Ink supply device for vacuum plugging machine

Abstract

The present invention belongs to the technical field of PCB fabrication, and specifically relates to an ink supply device for a vacuum plugging machine. The device comprises a cabinet housing, which is provided with a vacuum chamber and a power chamber separated from each other. The vacuum chamber is provided with a turntable, an ink barrel for the ink supply side, an ink barrel for the degassing side, an ink squeezing mechanism, and a stirring mechanism. The stirring mechanism is used to stir the ink in the degassing side ink barrel to degas the ink, and the ink squeezing mechanism is used to squeeze the ink in the ink barrel for the ink supply side to supply ink to the plugging machine. The power chamber is provided with a first power mechanism for driving the ink squeezing mechanism to rise and fall, a second power mechanism for driving the stirring mechanism to rotate and rise, and a third power mechanism connected to the turntable to drive the turntable to rotate. Dynamic sealing structures are provided on the walls of the vacuum chamber at positions corresponding to each power mechanism. The present invention supplies ink after degassing in the vacuum chamber, while isolating any potentially leaking lubricating oil outside the vacuum chamber to prevent ink contamination, thereby ensuring the quality of subsequent plugging.

Description

Technical Field

[0001] The invention belongs to the technical field of PCB preparation, and in particular relates to an ink supply device for a vacuum plugging machine. Background Art

[0002] A printed circuit board (PCB) is composed of multiple layers of conductive copper plates and insulating plates. The surface of the circuit board is drilled with multiple through-holes that penetrate both sides of the board, and multiple buried vias that do not penetrate both sides of the board. A lithography process is performed on both sides of the circuit board to connect the circuit patterns of each layer of conductive copper plate through each through-hole and buried via. Subsequently, each through-hole and buried via is filled with insulating ink and baked to complete the insulation treatment of each through-hole and buried via.

[0003] Ink is filled into the corresponding holes by a vacuum plugging machine, forming a reliable insulation layer and ensuring the stability of the circuit board's electrical performance. During actual operation, the vacuum plugging machine needs to be supplied with ink. Chinese patent application number CN219686870U discloses an LCS ink supply system for a vacuum vertical plugging machine, comprising an ink supply machine and a plugging machine. The ink supply machine is fixedly mounted with a support frame, within which an ink tank is disposed. The ink tank is directly placed in the support frame and can be directly removed and replaced after use. A piston disc is disposed above the ink tank in the support frame, and the top of the piston disc is connected to the support frame via a drive rod. A gear box is disposed on the support frame, within which a rotatable threaded sleeve is disposed. The gear box is driven by a motor, and rotation is transmitted through a gear set within the gear box, driving the threaded sleeve to rotate. The drive rod is a screw structure that extends upward through the threaded sleeve and is threadedly connected to it. When the motor rotates, the drive rod moves up and down, thereby moving the piston disc up and down along the axis of the ink tank within the support frame, thereby supplying ink to the vacuum plugging machine. On the one hand, when the ink in the ink tank is replenished after it is used up, bubbles are easily mixed in the ink. When bubbles are mixed in the ink, the effective amount of ink actually filled in the PCB hole will be insufficient, forming voids or depressions, which will affect the electrical performance of the PCB; on the other hand, the power system of the ink supply machine drives the gear set and threaded sleeve wheel in the gear box through the motor, and drives the drive rod to raise and lower the piston disk. The gear set in the gear box needs lubrication to maintain operation. If the seal is aged or the installation accuracy is insufficient, the lubricating grease may drip along the gap between the drive rod and the aluminum sleeve, directly contact the piston disk or the top opening of the ink tank, contaminate the ink, and thus affect the quality of the plugging. Summary of the Invention

[0004] The object of the present invention is to provide an ink supply device for a vacuum plugging machine to solve the technical problem in the prior art that the ink supply device for the plugging machine is difficult to ensure the plugging quality.

[0005] To solve the above problems, the present invention provides an ink supply device for a vacuum plugging machine adopting the following technical solutions:

[0006] An ink supply device for a vacuum plugging machine includes a cabinet having a vacuum chamber and a power chamber separated from each other, the vacuum chamber being provided with a turntable, an ink barrel on the ink supply side and an ink barrel on the degassing side mounted on the turntable, an ink squeezing mechanism for extending into the ink barrel on the ink supply side, and a stirring mechanism for extending into the ink barrel on the degassing side; the stirring mechanism is used to stir the ink in the ink barrel on the degassing side to degas the ink, and the ink squeezing mechanism is used to squeeze the ink in the ink barrel on the ink supply side to supply ink to the plugging machine;

[0007] The power chamber is provided with a first power mechanism that is transmission-connected with the ink squeezing mechanism to drive the ink squeezing mechanism to rise and fall, a second power mechanism that is transmission-connected with the stirring mechanism to drive the stirring mechanism to rotate and rise, and a third power mechanism that is transmission-connected with the turntable to drive the turntable to rotate.

