Double traction mechanism and control method thereof

Abstract

The present invention relates to the field of printing technology, and discloses a double traction mechanism and a control method thereof, wherein the double traction mechanism comprises a first traction mechanism, a buffer mechanism, a second traction mechanism and a tension detection mechanism which are arranged in sequence, wherein the first traction mechanism is used to transmit the paper tape conveyed by the unwinding mechanism, and is located obliquely above one side of the buffer mechanism; the buffer mechanism is used to buffer the transmission speed of the paper tape; the second traction mechanism is used to transmit the paper tape conveyed by the buffer mechanism, and is located obliquely above the other side of the buffer mechanism; the tension detection device is used to detect the tension of the paper tape before it is transmitted to the die-cutting paper feeding mechanism; the paper tape conveyed by the second traction mechanism is transmitted to the die-cutting paper feeding mechanism via the tension detection device. The present invention can ensure the stable operation of the paper tape and reduce the influence of tension fluctuation on the operation of the paper tape.

Description

Technical Field

[0001] The invention relates to the field of printing technology, and in particular to a double traction mechanism and a control method thereof. Background Art

[0002] With the development of society, the profits of the printing industry have declined, and the demand for small-batch and multi-variety printing has gradually increased. Combining intelligent manufacturing, reducing production costs, and improving production efficiency, combined production processes are the inevitable choice for printing companies. For example, cigarette package printing, web printing and winding, web embossing, die-cutting, and quality inspection are the inevitable choices. They can not only improve production efficiency and save materials, but also reduce employee labor and the number of employees. For web printing, high-speed flat-bed die-cutting of web is the preferred method, because its plate making cost is much lower than that of round-to-round die-cutting. In the high-speed flat-bed die-cutting system of web, it is extremely important to stably control the tension of the paper tape so that the paper tape runs stably and reduce the influence of tension fluctuations on it. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a dual traction mechanism and a control method thereof to ensure stable operation of the paper tape and reduce the influence of tension fluctuations on the operation of the paper tape.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] One aspect of the present invention is to provide a double traction mechanism, which is arranged between an unwinding mechanism and a die-cutting and paper-feeding mechanism, and the double traction mechanism comprises:

[0006] A first traction mechanism, a buffer mechanism, a second traction mechanism and a tension detection mechanism are arranged in sequence, wherein the first traction mechanism is used to transmit the paper tape conveyed by the unwinding mechanism and is located obliquely above one side of the buffer mechanism; the buffer mechanism is used to buffer the transmission speed of the paper tape to lengthen or shorten the length of the paper tape between the buffer mechanism and the second traction mechanism; the second traction mechanism is used to transmit the paper tape conveyed by the buffer mechanism and is located obliquely above the other side of the buffer mechanism; the tension detection device is used to detect the tension of the paper tape before it is transmitted to the die-cutting paper feeding mechanism; the paper tape transmitted by the second traction mechanism is transmitted to the die-cutting paper feeding mechanism via the tension detection device.

[0007] Preferably, the buffer mechanism comprises a controller, a driving device and a transmission roller, the controller is electrically connected to the driving device, and the driving device is connected to the transmission roller to drive the transmission roller to move up and down.

[0008] Preferably, the driving device includes a driving motor, a transmission screw and a sliding seat, the transmission roller is installed on the sliding seat; the transmission screw is connected to the sliding seat; the driving motor is connected to the transmission screw to drive the transmission screw to rotate and drive the sliding seat to move up and down.

[0009] Preferably, the first traction mechanism comprises a first traction roller and a first pressure roller, and the first pressure roller is arranged above the first traction roller.

[0010] Preferably, the second traction mechanism comprises a second traction roller and a second pressure roller, and the second pressure roller is arranged above the second traction roller.

[0011] Preferably, the tension detection device comprises a tension detection roller and a tension detection sensor, and the tension detection sensor is arranged on the tension detection roller.

[0012] A second aspect of the present invention is to provide a control method for a dual traction mechanism, comprising:

[0013] The paper tape conveyed by the unwinding mechanism is transmitted by the first traction mechanism;

[0014] Transmitting the paper tape transmitted by the first traction mechanism to the second traction mechanism via the buffer mechanism;

[0015] The second traction mechanism is used to transmit the paper tape to the die-cutting paper feeding mechanism through the tension detection device;

[0016] When the die-cutting paper feeding mechanism starts feeding paper, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to increase; when the die-cutting paper feeding mechanism finishes feeding paper, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to decrease.

