Quick adjusting mechanism for ink-jet printing position

Abstract

This utility model relates to the technical field of gypsum board production equipment, specifically to a rapid adjustment mechanism for inkjet printing position, including a printhead, a three-axis adjustment platform, a detection device, and a control system. The printhead is mounted on the three-axis adjustment platform for inkjet printing on gypsum board. The three-axis adjustment platform includes an X-axis adjustment module extending along the width direction of the gypsum board, a Z-axis adjustment module extending along the thickness direction of the gypsum board, and a Y-axis adjustment module extending along the conveying direction of the gypsum board. The detection device is used to detect the edge position offset and thickness value of the gypsum board. The control system is electrically connected to the detection device and the three-axis adjustment platform, receiving the edge position offset signal and thickness value signal output by the detection device, and controlling the movement of the three-axis adjustment platform according to the signals to adjust the position of the printhead in the X, Y, and Z axis directions. This utility model can adapt to the positional changes of gypsum board of different specifications, meeting the requirements of high-precision inkjet printing.

Description

Technical Field

[0001] This utility model relates to the technical field of gypsum board production equipment, specifically to a rapid adjustment mechanism for inkjet printing position. Background Technology

[0002] Existing inkjet printing systems for gypsum board production typically employ photoelectric ranging devices to detect the offset of the gypsum board and drive the printhead to move along the width direction via a follow-up device to adjust the printing position (as described in patent document CN202111386742.9). This follow-up device relies on mechanical buffer linkage components (including a tail-end linkage handle, a delay transmission rod, a transmission sleeve, etc.) to achieve linkage with the board straightening mechanism, and drives the printhead displacement through a pneumatic slide and cylinder.

[0003] However, its structure has significant defects: First, the mechanical transmission chain is relatively long, and the accumulated gaps and elastic deformation of the buffer linkage components lead to response lag, which can easily cause the nozzles to fail to avoid obstacles in a timely manner in high-speed conveying scenarios (such as production line speeds > 60m / min); Second, the pneumatic drive method is affected by air pressure fluctuations, and the displacement accuracy can only reach ±0.5mm, which is difficult to meet the high-precision inkjet printing requirements of QR codes, tiny characters, etc.; Third, the system can only be adjusted along the width of the gypsum board and does not have a thickness detection and height adjustment module. When the gypsum board specifications are changed, the machine needs to be stopped and the nozzle height needs to be manually adjusted, which leads to the interruption of production continuity.

[0004] The aforementioned problems make the existing inkjet printing position adjustment mechanism unable to meet the automation requirements of high-speed, multi-specification gypsum board production lines, and there is an urgent need for an adjustment solution that is faster-responding, more accurate, and has thickness self-adaptive capabilities. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a rapid adjustment mechanism for inkjet printing position in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rapid inkjet printing position adjustment mechanism includes a printhead, a three-axis adjustment platform, a detection device, and a control system. The printhead is mounted on the three-axis adjustment platform for printing inkjet printing on gypsum board. The three-axis adjustment platform includes an X-axis adjustment module extending along the width direction of the gypsum board, a Z-axis adjustment module extending along the thickness direction of the gypsum board, and a Y-axis adjustment module extending along the conveying direction of the gypsum board. The detection device is used to detect the edge position offset and thickness value of the gypsum board. The control system is electrically connected to the detection device and the three-axis adjustment platform, respectively, and receives the edge position offset signal and thickness value signal output by the detection device, and controls the three-axis adjustment platform to adjust the position of the printhead in the X, Y, and Z axis directions based on the signals.

[0008] As a further embodiment of this utility model: wherein the X-axis adjustment module is an X-axis linear motor, the stator of the X-axis linear motor extends along the X-axis direction, and the nozzle is mounted on the mover seat of the X-axis linear motor through the Y-axis adjustment module and the Z-axis adjustment module.