[0008] Dynamic sealing structures are provided on the wall of the vacuum chamber at positions corresponding to the various power mechanisms.

[0009] Beneficial effects: After the power chamber is separated from the vacuum chamber, the first power mechanism, the second power mechanism and the third power mechanism in the power chamber are separated from the stirring mechanism and the ink squeezing mechanism in the vacuum chamber, thereby preventing the lubricating oil from leaking into the vacuum chamber. Even if oil leakage occurs, the lubricating oil is only in the power chamber due to the action of the dynamic sealing structures at various locations, and it is difficult for it to enter the vacuum chamber. Accordingly, the ink is prevented from being contaminated, and the quality of subsequent plugging is guaranteed. In addition, after the ink barrel on the ink supply side and the ink barrel on the degassing side are set in the vacuum chamber, the degassing operation of the ink can be carried out in a vacuum environment in the cabinet, thereby avoiding the occurrence of voids or depressions when the subsequent plugging is filled. The ink barrel on the ink supply side supplies ink while the ink barrel on the degassing side performs degassing. After the ink in the ink barrel on the ink supply side is used up, the degassing side ink barrel can be rotated to the ink supply side by rotating the turntable for ink supply, thereby achieving continuity of ink supply and improving production efficiency.

[0010] Furthermore, there are two power chambers, which are located on the upper and lower sides of the vacuum chamber respectively; the first power mechanism and the second power mechanism are located in the upper power chamber, and the third power mechanism is located in the lower power chamber.

[0011] Beneficial effects: The space layout in the entire cabinet is more compact and reasonable. This layout is convenient for the installation, maintenance and transmission of various power mechanisms, reduces mutual interference, and improves the stability of equipment operation and sealing reliability.

[0012] Furthermore, a horizontal mounting plate is provided in the power chamber located on the upper side, and the first power mechanism includes a lifting drive motor, a lifting screw, a drive nut, a first guide rod, an upper guide plate and a lower fixed plate. The lifting drive motor is fixed on the horizontal mounting plate, and the output end of the lifting drive motor is connected to the drive nut, and the lifting screw is threadedly connected to the drive nut. The upper guide plate and the lower fixed plate are respectively connected to the upper and lower ends of the lifting screw, and the first guide rod is connected to the lower fixed plate and slides with the horizontal mounting plate in the upper and lower directions; the ink extrusion mechanism includes an ink extrusion piston and a piston rod, the piston rod is relatively fixed to the lower fixed plate, and the piston rod is sealed with the corresponding dynamic sealing structure.

[0013] Beneficial Effects: The screw drive boasts high precision. The lift drive motor drives the ink squeeze mechanism up and down via the screw, precisely controlling the stroke of the squeeze piston and, therefore, the ink supply, avoiding filling issues caused by insufficient or excessive ink supply. The piston rod and dynamic seal further prevent grease in the power chamber from entering the vacuum chamber through the gap between the piston rod and the chamber wall, contaminating the ink.

[0014] Furthermore, the second power mechanism includes a lifting cylinder, a stirring motor, an upper fixed plate, and a second guide rod. The lifting cylinder is fixed on the horizontal mounting plate, and the output end of the lifting cylinder is connected to the upper fixed plate. The upper fixed plate is located below the horizontal mounting plate. The second guide rod is connected to the upper fixed plate and slides with the horizontal mounting plate in the up and down directions; the stirring mechanism includes a stirring shaft and a stirring blade installed on the stirring shaft. The stirring motor is fixed on the upper fixed plate. A stirring connecting rod is transmission-connected between the output end of the stirring motor and the stirring shaft, and the stirring connecting rod is sealed with the corresponding dynamic sealing structure.

[0015] Beneficial Effects: A lifting cylinder drives the stirring mechanism up and down, allowing the stirring shaft to enter or exit the degassing ink barrel. Combined with the stirring motor, the stirring blade rotates, allowing the stirring mechanism to rotate and stir at different heights, improving degassing efficiency and effectiveness, and more thoroughly removing bubbles from the ink. The stirring rod and dynamic seal structure prevent grease from the power chamber from contaminating the ink through the gap between the stirring rod and the cavity wall.

[0016] Furthermore, the third power mechanism includes a rotary cylinder and a rotary shaft connected to the output end of the rotary cylinder. The rotary shaft is sealed with a corresponding dynamic sealing structure, and the rotary shaft is coaxially fixed with the turntable.

