Full-automatic circuit board inner layer circuit double-sided simultaneous laser direct writing exposure machine

Abstract

The invention relates to the technical field of circuit board production, in particular to a full-automatic circuit board inner layer circuit double-face simultaneous laser direct writing exposure machine which comprises a rack, a feeding conveying roller, a gantry table, an XY motion platform, an upper laser lens assembly, a lower laser lens assembly and a discharging conveying roller. The upper surface and the lower surface of the feeding conveying roller are each provided with a dust sticking roller set and an electrostatic dust collector, and a feeding transferring mechanism and a discharging transferring mechanism which are connected with the rack are arranged above the feeding conveying roller and the discharging conveying roller correspondingly. The upper laser lens assembly and the lower laser lens assembly can be used for simultaneously carrying out laser direct writing exposure on the front surface and the back surface of a product, secondary turn-over operation is not needed, transfer imaging of a double-surface circuit pattern is completed at one time, interlayer alignment deviation caused by a traditional single-surface exposure turn-over process is avoided, and the exposure efficiency of the product is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit board manufacturing technology, specifically to a fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards. Background Technology

[0002] Laser direct imaging exposure equipment is a commonly used device for PCB inner layer circuit manufacturing. It uses a digital laser beam to directly image and expose the inner layer substrate coated with photosensitive film, meeting the inner layer production needs of PCBs such as HDI boards, IC carrier boards, and FPCs.

[0003] Currently, when exposing inner layers of PCBs, industry exposure equipment needs to ensure the precise alignment of the exposed patterns on both sides (A-side and B-side). Some non-fully automated exposure equipment requires manual flipping of the product to achieve exposure of both sides, which is inefficient. Therefore, there are also exposure devices that utilize a flipping mechanism for automatic flipping. For example, there is a solution in an automated production system for double-sided LDI exposure of rigid PCBs (publication number CN114313993A). A single-board flipping machine flips the PCB and transfers it to a second transfer machine, which then transfers it to the exposure machine for a second exposure. However, this flipping exposure method, which exposes side A first and then side B, requires secondary flipping and multiple positioning, resulting in low exposure efficiency and limited overlap between the A-side and B-side images (around ±20µm). Summary of the Invention

[0004] The purpose of this invention is to provide a fully automatic double-sided laser direct writing exposure machine for inner layer circuits of circuit boards, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A fully automatic double-sided laser direct writing exposure machine for inner layer circuits of circuit boards includes a frame, a feeding conveyor roller, a gantry, an XY motion platform, an upper laser lens assembly, a lower laser lens assembly, and an output conveyor roller. The machine frame is equipped with an infeed conveyor roller and an outfeed conveyor roller at both ends. A centering mechanism is installed on the lower part of the surface of the infeed conveyor roller to keep the product in the center of the infeed conveyor roller for initial positioning. Dust-adhesive roller groups and electrostatic precipitators are installed on both the upper and lower surfaces of the infeed conveyor roller to achieve simultaneous dust removal and static electricity removal on both sides of the product, thoroughly removing surface dust, copper shavings and electrostatically adsorbed impurities, avoiding pinholes, open circuits and other circuit defects during exposure, and ensuring the yield of inner layer circuits. An infeed transfer mechanism and an outfeed transfer mechanism connected to the machine frame are respectively set above the infeed conveyor roller and the outfeed conveyor roller, which operate fully automatically. The gantry is installed in the middle of the frame and between the infeed conveyor roller and the discharge conveyor roller. Servo automatic lifters and manual lifters are respectively installed on the upper and lower surfaces of the gantry. The servo automatic lifters and manual lifters are respectively equipped with upper laser lens assemblies and lower laser lens assemblies. Each laser lens in the upper and lower laser lens assemblies is concentrically arranged. After the upper and lower laser lenses are concentrically arranged, the laser lenses are adjusted with the help of software algorithms to ensure the overlap during double-sided exposure. This enables simultaneous exposure of the product's double-sided lines at one time. Compared with single-sided flip exposure equipment, the production capacity is improved, while eliminating the alignment error caused by the flipping process and ensuring the alignment accuracy between layers. The XY motion platform is installed on the gantry and located between the upper and lower laser lens assemblies. A lower glass stage frame mechanism is installed on the XY motion platform. A centering locator is installed on the surface edge of the lower glass stage frame mechanism, which can accurately adjust the product position before exposure. The upper glass stage frame mechanism is installed on the lower glass stage frame mechanism through the locator. An electric cylinder lifter is installed between the upper glass stage frame mechanism and the frame. The electric cylinder lifter is automatically detached and connected to the upper glass stage frame mechanism. The upper and lower glass stage frame mechanisms clamp the product, and the product will not shift during movement.

