Double-station jet printing machine

Abstract

The invention relates to the technical field of PCB manufacturing equipment, and discloses a double-station jet printing machine which comprises a base station, two gantry seats are arranged on the base station, moving assemblies are arranged in the base station and the gantry seats, ink jet heads are arranged on the lower sides of the gantry seats, two adsorption platforms are arranged in the gantry seats, and the two adsorption platforms are arranged on the base station. A maintenance assembly is arranged on the left surface of the base table, an anti-collision assembly is arranged on the front side of the gantry base, UV curing lamps are arranged on the two sides of the gantry base, glass covers are arranged on the lower surfaces of the UV curing lamps, and shielding assemblies are arranged on the lower sides of the glass covers. The maintenance assembly with the containing cavity and the one-way valve is arranged, redundant air is exhausted through the piston effect generated when the ink jet head descends, and dual sealing is achieved in cooperation with the moisture absorption suction cup; meanwhile, the controller intelligently controls the atomizer according to feedback of the humidity sensor and the air pressure sensor, a constant-humidity microenvironment is constructed in the cavity, and the problem of plug blockage caused by dry and hard ink is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of PCB manufacturing equipment technology, and in particular to a dual-station inkjet printer. Background Technology

[0002] PCB inkjet printers, as efficient graphic processing equipment, are widely used for creating characters, solder mask, and circuit patterns on printed circuit boards. However, existing inkjet printers face numerous challenges during long-term operation, with printhead stability and lifespan being particularly prominent issues. Traditional maintenance devices typically employ an open structure, passively covering the nozzles with a simple suction cup, which is insufficient to effectively isolate them from external air. Especially in environments with significant temperature and humidity fluctuations, UV inks or fast-drying inks are prone to drying and solidifying at the nozzles, leading to printhead clogging. Furthermore, the drastic pressure changes during cleaning and ink extraction can cause irreversible damage to the delicate piezoelectric structures inside the printhead.

[0003] Furthermore, there are safety hazards associated with the high-speed movement of the nozzle module. Most existing equipment relies on software limits or simple limit switches, which lack effective physical protection mechanisms against sudden obstacles such as tools left behind due to operational errors, warped PCB boards that have not been flattened, or foreign objects on the workbench. Once a collision occurs, it can easily lead to damage to expensive core components such as the nozzle and curing lamp.

[0004] Meanwhile, in the curing process, the light efficiency and uniformity of the UV curing lamp directly affect product quality. Ink mist generated during printing easily adheres to the protective glass of the curing lamp, and long-term accumulation reduces UV transmittance, causing localized insufficient curing. Furthermore, the curing lamp is usually kept on or linked to the printhead, irradiating non-printing areas as well. This not only wastes energy, but the scattered stray light can also adversely affect other parts of the equipment (such as printheads in standby mode). Summary of the Invention

[0005] The purpose of this invention is to provide a dual-station inkjet printer that solves the problems of easy clogging of printheads, low operational reliability, and unstable curing quality in traditional PCB inkjet printers.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dual-station inkjet printer includes a base with two gantry seats. Moving components are installed inside both the base and the gantry seats. An inkjet head is installed on the underside of each gantry seat. Two suction platforms are installed inside each gantry seat. A maintenance component is installed on the left surface of the base. An anti-collision component is installed on the front side of each gantry seat. UV curing lamps are installed on both sides of each gantry seat. A glass cover is installed on the lower surface of each UV curing lamp, and a shielding component is installed on the lower side of the glass cover.

[0008] The maintenance component includes a chamber with an internal receiving cavity. A horizontal seat is fixedly connected inside the chamber, and a moisture-absorbing base is fixedly connected to the horizontal seat. A moisture-absorbing suction cup is fixedly connected to the top of the moisture-absorbing base. An opening is located at the top of the chamber. A solvent evaporation tank is provided at the bottom of the chamber. A humidity sensor and a pressure sensor are fixedly connected to the inner wall of the chamber. An atomizer is located below the humidity sensor and the pressure sensor. A collection box is fixedly connected to the bottom of the chamber. An ink pump is connected to the right side of the collection box. A pipe is fixedly connected to the output end of the ink pump and communicates with the horizontal seat. A one-way valve is connected to the outer wall of the chamber.