[0017] Beneficial effect: The rotating cylinder drives the rotating shaft to drive the turntable to rotate, which can quickly switch the positions of the ink barrel on the ink supply side and the ink barrel on the degassing side, realize the continuous degassing and ink supply process, and improve the ink supply efficiency.

[0018] Furthermore, a limit buffer mechanism is provided in the power chamber located on the lower side. The limit buffer mechanism includes a swing arm, a sensor and a buffer. The swing arm is vertically connected to the rotating shaft. Two sensors are provided and arranged on both sides of the radial direction of the rotating shaft to detect the position of the swing arm; two buffers are arranged in parallel and spaced apart to cooperate with the swing arm to stop.

[0019] Beneficial effects: The sensor detects the position of the swing arm and can accurately control the rotation angle of the turntable, so that the ink barrels on the ink supply side and the ink barrels on the degassing side accurately reach the working position, ensuring the reliability of the degassing and ink supply process; the buffer cooperates with the swing arm stop to cushion when the turntable reaches the position, reducing mechanical impact, avoiding ink barrel displacement or equipment damage, and improving the stability and reliability of equipment operation.

[0020] Furthermore, the ink barrel on the ink supply side and the ink barrel on the degassing side have the same structure, both including a barrel body and a plurality of spaced-apart ridges located at the circumferential edge of the bottom of the barrel body; a limit card seat is provided on the turntable for cooperating with the corresponding ridges in the up and down directions; a card seat avoidance groove for avoiding the limit card seat is formed between any two adjacent ridges, and a ridge avoidance groove for avoiding the ridge is formed between any two adjacent limit card seats; an anti-rotation interlocking block is provided on the turntable at a position between the ink barrel on the ink supply side and the ink barrel on the degassing side for stopping the ink barrel on the ink supply side and the ink barrel on the degassing side in the circumferential direction of the turntable.

[0021] Beneficial effects: When the structures of the ink barrel on the ink supply side and the ink barrel on the degassing side are the same, unified measurement is convenient, and replacement and maintenance are also convenient; the convex edge at the bottom of the ink barrel cooperates with the limit card seat on the turntable in the up and down directions to prevent the ink barrel from shaking up and down during the ink squeezing or stirring process; the avoidance groove between adjacent convex edges and limit card seats facilitates the installation and removal of the ink barrel; the anti-rotation interlocking block blocks the ink barrel in the circumferential direction of the turntable to prevent the ink barrel from circumferential shifting when the turntable rotates, ensuring that the ink barrel is firmly installed and the ink squeezing and stirring operations are stable.

[0022] Furthermore, a vacuum breaking structure is provided on the cavity wall of the vacuum chamber facing the first power mechanism and the second power mechanism.

[0023] Beneficial effect: The vacuum breaking structure can destroy the vacuum state of the vacuum chamber when the ink barrel needs to be replaced or replenished with ink, so as to balance the internal and external air pressure for easy operation. At the same time, it maintains the vacuum state during normal operation to ensure the degassing effect.

[0024] Furthermore, the three dynamic sealing structures all include a sealing seat, a sealing ring, a sealing sleeve and a sealing pressure ring. At least two sealing rings are arranged at intervals in the up and down directions. The sealing rings are sleeved on the corresponding piston rod, stirring connecting rod or rotating shaft. The sealing sleeve is pressed under the corresponding sealing ring. The sealing pressure ring is connected to the bottom of the sealing seat and presses the sealing sleeve at the bottom.

[0025] Beneficial Effects: Multiple sealing rings, combined with a sealing sleeve and sealing ring, form a multi-stage seal, significantly improving sealing performance. This effectively prevents lubricating grease from the power chamber from leaking into the vacuum chamber through the gap between the piston rod, stirring connecting rod, or rotating shaft and the chamber wall, thus resolving the issue of ink contamination. The sealing sleeve and sealing ring ensure a tight installation of the sealing rings, preventing them from loosening over long-term use, thereby enhancing the reliability and service life of the dynamic seal structure.

[0026] Furthermore, a hollow vacuum box is installed in the cabinet, and box doors are installed outside the cabinet at the openings on both sides of the vacuum box. The box doors are provided with observation windows. When closed, the box doors and the space inside the vacuum box form the vacuum chamber.

[0027] Benefits: The vacuum chamber facilitates the creation of a stable vacuum environment, meeting the vacuum conditions required for ink degassing. The observation window allows the operator to observe the degassing and ink supply conditions within the vacuum chamber without opening the chamber door, facilitating timely detection of problems (such as ink volume, degassing effectiveness, etc.), avoiding frequent opening of the chamber door that could disrupt the vacuum state, and ensuring effective degassing and convenient operation.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention places the power mechanism outside the vacuum chamber and configures a dynamic sealing structure to isolate the lubricating grease that may leak outside the vacuum chamber, thereby preventing the ink in the vacuum chamber from being contaminated.

