Easily-deformed printing material unreeling machine

Abstract

The utility model discloses an easy-to-deform printing material unreeling machine, which relates to the field of printing machinery and comprises an unreeling device and a calendering device, a first-stage printing material tension disturbance absorption regulation and control device is arranged on a conveying channel of the unreeling device, and a second-stage printing material tension disturbance absorption regulation and control device is arranged on an output channel behind the calendering device. The printing material tension disturbance absorption regulation and control devices of the two parts respectively comprise more than one fixed guide roller and a floating roller arranged on a swing rod, the unwinding device and the calendering device are respectively driven by a motor controlled by a frequency converter, the input end of the frequency converter is connected with a position sensor for detecting the swing rod, and the sensor outputs a signal to regulate the rotating speed of the unwinding device and the calendering device. And the swinging torques of the swinging rods of the two devices are controlled by telescopic cylinders. Compared with the prior art, the unreeling device and the calendering device are respectively provided with the printing material tension disturbance absorption regulation and control device, so that the fluctuation of the printing material caused by the elastic force change is eliminated, the tension precision can be effectively controlled, and the tension stability of the printing machine in a printing unit interval is ensured.

Description

Technical Field

[0001] The utility model relates to the field of printing machinery, in particular to an unwinding machine for easily deformable printing materials. Background Art

[0002] In order to achieve high-precision printing on easily deformed printing materials such as non-woven fabrics and household paper, the printing materials must be kept flat before entering the printing device, and a certain paper feeding tension must be maintained. The tension of the printing materials needs to be constant and appropriate during the printing process. When the tension of the printing materials is too large, the printing dots will be deformed, the printing materials will wrinkle in the longitudinal direction, and even break in the transverse direction. When the tension of the printing materials is too small, it will cause inaccurate overprinting and transverse wrinkles; when the tension of the printing materials is unstable, it will also cause printing failures such as inaccurate overprinting, ghosting, and longitudinal wrinkles. Controlling the accuracy of the tension can ensure the constant and stable tension of the printing materials during transportation; however, it is more difficult to accurately complete multi-color overprinting for easily deformed, soft, easily stretched, and multi-layered printing materials. In this case, a calendering device is generally required to compact and shape, otherwise it will cause waste of printing materials and affect the efficiency of the machine. In order to solve the above technical problems, the applicant team has developed a patented technology for a printing material conveying device for a multi-color printing machine, such as patent number CN 201310029171.2. The patented technology adopts an automatic control tension system with a floating roller, uses an angle sensor to sense the changes in the upper and lower positions of the floating roller, and changes the paper feed length through automatic control to achieve the purpose of constant and stable paper feed tension. After years of use, it is found that the above-mentioned type of printing material belt that is compacted by the calendering device sometimes produces irregular deformation, and the tension is not stable enough. If the tension is not adjusted, it is difficult to accurately complete multi-color overprinting when such irregularly deformed printing materials enter the printing device for printing, which reduces the printing quality and makes it difficult to meet consumers' increasing demand for high-quality household paper. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a deformable printing material unwinding machine, which mainly solves the problem that the tension of soft, stretchable and deformable printing materials is unstable during unwinding and printing, thus affecting the printing quality.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: it includes an unwinding device and a calendering device, a first-level printing material tension disturbance absorption and control device is provided on the printing material output channel of the unwinding device, the calendering device includes a pair of calendering rollers pressed against each other and installed on the printing material conveying channel of the unwinding device, and a second-level printing material tension disturbance absorption and control device is provided on the printing material output channel after the calendering rollers, the second-level printing material tension disturbance absorption and control device includes a fixed guide roller and a floating roller installed on a second-level swing rod; the unwinding device and the calendering device are both driven by motors controlled by respective frequency converters, the input end of the frequency converter is connected to a position sensor for detecting the rotation position of the second-level swing rod, and the swing torque of the second-level swing rod is controlled by a telescopic cylinder.

[0005] In the above technical scheme, a more specific scheme can also be: the first-level printing material tension disturbance absorption and control device includes one or more fixed guide rollers and at least one floating roller installed on the first-level swing rod, the input end of the frequency converter is connected to a position sensor for detecting the rotation position of the first-level swing rod, and the unwinding speed of the unwinding device is controlled by the position signal of the position sensor, and the swing torque of the first-level swing rod is controlled by the telescopic cylinder.