[0009] Preferably, the moving component includes a first motor, which is mounted on the right side of the base. A horizontal lead screw is fixedly connected to the output end of the first motor. A horizontal limiting rod is provided on the outside of the horizontal lead screw. A sliding seat is slidably connected to the outside of the horizontal lead screw and the horizontal limiting rod. Two sets of guide rails are provided on the base. A slider is fixedly connected to the lower side of the gantry seat. A second motor is fixedly connected to the top of the gantry seat. A vertical lead screw is fixedly connected to the output end of the second motor. A vertical limiting rod is provided on the outside of the vertical lead screw. A moving seat is slidably connected to the outside of the vertical lead screw and the vertical limiting rod. A vertical plate is fixedly connected to the front side of the moving seat.

[0010] Preferably, the anti-collision assembly includes two fixed plates. The front side of the fixed plate is fixedly connected to the front side of the vertical plate. A guide post is fixedly connected inside the fixed plate. A return spring is provided on the outside of the guide post. A floating hanging plate is slidably connected to the outside of the guide post. The return spring abuts against the upper side of the floating hanging plate. A trigger baffle is fixedly connected to the left surface of the floating hanging plate. An emergency stop sensor is fixedly connected to the vertical plate. An alarm is installed on the front side of the base.

[0011] Preferably, the shielding assembly includes a light-shielding plate body disposed on the lower side of the glass cover. A flexible scraper is provided on the side of the light-shielding plate body facing the glass cover, and the flexible scraper is in elastic contact with the surface of the glass cover. A mounting bracket is fixedly connected to the outer wall of the vertical plate by bolts. A miniature cylinder is mounted on the mounting bracket. The telescopic end of the miniature cylinder is fixedly connected to the light-shielding plate body. A waste ink collection micro-groove is fixedly connected to the lower side of the vertical plate.

[0012] Preferably, a fixing frame is fixedly connected to the outside of the base, and a controller is installed on the front side of the fixing frame. The controller is further configured to: start the atomizer when the detection value of the humidity sensor is lower than a first preset humidity threshold; and when the detection value of the air pressure sensor is higher than a second preset pressure threshold, even if the humidity does not meet the standard, prioritize stopping or reducing the power of the atomizer.

[0013] Preferably, the exhaust direction of the one-way valve is from the inside of the receiving cavity to the outside; the size of the opening is adapted to the outer contour size of the inkjet head, and a sealing ring is provided at the opening; when the inkjet head descends from the opening into the receiving cavity, the inkjet head acts as a piston to compress the air in the cavity, and the excess gas is discharged through the one-way valve to balance the pressure in the cavity.

[0014] Preferably, the upper surface of the moisture-absorbing suction cup is made of elastic rubber, which is used to seal the nozzle surface of the inkjet head when the inkjet head descends to the bottom; when the controller controls the ink pump to work, a negative pressure is generated in the moisture-absorbing suction cup through the tube and the cross seat, which sucks the waste ink in the inkjet head into the collection box.

[0015] Preferably, the atomizer is located on one side of the solvent evaporation tank and is used to atomize and diffuse the moisturizing solvent in the solvent evaporation tank into the receiving cavity.

[0016] Preferably, a CCD camera is fixedly connected to the top of the mounting bracket, and a light source is fixedly connected to the top of the mounting bracket.

[0017] Preferably, the CCD camera is used to identify the reference mark on the adsorption platform and feed back the position information to the controller, which calibrates the printing coordinates of the inkjet head based on the position information.

[0018] In summary, the present invention has at least one of the following beneficial technical effects:

[0019] 1. This invention, by setting up a maintenance component with a housing cavity and a one-way valve, utilizes the piston effect generated when the inkjet head descends to expel excess air, and achieves double sealing in conjunction with a moisture-absorbing suction cup; at the same time, the controller intelligently controls the atomizer based on feedback from humidity and air pressure sensors to create a constant humidity microenvironment within the cavity, effectively solving the problem of ink clogging caused by ink drying and significantly reducing maintenance costs.