[0006] Furthermore, the top surface inside the frame is equipped with a feeding mechanical suction cup and a discharging mechanical suction cup, which are located above the feeding conveyor roller and the discharging conveyor roller. The suction cup method can avoid scratching the product surface and improve the stability of product transfer, thereby achieving the purpose of automatic product loading and unloading.

[0007] Furthermore, both the infeed conveyor roller and the outfeed conveyor roller are equipped with several cylinder lifting stoppers and photoelectric sensors. The stoppers can accurately control the position of the product to prevent the product from moving or stacking during the conveying process. The photoelectric sensors detect the presence and position of the product in real time, realizing the linkage control of the conveying, transfer and exposure processes, preventing equipment misoperation, and improving the automation and safety of equipment operation.

[0008] Furthermore, the adhesive roller assembly includes two adhesive rollers and one drum. Adhesive paper rolls are fitted onto the surface of the drum. The adhesive paper rolls contact the adhesive rollers and are arranged in a triangular shape. The drum located on the lower surface of the feed conveyor roller is connected to the feed conveyor roller through an adjusting cylinder and a bearing seat. The adhesive paper rolls can transfer contaminants on the adhesive rollers in real time, avoiding secondary contamination of the product by the adhesive rollers and ensuring good cleaning effect.

[0009] Furthermore, the material centering mechanism includes two guide rail modules and a motor pulley module. Two sets of push plates are slidably connected to the guide rail modules, and the two sets of push plates are connected to the motor pulley module for transmission. This results in higher product centering accuracy and faster speed; it is suitable for products of different sizes and specifications, improving the adaptability of the equipment.

[0010] Furthermore, the feeding and transfer mechanism includes a linear slide, on which a lifting platform is installed, and on which a suction cup module is installed. The feeding and transfer mechanism and the discharging and transfer mechanism have the same structure. The suction cup module uses vacuum adsorption to pick up and place products, eliminating the risk of contact damage and ensuring safe and rapid product transfer.

[0011] Furthermore, two shooting servo linear modules are installed on the lower surface of the servo automatic lifter. The shooting servo linear modules are equipped with detection cameras to achieve full-area scanning detection of the product surface; identify product defects, provide a precise alignment benchmark for laser exposure, and also remove products with obvious defects in advance to avoid invalid exposure, thereby improving equipment operating efficiency and product yield.

[0012] Furthermore, an adjustment servo linear module is installed on the upper surface of the XY motion platform. Two industrial cameras are installed on the adjustment servo linear module, which faces the upper laser lens assembly and the lower laser lens assembly respectively, to ensure the concentricity of the upper and lower lenses and the stability of the exposure focal length. At the same time, it can detect the cleanliness of the laser lens surface, provide timely warning of laser lens contamination problems, and avoid unqualified exposure patterns caused by laser lens dirt.

[0013] Furthermore, the electrostatic precipitator includes an ion bar, with mounting brackets rotatably connected to both ends. A suction pipe is connected to the ion bar via a fixing plate. The suction pipe has a positioning frame, into which a dust baffle is inserted. An outer sleeve is connected to the ion bar, and an inner sleeve is rotatably connected via a bearing inside the outer sleeve. A fan blade is installed at the upper end of the inner sleeve, and a bent pipe is inserted inside the inner sleeve. The bent pipe enhances the blowing force and coverage of the ion air, improving the static electricity removal and dust removal effect. The suction pipe and dust baffle can promptly remove blown-off dust, preventing dust from spreading inside the equipment and causing secondary pollution. The ion bar, rotatably connected via the mounting brackets, allows for adjustable blowing angles to adapt to the static electricity removal needs of products of different sizes, improving the flexibility and effectiveness of dust and static electricity removal.

