An exposure machine

Abstract

The present invention relates to the technical field of PCB board production, and specifically discloses an exposure machine, including an exposure machine body, with feed ports for PCB boards to enter and exit on both left and right sides, the exposure machine body including a bearing system for placing PCB boards, and the exposure machine also including two flip modules disposed on the left and right sides of the exposure machine body and corresponding to the two feed ports one by one, the flip module including a flip frame extending forward and backward along an axis and two conveying roller groups installed on the flip frame. The beneficial effects of the present invention are as follows: each side of the exposure body can be used for loading unexposed PCB boards, loading single-sided exposed PCB boards, and unloading double-sided exposed PCB boards. There is no need to set a transplanting device outside the exposure machine body to transfer single-sided exposed PCB boards, thus saving space. The flipping time, loading and unloading time, especially the loading and unloading time which takes a long time, are used to perform synchronous work, thus saving time and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board production, and in particular to an exposure machine. Background Art

[0002] Exposure machine is an important equipment in semiconductor manufacturing, PCB board production and other processes that require precise pattern transfer. It is mainly used to accurately transfer the pattern on the mask to the photosensitive material. Generally speaking, the exposure machine mainly includes a light source system, a mask, and a carrier system. When in use, the PCB board is placed on the carrier system, and the light emitted by the light source system will pass through the mask to project the pattern onto the photosensitive material of the PCB board.

[0003] In the prior art, it is usually necessary to expose both sides of the PCB board. The conventional method is to set up two exposure machines and set a flip mechanism between the two exposure machines. The PCB board first enters one of the exposure machines for single-side exposure, then enters the flip mechanism to turn over, and then enters the other exposure machine for exposure on the other side. However, the conventional method has some disadvantages, such as the high cost and large floor space of the two exposure machines. Therefore, for PCB boards with the same pattern on both sides, a single-machine double-sided exposure method is currently generally adopted, that is, one exposure machine is used to expose both sides of the PCB board.

[0004] The patent application document with application publication number CN115220310A discloses a fully automatic direct writing exposure system, which includes an exposure device, a first workbench is provided on the left side of the exposure device, a second workbench is provided on the right side, a loading device is provided on the left side of the first workbench, a unloading device is provided on the right side of the second workbench, a flipping device and a transplanting device are provided on the front and rear sides of the exposure device, and the exposure device also includes a grasping device for realizing the transfer of the substrate. When in use, the grasping device on the left side grasps the substrate on the loading device onto the first workbench, the first workbench drives the substrate to move to the bottom of the exposure device and performs first-side exposure, then the first workbench moves in the reverse direction, the grasping device transfers the substrate after single-side exposure to the flipping device for flipping, the flipping device then transfers the substrate to the transplanting device, and the transplanting device drives the substrate to move to the right; the grasping device on the right side transfers the substrate on the transplanting device to the second workbench, the second workbench drives the substrate to move to the bottom of the exposure device and performs second-side exposure, then the second workbench moves in the reverse direction, and the grasping device on the right side transfers the substrate on the second workbench to the unloading device. While the substrate after the first side is exposed is flipped and conveyed to the right, the grabbing device on the left can continue to carry the next substrate to expose the first side. After that, the first workbench and the second workbench alternately enter the exposure device to achieve alternating work and improve work efficiency.

[0005] In the prior art, in order to improve work efficiency, loading and unloading are carried out on both sides of the exposure device, and a turning device and a transplanting device are arranged outside the exposure device to realize the turning and transfer of the base member outside the exposure device. However, this method requires an additional transplanting device to be added outside the exposure device, resulting in a larger footprint of the entire exposure machine. Summary of the invention

[0006] The present invention provides an exposure machine to solve the technical problem in the prior art that a transplanting device is arranged outside the exposure device in order to improve efficiency when performing double-sided exposure on a single machine, thereby occupying a large area.