[0030] 2. The present invention integrates ink supply and degassing in a vacuum chamber with a compact structure; degassing is performed while ink is supplied, and after the ink in the ink barrel on the ink supply side is used up, the degassing ink barrel on the ink supply side that has been degassed is rotated to the ink supply side for use, thereby performing continuous operation and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of an ink supply device for a vacuum plugging machine according to the present invention;

[0032] Figure 2 for Figure 1 A top view of

[0033] Figure 3 for Figure 2 AA cross-sectional view;

[0034] Figure 4 is a schematic diagram of the first dynamic sealing structure;

[0035] Figure 5 is a schematic diagram of the second dynamic sealing structure;

[0036] Figure 6 This is a schematic diagram of the third dynamic secret structure;

[0037] Figure 7 This is a schematic diagram of the installation of the ink barrel on the ink supply side and the ink barrel on the degassing side on the turntable;

[0038] Figure 8 Schematic diagram of the structure of the limit buffer mechanism in the second power chamber;

[0039] Figure 9 This is a structural diagram of the guide box.

[0040] Description of reference numerals:

[0041] 1. Cabinet; 2. First power chamber; 3. Second power chamber; 4. Vacuum box; 5. Box door; 6. Observation window; 7. Vacuum chamber; 8. Horizontal mounting plate; 9. Lifting drive motor; 10. Lifting screw; 11. Drive nut; 12. First guide rod; 13. Upper guide plate; 14. Lower fixed plate; 15. Ink squeezing piston; 16. Piston rod; 17. Lifting cylinder; 18. Stirring motor; 19. Upper fixed plate; 20. Second guide rod; 21. Stirring shaft; 22. Stirring blade; 23. Stirring connecting rod; 24. Ink barrel on the ink supply side; 25. Ink barrel on the degassing side; 26. Turntable; 27. Rotating cylinder; 28. Buffer; 29. ​​Rotating shaft; 30. Sensor; 31. Swing arm; 32. Convex edge; 33. Limiting seat; 34. Anti-rotation interlocking block; 36. Vacuum breaking structure; 361. Guide box; 362. Filter; 363. Guide hole; 37. First dynamic sealing structure; 371. First sealing ring; 372. First sealing seat; 373. First sealing sleeve; 374. First sealing block; 375. First linear bearing; 376. C-type retaining ring for hole; 38. Second dynamic sealing structure; 381. Second sealing ring; 382. Second sealing seat; 383. Second sealing sleeve; 384. Second sealing block; 385. Oil-free bushing; 386. Bushing pressure ring; 39. Third dynamic sealing structure; 391. Third sealing ring; 392. Third sealing seat; 393. Third sealing sleeve; 394. Third sealing block; 395. Second angular contact ball bearing. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0043] An embodiment of an ink supply device for a vacuum plugging machine provided by the present invention:

[0044] like Figure 1 and Figure 3As shown, an ink supply device for a vacuum plugging machine includes a cabinet 1, a vacuum box 4 arranged in the cabinet 1, a turntable 26 arranged in the vacuum box 4 and an ink barrel 24 on the ink supply side and an ink barrel 25 on the degassing side, a stirring mechanism and an ink squeezing mechanism arranged in the vacuum box 4, a first power mechanism, a second power mechanism and a third power mechanism arranged between the vacuum box 4 and the cabinet 1, and a first dynamic sealing structure 37, a second dynamic sealing structure 38, and a third dynamic sealing structure 39 arranged on the corresponding box walls of the vacuum box 4.

[0045] The vacuum box 4 is a hollow structure. Figure 2 As shown, box doors 5 are installed on the openings on both sides of the vacuum box 4 outside the cabinet 1. Transparent observation windows 6 are provided on the box doors 5. When the box doors 5 are closed, they form a vacuum chamber 7 with the space inside the vacuum box 4. When the box doors 5 are opened, ink can be added to the corresponding ink barrel, and the vacuum box 4 can also be cleaned and maintained.

