Discharging tension control mechanism

Abstract

The utility model relates to the technical field of gravure printing machines, in particular to a discharging tension control mechanism which comprises a machine head wall plate and two feeding plates arranged on the machine head wall plate, a charging mechanism is movably arranged on the feeding plates, the charging mechanism can rotate and slide relative to the feeding plates, and the feeding plates are arranged on the machine head wall plate. A magnetic powder brake connected with the charging mechanism is arranged on one feeding plate; a driving source is further installed on the feeding plate and connected with the magnetic powder brake through a transmission assembly. According to the technical scheme, material pressure is detected and collected through the detection unit, in the process that the feeding roller drives the charging mechanism and the linkage assembly and the transmission assembly conduct power transmission, when the tensioning degree needs to be controlled, the transmission assembly transmits power of the driving source into the linkage assembly, and the tensioning degree is controlled. The linkage assembly achieves the effects of assisting in controlling tightness of materials, improving printing precision and stabilizing printing by transmitting power of the magnetic powder brake and the driving source.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gravure printing machine, concretely relates to a material discharging tension control mechanism. BACKGROUND

[0002] The gravure printing machine is a machine using a gravure to print, and when printing a material such as a film bag or a clothing bag by using the gravure printing machine, the tension of the material needs to be limited in the printing stage because the material has a certain deformation property.

[0003] In the prior art, the material collecting end is used as the driving traction for collecting the material, and if only traction is used, the material roll will be loose in the printing process, and a brake mechanism is needed to limit the tightness of the material at this time, and the magnetic powder brake is a brake mechanism, which controls the tension of the material by adding the magnetic powder brake to the material discharging mechanism to prevent the material from being too loose or too tight.

[0004] However, in actual operation, the material roll becomes smaller in diameter after processing, and thus the weight gradually becomes smaller, and when the material roll is small to a certain extent, the material is too light at the end, and the brake of the magnetic powder brake is too heavy, so that the weight range of the magnetic powder brake is not met, resulting in unstable tension and affecting the printing accuracy. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the material discharging tension control mechanism is provided, which solves the problem of unstable printing caused by the brake of the magnetic powder brake being too tight due to the material being too light by using a servo motor to assist in controlling the power of the material.

[0006] To solve the problems in the prior art, the utility model provides a material discharging tension control mechanism, which comprises a head wall plate, two feeding plates arranged on the head wall plate, a material loading mechanism movably arranged on the feeding plate, and the material loading mechanism can rotate and slide relative to the feeding plate.

[0007] One of the feeding plates is provided with a magnetic powder brake connected with the material loading mechanism.

[0008] A driving source is further installed on the feeding plate, and the driving source is connected with the magnetic powder brake through a transmission assembly.

[0009] A detection unit is installed on the head wall plate and communicates with the driving source, and is used for collecting the tension data of the printed film and feeding back to the driving source.

[0010] Preferably, the driving source is a servo motor, the transmission assembly comprises a synchronous wheel large gear arranged on the side of the feeding plate away from the magnetic powder brake, the side of the feeding plate away from the magnetic powder brake is provided with a synchronous belt small gear driven by the servo motor, and the synchronous wheel large gear and the synchronous belt small gear are connected through a transmission belt.

[0011] Preferably, the feeding mechanism is further provided with a linkage assembly, the linkage assembly comprises a first gear arranged on the surface of the synchronous wheel large gear, a second gear arranged on the surface of the feeding plate and engaged with the first gear, and a third gear arranged on the surface of the feeding mechanism and engaged with the second gear.

[0012] Preferably, the feeding plate is provided with a detection assembly for detecting the rotation speed of the linkage assembly, the detection assembly comprises a sensing point arranged on the surface of the first gear, and the feeding plate is provided with a sensor matched with the sensing point and used for detecting the rotation speed of the first gear.

[0013] Preferably, the magnetic powder brake further comprises a magnetic powder shaft, and the two ends of the surface of the magnetic powder shaft are provided with first flat keys, and the two first flat keys are connected with the magnetic powder brake and the first gear respectively.

[0014] Preferably, the feeding plate is provided with a bearing seat, the bearing seat is provided with an air cylinder used for driving the feeding mechanism to reciprocate in the radial direction, the air cylinder is rotationally connected with the inner end of the feeding mechanism, the inner side of the third gear rotationally arranged in the inner cavity of the bearing seat is formed with a second flat key, and the feeding mechanism is provided with a limiting groove in sliding connection with the second flat key.

[0015] Preferably, the inner cavity of the bearing seat is provided with a matching bearing, and the feeding mechanism is matched and arranged in the inner cavity of the bearing seat through the matching bearing.