[0014] Furthermore, the lower glass stage frame mechanism consists of a lower frame and a lower glass, and the upper glass stage frame mechanism consists of an upper frame and an upper glass. The lower frame surface edge is provided with grooves, and two pushing cylinders and clamping cylinders are respectively installed inside the two grooves. The pushing cylinder is connected to a pushing frame, which is located on the surface of the lower glass. The lower frame is rotatably connected to two clamping rods, and the clamping cylinder is connected to a push-pull rod. The push-pull rod is driven by the strip hole of the clamping rod, which can push the product to the center position of the lower glass to achieve precise positioning before exposure. The positioner includes a conical column and a positioning hole. The conical column is installed on the lower frame, and the positioning hole is set on the upper frame to achieve precise docking of the upper and lower frames and ensure the parallelism of the upper and lower glass.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The upper laser lens assembly and the lower laser lens assembly can be used to perform laser direct writing exposure on the front and back of the product at the same time. No secondary flipping operation is required. The transfer imaging of double-sided circuit patterns can be completed in one go, avoiding the interlayer alignment deviation caused by the traditional single-sided exposure flipping process and improving the exposure efficiency of the product.

[0016] (2) The electric cylinder lifter and the manual lifter respectively fix the upper laser lens assembly and the lower laser lens assembly precisely to ensure the installation accuracy of the upper laser lens assembly and the lower laser lens assembly. The industrial camera takes pictures of the upper laser lens assembly and the lower laser lens assembly and then performs parameter compensation for each laser lens. The concentricity of the laser lenses is guaranteed, thereby improving the positional accuracy of the front and back graphics of the product.

[0017] (3) Use the dust roller set to perform preliminary double-sided dust removal on the product, and then use the ion air bar to perform electrostatic dust removal on both sides of the product. The dust blown out by the ion air is collected by the suction pipe. After static removal, the product will not attract dust or debris, thus eliminating the influence of dust on the exposure accuracy of the product.

[0018] (4) The push plate is driven by the motor pulley module to center the product from both sides. The product is then moved to the lower glass stage frame mechanism. The push cylinder and clamping cylinder move the product to the center of the lower glass stage frame mechanism. The upper glass stage frame mechanism presses down on the product, which can ensure the positioning accuracy of the product and thus improve the exposure accuracy.

[0019] (5) The feeding mechanical suction cup hand places the product onto the feeding conveyor roller, and the suction cup module of the feeding transfer mechanism places the product onto the lower glass stage frame mechanism. The XY motion platform controls the movement of the product and starts the exposure. After the exposure is completed, the product is transferred with the help of the discharge transfer mechanism and the discharge mechanical suction cup hand, reducing manual intervention and achieving fully automated operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the structure of the feeding conveyor roller and suction cup module of the present invention. Figure 3 This is a schematic diagram of the connection between the push plate and the feed conveyor roller of the present invention; Figure 4 This is a schematic diagram of the photoelectric sensor and the cylinder lifting baffle of the present invention; Figure 5 This is a schematic diagram of the electrostatic precipitator of the present invention; Figure 6 This is a schematic diagram of the connection between the positioning frame and the dust baffle plate of the present invention; Figure 7 This is a schematic diagram of the connection between the outer cap and the inner cap of the present invention; Figure 8 This is a schematic diagram showing the disassembled structure of the fan blade and inner sleeve of the present invention; Figure 9 This is a schematic diagram of the gantry platform of the present invention; Figure 10 This is a schematic diagram showing the positions of the detection camera and the industrial camera in this invention; Figure 11 This is a schematic diagram of the connection between the manual lifting device and the lower laser lens assembly of the present invention; Figure 12 This is a schematic diagram illustrating the product positioning of the present invention.