[0046] like Figure 3 As shown, the cabinet 1 forms a first power chamber 2 and a second power chamber 3 in the upper and lower spaces of the vacuum box 4, respectively. The first and second power mechanisms are located in the first power chamber 2, and the third power mechanism is located in the second power chamber 3. The first power mechanism is connected to the ink squeezing mechanism to drive the ink squeezing mechanism to rise and fall. During the descent, the ink squeezing mechanism can extend into the ink barrel 24 on the ink supply side to squeeze the ink to supply ink to the plugging machine; during the ascent, the ink squeezing mechanism can extend from the ink barrel 24 on the ink supply side. The second power mechanism is connected to the stirring mechanism to drive the stirring mechanism to rotate and rise. During the descent, the stirring mechanism can extend into the ink barrel 25 on the degassing side. When rotating, it can stir the ink in the degassing ink barrel 25 to perform a degassing process. During the ascent, the stirring mechanism can extend from the degassing ink barrel 25.

[0047] Specifically, in this embodiment, Figure 3As shown, a horizontal mounting plate 8 is provided in the first power chamber 2. The first power mechanism includes a lifting drive motor 9, a lifting screw 10, a drive nut 11, a first guide rod 12, an upper guide plate 13 and a lower fixed plate 14. The lifting drive motor 9 is fixed on the horizontal mounting plate 8, and the output end of the lifting drive motor 9 is connected to the drive nut 11 for driving the drive nut 11 to rotate; the lifting screw 10 is threadedly connected to the drive nut 11. The upper guide plate 13 and the lower fixed plate 14 are parallel and are respectively connected to the upper and lower ends of the lifting screw 10. The first guide rod 12 is connected to the lower fixed plate 14 and slides with the horizontal mounting plate 8 in the upper and lower directions. The ink squeezing mechanism includes an ink squeezing piston 15 and a piston rod 16. The piston rod 16 is relatively fixed to the lower fixed plate 14. When the lifting drive motor 9 rotates forward, it drives the drive nut 11 to rotate, thereby lowering the lifting screw 10, and then driving the piston rod 16 to lower and perform the ink extrusion operation; when the lifting drive motor 9 rotates reversely, it drives the drive nut 11 to rotate in the opposite direction, thereby raising the lifting screw 10, and then driving the piston rod 16 to rise until the ink squeezing piston 15 leaves the ink barrel 24 on the ink supply side.

[0048] The first dynamic sealing structure 37 is arranged on the upper side wall of the vacuum box 4. Figure 4 As shown, it includes a first sealing seat 372, a first sealing ring 371, a first sealing sleeve 373, a first sealing block 374, a first linear bearing 375, and a C-type retaining ring 376 for the hole. The first sealing seat 372 is fixed to the upper wall of the vacuum box 4 by screws; the first linear bearing 375 is coaxially arranged in the first sealing seat 372, and the C-type retaining ring 376 for the hole is located above the first linear bearing 375 to block the first linear bearing 375. The first sealing ring 371 is located below the first linear bearing 375, with two spaced apart in the vertical direction; two first sealing sleeves 373 are provided, each located below the corresponding first sealing ring 371; the first sealing block 374 is connected to the bottom of the first sealing seat 372 and pressed against the bottom of the first sealing sleeve 373. The piston rod 16 is sealed during the lifting process through the above-mentioned first dynamic sealing structure 37.

[0049] The second power mechanism includes a lifting cylinder 17, a stirring motor 18, an upper fixed plate 19, and a second guide rod 20. Among them, the lifting cylinder 17 is fixed on the horizontal mounting plate 8, and the output end of the lifting cylinder 17 is connected to the upper fixed plate 19 to drive the upper fixed plate 19 to move up and down. The upper fixed plate 19 is located below the horizontal mounting plate 8, and the second guide rod 20 is connected to the upper fixed plate 19 and slides with the horizontal mounting plate 8 in the up and down directions. The stirring mechanism includes a stirring shaft 21 and a stirring blade 22 installed on the stirring shaft 21. The stirring motor 18 is fixed on the upper fixed plate 19, and the output end of the stirring motor 18 is connected to the stirring connecting rod 23 through a coupling, and the stirring connecting rod 23 is connected to the stirring shaft 21. When the lifting cylinder 17 extends downward, it drives the stirring shaft 21 to move downward through the upper fixed plate 19. When the stirring shaft 21 extends into the degassing side ink barrel 25, the stirring motor 18 is turned on to perform the stirring and degassing operation. In order to ensure the stable operation of the stirring shaft 21, a support seat is connected to the lower side of the upper fixed plate 19 through a suspension rod. A first angular contact ball bearing that cooperates with the stirring connecting rod 23 is provided in the support seat.

