Ink-jet printing mechanism, control method and ink jet printer

Abstract

The invention relates to the technical field of ink-jet printing, and discloses an ink-jet printing mechanism, a control method and an ink jet printer, and the ink-jet printing mechanism comprises a transmission platform which is provided with a transmission guide belt, and the transmission guide belt sleeves a driving roller and a driven roller; the driving assembly is connected with the driving roller; the driving assembly is used for driving the driving roller to rotate; the compensation assembly is connected with the driven roller; the compensation assembly is used for driving the driven roller to rotate; and the driving assembly is in communication connection with the compensation assembly, so that in the transmission process of the transmission conduction band, the output torque generated by the driving assembly is within a preset range. According to the embodiment of the invention, by arranging the compensation assembly, load compensation can be carried out on the driving assembly according to the actual load variation of the driving assembly, so that the load borne by the driving assembly can be kept stable. Therefore, the transmission guide belt does not generate deformation quantity, so that the color channels can be accurately aligned during color overlapping.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, and in particular to an inkjet printing mechanism, a control method and an inkjet machine. Background Art

[0002] In existing inkjet equipment, there are channels of different colors on the inkjet printing mechanism, and each color channel has a certain spacing. For a position point on the substrate, when the channel transmission guide belt of this point is transmitted to the bottom of the first color channel, the first color is printed. When this point is transmitted to the bottom of the second color channel, the second color is printed, and so on.

[0003] The inkjet printing mechanism is provided with a suction platform. When printing large substrates, the suction platform will adsorb the large substrates on the suction platform, making the large substrates relatively flat. The transmission platform of the inkjet printing mechanism is a transmission guide belt. The transmission guide belt is not a rigid part. When the tension it is subjected to reaches a certain level, it will still be stretched. Therefore, during the printing process, when the large substrate gradually enters the suction platform, the suction area gradually increases. When it reaches a certain position, the combined force of the friction caused by the atmospheric pressure and the transmission traction force will cause the transmission guide belt to begin to stretch and deform. As the large substrate continues to enter the suction platform, the stretching deformation of the transmission guide belt will gradually increase. When all the substrates enter the suction platform, its stretching reaches the maximum.

[0004] Therefore, when the colors of each color channel are superimposed, the deformation of the transmission guide belt causes a travel variable, which makes it impossible for the substrate to be accurately superimposed at the predetermined position, seriously affecting the quality of the printed pattern. Summary of the invention

[0005] In view of this, the present invention provides an inkjet printing mechanism, a control method and an inkjet printer to solve the problem that the printed material cannot be accurately superimposed at a predetermined position.

[0006] In a first aspect, the present invention provides an inkjet printing mechanism, the inkjet printing mechanism comprising:

[0007] The transmission platform is provided with a transmission guide belt, wherein the transmission guide belt is sleeved on the active roller and the passive roller;

[0008] A driving assembly connected to the active roller; the driving assembly is used to drive the active roller to rotate;

[0009] A compensation component connected to the passive roller; the compensation component is used to drive the passive roller to rotate;

[0010] The driving component is communicatively connected with the compensating component so that during the transmission of the transmission belt, the output torque generated by the driving component is within a preset range.

[0011] Beneficial effects: The embodiment of the present invention can compensate the load of the driving component according to the actual load change of the driving component by setting the compensation component, so that the load on the driving component can be maintained stable. In this way, the stable load can prevent the transmission guide belt from generating a deformation amount that changes at any time during the printing process, so that each color channel can be accurately aligned when overlapping colors, thereby ensuring the quality of the printed pattern.

[0012] In an optional embodiment, the drive assembly includes:

[0013] A driving device connected to the active roller;

[0014] A torque sensor is arranged at the output end of the driving device and is used to detect the instantaneous value of the torque generated by the driving device in real time; the torque sensor is communicatively connected with the compensation component.