[0021] In the diagram: 1. Servo automatic lifter; 2. Upper laser lens assembly; 3. Lower laser lens assembly; 4. Electric cylinder lifter; 5. Electromagnet; 6. Upper glass stage frame mechanism; 7. Lower glass stage frame mechanism; 8. XY motion platform; 9. Gantry; 10. Manual lifter; 11. Inspection camera; 12. Shooting servo linear module; 13. Industrial camera; 14. Positioning servo linear module; 15. Product; 16. Feeding mechanical suction cup; 17. Dust-adhesive roller assembly; 18. Feeding conveyor roller; 19. Feeding transfer mechanism; 20. Push plate; 21. Discharge transfer mechanism; 22. Discharge conveyor roller; 23. Output... 24. Material suction cup handle; 25. Frame; 26. Linear slide; 27. Lifting platform; 28. Suction cup module; 29. ​​Electrostatic precipitator; 30. Photoelectric sensor; 31. Cylinder lifting stop; 32. Guide rail module; 33. Motor pulley module; 34. Ionizing air bar; 35. Suction pipe; 36. Mounting bracket; 37. Positioning frame; 38. Dust baffle; 39. Outer sleeve; 40. Inner sleeve; 41. Bend; 42. Fan blade; 43. Bearing; 44. Conical column; 45. Push cylinder; 46. Clamping cylinder; 47. Push frame; 48. Push-pull rod; 49. Clamping rod; 50. Strip hole; 51. Positioning hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Please see Figure 1-12 The present invention provides a technical solution: A fully automatic double-sided laser direct writing exposure machine for inner layer circuits of circuit boards includes a frame 24, a gantry 9, an XY motion platform 8, an upper laser lens assembly 2, and a lower laser lens assembly 3. It can realize the double-sided simultaneous exposure of product 15, automatically complete the loading and unloading of product 15, and improve the exposure efficiency.

[0024] The inner ends of the frame 24 are respectively equipped with an infeed conveyor roller 18 and an outfeed conveyor roller 22, which can automatically transport the product 15. A material centering mechanism is installed on the lower part of the surface of the infeed conveyor roller 18. The material centering mechanism pushes the product 15 from both sides, so that the product 15 stops in the middle of the infeed conveyor roller 18, which facilitates the suction cup module 27 to accurately pick up the product 15. The upper and lower surfaces of the infeed conveyor roller 18 are equipped with a dust-adhesive roller assembly 17 and an electrostatic dust collector 28. The dust-adhesive roller assembly 17 handles larger impurities on the surface of the product 15. The electrostatic precipitator 28 removes tiny impurities from the surface of the product 15 and eliminates static electricity generated by the rolling friction of the dust-adhesive roller group 17, preventing the product 15 from electrostatically adsorbing impurities. The feed conveyor roller 18 and the discharge conveyor roller 22 are respectively provided with a feed transfer mechanism 19 and a discharge transfer mechanism 21 connected to the frame 24. The feed transfer mechanism 19 transfers the product 15 from the feed conveyor roller 18 to the lower glass stage frame mechanism 7, and the discharge transfer mechanism 21 transfers the exposed product 15 to the discharge conveyor roller 22, automatically completing the loading and unloading of the product 15.

[0025] The gantry platform 9 is installed in the middle of the frame 24 and is located between the infeed conveyor roller 18 and the outfeed conveyor roller 22. The upper and lower surfaces of the gantry platform 9 are respectively equipped with a servo automatic lifter 1 and a manual lifter 10. The manual lifter 10 is a screw guide rail module with a handwheel. The servo automatic lifter 1 and the manual lifter 10 are respectively equipped with an upper laser lens assembly 2 and a lower laser lens assembly 3. The servo automatic lifter 1 and the manual lifter 10 control the distance between the upper laser lens assembly 2 and the lower laser lens assembly 3 and the product 15, so as to achieve the optimal focal surface state for products 15 with different plate thicknesses.

[0026] Each laser lens in the upper laser lens assembly 2 and the lower laser lens assembly 3 is concentrically arranged. A servo automatic lifter 1 and a manual lifter 10 serve as physical hardware to ensure that the upper laser lens assembly 2 and the lower laser lens assembly 3 achieve a concentricity of ±10µm. An adjustment servo linear module 14 is mounted on the upper surface of the XY motion platform 8. Two industrial cameras 13 are mounted on the adjustment servo linear module 14, facing the upper laser lens assembly 2 and the lower laser lens assembly 3 respectively. The adjustment servo linear module 14 can move the two industrial cameras 13 to capture images of all the laser lenses, monitor the laser lens spot positions, and use corresponding software algorithms to detect and compensate the parameters of each laser lens, ensuring that the imaging concentricity of the corresponding upper and lower laser lenses is within ±5µm.