[0020] 2. This invention incorporates an anti-collision component on the front side of the vertical plate. Utilizing the cooperation of a floating mounting plate and a return spring, when the equipment encounters an abnormal obstacle during movement, the mounting plate is forced upwards, causing a trigger baffle to block the emergency stop sensor, thereby quickly triggering the alarm and stopping the machine immediately. This design provides immediate response to collision risks, effectively protecting the expensive nozzles and precision moving mechanisms from mechanical damage.

[0021] 3. This invention includes a shielding assembly with a light-shielding plate and a flexible scraper below the UV curing lamp. By moving the light-shielding plate using a micro-cylinder, the UV irradiation range can be flexibly adjusted according to the printing area, avoiding ineffective curing or light leakage. Furthermore, the flexible scraper automatically removes ink mist and dust from the glass cover surface during movement, ensuring consistent light transmittance and thus guaranteeing uniform PCB printing curing. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a side view of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the base of the present invention;

[0025] Figure 4 This is a schematic diagram of the gantry structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the anti-collision component structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the maintenance component structure of the present invention;

[0028] Figure 7 This is a partial structural diagram of the present invention;

[0029] Figure 8 This is a schematic diagram of the shielding component structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the glass cover structure of the UV curing lamp of the present invention;

[0031] Figure 10 This is a schematic diagram of the CCD camera and light source structure of the present invention.

[0032] The components include: 1. Base; 2. Gantry; 3. Moving assembly; 31. Motor 1; 32. Horizontal lead screw; 33. Horizontal limit rod; 34. Sliding seat; 35. Vertical plate; 36. Guide rail; 37. Slider; 38. Motor 2; 39. Vertical lead screw; 310. Vertical limit rod; 311. Moving seat; 4. Adsorption platform; 5. Inkjet head; 6. Maintenance assembly; 61. Chamber; 62. Horizontal seat; 63. Receiving cavity; 64. One-way valve; 65. Moisture-absorbing base; 66. Opening; 67. Solvent evaporation tank; 68. Ink pump; 69. Tube; 610. Humidity sensor. 611. Pressure sensor; 612. Moisture suction cup; 613. Atomizer; 614. Collection box; 7. Anti-collision assembly; 71. Fixing plate; 72. Guide column; 73. Floating hanging plate; 74. Return spring; 75. Trigger baffle; 76. Emergency stop sensor; 77. Alarm; 8. UV curing lamp; 9. Glass cover; 10. Shielding assembly; 101. Mounting bracket; 102. Miniature cylinder; 103. Light shield body; 104. Flexible scraper; 105. Waste ink collection micro-channel; 11. Controller; 12. CCD camera; 13. Light source; 14. Fixing frame. Detailed Implementation

[0033] The following is in conjunction with the appendixFigure 1 - Appendix Figure 10 The present invention will be further described in detail below.

[0034] This invention provides a dual-station inkjet printer, including a base 1, on which two gantry seats 2 are mounted. Both the base 1 and the gantry seats 2 have moving components 3 inside. Inkjet heads 5 are mounted on the lower side of each gantry seat 2. Two suction platforms 4 are mounted inside each gantry seat 2. A maintenance component 6 is mounted on the left surface of the base 1. An anti-collision component 7 is mounted on the front side of each gantry seat 2. UV curing lamps 8 are mounted on both sides of each gantry seat 2. A glass cover 9 is mounted on the lower surface of each UV curing lamp 8. A shielding component 10 is mounted on the lower side of the glass cover 9. A controller 11 is mounted on the front side of a mounting bracket 14. The maintenance component 6 includes a chamber 61, inside which is a receiving cavity 63. A horizontal seat 62 is fixedly connected inside the chamber 61. A fixed... A moisture-absorbing base 65 is connected, and a moisture-absorbing suction cup 612 is fixedly connected to the top of the moisture-absorbing base 65. An opening 66 is formed at the top of the chamber 61. A solvent evaporation tank 67 is provided at the bottom of the chamber 61. A humidity sensor 610 and a pressure sensor 611 are fixedly connected to the inner wall of the chamber 61. An atomizer 613 is provided below the humidity sensor 610 and the pressure sensor 611. A collection box 614 is fixedly connected to the bottom of the chamber 61. An ink pump 68 is connected to the right side of the collection box 614. A tube 69 is fixedly connected to the output end of the ink pump 68. The tube 69 is connected to the cross seat 62. The atomizer 613 is located on one side of the solvent evaporation tank 67 and is used to atomize the moisturizing solvent in the solvent evaporation tank 67 and diffuse it into the receiving cavity 63.