[0017] Preferably, when the die-cutting paper feeding mechanism starts feeding paper, the step of increasing the speed at which the buffer mechanism controls the paper tape to be transmitted to the die-cutting paper feeding mechanism includes: using a driving device to drive the transmission roller to move upward to shorten the length of the paper tape between the buffer mechanism and the second traction mechanism.

[0018] Preferably, when the die-cutting paper feeding mechanism finishes feeding paper, the step of reducing the speed of the paper tape transmitted to the die-cutting paper feeding mechanism by the buffer mechanism includes: using a driving device to drive the transmission roller to move downward to lengthen the length of the paper tape between the buffer mechanism and the second traction mechanism.

[0019] Preferably, the control method further comprises: when the tension detected by the tension detection device exceeds a preset threshold value, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to increase.

[0020] Compared with the prior art, the dual traction mechanism and control method thereof in the embodiment of the present invention have the following beneficial effects:

[0021] The double traction mechanism of the embodiment of the present invention stabilizes the tension of the paper tape output from the unwinding mechanism by means of the first traction mechanism, and divides the tension of the paper tape of the unwinding mechanism into sections with the tension of the paper tape of the double traction mechanism and the die-cutting paper feeding mechanism, thereby reducing the influence of the tension fluctuation of the paper tape of the unwinding mechanism on the tension of the paper tape delivered to the die-cutting paper feeding mechanism, so that the paper tape runs stably. The second traction mechanism can ensure the stability of the tension of the paper tape before it enters the die-cutting paper feeding mechanism, thereby improving the paper feeding stability of the die-cutting paper feeding mechanism. The buffer mechanism can buffer the transmission speed of the paper tape, so as to ensure that the paper tape runs stably into the die-cutting paper feeding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a double traction mechanism according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the working state of the buffer mechanism in an embodiment of the present invention;

[0024] In the figure, 100, unwinding mechanism; 200, die-cutting paper feeding mechanism; 300, paper tape;

[0025] 11. First traction roller; 12. First pressure roller; 21. Driving motor; 22. Transmission screw; 23. Transmission roller; 31. Second pressure roller; 32. Second traction roller; 41. Tension detection roller; 42. Tension detection sensor. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with 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.

[0027] like Figure 1 As shown, a dual traction mechanism of a preferred embodiment of the present invention is arranged between the unwinding mechanism 100 and the die-cutting paper feeding mechanism 200, so that the paper tape 300 can stably run from the unwinding mechanism 100 to the die-cutting paper feeding mechanism 200, reducing the influence of tension fluctuation on the running of the paper tape 300. The unwinding mechanism 100 is used for unwinding the material roll; and the die-cutting paper feeding mechanism 200 is used for conveying the paper tape 300 to the die-cutting platform for die-cutting processing.

[0028] It should be noted that the present invention does not describe in detail the structural composition of the unwinding mechanism 100 and the die-cutting and paper feeding mechanism 200.

[0029] like Figure 1As shown, the double traction mechanism includes a first traction mechanism, a buffer mechanism, a second traction mechanism and a tension detection mechanism which are arranged in sequence, wherein the first traction mechanism is used to transmit the paper tape 300 conveyed by the unwinding mechanism 100 and is located obliquely above one side of the buffer mechanism, as shown in FIG. Figure 1 As shown in , the paper tape 300 is transmitted from the first traction mechanism to the buffer mechanism in a right-lower oblique direction; the buffer mechanism is used to buffer the transmission speed of the paper tape 300, including increasing the transmission speed of the paper tape 300 or decreasing the transmission speed of the paper tape 300 according to the transmission requirements of the paper tape 300, so as to lengthen or shorten the length of the paper tape between the buffer mechanism and the second traction mechanism; the second traction mechanism is used to transmit the paper tape 300 conveyed by the buffer mechanism, and is located obliquely above the other side of the buffer mechanism, as shown in FIG. Figure 1 As shown in the figure, the paper tape 300 is transmitted from the buffer mechanism to the second traction mechanism in an upper right inclined direction; the tension detection device is used to detect the tension of the paper tape 300 before it is transmitted to the die-cutting paper feeding mechanism 200; the paper tape 300 transmitted by the second traction mechanism is transmitted to the die-cutting paper feeding mechanism 200 via the tension detection device.

[0030] The present invention stabilizes the tension of the paper tape 300 output from the unwinding mechanism 100 by means of the first traction mechanism, and divides the tension of the paper tape 300 of the unwinding mechanism 100 and the tension of the paper tape 300 of the double traction mechanism and the die-cutting paper feeding mechanism 200 into sections, thereby reducing the influence of the tension fluctuation of the paper tape of the unwinding mechanism 100 on the tension of the paper tape delivered to the die-cutting paper feeding mechanism 200, so that the paper tape runs stably. The second traction mechanism can ensure the stability of the tension of the paper tape 300 before it enters the die-cutting paper feeding mechanism 200, thereby improving the paper feeding stability of the die-cutting paper feeding mechanism 200. The buffer mechanism is provided to buffer the transmission speed of the paper tape, so as to ensure the stable operation of the paper tape.

