A piezoelectric inkjet digital printing machine

Abstract

The present invention relates to the field of printing technology, and discloses a piezoelectric inkjet digital printer, comprising: an unwinding mechanism, a rewinding mechanism, a traction mechanism, a printing mechanism and a temporary storage mechanism, wherein the traction mechanism drives the substrate to move from the unwinding mechanism to the rewinding mechanism and form a substrate path; the printing mechanism is arranged on the substrate path; the temporary storage mechanism comprises a first temporary storage roller and a second temporary storage roller, wherein the first temporary storage roller is arranged on the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller is arranged on the substrate path between the printing mechanism and the rewinding mechanism. By arranging the temporary storage mechanism, it is ensured that the piezoelectric inkjet digital printer does not stop when printing is performed, and the servo motors of the unwinding mechanism, the rewinding mechanism and the driving roller continue to work, so as to avoid the unwinding mechanism, the rewinding mechanism or the driving roller from accidentally rotating due to the action of the substrate, and the substrate will not move on the printing table, thereby reducing the risk of dislocation of the printing pattern and reducing the impact on the overall clarity of the final image.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, in particular to a piezoelectric inkjet digital printer. Background Art

[0002] Currently, during the printing process of a piezoelectric inkjet digital printer, the substrate, serving as the printing material, remains on the printing table, and the printing mechanism repeatedly reciprocates over the substrate in the printing position to achieve printing. However, since the substrate needs to remain on the printing table, the servo motors connected to the unwinding mechanism, rewinding mechanism, and drive roller on the piezoelectric inkjet digital printer stop working. There is a risk that the unwinding mechanism, rewinding mechanism, or drive roller will accidentally rotate due to the influence of the substrate. This can cause the substrate to move on the printing table, resulting in misalignment of the printed pattern and affecting the overall clarity of the final image. Summary of the Invention

[0003] The purpose of the present invention is to provide a piezoelectric inkjet digital printer that reduces the risk of misalignment of printed patterns and reduces the impact on the overall clarity of the final image.

[0004] To achieve the above-mentioned objectives, the present invention provides a piezoelectric inkjet digital printing machine, comprising: an unwinding mechanism, a rewinding mechanism, and a traction mechanism for driving a substrate to move from the unwinding mechanism to the rewinding mechanism and form a substrate path; a printing mechanism, which is arranged on the substrate path; a temporary storage mechanism, which comprises a first temporary storage roller and a second temporary storage roller, the first temporary storage roller being arranged on the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller being arranged on the substrate path between the printing mechanism and the rewinding mechanism, the first temporary storage roller being capable of lengthening the substrate path between the unwinding mechanism and the printing mechanism, while the second temporary storage roller being capable of shortening the substrate path between the printing mechanism and the rewinding mechanism, or the first temporary storage roller being capable of shortening the substrate path between the unwinding mechanism and the printing mechanism, while the second temporary storage roller being capable of lengthening the substrate path between the printing mechanism and the rewinding mechanism.

[0005] Optionally, the piezoelectric inkjet digital printing machine further includes a frame, and the unwinding mechanism, the rewinding mechanism, the traction mechanism, the printing mechanism and the temporary storage mechanism are all arranged on the frame.

[0006] Optionally, the temporary storage mechanism further includes a base, the first temporary storage roller and the second temporary storage roller are both arranged on the base, and the base can move on the frame.

[0007] Optionally, the temporary storage mechanism further includes a driving mechanism, and the driving mechanism can drive the base to perform reciprocating motion along a straight line.

[0008] Optionally, the piezoelectric inkjet digital printer further includes a controller, which is electrically connected to the unwinding mechanism, the rewinding mechanism, the traction mechanism, the printing mechanism and the driving mechanism respectively.

[0009] Optionally, the piezoelectric inkjet digital printing machine further includes a detection mechanism, which is disposed on the substrate path between the second temporary storage roller and the unwinding mechanism, and is also electrically connected to the controller.

