Machine head discharging tension control mechanism of photogravure press

Abstract

The utility model relates to the technical field of gravure printing machines, in particular to a gravure printing machine head discharging tension control mechanism which comprises a supporting wall plate and two feeding plates. The two feeding plates are installed on the supporting wall plate in a sliding mode, and the distance between the two feeding plates can be adjusted through an adjusting piece. The two feeding plates are each rotationally provided with a plug piece used for being connected with the corresponding discharging roller in an abutting mode. Wherein one feeding plate is provided with a magnetic powder brake, and the magnetic powder brake is connected with the plug piece. According to the technical scheme, the pressure of a material is transmitted through the roller, the tension detection module detects the pressure of the material passing through the roller and uploads the pressure to the system, the driving speed of the servo motor is correspondingly adjusted according to the uploaded pressure data, and the tensioning degree of the material can be controlled through cooperation of the driving mechanism and the transmission mechanism; and the rotation speed of the magnetic powder shaft is detected through cooperation of the induction point and the sensor, and the rotation speed of the magnetic powder shaft can be induced so as to adjust the rotation speed of the magnetic powder shaft.

Description

TECHNICAL FIELD

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

[0002] In the field of gravure printing, a gravure printing machine is a device specifically designed for printing through a gravure. This technology is widely used in the printing process of soft packaging materials such as film bags and garment bags. Since these printing materials usually have certain deformation properties, it is necessary to accurately control the tension of the printing materials during the printing stage to ensure the printing quality.

[0003] In the prior art, the tension of the printing material is mainly achieved through active traction at the material receiving end. However, relying solely on traction force, the material may become loose during the printing process, which will affect the accuracy and effectiveness of printing. To solve this problem, a brake-like mechanism, a magnetic powder brake, is usually installed on the material feeding mechanism to control the tension of the material and prevent it from being too loose or too tight.

[0004] The magnetic powder brake controls the braking force by adjusting the distribution of magnetic powder, thereby affecting the tension of the material. However, in actual operation, as the material roll is processed, its diameter gradually decreases, and its weight also decreases. When the weight of the material roll decreases to a certain extent, the weight range set by the magnetic powder brake is no longer applicable. Specifically, if the brake force of the magnetic powder brake is too heavy, it will cause unstable tension, which not only affects the printing accuracy, but also may affect the printing progress, increasing production cost and time.

[0005] In view of the limitations of the magnetic powder brake in handling light materials in the prior art, the utility model aims to provide a gravure printing machine head material feeding tension control mechanism to adapt to changes in the weight of the material roll and ensure the stability of the material tension during the entire printing process, thereby improving printing accuracy and efficiency. SUMMARY

[0006] To solve the above problems, a gravure printing machine head material feeding tension control mechanism is provided, which controls the tension of the material through a servo motor, so that the tension control mechanism is within a stable and controllable range, solving the problems of reducing material feeding uncertainty and unstable tension.

[0007] To solve the problems in the prior art, the utility model provides a gravure printing machine head material feeding tension control mechanism, which comprises a support wall plate and two feeding plates slidably installed on the support wall plate and capable of being adjusted in distance by an adjusting member, a plug member for abutting against the material feeding roller is rotatably installed on each of the two feeding plates;

[0008] One of the feeding plates is provided with a magnetic powder brake connected with the plug element;

[0009] The feeding plate provided with the magnetic powder brake is also installed with a driving mechanism in transmission connection with the magnetic powder brake, and the driving mechanism is in communication with a detection unit provided on the support wall plate for collecting tension data.

[0010] Preferably, the support wall plate is provided with a roller, and the support wall plate is provided with a detection unit for collecting tension data of the roller.

[0011] Preferably, the plug element comprises a plug shaft provided on the feeding plate, and one end of the plug shaft is provided with a plug abutting against the feeding roller.

[0012] Preferably, the magnetic powder brake further comprises a rotatable magnetic powder shaft, and the front end of the magnetic powder shaft penetrates into the inside of the feeding plate, the plug shaft penetrates through the feeding plate, and the front end of the plug shaft is located outside the feeding plate.

[0013] Preferably, the driving mechanism comprises a servo motor provided on the feeding plate, the output shaft of the servo motor penetrates into the inside of the feeding plate, the output shaft of the servo motor is provided with a second transmission wheel, the magnetic powder shaft is provided with a first transmission wheel, and the second transmission wheel and the first transmission wheel are in transmission connection through a first transmission belt.

