Flexible plate printing tension automatic control mechanism

Abstract

The utility model relates to a flexible plate printing tension automatic control mechanism. The device structurally comprises a machining installation shell, a discharging base, an extrusion disc, a guide assembly and a tension control assembly. A feeding seat is rotatably mounted on the machining mounting shell, an extrusion disc is slidably connected to the feeding seat in a penetrating mode, guide assemblies used for guiding are symmetrically mounted on one side of the feeding seat, and an infrared tension detector connected with the surface of the machining mounting shell is arranged between the feeding seat and the guide assemblies. Printing raw materials are placed on the discharging base, the extrusion disc presses the printing raw materials, the printing raw materials are in an unwinding state, the guide assembly guides the printing raw materials, the infrared tension detector monitors tension changes in real time, when the side face diameter of the printing raw materials is gradually reduced, tension is lost, the tension control assembly extrudes the printing raw materials downwards, and the printing raw materials are wound. And in the unwinding process of the printing raw materials, tension is in a balanced state.

Description

Technical Field

[0001] This utility model relates to the field of flexographic printing technology, and in particular to an automatic tension control mechanism for flexographic printing. Background Technology

[0002] Flexographic printing is a letterpress printing technology that uses a flexible resin plate as the core printing plate. It directly transfers ink to the substrate through the raised image areas on the plate surface. It has three major advantages: high-efficiency production, environmental friendliness, and adaptability to multiple scenarios. It has become the mainstream solution for modern packaging and flexible material printing. Its printing plate uses photosensitive resin material, which is both elastic and wear-resistant, and can flexibly fit curved substrates. Water-based, UV and other environmentally friendly ink systems greatly reduce VOC emissions and meet food-grade safety standards. This technology is widely used in food packaging, wine bottle labels and flexible materials.

[0003] In the continuous production process of flexographic printing presses, the substrate enters the unwinding stage starting from the take-up shaft. Its side diameter continuously shrinks as the material is released, causing the unwinding tension to exhibit non-linear dynamic changes. When the roll diameter shrinks from the initial diameter to a partially rolled state, without an active adjustment mechanism, the tension fluctuation can reach more than 300% of the initial value, leading to two core problems: material misalignment: sudden tension changes cause the substrate to shift laterally, resulting in a registration accuracy error exceeding ±0.15mm, causing ghosting at the edges of the pattern and a decrease in barcode recognition rate; tensile fracture: the instantaneous tension peak exceeds the tensile strength of the material, causing longitudinal tearing. Traditional flexographic printing presses cannot compensate for tension attenuation in real time according to changes in roll diameter, reducing the functionality of the flexographic printing press.

[0004] Therefore, in response to the above problems, a new automatic tension control mechanism for flexographic printing is proposed. Utility Model Content

[0005] To overcome the problems existing in related technologies, this utility model provides an automatic tension control mechanism for flexographic printing, which can use a tension detector in conjunction with a floating rod structure that moves up and down. When the side diameter of the printing material decreases, the floating rod structure moves downward to compensate for the tension loss.

[0006] To achieve the above objectives, the first aspect of this utility model provides an automatic tension control mechanism for flexographic printing, comprising:

[0007] Machining and mounting housing, feeding seat, extrusion disc, guide assembly and tension control assembly;

[0008] A feeding seat is rotatably mounted on the processing and mounting housing. An extrusion disc slides through the feeding seat. A guide assembly for guiding is symmetrically mounted on one side of the feeding seat. An infrared tension detector connected to the surface of the processing and mounting housing is provided between the feeding seat and the guide assembly. A tension control assembly for adjusting tension is provided between the two guide assemblies.

[0009] Furthermore, a first protective shell is fixedly connected to the back of the machining and mounting housing, a first motor is installed inside the first protective shell, a spur gear is fixedly connected to the output shaft of the first motor, a spur gear is fixedly connected to one side of the machining and mounting housing, and the spur gear on the output shaft of the first motor meshes with the spur gear on the machining and mounting housing.