[0007] An exposure machine of the present invention comprises an exposure machine body, wherein both left and right sides are provided with feeding ports for PCB boards to enter and exit, the exposure machine body comprises a bearing system for placing PCB boards, and the exposure machine further comprises two flip modules which are arranged on both left and right sides of the exposure machine body and correspond to the two feeding ports one by one, the flip module comprises a flip frame whose axis extends forward and backward, two conveying roller groups installed on the flip frame, and a front and rear clamping mechanism for clamping and releasing the PCB board in the front and rear directions, a channel for the PCB board to pass through is formed between the two conveying roller groups, and the two conveying roller groups are used to convey the PCB board in the left and right directions; the two flip modules are used to feed unexposed PCB boards into the exposure machine body and to feed out double-sided exposed PCB boards, and the bearing system comprises a fixed platform, a sliding platform which slides left and right, and a front and rear clamping mechanism arranged on the sliding platform The conveying mechanism is used to convey the PCB board in the left and right directions, the sliding platform is used to alternately receive the PCB boards of the two flip modules, the sliding platform has a middle exposure position and two left and right limit positions, when it is in the limit position, the flip module and the conveying mechanism correspond to transfer the PCB board, the sliding platform has a material receiving stroke of moving to the limit position to receive the unexposed PCB board, and a primary exposure stroke of carrying the unexposed PCB board to the middle exposure position; it also has a flipping movement stroke of carrying the single-sided exposed PCB board to the limit position and conveying the PCB board to the flip module for flipping, and a secondary exposure stroke of carrying the flipped PCB board to the middle exposure position; it also has a feeding stroke of carrying the double-sided exposed PCB board to the limit position to send the PCB board out.

[0008] Beneficial effects: In the present invention, each side of the exposure body can be used for loading unexposed PCB boards, loading single-sided exposed PCB boards, and unloading double-sided exposed PCB boards. When the sliding platform conveys the single-sided exposed PCB board to the flip module, the flip module can turn the PCB board over and wait in place, and the sliding platform carries the conveying mechanism to receive the single-sided exposed PCB board and expose the other side. There is no need to set a transfer device outside the exposure machine body to transfer the single-sided exposed PCB board, which saves space. When one of the flip modules is flipping, loading and unloading, the sliding platform can move to another flip module to receive the PCB board and carry the PCB board for exposure, and use the flipping time, loading and unloading time, especially the loading and unloading time that takes a long time, to perform synchronous work, saving time and improving work efficiency.

[0009] Preferably, the conveying mechanism includes two mounting frames arranged front and back, and the mounting frames are provided with a plurality of conveying wheels arranged left and right in sequence, and the conveying wheels on the two mounting frames are used to clamp the front and back sides of the PCB board and drive the PCB board to move left and right.

[0010] Preferably, the bearing system also includes a left-right positioning mechanism for positioning the PCB board left-right, the left-right positioning mechanism includes two left-right positioning units arranged at intervals on the left and right, each of the left-right positioning units includes a sliding block installed on the bottom of the sliding platform for sliding along the left-right direction and a driving member for driving the sliding block to move left-right, and also includes a clamping member, a torsion spring and a top block. The clamping members of the two positioning units are used for left-right positioning and clamping the PCB board, and the middle position of the clamping member is rotatably installed on the sliding block around an axis extending forward and backward. The clamping member has a vertical state and a horizontal state. The top block is arranged on the fixed platform so that when the sliding platform moves from the middle exposure position to the limit position, the top block pushes the clamping member to rotate to a horizontal state. The torsion spring is arranged between the sliding block and the clamping member to apply an elastic force to the clamping member to place the clamping member in a vertical state.

[0011] The effect is that the clamping member can clamp and center the PCB board in the left and right directions.

[0012] Preferably, the sliding block is provided with an arc-shaped limit groove, and the clamping member is provided with a limit column inserted into the arc-shaped limit groove, and the limit column is used to cooperate with a side groove wall of the arc-shaped limit groove to limit the extreme position of the clamping member when the torsion spring drives the clamping member to swing and keep the clamping member in a vertical state.

[0013] The effect is that the arc-shaped limiting groove can limit the rotation of the clamping member, helping it to switch between the vertical and horizontal states.

[0014] Preferably, the conveying mechanism includes a fixing frame corresponding to each mounting frame, the fixing frame is fixedly mounted on the sliding platform, and an elastic component is provided between the mounting frame and the fixing frame so that the mounting frame is floatingly assembled on the fixing frame along the front-rear direction.

[0015] Preferably, the elastic component includes an outer cylinder mounted on the fixing frame and an inner sliding column mounted on the mounting frame, the inner sliding column penetrates into the outer cylinder, and the elastic component also includes a spring arranged between the inner sliding column and the outer cylinder.

[0016] The effect is that the mounting frame can be positioned centrally with respect to the PCB board in the front-rear direction.