[0050] The second dynamic sealing structure 38 is also arranged on the upper side wall of the vacuum box 4. Figure 5 As shown, it includes a second sealing seat 382, ​​a bushing pressure ring 386, an oil-free bushing 385, a second sealing ring 381, a second sealing pressing sleeve 383, and a second sealing pressing block 384. The second sealing seat 382 is fixed to the upper wall of the vacuum chamber 4 via screws. The oil-free bushing 385 is positioned within the second sealing seat 382 and sleeved onto the stirring connecting rod 23. The bushing pressure ring 386 is fixed to the top of the second sealing seat 382, ​​pressing the oil-free bushing 385 tightly against the second sealing seat 382. The second sealing ring 381 is located below the oil-free bushing 385, with two spaced apart in the vertical direction. Two second sealing pressing sleeves 383 are provided, one below each second sealing ring 381. The second sealing pressing block 384 is connected to the bottom of the second sealing seat 382 and presses against the bottom second sealing pressing sleeve 383. The stirring connecting rod 23 is sealed during the lifting process through the above-mentioned second dynamic sealing structure 38.

[0051] The third power mechanism includes a rotary cylinder 27 and a rotary shaft 29 connected to the output end of the rotary cylinder 27. The rotary shaft 29 is coaxially fixed with the turntable 26 to drive the turntable 26 to rotate. The third dynamic sealing structure 39 is provided on the lower side wall of the vacuum box 4. Figure 6As shown, it includes a third sealing ring 391, a third sealing seat 392, a third sealing sleeve 393, a third sealing block 394, and a second angular contact ball bearing 395. The second angular contact ball bearing 395 is set in the third sealing seat 392 and is fixed by a bearing pressure ring on the top of the third sealing seat 392. The third sealing ring 391 is located below the second angular contact ball bearing 395, with two spaced apart in the vertical direction; two third sealing sleeves 393 are provided, each located below a corresponding third sealing ring 391; the third sealing block 394 is connected to the bottom of the third sealing seat 392 and is pressed against the bottom of the third sealing sleeve 393. The rotating shaft 29 is sealed by the above-mentioned third dynamic sealing structure 39, and the sealing part is located in the second power chamber 3.

[0052] The second power chamber 3 is also provided with a limit buffer mechanism, such as Figure 8 As shown, the limit buffer mechanism includes a swing arm 31, a sensor 30 and a buffer 28. The swing arm 31 is vertically connected to the rotating shaft 29. Two sensors 30 are provided and are arranged on both sides of the radial direction of the rotating shaft 29 to detect the position of the swing arm 31; two buffers 28 are arranged in parallel and spaced apart to cooperate with the swing arm 31 to stop.

[0053] In this embodiment, Figure 7 As shown, the ink barrel 24 on the ink supply side and the ink barrel 25 on the degassing side have the same structure, each comprising a barrel body and a plurality of spaced-apart ridges 32 located along the circumferential edge of the barrel body bottom. The turntable 26 is provided with stopper blocks 33 that engage with corresponding ridges 32 in the vertical direction. A stopper clearance groove for the stopper blocks 33 is formed between any two adjacent ridges 32, and a ridge 32 clearance groove for the stopper blocks 33 is formed between any two adjacent ridges 32. An anti-rotation interlocking block 34 is provided on the turntable 26 between the ink barrel 24 on the ink supply side and the degassing side. The anti-rotation interlocking block 34 has two stopper portions, each for stopping the ink barrel 24 on the ink supply side and the degassing side, 25, circumferentially.

[0054] The first power chamber 2 is also provided with a vacuum gauge for detecting the vacuum degree in the vacuum chamber 7. Before operation, the vacuum chamber 7 needs to be evacuated. When the ink in the ink barrel 24 on the ink supply side is used up and switched to the degassing side, the box door 5 needs to be opened to replenish the ink. Before replenishing the ink, the ink squeezing piston 15 needs to be driven down into the ink barrel on the ink supply side by the lifting drive motor 9 to form a seal. Since the vacuum chamber 7 is in a vacuum state, a vacuum breaking structure 36 is provided on the upper wall of the vacuum box 4 for easy opening. Figure 2 、 Figure 3 and Figure 9As shown, the vacuum breaking structure 36 includes a vent hole provided on the upper wall of the vacuum box 4. A filter 362 is provided at the opening of the vent hole. A vent pipe is connected to the vent hole, and the vent pipe passes through the cabinet 1 and is connected to the atmosphere. The vacuum breaking structure 36 also includes a flow guide box 361 fixed to the outside of the vent hole. The flow guide box 361 is located in the vacuum chamber 7, and a plurality of flow guide holes 363 are formed on the surrounding walls of the flow guide box 361.