[0009] As a further embodiment of this utility model: the Y-axis adjustment module is a Y-axis linear motor, the stator of the Y-axis linear motor extends along the Y-axis direction, and the nozzle is disposed on the mover seat of the Y-axis linear motor.

[0010] As a further embodiment of this utility model: the Z-axis adjustment module includes a Z-axis guide rail, a Z-axis slider slidably disposed on the Z-axis guide rail, and a Z-axis drive assembly for driving the Z-axis slider to move, and the nozzle is disposed on the Z-axis slider through the Y-axis adjustment module.

[0011] As a further embodiment of this utility model: the Z-axis drive assembly includes a servo motor and a ball screw, the output shaft of the servo motor is connected to the screw of the ball screw, and the nut seat of the ball screw is connected to the Z-axis slider to drive the Z-axis slider to move along the Z-axis guide rail.

[0012] As a further embodiment of this utility model: the detection device includes a first sensor and a second sensor disposed below the first sensor. The first sensor is used to detect the thickness value of the gypsum board, and the second sensor is used to detect the edge position offset of the gypsum board.

[0013] As a further embodiment of this utility model: the control system includes a PLC controller and a motion control card. The PLC controller receives signals from the detection device and transmits them to the motion control card. The motion control card outputs control commands to the X-axis adjustment module, Y-axis adjustment module and Z-axis adjustment module according to the signals.

[0014] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0015] This invention achieves three-dimensional linkage adjustment of the coding position through the collaborative design of a three-axis adjustment platform, a detection device, and a control system. Specifically, the X, Y, and Z axis adjustment modules move independently along the width, conveying direction, and thickness direction of the gypsum board, respectively, overcoming the limitations of traditional single-axis adjustment and simultaneously compensating for edge offset and thickness variations in the board. The detection device collects position and thickness signals in real time, providing precise data input for adjustment; the control system receives signals and drives the three-axis modules in linkage, shortening the adjustment response time and avoiding mechanical transmission lag problems.

[0016] With the above structure, the printhead of this invention can adapt to the positional changes of gypsum boards of different specifications without requiring manual adjustment during machine downtime, thus improving production continuity. At the same time, the integrated adjustment scheme reduces the accumulation of gaps in mechanical transmission components, improves the stability of the coding position, and meets the requirements for high-precision coding. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the inkjet printing position quick adjustment mechanism in use according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A perspective view of the three-axis adjustment platform described in the embodiment, in its installed state;

[0020] Figure 3 for Figure 2 Exploded view of the three-axis adjustment platform.

[0021] The correspondence between the labels and component names in the attached figures is as follows:

[0022] 1. Mounting base; 2. Nozzle; 3. Three-axis adjustment platform; 31. X-axis adjustment module; 32. Z-axis adjustment module; 321. Z-axis guide rail; 322. Z-axis slider; 323. Z-axis drive assembly; 3231. Servo motor; 3232. Ball screw; 33. Y-axis adjustment module; 4. Detection device; 41. First sensor; 42. Second sensor; 5. Control system; 51. PLC controller; 52. Motion control card; 6. Conveyor belt; 7. Gypsum board; 8. Frame. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figure 1-3In one embodiment of the coding position quick adjustment mechanism provided by this utility model, the coding position quick adjustment mechanism includes a mounting base 1, a printhead 2, a three-axis adjustment platform 3, a detection device 4, and a control system 5. The printhead 2 is mounted on one side of the mounting base 1 via the three-axis adjustment platform 3, so as to be suspended above the conveyor belt 6 to perform coding on the gypsum board 7. The three-axis adjustment platform 3 includes an X-axis adjustment module 31 extending along the width direction of the gypsum board 7, a Z-axis adjustment module 32 extending along the thickness direction of the gypsum board 7, and a Y-axis adjustment module 33 extending along the conveying direction of the gypsum board 7. The detection device 4 is set in front of the mounting base 1 and is located on the frame 8 on both sides of the input end of the conveyor belt 6. It is used to collect the position and thickness signals of the gypsum board 7 in real time. The control system 5 is integrated on the other side of the mounting base 1 and is electrically connected to the detection device 4 and the three-axis adjustment platform 3 via cables. It receives the edge position offset signal and thickness value signal output by the detection device 4 and controls the three-axis adjustment platform 3 to adjust the position of the printhead 2 in the X-axis, Y-axis, and Z-axis directions according to the signals.