[0017] Preferably, the front and rear clamping mechanism includes a fixed plate fixed on the flip frame, a guide rail provided on the fixed plate and extending forward and backward, two front and rear positioning units slidably assembled on the guide rail, and a driving component driving the two front and rear positioning units to move synchronously relative to each other.

[0018] Preferably, the driving assembly includes a motor and a swing plate mounted on a fixed plate, the middle position of the swing plate is connected to the motor, and the driving assembly also includes a driving connecting rod connecting both ends of the swing plate and each positioning frame.

[0019] Preferably, the front and rear positioning units include a slide slidably mounted on a guide rail, a positioning frame fixed on the slide, the positioning frame includes a positioning rod located between two rows of conveying roller groups and an L-shaped connecting rod connecting the slide and the positioning rod, the L-shaped connecting rod passes through the gap between two adjacent rollers in the same conveying roller group.

[0020] The effect is that the PCB board can be centered in the front-to-back direction on the turning frame, and the PCB board can be clamped during the turning process.

[0021] Preferably, a first cylinder and a sealing plate are provided on the exposure machine body corresponding to each feeding port. The first cylinder is provided on the exposure machine body, and is used to drive the sealing plate to rise and fall to open and close the feeding port.

[0022] The beneficial effects of the present invention are as follows: each side of the exposure body can be used for loading unexposed PCB boards, loading single-sided exposed PCB boards, and unloading double-sided exposed PCB boards. When the sliding platform conveys the single-sided exposed PCB board to the flip module, the flip module can flip the PCB board and wait in place, and the sliding platform carries the conveying mechanism to receive the single-sided exposed PCB board and expose the other side. There is no need to set a transfer device outside the exposure machine body to transfer the single-sided exposed PCB board, which saves space. When one of the flip modules is flipping, loading and unloading, the sliding platform can move to another flip module to receive the PCB board and carry the PCB board for exposure, and the flipping time, loading and unloading time, especially the loading and unloading time that takes a long time, are used for synchronous work, which saves time and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereogram of the present invention.

[0024] Figure 2 It is a cross-sectional view of the present invention.

[0025] Figure 3 It is a schematic diagram of the internal structure of the exposure machine body of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the positioning frame of the present invention.

[0027] Figure 5 It is a schematic diagram of the decomposition of the sliding platform and the top block of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the sliding platform of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the clamping member of the present invention.

[0030] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0031] Reference numerals:

[0032] 10. Exposure machine body; 11. Working chamber; 12. Sealing plate; 13. First cylinder; 14. Slide rail; 15. Electric slider; 16. Top block; 17. Fixed platform; 18. Fixed frame; 20. Bracket; 21. Flip frame; 22. First motor; 23. Conveyor roller; 24. Second motor; 30. Fixed plate; 31. Third motor; 32. Swing plate; 33. Driving connecting rod; 34. Guide rail; 35. Slide; 36. Positioning frame; 361. Positioning rod; 362. Connecting rod; 40. Sliding platform; 41. Moving channel; 42. Cavity; 43. Clamping plate; 44. Rotating column; 45. Sliding block; 46. Driving rod; 47. Second cylinder; 55. Arc-shaped limiting groove; 56. Limiting column; 60. Outer cylinder; 61. Inner sliding column; 62. Mounting frame; 63. Conveyor wheel; 64. Feeding part. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figures 1 to 8 As shown, a specific embodiment of an exposure machine of the present invention includes an exposure machine body 10 and flip modules disposed on the left and right sides of the exposure machine body 10 .

[0035] like Figure 1 , Figure 2 As shown, in this embodiment, the exposure machine body 10 has a working chamber 11 inside, which can expose the PCB board transported into the exposure machine body 10. The left and right side surfaces of the exposure machine body 10 are provided with feeding ports connected to the working chamber 11 to ensure the feeding and discharging of the PCB board. The feeding ports are sealed with sealing plates 12, which slide with the feeding ports, and the exposure machine body 10 is fixedly installed with a first cylinder 13. The telescopic part of the first cylinder 13 is fixedly connected to the upper end surface of the sealing plate 12, so that the first cylinder 13 can drive the sealing plate 12 to rise or fall, so as to open or close the feeding ports on both sides. The exposure machine body 10 includes a bearing system, a light source system, etc. located in the working chamber 11, and the bearing system is used to place the PCB board. The light source system is a prior art and will not be described in detail here.

[0036] The carrying system includes a fixed platform 17, a sliding platform 40, a conveying mechanism disposed on the sliding platform 40, and left and right positioning mechanisms.