[0010] Optionally, the piezoelectric inkjet digital printing machine further includes an operating table, which is arranged on the substrate path between the detection mechanism and the unwinding mechanism.

[0011] Optionally, the piezoelectric inkjet digital printing machine further includes a plurality of guide rollers, wherein the guide rollers are arranged on the frame and along the substrate path.

[0012] Optionally, the piezoelectric inkjet digital printing machine further includes a deflection correction mechanism, which is disposed on the frame and located on the substrate path between the unwinding mechanism and the first temporary storage roller.

[0013] Optionally, the piezoelectric inkjet digital printer further includes a curing mechanism, which is disposed on the frame and located on the substrate path between the printing mechanism and the second temporary storage roller.

[0014] The embodiment of the present invention provides a piezoelectric inkjet digital printer, which has the following advantages compared with the prior art:

[0015] A piezoelectric inkjet digital printer according to an embodiment of the present invention includes: an unwinding mechanism, a rewinding mechanism, a traction mechanism, a printing mechanism and a temporary storage mechanism, wherein the traction mechanism drives the substrate to move from the unwinding mechanism to the rewinding mechanism and form a substrate path; the printing mechanism is arranged on the substrate path; the temporary storage mechanism includes a first temporary storage roller and a second temporary storage roller, wherein the first temporary storage roller is arranged on the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller is arranged on the substrate path between the printing mechanism and the rewinding mechanism, the first temporary storage roller can lengthen the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller can shorten the substrate path between the printing mechanism and the rewinding mechanism, or the first temporary storage roller can shorten the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller can lengthen the substrate path between the printing mechanism and the rewinding mechanism. By providing a temporary storage mechanism, the substrate at the printing station of the printing mechanism stops moving while the printing mechanism is printing, but the unwinding mechanism, rewinding mechanism, traction mechanism, and temporary storage mechanism continue to operate. The first temporary storage roller lengthens the substrate path between the unwinding mechanism and the printing mechanism, thereby temporarily storing the substrate before the printing station on the first temporary storage roller, while the second temporary storage roller shortens the substrate path between the printing mechanism and the rewinding mechanism. The substrate after the printing station is continuously fed to the rewinding mechanism, ensuring the normal operation of the unwinding mechanism, the rewinding mechanism, traction mechanism, and temporary storage mechanism. When printing is completed, the substrate at the printing station of the printing mechanism moves along the substrate path. At this time, the first temporary storage roller shortens the substrate path between the unwinding mechanism and the printing mechanism, releasing the substrate temporarily stored by the first temporary storage roller. The second temporary storage roller lengthens the substrate path between the printing mechanism and the rewinding mechanism, and the second temporary storage roller begins to temporarily store the printed substrate, preparing for the normal operation of the rewinding mechanism. This setting ensures that the piezoelectric inkjet digital printing machine does not stop when printing, and the servo motors of the unwinding mechanism, rewinding mechanism and drive roller continue to work, avoiding accidental rotation of the unwinding mechanism, rewinding mechanism or drive roller due to the action of the substrate, and the substrate will not move on the printing table, reducing the risk of misalignment of the printed pattern and reducing the impact on the overall clarity of the final image. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0017] Figure 2 It is a partial structural diagram of an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of a substrate path according to an embodiment of the present invention.

[0019] Figure 4 It is a structural diagram of the temporary storage mechanism of an embodiment of the present invention.

[0020] In the figure, 1. unwinding mechanism; 2. rewinding mechanism; 3. traction mechanism; 4. substrate path; 5. printing mechanism; 6. temporary storage mechanism; 7. frame; 8. controller; 9. detection mechanism; 10. operating table; 11. guide roller; 12. deviation correction mechanism; 13. curing mechanism; 14. first temporary storage roller; 15. second temporary storage roller; 16. base; 17. driving mechanism. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0025] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1-2 As shown, a piezoelectric inkjet digital printer according to a preferred embodiment of the present invention includes: an unwinding mechanism 1, a rewinding mechanism 2, a traction mechanism 3, a printing mechanism 5 and a temporary storage mechanism 6.

