Ink jet air suction printing mechanism and ink jet machine

Abstract

The invention relates to the technical field of ink-jet printing, and discloses an ink-jet air suction printing mechanism and an ink jet printer, and the ink-jet air suction printing mechanism comprises a transmission platform which is provided with a transmission guide belt which sleeves a driving roller and a driven roller; the air suction platform is arranged below the transmission guide belt; ventilation holes are formed in the transmission guide belt; the air suction platform is suitable for adsorbing a printing stock on the transmission guide belt; the ink jet assembly is arranged above the transmission platform; the lengths of the portions, located on the two sides of the ink jetting assembly, of the conveying platform are both not smaller than the maximum length of a printing stock. The detection switch is arranged on one side, close to the upstream of the transmission platform, of the ink jet assembly; the detection switch is in communication connection with the ink jet assembly; and after the printed material triggers the detection switch, the ink jet assembly is started. According to the invention, the deformation quantity of the transmission guide belt is not changed, so that accurate color overlapping alignment can be realized, and the quality of printed patterns is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printing, and in particular to an inkjet air suction printing mechanism and an inkjet machine. Background Art

[0002] In the existing inkjet equipment, there are channels of different colors on the inkjet suction printing mechanism, and each color channel has a certain spacing. For a position point on the printing material, 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 suction 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 suction 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 force 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, so that the substrate cannot be accurately superimposed at the predetermined position, which seriously affects the quality of the printed pattern. Summary of the invention

[0005] In view of this, the present invention provides an inkjet air suction printing mechanism 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 air suction printing mechanism, the inkjet air suction 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 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;

[0009] An inkjet assembly is arranged above the transmission platform; the length of the transmission platform on both sides of the inkjet assembly is not less than the maximum length of the substrate;

[0010] A detection switch is arranged on a side of the inkjet assembly close to the upstream of the transmission platform; the detection switch is in communication connection with the inkjet assembly; after the substrate triggers the detection switch, the inkjet assembly is started.

[0011] Beneficial effect: The embodiment of the present invention can reduce the warping degree of the substrate by setting up a suction platform, 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 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. In addition, since the lengths of the two side parts of the transmission platform located on the inkjet assembly are not less than the maximum length of the substrate, in the subsequent transmission and printing process, since the area of ​​the substrate in the suction area remains unchanged, the force on the transmission guide belt remains unchanged, and the deformation of the transmission guide belt does not change, so accurate color overlay alignment can be achieved, ensuring the quality of the printed pattern.

[0012] In an optional embodiment, L≥2*X1+X2+X3;

[0013] Among them, L is the length of the overall suction area of ​​the suction platform; X1 is the maximum length of the substrate; X2 is the distance between the detection switch and the side of the inkjet component close to the upstream of the transmission platform; X3 is the inkjet interval of the inkjet component.

[0014] In an optional embodiment, during the reaction time from when the inkjet assembly receives a print trigger signal to when printing starts, the distance the transport guide belt runs is less than or equal to the distance between the detection switch and the side of the inkjet assembly close to the upstream of the transport platform.

[0015] In an optional embodiment, during the reaction time from when the inkjet assembly receives a print trigger signal to when printing starts, the distance that the transport guide belt runs at the maximum operating speed is less than or equal to the distance between the detection switch and the side of the inkjet assembly close to the upstream of the transport platform.

[0016] In an optional embodiment, along the transport direction of the transport guide, the inkjet interval is related to the number of color channels in the inkjet assembly.

[0017] In an optional embodiment, along the transport direction of the transport guide, the inkjet interval is related to the distance between two adjacent color channels in the inkjet assembly.

[0018] In an optional embodiment, along the transport direction of the transport guide, the inkjet interval is related to the number of color channels in the inkjet assembly and the distance between two adjacent color channels.

[0019] In an optional implementation, the detection switch is a photoelectric induction switch.