[0016] Preferably, the feeding plate is provided with a gear shaft, one end of the gear shaft is fixedly connected with the surface of the feeding plate, and the other end of the gear shaft is provided with a connecting bearing used for matched arrangement with the second gear.

[0017] Preferably, the detection unit comprises a roller rotationally connected with the machine head wall plate, and the machine head wall plate is provided with a tension detection module used for collecting tension data of the roller.

[0018] The utility model discloses the beneficial effect compared with prior art is:

[0019] 1.The utility model discloses a printing process, in the feeding roll drive loading mechanism, the process of power transmission by linkage assembly and transmission assembly, the first gear rotates and detects the rotation speed of first gear through the cooperation of inductive point and sensor, and the pressure of material is detected and collected through detection unit, along with the printing material roll diameter and weight gradually smaller, the pressure data collected will also change, when needing to adjust tension, the driving source correspondingly control the rotation speed of synchronous belt small wheel, and the driving speed of driving source is adjusted to transmit the power of driving source to linkage assembly through transmission assembly, and linkage assembly transmits the power of magnetic powder brake and driving source, reaches the loose and tight of auxiliary control material, improves the printing precision and stabilizes the effect of printing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a first perspective overall three-dimensional structure diagram of material tension control mechanism.

[0021] Figure 2 It is a second perspective overall three-dimensional structure diagram of material tension control mechanism.

[0022] Figure 3 It is a structure overhead sectional view of material tension control mechanism.

[0023] Figure 4 It is a head wallboard and detection unit structure three-dimensional schematic view of material tension control mechanism.

[0024] Figure 5 It is a detection unit structure schematic view of material tension control mechanism.

[0025] Figure 6 It is a tension working state schematic view in the process of material film wearing.

[0026] The reference signs in the drawing are: 1, feeding plate;2, magnetic powder brake;3, first flat key;4, magnetic powder shaft;5, synchronous wheel big wheel;6, transmission belt;7, synchronous belt small wheel;8, servo motor;9, first gear;10, inductive point;11, sensor;12, connecting bearing;13, gear shaft;14, second gear;15, bearing seat;16, matching bearing;17, second flat key;18, third gear;19, loading mechanism;20, head wallboard;21, tension detection module;22, cylinder;23, air cylinder. DETAILED DESCRIPTION

[0027] In order to further understand the characteristics, technical means and specific purposes and functions reached by the utility model, the utility model is described in further detail below in combination with the drawings and specific embodiments.

[0028] Reference Figures 1-6As shown, a kind of material tension control mechanism, including head wallboard 20, be located in the head wallboard 20, fixedly installed on the feeding end of head wallboard 20 Two feeding plates 1 And fixedly installed on the one end of feeding plate 1 Bearing seat 15, the installation position of bearing seat 15 and feeding plate 1 It is perpendicular to each other, feeding plate 1 It is rotatably installed on the bearing seat 15 for the loading mechanism 19 for being connected with the one end of feeding shaft, the loading mechanism 19 It can rotate and slide relative to the feeding plate 1, wherein the feeding shaft is mature prior art (not shown in the figure), therefore do not make too much description.

[0029] One side of the feeding plate 1 Wherein is provided with magnetic powder brake 2, the structure of magnetic powder brake 2 It is mainly composed of brake frame, brake piece and operating device, and this structure is mature prior art, therefore do not make too much description.

[0030] The feeding plate 1 It is also installed on the driving source, and the driving source is connected with the magnetic powder brake 2 By transmission assembly, transmission assembly is used to transmit the resistance sent by magnetic powder brake 2, the other side of feeding plate 1 It is provided with transmission assembly for transmitting the resistance sent by magnetic powder brake 2, and the power emitted by the driving source can also be transmitted by the transmission assembly, and the driving source can drive the transmission assembly to rotate to control the rotation speed.

[0031] Detection unit, installed on the head wallboard 20, and with the driving source establishes communication, for the tension data of printing film is collected and is fed back to driving source, the pressure data detected by detection unit is uploaded to the system (prior art is not described too much) capable of collecting pressure data and adjusting the running speed of driving source according to the data range set in the system, and the running speed of driving source is determined by the numerical range set by the system, to achieve the control of the tension degree of material.

[0032] In the embodiment, the driving source is servo motor 8, and the servo motor 8 is prior art, so too much explanation is not made, and the transmission assembly includes synchronizing wheel large wheel 5 rotatably arranged on the front side of feeding plate 1, the front side of feeding plate 1 Rotatably provided with synchronous belt small wheel 7 driven by servo motor 8, and the synchronous wheel large wheel 5 And synchronous belt small wheel 7 It is drivenly connected through transmission belt 6, so that the synchronous belt small wheel 7 It is driven to rotate by servo motor 8, and the synchronous wheel large wheel 5 It can be driven to rotate by the transmission of transmission belt 6.