[0037] like Figure 3 , Figure 5 and Figure 6As shown, two slide rails 14 are fixedly installed on the upper surface of the fixed platform 17. The two slide rails 14 are arranged at intervals in the front and rear directions. The two slide rails 14 extend in the left and right directions. Electric sliders 15 are slidably installed on the two slide rails 14. The sliding platform 40 is fixedly installed on the upper surface of the electric slider 15, so that the electric slider 15 can drive the sliding platform 40 to reciprocate left and right along the slide rails 14.

[0038] The conveying mechanism is disposed on the sliding platform 40 , and includes a fixing frame 18 , an elastic component mounting frame 62 , and a conveying wheel 63 .

[0039] The fixed frame 18 is fixed on the sliding platform 40. There are two fixed frames 18 and they are arranged at intervals in the front-to-back direction. The elastic component includes an outer cylinder 60, an inner sliding column 61 and a spring. The outer cylinder 60 is horizontally arranged and fixed on the inner side walls opposite to each other of the two fixed frames 18. The inner sliding column 61 is slidably installed in the outer cylinder 60, and the spring is arranged between the inner sliding column 61 and the outer cylinder 60. The mounting frame 62 is fixedly installed on the outer end of the inner sliding column 61. The mounting frame 62 extends in the left-right direction. A plurality of conveying wheels 63 are rotatably installed on the mounting frame 62, and the conveying wheels 63 can be rotated to convey the PCB board to the left and right. At the same time, the mounting frame 62 is elastically telescopically assembled on the fixed frame 18 through the elastic component, and the PCB board can be positioned in the front-to-back center.

[0040] It should be noted that the conveying wheels 63 are driven by a motor, all the conveying wheels 63 are mutually driven and matched, and the rotation direction of the conveying wheels 63 is consistent. The outer wall of the conveying wheel 63 is coated with a flexible material. It can not only convey the PCB board, but also reduce the friction on the side of the PCB board.

[0041] Both ends of each mounting frame 62 are integrally connected with an inclined feed portion 64, and the two opposite feed portions 64 on the front and rear mounting frames 62 are flared. When the PCB board is conveyed onto the sliding platform 40, the front and rear ends of the PCB board will first contact the feed portion 64, so that the feed portion 64 plays a guiding role for the PCB board.

[0042] When the PCB board enters the inner side of the mounting frame 62, the conveying wheel 63 rotates to convey the PCB board. At the same time, a spring is provided between the inner slide column 61 and the outer cylinder 60, so that the mounting frame 62 is movable and can be clamped inward at the same time, thereby realizing the centering positioning and clamping function of the PCB board in the front and rear directions.

[0043] The left and right positioning mechanism includes two left and right positioning units spaced apart from each other. Each left and right positioning unit includes a clamp, a sliding block 45 , a limiting column 56 , a second cylinder 47 and a top block 16 fixed on the fixed platform 17 .

[0044] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, U-shaped moving channels 41 are provided on both sides of the sliding platform 40 , and the moving channels 41 on both sides are symmetrically arranged. Cavities 42 are provided on the front and rear side walls opposite to each other of the moving channels 41 , and the cavity 42 is connected to the moving channels 41 .

[0045] The clamping member includes a clamping plate 43 and a rotating column 44 penetrating the front and rear ends of the clamping plate 43 . The clamping plate 43 and the rotating column 44 are fixed together, and the rotating column 44 is located near the middle of the clamping plate 43 .

[0046] In this embodiment, the clamping plate 43 is a rectangular plate-like structure, and the clamping plate 43 is located inside the moving channel 41. Both ends of the rotating column 44 are rotatably mounted on the sliding block 45 through a torsion spring. The sliding block 45 is a square structure, and there are two sliding blocks 45 arranged front and back. The sliding blocks 45 on the front and back sides are respectively slidably arranged in the cavities 42 on the front and back sides of the moving channel 41. A driving rod 46 is fixedly connected to one of the sliding blocks 45, and the telescopic part of the second cylinder 47 is fixedly connected to the driving rod 46. The second cylinder 47 is fixedly mounted on the lower surface of the sliding platform 40, so that the second cylinder 47 can drive the clamping plate 43 to move in the moving channel 41.