[0025] Specifically, the X-axis adjustment module 31 is an X-axis linear motor, using a commercially available linear motor (model LM130 optional, with self-mounted drive seat and guide rail). The stator of the X-axis linear motor is horizontally fixed to the top beam of the mounting base 1 along the width direction (X-axis) of the gypsum board 7. The stroke of the mover is limited (±50mm) at both ends of the stator by limit blocks. The nozzle 2 is set on the drive seat of the X-axis linear motor through the Y-axis adjustment module 33 and the Z-axis adjustment module 32. The response time of the X-axis linear motor is <0.1s, and the positioning accuracy of the drive seat is ±0.01mm, which can compensate for the edge offset of the gypsum board 7 in the width direction in real time.

[0026] Specifically, the Y-axis adjustment module 33 is a Y-axis linear motor, which is a miniature linear motor (model LM100 optional, with its own drive seat and guide rail). The stator of the Y-axis linear motor extends along the conveying direction (Y-axis) of the gypsum board 7, and the nozzle 2 is set on the drive seat of the Y-axis linear motor.

[0027] Specifically, the Z-axis adjustment module 32 includes a Z-axis guide rail 321, a Z-axis slider 322, and a Z-axis drive assembly 323. The Z-axis guide rail 321 is fixedly mounted on the moving part of the X-axis linear motor along the Z-axis direction by screws. The Z-axis slider 322 is slidably disposed within the Z-axis guide rail 321. The Z-axis drive assembly 323 can drive the Z-axis slider 322 to slide along the Z-axis guide rail 321. The nozzle 2 is disposed on the Z-axis slider 322 via the Y-axis adjustment module 33.

[0028] More specifically, the Z-axis drive assembly 323 includes a servo motor 3231 (model 130ST-M06025) and a ball screw 3232. The output shaft of the servo motor 3231 is connected to the screw of the ball screw 3232 via a coupling. One side of the nut seat of the ball screw 3232 is welded and fixed to the Z-axis slider 322, and a mounting plate is welded to the other side of the nut seat. The Y-axis linear motor is fixed to the lower surface of the mounting plate by screws. In use, the servo motor 3231 drives the ball screw 3232 to rotate, causing the nut seat to drive the Z-axis slider 322 to rise and fall along the Z-axis guide rail 321, ensuring a constant distance between the nozzle 2 and the surface of the plasterboard 7.

[0029] Specifically, the detection device 4 includes a first sensor 41 and a second sensor 42, both of which are high-precision laser rangefinders (model HL-G105-SJ) with a sampling frequency of 1kHz. The first sensor 41 is installed on the top of the frame 8, and the laser beam is vertically irradiated onto the upper surface of the gypsum board 7, which, together with the reflector at the bottom of the conveyor belt 6, enables thickness measurement. The second sensor 42 is installed on the side of the frame 8, and the laser beam is obliquely irradiated onto the side of the gypsum board 7, and the edge offset is calculated by the change in the position of the reflected light.

[0030] Specifically, the control system 5 includes a PLC controller 51 (Siemens S7-1214C) and a motion control card 52 (Leica LMC600). The sensor signals from the detection device 4 are converted by the PLC controller 51 and transmitted to the motion control card 52. The motion control card 52 outputs pulse commands to drive the X-axis linear motor, the Y-axis linear motor, and the Z-axis servo motor 3231 to work together. When the offset of the plasterboard 7 is greater than ±0.1mm or the thickness change is greater than ±0.5mm, the system triggers adjustment, and the synchronous response time of each axis is less than 0.2.