[0015] In an optional embodiment, the driving device includes:

[0016] A driving motor is provided with a driving shaft;

[0017] a first torque transmission member, wherein one end of the first torque transmission member is connected to the drive shaft, and the other end of the first torque transmission member is connected to the torque sensor;

[0018] A second torque transmission member, one end of which is connected to the torque sensor, and the other end of which is connected to the active roller.

[0019] In an optional embodiment, the driving device further includes:

[0020] A first reducer, one end of which is connected to the output end of the driving device, and the other end of which is connected to the active roller.

[0021] In an optional embodiment, the first reducer includes:

[0022] A reducer, one end of which is connected to the output end of the driving device;

[0023] A torque transmission plate, one end of which is connected to the other end of the reducer, and the other end of which is connected to the active roller.

[0024] In an optional implementation, the compensation component includes:

[0025] A magnetic powder brake is provided with an output shaft; the magnetic powder brake is communicatively connected with the torque sensor;

[0026] A second reducer, one end of which is connected to the output shaft of the magnetic powder brake, and the other end of which is connected to the passive roller.

[0027] In an optional embodiment, the inkjet printing mechanism further includes:

[0028] A suction platform is arranged below the conveying belt; the conveying belt is provided with ventilation holes; the suction platform is suitable for adsorbing the substrate on the conveying belt;

[0029] The operating power of the suction platform is inversely proportional to the area of ​​the substrate entering the transmission guide belt.

[0030] Beneficial effects: The embodiment of the present invention can reduce the warping degree of the substrate by setting the suction platform, so that the entire plane is within the optimal printing distance of the nozzle, and the quality of the pattern is improved. At the same time, the suction platform can flexibly adjust the operating power of the suction platform according to the area of ​​the substrate entering the transmission guide belt, thereby improving the versatility of the suction platform.

[0031] In a second aspect, the present invention further provides a control method for an inkjet printing mechanism, which is applied to the inkjet printing mechanism as described in any of the above embodiments, and the control method comprises:

[0032] Obtaining the actual output torque of the drive component;

[0033] Determining whether the actual output torque exceeds a set torque range;

[0034] If so, the compensation component is started to make the actual output torque within the set torque range, and the driving direction of the compensation component is opposite to that of the driving component.

[0035] In an optional embodiment, when the initial output torque of the driving component is within the set torque range and the compensation component is not started, the driving component is suitable for completely driving the substrate on the transport guide belt.

[0036] In a third aspect, the present invention further provides an inkjet machine, comprising: an inkjet printing mechanism as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1A front view of an inkjet printing mechanism according to an embodiment of the present invention;

[0039] Figure 2 for Figure 1 A top view of the inkjet printing mechanism is shown.

[0040] Description of reference numerals:

[0041] 1. Active roller; 2. Passive roller; 3. Transmission guide belt; 4. Printing material; 5. Suction platform; 6. Driving assembly; 61. Driving device; 611. First torque transmission member; 612. Second torque transmission member; 613. Driving motor; 62. Torque sensor; 63. First reducer; 631. Reducer; 632. Torque transmission disk; 7. Compensation assembly; 71. Magnetic powder brake; 72. Second reducer. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal communication of two components, it can be a wireless connection, or it can be a wired connection. For ordinary workers in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] In the existing inkjet equipment, there are channels of different colors on the inkjet printing mechanism, and each color channel has a certain spacing. For a position point on the printing material 4, when the channel transmission guide belt 3 of this point is transmitted to the bottom of the first color channel, the first color is printed, and when this point is transmitted to the bottom of the second color channel, the second color is printed, and so on.

[0047] The inkjet printing mechanism is provided with a suction platform 5. When printing a large substrate 4, such as a large plate, in the existing inkjet equipment, if the substrate 4 is a material with a certain warping surface, such as a large wooden board, in order to prevent the substrate 4 from colliding with the nozzle, the nozzle needs to be adjusted to a position 2-3 mm away from the highest point of the substrate 4. However, in this case, when the nozzle prints the lowest point of the substrate 4, the height of the nozzle is far away from the printing surface, which is not within the optimal printing distance of the nozzle, and it is easy to have undesirable phenomena such as ink dot dispersion and blurred lines.