[0010] Furthermore, the guide assembly includes a strip groove, a guide seat, a guide rod, and a guide slider;

[0011] The material feeding seat has symmetrically installed strip grooves on one side of the processing and mounting shell surface. Guide seats are symmetrically slidably installed inside the strip grooves. Guide rods are rotatably connected to the guide seats. Guide sliders that are symmetrically slidably connected to the strip grooves are installed on the guide seats.

[0012] Furthermore, a synchronous moving block is fixedly connected to one side surface of the strip groove, and a bidirectional lead screw is symmetrically rotatably connected to the back of the machining and mounting housing. The bidirectional lead screw is engaged with the synchronous moving block.

[0013] Furthermore, a second protective shell is installed on one side of the bidirectional lead screw and is fixedly connected to the back of the machining and mounting housing. A second motor is installed inside the second protective shell. A transmission rod is provided above the bidirectional lead screw and is rotatably connected to the back of the machining and mounting housing. The surface of the transmission rod is meshed with the top of the bidirectional lead screw through a bevel gear. One end of the transmission rod is fixedly connected to the output shaft of the second motor.

[0014] Furthermore, the tension control assembly includes a compression seat, a floating rod body, a movable baffle, and an electric push rod;

[0015] Between the two guide components is an extrusion seat that is slidably connected to the processing and mounting shell. A floating rod body is symmetrically fixedly connected to one side surface of the extrusion seat. A movable baffle is slidably connected to the floating rod body. An electric push rod is symmetrically fixedly installed on the extrusion seat. The moving end of the electric push rod is fixedly connected to the movable baffle.

[0016] Furthermore, the other side of the extrusion seat is provided with a lifting groove formed on the surface of the processing and mounting shell. A limit rod is fixedly connected to the inner wall of the lifting groove. A lifting block is fixedly connected to the other side surface of the extrusion seat. The lifting block slides through the limit rod. A third protective shell is provided below the lifting groove and is fixedly connected to the back of the processing and mounting shell. A third motor is installed inside the third protective shell. The output shaft of the third motor is fixedly connected to a threaded rod that is rotatably connected to the back of the processing and mounting shell. The threaded rod meshes with the lifting block.

[0017] The technical solution provided by this utility model can include the following beneficial effects:

[0018] In this example, by installing a guide assembly and a tension control assembly, the printing material is placed on the unwinding seat, the extrusion disc presses the printing material tightly, the printing material is in the unwinding state, the guide assembly guides the printing material, and the infrared tension detector monitors the tension change in real time. When the side diameter of the printing material gradually decreases, the tension is lost, and the tension control assembly squeezes the printing material downward to ensure that the tension is in a balanced state during the unwinding process.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0021] Figure 1 This is a schematic diagram of the overall structure from one angle shown in one embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure from another angle, as shown in an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram of the processing and mounting shell shown in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the guide component structure shown in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the tension control component structure shown in an embodiment of the present invention.

[0026] The correspondence between the labels and component names in the attached figures is as follows:

[0027] 1. Machining and mounting shell; 2. Feeding seat; 3. Extrusion disc;

[0028] 4. Guide assembly; 41. Slot; 42. Guide seat; 43. Guide rod; 44. Guide slider;

[0029] 5. Tension control assembly; 51. Compression seat; 52. Floating rod body; 53. Movable baffle; 54. Electric push rod;

[0030] 6. First protective shell; 7. First motor; 8. Synchronous moving block; 9. Bidirectional lead screw; 10. Second protective shell; 11. Second motor; 12. Transmission rod;

[0031] 13. Lifting groove; 14. Limiting rod; 15. Lifting block; 16. Third protective shell; 17. Third motor; 18. Threaded rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Designing a flexographic printing press with tension control is currently the primary technical problem that engineers need to solve.