[0035] Specifically, when the controller 11 issues a maintenance command, the gantry 2 moves the inkjet head 5 to directly above the opening 66 of the maintenance component 6, and is driven by the Z-axis through the vertical lead screw 39 to descend into the receiving cavity 63. During this process, the outer wall of the inkjet head 5 cooperates with the sealing ring at the opening 66 to form the first layer of isolation. When the nozzle surface of the inkjet head 5 is completely sealed by the moisture-absorbing suction cup 612, the second layer of isolation is formed. At this time, a closed microenvironment is formed inside the receiving cavity 63. Based on the real-time data from the humidity sensor 610, the controller 11 will activate the atomizer 613 when the humidity is lower than the preset value, atomizing the moisturizing solvent in the solvent evaporation tank 67 into fine particles, rapidly increasing the humidity inside the cavity, thereby effectively preventing the ink at the nozzle from drying out due to solvent evaporation. At the same time, the ink pump 68 can generate negative pressure in the moisture-absorbing suction cup 612 to powerfully remove air bubbles or impurities from the nozzle. It solves the technical pain points of traditional open maintenance stations, such as poor moisturizing effect and frequent printhead clogging due to environmental interference. Through active environmental control, it greatly improves the stability and service life of the inkjet head 5, and realizes true intelligent and automated maintenance.

[0036] See attached document Figure 1 - Appendix Figure 3The moving component 3 includes a motor 31, which is mounted on the right side of the base 1. A horizontal lead screw 32 is fixedly connected to the output end of the motor 31. A horizontal limiting rod 33 is provided on the outside of the horizontal lead screw 32. A sliding seat 34 is slidably connected to the outside of the horizontal lead screw 32 and the horizontal limiting rod 33. Two sets of guide rails 36 are provided on the base 1. A slider 37 is fixedly connected to the lower side of the gantry 2. A motor 38 is fixedly connected to the top of the gantry 2. A vertical lead screw 39 is fixedly connected to the output end of the motor 38. A vertical limiting rod 310 is provided on the outside of the vertical lead screw 39. A moving seat 311 is slidably connected to the outside of the vertical lead screw 39 and the vertical limiting rod 310. The front side of the moving seat 311 is fixedly connected to the vertical plate 35.

[0037] Specifically, after the controller 11 issues a motion command, the motor 31 located on the right side of the base 1 drives the horizontal lead screw 32 to rotate. Through threaded transmission with the sliding seat 34, this drives the entire gantry 2 to move along the two sets of guide rails 36 on the base 1 in a high-precision, large-range X-axis direction, covering the two adsorption platforms 4. Simultaneously, the motor 38 installed on the top of the gantry 2 drives the vertical lead screw 39 to rotate, causing the cooperating moving seat 311, as well as the fixed vertical plate 35 and inkjet head 5, to rise and fall along the vertical limit rod 310 in the Z-axis direction. The horizontal limit rod 33 and the vertical limit rod 310 provide support for the lead screw and prevent the moving parts from rotating, ensuring the linearity and rigidity of the motion. This solves the problem of ensuring printing accuracy under a large stroke in a dual-station environment, ensuring the clarity of the printed pattern and the accuracy of the alignment, and providing a reliable motion platform guarantee for high-quality PCB character and line printing.

