the elastic member 7 is compressed. At this time, the elastic force of the elastic member 7 Under the action, the elastic member 7 will squeeze the movable block 6 and the hot pressing roller 3, so that the hot pressing roller 3 is close to the PCB board. When the hot pressing roller 3 contacts the dry film on the PCB board, the hot pressing roller 3 will press the dry film on the PCB board, thereby realizing the film lamination of the PCB board. When the hot pressing wheel 4 contacts the dry film on the PCB board, the hot pressing wheel 4 will reciprocate left and right on the dry film on the PCB board, thereby compacting the dry film on the PCB board and driving out the air between the dry film and the PCB board. When the PCB board is completed with the film lamination, it is cut off between the pasted dry film and the wound dry film, and then the thread is driven by the servo motor 8. The rod 9 is reversed, so that the threaded rod 9 drives the sliding frame 5 to move backward and reset, thereby driving the movable block 6, the hot pressing roller 3, the limit block 10, the reel with the dry film, the connecting shell 13, the reciprocating screw rod 14, the slider 15, the hot pressing wheel 4 and the gear 16 to move backward and reset, so that the hot pressing roller 3 and the hot pressing wheel 4 can press the dry film pasted on the PCB board again. When the hot pressing roller 3 is separated from the PCB board with the film pasted, the elastic member 7 returns to its original state, and the elastic member 7 drives the movable block 6 and the hot pressing roller 3 to move downward and reset, and finally the PCB board with the film pasted can be taken out from the storage rack 2.

[0036] See also Figure 4 and Figure 6As shown, it also includes a limiting mechanism, which includes an electric push rod 17, a clamping block 18, a rack 2 19 and a gear 20. The electric push rod 17 is connected to the U-shaped plate of the machine 1. The two clamping blocks 18 are slidably connected to the storage rack 2. The two clamping blocks 18 are moved to contact the PCB board, so that the two clamping blocks 18 can limit the PCB board. The clamping block 18 on the rear side is connected to the telescopic rod of the electric push rod 17, so that the electric push rod 17 can drive the clamping block 18 on the rear side to move. The two racks 19 are respectively connected to the two clamping blocks 18, and the gear 20 is rotatably connected to the storage rack 2, and the rack 2 19 is meshed with the gear 2 20, so that when the clamping block 18 on the rear side moves, it can cooperate with the rack 2 19 and the gear 2 20, thereby driving the clamping block 18 on the front side to move.

[0037] When the PCB board is placed on the storage rack 2, the electric push rod 17 can be used to drive the clamping block 18 and the second rack 19 on the rear side to move forward, thereby driving the second rack 19 and the clamping block 18 on the front side to move backward through the second gear 20, so that the clamping blocks 18 on the front and rear sides contact and clamp the PCB board, thereby limiting the position of the PCB board to prevent the PCB board from sliding forward and backward during film application. When the PCB board with film application needs to be taken out from the storage rack 2, it is only necessary to drive the clamping block 18 and the second rack 19 on the rear side to move backward and reset through the electric push rod 17, thereby driving the second rack 19 and the clamping block 18 on the front side to move forward and reset through the second gear 20, so that the clamping blocks 18 on the front and rear sides are separated from the PCB board and the PCB board is released.

[0038] See also Figure 7 and Figure 8 As shown, it also includes a fixing mechanism, which includes a hollow tube 21, a limiting frame 22, a connecting rod 23, a guide rail 24 and an elastic member 25. The four hollow tubes 21 are symmetrically connected to the U-shaped plate of the machine table 1, and the two limiting frames 22 are symmetrically slidably connected between the two hollow tubes 21. The limiting frames 22 are moved to contact the PCB board, so that the limiting frames 22 can limit the PCB board. The two connecting rods 23 are respectively connected to the two sliding frames 5. The two guide rails 24 are connected to the two limit frames 22, and the connecting rod 23 moves in the limit frame 22. By moving the connecting rod 23, the connecting rod 23 can squeeze the guide rail 24 to move, thereby driving the limit frame 22 to move. The two ends of the elastic member three 25 are respectively connected to the hollow tube 21 and the limit frame 22, and the elastic member three 25 is a spring, so that the limit frame 22 can be reset by the elastic member three 25 after moving.

