Self-adaptive pressure printing machine scraper mechanism

Abstract

The utility model relates to the technical field of printing machine scrapers, and provides a pressure self-adaptive printing machine scraper mechanism. The device comprises a lifting plate connected with a lifting assembly for lifting, a scraper arranged on one surface of the lifting plate and sliding in the height direction of the lifting plate, two swing arm assemblies rotationally connected to the scraper and symmetrically arranged in the height direction of the lifting plate, and an elastic assembly arranged between the two swing arm assemblies. The lower end of the scraper abuts against the printing plate, the swing arm assembly comprises a first swing arm rotationally connected to the scraper and movable parts arranged on the lifting plate so that the end, away from the scraper, of the first swing arm can be hinged to the movable parts, the elastic assembly is arranged between the two movable parts, and the two movable parts move in the direction away from or close to each other. The printing plate has the beneficial effects that the printing plate adapts to the dynamic tension change of the printing stock so as to improve the printing effect of the printing plate on the printing stock.

Description

Technical Field

[0001] The present application relates to the technical field of printing machine scrapers, and in particular to a printing machine scraper mechanism with self-adaptive pressure. Background Art

[0002] Printing press scraper usually refers to the doctor blade system used in flexographic printing presses or gravure printing presses. The main function of the doctor blade is to remove excess ink from the printing plate during the printing process to ensure that only the required pattern or text is transferred to the substrate. The doctor blade is a key component in the printing process, and its performance directly affects the quality and production efficiency of the printed product.

[0003] In the prior art, the printing material is generally arranged between the printing plate and the printing roller. When the printing material moves, the printing roller rotates accordingly, and the scraper is directly driven by a lifting assembly to abut against the printing plate located above the printing material to apply force to the printing plate. While scraping off excess ink, the force can also be transmitted to the printing material through the printing plate, thereby achieving effective transfer to improve the printing effect.

[0004] However, since the tension of the substrate may change during the printing process, the pressure that the substrate can subsequently withstand may also change. If the pressure of the scraper on the printing plate is too great, the substrate may be damaged. If the pressure is too small, the printing effect may be poor. Therefore, further improvement is needed. Utility Model Content

[0005] In order to adapt to the dynamic tension changes of the substrate and improve the printing effect of the printing plate on the substrate, the present application provides a printing press scraper mechanism with self-adaptive pressure.

[0006] The present application provides a printing machine scraper mechanism with adaptive pressure, which adopts the following technical solution:

[0007] A pressure-adaptive scraper mechanism for a printing press comprises a lifting plate connected to a lifting assembly for lifting and lowering, a scraper arranged on one surface of the lifting plate to slide along the height direction of the lifting plate, two swing arm assemblies rotatably connected to the scraper and symmetrically arranged along the height direction of the lifting plate, and an elastic assembly arranged between the two swing arm assemblies, wherein the lower end of the scraper abuts against a printing plate, the swing arm assembly comprises a first swing arm rotatably connected to the scraper, and a movable member arranged on the lifting plate for hingedly connecting one end of the first swing arm away from the scraper, the elastic member is arranged between the two movable members, and the two movable members move in a direction away from or towards each other.

[0008] By adopting the above technical solution, after the lifting component drives the lifting plate to descend, the scraper is abutted against the printing plate, and the acting force is transmitted to the printing substrate below. When the tension of the printing substrate is insufficient at this time, due to the elastic force of the elastic component itself, the two movable parts are pushed to move towards each other, thereby driving the first swing arm to rotate around the hinge point and the rotating connection pad, and further driving the squeegee to tightly abut against the printing plate, so as to perform dynamic tension compensation on the printing substrate and improve the printing effect of the printing plate on the printing substrate.

[0009] When the tension of the printing substrate itself is relatively high, it will be transmitted to the scraper, forcing the first swing arm to rotate, and further driving the two movable parts to move away from each other to lift the scraper, so as to reduce the pressure transmitted to the printing substrate, and thus can adapt to the dynamic tension compensation of the printing substrate itself to further improve the printing effect of the printing plate on the printing substrate.