[0006] Furthermore: the floating roller on the primary swing rod and the floating roller on the secondary swing rod are respectively arranged at one end of their respective swing rods, the other ends of the two swing rods are respectively equipped with transmission gears, and the two swing rods can swing around their respective gear axes, and the telescopic cylinder is fixedly installed on the ends of the two swing rods close to the floating rollers.

[0007] Further: the secondary swing rod of the secondary printing material tension disturbance absorption and control device is composed of a vertical rod and a horizontal rod, the bottom end of the vertical rod is connected to the floating roller, one end of the horizontal rod is fixed to the top of the vertical rod, the 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 telescopic cylinder.

[0008] Furthermore: a deviation correcting machine is provided on the printing material output channel between the first-level printing material tension disturbance absorbing and regulating device and a pair of calendering rollers.

[0009] Further: the two calendering rollers are mounted on a movable roller shaft frame, and a compression spring is installed between the roller shaft frame and the roller shaft frame support.

[0010] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0011] A secondary printing material tension disturbance absorbing and regulating device is added to the printing material output channel behind the calendering roller, and a floating roller is used to perform secondary regulation on the printing material conveying tension, that is, a primary printing material tension disturbance absorbing and regulating device is provided on the printing material output channel behind the unwinder, and a secondary printing material tension disturbance absorbing and regulating device is provided on the printing material output channel behind the calendering roller. By regulating the traveling tension of the printing material belt twice, the printing material is shaped, and the tension fluctuation of the printing material caused by the elasticity of the printing material is eliminated, thereby ensuring that the traveling pulling force of the printing material is constant and stable, effectively controlling the accuracy of the tension, and ensuring the stability of the tension of the printing press in the printing unit interval, so that the printing material belt can be accurately overprinted when printing in the printing unit, and high-quality printing can be completed to obtain high-quality printed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Serial number description:

[0014] Unwinding machine frame base 1, unwinding core shaft 2, unwinding belt 3, calendering roller 4, fixed guide rollers 5, 6, secondary swing rod 7, floating roller 8, primary drive motor 9, secondary position sensor 10, cylinder 11, paper feed rack 12, guide rollers 13, 14, 15, primary floating rollers 16, 17, primary swing rod 18, primary position sensor 19, sector gear pair 20, deviation corrector 21, sector gear pair 22, cylinder 23. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the utility model easier to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. In the following description, many specific details are set forth in order to fully understand the utility model, but the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship given in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "fixation" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] like Figure 1The unwinding machine for easily deformed printing materials shown is used for controlling the tension of easily deformed, soft, easily stretched, and multi-layered printing materials such as non-woven fabrics and daily paper before printing. It includes multiple unwinding devices and a calendering device. Each unwinding device includes an unwinding drawer 2 installed on the bottom seat of the unwinding frame 1 and an unwinding belt 3 provided on one side of the unwinding roller 2 and connected and driven by an unwinding driving device. A primary printing material tension disturbance absorption and regulation device is provided on the printing material output channel of the unwinding device; the calendering device includes a pair of calendering rollers 4 that press against each other and are installed on the printing material conveying channel downstream of the printing material conveying of the unwinding device; a secondary printing material tension disturbance absorption and regulation device is provided on the printing material output channel after the calendering rollers 4. The secondary printing material tension disturbance absorption and control device includes a fixed guide roller 5 and a floating roller 8 mounted on a secondary swing rod 7. The calendering roller 4 is driven by a motor controlled by a frequency converter. The motor of the calendering roller is fixed on the frame. The input end of the frequency converter is connected to the input end of a secondary position sensor 10 for detecting the rotation position of the secondary swing rod 7. The secondary position sensor is mounted on the rotating shaft of the secondary swing rod and is used to detect the position of the secondary swing rod. The secondary swing rod 7 is controlled by a telescopic cylinder to control the swing torque. The telescopic cylinder can be a pneumatic cylinder 11; the unwinding device is driven by a motor 9 controlled by a frequency converter. The motor 9 of the unwinding device is fixed on the unwinding frame 1. The output shaft of the motor 9 is connected to a driving wheel. The driving wheel It is connected to the synchronous pulley through a synchronous belt, and the wheel axle of the synchronous pulley is sleeved with the driving shaft (this part of the structure is not drawn), and a paper feed rack 12 is hinged on the driving shaft, and two drum pulleys are respectively provided at both ends of the paper feed rack 12, and the driving shaft is connected to the drum pulley, and the drum pulley and the drum pulley drive the unwinding belt 3, and the unwinding belt 3 drives the paper to move when it moves; in this design, the secondary swing rod 7 of the secondary printing material tension disturbance absorption and control device is composed of a vertical rod and a horizontal rod, the bottom end of the vertical rod is connected to a floating roller 8, and a fixed guide roller 5 is arranged on the lower right side of the floating roller 8, and a conveying roller 6 is fixedly arranged on the left side below the floating roller 5, and one end of the horizontal rod is fixed to the top end of the vertical rod, and at the junction of the horizontal rod and the vertical rod A transmission gear is fixed at the position, which can be a fan-shaped gear 20. The output end of the secondary position sensor 10 is connected to the input end of the frequency converter that controls the motor speed. The other end of the crossbar is connected to a vertically arranged pneumatic cylinder 11. When the paper tape tension changes, the pressure of the cylinder is adjusted. Under the action of this force and the paper tension, the secondary swing rod 7 swings around the axis of the fan-shaped gear, and at the same time drives the floating roller 8 to swing horizontally left and right to absorb vibration. The secondary swing rod 7 swings around the axis of the fan-shaped gear to make a position, and the secondary position sensor 10 detects the electrical signal of the position. This signal is transmitted to the frequency converter to adjust the motor speed, thereby changing the paper feeding speed and realizing the second tensioning control.