[0047] The sliding block 45 is provided with an arc-shaped limiting groove 55, and the limiting column 56 is fixedly mounted on the clamping plate 43. One end of the limiting column 56 is located in the arc-shaped limiting groove 55, so as to limit the rotation of the clamping plate 43. In other words, the clamping plate 43 can only use the circumference of the arc-shaped limiting groove 55 as a rotation path. Such a configuration can ensure that the clamping plate 43 can only switch between a vertical state and a horizontal state.

[0048] In the non-working state, the two clamping plates 43 are close to one side of the center position of the sliding platform 40. The clamping plate 43 is in a vertical state, because the rotating column 44 and the sliding block 45 are connected by a torsion spring, and the force of the torsion spring is released, so that the clamping plate 43 always has a rotation force. However, at this time, the position of the limit column 56 is just located at the end of the arc-shaped limit groove 55, that is, the limit column 56 is stuck in the arc-shaped limit groove 55, so that the clamping plate 43 always maintains the rotation force, but cannot rotate. Therefore, the ends of the rotating column 44 are installed with the sliding block 45 through the rotation of the torsion spring, which will always remain in a vertical state.

[0049] The top block 16 is installed on the upper surface of the fixed platform 17 and is located on the movement path of the clamping plate 43. When the clamping plate 43 moves to the left and right sides along with the sliding platform 40, when it moves to the position of the top block 16, the lower half of the clamping plate 43 contacts the top block 16, causing the clamping plate 43 to rotate. During the rotation of the clamping plate 43, the torsion spring will accumulate force until the clamping plate 43 rotates to a horizontal state. At this time, the lower surface of the clamping plate 43 fits the upper surface of the top block 16. And the position of the limit column 56 just moves to the other end of the arc-shaped limit groove 55.

[0050] In this embodiment, the upper surface of the clamping plate 43 rotated to a horizontal state is at the same horizontal position as the upper surface of the sliding platform 40. At this time, it is convenient to transport the PCB board to the sliding platform 40.

[0051] The sliding blocks 45 on both sides also move to the end positions of the cavity 42, and at this time, the ends of the clamping plates 43 extend to the outside of the sliding platform 40. In other words, the ends of the clamping plates 43 exceed the edge of the sliding platform 40.

[0052] It should be noted that the PCB board is transported to the sliding platform 40. The end of the PCB board is flush with the end of the sliding platform 40, so the end of the clamping plate 43 still exceeds the end of the PCB board. This arrangement is convenient for pushing the PCB board inward when the clamping plate 43 is rotated to a vertical state.

[0053] When the sliding platform 40 slides from the left and right sides to the middle, the second cylinder 47 retracts. When the clamping plate 43 has not yet left the top block 16, it is restricted by it and the clamping plate 43 remains in a horizontal state and does not rotate. When the clamping plate 43 is separated from the top block 16, the force of the torsion spring begins to be released, thereby driving the clamping plate 43 to start rotating until the clamping plate 43 rotates to a vertical state. At this time, the limiting column 56 will also move to the end position of the arc-shaped limiting groove 55. Restricted by the limiting column 56, the clamping plate 43 can no longer rotate and will remain in a vertical state.

[0054] As the clamping plate 43 rotates to the vertical state, the PCB will also move along the inclined surface of the clamping plate 43 to the middle position of the sliding platform 40 until the clamping plate 43 rotates to the vertical state. At this time, the clamping plates 43 on both sides of the vertical state just clamp the PCB in place.

[0055] Continue to refer Figure 1 , Figure 2 and Figure 3 The flip module includes a bracket 20, a flip frame 21, a conveying roller group, and a front and rear clamping mechanism.

[0056] The bracket 20 is fixedly mounted at positions corresponding to the feeding port on both sides of the exposure machine body 10, and the flip frame 21 is rotatably mounted inside the bracket 20, and the front bracket 20 is equipped with a first motor 22, which can drive the flip frame 21 to rotate, so that when the PCB board is located on the flip frame 21, the PCB board can be turned over. The rotation axis of the flip frame 21 extends forward and backward.

[0057] There are two conveyor roller groups, which are arranged on the inner side of the flip frame 21. The two conveyor roller groups are arranged at intervals to form a channel for the PCB board to be placed. Each conveyor roller group includes a plurality of conveyor rollers 23 arranged at intervals on the left and right. A second motor 24 for driving the conveyor rollers 23 to rotate is installed on the outer side of the bracket 20. The second motor 24 is connected to one of the conveyor rollers 23, and all the conveyor rollers 23 are connected through a transmission structure, so that the second motor 24 can drive all the conveyor rollers 23 to rotate synchronously.