[0027] The XY motion platform 8 is installed on the gantry 9 and located between the upper laser lens assembly 2 and the lower laser lens assembly 3. A lower glass stage frame mechanism 7 is installed on the XY motion platform 8. A centering positioner is installed on the surface edge of the lower glass stage frame mechanism 7 to position the product 15 at the center of the lower glass stage frame mechanism 7. The upper glass stage frame mechanism 6 is installed on the lower glass stage frame mechanism 7 through the positioner. The positioner ensures that the upper glass stage frame mechanism 6 and the lower glass stage frame mechanism 7 will not slide relative to each other. An electric cylinder lifter 4 is installed between the upper glass stage frame mechanism 6 and the frame 24. The electric cylinder lifter 4 and the upper glass stage frame mechanism 6 are automatically connected and disconnected. The electric cylinder lifter 4 and the upper glass stage frame mechanism 6 can be automatically connected and disconnected using an electromagnet 5, or it can be achieved through other plug-in rebound components. The XY motion platform 8 transports the product 15 to the upper laser lens assembly 2 and the lower laser lens assembly 3 for exposure.

[0028] In this embodiment, as Figure 1 As shown, the top surface inside the frame 24 is equipped with a feeding mechanical suction cup 16 and a discharging mechanical suction cup 23, which are located above the feeding conveyor roller 18 and the discharging conveyor roller 22. The product 15 is pushed to the equipment inlet by the trolley and placed in the designated position. When the equipment is running normally, the feeding mechanical suction cup 16 picks up the product 15 according to the program path and places it on the feeding conveyor roller 18. After exposure, the product 15 is placed on the discharging conveyor roller 22 by the discharging transfer mechanism 21. The discharging mechanical suction cup 23 takes the product 15 away from the discharging conveyor roller 22.

[0029] In this embodiment, as Figure 2As shown, several cylinder-lifting baffles 30 and photoelectric sensors 29 are installed on both the feed conveyor roller 18 and the discharge conveyor roller 22. The cylinder-lifting baffles 30 can limit the excessive movement of the product 15, keeping the product 15 in a designated position for precise gripping and transfer. The photoelectric sensors 29 can detect whether there is a product 15 at a designated position on the feed conveyor roller 18 and the discharge conveyor roller 22, allowing the equipment to automatically determine whether there is a product 15. Two cylinder-lifting baffles 30 are installed in the middle of the feed conveyor roller 18. The first cylinder-lifting baffle 30 prevents the product 15 from passing through the dust-adhesive roller group 17, and the second cylinder-lifting baffle 30 can prevent the movement of the dust-adhesive product 15, thus arranging the products 15 in order. A fixed baffle is set at the end of the feed conveyor roller 18 to prevent the product 15 from falling off the feed conveyor roller 18. Two cylinder-lifting baffles 30 are installed in the middle of the discharge conveyor roller 22 to achieve orderly discharge of the product 15.

[0030] In this embodiment, as Figure 2 As shown, the adhesive roller assembly 17 includes two adhesive rollers and one drum. Adhesive paper rolls are fitted onto the surface of the drum, and these rolls contact the adhesive rollers in a triangular arrangement. The drum located on the lower surface of the feed conveyor roller 18 is connected to the feed conveyor roller 18 via an adjusting cylinder and a bearing seat. The adjusting cylinder is connected to the feed conveyor roller 18. The two lower adhesive rollers are directly mounted on the feed conveyor roller 18. The adjusting cylinder ensures that the lower drum and adhesive paper rolls contact the adhesive rollers by lifting the bearing seat. The two upper adhesive rollers and one drum are mounted using the bearing seat. The upper drum contacts the two adhesive rollers by its own weight. The adhesive paper rolls remove impurities from the adhesive rollers, ensuring that the adhesive rollers continuously clean the product 15.

