Three-stage tension control unwinding device for easy-to-deform printing material
By using a three-stage tension control device to regulate the tension of easily deformable printing materials, the problem of multi-color overprinting quality caused by unstable printing material tension is solved, achieving stable tension control and high-quality printing results during the printing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIUZHOU LIANYIN MASCH MFG CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-04-17
AI Technical Summary
During the printing process, the unstable tension of easily deformable printing materials leads to poor quality of multicolor overprinting, which is difficult to control precisely with existing technologies.
A three-stage tension control device is adopted, including a first-stage printing material tension disturbance absorption and regulation device, a second-stage printing material tension disturbance absorption and regulation device, and a third-stage printing material tension regulation device. Through tension sensors and frequency converters, the motor drives the roller group to achieve real-time adjustment and stabilization of the printing material tension.
It effectively eliminates printing material tension fluctuations, ensuring the printing material remains stable in subsequent processes, achieving high-quality printing with multi-color overprinting, and improving the accuracy and quality of printed materials.
Smart Images
Figure CN224132374U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing machinery technology, and in particular to a three-level tension control unwinding device for easily deformable printing materials. Background Technology
[0002] When performing high-precision printing on easily deformable printing materials, such as non-woven fabrics and household paper, it is crucial to ensure that the printing material remains flat and maintains a certain paper feed force before entering the printing equipment. During the printing process, the tension of the printing material needs to be constant and appropriate. If the tension is too high, the printed dots will deform, the printing material will wrinkle longitudinally, or even break laterally; if the tension is too low, it will lead to misregistration and lateral wrinkles. Unstable printing material tension will also cause printing defects such as misregistration, ghosting, and longitudinal wrinkles.
[0003] Precise tension control is crucial for ensuring constant and stable tension of the printed material during transport. Accurate multi-color printing is even more challenging for easily deformable, soft, easily stretched, and multi-layered printed materials. Typically, such materials require calendering to compact and shape them; otherwise, not only is material wasted, but machine efficiency is also affected. After calendering, easily deformable printed materials will deform. Therefore, a secondary swing arm is used after the calendering shaft to absorb disturbances. This secondary swing arm can absorb both large and small disturbances, but its reaction speed is relatively slow and cannot absorb disturbances in a timely manner. Therefore, the accuracy of multi-color printing on easily deformable materials needs further improvement. Utility Model Content
[0004] This invention provides a three-stage tension control unwinding device for easily deformable printed materials. This device mainly solves the problem that the tension of easily deformable printed materials is not stable enough during unwinding and printing, which affects the accuracy of multi-color overprinting.
[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: It includes an unwinding device, a first-stage printing material tension disturbance absorption and control device and a second-stage printing material tension disturbance absorption and control device are provided on the printing material output channel of the unwinding device, and a third-stage printing material tension control device is provided on the printing material output channel in front of the second-stage printing material tension disturbance absorption and control device along the direction of printing material movement. The third-stage printing material tension control device includes a pair of conveying roller groups composed of pressure rollers and drive rollers, and a guide roller. A tension sensor for real-time measurement of the tension borne by the guide roller is installed on the guide roller. A first fixed guide roller and a second fixed guide roller are respectively provided in front of and behind the guide roller. The drive roller is driven by a motor controlled by a frequency converter, and the output end of the tension sensor is connected to the input end of the frequency converter that controls the motor speed.
[0006] A more specific solution to the above technical solution is as follows: along the direction of the printing material running, a pair of shaping traction rollers are provided after the second-stage printing material tension disturbance absorption and control device, and the shaping traction rollers are driven by a motor controlled by a frequency converter.
[0007] Furthermore: the first-stage printing material tension disturbance absorption and control device includes at least one primary fixed guide roller and at least one primary floating roller mounted on a primary swing rod; the primary floating roller is disposed at one end of the primary swing rod, the other end of the primary swing rod is equipped with a primary transmission gear, and the primary swing rod can swing around the axis of the primary transmission gear; a primary telescopic cylinder is fixedly mounted on the end of the primary swing rod near the end equipped with the primary floating roller; a primary position sensor for detecting the rotational position of the primary swing rod is mounted on the shaft of the primary swing rod equipped with the primary transmission gear, the signal output end of the primary position sensor is connected to the input end of the frequency converter, and the unwinding speed of the unwinding device is controlled by the position signal of the position sensor.