[0019] like Figure 1In the present embodiment shown, the primary printing material tension disturbance absorption and control device comprises three fixed guide rollers 13, 14, 15 and two floating rollers 16, 17 which are sequentially mounted on the primary swing rod 18 from the right end to the left. The input end of the frequency converter is connected to the signal output end of a primary position sensor 19 for detecting the rotation position of the primary swing rod 18. The primary swing rod 18 is controlled by a cylinder to exert a swinging torque. The telescopic cylinder 23, the telescopic rod of the cylinder and the primary swing rod 18 are connected at the left side of the floating roller 17. The left end of the primary swing rod 18 is fixedly mounted. There is a transmission gear, which is a fan-shaped gear 22. The primary position sensor is installed on the shaft head of the primary swing rod 18. When the tension of the paper tape changes, the cylinder 23 and the tension of the paper drive the floating rollers 16 and 17 to swing around the swing rod shaft equipped with the fan-shaped gear, driving the floating rollers to move up and down to absorb vibration. The primary swing rod 18 rotates around the swing rod shaft equipped with the fan-shaped gear. At the same time, the primary position sensor 19 generates a position signal, which is transmitted to the frequency converter to control the motor speed, thereby changing the paper feeding speed and realizing the first tensioning control.

[0020] A deviation corrector 21 is provided on the printing material output channel between the primary printing material tension disturbance absorption and control device and the two calendering rollers 4. The two calendering rollers are mounted on a movable roller frame, and a compression spring (not shown) is installed between the roller frame and the roller frame support.