[0031] In this embodiment, as Figure 3 and Figure 4 As shown, the material centering mechanism includes two guide rail modules 31 and a motor pulley module 32. Two sets of push plates 20 are slidably connected on the guide rail modules 31. The two sets of push plates 20 pass through the feed conveyor roller 18 and are connected to the motor pulley module 32 for transmission. The guide rail modules 31 and the motor pulley module 32 are installed on the feed conveyor roller 18. The motor pulley module 32 consists of a servo drive motor, a belt, and a pulley. The two sets of push plates 20 are located on different sides of the belt, which can ensure that the two sets of push plates 20 move synchronously in opposite directions.

[0032] In this embodiment, as Figure 2As shown, the feeding and transfer mechanism 19 includes a linear slide 25, a lifting platform 26 is installed on the linear slide 25, and a suction cup module 27 is installed on the lifting platform 26. The feeding and transfer mechanism 19 and the discharging and transfer mechanism 21 have the same structure. The linear slide 25 is installed inside the upper part of the frame 24. In conjunction with the lifting platform 26, the suction cup module 27 can be controlled to move up, down, left, and right, so as to send the product 15 on the feeding conveyor roller 18 to the lower glass frame mechanism 7.

[0033] In this embodiment, as Figure 10 As shown, two shooting servo linear modules 12 are installed on the lower surface of the servo automatic lifter 1. A detection camera 11 is installed on the shooting servo linear module 12. The shooting servo linear module 12 controls the detection camera 11 to move in a high-precision linear motion to shoot the product 15. It can identify exposure defects of the product 15 online and promptly remove defective products 15.

[0034] In this embodiment, as Figure 5 and Figure 6 As shown, the electrostatic precipitator 28 includes an ion bar 33, with mounting brackets 35 rotatably connected to both ends of the ion bar 33. The ion bar 33 is connected to a suction pipe 34 via a fixing plate. Suction pipes 34 can be installed on both sides of the ion bar 33. Together with two dust baffles 37, it prevents dust from drifting freely. The mounting brackets 35 are connected to the feed conveyor roller 18. Rotating the ion bar 33 can change the air outlet direction and allow dust and other impurities to be blown into the suction pipe 34, preventing dust from flying elsewhere and maintaining the cleanliness of the environment. The suction tube 34 has a positioning frame 36, in which a dust baffle 37 is inserted. A handle bolt is screwed onto the positioning frame 36, and the handle bolt is pressed against the dust baffle 37. Loosening the handle bolt can adjust the distance between the dust baffle 37 and the product 15 to prevent dust from scattering freely. The ion blower 33 is connected to an outer sleeve head 38. An inner sleeve head 39 is rotatably connected to the inner sleeve head 38 through a bearing 42. A mounting seat for fixing the bearing 42 is set inside the outer sleeve head 38. The outer sleeve head 38 and the inner sleeve head 39 are horn-shaped, and there is an air outlet gap between the inner sleeve head 39 and the outer sleeve head 38. A fan blade 41 is installed at the upper end of the inner sleeve head 39, and a bent tube 40 is inserted inside the inner sleeve head 39. The air blown out by the ion blower 33 can drive the fan blade 41, the inner sleeve head 39, and the bent tube 40 to rotate, so that the ion air is blown out in a spiral shape, improving the cleaning efficiency, effect, and range of the product 15.

[0035] In this embodiment, as Figure 12As shown, the lower glass stage frame mechanism 7 consists of a lower frame and a lower glass, and the upper glass stage frame mechanism 6 consists of an upper frame and an upper glass. The lower frame has grooves along its surface edge, and two grooves respectively house a pushing cylinder 44 and a clamping cylinder 45. The pushing cylinder 44 is connected to a pushing frame 46, which is located on the lower glass surface. The pushing frame 46 moves along the lower glass, thus pushing the product 15 onto the lower glass surface. The lower frame is rotatably connected to two clamping rods 48, which are L-shaped. The clamping cylinder 45 is connected to a push-pull rod 47, which is connected to the slotted hole 49 of the clamping rod 48. The clamping cylinder 45 controls the rotation of the two clamping rods 48 via the push-pull rod 47, allowing the clamping rods 48 to push the product 15 and achieve its positioning. The positioner includes a cone column 43 and a positioning hole 50. The cone column 43 is installed on the lower frame, and the positioning hole 50 is located on the upper frame. The lifting platform 26 controls the upper glass frame mechanism 6 to move downward. The positioning hole 50 of the upper frame is aligned with the cone column 43 on the lower frame to achieve positioning of the upper and lower frames. When the XY motion platform 8 drives the lower frame to move, the upper frame moves synchronously to stably clamp the product 15.