[0031] In an optional embodiment, the buffer mechanism includes a controller, a driving device and a transmission roller 23, wherein the controller is electrically connected to the driving device to control the operation of the driving device; the driving device is connected to the transmission roller 23 to drive the transmission roller 23 to move up and down. Specifically, when the transmission roller 23 moves upward, Figure 2 As shown in , the driving roller 23 moves from position B to position A. Since the length of the paper tape 300 between the driving roller 23 and the first traction mechanism and between the driving roller 23 and the second traction mechanism is shortened, the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 can be increased, thereby facilitating the die-cutting paper feeding mechanism 200 to transport the paper tape 300 to the die-cutting platform for die-cutting. When the driving roller 23 moves downward, Figure 2As shown in the figure, the driving roller 23 moves from position A to position B. Since the length of the paper tape between the driving roller 23 and the first traction mechanism and the second traction mechanism is lengthened, the paper tape 300 can be stored between the driving roller 23 and the first traction mechanism, and between the driving roller 23 and the second traction mechanism, thereby reducing the speed at which the paper tape 300 is transmitted in the die-cutting paper feeding mechanism 200, thereby avoiding the paper tape 300 from accumulating in the die-cutting paper feeding mechanism 200 when the die-cutting paper feeding mechanism 200 finishes feeding paper.

[0032] Preferably, the driving device includes a driving motor 21, a transmission screw 22 and a sliding seat, the transmission roller 23 is installed on the sliding seat, and the roller shaft of the transmission roller 23 can be inserted into the sliding seat; the transmission screw 22 is connected to the sliding seat, for example, a through hole is provided in the sliding seat, and an internal thread matching the external thread of the transmission screw 22 is provided in the through hole, and the transmission screw 22 is threadedly connected to the sliding seat so that when the transmission screw 22 rotates, the sliding seat can be driven to move along the transmission screw 22; the controller is electrically connected to the driving motor 21 to control the operation of the driving motor 21; the driving motor 21 is connected to the transmission screw 22 to drive the transmission screw 22 to rotate, drive the sliding seat to move up and down, and drive the transmission roller 23 to move up and down through the sliding seat.

[0033] Furthermore, there are two sliding seats, which are respectively located on both sides of the transmission roller 23. One end of the roller shaft of the transmission roller 23 is inserted into one of the sliding seats, and the other end of the roller shaft of the transmission roller 23 is inserted into the other sliding seat, and the transmission roller 23 can rotate relative to the sliding seat to transmit the paper tape 300. Each sliding seat is connected to a transmission screw 22, and the rotation of the transmission screw 22 drives the movement of the corresponding sliding seat.

[0034] In the present invention, the direction of movement of the sliding seat is controlled by controlling the forward and reverse rotation of the motor shaft of the driving motor 21 to control the rotation direction of the transmission screw 22. For example, when the motor shaft rotates forward, the sliding seat moves upward, and when the motor shaft rotates reversely, the sliding seat moves downward.

[0035] It should be noted that, in the present embodiment, the driving device realizes the up and down movement of the sliding seat by the cooperation between the transmission screw 22 and the sliding seat; in other embodiments, the up and down movement of the sliding seat can be realized by the cooperation between the ball screw and the sliding seat, or other driving methods can be used to drive the sliding seat to move up and down.

[0036] In an optional embodiment, the first traction mechanism includes a first traction roller 11 and a first pressing roller 12, wherein the first pressing roller 12 is disposed above the first traction roller 11. The paper tape 300 is transmitted through the first traction roller 11, and the paper tape 300 is pressed between the first pressing roller 12 and the first traction roller 11 through the first pressing roller 12, so that the paper tape 300 follows the first traction roller 11 in transmission.

[0037] In an optional embodiment, the second traction mechanism includes a second traction roller 32 and a second pressing roller 31, and the second pressing roller 31 is disposed above the second traction roller 32. The paper tape 300 is transmitted through the second traction roller 32, and the paper tape 300 is pressed between the second pressing roller 31 and the second traction roller 32 through the second pressing roller 31, so that the paper tape 300 follows the second traction roller 32 for transmission.

[0038] In an optional embodiment, the tension detection device includes a tension detection roller 41 and a tension detection sensor 42 , and the tension detection sensor 42 is disposed on the tension detection roller 41 .