[0031] The workflow of this utility model is as follows:

[0032] 1. Signal Acquisition: After the gypsum board 7 enters the detection area, the detection device 4 sends position and thickness signals to the PLC controller 51 in real time;

[0033] 2. Data processing: The PLC controller 51 calculates the X-axis compensation amount ΔX, Y-axis compensation amount ΔY and Z-axis compensation amount ΔZ, and transmits them to the motion control card 52;

[0034] 3. Adjustment: The motion control card 52 drives the sliding of the moving parts of the X-axis linear motor and the Y-axis linear motor, and the rotation of the Z-axis servo motor 3231, thereby driving the nozzle 2 to complete the three-dimensional position calibration;

[0035] 4. Coding execution: After adjustment, the printhead 2 starts coding after a preset delay (linked with the speed of the conveyor belt 6) to ensure that the deviation of the marking position is < ±0.1mm.

[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A rapid adjustment mechanism for inkjet printing position, characterized in that, It includes a nozzle (2), a three-axis adjustment platform (3), a detection device (4), and a control system (5); The nozzle (2) is mounted on the three-axis adjustment platform (3) and is used to print codes on the gypsum board (7); The three-axis adjustment platform (3) includes an X-axis adjustment module (31) extending along the width direction of the gypsum board (7), a Z-axis adjustment module (32) extending along the thickness direction of the gypsum board (7), and a Y-axis adjustment module (33) extending along the conveying direction of the gypsum board (7). The detection device (4) is used to detect the edge position offset and thickness value of the gypsum board (7); The control system (5) is electrically connected to the detection device (4) and the triaxial adjustment platform (3) respectively. It receives the edge position offset signal and thickness value signal output by the detection device (4) and controls the triaxial adjustment platform (3) to adjust the position of the nozzle (2) in the X-axis, Y-axis and Z-axis directions according to the signals.

2. The inkjet printing position quick adjustment mechanism according to claim 1, characterized in that, The X-axis adjustment module (31) is an X-axis linear motor. The stator of the X-axis linear motor extends along the X-axis direction. The nozzle (2) is mounted on the moving part of the X-axis linear motor through the Y-axis adjustment module (33) and the Z-axis adjustment module (32).

3. The inkjet printing position quick adjustment mechanism according to claim 1, characterized in that, The Y-axis adjustment module (33) is a Y-axis linear motor. The stator of the Y-axis linear motor extends along the Y-axis direction, and the nozzle (2) is mounted on the moving part of the Y-axis linear motor.

4. The rapid adjustment mechanism for inkjet printing position according to claim 1, characterized in that, The Z-axis adjustment module (32) includes a Z-axis guide rail (321), a Z-axis slider (322) slidably disposed on the Z-axis guide rail (321), and a Z-axis drive assembly (323) for driving the Z-axis slider (322) to move. The nozzle (2) is disposed on the Z-axis slider (322) through the Y-axis adjustment module (33).

5. The rapid adjustment mechanism for inkjet printing position according to claim 4, characterized in that, The Z-axis drive assembly (323) includes a servo motor (3231) and a ball screw (3232). The output shaft of the servo motor (3231) is connected to the screw of the ball screw (3232). The nut seat of the ball screw (3232) is connected to the Z-axis slider (322) to drive the Z-axis slider (322) to move along the Z-axis guide rail (321).

6. The inkjet printing position quick adjustment mechanism according to claim 1, characterized in that, The detection device (4) includes a first sensor (41) and a second sensor (42) disposed below the first sensor (41). The first sensor (41) is used to detect the thickness value of the gypsum board (7), and the second sensor (42) is used to detect the edge position offset of the gypsum board (7).

7. The rapid adjustment mechanism for inkjet printing position according to claim 1, characterized in that, The control system (5) includes a PLC controller (51) and a motion control card (52). The PLC controller (51) receives the signal from the detection device (4) and transmits it to the motion control card (52). The motion control card (52) outputs control commands to the X-axis adjustment module (31), Y-axis adjustment module (33) and Z-axis adjustment module (32) according to the signal.

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