Tensioning mechanism of digital printing machine

Abstract

The utility model discloses a tensioning mechanism of a digital calico printing machine, which relates to the technical field of digital calico printing machines, and is characterized in that the digital calico printing machine comprises a calico printing machine body, a calico printing operation table and a cloth collecting roller, the tensioning mechanism comprises a transverse tensioning roller and a longitudinal tensioning roller, the outer wall of the calico printing machine body is fixedly connected with a rack, and the rack is fixedly connected with the calico printing operation table. Two auxiliary rollers are rotationally connected to the rack, the transverse tensioning roller is slidably connected to the rack, the cloth collecting roller is rotationally connected to the printing machine body, a shell is arranged on the longitudinal tensioning roller, the longitudinal tensioning roller is rotationally connected into the shell, a plurality of dampers are arranged on the top of the shell, and the dampers are arranged on the two sides of the shell. And a limiting strip is arranged on the printing machine body. According to the tensioning mechanism of the digital printing machine, due to the structural arrangement, the possibility that cloth cracks due to the fact that the diameter of the printing roller on the cloth collecting roller is too large is reduced, and rolling stability and flatness are improved.

Description

Technical Field

[0001] This utility model relates to the field of digital printing machine technology, and more specifically, to the tensioning mechanism of a digital printing machine. Background Technology

[0002] Digital printing is printing using digital technology. The pattern is input into a computer in digital form, edited and processed by a computer printing color separation and drawing system, and then the computer controls micro piezoelectric inkjet nozzles to spray special dye directly onto the textile. Digital printing machines mainly include: the printing machine body, the printing operating table, the take-up roller, auxiliary rollers, etc. Existing digital printing machines are also equipped with a tensioning mechanism, which adjusts the tension of the printed fabric during take-up to ensure the flatness of the printed fabric during the take-up process.

[0003] The patent application with application number CN202321472371.0 raises the issue that during the normal dyeing and winding of fabric, the lack of a good tensioning mechanism can cause the fabric to become loose, resulting in an untight winding. In this patent, the printed fabric is tensioned by a pressure roller during the winding process. However, as the winding process continues, the diameter of the printed fabric on the winding roller increases. As the diameter of the printed fabric roll gradually increases, the tension force of the pressure roller on the printed fabric also gradually increases. Excessive tension can cause the printed fabric to stretch or even break.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tensioning mechanism for a digital printing machine.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: the tensioning mechanism of the digital printing machine, the digital printing machine including the printing machine body, the printing operating table and the take-up roller, the tensioning mechanism including the transverse tensioning roller and the longitudinal tensioning roller, the frame fixedly connected to the outer wall of the printing machine body, two auxiliary rollers rotatably connected to the frame, the transverse tensioning roller slidably connected to the frame, the take-up roller rotatably connected to the printing machine body, the longitudinal tensioning roller is provided with a shell, the longitudinal tensioning roller is rotatably connected inside the shell, a plurality of dampers are provided on the top of the shell, the printing machine body is provided with a limit strip, the limit strip is located above the dampers, and one end of the damper is fixedly connected to the top of the shell, and the other end is fixedly connected to the bottom surface of the limit strip.

[0007] The present invention is further configured such that: sliding blocks are fixedly connected to both ends of the outer shell, and a longitudinal groove is provided on the end face of the printing machine body near the outer shell, and the sliding blocks extend into the groove.

[0008] The present invention is further configured such that the damper is a hydraulic damper, and the stroke range of the hydraulic damper is 0-150mm.

[0009] The present invention is further configured such that the two auxiliary rollers are respectively located near the upper and lower ends of the frame, and the transverse tension roller is located between the two auxiliary rollers.

[0010] The present invention is further configured such that: a second slide groove communicating with a first slide groove is provided on the printing machine body, the vertical cross-sectional shape of the second slide groove is an inferior arc, the sliding block can slide into the second slide groove, a rotating groove is provided on the end face of the printing machine body that abuts against the limiting strip, and a rotating shaft extending into the rotating groove is fixedly connected to both ends of the limiting strip.

[0011] The present invention is further configured such that: the length of the longitudinal tension roller is equal to the length of the take-up roller, the longitudinal tension roller is located obliquely below the take-up roller, and the height difference between the longitudinal tension roller and the take-up roller is greater than 150mm.

[0012] In summary, this utility model has the following beneficial effects:

[0013] The transverse tension roller is slidably connected to the frame and its position can be flexibly adjusted according to the transverse tension of the fabric. At the same time, the longitudinal tension roller, together with the outer shell, damper and other components, can effectively control the tension of the fabric in the longitudinal direction. This tension adjustment mechanism in both the transverse and longitudinal directions can accurately adapt to the tension requirements of different types and thicknesses of fabrics during the printing process.