[0010] Preferably, the first swing arm includes a connecting rod and universal ball head bearings arranged at both ends of the connecting rod and respectively rotatably connected to the movable part and the squeegee.

[0011] By adopting the above technical solution, by providing universal ball head bearings, when receiving the tension feedback from the printing substrate, the first swing arm will have a certain displacement in both the vertical and horizontal directions. Therefore, by providing universal ball head bearings, it can be changed according to the displacement change, thereby providing dynamic tension compensation for the printing substrate.

[0012] Preferably, bolts are coaxially inserted through the universal ball head bearings, and the two bolts arranged on one of the first swing arms are respectively threadedly connected to the movable part and the squeegee.

[0013] By adopting the above technical solution, for the installation of the universal ball head bearing and the fixed seat, through the bolts, the universal ball head bearing can be installed on the movable part and the squeegee, and it is also convenient to disassemble and inspect the first swing arm and the movable part.

[0014] Preferably, the swing arm assembly further includes a second swing arm rotatably connected to the lifting plate. The ends of the second swing arm and the first swing arm close to each other are hinged to the movable part. A first through groove is formed in the lifting plate along the thickness direction thereof corresponding to the position of the movable part. The movable part includes a movable plate abutted against the first swing arm. The bolt is inserted through the movable plate and the first through groove. The size of the first through groove is larger than the size of the bolt.

[0015] By adopting the above technical solution, by providing a second swing arm, it can further adapt to the tension feedback from the printed material to drive the first swing arm to have a certain displacement in both the vertical and horizontal directions, that is, to change according to the displacement change, so as to provide dynamic tension compensation for the printed material. The first through groove is provided to limit the movement range of the bolt, and since the size of the first through groove is larger than the size of the bolt, it is also convenient to provide displacement for the movable part in the vertical and horizontal directions.

[0016] Preferably, the elastic component includes a tension spring, and the movable plate is convexly provided with a hanging rod for hanging the tension spring.

[0017] By adopting the above technical solution, through the pulling force of the tension spring itself, a pre-tightening force is provided for the blade to abut against the printing plate at the beginning, and it is also convenient to dynamically change according to the tension feedback of the printed material itself.

[0018] Preferably, the elastic component further includes a tension sensor provided at one end of the tension spring and a telescopic driving member connected to the end of the tension sensor away from the tension spring. The other end of the telescopic driving member away from the tension sensor is connected to the movable member. The tension sensor is electrically connected to a central control platform for processing the data received by the tension sensor under the pulling force of the tension spring, and a controller electrically connected to the central control platform for executing the instructions sent by the central control platform after processing the scanned data. The controller is electrically connected to the telescopic driving member, and the telescopic direction of the telescopic driving member is the same as the telescopic direction of the tension spring.

[0019] By adopting the above technical solution, in cooperation with the tension sensor and the telescopic driving member, wherein the tension sensor is used to feedback the pulling force data of the tension spring. When the pressure between the blade and the printed material is insufficient, the value feedback by the tension sensor is less than the set range. After transmitting the corresponding data to the hollow platform, through calculation, the corresponding instructions are sent to the controller to start the movable end of the telescopic driving member to contract and pull the elastic component, so that the first swing arm and the second swing arm open, driving the blade to move downward to increase the pressure between the blade and the printed material until the elastic force value reaches the set range, thereby reducing the possibility of poor printing effect due to too small pressure. Similarly, when the pressure between the blade and the printed material is too high, the value feedback by the tension sensor will be higher than the set range, which actually makes the movable end of the telescopic driving member extend, the deformation of the elastic component decreases, and the elastic force is reduced to reduce the pressure between the blade and the printed material, thereby reducing the possibility of the printed material being damaged due to excessive pressure.

[0020] Preferably, the lifting plate is provided with a limiting plate. The upper surface of the limiting plate is provided with a second through groove for the blade to slide through. The surface of the limiting plate away from the blade is provided with an avoidance groove, and the avoidance groove extends to the lower surface of the limiting plate to provide a rotation space for the first swing arm.

[0021] By adopting the above technical solution, a limiting plate is provided to limit the displacement of the scraper in the horizontal direction, so as to improve the lifting stability of the scraper in the height direction and reduce the influence of the provided limiting plate on the first swing arm, and a relief groove is correspondingly provided.