[0014] Preferably, the magnetic powder brake and the plug element are connected through a transmission mechanism, the transmission mechanism comprises a third transmission wheel provided on the magnetic powder shaft and a fourth transmission wheel provided on the plug shaft, and the third transmission wheel and the fourth transmission wheel are in transmission connection through a second transmission belt.

[0015] Preferably, the rear end of the magnetic powder shaft penetrates through the magnetic powder brake, and the rear end of the surface of the magnetic powder shaft is provided with a sensing point, a sensor provided on the magnetic powder brake is used for cooperating with the sensing point for sensing, the sensor is installed on the magnetic powder brake through an installation support, and corresponds to the sensing point.

[0016] Preferably, the front side of the feeding plate is provided with a first bearing seat, the first bearing seat is provided with a bearing connected with the front end of the plug shaft, for improving the rotation stability of the bearing, the rear side of the feeding plate is provided with a second bearing seat, the second bearing seat is provided with a plane bearing and a bearing for receiving a transverse force, and the rear end of the surface of the plug shaft is connected with the plane bearing and the bearing.

[0017] Preferably, the surface of the plug shaft is provided with a first flat key for positioning with the plug shaft, the surface of the plug shaft is provided with a second flat key for positioning with the fourth transmission wheel, and the surface of the magnetic powder shaft is provided with three third flat keys for positioning with the third transmission wheel, the first transmission wheel and the magnetic powder brake respectively.

[0018] Preferably, the outer cylindrical surface of the plug is conical, and the plug is further formed with a countersunk through hole for cooperating with the front end of the plug shaft.

[0019] Preferably, the surface of the plug shaft is provided with a first flat key for positioning with the plug shaft, the surface of the plug shaft is provided with a second flat key for positioning with the fourth transmission wheel, and the surface of the magnetic powder shaft is provided with three third flat keys for positioning with the third transmission wheel, the first transmission wheel and the magnetic powder brake respectively.

[0020] The beneficial effects of the utility model compared with the prior art are:

[0021] 1. In the printing process, the pressure of the material transmitted by the roller is detected by the tension detection module, the material pressure transmitted from the roller is uploaded to the system, the driving speed of the servo motor is adjusted according to the uploaded pressure data, the driving mechanism and the transmission mechanism are matched, the control of the material tension degree is achieved, and the rotation speed of the magnetic powder shaft is detected by combining the inductive point and the sensor, the rotation speed of the magnetic powder shaft is sensed, and the rotation speed is adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a kind of concave printing machine head support wallboard of discharging tension control mechanism, tension detection module, roller and the whole three-dimensional structure diagram of feeding plate.

[0023] Figure 2 It is a kind of concave printing machine head discharging tension control mechanism feeding plate, plane bearing and magnetic powder brake three-dimensional structure diagram.

[0024] Figure 3 It is a kind of concave printing machine head discharging tension control mechanism sensor, inductive point and magnetic powder shaft three-dimensional structure diagram.

[0025] Figure 4 It is a kind of concave printing machine head discharging tension control mechanism feeding plate structure top view sectional view.

[0026] Figure 5 It is a kind of concave printing machine head discharging tension control mechanism roller and tension detection module three-dimensional structure diagram.

[0027] Figure 6 It is the tension working state schematic diagram in the process of material membrane.

[0028] The reference signs in the drawings are: 1, support wallboard; 2, tension detection module; 3, roller; 4, feeding plate; 5, sensor; 6, sensing point; 7, magnetic powder brake; 8a, first flat key; 8b, second flat key; 8c, third flat key; 9, magnetic powder shaft; 10, first transmission wheel; 11, first transmission belt; 12, second transmission wheel; 13, servo motor; 14, third transmission wheel; 15, second transmission belt; 16, fourth transmission wheel; 17, first bearing seat; 18, bearing; 19, plug shaft; 20, second bearing seat; 21, flat bearing; 22, plug. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions achieved by the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments.

[0030] Since the printed material is a thin film bag, a stretchable material such as a clothing bag, and has certain deformation properties, it is necessary to add some mechanism to limit its tension degree during printing.