[0014] The transverse tension roller is located between the two auxiliary rollers, and the longitudinal tension roller is located diagonally below the take-up roller and is of equal length with a height difference greater than 150mm. This layout makes full use of the internal space of the digital printing machine, reduces the size of the equipment, and facilitates installation and maintenance.

[0015] The hydraulic damper has a stroke range of 0-150mm and can buffer when the fabric tension changes dynamically. During the operation of the digital printing machine, such as when accelerating, decelerating, or encountering sudden pulling of the fabric, the damper can absorb and alleviate the additional tension caused by these changes, preventing the fabric from breaking due to excessive tension or becoming loose or shifting due to insufficient tension, thus ensuring the continuity and stability of the printing work. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 A cross-sectional view of this utility model Figure 1 ;

[0019] Figure 4 A cross-sectional view of this utility model Figure 2 .

[0020] In the diagram: 1. Printing machine body; 101. Slide 1; 102. Slide 2; 2. Printing operating table; 3. Frame; 4. Auxiliary roller; 5. Transverse tension roller; 7. Limiting strip; 701. Rotating shaft; 8. Outer shell; 801. Sliding block; 9. Hydraulic damper; 10. Longitudinal tension roller; 11. Take-up roller. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] The tensioning mechanism of a digital printing machine, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the digital printing machine includes a printing machine body 1, a printing operating table 2, and a take-up roller 11. The tensioning mechanism includes a transverse tensioning roller 5 and a longitudinal tensioning roller 10. A frame 3 is fixedly connected to the outer wall of the printing machine body 1. Two auxiliary rollers 4 are rotatably connected to the frame 3. The transverse tensioning roller 5 is slidably connected to the frame 3. The take-up roller 11 is rotatably connected to the printing machine body 1. A housing 8 is provided on the longitudinal tensioning roller 10, and the longitudinal tensioning roller 10 is rotatably connected inside the housing 8. Several dampers are provided on the top of the housing 8. A limit strip 7 is provided on the printing machine body 1. The limit strip 7 is located above the dampers, and one end of the damper is fixedly connected to the top of the housing 8, and the other end is fixedly connected to the limit strip 7. On the bottom surface, the printed fabric is tensioned once by sliding the transverse tension roller 5. When the take-up roller 11 is winding up the printed fabric, the longitudinal tension roller 10 continues to press down on the printed fabric for further tension, ensuring that the take-up roller 11 can stably and flatly wind up the printed fabric. The longitudinal tension roller 10 is rotatably connected inside the outer shell 8, and the outer shell 8 is equipped with several dampers. The longitudinal tension roller 10 can slide up and down inside the printing machine body 1 through the dampers. When the diameter of the printed fabric on the take-up roller 11 increases, the longitudinal tension roller 10 will gradually move upward. The setting of the dampers allows the longitudinal tension roller 10 to continuously apply pressure to the printed fabric, so that the printed fabric is stably and flatly wound onto the take-up roller 11.

[0023] A frame 3 is fixedly connected to the outer wall of the printing machine body 1. Two auxiliary rollers 4 are rotatably connected to the frame 3. These two auxiliary rollers 4 are located above and below the transverse tension roller 5, respectively, to provide auxiliary support and guidance for the fabric. The transverse tension roller 5 is slidably connected to the frame 3 and its position can be adjusted as needed to adapt to fabrics of different widths or materials, ensuring uniform tension of the fabric in the transverse direction. Preferably, a rotating wheel is provided on the frame 3, and sliding plates are provided at both ends of the transverse tension roller 5. A rack is provided on one side of the sliding plate, and a gear is provided at one end of the rotating wheel. The transverse tension roller 5 is moved laterally by the meshing of the gear and rack, thereby adjusting the tension of the printed fabric.

[0024] The longitudinal tension roller 10 is housed inside the outer casing 8. Sliding blocks 801 are fixedly connected to both ends of the outer casing 8. These sliding blocks 801 can extend into the longitudinal groove 101 opened on the printing machine body 1, allowing the outer casing 8 (and the longitudinal tension roller 10 inside) to slide up and down along the groove 101, thereby adjusting the longitudinal tension of the fabric. Several dampers are provided on the top of the outer casing 8. One end of these dampers is fixedly connected to the top of the outer casing 8, and the other end is fixedly connected to the bottom surface of the upper limit bar 7 of the printing machine body 1. As the diameter of the printed fabric on the take-up roller 11 gradually increases, the dampers gradually contract, causing the longitudinal tension roller 10 to gradually move upward, reducing the excessive pressure on the embossed fabric. The damper helps stabilize the position of the longitudinal tension roller 10, preventing it from shaking due to changes in fabric tension during operation. The damper is preferably a hydraulic damper 9 with a stroke range of 0-150mm. This design allows the tensioning mechanism to flexibly respond to different tension requirements while ensuring the smoothness and accuracy of the adjustment process. The length of the longitudinal tension roller 10 is equal to the length of the take-up roller 11, ensuring that the two can correspond perfectly during fabric transfer. At the same time, the longitudinal tension roller 10 is located diagonally below the take-up roller 11, and the height difference between the two is greater than 150mm. This design helps to form a reasonable fabric tension gradient and improve take-up efficiency.