[0039] Further, the controller is connected to the tension detection sensor 42 to receive the detection signal of the tension detection sensor 42, and controls the operation of the driving device according to the detection signal of the tension detection sensor 42. Specifically, when the tension detected by the tension detection device exceeds a preset threshold, the controller receives the detection signal and controls the driving device to drive the transmission roller 23 to move upward, so as to increase the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200, and buffer the tension of the paper tape.

[0040] The control method of the dual traction mechanism of the present invention is used to control the dual traction mechanism as described above, and the control method comprises:

[0041] The paper tape 300 conveyed by the unwinding mechanism 100 is transmitted by the first traction mechanism;

[0042] The paper tape 300 transmitted by the first traction mechanism is transmitted to the second traction mechanism via the buffer mechanism;

[0043] The paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 via the tension detection device by using the second traction mechanism;

[0044] When the die-cutting paper feeding mechanism 200 starts feeding paper, the buffer mechanism controls the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 to increase; when the die-cutting paper feeding mechanism 200 finishes feeding paper, the buffer mechanism controls the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 to decrease.

[0045] By traction-transmitting the paper tape 300 conveyed from the unwinding mechanism 100 through the first traction mechanism, the influence of the paper tape tension fluctuation of the unwinding mechanism 100 on the tension of the paper tape conveyed to the die-cutting paper feeding mechanism 200 can be reduced, so that the paper tape 300 can run stably; by controlling the speed at which the paper tape 300 is conveyed to the die-cutting paper feeding mechanism 200 through the buffer mechanism, the paper tape tension can be stabilized, so that the paper tape 300 can run stably, and the paper tape 300 can be prevented from accumulating and jamming in the die-cutting paper feeding mechanism 200; by conveying the paper tape 300 through the second traction mechanism, the tension of the paper tape 300 before entering the die-cutting paper feeding mechanism 200 can be guaranteed to be stable, thereby improving the paper feeding stability of the die-cutting paper feeding mechanism 200.

[0046] In an optional embodiment, when the die-cutting paper feeding mechanism 200 starts feeding paper, the step of increasing the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 by the buffer mechanism includes: using a driving device to drive the transmission roller 23 to move upward to shorten the length of the paper tape between the buffer mechanism and the second traction mechanism. Specifically, the driving motor 21 drives the transmission screw 22 to rotate, and while the transmission screw 22 rotates, it drives the sliding seat to move upward, and the sliding seat drives the transmission roller 23 to move upward, so that the length of the paper tape between the buffer mechanism and the second traction mechanism is shortened, thereby increasing the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism 200. When the transmission roller 23 moves upward, the operating speed of the die-cutting paper feeding mechanism increases, which is higher than the operating speed of the first traction mechanism and the second traction mechanism, so that the paper tape stored between the buffer mechanism and the second traction mechanism is quickly transmitted to the die-cutting platform for die-cutting processing.

[0047] In an optional embodiment, when the die-cutting paper feeding mechanism 200 finishes feeding paper, the step of reducing the speed of the paper tape 300 transmitted to the die-cutting paper feeding mechanism 200 by the buffer mechanism includes: using a driving device to drive the transmission roller 23 to move downward to lengthen the length of the paper tape between the buffer mechanism and the second traction mechanism. Specifically, the driving motor 21 drives the transmission screw 22 to rotate, and while the transmission screw 22 rotates, it drives the sliding seat to move downward, and the sliding seat drives the transmission roller 23 to move downward, so that the length of the paper tape between the buffer mechanism and the first traction mechanism is lengthened, thereby reducing the speed of the paper tape 300 transmitted to the die-cutting paper feeding mechanism 200. When the transmission roller 23 moves downward, the operating speed of the die-cutting paper feeding mechanism is reduced, which is lower than the operating speed of the first traction mechanism and the second traction mechanism, so that a certain length of paper tape is stored between the buffer mechanism and the second traction mechanism, and the die-cutting paper feeding mechanism does not stop running, waiting for the die-cutting platform to perform die-cutting processing on the paper tape.

[0048] In an optional embodiment, the control method also includes: when the tension detected by the tension detection device exceeds a preset threshold value, the buffer mechanism controls the speed at which the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200 to increase, so as to avoid excessive tension before the paper tape 300 is transmitted to the die-cutting paper feeding mechanism 200.