[0048] In order to avoid this situation, the inkjet machine that prints this kind of material is generally equipped with a suction platform 5. When the substrate 4 passes through the suction platform 5, there is suction at the bottom of the substrate 4, and pressure is applied thereon through the atmospheric pressure. The suction platform 5 will adsorb the large substrate 4 on the suction platform 5, reduce the degree of warping, make the large substrate 4 relatively flat, and put the entire plane within the optimal printing distance of the nozzle, thereby improving the quality of the pattern.

[0049] However, due to the existence of the suction platform 5, some situations that affect the printing quality will occur when printing large substrates 4. The transmission platform of the inkjet printing mechanism is the transmission guide belt 3, which is not a rigid part. When the tension it is subjected to reaches a certain level, it will still be stretched. Therefore, during the printing process, when the large substrate 4 gradually enters the suction platform 5, the suction area gradually increases. When it reaches a certain position, the combined force of the friction caused by the atmospheric pressure and the transmission traction force will cause the transmission guide belt 3 to begin to stretch and deform. As the large substrate 4 continues to enter the suction platform 5, the stretching deformation of the transmission guide belt 3 will gradually increase. When the substrate 4 enters the suction platform 5 completely, its stretching reaches the maximum. When the large substrate 4 is gradually transported out of the suction platform 5, the stretching of the guide belt gradually recovers from the maximum to the non-stretched state.

[0050] Therefore, when the colors of the color channels are superimposed, the deformation of the transmission guide belt 3 causes a travel variable, so that the substrate 4 cannot be accurately superimposed at the predetermined position, which seriously affects the quality of the printed pattern.

[0051] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0052] According to an embodiment of the present invention, on the one hand, an inkjet printing mechanism is provided. The inkjet printing mechanism includes a transmission platform, a driving component 6 and a compensation component 7.

[0053] Specifically, in an embodiment of the present invention, the transmission platform is provided with a transmission guide belt 3, and the transmission guide belt 3 is sleeved on the active roller 1 and the passive roller 2. In the actual working process, the active roller 1 is started first, and the active roller 1 overcomes the load to make a rotational motion and drive the transmission guide belt 3 to move, and then the transmission guide belt 3 drives the passive roller 2 to rotate. Further, the driving component 6 is connected to the active roller 1, and the driving component 6 is used to drive the active roller 1 to rotate. The compensation component 7 is connected to the passive roller 2, and the compensation component 7 is used to drive the passive roller 2 to rotate. In an embodiment of the present invention, the driving component 6 is communicatively connected with the compensation component 7, so that during the transmission of the transmission guide belt 3, the output torque generated by the driving component 6 is within a preset range. When the output torque is within the preset range, it can ensure that the printing material 4 moves normally on the transmission guide belt 3.

[0054] During operation, the technician can first set an initial output torque for the drive assembly 6. The size of the initial output torque is sufficient to drive the transmission guide belt 3 to carry the large substrate 4 to move. Specifically, when the transmission guide belt 3 is running without load, since there is no load, the initial output torque is far beyond the preset range. Therefore, the compensation component 7 can adjust the braking torque according to the actual output torque of the drive assembly 6, so that the output torque generated by the drive assembly 6 is within the preset range. In this way, when the large substrate 4 begins to gradually enter the transmission platform, the gravity on the transmission guide belt 3 gradually increases, and the load generated by gravity will gradually increase, so the braking torque of the compensation component 7 gradually decreases, so that the output torque generated by the drive assembly 6 is within the preset range.