[0020] In an optional embodiment, the entire suction platform only uses the transmission guide belt, and the transmission guide belt only uses the active roller and the passive roller for transmission.

[0021] In a second aspect, the present invention further provides an inkjet machine, which includes: an inkjet air suction printing mechanism as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a front view of an inkjet air suction printing mechanism according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of various parameters shown.

[0025] Description of reference numerals:

[0026] 1. Active roller; 2. Passive roller; 3. Transmission guide belt; 4. Printing material; 5. Suction platform; 6. Detection switch; 7. Inkjet assembly. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] In the existing inkjet equipment, there are channels of different colors on the inkjet suction 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.

[0032] The inkjet suction 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 line blur.

[0033] 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.

[0034] 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 suction printing mechanism is the transmission guide belt 3. The transmission guide belt 3 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.

[0035] 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.

[0036] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0037] According to an embodiment of the present invention, on the one hand, an inkjet suction printing mechanism is provided, which includes a transmission platform, a suction platform 5, an inkjet component 7 and a detection switch 6.

[0038] Specifically, in the 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 rotate and drive the transmission guide belt 3 to move, and then the transmission guide belt 3 drives the passive roller 2 to rotate.

[0039] Furthermore, the suction platform 5 is arranged below the conveying guide 3, and the conveying guide 3 is provided with ventilation holes, and the suction platform 5 is suitable for adsorbing the substrate 4 on the conveying guide 3. The embodiment of the present invention can reduce the warping degree of the substrate 4 by arranging 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 conveying guide 3, thereby improving the versatility of the suction platform 5.

[0040] Furthermore, the inkjet assembly 7 is arranged above the transmission platform, and when the substrate 4 passes through the bottom of the inkjet assembly 7 under the conveying action of the transmission platform, the inkjet assembly 7 can perform inkjet printing on the substrate 4. At the same time, the length of the two side parts of the transmission platform located on the inkjet assembly 7 is not less than the maximum length of the substrate 4. In this way, when only a part of the substrate 4 enters the transmission platform, as the substrate 4 gradually enters the transmission platform, the deformation of the transmission guide belt 3 gradually increases. When the substrate 4 completely enters the transmission platform, the deformation of the transmission guide belt 3 reaches the maximum. Since the length of the two side parts of the transmission platform located on the inkjet assembly 7 is not less than the maximum length of the substrate 4, before printing the substrate 4, the force on the transmission guide belt 3 remains unchanged, and the deformation of the transmission guide belt 3 does not change, so accurate color stacking and alignment can be achieved.

[0041] Further, in the embodiment of the present invention, the detection switch 6 is disposed on the side of the inkjet assembly 7 close to the upstream of the transmission platform, and the detection switch 6 is in communication connection with the inkjet assembly 7. After the substrate 4 triggers the detection switch 6, the inkjet assembly 7 is started. In this way, the inkjet printing process can be automatically triggered.

[0042] In such a configuration, since the length of the two side parts of the transmission platform located at the inkjet assembly 7 is not less than the maximum length of the substrate 4, in the subsequent transmission and printing process, since the area of ​​the substrate 4 in the air suction area remains unchanged, the force on the transmission guide belt 3 remains unchanged, and the deformation of the transmission guide belt 3 does not change, so accurate color stacking and alignment can be achieved, ensuring the quality of the printed pattern. When the tail end of the substrate 4 is printed after the last color channel of the inkjet assembly 7 is printed, since the pattern on the entire board has been printed, although the deformation of the transmission guide belt 3 will gradually decrease as the air suction area decreases when the substrate 4 gradually leaves the air suction platform 5, it no longer affects the quality of the printed pattern.