[0022] Preferably, the scraper includes a mounting portion mounted on the first swing arm and a scraper portion detachably connected to the mounting portion.

[0023] By adopting the above technical solution, during use, the scraper portion of the scraper may be worn to a certain extent. Therefore, the scraper includes a mounting portion and a scraper portion detachably connected to the mounting portion, so as to facilitate disassembly and replacement and reduce the replacement cost.

[0024] Preferably, the scraper portion protrudes with a limiting strip, the scraper portion abuts against a mounting strip, the mounting strip is provided with a card slot for the limiting strip to be embedded, and the mounting strip is penetrated by bolts, and there are two bolts which are respectively arranged at both ends of the mounting strip.

[0025] By adopting the above technical solution, since the length of the scraper is usually long, when the scraper portion is mounted on the mounting portion by bolts, a large number of bolts are required, and the corresponding installation time will increase. Therefore, by setting the cooperation between the limiting strip and the card slot, the time spent on installing the scraper portion can be reduced.

[0026] Preferably, there is a spacing between the scraper and the second through groove, and balls abutting against the scraper are rotatably connected to the mutually approaching surfaces of the limiting plate and the lifting plate.

[0027] By adopting the above technical solution, by providing balls, since the contact between the balls and the scraper is point-surface contact, while the contact between the limiting plate, the lifting plate and the scraper is surface-surface contact. Therefore, by providing balls, the friction during the lifting of the scraper in the second through groove and the wear problem of the scraper caused by friction by the limiting plate and the lifting plate can be reduced.

[0028] In summary, the utility model has the following beneficial effects:

[0029] When the tension of the printing substrate is insufficient, due to the elastic force of the elastic component itself, it pushes the two movable parts to move towards each other, thereby driving the first swing arm to rotate around the hinge point and the rotating connection pad, and then driving the squeegee to press tightly against the printing plate, so as to perform dynamic tension compensation for the printing substrate and improve the printing effect of the printing plate on the printing substrate. When the tension of the printing substrate itself is relatively high, it will be transmitted to the squeegee, forcing the first swing arm to rotate, and then driving the two movable parts to move away from each other to lift the squeegee, reducing the pressure transmitted to the printing substrate, and then adapting to the dynamic tension compensation of the printing substrate itself to further improve the printing effect of the printing plate on the printing substrate. Brief Description of the Drawings

[0030] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0031] Figure 2 is the front structural schematic diagram of Embodiment 1 of the present application;

[0032] Figure 3 is the structural schematic diagram of the swing arm assembly in Embodiment 1 of the present application;

[0033] Figure 4 is the reverse structural schematic diagram of Embodiment 1 of the present application;

[0034] Figure 5 is the structural schematic diagram of the tension spring and the hanging rod in Embodiment 1 of the present application;

[0035] Figure 6 is the structural schematic diagram of the ball in Embodiment 1 of the present application;

[0036] Figure 7 is the structural schematic diagram of Embodiment 2 of the present application.

[0037] Description of the Reference Numerals: 1, lifting plate; 11, first through groove; 12, limiting plate; 13, second through groove; 14, avoiding groove; 2, squeegee; 21, mounting part; 22, squeegee part; 23, mounting strip; 24, limiting strip; 25, clamping groove; 3, swing arm assembly; 31, first swing arm; 32, second swing arm; 33, movable part; 331, first movable plate; 332, second movable plate; 34, connecting rod; 35, mounting seat; 36, universal ball head bearing; 4, elastic component; 41, tension spring; 42, tension sensor; 43, telescopic driving part; 5, bolt; 6, hanging rod; 7, fixing plate; 8, mounting rod; 81, ball. Detailed Description of the Embodiments

[0038] The following is a further detailed description of the present application in conjunction with the attached Figure 1-7 , to the present application for further detailed description.

[0039] The embodiment of the present application discloses a pressure-adaptive scraper mechanism for a printing press.