[0038] See attached document Figure 5 - Appendix Figure 6 The anti-collision component 7 includes two fixed plates 71. The front side of the fixed plate 71 is fixedly connected to the front side of the vertical plate 35. The inside of the fixed plate 71 is fixedly connected to the guide post 72. The outside of the guide post 72 is provided with a return spring 74. The outside of the guide post 72 is slidably connected to the floating hanging plate 73. The return spring 74 abuts against the upper side of the floating hanging plate 73. The left surface of the floating hanging plate 73 is fixedly connected to the trigger baffle 75. The vertical plate 35 is fixedly connected to the emergency stop sensor 76. An alarm 77 is installed on the front side of the base 1.

[0039] Specifically, under normal circumstances, the floating mounting plate 73 is in its lowest position under the elastic force of the return spring 74, and the trigger baffle 75 on it is disengaged from the sensing area of ​​the emergency stop sensor 76. When the gantry 2 moves, if the bottom of the floating mounting plate 73 unfortunately hits an undetected obstacle on the workbench (such as a warped PCB board, a dropped tool, etc.), the impact force will overcome the supporting force of the return spring 74, causing the floating mounting plate 73 to slide upwards instantaneously along the guide post 72. As the floating mounting plate 73 moves upwards, the trigger baffle 75 on its side will immediately enter the detection range of the emergency stop sensor 76 (such as blocking the photoelectric switch), and the sensor signal will change. After receiving this signal, the controller 11 will execute the emergency stop command with the highest priority, cut off the power to all motors, and drive the alarm 77 to emit an audible and visual alarm. This design cleverly solves the problem of potentially devastating collisions caused by software failures or blind spots. Through a purely mechanical triggering mechanism, it provides hardware-level safety redundancy that is faster and more reliable than software logic, effectively protecting valuable core components such as the inkjet head from physical impact damage.

[0040] See attached document Figure 5 - Appendix Figure 8 The shielding assembly 10 includes a light shield body 103, which is disposed on the lower side of the glass cover 9. A flexible scraper 104 is provided on the side of the light shield body 103 facing the glass cover 9, and the flexible scraper 104 is in elastic contact with the surface of the glass cover 9. A mounting bracket 101 is fixedly connected to the outer wall of the vertical plate 35 by bolts. A micro cylinder 102 is mounted on the mounting bracket 101. The telescopic end of the micro cylinder 102 is fixedly connected to the light shield body 103. A waste ink collection micro groove 105 is fixedly connected to the lower side of the vertical plate 35.

[0041] Specifically, the controller 11, based on the real-time position of the inkjet head 5, controls the extension and retraction of the micro cylinder 102 on the mounting bracket 101 to drive the light shield body 103 to reciprocate under the glass cover 9. When the inkjet head 5 is in a non-printing area, the light shield body 103 extends to block the ultraviolet rays emitted by the UV curing lamp 8, avoiding energy waste and the impact of stray light on other parts of the machine. When curing is required, the light shield body 103 quickly retracts. Its core innovation lies in the flexible scraper 104 installed on the top of the light shield body 103, which is made of corrosion-resistant and highly elastic material, allowing it to scrape against the lower surface of the glass cover 9 with each movement. Ink mist and dust generated during the printing process are collected by the scraper and scraped into the waste ink collection micro-groove 105 on the lower side of the vertical plate 35 when the scraper reaches the end of its stroke. It solves two major industry problems: UV lamp energy waste and light decay. It not only achieves the energy-saving goal of on-demand exposure, but also keeps the glass cover clean at all times, ensuring a constant UV transmittance and thus guaranteeing the consistency of curing effect for each batch of products.

[0042] See attached document Figure 6 - Appendix Figure 7 The controller 11 is further configured to: activate the atomizer 613 when the detection value of the humidity sensor 610 is lower than the first preset humidity threshold; and when the detection value of the air pressure sensor 611 is higher than the second preset pressure threshold, even if the humidity does not meet the standard, prioritize stopping or reducing the power of the atomizer 613. The upper surface of the moisture suction cup 612 is made of elastic rubber material, which is used to seal the nozzle surface of the inkjet head 5 when the inkjet head 5 descends to the bottom. When the controller 11 controls the ink pump 68 to work, a negative pressure is generated in the moisture suction cup 612 through the tube body 69 and the cross seat 62, which sucks the waste ink in the inkjet head 5 into the collection box 614.