[0036] Specifically, in use, the trolley that holds the product 15 is pushed to the designated position on the side of the frame 24, within the working range of the feeding mechanical suction cup 16. The feeding mechanical suction cup 16 picks up the product 15 from the trolley and places the product 15 onto the feeding conveyor roller 18.

[0037] The feed conveyor roller 18 drives the product 15 through the upper and lower sets of dust-adhesive rollers 17, initially removing dust and other impurities from the upper and lower surfaces of the product 15. Then, the ion air bar 33 blows out a large number of air masses with positive and negative charges, which can neutralize the charges on the upper and lower surfaces of the product 15 and prevent the product 15 from adsorbing impurities due to static electricity. Some impurities that were not removed by the dust-adhesive rollers 17 are processed again. The suction pipe 34 is connected to a dust collection device, and the blown impurities are collected by the suction pipe 34.

[0038] After cleaning, the product 15 is moved to the end of the feed conveyor roller 18. At this time, the product 15 is between the two push plates 20. The motor pulley module 32 drives the two push plates 20 to push the product 15 from both sides at the same time, so that the product 15 is centered on the feed conveyor roller 18, thus achieving the positioning of the product 15.

[0039] Next, the linear slide 25 drives the suction cup module 27 to move above the product 15 via the lifting platform 26. The lifting platform 26 controls the suction cup module 27 to hold the product 15 and raise the product 15 a certain distance. The linear slide 25 drives the product 15 to move above the lower glass frame mechanism 7 and places the product 15 on the surface of the lower glass frame mechanism 7. The suction cup module 27 then resets.

[0040] The push cylinder 44 drives the push frame 46 to approach and push the product 15, adjusting the position of the product 15 on the lower glass stage frame mechanism 7. Then, the clamping cylinder 45 drives the two clamping rods 48 to approach the product 15 through the push-pull rod 47. The push frame 46, in conjunction with the clamping rods 48, makes the product 15 located at the center of the lower glass stage frame mechanism 7. The electric cylinder lifter 4 drives the upper glass stage frame mechanism 6 to move downward. The positioning hole 50 fits the cone column 43, realizing the positioning of the upper glass stage frame mechanism 6 and the lower glass stage frame mechanism 7. The electromagnet 5 is de-energized, causing the upper glass stage frame mechanism 6 to separate from the electric cylinder lifter 4. The product 15 is clamped and positioned by the upper glass stage frame mechanism 6 and the lower glass stage frame mechanism 7.

[0041] The XY motion platform 8 moves the product 15 to the upper laser lens assembly 2 and the lower laser lens assembly 3 for exposure. The upper laser lens assembly 2 and the lower laser lens assembly 3 complete the double-sided laser direct writing exposure of the product 15. After the exposure is completed, the XY motion platform 8 moves the product 15 to reset. During the reset process, the detection camera 11 captures the product 15 and performs detection. Product 15 returns to its pre-exposure position. The electric cylinder lifter 4 drives the upper glass stage frame mechanism 6 to reset. Then, the linear slide 25, lifting platform 26, and suction cup module 27 of the discharge transfer mechanism 21 transfer product 15 from the lower glass stage frame mechanism 7 to the discharge conveyor roller 22. The discharge conveyor roller 22 transports the exposed product 15 to the gripping range of the discharge mechanical suction cup hand 23. Depending on whether product 15 has passed the exposure, the discharge mechanical suction cup hand 23 places product 15 into different trolleys.