[0031] The material receiving end, i.e. the feeding roller, is the main traction material receiving (not shown here), and the feeding end needs to be provided with a magnetic powder brake 7 for deceleration, so as to achieve the effect of tightening the material. However, due to the light weight of the material, the brake of the magnetic powder brake 7 is too tight, which leads to unstable printing of the material. At this time, a servo motor 13 is added to the feeding end to assist in controlling the power of the material, so as to achieve the purpose of improving the precision and stable printing.

[0032] EXPLANATION OF THE DRAWINGS Figure 6 The material is fed through the roller 3, and the pressure of the material transmitted by the roller 3 is detected by the tension detection module 2. The detected material pressure is transmitted to the system, and the system transmits the set value range to determine the running speed of the servo motor 13, so as to control the tension degree of the material.

[0033] Referring to Figures 1-6As shown, a gravure printing machine head feed tension control mechanism, including a support wall plate 1 and two feed plates 4 slidingly mounted on the surface of the support wall plate 1, each of the two feed plates 4 is provided with a plug member rotatably mounted on the surface of the two feed plates 4 and can be adjusted by an adjusting member to adjust the distance between the two feed plates 4, the adjusting member can adjust the position of the two feed plates 4 so that the two feed plates 4 can move closer to or away from each other along the surface of the support wall plate 1, when the two feed plates 4 move closer to each other along the surface of the support wall plate 1, the feed roller can be clamped, the adjusting mechanism is not shown in the figure, and the specific structure of the adjusting member is not limited, which can be a lead screw, an electric sliding rail, a pneumatic telescopic rod or an electric telescopic rod, etc., the position distance adjustment of the two feed plates 4 can be used to clamp the feed roller;

[0034] The front side of one of the feed plates 4 is provided with a magnetic powder brake 7, the magnetic powder brake 7 mainly comprises a brake frame, a brake member and a control device, the magnetic powder brake 7 is a device structure known to those skilled in the art, therefore it is not described in detail, the magnetic powder brake 7 is connected with the plug member, under the condition that the plug member is driven to rotate by the feed roller, the plug member drives the magnetic powder brake 7 to rotate, and the rear side of the other feed plate 4 is only rotatably connected with a plug shaft 19 and a plug 22 without the magnetic powder brake 7.

[0035] The feed plate 4 provided with the magnetic powder brake 7 is also provided with a driving mechanism in transmission connection with the magnetic powder brake 7, and the driving mechanism communicates with a detection unit provided on the support wall plate 1 for collecting tension data.

[0036] When the plug member is driven to rotate by the feed roller, the plug member is connected with the magnetic powder brake 7, and the driving mechanism provides power to make it not affect the normal rotation of the magnetic powder brake 7, it should be noted that the rotation speed of the feed roller is the same as the power provided by the driving mechanism, which does not affect the normal rotation of the magnetic powder brake 7.

[0037] When the detection unit uploads the collected tension data to the system, the driving mechanism correspondingly adjusts the speed of driving the magnetic powder shaft 9 to control the tension of the material.

[0038] In this embodiment, the support wall plate 1 is provided with a roller 3, and the support wall plate 1 is provided with a detection unit for collecting tension data of the roller 3, preferably, the detection unit includes a tension detection module 2, which can upload the collected tension data to the system, the system has a tension data range, and the rotation rate of the magnetic powder shaft 9 can be adjusted according to the collected tension data, thereby facilitating subsequent improvement actions (the system is a mature prior art, therefore it is not described in detail).

[0039] In the embodiment, the plug member comprises a plug shaft 19 arranged on the feeding plate 4, the front end of the plug shaft 19 is arranged on the front side of the inner cavity of the feeding plate 4, and the rear end of the plug shaft 19 extends to the outside through the rear side of the feeding plate 4, one end of the plug shaft 19 is provided with a plug 22 abutting against the feeding roller, when the two feeding plates 4 slide towards each other along the surface of the support wall plate 1, the feeding roller can be clamped by the two plugs 22.

[0040] In the embodiment, the magnetic powder brake 7 comprises a rotatable magnetic powder shaft 9, the front end of the magnetic powder shaft 9 penetrates into the inner cavity of the feeding plate 4, the rear end of the magnetic powder shaft 9 penetrates through the magnetic powder brake 7 and is located outside the magnetic powder brake 7, the front end of the magnetic powder brake 7 is connected with the front side of the feeding plate 4, the plug shaft 19 penetrates through the feeding plate 4, and the front end of the plug shaft 19 is located outside the feeding plate 4.