[0021] In this application, the roll paper of the daily paper is installed on the unwinding shaft 2, and the paper is passed along the paper output channel. Before the paper is stretched, the tensile strength test is first carried out on the batch of paper, and the tension value of the maximum value of the increase of the tension corresponding to the unit elongation in the tensile force-elongation characteristic curve of the paper is measured as the tension reference value. The cylinder is controlled to make the unwinding belt close to the roll surface, and the unwinding belt 3 drives the paper roll to open under the drive of the motor 9 to realize paper feeding; during the paper belt conveying process, when the tension changes, the cylinder 23 and the tension of the paper drive the floating rollers 16 and 17 to swing around the swing rod shaft equipped with a fan gear, driving the floating rollers to move up and down to absorb vibration, and the first swing rod 18 rotates around the swing rod shaft equipped with a fan gear, and at the same time, the first position sensor 19 generates a position signal, which is transmitted to the frequency converter to control the motor speed, thereby changing the paper feeding speed and realizing the first tensioning control. After the first tensioning, the paper tape passes around the guide roller 15 and enters the deflection corrector 21. When the paper tape deviates, the photoelectric sensor of the deflection corrector generates an output signal to the deflection corrector controller, which controls the linear drive to drive the deflection corrector frame to rotate to the edge of the paper tape and return to the initial position. The paper tapes of multiple unwinding devices are output separately after being corrected, and the output paper tapes are merged and superimposed. The superimposed paper tapes are atomized and humidified. A pair of calendering rollers 4 on the paper tape output channel press the superimposed paper tapes to each other to make the paper tape composite. After the composite paper tape comes out of the calendering roller, it bypasses the floating roller 8 of the secondary paper material tension disturbance absorption and control device, and then passes through the fixed guide roller 5 and the conveying roller 6 to enter the printing area for printing. When the tension of the paper tape changes in the process of preparing to enter the printing area, the pressure of the cylinder is adjusted. Under the action of this force and the paper tension, the secondary swing rod 7 is made to swing around the axis of the fan gear, and at the same time, the floating roller 8 is driven to swing horizontally left and right to absorb vibration. The secondary swing rod 7 swings around the axis of the fan gear to make a position, and the secondary position sensor 10 detects the electrical signal of the position. This signal is transmitted to the frequency converter to adjust the motor speed, thereby changing the paper feeding speed and realizing the second tensioning control. The composite paper tape enters the printing area, and the printing unit prints the composite paper tape with stable tension, and its overprint is accurate and the printing quality is high.

Claims

1. A printing material unwinding machine for easily deformable printing materials, comprising an unwinding device and a calendering device, wherein a first-level printing material tension disturbance absorption and regulating device is provided on the printing material output channel of the unwinding device, and the calendering device comprises a pair of calendering rollers pressed against each other, which are installed on the printing material conveying channel of the unwinding device, characterized in that: A secondary printing material tension disturbance absorption and control device is provided on the printing material output channel after the calendering roller, and the secondary printing material tension disturbance absorption and control device includes a fixed guide roller and a floating roller installed on a secondary swing rod; the unwinding device and the calendering device are both driven by motors controlled by respective frequency converters, and the input end of the frequency converter is connected to a position sensor for detecting the rotation position of the secondary swing rod, and the swing torque of the secondary swing rod is controlled by a telescopic cylinder.

2. The unwinding machine for easily deformable printing materials according to claim 1, characterized in that: The first-level printing material tension disturbance absorption and control device includes one or more fixed guide rollers and at least one floating roller installed on the first-level swing rod. The input end of the frequency converter is connected to a position sensor for detecting the rotation position of the first-level swing rod. The unwinding speed of the unwinding device is controlled by the position signal of the position sensor. The swing torque of the first-level swing rod is controlled by the telescopic cylinder.

3. The unwinding machine for easily deformable printing materials according to claim 1 or 2, characterized in that: The floating roller on the primary swing rod and the floating roller on the secondary swing rod are respectively arranged at one end of their respective swing rods, and the other ends of the two swing rods are respectively equipped with transmission gears, and the two swing rods can swing around their respective gear axes, and the telescopic cylinders are fixedly installed on the ends of the two swing rods close to the floating rollers.

4. The unwinding machine for easily deformable printing materials according to claim 3, characterized in that: The secondary swing rod of the secondary 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 floating roller, one end of the horizontal rod is fixed to the top of the vertical rod, the 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 telescopic cylinder.

5. The unwinding machine for easily deformable printing materials according to claim 4, characterized in that: A deviation corrector is provided on the printing material output channel between the first-level printing material tension disturbance absorption and regulation device and a pair of calender rollers.

6. The unwinding machine for easily deformable printing materials according to claim 5, characterized in that: The two calendering rollers are mounted on a movable roller shaft frame, and a compression spring is arranged between the roller shaft frame and the roller shaft frame support.

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