[0040] Embodiment 1:

[0041] A printing press scraper mechanism with adaptive pressure, referring to Figure 1 , comprising a lifting plate 1 connected to a lifting assembly (not shown) for lifting, a scraper 2 arranged on one surface of the lifting plate 1 to slide along the height direction of the lifting plate 1, two swing arm assemblies 3 rotatably connected to the scraper 2 and symmetrically arranged along the height direction of the lifting plate 1, and an elastic assembly 4 arranged between the two swing arm assemblies 3. It should be noted that the lifting assembly can be driven by a cylinder or a motor, and since this is a prior art, it will not be described in detail here.

[0042] Reference Figure 1 , Figure 2 In this embodiment, the length direction of the scraper 2 is parallel to the length direction of the lifting plate 1. The scraper 2 specifically includes a mounting portion 21 mounted on the swing arm assembly 3 and a scraper portion 22 detachably connected to the mounting portion 21, wherein the scraper portion 22 abuts against the printing plate. For the disassembly of the scraper portion 22, in this embodiment, the scraper portion 22 abuts against a mounting strip 23, the length direction of the mounting strip 23 is parallel to the length direction of the mounting portion 21, and the mounting strip 23 is penetrated by bolts 5, which are penetrated by the scraper portion 22 and threadedly connected to the mounting portion 21, and a plurality of bolts 5 are arranged at intervals along the length direction of the mounting strip 23.

[0043] The swing arm assembly 3 specifically includes a first swing arm 31 rotatably connected to the upper end of the mounting portion 21, a second swing arm 32 rotatably connected to the lifting plate 1, and a movable member 33 hinged at one end of the lifting plate 1 for the first swing arm 31 and the second swing arm 32 to approach each other. Since two swing arm assemblies 3 are provided, the elastic assembly 4 is specifically provided between the two movable members 33, and the two movable members 33 move in a direction away from or towards each other.

[0044] Reference Figure 3 , Figure 4 , wherein the first swing arm 31 and the second swing arm 32 each include a connecting rod 34, a mounting seat 35 fixedly connected to both ends of the connecting rod 34, and a universal ball bearing 36 rotatably connected to the mounting seat 35, and a bolt 5 is rotatably passed through the universal ball bearing 36. It should be noted that the universal ball bearings 36 at one end of the first swing arm 31 and the second swing arm 32 that are close to each other are abutted, and are passed through a bolt 5 to be threadedly connected to the movable part 33, the bolt 5 on the other universal ball bearing 36 in the first swing arm 31 is threadedly connected to the mounting portion 21, and the bolt 5 on the other universal ball bearing 36 in the second swing arm 32 is threadedly connected to the lifting plate 1.

[0045] Among them, the movable part 33 is specifically a movable plate abutted against the first swing arm 31. The bolt 5 passing through two mutually abutted universal ball bearings 36 is threadedly connected to the movable plate. At this time, to adapt to the movement of the movable part 33, the lifting plate 1 is provided with a first through groove 11 penetrating along its own thickness direction corresponding to the position of the movable part 33. The bolt 5 passes through the first through groove 11, and the size of the first through groove 11 is larger than the size of the bolt 5.

[0046] Refer to Figure 1 、 Figure 5 , among which, the elastic component 4 specifically includes a tension spring 41, a tension sensor 42 arranged at one end of the tension spring 41, and a telescopic driving member 43 connected to the end of the tension sensor 42 away from the tension spring 41. For the convenience of description, in this embodiment, the two movable plates are respectively a first movable plate 331 and a second movable plate 332. Among them, the tension spring 41 is arranged close to the first movable plate 331. Both the first movable plate 331 and the tension sensor 42 are provided with hanging rods 6 for hanging the tension spring 41. In this embodiment, the telescopic direction of the telescopic driving member 43 is the same as the telescopic direction of the tension spring 41. The telescopic driving member 43 is a cylinder, and the piston rod of the cylinder is fixedly connected to the end of the tension sensor 42 away from the tension spring 41. The second movable plate 332 is fixedly connected with a fixing plate 7 for the fixed connection of the cylinder.