[0055] When the entire surface of the large printing material 4 is completely on the conveying guide belt 3, the load reaches a peak value, and the braking torque applied by the compensation component 7 is at a minimum value. On the contrary, when the large printing material 4 gradually leaves the conveying guide belt 3, the load will gradually decrease, and the braking torque applied by the compensation component 7 will gradually increase. When the entire surface of the large printing material 4 completely leaves the conveying guide belt 3, the load reaches a minimum value, and the braking torque applied by the compensation component 7 is at a maximum value.

[0056] In this way, the embodiment of the present invention can compensate the load of the driving component 6 according to the actual load variation of the driving component 6 by providing the compensation component 7, so that the load on the driving component 6 can be kept stable. In this way, the stable load can prevent the transmission guide belt 3 from generating a deformation amount that changes at any time during the printing process, so that each color channel can be accurately aligned when overlapping colors, thereby ensuring the quality of the printed pattern.

[0057] It should be noted that, as the size of the large substrate 4 changes as it enters the conveying guide 3, the load applied by the large substrate 4 also changes continuously. The drive assembly 6 needs to maintain a constant output torque throughout the process. Since in this solution, the drive assembly 6 needs to work at a relatively large torque value for a long time, in order to ensure that the drive assembly 6 can work in a normal state, the drive assembly 6 needs to use a relatively large power drive motor 613 or other drive device 61.

[0058] Further, in an optional embodiment, the driving assembly 6 includes a driving device 61 and a driving device 61. Specifically, in the embodiment of the present invention, the driving device 61 is connected to the active roller 1, and a torque sensor 62 is arranged at the output end of the driving device 61 for detecting the instantaneous value of the torque generated by the driving device 61 in real time, and the torque sensor 62 is connected to the compensation assembly 7 in communication.

[0059] Of course, this embodiment is only an example of the torque detection method, but it is not limited to this. Those skilled in the art can make changes according to the actual situation as long as the same technical effect can be achieved.

[0060] Further, in an optional embodiment, the driving device 61 includes a driving motor 613, a first torque transmission member 611 and a second torque transmission member 612. Specifically, in the embodiment of the present invention, the driving motor 613 is provided with a driving shaft, one end of the first torque transmission member 611 is connected to the driving shaft, and the other end of the first torque transmission member 611 is connected to the torque sensor 62. One end of the second torque transmission member 612 is connected to the torque sensor 62, and the other end of the second torque transmission member 612 is connected to the active roller 1. The first torque transmission member 611 and the second torque transmission member 612 are used to transmit driving torque, such as couplings and other structural members.

[0061] Furthermore, in an optional embodiment, the driving device 61 further includes a first reducer 63 , one end of the first reducer 63 is connected to the output end of the driving device 61 , and the other end of the first reducer 63 is connected to the active roller 1 .

[0062] Further, in an optional embodiment, the first reducer 63 includes a reducer 631 and a torque transmission disc 632. Specifically, one end of the reducer 631 is connected to the output end of the driving device 61. One end of the torque transmission disc 632 is connected to the other end of the reducer 631, and the other end of the torque transmission disc 632 is connected to the active roller 1. The reducer 631 is used to amplify the torque, and the torque transmission disc 632 is used to transmit the torque.

[0063] Further, in an optional embodiment, the compensation component 7 includes a magnetic powder brake 71 and a second reducer 72. Specifically, the magnetic powder brake 71 is provided with an output shaft, and the magnetic powder brake 71 is in communication connection with the torque sensor 62. The magnetic powder brake 71 can control the torque generated by controlling the current passing through it, thereby compensating the torque. One end of the second reducer 72 is connected to the output shaft of the magnetic powder brake 71, and the other end of the second reducer 72 is connected to the passive roller 2. The structure of the second reducer 72 is the same as that of the first reducer 63.

[0064] In an optional embodiment, the inkjet printing mechanism also includes a suction platform 5, which is arranged below the conveying guide belt 3. The conveying guide belt 3 is provided with ventilation holes, and the suction platform 5 is suitable for adsorbing the substrate 4 on the conveying guide belt 3.