[0008] Furthermore: the first-stage swing rod is placed vertically, the first-stage floating roller is installed at the lower end of the first-stage swing rod, the first-stage telescopic cylinder is arranged horizontally, and its telescopic rod is connected to the end of the first-stage swing rod near the floating roller. A first-stage fixed guide roller is provided in front of the first-stage floating roller, and two first-stage fixed guide rollers are provided behind the first-stage floating roller.
[0009] Furthermore: the second-stage printing material tension disturbance absorption and control device includes at least one secondary fixed guide roller and at least one secondary floating roller mounted on a secondary swing rod; the secondary floating roller is disposed at one end of the secondary swing rod, and a secondary transmission gear is mounted at the other end of the secondary swing rod, and the secondary swing rod can swing around the axis of the secondary transmission gear; a secondary position sensor for detecting the rotational position of the secondary swing rod is mounted on the shaft of the secondary swing rod on which the secondary transmission gear is mounted, and the signal output end of the secondary position sensor is connected to the input end of the frequency converter, and the traction speed of the shaping traction roller is controlled by the position signal of the secondary position sensor.
[0010] Furthermore: the second-stage swing rod of the second-stage printing material tension disturbance absorption and control device consists of a vertical rod and a horizontal rod. The bottom end of the vertical rod is connected to the second-stage floating roller, one end of the horizontal rod is fixed to the top end of the vertical rod, the second-stage transmission gear is fixed at the joint position of the horizontal rod and the vertical rod, and the other end of the horizontal rod is connected to a second-stage telescopic cylinder.
[0011] Furthermore, a correction machine is provided on the printing material output channel between the first-stage printing material tension disturbance absorption and control device and the pair of shaping traction rollers.
[0012] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:
[0013] Because this device is equipped with a three-stage printing material tension control system, the tension of the easily deformable printing material is controlled to a stable state before entering the subsequent process by regulating the tension of the easily deformable printing material three times. The first-stage printing material tension disturbance absorption and control device stretches the material, the second-stage device shapes it, and the third-stage device precisely adjusts the tension. That is, before the easily deformable printing material enters the subsequent process, the tension sensor in the third-stage device adjusts the conveying speed of the conveyor roller group to adjust the tension of the easily deformable printing material. This eliminates the tension fluctuations caused by the elasticity of the easily deformable printing material, ensuring that the deformation of the easily deformable printing material is minimized and the tension is stable in the subsequent process. Ultimately, this ensures accurate registration of the easily deformable printing material when it is printed in the printing unit, enabling high-quality multi-color printing and producing high-quality printed products. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Explanation of serial numbers:
[0016] Unwinding frame 1, unwinding roller 2, unwinding belt 3, pressure roller 4, drive roller 5, guide roller 6, tension sensor 7, first fixed guide roller 8, second fixed guide roller 9, shaping traction roller 10, first-stage floating roller 11, first-stage swing rod 12, first-stage transmission gear 13, first-stage telescopic cylinder 14, first-stage position sensor 15, first-stage fixed guide roller 16, second-stage fixed guide roller 17, vertical rod 18-1, horizontal rod 18-2, second-stage floating roller 19, second-stage transmission gear 20, second-stage telescopic cylinder 21, second-stage position sensor 22, motor 23, paper feeder 24, web guiding machine 25, paper tape 26. Detailed Implementation
[0017] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0020] like Figure 1The three-stage tension control unwinding device for easily deformable printed materials shown is used for tension control of easily deformable, soft, easily stretched, and multi-layered printed materials such as non-woven fabrics and tissue paper before printing. It includes multiple unwinding devices, each of which includes an unwinding roller 2 mounted on the base of the unwinding frame 1 and an unwinding belt 3 connected and driven by an unwinding drive device at the top of the unwinding roller 2. A first-stage printing material tension disturbance absorption and control device and a second-stage printing material tension disturbance absorption and control device are provided on the printing material output channel of the unwinding device. Along the direction of printing material movement, a third-stage printing material tension control device is provided on the printing material output channel in front of the second-stage printing material tension disturbance absorption and control device. The third-stage printing material tension control device includes a pair of conveyor roller groups and a guide roller 6. The conveyor roller group consists of a pressure roller 4 and a drive roller 5. The guide roller is equipped with a device for real-time measurement of the guide roller 6. The tension sensor 7 bears the tension. A first fixed guide roller 8 and a second fixed guide roller 9 are respectively provided in front of and behind the guide roller 6. The drive roller 5 is driven by a motor controlled by a frequency converter. The output end of the tension sensor 7 is connected to the input end of the frequency converter that controls the speed of the motor. When the tension of the paper tape 26 changes, the tension sensor 7 sends a signal to the frequency converter of the drive roller 5. The frequency converter controls the motor of the drive roller 5 to change the speed of the drive roller 5, thereby adjusting the tension of the paper tape. The pressure roller 4, which cooperates with the drive roller 5, presses on the drive roller 5 and can isolate the tension of the paper tape before and after entering and exiting the drive roller, realizing the third tension control and achieving three levels of precise adjustment. Along the direction of the printing material running, a pair of shaping traction rollers 10 are provided in front of the second-level printing material tension disturbance absorption and control device. The shaping traction rollers are driven by a motor controlled by a frequency converter, and the motor of the shaping traction rollers is fixed on the frame.