[0058] In this embodiment, the transmission structure includes a synchronous belt and a conveyor belt. Synchronous pulleys are installed on the upper and lower rows of conveyor rollers 23. All conveyor rollers 23 in each row are connected and driven by synchronous belts. Among them, a conveyor roller 23 driven by the second motor 24 is connected to a conveyor roller 23 corresponding to another conveyor roller group through a conveyor belt. Thus, the second motor 24 can drive all conveyor rollers 23 to rotate, that is, the rotation directions of the two conveyor rollers 23 connected by the conveyor belt are consistent, so the rotation directions of the two rows of conveyor rollers 23 are consistent. When the PCB board is placed in the gap between the upper and lower rows of conveyor rollers 23, the PCB board will only contact the lower conveyor roller 23, and it will not contact the upper conveyor roller 23, so the lower conveyor roller 23 can convey the PCB board to the inside of the exposure machine body 10. When the PCB board needs to be turned over, the conveyor roller 23 will turn 360 degrees, and the upper conveyor roller 23 will rotate to the bottom, so even if the upper conveyor roller 23 rotates to the bottom, its rotation direction can still ensure that the PCB board is conveyed to the inside of the exposure machine body 10.

[0059] It should be noted that the upper conveying roller 23 is located at the leftmost roller, and the lower conveying roller 23 is located at the rightmost roller, and the middle of the two rollers are disconnected (such as Figure 3 As shown). That is to say, it is composed of two rollers, and the gap in the middle can ensure that the clamping plate 43 has a certain margin for rotating upward, because when the clamping plate 43 moves outward, its end will exceed the edge line of the outer side of the conveying roller 23. In layman's terms, the end of the clamping plate 43 extends to the edge line of the conveying roller 23. Therefore, in order to avoid the clamping plate 43 from colliding with the conveying roller 23 during the upward rotation process, the gap of the outermost roller can allow the clamping plate 43 to pass through when rotating.

[0060] During actual operation, mechanical arms are provided on both sides of the exposure machine body 10. When loading is required, the mechanical arms will grab the PCB board and place the PCB board between two rows of conveying rollers 23, and the two rows of conveying rollers 23 will convey the PCB board.

[0061] The front and rear clamping mechanism includes a fixed plate 30 , a third motor 31 , a swing plate 32 , a driving connecting rod 33 , a guide rail 34 and two front and rear positioning units. The front and rear positioning units include a slide 35 and a positioning frame 36 .

[0062] like Figure 3 and Figure 4 As shown, the fixed plate 30 is fixedly mounted on the flip frame 21, the third motor 31 is fixedly mounted on the fixed plate 30, the output end of the third motor 31 is fixedly connected to the above-mentioned swing plate 32, and the swing plate 32 is rotatably mounted at the center position of the fixed plate 30. The third motor 31 can drive the swing plate 32 to swing back and forth, and the driving connecting rods 33 are rotatably mounted on both ends of the fixed plate 30, and the guide rails 34 are fixedly mounted on the front and rear sides of the upper surface of the fixed plate 30, and the slides 35 are slidably mounted on the guide rails 34. The other ends of the two driving connecting rods 33 are rotatably connected to the two slides 35 respectively. When the motor drives the swing plate 32 to swing left and right, the driving connecting rods 33 can drive the slides 35 to slide back and forth along the guide rails 34, and the two slides 35 will move towards each other, that is, the two slides 35 will approach or move away from each other.

[0063] The two slides 35 are fixedly mounted with positioning frames 36, which are respectively located at the front and rear edges of the conveying rollers 23. The positioning frames 36 include a positioning rod 361 located between two rows of conveying rollers and an L-shaped connecting rod 362 connecting the slide 35 and the positioning rod 361, and the L-shaped connecting rod 362 passes through the interval between two adjacent conveying rollers 23 in the same conveying roller group.

[0064] Therefore, when the two positioning frames 36 are close to each other, the positioning rods 361 can clamp and center the PCB board between the conveying rollers 23 .

[0065] During the flipping process, the front and rear clamping mechanisms can clamp the PCB board to prevent it from falling.

[0066] In this embodiment, the sliding platform 40 has three positions during the movement process, namely the middle exposure position, the left limit position and the right limit position. When in the middle exposure position, the exposure machine body 10 exposes the PCB board. When in the left limit position and the right limit position, it is close to the flip module and transfers the PCB board between the flip module and the sliding platform 40.