[0065] Specifically, in actual application, when the large printing material 4 begins to gradually enter the suction platform 5, the load generated by the atmospheric pressure will gradually increase, and the gravity of the large printing material 4 on the conveying guide belt 3 will gradually increase. At this time, through the feedback of the torque value and the control of the input current, the braking torque applied by the magnetic powder brake 71 will gradually decrease. When the entire surface of the large printing material 4 is completely covered in the suction area, that is, when the entire surface of the large printing material 4 is completely covered on the conveying guide belt 3, at this time, the load generated by the atmospheric pressure and gravity reaches a peak value, and the braking torque applied by the magnetic powder brake 71 is the minimum value. On the contrary, when the large printing material 4 gradually leaves the suction platform 5, the load generated by the atmospheric pressure and gravity will gradually decrease. At this time, through the feedback of the torque value and the control of the input current, the braking torque applied by the magnetic powder brake 71 will gradually increase. When the entire surface of the large printing material 4 completely leaves the suction area, that is, when the entire surface of the large printing material 4 completely leaves the conveying guide belt 3, at this time, the load generated by atmospheric pressure and gravity reaches the minimum value, and the braking torque applied by the magnetic powder brake 71 is the maximum value.

[0066] Furthermore, the operating power of the suction platform 5 is inversely proportional to the area of ​​the substrate 4 entering the transmission guide belt 3. When the substrate 4 first enters the suction platform 5, the number of ventilation holes on the transmission guide belt 3 blocked by the substrate 4 is small. Therefore, in order to generate a larger vacuum degree on the suction platform 5 so as to generate a larger atmospheric pressure above the substrate 4, the fan of the suction platform 5 needs to operate at the maximum frequency. Then, when the substrate 4 continues to enter the suction platform 5, the number of ventilation holes blocked by it increases. At this time, the vacuum degree generated on the suction platform 5 is sufficient, so the operating power of the suction platform 5 can also be reduced. Similarly, when the substrate 4 gradually leaves the suction platform 5, the operating power of the suction platform 5 needs to be gradually increased. Of course, the operating frequency of the suction platform 5 can also be controlled to increase the operating power and reduce the operating power.

[0067] For specific adjustment points, the number of blocked ventilation holes can be detected, and the distance of the printing material 4 entering the suction platform 5 or the transmission guide belt 3 can be detected. When the preset number or the preset distance value is reached, the operating power of the suction platform 5 is adjusted.

[0068] The adjustment method can be: the operating power is first maximum, and when the substrate 4 enters a certain distance, the frequency is reduced. When the substrate 4 completely enters the suction area, the frequency is the lowest value. When the substrate 4 leaves the suction area, the frequency value gradually increases.

[0069] In this way, the embodiment of the present invention can reduce the warping degree of the substrate 4 by providing the suction platform 5, so that the entire plane is within the optimal printing distance of the nozzle, thereby improving the quality of the pattern. At the same time, the suction platform 5 can flexibly adjust the operating power of the suction platform 5 according to the area of ​​the substrate 4 entering the transmission guide 3, thereby improving the versatility of the suction platform 5.

[0070] In a second aspect, the present invention further provides a control method for an inkjet printing mechanism, which is applied to the inkjet printing mechanism as described in any of the above embodiments, and the control method comprises:

[0071] S1. Obtaining the actual output torque of the driving assembly 6; please refer to the above embodiment for details, which will not be repeated here;

[0072] S2. Determine whether the actual output torque exceeds the set torque range; please refer to the above embodiment for details, which will not be described here;

[0073] S3. If yes, start the compensation component 7 to make the actual output torque within the set torque range. The driving directions of the compensation component 7 and the driving component 6 are opposite. Please refer to the above embodiment for details, which will not be repeated here.