[0043] In an optional embodiment, L≥2*X1+X2+X3;

[0044] Among them, Figure 2 As shown, L is the length of the overall suction area of ​​the suction platform 5; X1 is the maximum length of the substrate 4; X2 is the distance from the detection switch 6 to the side of the inkjet component 7 close to the upstream of the transmission platform; X2 also satisfies X2≥Vmax*Tmax, Vmax is the maximum operating speed of the transmission guide belt 3, Tmax is the maximum reaction time of the detection switch 6 after receiving the printing trigger signal, starting to calculate and finally outputting to the inkjet component 7; X3 is the inkjet interval of the inkjet component 7.

[0045] Such an arrangement can ensure that the substrate 4 is completely on the transmission platform before, during and after printing, so that the deformation of the transmission guide belt 3 does not change during the printing process, thereby achieving accurate color overlay and alignment, ensuring the quality of the printed pattern.

[0046] In an optional embodiment, during the reaction time from when the inkjet assembly 7 receives the print trigger signal to when printing starts, the distance that the transmission guide belt 3 runs is less than or equal to the distance between the detection switch 6 and the side of the inkjet assembly 7 close to the upstream of the transmission platform. That is to say, after the substrate 4 triggers the detection switch 6, the printing software in the inkjet assembly 7 has a certain reaction time in the process of receiving the signal and in the process of starting printing after receiving the signal. Therefore, after the reaction time, the inkjet assembly 7 starts to start inkjet printing. In this case, it is necessary that during the reaction time, the distance that the transmission guide belt 3 runs is less than or equal to the distance between the detection switch 6 and the side of the inkjet assembly 7 close to the upstream of the transmission platform, because only in this way can the accurate color overlap alignment be guaranteed as much as possible, and the quality of the printed pattern can be guaranteed. Otherwise, if the distance that the transmission guide belt 3 runs is greater than the distance between the detection switch 6 and the side of the inkjet assembly 7 close to the upstream of the transmission platform, the inkjet position will be delayed, thereby causing the inkjet to be misplaced, affecting the printing quality.

[0047] In an optional embodiment, during the reaction time from when the inkjet assembly 7 receives the print trigger signal to when printing starts, the distance that the transmission guide belt 3 runs at the maximum running speed is less than or equal to the distance between the detection switch 6 and the side of the inkjet assembly 7 close to the upstream of the transmission platform. Since during the reaction time, when the transmission guide belt 3 runs at the maximum running speed, the distance that it runs is less than or equal to the distance between the detection switch 6 and the side of the inkjet assembly 7 close to the upstream of the transmission platform, when the transmission guide belt 3 runs at a normal speed, the ink will never be misplaced, so that the color overlap and alignment can be accurately performed, thereby ensuring the quality of the printed pattern.

[0048] In an optional embodiment, along the transmission direction of the transmission guide 3, the inkjet interval is related to the number of color channels in the inkjet assembly 7. Specifically, in the embodiment of the present invention, since the multiple color channels in the inkjet assembly 7 are arranged along the transmission direction of the transmission guide 3, when setting the inkjet interval, it is necessary to make the inkjet interval correspond to the number of color channels in the inkjet assembly 7. For example, four color channels can be set, and the inkjet interval can be adjusted between 3 meters and 5 meters. Of course, this embodiment is only an example of the number of color channels and the length of the inkjet interval, but it is not limited to this. Those skilled in the art can make changes according to actual conditions, as long as the same technical effect can be achieved.

[0049] In an optional embodiment, along the transmission direction of the transmission guide 3, the inkjet interval is related to the distance between two adjacent color channels in the inkjet assembly 7. Further, in the embodiment of the present invention, when setting multiple color channels in the inkjet assembly 7, in order to prevent the problem of color cross-talk during spraying of multiple color channels, those skilled in the art can adjust the distance between the multiple color channels according to actual conditions. In this case, when setting the inkjet interval, it is necessary to consider the distance between two adjacent color channels.

[0050] For example, four color channels can be set, the distance between two adjacent color channels can be set between 30 cm and 50 cm, and the inkjet interval can be adjusted between 4 m and 6 m. Of course, this embodiment is only an example of the distance between two adjacent color channels, but it is not limited to this. Those skilled in the art can change it according to the actual situation as long as the same technical effect can be achieved.