[0027] The traction mechanism 3 drives the substrate to move from the unwinding mechanism 1 to the rewinding mechanism 2 and form a substrate path 4. The substrate roll is placed on the unwinding mechanism 1, and the substrate of the substrate roll moves along the substrate path 4 and is finally rewound by the rewinding mechanism 2. Figure 3 The traction mechanism 3 of the present application is configured as two traction rollers, which are respectively arranged on the substrate path 4 before and after the printing mechanism 5 .

[0028] The printing mechanism 5 is disposed on the substrate path 4. After being printed by the printing mechanism 5, the substrate is reeled up by the reeling mechanism 2. The printing mechanism 5 is a piezoelectric printhead. To minimize the impact on the overall clarity of the final image, the printing mechanism 5 can be equipped with multiple printheads. The printing mechanism 5 completes the printing operation with a single reciprocating motion, reducing the system factors that may affect the final image.

[0029] Temporary storage unit 6, please refer to Figure 3 and Figure 4 It includes a first temporary storage roller 14 and a second temporary storage roller 15. The first temporary storage roller 14 is arranged on the substrate path 4 between the unwinding mechanism 1 and the printing mechanism 5, and the second temporary storage roller 15 is arranged on the substrate path 4 between the printing mechanism 5 and the winding mechanism 2. The first temporary storage roller 14 can lengthen the substrate path 4 between the unwinding mechanism 1 and the printing mechanism 5, and at the same time, the second temporary storage roller 15 can shorten the substrate path 4 between the printing mechanism 5 and the winding mechanism 2, or the first temporary storage roller 14 can shorten the substrate path 4 between the unwinding mechanism 1 and the printing mechanism 5, and at the same time, the second temporary storage roller 15 can lengthen the substrate path 4 between the printing mechanism 5 and the winding mechanism 2. By setting up the temporary storage mechanism 6, it can be ensured that the unwinding mechanism 1, the rewinding mechanism 2, and the traction mechanism 3 can work without stopping, and the servo motors of the unwinding mechanism 1, the rewinding mechanism 2 and the driving roller continue to work, thereby avoiding accidental rotation of the unwinding mechanism 1, the rewinding mechanism 2 or the driving roller due to the action of the substrate, and the substrate will not move on the printing table, reducing the risk of misalignment of the printed pattern and reducing the impact on the overall clarity of the final image.

[0030] When the printing mechanism 5 is printing, the substrate at the printing station of the printing mechanism 5 stops moving, but the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3 and the temporary storage mechanism 6 continue to work. The unwinding mechanism 1 continues to unwind the substrate, and the first temporary storage roller 14 lengthens the substrate path 4 between the unwinding mechanism 1 and the printing mechanism 5, thereby temporarily storing the substrate continued to be unwound by the unwinding mechanism 1 on the first temporary storage roller 14, and the second temporary storage roller 15 shortens the substrate path 4 between the printing mechanism 5 and the rewinding mechanism 2. The substrate after the printing station is continuously unwound to the rewinding mechanism 2, ensuring the normal operation of the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3 and the temporary storage mechanism 6. When printing is completed or has not yet started, the substrate at the printing station of the printing mechanism 5 moves on the substrate path 4. At this time, the first temporary storage roller 14 shortens the substrate path 4 between the unwinding mechanism 1 and the printing mechanism 5, and the substrate temporarily stored by the first temporary storage roller 14 is released, while the second temporary storage roller 15 lengthens the substrate path 4 between the printing mechanism 5 and the winding mechanism 2. The second temporary storage roller 15 starts to temporarily store the printed substrate to prepare for the subsequent normal operation of the winding mechanism 2.

[0031] The piezoelectric inkjet digital printer of this embodiment also includes a frame 7, on which the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3, the printing mechanism 5, and the temporary storage mechanism 6 are all mounted. The frame 7 supports and mounts the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3, the printing mechanism 5, and the temporary storage mechanism 6. The frame 7 also includes a plurality of guide rollers 11, which are mounted on the frame 7 and arranged along the substrate path 4. The guide rollers 11 guide the substrate along the substrate path 4.