[0036] To address the aforementioned problems, this utility model provides an automatic tension control mechanism for flexographic printing. This structure utilizes a tension detector in conjunction with a floating rod structure that moves up and down. When the diameter of the printing material's side surface decreases, the floating rod structure moves downward to compensate for tension loss.

[0037] The technical solution of the present invention (Embodiment 1) is described in detail below with reference to the accompanying drawings.

[0038] Figure 1 This is a schematic diagram of the overall structure from one angle shown in one embodiment of this utility model; Figure 2 This is a schematic diagram of the overall structure from another angle, as shown in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the processing and mounting shell shown in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the guide component structure shown in an embodiment of the present invention; Figure 5 This is a schematic diagram of the tension control component structure shown in an embodiment of the present invention.

[0039] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The automatic tension control mechanism for flexographic printing specifically includes:

[0040] The machining and installation components include: 1. housing, 2. feeding seat, 3. extrusion disc, 4. guide assembly, and 5. tension control assembly;

[0041] A feeding seat 2 is rotatably mounted on the processing and mounting shell 1. An extrusion disc 3 is slidably connected to the feeding seat 2. A guide component 4 for guiding is symmetrically mounted on one side of the feeding seat 2. An infrared tension detector connected to the surface of the processing and mounting shell 1 is provided between the feeding seat 2 and the guide component 4. A tension control component 5 for adjusting tension is provided between the two guide components 4.

[0042] Specifically, a first protective shell 6 is fixedly connected to the back of the processing and mounting shell 1, a first motor 7 is installed inside the first protective shell 6, a spur gear is fixedly connected to the output shaft of the first motor 7, a spur gear is fixedly connected to one side of the processing and mounting shell 1, and the spur gear on the output shaft of the first motor 7 meshes with the spur gear of the processing and mounting shell 1.

[0043] Specifically, the guide assembly 4 includes a strip groove 41, a guide seat 42, a guide rod 43, and a guide slider 44;

[0044] The material feeding seat 2 has a strip groove 41 symmetrically installed on one side of the surface of the processing and mounting shell 1. A guide seat 42 is symmetrically slidably installed inside the strip groove 41. A guide rod 43 is rotatably connected to the guide seat 42. A guide slider 44 symmetrically installed on the guide seat 42 and slidably connected to the strip groove 41.

[0045] Specifically, a synchronous moving block 8 is fixedly connected to one side surface of the strip groove 41, and a bidirectional lead screw 9 is symmetrically rotatably connected to the back of the processing and mounting shell 1. The bidirectional lead screw 9 is engaged with the synchronous moving block 8.

[0046] Specifically, a second protective shell 10 is installed on one side of the bidirectional lead screw 9 and is fixedly connected to the back of the processing and mounting shell 1. A second motor 11 is installed inside the second protective shell 10. A transmission rod 12 is provided above the bidirectional lead screw 9 and is rotatably connected to the back of the processing and mounting shell 1. The surface of the transmission rod 12 is connected to the top of the bidirectional lead screw 9 through bevel gear meshing. One end of the transmission rod 12 is fixedly connected to the output shaft of the second motor 11.

[0047] Specifically, the tension control assembly 5 includes a compression seat 51, a floating rod body 52, a movable baffle 53, and an electric push rod 54;

[0048] Between the two guide components 4, there is an extrusion seat 51 that is slidably connected to the processing and mounting shell 1. A floating rod body 52 is symmetrically fixedly connected to one side surface of the extrusion seat 51. A movable baffle 53 is slidably connected to the floating rod body 52. ​​An electric push rod 54 is symmetrically fixedly installed on the extrusion seat 51. The moving end of the electric push rod 54 is fixedly connected to the movable baffle 53.