[0021] The unwinding device is driven by a motor 23 controlled by a frequency converter. The motor 23 is fixed on the unwinding frame 1. The output shaft of the motor 23 is connected to a drive wheel. The drive wheel is connected to a synchronous pulley via a synchronous belt. The axle of the synchronous pulley is sleeved with the drive shaft (this part of the structure is not shown). A paper feeder 24 is hinged on the drive shaft. Two drum-shaped pulleys are provided at both ends of the paper feeder 24. The drive shaft is connected to the drum-shaped pulleys. The drum-shaped pulleys drive the unwinding belt 3. When the unwinding belt 3 moves, it drives the paper to move.
[0022] The first-stage printing material tension disturbance absorption and control device includes three primary fixed guide rollers 16 and one primary floating roller 11. A primary swing rod 12 is placed vertically, and the primary floating roller 11 is installed at the lower end of the primary swing rod 12. A primary transmission gear 13, which is a sector gear, is installed at the upper end of the primary swing rod 12. The primary swing rod 12 can swing left and right around the axis of the primary transmission gear. A primary telescopic cylinder 14 is fixedly installed on the end of the primary swing rod 12 near the primary floating roller 11. The primary telescopic cylinder 14 is arranged horizontally, and its telescopic rod is connected to the end of the primary swing rod near the primary floating roller 11. One primary fixed guide roller 16 is located behind the primary floating roller 11, and the other two primary fixed guide rollers 16 are located above the primary floating roller 11. 1. A primary position sensor 15 is installed on the shaft end of the primary swing rod 12, which is equipped with a primary transmission gear 13, to detect the rotational position of the primary swing rod. The signal output terminal of the primary position sensor 15 is connected to the input terminal of the frequency converter. The unwinding speed of the unwinding device is controlled by the position signal of the position sensor. When the tension of the paper tape changes, the tension of the primary cylinder 14 and the paper pull drives the primary floating roller 11, which in turn drives the primary swing rod 12 to swing around the swing rod shaft equipped with a sector gear. The primary floating roller swings left and right to absorb vibration. At the same time, the primary position sensor 15 generates a position signal, which is sent to the frequency converter to control the speed of the motor 23 of the unwinding drive device, thereby changing the paper feed speed and realizing the first tension control.
[0023] The second-stage printing material tension disturbance absorption and control device includes a secondary fixed guide roller 17 and a secondary floating roller 19 mounted on a secondary swing rod. The secondary swing rod consists of a vertical rod 18-1 and a horizontal rod 18-2. The secondary floating roller 19 is mounted on the lower end of the vertical rod 18-1, and one end of the horizontal rod 18-2 is fixed to the top end of the vertical rod 18-1. A secondary transmission gear 20, which is a sector gear, is mounted at the joint position of the vertical rod 18-1 and the horizontal rod 18-2. The secondary swing rod can swing around the axis of the secondary transmission gear. The other end of the horizontal rod 18-2 is connected to a secondary telescopic cylinder 21, which can be a pneumatic cylinder. A detection device is mounted on the rotating shaft of the secondary swing rod on which the secondary transmission gear 20 is mounted. A secondary position sensor 22 measures the rotational position of the secondary swing rod. This sensor detects the position of the secondary swing rod, whose swing torque is controlled by a telescopic cylinder. The signal output of the secondary position sensor is connected to the input of the frequency converter. When the paper tape tension changes, the secondary cylinder and the paper tension cause the secondary swing rod to swing around the axis of the sector gear, simultaneously driving the floating roller 19 to swing laterally left and right to absorb vibration. As the secondary swing rod swings around the axis of the sector gear, the secondary position sensor 22 detects the electrical signal at that position. This signal is sent to the frequency converter to adjust the motor speed and control the traction and conveying speed of the shaping traction roller, thereby changing the paper feed speed and achieving secondary tension control. The two rollers of the shaping traction roller 10 can both be rubber rollers, or one roller can be a rubber roller and the other a smooth roller.