[0055] The working process of the present invention is as follows: in the initial state, the degassing side ink barrel 25 and the ink supply side ink barrel 24 are both filled with ink, the operator closes the box door 5 and presses the start button, the vacuum pump starts to evacuate the vacuum chamber 7, and then the lifting cylinder 17 extends downward to drive the stirring motor 18 and the stirring shaft 21 to descend to their positions, and then the stirring motor 18 drives the stirring shaft 21 to rotate, and the stirring blade 22 on the stirring shaft 21 stirs and degases the ink. After the degassing is completed, the stirring motor 18 is turned off, the stirring shaft 21 stops rotating, and the lifting cylinder 17 extends downward to drive the stirring motor 18 and the stirring shaft 21 to descend to their positions. The lowering cylinder 17 retracts upward to drive the stirring shaft 21 to rise and leave the degassing side ink barrel 25; at this time, the turntable 26 rotates 180°, and the degassing ink barrel is rotated to the ink supply side, while the undegassing ink barrel is rotated to the degassing side; at this time, the lifting drive motor 9 rotates to drive the lifting screw 10 to descend, and the lifting screw 10 drives the piston rod 16 to descend, and the piston rod 16 drives the ink squeezing piston 15 to move to squeeze ink, thereby realizing ink supply to the plugging machine; at the same time, the undegassing ink barrel is degassing. When the ink in the ink barrel 24 on the ink supply side is exhausted, the lifting drive motor 9 reverses, driving the ink squeezing piston 15 upward via the lifting screw 10, leaving the ink barrel 24 on the ink supply side. Thereafter, the rotary cylinder 27 drives the rotary shaft 29 to rotate 180°, switching the debubbled ink barrel to the ink supply side and the empty ink barrel to the debubbling side. At this point, the lifting drive motor 9 rotates forward to control the ink squeezing piston 15 to enter the ink barrel 24 on the ink supply side, forming a seal with the ink barrel 24 on the ink supply side via the sealing ring on the ink squeezing piston 15. The vacuum is then broken via the vacuum breaking mechanism 36, opening the chamber door 5, and ink is added to the debubbling side ink barrel. While adding ink, the lifting drive motor 9 controls the ink squeezing piston 15 to press downward to supply ink. After ink filling is complete, the chamber door 5 is closed, and the vacuum chamber 7 is evacuated again. The filled ink barrel is then debubbled, preparing for the next ink barrel switch. When the ink in the ink barrel 24 on the ink supply side is used up again, the ink barrel 25 on the degassing side is switched to the ink supply side again, and the cycle is repeated to improve the working efficiency.

[0056] It should be noted that the ink supply side ink barrel 24 refers to the ink barrel located on the ink supply side, and the side of the turntable 26 corresponding to the ink squeezing mechanism is the ink supply side; the degassing side ink barrel 25 refers to the ink barrel located on the degassing side, and the side of the turntable 26 corresponding to the stirring mechanism is the degassing side. When the turntable 26 rotates and switches, the positions of the two ink barrels are switched.

[0057] The present invention places the power mechanism outside the vacuum chamber 7 and configures a dynamic sealing structure to isolate any possible leaking lubricating grease outside the vacuum chamber 7, thereby preventing contamination of the ink inside the vacuum chamber 7. Furthermore, the present invention employs two ink barrels to alternately supply ink while ensuring complete degassing, thereby improving production efficiency.