[0067] The use process of the present invention is as follows: taking the sliding platform 40 moving to the left to receive the PCB board as an example, the sliding platform 40 moves from the middle exposure position to the left limit position, and the clamping plate 43 gradually rotates to a horizontal state during the movement. When the sliding platform 40 moves to the left limit position, the flipping module on the left conveys the unexposed PCB board to the conveying mechanism on the sliding platform 40, and the sliding platform 40 drives the unexposed PCB board to move to the middle exposure position, and then the exposure machine body 10 exposes the first side of the PCB board. After the single-side exposure is completed, the sliding platform 40 drives the single-side exposed PCB board to move to the left, and the conveying mechanism conveys the single-side exposed PCB board to the flipping module on the left, and the flipping module flips it; at the same time, the sliding platform 40 moves to the right limit position, receives the unexposed PCB board on the right flipping module, and then moves to the middle exposure position for exposure, and then conveys the single-side exposed PCB board to the flipping module on the right, and the flipping module on the right flips it. At the same time, the sliding platform 40 moves to the left limit position, receives the PCB board that has been exposed on one side and turned over on the left flip module, and then moves to the middle exposure position to expose the second side. After the second side is exposed, the PCB board that has been exposed on both sides moves to the left limit position, and the flip module on the left transports the PCB board that has been exposed on both sides out, thus unloading the material and reloading the material. While the flip module on the left is unloading and reloading the material, the sliding platform 40 moves to the right limit position, drives the PCB board that has been exposed on one side to expose the second side, and then moves to the right limit position to unload the material. This cycle continues.

[0068] That is to say, when the PCB board is being turned over, the PCB board on the other side is quickly sent into the exposure machine body 10 for exposure of the first side, and then when the exposure is completed and it is sent out, the PCB board that has been turned over is quickly sent into the exposure machine body 10 again for secondary exposure, and the process is carried out in sequence to achieve uninterrupted loading and unloading, avoid idle periods of the exposure machine body 10, ensure continuous work on the PCB board, and effectively improve work efficiency.

[0069] In the present invention, when the sliding platform 40 moves from the middle position to the two limit positions to receive the unexposed PCB board, the sliding platform 40 is in the material receiving stroke. When the sliding platform 40 drives the unexposed PCB board to move to the middle exposure position, the sliding platform 40 is in the primary exposure stroke. When the sliding platform 40 drives the single-sided exposed PCB board to move to the two limit positions, the sliding platform 40 is in the conveying and flipping stroke. When the sliding platform 40 drives the flipped and single-sided exposed PCB board to move to the middle exposure position, the sliding platform 40 is in the secondary exposure stroke. When the sliding platform 40 drives the double-sided exposed PCB board to move to the left and right limit positions, the sliding platform 40 is in the feeding stroke.

[0070] In this embodiment, the conveying mechanism on the sliding platform 40 clamps and conveys the PCB board in the front-to-back direction. In other embodiments, the conveying mechanism on the sliding platform 40 includes a plurality of rollers arranged on the sliding platform 40, and the rollers are used to receive the PCB board conveyed by the flip module and convey the PCB board on the sliding platform 40 to the flip module.