[0024] A correction machine 25 is provided on the printing material output channel between the primary printing material tension disturbance absorption and control device and a pair of shaping traction rollers 10. The shaping conveying roller is assembled on a movable roller frame, and a compression spring (not shown in the figure) is installed between the roller frame and the roller frame support.
Claims
1. A three-stage tension control unwinding device for a deformable printing material, comprising an unwinding device, a first-stage printing material tension disturbance absorbing and regulating device and a second-stage printing material tension disturbance absorbing and regulating device arranged on a printing material output channel of the unwinding device, characterized in that: Along the direction of the printing material's movement, a third-stage printing material tension control device is provided on the printing material output channel in front of the second-stage printing material tension disturbance absorption and control device. The third-stage printing material tension control device includes a pair of conveying roller groups consisting of pressure rollers and drive rollers, as well as a guide roller. A tension sensor for measuring the tension borne by the guide roller in real time is installed on the guide roller. A first fixed guide roller and a second fixed guide roller are respectively provided in front of and behind the guide roller. The drive roller is driven by a motor controlled by a frequency converter. The output terminal of the tension sensor is connected to the input terminal of the frequency converter that controls the motor speed.
2. The third level tension control unwinding device for the easily deformable printing material according to claim 1, characterized in that: Along the direction of the printing material's movement, a pair of shaping traction rollers are provided after the second-stage printing material tension disturbance absorption and control device. These shaping traction rollers are driven by a motor controlled by a frequency converter.
3. The third level tension control unwinding device for the easily deformable printing material according to claim 1, characterized in that: The first-stage printing material tension disturbance absorption and control device includes at least one primary fixed guide roller and at least one primary floating roller mounted on a primary swing rod. The primary floating roller is disposed at one end of the primary swing rod, and a primary transmission gear is mounted at the other end of the primary swing rod. The primary swing rod can swing around the axis of the primary transmission gear. A primary telescopic cylinder is fixedly mounted on the end of the primary swing rod near the end where the primary floating roller is mounted. A primary position sensor for detecting the rotational position of the primary swing rod is mounted on the shaft of the primary swing rod where the primary transmission gear is mounted. The signal output terminal of the primary position sensor is connected to the input terminal of the frequency converter. The unwinding speed of the unwinding device is controlled by the position signal of the position sensor.
4. The three-stage tension control unwinding device for easily deformable printed materials according to claim 3, characterized in that: The first-stage swing rod is placed vertically, and the first-stage floating roller is installed at the lower end of the first-stage swing rod. The first-stage telescopic cylinder is arranged horizontally, and its telescopic rod is connected to the end of the first-stage swing rod near the floating roller. A first-stage fixed guide roller is provided in front of the first-stage floating roller, and two first-stage fixed guide rollers are provided behind the first-stage floating roller.
5. The third level tension control unwinding device for the easily deformable printing material according to claim 2, characterized in that: The second-stage printing material tension disturbance absorption and control device includes at least one secondary fixed guide roller and at least one secondary floating roller mounted on a secondary swing rod. The secondary floating roller is located at one end of the secondary swing rod, and the other end of the secondary swing rod is equipped with a secondary transmission gear. The secondary swing rod can swing around the axis of the secondary transmission gear. A secondary position sensor for detecting the rotational position of the secondary swing rod is mounted on the shaft of the secondary swing rod on which the secondary transmission gear is mounted. The signal output terminal of the secondary position sensor is connected to the input terminal of the frequency converter, and the traction speed of the shaping traction roller is controlled by the position signal of the secondary position sensor.
6. The third level tension control unwinding device for a deformable printing material according to claim 5, wherein: The second-stage swing rod of the second-stage printing material tension disturbance absorption and control device consists of a vertical rod and a horizontal rod. The bottom end of the vertical rod is connected to the second-stage floating roller, one end of the horizontal rod is fixed to the top end of the vertical rod, the second-stage transmission gear is fixed at the joint position of the horizontal rod and the vertical rod, and the other end of the horizontal rod is connected to the second-stage telescopic cylinder.
7. The third level tension control unwinding device for the easily deformable printing material according to claim 2, characterized in that: A correction machine is provided on the printing material output channel between the first-stage printing material tension disturbance absorption and control device and the pair of shaping traction rollers.