[0042] The feeding, exposure, and unloading of product 15 are fully automated, enabling double-sided exposure of product 15. No manual intervention is required for transfer, positioning, flipping, or other operations. This effectively avoids the risks of positioning deviation, surface scratches, and dust pollution caused by manual operation, and significantly improves the automation level and operational stability of the production line.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards, characterized in that, include: The frame has an infeed conveyor roller and an outfeed conveyor roller installed at both ends inside the frame. A material centering mechanism is installed on the lower part of the surface of the infeed conveyor roller. Dust-adhesive roller sets and electrostatic dust collectors are installed on both the upper and lower surfaces of the infeed conveyor roller. An infeed transfer mechanism and an outfeed transfer mechanism connected to the frame are respectively provided above the infeed conveyor roller and the outfeed conveyor roller. A gantry platform is installed in the middle of the frame and located between the infeed conveyor roller and the discharge conveyor roller. A servo automatic lifter and a manual lifter are respectively installed on the upper and lower surfaces of the gantry platform. An upper laser lens assembly and a lower laser lens assembly are respectively installed on the servo automatic lifter and the manual lifter. Each laser lens of the upper laser lens assembly and the lower laser lens assembly is concentrically arranged. An XY motion platform is installed on a gantry platform and moves between an upper laser lens assembly and a lower laser lens assembly. A lower glass stage frame mechanism is installed on the XY motion platform. A centering locator is installed on the upper edge of the lower glass stage frame mechanism. An upper glass stage frame mechanism is installed on the lower glass stage frame mechanism through the locator. An electric cylinder lifter is installed between the upper glass stage frame mechanism and the frame. The electric cylinder lifter is automatically detached and connected to the upper glass stage frame mechanism.

2. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The machine frame is equipped with a feeding mechanical suction cup and a discharging mechanical suction cup, which are located above the feeding conveyor roller and the discharging conveyor roller, respectively.

3. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: Both the feed conveyor roller and the discharge conveyor roller are equipped with several cylinder lifting stoppers and photoelectric sensors.

4. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The sticky roller assembly includes two sticky rollers and one drum. Sticky paper rolls are fitted onto the surface of the drum. The sticky paper rolls are in contact with the sticky rollers and arranged in a triangular shape. The drum located on the lower surface of the feed conveyor roller is connected to the feed conveyor roller through an adjusting cylinder and a bearing seat.

5. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The material centering mechanism includes two guide rail modules and a motor pulley module. Two sets of push plates are slidably connected to the guide rail modules, and the two sets of push plates are connected to the motor pulley module for transmission.

6. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The feeding and transfer mechanism includes a linear slide, a lifting platform is installed on the linear slide, and a suction cup module is installed on the lifting platform. The feeding and transfer mechanism and the discharging and transfer mechanism have the same structure.

7. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: Two shooting servo linear modules are installed on the lower surface of the servo automatic lifter, and a detection camera is installed on the shooting servo linear module.

8. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The XY motion platform is equipped with a positioning servo linear module, which has two industrial cameras mounted on it. The two industrial cameras face the upper laser lens assembly and the lower laser lens assembly, respectively.

9. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of circuit boards according to claim 1, characterized in that: The electrostatic precipitator includes an ion bar, with mounting brackets rotatably connected to both ends of the ion bar. The ion bar is connected to a suction pipe via a fixing plate. The suction pipe has a positioning frame, and a dust baffle is inserted into the positioning frame. The ion bar is connected to an outer sleeve head, and an inner sleeve head is rotatably connected to the inner sleeve head via a bearing. A fan blade is installed at the upper end of the inner sleeve head, and a bent pipe is inserted into the inner sleeve head.

10. The fully automatic double-sided simultaneous laser direct writing exposure machine for inner layer circuits of a circuit board according to claim 1, characterized in that: The lower glass stage frame mechanism consists of a lower frame and a lower glass, and the upper glass stage frame mechanism consists of an upper frame and an upper glass. The lower frame surface edge is provided with grooves, and a pushing cylinder and a clamping cylinder are respectively installed in the two grooves. The pushing cylinder is connected to a pushing frame, and the pushing frame is located on the surface of the lower glass. The lower frame is rotatably connected to two clamping rods, and the clamping cylinder is connected to a push-pull rod. The push-pull rod is drivenly connected to the strip hole of the clamping rod. The positioner includes a conical column and a positioning hole. The conical column is installed on the lower frame, and the positioning hole is located on the upper frame.

Images