[0049] In summary, the embodiment of the present invention provides a dual traction mechanism and a control method thereof, which stabilizes the tension of the paper tape 300 output from the unwinding mechanism 100 by means of a first traction mechanism, and divides the tension of the paper tape 300 of the unwinding mechanism 100 and the tension of the paper tape 300 of the dual traction mechanism and the die-cutting paper feeding mechanism 200 into sections, thereby reducing the influence of the tension fluctuation of the paper tape of the unwinding mechanism 100 on the tension of the paper tape delivered to the die-cutting paper feeding mechanism 200, so that the paper tape 300 runs stably. The second traction mechanism can ensure that the tension of the paper tape 300 before entering the die-cutting paper feeding mechanism 200 is stable, thereby improving the paper feeding stability of the die-cutting paper feeding mechanism 200. The buffer mechanism is provided to buffer the transmission speed of the paper tape to ensure the stable operation of the paper tape.

[0050] 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 double traction mechanism, characterized in that: The double traction mechanism is arranged between the unwinding mechanism and the die-cutting and paper-feeding mechanism, and the double traction mechanism comprises: A first traction mechanism, a buffer mechanism, a second traction mechanism and a tension detection device are arranged in sequence, wherein the first traction mechanism is used to transmit the paper tape conveyed by the unwinding mechanism and is located obliquely above one side of the buffer mechanism; the buffer mechanism is used to buffer the transmission speed of the paper tape to lengthen or shorten the length of the paper tape between the buffer mechanism and the second traction mechanism; the second traction mechanism is used to transmit the paper tape conveyed by the buffer mechanism and is located obliquely above the other side of the buffer mechanism; the tension detection device is used to detect the tension of the paper tape before it is transmitted to the die-cutting paper feeding mechanism; the paper tape transmitted by the second traction mechanism is transmitted to the die-cutting paper feeding mechanism via the tension detection device; The buffer mechanism includes a controller, a driving device and a transmission roller, wherein the controller is electrically connected to the driving device, and the driving device is connected to the transmission roller to drive the transmission roller to move up and down; when the transmission roller moves upward, the operating speed of the die-cutting and paper-feeding mechanism increases, which is higher than the operating speeds of the first traction mechanism and the second traction mechanism; when the transmission roller moves downward, the operating speed of the die-cutting and paper-feeding mechanism decreases, which is lower than the operating speeds of the first traction mechanism and the second traction mechanism; When the tension detected by the tension detection device exceeds a preset threshold, the controller receives a detection signal and controls the driving device to drive the transmission roller to move upward to increase the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism and buffer the tension of the paper tape; The first traction mechanism comprises a first traction roller and a first pressure roller, wherein the first pressure roller is arranged above the first traction roller; the second traction mechanism comprises a second traction roller and a second pressure roller, wherein the second pressure roller is arranged above the second traction roller.

2. The double traction mechanism according to claim 1, characterized in that: The driving device includes a driving motor, a transmission screw and a sliding seat, the transmission roller is installed on the sliding seat; the transmission screw is connected to the sliding seat; the driving motor is connected to the transmission screw to drive the transmission screw to rotate and drive the sliding seat to move up and down.

3. The dual traction mechanism according to claim 1, characterized in that: The tension detection device includes a tension detection roller and a tension detection sensor, and the tension detection sensor is arranged on the tension detection roller.

4. A control method for a dual traction mechanism according to any one of claims 1 to 3, characterized in that: include: The paper tape conveyed by the unwinding mechanism is transmitted by the first traction mechanism; Transmitting the paper tape transmitted by the first traction mechanism to the second traction mechanism via the buffer mechanism; The second traction mechanism is used to transmit the paper tape to the die-cutting paper feeding mechanism through the tension detection device; When the die-cutting paper feeding mechanism starts feeding paper, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to increase; when the die-cutting paper feeding mechanism finishes feeding paper, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to decrease.

5. The control method of the dual traction mechanism according to claim 4, characterized in that: When the die-cutting paper feeding mechanism starts feeding paper, the step of increasing the speed at which the buffer mechanism controls the paper tape to be transmitted to the die-cutting paper feeding mechanism comprises: The driving device is used to drive the transmission roller to move upward, so as to shorten the length of the paper tape between the buffer mechanism and the second traction mechanism.

6. The control method of the dual traction mechanism according to claim 4, characterized in that: When the die-cutting paper feeding mechanism finishes feeding paper, the step of the buffer mechanism controlling the speed of the paper tape being transmitted to the die-cutting paper feeding mechanism to be reduced comprises: The driving device is used to drive the transmission roller to move downward, so as to lengthen the length of the paper tape between the buffer mechanism and the second traction mechanism.

7. The control method of the dual traction mechanism according to claim 4, characterized in that: The control method further includes: when the tension detected by the tension detection device exceeds a preset threshold value, the buffer mechanism controls the speed at which the paper tape is transmitted to the die-cutting paper feeding mechanism to increase.

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