[0033] In the embodiment, the feeding mechanism 19 is further provided with a linkage assembly, which comprises a first gear 9 arranged on the surface of the large gear 5 of the synchronous wheel, the power generated by the magnetic powder brake 2 and the servo motor 8 can be transmitted by the first gear 9 through the rotation of the large gear 5 of the synchronous wheel, a second gear 14 arranged on one side of the feeding plate 1 and engaged with the first gear 9, and a third gear 18 arranged on the surface of the feeding mechanism 19 and engaged with the second gear 14, the second gear 14 is driven to rotate by the first gear 9, the third gear 18 is driven to rotate by the second gear 14, the power generated by the magnetic powder brake 2 and the servo motor 8 is transmitted to the feeding mechanism 19 for film feeding through the third gear 18.

[0034] In the embodiment, the feeding plate 1 is provided with a detection assembly for detecting the rotation speed of the linkage assembly, which comprises a sensing point 10 arranged on the surface of the first gear 9, the sensing point 10 is used as the positioning point of the rotation angle of the magnetic powder brake 2 when the first gear 9 rotates, the surface of the feeding plate 1 is provided with a sensor 11 for detecting the rotation speed of the first gear 9 and cooperating with the sensing point 10, the sensor 11 is installed on the surface of the feeding plate 1 through a mounting bracket and there is a certain distance between the sensor 11 and the first gear 9, and the sensor 11 can sense and detect the rotation speed of the first gear 9 by cooperating with the sensing point 10, the rotation speed is calculated according to the time required for the rotation of the first gear 9, so as to facilitate the adjustment of the rotation speed of the first gear 9.

[0035] In the embodiment, the magnetic powder brake 2 further comprises a magnetic powder shaft 4, one end of the magnetic powder shaft 4 is connected with the magnetic powder brake 2, the other end penetrates through the transmission assembly and is connected with the linkage assembly, both ends of the surface of the magnetic powder shaft 4 are provided with first flat keys 3, the two first flat keys 3 are respectively connected with the magnetic powder brake 2 and the first gear 9, the first flat key 3 is a mature existing technology, which is used as a connecting component between the shaft and the gear, and is used as a positioning component of the shaft and the gear, so it is not explained in detail.

[0036] In the embodiment, the feeding plate 1 is provided with a bearing seat 15, the bearing seat 15 is provided with a cylinder 23 for driving the feeding mechanism 19 to reciprocate in the radial direction, and the cylinder 23 is rotationally connected with the inner end of the feeding mechanism 19, so as to ensure that the rotation of the feeding mechanism 19 is not affected during the movement of the feeding mechanism 19 in the radial direction driven by the cylinder 23. Through the position adjustment of the feeding mechanism 19, the effect of clamping one end of the feeding roller can be met. In actual use, the two ends of the feeding roller can be clamped and fixed by the two feeding mechanisms 19. The second flat key 17 is formed in the inner side of the third gear 18 rotationally installed in the inner cavity of the bearing seat 15, and the limiting groove in sliding connection with the second flat key 17 is formed in the feeding mechanism 19. The second flat key 17 is used to transmit the resistance of the magnetic powder brake 2 and the servo motor 8 to the feeding mechanism 19 for film feeding through the second flat key 17 when the third gear 18 transmits the resistance. The second flat key 17 is also a mature prior art as described above, and therefore will not be explained in detail.

[0037] In the embodiment, the inner cavity of the bearing seat 15 is provided with a matching bearing 16, and the feeding mechanism 19 is matched and installed in the inner cavity of the bearing seat 15 through the matching bearing 16.

[0038] It can be understood that the two feeding mechanisms 19 are clamped and fixed to the two ends of the feeding roller through the extension and retraction of the cylinder 23. Through the rotation of the feeding roller, the feeding roller can be rotated by the linkage assembly, and the power of the servo motor 8 driving the transmission assembly will not affect the rotation speed of the feeding roller, that is, the output of the servo motor 8 and the rotation of the roller remain relatively constant, or the transmission is balanced. In order to control the rotation speed of the magnetic powder shaft 4, the output power of the servo motor 8 is correspondingly controlled to control the tension of the material, so that the tension is in a stable and controllable range, thereby reducing the uncertainty of the material roll during discharging, improving the stability of the machine during printing, and improving the printing precision and efficiency.

[0039] In the embodiment, the feeding plate 1 is provided with a gear shaft 13, one end of the gear shaft 13 is fixedly connected with the surface of the feeding plate 1, and the other end of the gear shaft 13 is provided with a connecting bearing 12 for cooperating with the second gear 14.