[0041] In the embodiment, the outer circular surface of the plug 22 is conical, and the plug 22 is further provided with a countersunk through hole for cooperating with the front end of the plug shaft 19.

[0042] In the embodiment, the driving mechanism comprises a servo motor 13 arranged on the front side of the feeding plate 4, the output shaft of the servo motor 13 penetrates into the inside of the feeding plate 4, the output shaft of the servo motor 13 is provided with a second transmission wheel 12, the surface of the magnetic powder shaft 9 and located inside the feeding plate 4 is provided with a first transmission wheel 10, the second transmission wheel 12 and the first transmission wheel 10 are transmissionally connected through a first transmission belt 11, it should be noted that the power of the servo motor 13 can ensure that the rotation speed of the feeding shaft does not change under the transmission of the driving mechanism and the transmission mechanism, that is, the output of the servo motor 13 and the rotation roller remain relatively constant, or the transmission is balanced, and when the tension needs to be adjusted, it can be realized by changing the driving power of the servo motor 13.

[0043] In the embodiment, the magnetic powder brake 7 and the plug member are connected through a transmission mechanism, the transmission mechanism comprises a third transmission wheel 14 arranged on the surface of the magnetic powder shaft 9 and located inside the feeding plate 4, and a fourth transmission wheel 16 arranged on the surface of the plug shaft 19 and located inside the feeding plate 4, the third transmission wheel 14 and the fourth transmission wheel 16 are transmissionally connected through a second transmission belt 15, the third transmission wheel 14 and the first transmission wheel 10 have a certain spacing and do not affect each other, and in order to ensure stability, the front end of the magnetic powder shaft 9 penetrates into the inner cavity of the feeding plate 4 and is rotatably connected with the inner surface of the feeding plate 4 through a bearing, so as to improve the rotation stability of the magnetic powder shaft 9, it can be understood that the first transmission wheel 10, the first transmission belt 11, the second transmission wheel 12, the third transmission wheel 14, the second transmission belt 15 and the fourth transmission wheel 16 can also be replaced by gears and other means.

[0044] In this embodiment, the rear end of the magnetic powder shaft 9 penetrates the magnetic powder brake 7, and the rear end of the surface of the magnetic powder shaft 9 is provided with an inductive point 6, the front side of the magnetic powder brake 7 is provided with a sensor 5 for cooperating with the inductive point 6 for induction, the sensor 5 is installed on the magnetic powder brake 7 through a mounting bracket, and corresponds to the inductive point 6. Because the magnetic powder shaft 9 corresponds to the inductive point 6, the rotation speed of the magnetic powder shaft 9 can be inducted, and the rotation speed of the magnetic powder shaft 9 can be calculated by the time used for one revolution of the magnetic powder shaft 9, so as to adjust the rotation speed.

[0045] In this embodiment, the rear side of the feeding plate 4 is provided with a second bearing seat 20, the second bearing seat 20 is provided with a plane bearing 21 for receiving a transverse force, the rear end of the surface of the plug shaft 19 is connected with the plane bearing 21 and the bearing 18, and the rear end of the plug shaft 19 is located outside the second bearing seat 20.

[0046] In this embodiment, the front side of the feeding plate 4 is provided with a first bearing seat 17, the first bearing seat 17 is provided with a bearing 18 connected with the front end of the plug shaft 19, for improving the rotation stability of the bearing 18.

[0047] In this embodiment, the surface of the plug shaft 19 is provided with a first flat key 8a for positioning the plug shaft 19, the surface of the plug shaft 19 is provided with a second flat key 8b for positioning the fourth transmission wheel 16, and the surface of the magnetic powder shaft 9 is provided with three third flat keys 8c for positioning the third transmission wheel 14, the first transmission wheel 10 and the magnetic powder brake 7 respectively.

[0048] Working principle: in the material transmission process, the pressure of the material transmitted by the roller 3 is detected by the tension detection module 2, and the detected pressure is uploaded to the system, and the rotation speed of the servo motor 13 is adjusted according to the pressure, and the control of the tension of the material is achieved.