[0032] In this embodiment, the temporary storage mechanism 6 further includes a base 16, on which a first temporary storage roller 14 and a second temporary storage roller 15 are both disposed. The base 16 is movable on the frame 7. When the base 16 moves, the first temporary storage roller 14 and the second temporary storage roller 15 respectively cooperate with their corresponding guide rollers 11. The guide rollers 11 remain stationary, while the distances between the first temporary storage roller 14 and the second temporary storage roller 15 and their corresponding guide rollers 11 change. This either lengthens the substrate path 4 between the base 16 and the unwinding mechanism 1 while shortening the substrate path 4 between the rewinding mechanism 2 and the base 16, or shortens the substrate path 4 between the base 16 and the unwinding mechanism 1 while lengthening the substrate path 4 between the printing mechanism 5 and the rewinding mechanism 2. In this embodiment, the temporary storage mechanism 6 further includes a drive mechanism 17, which is capable of driving the base 16 to reciprocate along a straight line. The driving mechanism 17 can realize the reciprocating motion of the base 16 along a straight line through a screw and a screw nut. Specifically, the driving mechanism 17 drives the screw to rotate, and the screw nut is sleeved on the screw, and the screw nut is connected to the base 16. In this way, by changing the rotation direction of the screw driven by the driving mechanism 17, the reciprocating linear motion of the base 16 can be realized. In this embodiment, one end of the screw is arranged toward the unwinding mechanism 1, and the other end of the screw is arranged toward the rewinding mechanism 2. When the base 16 moves toward one end of the unwinding mechanism 1, the substrate path 4 between the base 16 and the unwinding mechanism 1 is shortened while the substrate path 4 between the printing mechanism 5 and the rewinding mechanism 2 is lengthened; when the base 16 moves toward one end of the rewinding mechanism 2, the substrate path 4 between the base 16 and the unwinding mechanism 1 is lengthened while the substrate path 4 between the rewinding mechanism 2 and the base 16 is shortened.

[0033] In this embodiment, the piezoelectric inkjet digital printer further includes a controller 8, which is electrically connected to the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3, the printing mechanism 5, and the drive mechanism 17. The controller 8 controls the operation of the unwinding mechanism 1, the rewinding mechanism 2, the traction mechanism 3, the printing mechanism 5, and the drive mechanism 17. The controller 8 may also include a display screen for displaying the operating status of various components and for adjusting component parameters, such as rotational speed, on the display screen.

[0034] The piezoelectric inkjet digital printer of this embodiment also includes a detection mechanism 9, which is arranged on the substrate path 4 between the second temporary storage roller 15 and the unwinding mechanism 1. The detection mechanism 9 is also electrically connected to the controller 8. After the printed substrate is released by the second temporary storage roller 15, it can be detected by the detection mechanism 9. The detection mechanism 9 is usually provided with a camera to take pictures of the pattern printed on the substrate and detect the overall clarity of the final image. The piezoelectric inkjet digital printer also includes an operating table 10, which is arranged on the substrate path 4 between the detection mechanism 9 and the unwinding mechanism 1. When the detection mechanism 9 detects that the pattern has defects, the pattern will stay on the operating table 10. After manual processing, the substrate will be collected into a roll by the winding device. If no defective pattern is detected, it will be directly collected into a roll by the winding device.

[0035] The piezoelectric inkjet digital printer of this embodiment further includes a correction mechanism 12, which is disposed on the frame 7 and is located on the substrate path 4 between the unwinding mechanism 1 and the first temporary storage roller 14. The substrate can be corrected by the correction mechanism 12 to ensure that the substrate can move smoothly on the substrate path 4. The printer further includes a curing mechanism 13, which is disposed on the frame 7 and is located on the substrate path 4 between the printing mechanism 5 and the second temporary storage roller 15. The curing mechanism 13 in this application is an ultraviolet curing mechanism 13, and the printed pattern is cured by the curing mechanism 13.