[0047] It should be noted that the tension sensor 42 is electrically connected to a central control platform (not shown in the figure) for processing the data received by the tension sensor 42 under the tension of the tension spring 41, and a controller (not shown in the figure) electrically connected to the central control platform for executing the instructions sent by the central control platform after processing the scanned data. The controller is electrically connected to the telescopic driving member 43 to change the height of the squeegee 2 according to the value fed back by the tension sensor, that is, the pressing effect on the printing plate, so as to adapt to the dynamic tension compensation of the substrate itself and further improve the printing effect of the printing plate on the substrate.

[0048] Furthermore, to reduce the horizontal displacement of the squeegee 2 during the lifting process, in this embodiment, the lifting plate 1 is provided with a limiting plate 12. In this embodiment, the length direction of the limiting plate 12 is parallel to the length direction of the lifting plate 1. Bolts 5 are penetrated through both ends of the limiting plate 12, and the bolts 5 are threadedly connected to the lifting plate 1. The upper surface of the limiting plate 12 is provided with a second through groove 13 for the squeegee 2 to slide through. An avoidance groove 14 is opened on the surface of the limiting plate 12 away from the squeegee 2, and the avoidance groove 14 extends to the lower surface of the limiting plate 12 to provide a rotation space for the first swing arm 31.

[0049] Refer to Figure 4 、 Figure 6, and in order to reduce the friction between the squeegee 2 and the limit plate 12 and the lifting plate 1 during the process of passing through the second through groove 13, in this embodiment, mounting rods 8 are threadedly passed through both the limit plate 12 and the lifting plate 1. Three mounting rods 8 are arranged at intervals along the length direction of the limit plate 12, and the middle mounting rod 8 is arranged close to the tension sensor 42. Four mounting rods 8 are arranged at intervals along the length direction of the lifting plate 1, and the two middle mounting rods 8 are arranged close to the squeegee 2 part. A ball 81 is rotatably connected to the surface of the mounting rod 8 close to the squeegee 2, and the ball 81 abuts against the mounting part 21.

[0050] The implementation principle of the squeegee mechanism of a printing press with adaptive pressure in this application embodiment is as follows: After the lifting component drives the lifting plate 1 to descend, the squeegee 2 abuts against the printing plate and transmits the acting force to the underlying printing material. When the tension of the printing material is insufficient at this time, in cooperation with the tension sensor 42 and the telescopic driving member 43, among them, the tension sensor 42 is used to feedback the tension data of the tension spring 41. When the pressure between the squeegee 2 and the printing material is insufficient, the value feedback by the tension sensor is less than the set range. After transmitting the corresponding data to the hollow platform, through calculation, the corresponding instruction is sent to the controller to activate the movable end of the telescopic driving member 43 to contract and pull the elastic component 4, so that a swing arm and the second swing arm 32 open, driving the squeegee 2 to move downward to increase the pressure between the squeegee 2 and the printing material until the elastic force value reaches the set range, thereby reducing the possibility of poor printing effect due to too small pressure. Similarly, when the pressure between the squeegee 2 and the printing material is too high, the value feedback by the tension sensor will be higher than the set range, which actually causes the movable end of the telescopic driving member 43 to extend, the deformation of the elastic component decreases, and the elastic force decreases to reduce the pressure between the squeegee 2 and the printing material, thereby reducing the possibility of the printing material being damaged due to excessive pressure. Thus, dynamic tension compensation is performed on the printing material to improve the printing effect of the printing plate on the printing material.

[0051] Embodiment 2:

[0052] Referring to Figure 7 , the difference from Embodiment 1 is that a limiting strip 24 protrudes from the mounting strip 23 or the squeegee part 22. Correspondingly, a slot 25 for the limiting strip 24 to be embedded is opened on the squeegee part 22 or the mounting strip 23. In this embodiment, the limiting strip 24 is specifically arranged on the squeegee part 22, and the slot 25 is specifically arranged on the mounting strip 23. At this time, the number of bolts 5 can be reduced. Therefore, two bolts 5 are arranged and are respectively arranged at both ends of the mounting strip 23.