[0043] Specifically, in standby mode, the controller 11 continuously polls the data from the humidity sensor 610 and the air pressure sensor 611. When the humidity is below the set safety threshold, the controller 11 determines that the internal environment is too dry and there is a risk of nozzle clogging, and then starts the atomizer 613 to humidify. However, unlimited humidification may cause the air pressure inside the cavity to rise, which may put reverse pressure on the printhead. Therefore, the controller 11 also monitors the air pressure value. Once it exceeds the safety threshold, the controller 11 will immediately stop or reduce the power of the atomizer 613, prioritizing pressure safety even if the humidity has not yet reached the standard. During the cleaning process, the controller 11 precisely controls the start time and speed of the ink pump 68, forming a stable and moderate negative pressure at the moisture suction cup 612 through the flow channels inside the tube 69 and the cross seat 62, gently sucking out waste ink and air bubbles. This closed-loop control strategy based on dual sensor feedback solves the problem of extensive management in traditional maintenance, and realizes dynamic and precise adjustment of the humidification environment within the safe pressure range, reflecting the high level of intelligence of the equipment.

[0044] See attached document Figure 1 Appendix Figure 6 and attached Figure 7 The exhaust direction of the one-way valve 64 is from the inside of the receiving cavity 63 to the outside; the size of the opening 66 is adapted to the outer contour size of the inkjet head 5, and a sealing ring is provided at the opening 66; when the inkjet head 5 descends from the opening 66 into the receiving cavity 63, the inkjet head 5 acts as a piston to compress the air in the cavity, and the excess gas is discharged through the one-way valve 64 to balance the pressure in the cavity.

[0045] Specifically, when the printhead 5 descends at high speed into the opening 66 sealed by the sealing ring, it acts like a piston, rapidly compressing the air inside the chamber 63, causing a sudden surge in internal pressure. Without effective pressure relief, this positive pressure wave could impact the nozzle of the printhead 5, damaging the meniscus of the ink droplets, or even forcing air into the ink path system, causing irreparable blockages. By installing a one-way valve 64 on the side wall of the chamber 61 that only allows gas to escape from the inside out, the valve automatically opens when the internal pressure exceeds the external atmospheric pressure, allowing the compressed air to escape smoothly, thus maintaining a balance between the internal and external pressures. When the printhead 5 needs to rise and leave, no negative pressure suction is generated inside the chamber, ensuring smooth Z-axis movement. This passive pressure balancing design solves the risk of air pressure shock when the printhead enters the enclosed maintenance station, ensuring absolute safety of the printhead during maintenance with extremely low cost and high reliability.

[0046] See attached document Figure 9 - Appendix Figure 10 A mounting bracket 14 is fixedly connected to the outside of the base 1. A CCD camera 12 is fixedly connected to the top of the mounting bracket 14. A light source 13 is fixedly connected to the top of the mounting bracket 14. The CCD camera 12 is used to identify the reference mark on the adsorption platform 4 and feed the position information back to the controller 11. The controller 11 calibrates the printing coordinates of the inkjet head 5 according to the position information.

[0047] Specifically, before the actual printing, the light source 13 on the mounting bracket 14 illuminates the PCB board on the adsorption platform 4, and the CCD camera 12 captures images of the entire board or key areas. The image processing algorithm built into the controller 11 automatically identifies preset reference marks in the image. By calculating the deviation between the actual position of the mark point in the image coordinate system and the theoretical position in the standard CAD data, the system can accurately obtain the overall translational and rotational deviations of the PCB board on the platform. The controller 11 does not move the bulky PCB board, but directly uses these deviation values ​​as correction parameters and applies them in real time to the printing coordinate system of the inkjet head 5 to dynamically compensate for the coordinates of all points and lines to be printed. This solves the problem of printing misalignment caused by manual placement errors or the dimensional tolerances of the PCB itself, simplifies the operation process, reduces the skill requirements for operators, and ensures a high yield rate for the final product.