[0058] In actual use, a storage tank can be provided outside the cabinet 1. After the ink is manually added to the storage tank, the ink in the storage tank is preliminarily stirred and degassed. After completion, the ink in the storage tank is conditionally (at a constant temperature) stored. When the ink barrel 24 on the ink supply side is used up and switched, the ink in the storage tank can be transported to the degassed ink barrel 25 on the degassed side in a metered supply manner for further degassed standby use. A liquid level gauge is provided in the storage tank to remind manual replenishment when the ink is almost used up, which can greatly extend the ink replenishment cycle and make the system more perfect.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ink supply device for a vacuum plugging machine, comprising a cabinet, characterized in that: The cabinet is provided with a vacuum chamber and a power chamber separated from each other. The vacuum chamber is provided with a turntable, an ink barrel on the ink supply side and an ink barrel on the degassing side mounted on the turntable, an ink squeezing mechanism for extending into the ink barrel on the ink supply side, and a stirring mechanism for extending into the ink barrel on the degassing side. The stirring mechanism is used to stir the ink in the ink barrel on the degassing side to degas the ink, and the ink squeezing mechanism is used to squeeze the ink in the ink barrel on the ink supply side to supply ink to the plugging machine. The power chamber is provided with a first power mechanism that is transmission-connected to the ink squeezing mechanism to drive the ink squeezing mechanism to rise and fall, a second power mechanism that is transmission-connected to the stirring mechanism to drive the stirring mechanism to rotate and rise, and a third power mechanism that is transmission-connected to the turntable to drive the turntable to rotate; the power chamber is provided with two, respectively located on the upper and lower sides of the vacuum chamber; the first power mechanism and the second power mechanism are located in the upper power chamber, and the third power mechanism is located in the lower power chamber; Dynamic sealing structures are provided on the wall of the vacuum chamber at positions corresponding to each power mechanism; The ink squeezing mechanism includes an ink squeezing piston and a piston rod, and the piston rod is sealed with a corresponding dynamic sealing structure; the second power mechanism includes a stirring motor, and the stirring mechanism includes a stirring shaft and a stirring blade installed on the stirring shaft. A stirring connecting rod is transmission-connected between the output end of the stirring motor and the stirring shaft, and the stirring connecting rod is sealed with a corresponding dynamic sealing structure; the third power mechanism includes a rotary cylinder and a rotating shaft connected to the output end of the rotary cylinder, the rotating shaft is coaxially fixed with the turntable, and the rotating shaft is sealed with a corresponding dynamic sealing structure; The three dynamic sealing structures all include a sealing seat, a sealing ring, a sealing sleeve and a sealing pressure block. At least two sealing rings are arranged at intervals in the vertical direction. The sealing rings are sleeved on the corresponding piston rod, stirring connecting rod or rotating shaft. The sealing sleeve is pressed under the corresponding sealing ring. The sealing pressure block is connected to the bottom of the sealing seat and presses the sealing sleeve at the bottom. The ink barrel on the ink supply side and the ink barrel on the degassing side have the same structure, both comprising a barrel body and a plurality of convex edges arranged at intervals on the circumferential edge of the bottom of the barrel body; a limit clamping seat is provided on the turntable and cooperates with the corresponding convex edges in the upper and lower directions; a clamping seat avoidance groove for avoiding the limit clamping seat is formed between any two adjacent convex edges, and a convex edge avoidance groove for avoiding the convex edges is formed between any two adjacent limit clamping seats; an anti-rotation interlocking block is provided on the turntable between the ink barrel on the ink supply side and the ink barrel on the degassing side for stopping the ink barrel on the ink supply side and the ink barrel on the degassing side in the circumferential direction of the turntable; A vacuum breaking structure is provided on the cavity wall of the vacuum chamber facing the first power mechanism and the second power mechanism; the vacuum breaking structure includes an air vent arranged on the upper wall of the vacuum box and a guide box fixed on the outside of the air vent, a filter is provided at the opening of the air vent, a ventilation pipe is connected to the air vent, the ventilation pipe passes through the cabinet and is connected to the atmosphere, the guide box is located in the vacuum chamber, and a plurality of guide holes are provided on the surrounding walls of the guide box.

2. The ink supply device for a vacuum plugging machine according to claim 1, characterized in that: A horizontal mounting plate is provided in the power chamber located on the upper side. The first power mechanism includes a lifting drive motor, a lifting screw, a drive nut, a first guide rod, an upper guide plate and a lower fixed plate. The lifting drive motor is fixed on the horizontal mounting plate, the output end of the lifting drive motor is connected to the drive nut, the lifting screw is threadedly connected to the drive nut, the upper guide plate and the lower fixed plate are respectively connected to the upper and lower ends of the lifting screw, the first guide rod is connected to the lower fixed plate, and slides with the horizontal mounting plate in the upper and lower directions; the piston rod and the lower fixed plate are relatively fixed.

3. The ink supply device for a vacuum plugging machine according to claim 2, characterized in that: The second power mechanism also includes a lifting cylinder, an upper fixed plate, and a second guide rod. The lifting cylinder is fixed on the horizontal mounting plate. The output end of the lifting cylinder is connected to the upper fixed plate. The upper fixed plate is located below the horizontal mounting plate. The second guide rod is connected to the upper fixed plate and slides with the horizontal mounting plate in the up and down directions. The stirring motor is fixed on the upper fixed plate.

4. The ink supply device for a vacuum plugging machine according to claim 1, characterized in that: A limit buffer mechanism is also provided in the power chamber located on the lower side. The limit buffer mechanism includes a swing arm, a sensor and a buffer. The swing arm is vertically connected to the rotating shaft. Two sensors are provided and arranged on both sides of the radial direction of the rotating shaft to detect the position of the swing arm; two buffers are arranged in parallel and spaced apart to cooperate with the swing arm to stop.

5. The ink supply device for a vacuum plugging machine according to claim 1, characterized in that: A hollow vacuum box is installed in the cabinet body, and box doors are installed outside the cabinet body at the openings on both sides of the vacuum box. The box doors are provided with observation windows. When the box doors are closed, they and the space inside the vacuum box form the vacuum chamber.

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