[0053] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A printing press scraper mechanism with adaptive pressure, characterized in that: The invention comprises a lifting plate (1) connected to a lifting assembly for lifting, a scraper (2) arranged on one surface of the lifting plate (1) to slide along the height direction of the lifting plate (1), two swing arm assemblies (3) rotatably connected to the scraper (2) and symmetrically arranged along the height direction of the lifting plate (1), and an elastic assembly (4) arranged between the two swing arm assemblies (3), wherein the lower end of the scraper (2) abuts against a printing plate, the swing arm assembly (3) comprises a first swing arm (31) rotatably connected to the scraper (2), and a movable member (33) arranged on the lifting plate (1) and hinged to one end of the first swing arm (31) away from the scraper (2), and the elastic member (4) is arranged between the two movable members (33), and the two movable members (33) move in a direction away from or towards each other.

2. The printing press scraper mechanism with adaptive pressure according to claim 1, characterized in that: The first swing arm (31) comprises a connecting rod (34) and a universal ball bearing (36) arranged at both ends of the connecting rod (34) and rotatably connected to the movable part (33) and the scraper (2) respectively.

3. The printing press scraper mechanism with adaptive pressure according to claim 2, characterized in that: The universal ball bearing (36) is coaxially penetrated by a bolt (5), and two of the bolts (5) arranged on one of the first swing arms (31) are respectively threadedly connected to the movable part (33) and the scraper (2).

4. The printing press scraper mechanism with adaptive pressure according to claim 3, characterized in that: The swing arm assembly (3) further comprises a second swing arm (32) rotatably connected to the lifting plate (1); one end of the second swing arm (32) and the first swing arm (31) close to each other is hinged to the movable member (33); a first through slot (11) is formed through the lifting plate (1) at a position corresponding to the movable member (33) along its thickness direction; the movable member (33) comprises a movable plate abutting against the first swing arm (31); the bolt (5) is passed through the movable plate; the bolt (5) is passed through the first through slot (11); and the size of the first through slot (11) is larger than the size of the bolt (5).

5. The printing press scraper mechanism with adaptive pressure according to claim 4, characterized in that: The elastic component (4) comprises a tension spring (41), and the movable plate is protrudingly provided with a hanging rod (6) for hanging the tension spring (41).

6. The printing press scraper mechanism with adaptive pressure according to claim 5, characterized in that: The elastic component (4) further comprises a tension sensor (42) arranged at one end of the tension spring (41) and a telescopic driving member (43) connected to one end of the tension sensor (42) away from the tension spring (41); the other end of the telescopic driving member (43) away from the tension sensor (42) is connected to the movable member (33); the tension sensor (42) is electrically connected to a central control platform for processing data received by the tension sensor (42) under the tension of the tension spring (41); and a controller electrically connected to the central control platform for executing instructions sent by the central control platform after processing the scanned data; the controller is electrically connected to the telescopic driving member (43); and the telescopic direction of the telescopic driving member (43) is the same as the telescopic direction of the tension spring (41).

7. The printing press scraper mechanism with adaptive pressure according to claim 1, characterized in that: The lifting plate (1) is provided with a limit plate (12), the upper surface of the limit plate (12) is provided with a second through groove (13) for the scraper (2) to slide through, and the surface of the limit plate (12) away from the scraper (2) is provided with an avoidance groove (14), the avoidance groove (14) extends to the lower surface of the limit plate (12), and provides a rotation space for the first swing arm (31).

8. The printing press scraper mechanism with adaptive pressure according to claim 7, characterized in that: The scraper (2) comprises a mounting portion (21) mounted on the first swing arm (31) and a scraper portion (22) detachably connected to the mounting portion (21).

9. The printing press scraper mechanism with adaptive pressure according to claim 8, characterized in that: The scraper portion (22) is provided with a limit strip (24) protruding therefrom, the scraper portion (22) is in contact with a mounting strip (23), the mounting strip (23) is provided with a slot (25) for the limit strip (24) to be engaged, the mounting strip (23) is penetrated by a bolt (5), two bolts (5) are provided and are respectively arranged at two ends of the mounting strip (23).

10. The printing press scraper (2) mechanism with self-adaptive pressure according to claim 7, characterized in that: A spacing is left between the scraper (2) and the second through groove (13), and the surfaces of the limiting plate (12) and the lifting plate (1) close to each other are both rotatably connected with a ball (81) that abuts against the scraper (2).

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