[0036] The working process of the present invention is as follows: the traction mechanism 3 continuously drives the unwinding mechanism 1 and the rewinding mechanism 2 to rotate, the unwinding mechanism 1 continuously releases the substrate, the base 16 moves toward one end of the rewinding mechanism 2, lengthens the substrate path 4 between the base 16 and the unwinding mechanism 1, and shortens the substrate path 4 between the rewinding mechanism 2 and the base 16, the first temporary storage roller 14 temporarily stores the substrate, the second temporary storage roller 15 releases the substrate, and the printing mechanism 5 performs the printing work at this time. After the printing mechanism 5 is completed, the base 16 moves toward one end of the unwinding mechanism 1, shortens the substrate path 4 between the base 16 and the unwinding mechanism 1, and lengthens the substrate path 4 between the printing mechanism 5 and the rewinding mechanism 2, the first temporary storage roller 14 releases the substrate, the second temporary storage roller 15 temporarily stores the substrate and also releases part of the substrate, and the rewinding mechanism 2 continues to rewind.

[0037] In summary, an embodiment of the present invention provides a piezoelectric inkjet digital printer, which, by setting a temporary storage mechanism 6, ensures that the piezoelectric inkjet digital printer does not stop when printing, and the servo motors of the unwinding mechanism 1, the rewinding mechanism 2 and the driving roller continue to work, thereby avoiding accidental rotation of the unwinding mechanism 1, the rewinding mechanism 2 or the driving roller due to the action of the substrate, and the substrate will not move on the printing table, thereby reducing the risk of misalignment of the printed pattern and reducing the impact on the overall clarity of the final image.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A piezoelectric inkjet digital printer, characterized in that: include: Unwinding mechanism; Winding mechanism; A traction mechanism, which drives the substrate to move from the unwinding mechanism to the rewinding mechanism and form a substrate path; A printing mechanism, which is arranged on the substrate path; A temporary storage mechanism, comprising a first temporary storage roller and a second temporary storage roller, wherein the first temporary storage roller is arranged on the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller is arranged on the substrate path between the printing mechanism and the winding mechanism, wherein the first temporary storage roller can lengthen the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller can shorten the substrate path between the printing mechanism and the winding mechanism, or the first temporary storage roller can shorten the substrate path between the unwinding mechanism and the printing mechanism, and the second temporary storage roller can lengthen the substrate path between the printing mechanism and the winding mechanism; It also includes a frame, and the unwinding mechanism, the rewinding mechanism, the traction mechanism, the printing mechanism and the temporary storage mechanism are all arranged on the frame; The temporary storage mechanism further includes a base, the first temporary storage roller and the second temporary storage roller are both arranged on the base, and the base can move on the frame; It also includes a plurality of guide rollers, which are arranged on the frame and along the substrate path.

2. The piezoelectric inkjet digital printer according to claim 1, characterized in that: The temporary storage mechanism also includes a driving mechanism, and the driving mechanism can drive the base to perform reciprocating motion along a straight line.

3. The piezoelectric inkjet digital printer according to claim 2, characterized in that: It also includes a controller, which is electrically connected to the unwinding mechanism, the rewinding mechanism, the traction mechanism, the printing mechanism and the driving mechanism respectively.

4. The piezoelectric inkjet digital printer according to claim 3, characterized in that: It also includes a detection mechanism, which is arranged on the substrate path between the second temporary storage roller and the unwinding mechanism, and the detection mechanism is also electrically connected to the controller.

5. The piezoelectric inkjet digital printer according to claim 4, characterized in that: It also includes an operating table, which is arranged on the substrate path between the detection mechanism and the unwinding mechanism.

6. The piezoelectric inkjet digital printer according to claim 1, characterized in that: It also includes a deviation correction mechanism, which is arranged on the frame and located on the substrate path between the unwinding mechanism and the first temporary storage roller.

7. The piezoelectric inkjet digital printer according to claim 1, characterized in that: It also includes a curing mechanism, which is arranged on the frame and located on the substrate path between the printing mechanism and the second temporary storage roller.

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