[0039] When the sliding frame 5 moves forward, the sliding frame 5 will drive the connecting rod 23 to move forward. At this time, the connecting rod 23 will squeeze the guide rail 24 to move toward the side close to each other, thereby driving the limiting frame 22 to move toward the side close to each other, and the elastic member 3 25 is stretched to make the limiting frame 22 contact with the PCB board and clamp the PCB board, thereby fixing the PCB board to prevent the PCB board from sliding left and right during film application. When the sliding frame 5 moves backward and resets, the sliding frame 5 will drive the connecting rod 23 to move backward and reset. When the connecting rod 23 is separated from the guide rail 24, the elastic member 3 25 returns to its original state. The elastic member 3 25 drives the limiting frame 22 and the guide rail 24 to move and reset toward the side away from each other, so that the guide rail 24 is in contact with the connecting rod 23, thereby separating the limiting frame 22 from the PCB board and releasing the PCB board.

[0040] See also Fig. 9 As shown, a cleaning mechanism is also included, which includes a connecting block 26, a cleaning roller 27, a rack three 28 and a gear three 29. The two connecting blocks 26 are respectively connected to the two sliding frames 5. The cleaning roller 27 is rotatably connected between the two connecting blocks 26. When the cleaning roller 27 rotates, it contacts the surface of the PCB board, so that the cleaning roller 27 can clean the surface of the PCB board. The two racks three 28 are connected to the U-shaped plate of the machine 1. The two gears three 29 are respectively connected to the left and right ends of the cleaning roller 27, and the gear three 29 is meshed with the rack three 28, so that the gear three 29 can rotate through the rack three 28, thereby driving the cleaning roller 27 to rotate.

[0041] When the sliding frame 5 moves forward, the sliding frame 5 will drive the connecting block 26, the cleaning roller 27 and the gear three 29 to move forward, so that the cleaning roller 27 contacts with the surface of the PCB board. At the same time, under the action of the rack three 28, the gear three 29 can drive the cleaning roller 27 to rotate, so that the rotating cleaning roller 27 cleans the surface of the PCB board, so as to facilitate the subsequent film pasting on the surface of the PCB board. When the sliding frame 5 moves backward and resets, the sliding frame 5 will drive the connecting block 26, the cleaning roller 27 and the gear three 29 to move backward and reset, so that the cleaning roller 27 is separated from the surface of the PCB board.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A PCB board automatic dry film pressing device, comprising a machine table (1), characterized in that: The invention also comprises a storage rack (2), a hot pressing roller (3), a hot pressing wheel (4), a pressing mechanism, a driving mechanism, a feeding mechanism and a moving mechanism. The storage rack (2) is connected to the machine platform (1). The hot pressing roller (3) and the hot pressing wheel (4) are both used for rolling the dry film onto the PCB. The feeding mechanism can be used for feeding the roll wound with the dry film, then placing the PCB on the storage rack (2), pulling the head end of the dry film to stick to the PCB, and using the pressing mechanism to make the hot pressing roller (3) press the dry film onto the PCB. Then, the hot pressing roller (3) is driven to move by the driving mechanism, so that the hot pressing roller (3) can stick the dry film onto the PCB, and the moving mechanism can make the hot pressing wheel (4) reciprocate so that the hot pressing wheel (4) can contact and roll the dry film on the PCB, thereby expelling the air between the dry film and the PCB.

2. The automatic dry film pressing device for PCB board according to claim 1, characterized in that: The pressing mechanism comprises a sliding frame (5), a movable block (6) and an elastic member (7); the sliding frame (5) is slidably connected to the machine platform (1); the movable block (6) is slidably connected to the sliding frame (5); and the hot pressing roller (3) is rotatably connected to the movable block (6) so that the hot pressing roller (3) can move following the movable block (6); and the two ends of the elastic member (7) are respectively connected to the movable block (6) and the sliding frame (5) so that the elastic member (7) can squeeze the movable block (6) to move by elastic force, thereby causing the hot pressing roller (3) to press the dry film.

3. The automatic dry film pressing device for PCB board according to claim 2, characterized in that: The driving mechanism comprises a servo motor (8) and a threaded rod (9); the servo motor (8) is connected to the machine platform (1); the threaded rod (9) is connected to an output shaft of the servo motor (8); and the sliding frame (5) is threadedly connected to the threaded rod (9), so that the servo motor (8) can drive the threaded rod (9) to rotate, thereby driving the sliding frame (5) to move, and further driving the movable block (6) and the hot pressing roller (3) to move.