[0040] In the embodiment, the detection unit comprises a rotating drum 22 connected to the head wall plate 20, two tension detection modules 21 are arranged on the head wall plate 20 for collecting tension data of the rotating drum 22, the two tension detection modules 21 are respectively connected to two ends of the rotating drum 22, the tension detection module 21 is used for detecting the material pressure passing through the rotating drum 22, and the rotation speed of the servo motor 8 is adjusted according to the detected pressure value.

[0041] Working principle: in the printing process, the feeding roller drives the feeding mechanism, and the power is transmitted through the linkage assembly and the transmission assembly. The rotation speed of the first gear 9 is detected through the cooperation of the induction point 10 and the sensor 11. The material pressure is detected and collected through the detection unit. As the diameter and weight of the printing material roll gradually decrease, the collected pressure data will also change. When the tension needs to be adjusted, the servo motor correspondingly controls the rotation speed of the synchronous belt small wheel 7. The servo motor 8 adjusts the driving speed, and the power of the servo motor 8 is transmitted to the linkage assembly through the transmission assembly. The linkage assembly transmits the power of the magnetic powder brake and the servo motor 8, so as to assist in controlling the tension of the material and improve the printing precision and the effect of stable printing.

[0042] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A kind of material tension control mechanism, including head wallboard (20), two feeding plates (1) on the head wallboard (20), the feeding plate (1) is movably provided with loading mechanism (19), the loading mechanism (19) can rotate and slide relative to the feeding plate (1), it is characterized in that: One of the feeding plate (1) is provided with magnetic powder brake (2) connected with the loading mechanism (19); The feeding plate (1) is also installed with driving source, and the driving source is connected with the magnetic powder brake (2) through transmission assembly; Detection unit is installed on the head wallboard (20), and with the driving source is established communication, for the tension data of printing film is collected and is fed back to driving source.

2. A material web tension control mechanism according to claim 1, wherein The driving source is servo motor (8), the transmission assembly includes the synchronous wheel large wheel (5) on the side of the feeding plate (1) away from the magnetic powder brake (2), the feeding plate (1) is provided with the synchronous belt small wheel (7) driven by the servo motor (8) on the side away from the magnetic powder brake (2), and the synchronous wheel large wheel (5) and the synchronous belt small wheel (7) are driven connected through transmission belt (6).

3. A material web tension control mechanism according to claim 2, wherein The loading mechanism (19) is also provided with linkage assembly, the linkage assembly includes the first gear (9) on the surface of the synchronous wheel large wheel (5), the second gear (14) on the surface of the feeding plate (1) and the first gear (9) is engaged, the third gear (18) on the surface of the loading mechanism (19) and the second gear (14) is engaged.

4. A material web tension control mechanism according to claim 3, wherein The feeding plate (1) is provided with detection assembly for detecting the rotation speed of the linkage assembly, and the detection assembly includes sensing point (10) on the surface of the first gear (9), and the feeding plate (1) is provided with sensor (11) matched with the sensing point (10) for detecting the rotation speed of the first gear (9).

5. A material web tension control mechanism according to claim 3, wherein The magnetic powder brake (2) further includes magnetic powder shaft (4), and the first flat key (3) is arranged at both ends of the surface of the magnetic powder shaft (4), and the first flat key (3) is connected with the magnetic powder brake (2) and the first gear (9) respectively.

6. A material web tension control mechanism according to claim 3, wherein The feeding plate (1) is provided with bearing seat (15), the bearing seat (15) is provided with air cylinder (23) for driving the loading mechanism (19) to reciprocate along the radial direction, and the air cylinder (23) is rotatably connected with the inner end of the loading mechanism (19), the second flat key (17) is formed in the inner side of the third gear (18) rotatably installed in the inner cavity of the bearing seat (15), and the limiting slot slidably connected with the second flat key (17) is formed in the loading mechanism (19).

7. A supply tension control mechanism according to claim 6, wherein The inner cavity of the bearing seat (15) is provided with matching bearing (16), and the loading mechanism (19) is fitted and installed in the inner cavity of the bearing seat (15) through the matching bearing (16).

8. A material web tension control mechanism according to claim 3, wherein Gear shaft (13) is provided on the feeding plate (1), one end of the gear shaft (13) is fixedly connected with the surface of the feeding plate (1), the other end of the gear shaft (13) is provided with a connecting bearing (12) for cooperating with the second gear (14) installation.

9. A material web tension control mechanism according to claim 1 wherein, The detection unit comprises a roller (22) rotatably connected to the head wall plate (20), and the head wall plate (20) is provided with a tension detection module (21) for collecting tension data of the roller (22).

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