[0049] When the feeding shaft is clamped by the two plugs 22, the rotation of the feeding shaft will not be affected by adjusting the power of the servo motor 13. When the tension of the material needs to be controlled, the pressure data detected by the tension detection module 2 is uploaded to the system, and the rotation speed of the servo motor 13 is adjusted according to the tension data range in the system. When the rotation speed of the magnetic powder shaft 9 is adjusted by the first transmission wheel 10 driven by the second transmission wheel 12 and the first transmission belt 11, the plug shaft 19 is changed by the third transmission wheel 14, the second transmission belt 15 and the fourth transmission wheel 16, so as to assist the control of the power of the material, and the purpose of improving the precision and stabilizing the printing is achieved.

[0050] 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 tension control mechanism for the feeding head of a gravure printing machine, characterized in that: The device includes a support wall plate (1) and two feeding plates (4) that are slidably mounted on the support wall plate (1) and whose spacing can be adjusted by an adjustment component. Both feeding plates (4) are rotatably mounted with end caps for contacting the feeding roller. One of the feeding plates (4) is provided with a magnetic powder brake (7), which is connected to the end cap. The feeding plate (4) with the magnetic powder brake (7) is also provided with a drive mechanism that is pulsatorically connected to the magnetic powder brake (7). The drive mechanism communicates with a detection unit on the support wall plate (1) for collecting tension data.

2. The gravure printing machine head feeding tension control mechanism according to claim 1, characterized in that, A roller (3) is provided on the support wall plate (1), and a detection unit for collecting tension data of the roller (3) is provided on the support wall plate (1).

3. The gravure printing machine head feeding tension control mechanism according to claim 1, characterized in that, The plug component includes a plug shaft (19) disposed on the feeding plate (4), and one end of the plug shaft (19) is provided with a plug (22) that abuts against the feeding roller.

4. The gravure printing machine head feeding tension control mechanism according to claim 3, characterized in that, The magnetic powder brake (7) also includes a rotatable magnetic powder shaft (9), the front end of which extends into the interior of the feeding plate (4), the plug shaft (19) passes through the feeding plate (4), and the front end of the plug shaft (19) is located outside the feeding plate (4).

5. The gravure printing machine head feeding tension control mechanism according to claim 4, characterized in that, The driving mechanism includes a servo motor (13) mounted on the feeding plate (4). The output shaft of the servo motor (13) extends through the inside of the feeding plate (4). A second transmission wheel (12) is mounted on the output shaft of the servo motor (13). A first transmission wheel (10) is mounted on the magnetic powder shaft (9). The second transmission wheel (12) and the first transmission wheel (10) are connected by a first transmission belt (11).

6. The gravure printing machine head feeding tension control mechanism according to claim 5, characterized in that, The magnetic powder brake (7) is connected to the plug through a transmission mechanism. The transmission mechanism includes a third transmission wheel (14) on the magnetic powder shaft (9) and a fourth transmission wheel (16) on the plug shaft (19). The third transmission wheel (14) and the fourth transmission wheel (16) are connected by a second transmission belt (15).

7. The gravure printing machine head feeding tension control mechanism according to claim 4, characterized in that, The rear end of the magnetic powder shaft (9) passes through the magnetic powder brake (7), and a sensing point (6) is provided on the rear end of the surface of the magnetic powder shaft (9). A sensor (5) is provided on the magnetic powder brake (7) for sensing in conjunction with the sensing point (6). The sensor (5) is mounted on the magnetic powder brake (7) by a mounting bracket and corresponds to the sensing point (6).

8. The gravure printing machine head feeding tension control mechanism according to claim 4, characterized in that, The front side of the feeding plate (4) is provided with a first bearing seat (17), and the first bearing seat (17) is provided with a bearing (18) connected to the front end of the plug shaft (19). The rear side of the feeding plate (4) is provided with a second bearing seat (20), and the second bearing seat (20) is provided with a planar bearing (21) and a bearing (18) for receiving lateral force. The rear end of the surface of the plug shaft (19) is connected to the planar bearing (21) and the bearing (18).

9. The gravure printing machine head feeding tension control mechanism according to claim 6, characterized in that, The surface of the plug shaft (19) is provided with a first flat key (8a) for positioning with the plug shaft (19), the surface of the plug shaft (19) is provided with a second flat key (8b) for positioning with the fourth transmission wheel (16), and the surface of the magnetic powder shaft (9) is provided with three third flat keys (8c) for positioning with the third transmission wheel (14), the first transmission wheel (10), and the magnetic powder brake (7), respectively.

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