4. The automatic dry film pressing device for PCB board according to claim 2, characterized in that: The feeding mechanism comprises a limit block (10) and a second elastic member (11); the limit block (10) is slidably connected to the sliding frame (5), and the limit block (10) is used to limit the roll wound with the dry film; the two ends of the second elastic member (11) are respectively connected to the limit block (10) and the sliding frame (5), so that the limit block (10) can be reset through the second elastic member (11) after moving.

5. The automatic dry film pressing device for PCB board according to claim 2, characterized in that: The moving mechanism comprises a rack (12), a connecting shell (13), a reciprocating screw (14), a slider (15) and a gear (16); the rack (12) is connected to the machine platform (1); the connecting shell (13) is connected to the sliding frame (5); the reciprocating screw (14) is rotatably connected in the connecting shell (13); the slider (15) is slidably connected in the connecting shell (13); the slider (15) and the reciprocating screw (14) are threadedly connected. The hot pressing wheel (4) is rotatably connected to the slider (15), so that when the reciprocating screw (14) rotates, it can drive the slider (15) and the hot pressing wheel (4) to move back and forth. The gear 1 (16) is connected to the reciprocating screw (14), and the gear 1 (16) is meshed with the rack 1 (12), so that when the gear 1 (16) moves, it can rotate through the rack 1 (12), thereby driving the reciprocating screw (14) to rotate.

6. The PCB board automatic dry film pressing device according to claim 1, characterized in that: The machine also includes a limiting mechanism, which includes an electric push rod (17), a clamping block (18), a second rack (19) and a second gear (20). The electric push rod (17) is connected to the machine platform (1), and the two clamping blocks (18) are slidably connected to the storage rack (2). The two clamping blocks (18) are moved to contact the PCB board, so that the two clamping blocks (18) can limit the PCB board. The extension and retraction of one of the clamping blocks (18) and the electric push rod (17) The electric push rod (17) is connected to the clamping block (18) so that the electric push rod (17) can drive one of the clamping blocks (18) to move, the rack (19) is connected to the clamping block (18), the gear (20) is rotatably connected to the storage rack (2), and the rack (19) is meshed with the gear (20) so that when one of the clamping blocks (18) moves, it can cooperate with the rack (19) and the gear (20) to drive the other clamping block (18) to move.

7. The automatic dry film pressing device for PCB board according to claim 2, characterized in that: The device also comprises a fixing mechanism, the fixing mechanism comprising a hollow tube (21) and a limiting frame (22), the hollow tube (21) being connected to the machine platform (1), the limiting frame (22) being slidably connected to the hollow tube (21), and the limiting frame (22) being moved to contact with a PCB board so that the limiting frame (22) can limit the position of the PCB board.

8. The automatic dry film pressing device for PCB board according to claim 7, characterized in that: The fixing mechanism further comprises a connecting rod (23), a guide rail (24) and an elastic member three (25); the connecting rod (23) is connected to the sliding frame (5); the guide rail (24) is connected to the limiting frame (22); the limiting frame (22) can be moved by the cooperation of the connecting rod (23) and the guide rail (24); the two ends of the elastic member three (25) are respectively connected to the hollow tube (21) and the limiting frame (22), so that the limiting frame (22) can be reset by the elastic member three (25) after moving.

9. The automatic dry film pressing device for PCB board according to claim 2, characterized in that: The cleaning device also comprises a cleaning mechanism, the cleaning mechanism comprising a connecting block (26) and a cleaning roller (27), the connecting block (26) being connected to the sliding frame (5), the cleaning roller (27) being rotatably connected to the connecting block (26), and the cleaning roller (27) being in contact with the surface of the PCB board when rotating, so that the cleaning roller (27) can clean the surface of the PCB board.

10. The PCB board automatic dry film pressing device according to claim 9, characterized in that: The cleaning mechanism further comprises a rack three (28) and a gear three (29), wherein the rack three (28) is connected to the machine platform (1), and the gear three (29) is connected to the cleaning roller (27), and the gear three (29) is meshed with the rack three (28), so that the gear three (29) can rotate through the rack three (28), thereby driving the cleaning roller (27) to rotate.

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