[0051] In an optional embodiment, along the transmission direction of the transmission guide 3, the inkjet interval is related to the number of color channels in the inkjet assembly 7 and the distance between two adjacent color channels. Further, those skilled in the art can take into account the number of color channels and the distance between two adjacent color channels when setting the inkjet interval, which can more fully meet the actual working conditions.

[0052] In an optional embodiment, the detection switch 6 is a photoelectric induction switch. Of course, this embodiment is only an example of the detection switch 6, but it is not limited to this. Those skilled in the art can change it according to actual conditions. For example, it can be a mechanical touch switch or an electromagnetic switch, as long as it can achieve the same technical effect.

[0053] In an optional embodiment, the entire suction platform 5 only uses the transmission guide belt 3, and the transmission guide belt 3 is only driven by the active roller 1 and the passive roller 2. In this way, the versatility of the transmission device as a whole is improved, and no separate setting is required, thereby saving a certain amount of production cost.

[0054] In a second aspect, the present invention further provides an inkjet machine, which includes: an inkjet air suction printing mechanism as described in any of the above embodiments.

[0055] 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 air suction 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); 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); An inkjet assembly (7) is arranged above the transmission platform; The lengths of the two sides of the transmission platform located on the inkjet assembly (7) are not less than the maximum length of the substrate (4); A detection switch (6) is arranged on a side of the inkjet assembly (7) close to the upstream of the transmission platform; the detection switch (6) is connected to the inkjet assembly (7) for communication; after the printing material (4) triggers the detection switch (6), the inkjet assembly (7) is started.

2. The inkjet air suction printing mechanism according to claim 1, characterized in that: L ≥ 2*X1+X2+X3; Wherein, L is the length of the entire suction area of ​​the suction platform (5); X1 is the maximum length of the substrate (4); X2 is the distance between the detection switch (6) and the side of the inkjet component (7) close to the upstream of the transmission platform; and X3 is the inkjet interval of the inkjet component (7).

3. The inkjet air suction printing mechanism according to claim 2, characterized in that: During the reaction time from when the inkjet assembly (7) receives a printing trigger signal to when printing starts, the distance traveled by the transmission guide belt (3) is less than or equal to the distance between the detection switch (6) and the side of the inkjet assembly (7) close to the upstream of the transmission platform.

4. The inkjet air suction printing mechanism according to claim 3, characterized in that: During the reaction time from when the inkjet assembly (7) receives a printing trigger signal to when printing starts, the distance that the transport guide belt (3) runs at the maximum running speed is less than or equal to the distance between the detection switch (6) and the side of the inkjet assembly (7) close to the upstream of the transport platform.

5. The inkjet air suction printing mechanism according to any one of claims 2 to 4, characterized in that: Along the transport direction of the transport guide (3), the inkjet interval is related to the number of color channels in the inkjet assembly (7).

6. The inkjet air suction printing mechanism according to any one of claims 2 to 4, characterized in that: Along the transport direction of the transport guide belt (3), the inkjet interval is related to the distance between two adjacent color channels in the inkjet assembly (7).

7. The inkjet air suction printing mechanism according to any one of claims 2 to 4, characterized in that: Along the transport direction of the transport guide belt (3), the inkjet interval is related to the number of color channels in the inkjet assembly (7) and the distance between two adjacent color channels.

8. The inkjet air suction printing mechanism according to any one of claims 1 to 4, characterized in that: The detection switch (6) is a photoelectric induction switch.

9. The inkjet air suction printing mechanism according to any one of claims 1 to 4, characterized in that: The entire air suction platform (5) uses only the transmission guide belt (3), and the transmission guide belt (3) uses only the active roller (1) and the passive roller (2) for transmission.

10. An inkjet printer, characterized in that: include: An inkjet air suction printing mechanism as claimed in any one of claims 1 to 9.

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