[0025] To facilitate the replacement of the take-up roller 11, the printing machine body 1 is also provided with a second slide 102 that communicates with the first slide 101. The vertical cross-section of the second slide 102 is in the shape of a minor arc. The ends of the first slide 101 and the second slide 102 that are close to the ground are connected. The sliding block 801 can slide into the second slide 102. The two ends of the limiting strip 7 extend into the rotating groove opened on the printing machine body 1 through the rotating shaft 701. The rotating shaft 701 serves as the center of the second slide 102. The limiting strip 7, the outer shell 8, and the longitudinal tension roller 10 slide upwards, which facilitates the disassembly or installation of the take-up roller 11.

[0026] When the printing machine starts working, the fabric is printed on the printing table 2 and then passes through the auxiliary roller 4, the transverse tension roller 5, and the longitudinal tension roller 10 in sequence, finally reaching the take-up roller 11. During this process, the tension of the fabric may change due to the fabric conveying and the printing operation. For example, when the fabric is stretched or relaxed during the printing process, the transverse tension roller 5 can slide along the frame 3 to adjust the transverse tension, while the longitudinal tension roller 10 rotates inside the housing 8 and the housing 8 can slide longitudinally to adapt to changes in longitudinal tension. The hydraulic damper 9 plays a role in buffering and stabilizing the tension during this process. When the diameter of the printed fabric on the take-up roller 11 gradually increases and the tension changes, causing the housing 8 to move rapidly, the hydraulic damper 9 will adjust the damping according to its stroke range (0-150mm) to limit the excessive movement of the housing 8, thereby maintaining the stability of the fabric tension.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A tensioning mechanism for a digital printing machine, the digital printing machine comprising a printing machine body (1), a printing operation table (2), and a take-up roller (11), characterized in that: The tensioning mechanism includes a transverse tensioning roller (5) and a longitudinal tensioning roller (10). A frame (3) is fixedly connected to the outer wall of the printing machine body (1). Two auxiliary rollers (4) are rotatably connected to the frame (3). The transverse tensioning roller (5) is slidably connected to the frame (3). The take-up roller (11) is rotatably connected to the printing machine body (1). A housing (8) is provided on the longitudinal tensioning roller (10). The longitudinal tensioning roller (10) is rotatably connected inside the housing (8). Several dampers are provided on the top of the housing (8). A limit strip (7) is provided on the printing machine body (1). The limit strip (7) is located above the dampers. One end of the damper is fixedly connected to the top of the housing (8), and the other end is fixedly connected to the bottom surface of the limit strip (7).

2. The tensioning mechanism of the digital printing machine according to claim 1, characterized in that: The two ends of the outer shell (8) are fixedly connected with sliding blocks (801). The printing machine body (1) has a longitudinal groove (101) on the end face near the outer shell (8). The sliding block (801) extends into the groove (101).

3. The tensioning mechanism of the digital printing machine according to claim 1, characterized in that: The damper is configured as a hydraulic damper (9), and the stroke range of the hydraulic damper (9) is 0-150mm.

4. The tensioning mechanism of the digital printing machine according to claim 3, characterized in that: The two auxiliary rollers (4) are located near the upper and lower ends of the frame (3), respectively, and the transverse tension roller (5) is located between the two auxiliary rollers (4).

5. The tensioning mechanism of the digital printing machine according to claim 2, characterized in that: The printing machine body (1) is provided with a slide groove two (102) that communicates with slide groove one (101). The vertical cross-sectional shape of slide groove two (102) is an inferior arc. The sliding block (801) can slide into slide groove two (102). A rotating groove is provided on the end face of the printing machine body (1) that abuts against the limiting strip (7). The two ends of the limiting strip (7) are fixedly connected to a rotating shaft (701) that extends into the rotating groove.

6. The tensioning mechanism of the digital printing machine according to claim 1, characterized in that: The length of the longitudinal tension roller (10) is equal to the length of the take-up roller (11). The longitudinal tension roller (10) is located diagonally below the take-up roller (11). The height difference between the longitudinal tension roller (10) and the take-up roller (11) is greater than 150 mm.

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