[0074] In an optional embodiment, when the initial output torque of the driving component 6 is within the set torque range and the compensation component 7 is not started, the driving component 6 is suitable for completely driving the substrate 4 on the transport guide belt 3 .

[0075] In a third aspect, the present invention further provides an inkjet machine, comprising: an inkjet printing mechanism as described in any of the above embodiments.

[0076] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An inkjet printing mechanism, characterized in that: include: The transmission platform is provided with a transmission guide belt (3), wherein the transmission guide belt (3) is sleeved on the active roller (1) and the passive roller (2); A driving assembly (6) connected to the active roller (1); the driving assembly (6) is used to drive the active roller (1) to rotate; A compensation component (7) connected to the passive roller (2); the compensation component (7) is used to drive the passive roller (2) to rotate; The driving component (6) is communicatively connected with the compensating component (7) so that during the transmission process of the transmission belt (3), the output torque generated by the driving component (6) is within a preset range.

2. The inkjet printing mechanism according to claim 1, characterized in that: The driving assembly (6) comprises: A driving device (61) connected to the active roller (1); A torque sensor (62) is arranged at the output end of the driving device (61) and is used to detect in real time the instantaneous value of the torque generated by the driving device (61); the torque sensor (62) is communicatively connected to the compensation component (7).

3. The inkjet printing mechanism according to claim 2, characterized in that: The driving device (61) comprises: A driving motor (613) is provided with a driving shaft; a first torque transmission member (611), one end of the first torque transmission member (611) being connected to the drive shaft, and the other end of the first torque transmission member (611) being connected to the torque sensor (62); A second torque transmission member (612), one end of the second torque transmission member (612) is connected to the torque sensor (62), and the other end of the second torque transmission member (612) is connected to the active roller (1).

4. The inkjet printing mechanism according to claim 3, characterized in that: The driving device (61) further comprises: A first reducer (63), one end of the first reducer (63) is connected to the output end of the driving device (61), and the other end of the first reducer (63) is connected to the active roller (1).

5. The inkjet printing mechanism according to claim 4, characterized in that: The first reducer (63) comprises: A reducer (631), one end of the reducer (631) being connected to an output end of the driving device (61); A torque transmission disc (632), one end of the torque transmission disc (632) is connected to the other end of the reducer (631), and the other end of the torque transmission disc (632) is connected to the active roller (1).

6. The inkjet printing mechanism according to any one of claims 2 to 5, characterized in that: The compensation component (7) comprises: A magnetic powder brake (71) is provided with an output shaft; the magnetic powder brake (71) is communicatively connected with the torque sensor (62); A second reducer (72), one end of the second reducer (72) is connected to the output shaft of the magnetic powder brake (71), and the other end of the second reducer (72) is connected to the passive roller (2).

7. The inkjet printing mechanism according to any one of claims 1 to 5, characterized in that: Also includes: An air suction platform (5) is arranged below the conveying guide belt (3); the conveying guide belt (3) is provided with ventilation holes; the air suction platform (5) is suitable for adsorbing the printing material (4) on the conveying guide belt (3); The operating power of the suction platform (5) is inversely proportional to the area of ​​the printing material (4) entering the transmission guide belt (3).

8. A control method for an inkjet printing mechanism, characterized in that: Applied to the inkjet printing mechanism according to any one of claims 1 to 7, the control method comprises: Obtaining the actual output torque of the driving component (6); Determining whether the actual output torque exceeds a set torque range; If so, the compensation component (7) is started to make the actual output torque within the set torque range, and the driving direction of the compensation component (7) is opposite to that of the driving component (6).

9. The control method according to claim 8, characterized in that: When the initial output torque of the driving component (6) is within the set torque range and the compensation component (7) is not started, the driving component (6) is suitable for fully driving the substrate (4) on the transport guide belt (3).

10. An inkjet printer, characterized in that: include: An inkjet printing mechanism as claimed in any one of claims 1 to 7.

Images