[0048] Working Principle: When using this device, the PCB board to be printed is first placed on the adsorption platform 4 on the base 1 for fixation. The CCD camera 12 on the fixing frame 14 captures and identifies the reference marks on the PCB board, and feeds back the position information to the controller 11 to calibrate the printing coordinates of the inkjet head 5. Subsequently, the moving component 3 is activated. Motor 1 31 drives the horizontal lead screw 32 to move the gantry 2 horizontally along the guide rail 36. At the same time, motor 2 38 drives the vertical lead screw 39 to adjust the Z-axis height of the moving seat 311 and the inkjet head 5 for precise printing. During the printing process, the UV curing lamp 8 is turned on to cure the ink. The micro cylinder 102 in the shielding component 10 moves the light shield body 103 according to the command to control the irradiation range of the UV light, and the flexible scraper 104 automatically cleans the dirt on the surface of the glass cover 9 during movement. If the floating plate 73 of the anti-collision component 7 encounters an obstacle and moves upward during the movement, the trigger plate 75 will block the emergency stop sensor 76, trigger the alarm 77 and stop the machine to protect the equipment.

[0049] When printing is finished or maintenance is required, the gantry 2 moves above the maintenance assembly 6. Driven by the vertical lead screw 39, the inkjet head 5 descends from the opening 66 into the receiving cavity 63. At this time, the inkjet head 5 acts like a piston, compressing the air inside the cavity. Excess gas pushes open the one-way valve 64 and is discharged, achieving pressure balance within the cavity. When it descends to the bottom, the nozzle surface of the inkjet head 5 tightly adheres to the moisture-absorbing suction cup 612 on the moisture-absorbing base 65, forming a seal. At this time, the controller 11 can activate the ink pump 68, generating negative pressure through the flow channels in the tube 69 and the horizontal seat 62, sucking the waste ink from the printhead into the collection box 614 for cleaning. In standby moisturizing mode, the controller 11, based on feedback from the humidity sensor 610 and the air pressure sensor 611, activates the atomizer 613 to atomize the solvent in the solvent evaporation tank 67, creating a high-humidity environment within the receiving cavity 63 to prevent printhead clogging and to prevent damage to the printhead due to excessive air pressure.

Claims

1. A dual-station inkjet printer, comprising a base (1), characterized in that, Two gantry seats (2) are provided on the base (1). A moving component (3) is provided inside both the base (1) and the gantry seats (2). An inkjet head (5) is provided on the lower side of the gantry seats (2). Two adsorption platforms (4) are provided inside the gantry seats (2). A maintenance component (6) is provided on the left surface of the base (1). An anti-collision component (7) is provided on the front side of the gantry seats (2). UV curing lamps (8) are provided on both sides of the gantry seats (2). A glass cover (9) is provided on the lower surface of the UV curing lamps (8). A shielding component (10) is provided on the lower side of the glass cover (9). The maintenance component (6) includes a chamber (61) with an internal cavity (63). A horizontal seat (62) is fixedly connected inside the chamber (61), and a moisture-absorbing base (65) is fixedly connected to the horizontal seat (62). A moisture-absorbing suction cup (612) is fixedly connected to the top of the moisture-absorbing base (65). An opening (66) is formed at the top of the chamber (61). A solvent evaporation tank (67) is provided at the bottom of the chamber (61). The inner wall of the chamber (61) is fixedly connected to... A humidity sensor (610) and a pressure sensor (611) are connected. An atomizer (613) is provided on the lower side of the humidity sensor (610) and the pressure sensor (611). A collection box (614) is fixedly connected to the bottom of the chamber (61). An ink pump (68) is connected to the right side of the collection box (614). A tube (69) is fixedly connected to the output end of the ink pump (68). The tube (69) is connected to the cross seat (62). A one-way valve (64) is connected to the outer wall of the chamber (61).