[0071] In other embodiments, the front and rear clamping mechanisms may include two front and rear electric cylinders, and the two electric cylinders act synchronously to clamp or release the PCB board.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An exposure machine, comprising an exposure machine body (10), wherein both left and right sides are provided with feeding ports for PCB boards to enter and exit, and the exposure machine body (10) comprises a bearing system for placing PCB boards; characterized in that: The exposure machine further comprises two flip modules which are arranged on the left and right sides of the exposure machine body (10) and correspond to the two feeding ports one by one. The flip modules comprise a flip frame (21) whose axis extends forward and backward, two conveying roller groups mounted on the flip frame (21), and a front and rear clamping mechanism for clamping and releasing the PCB board in the front and rear directions. A channel for the PCB board to pass through is formed between the two conveying roller groups. The two conveying roller groups are used to convey the PCB board in the left and right directions. The two flip modules are used to feed unexposed PCB boards into the exposure machine body (10) and to feed out double-sided exposed PCB boards. The bearing system comprises a fixed platform (17), a sliding platform (40) that slides left and right, and a conveying mechanism disposed on the sliding platform (40), the conveying mechanism being used to convey the PCB board in the left and right directions; The sliding platform (40) is used to alternately receive the PCB boards of the two flip modules, and the sliding platform (40) has a middle exposure position and two left and right limit positions. When in the limit positions, the flip modules and the conveying mechanism correspond to transfer the PCB boards; The sliding platform (40) has a receiving stroke for moving to the limit position to receive an unexposed PCB board, and a primary exposure stroke for carrying the unexposed PCB board to the middle exposure position; it also has a flipping stroke for moving a single-sided exposed PCB board to the limit position and conveying the PCB board to the flip module for flipping, and a secondary exposure stroke for carrying the flipped PCB board to the middle exposure position; it also has a feeding stroke for moving a double-sided exposed PCB board to the limit position to convey the PCB board out; The bearing system further comprises a left-right positioning mechanism for positioning the PCB board left-right, the left-right positioning mechanism comprising two left-right positioning units arranged at intervals left-right, each left-right positioning unit comprising a sliding block (45) mounted on the bottom of the sliding platform (40) for sliding along the left-right direction and a driving member for driving the sliding block (45) to move left-right, and further comprising a clamping member, a torsion spring and a top block (16), the clamping members of the two positioning units being used for positioning and clamping the PCB board left-right; The middle position of the clamping member is rotatably mounted on the sliding block (45) around an axis extending forward and backward. The clamping member has a vertical state and a horizontal state. The top block (16) is arranged on the fixed platform (17) so that when the sliding platform (40) moves from the middle exposure position to the limit position, the top block (16) pushes the clamping member to rotate to the horizontal state. The torsion spring is arranged between the sliding block (45) and the clamping member to apply elastic force to the clamping member so that the clamping member is placed in the vertical state. The front and rear clamping mechanism comprises a fixing plate (30) fixed on the turning frame (21), a guide rail (34) provided on the fixing plate (30) and extending forward and backward, two front and rear positioning units slidably mounted on the guide rail (34), and a driving assembly driving the two front and rear positioning units to move synchronously relative to each other; The driving assembly comprises a motor and a swing plate (32) mounted on a fixed plate (30), the middle position of the swing plate (32) being connected to the motor, and the driving assembly further comprises a driving connecting rod (33) connecting the two ends of the swing plate (32) and each positioning frame (36); The front and rear positioning unit comprises a slide table (35) slidably mounted on a guide rail (34), a positioning frame (36) fixed on the slide table (35), the positioning frame (36) comprising a positioning rod (361) located between two rows of conveying roller groups, and an L-shaped connecting rod (362) connecting the slide table (35) and the positioning rod (361), the L-shaped connecting rod (362) passing through the interval between two adjacent rotating rollers in the same conveying roller group.

2. An exposure machine according to claim 1, characterized in that: The conveying mechanism comprises two mounting frames (62) arranged front and back, and the mounting frames (62) are provided with a plurality of conveying wheels (63) arranged in sequence left and right. The conveying wheels (63) on the two mounting frames (62) are used to clamp the front and back sides of the PCB board and drive the PCB board to move left and right.

3. An exposure machine according to claim 2, characterized in that: The sliding block (45) is provided with an arc-shaped limit groove (55), and the clamping member is provided with a limit column (56) which penetrates into the arc-shaped limit groove (55), and the limit column (56) is used to cooperate with a side groove wall of the arc-shaped limit groove (55) to limit the limit position of the clamping member when the torsion spring drives the clamping member to swing, thereby keeping the clamping member in a vertical state.

4. An exposure machine according to claim 2, characterized in that: The conveying mechanism comprises a fixing frame (18) corresponding to each mounting frame (62), the fixing frame (18) being fixedly mounted on the sliding platform (40), and an elastic component being provided between the mounting frame (62) and the fixing frame (18) so that the mounting frame (62) is floatingly assembled on the fixing frame (18) in a front-rear direction.

5. An exposure machine according to claim 4, characterized in that: The elastic component comprises an outer cylinder (60) mounted on a fixing frame (18) and an inner sliding column (61) mounted on a mounting frame (62), the inner sliding column (61) penetrates into the outer cylinder (60), and the elastic component further comprises a spring arranged between the inner sliding column (61) and the outer cylinder (60).

6. An exposure machine according to any one of claims 1 to 5, characterized in that: The exposure machine body (10) is provided with a first cylinder (13) and a sealing plate (12) corresponding to each feeding port. The first cylinder (13) is provided on the exposure machine body (10), and is used to drive the sealing plate (12) to rise and fall so as to open and close the feeding port.

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