2. The dual-station inkjet printer according to claim 1, characterized in that, The moving component (3) includes a motor (31), which is installed on the right side of the base (1). A horizontal lead screw (32) is fixedly connected to the output end of the motor (31). A horizontal limiting rod (33) is provided on the outside of the horizontal lead screw (32). A sliding seat (34) is slidably connected to the outside of the horizontal lead screw (32) and the horizontal limiting rod (33). Two sets of guide rails (36) are provided on the base (1). A slider (37) is fixedly connected to the lower side of the gantry (2). A motor (38) is fixedly connected to the top of the gantry (2). A vertical lead screw (39) is fixedly connected to the output end of the motor (38). A vertical limiting rod (310) is provided on the outside of the vertical lead screw (39). A moving seat (311) is slidably connected to the outside of the vertical lead screw (39) and the vertical limiting rod (310). A vertical plate (35) is fixedly connected to the front side of the moving seat (311).

3. A dual-station inkjet printer according to claim 1, characterized in that, The anti-collision assembly (7) includes two fixed plates (71). The front side of the fixed plate (71) is fixedly connected to the front side of the vertical plate (35). The interior of the fixed plate (71) is fixedly connected to a guide post (72). The outside of the guide post (72) is provided with a reset spring (74). The outside of the guide post (72) is slidably connected to a floating hanging plate (73). The reset spring (74) abuts against the upper side of the floating hanging plate (73). The left surface of the floating hanging plate (73) is fixedly connected to a trigger baffle (75). An emergency stop sensor (76) is fixedly connected to the vertical plate (35). An alarm (77) is installed on the front side of the base (1).

4. A dual-station inkjet printer according to claim 2, characterized in that, The shielding assembly (10) includes a light shield body (103), which is disposed on the lower side of the glass cover (9). A flexible scraper (104) is provided on the side of the light shield body (103) facing the glass cover (9), and the flexible scraper (104) is in elastic contact with the surface of the glass cover (9). The outer wall of the vertical plate (35) is fixedly connected to a mounting bracket (101) by bolts. A miniature cylinder (102) is installed on the mounting bracket (101). The telescopic end of the miniature cylinder (102) is fixedly connected to the light shield body (103). A waste ink collection micro-groove (105) is fixedly connected to the lower side of the vertical plate (35).

5. A dual-station inkjet printer according to claim 1, characterized in that, A mounting bracket (14) is fixedly connected to the outside of the base (1). A controller (11) is installed on the front side of the mounting bracket (14). The controller (11) is further configured to: start the atomizer (613) when the detection value of the humidity sensor (610) is lower than the first preset humidity threshold; and when the detection value of the air pressure sensor (611) is higher than the second preset pressure threshold, even if the humidity does not meet the standard, the power of the atomizer (613) will be stopped or reduced first.

6. A dual-station inkjet printer according to claim 1, characterized in that, The exhaust direction of the one-way valve (64) is from the inside of the receiving cavity (63) to the outside; the size of the opening (66) is adapted to the outer contour size of the inkjet head (5), and a sealing ring is provided at the opening (66); when the inkjet head (5) descends from the opening (66) into the receiving cavity (63), the inkjet head (5) acts as a piston to compress the air in the cavity, and the excess gas is discharged through the one-way valve (64) to balance the pressure in the cavity.

7. A dual-station inkjet printer according to claim 5, characterized in that, The upper surface of the moisture-absorbing suction cup (612) is made of elastic rubber and is used to seal the nozzle surface of the inkjet head (5) when the inkjet head (5) descends to the bottom. When the controller (11) controls the ink pump (68) to work, it generates negative pressure in the moisture-absorbing suction cup (612) through the tube body (69) and the cross seat (62) to suck the waste ink in the inkjet head (5) into the collection box (614).

8. A dual-station inkjet printer according to claim 1, characterized in that, The atomizer (613) is located on one side of the solvent evaporation tank (67) and is used to atomize and diffuse the moisturizing solvent in the solvent evaporation tank (67) into the receiving cavity (63).

9. A dual-station inkjet printer according to claim 5, characterized in that, A CCD camera (12) is fixedly connected to the top of the bracket (14), and a light source (13) is fixedly connected to the top of the bracket (14).

10. A dual-station inkjet printer according to claim 5, characterized in that, The CCD camera (12) is used to identify the reference mark on the adsorption platform (4) and feed back the position information to the controller (11). The controller (11) calibrates the printing coordinates of the inkjet head (5) according to the position information.

Images