[0049] Specifically, the other side of the extrusion seat 51 is provided with a lifting groove 13 formed on the surface of the processing and mounting shell 1. A limit rod 14 is fixedly connected to the inner wall of the lifting groove 13. A lifting block 15 is fixedly connected to the other side surface of the extrusion seat 51. The lifting block 15 slides through the limit rod 14. A third protective shell 16 is provided below the lifting groove 13 and is fixedly connected to the back of the processing and mounting shell 1. A third motor 17 is installed inside the third protective shell 16. The output shaft of the third motor 17 is fixedly connected to a threaded rod 18 that is rotatably connected to the back of the processing and mounting shell 1. The threaded rod 18 is engaged with the lifting block 15.

[0050] In this embodiment, how to ensure tension balance, combined with Figure 1 and Figure 3 The specific implementation method is as follows: the printing material is placed on the feeding seat 2, the extrusion disc 3 presses the printing material tightly, the first motor 7 inside the first protective shell 6 is started, the output shaft of the first motor 7 contacts the flat gear on one side of the processing and mounting shell 1, the processing and mounting shell 1 rotates to release the printing material, the guide component 4 guides the printing material, the infrared tension detector monitors the tension change in real time, when the side diameter of the printing material gradually decreases, the tension is lost, the tension control component 5 squeezes the printing material downward to ensure that the tension is in a balanced state during the unwinding process of the printing material.

[0051] For example: how to guide printing materials of different thicknesses, combined with... Figure 4 The specific implementation method is as follows: the second motor 11 inside the second protective shell 10 is started. The output shaft of the second motor 11 drives the transmission rod 12 to rotate. The bevel gear on the surface of the transmission rod 12 contacts the bevel gear at the top of the bidirectional lead screw 9, which drives the two bidirectional lead screws 9 to rotate in the same direction. The bidirectional lead screws 9 control the synchronous moving block 8 to move closer or further away at the same time. The synchronous moving block 8 drives the two guide seats 42 to move closer or further away from each other along the inside of the strip groove 41. The printing material rotates and is guided on the surface of the guide rod 43, which is convenient to adapt to printing materials of different thicknesses. When the guide seats 42 move closer or further away from each other, the guide slider 44 slides along the inner wall of the strip groove 41.

[0052] In this embodiment, how to squeeze printing materials of different lengths from top to bottom, combined with... Figure 5 The specific implementation method is as follows: the printing material passes through the middle of the two floating rod bodies 52, the side diameter of the printing material decreases, the third motor 17 inside the third protective shell 16 is activated, the third motor 17 drives the lifting block 15 to move downward along the inside of the limiting rod 14, the lifting block 15 drives the extrusion seat 51 and the floating rod body 52 to move downward, and extrudes the printing material downward. When the length of the printing material changes, the moving end of the electric push rod 54 drives the movable baffle 53 to slide along the surface of the floating rod body 52. ​​The movable baffle 53 fits the side of the printing material, which is convenient to adapt to printing materials of different lengths.

[0053] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0054] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A mechanism for automatic tension control in flexographic printing, characterized in that Include: Processing installation shell (1), material discharge seat (2), extrusion disc (3), guide assembly (4) and tension control assembly (5); The processing installation shell (1) is rotatably connected with the material discharge seat (2), the material discharge seat (2) is slidably connected with the extrusion disc (3), the material discharge seat (2) is symmetrically connected with the guide assembly (4) on one side, the material discharge seat (2) and the guide assembly (4) are connected with the infrared tension detector on the surface of the processing installation shell (1), and the guide assembly (4) is connected with the tension control assembly (5) in the middle.

2. The automatic tension control mechanism for flexographic printing according to claim 1, wherein: The back of the processing installation shell (1) is fixedly connected with a first protective shell (6), the first protective shell (6) is internally provided with a first motor (7), the output shaft of the first motor (7) is fixedly connected with a flat gear, one side of the processing installation shell (1) is fixedly connected with a flat gear, and the flat gear of the output shaft of the first motor (7) is meshingly connected with the flat gear of the processing installation shell (1).

3. The automatic tension control mechanism for flexographic printing according to claim 1, wherein: The guide assembly (4) comprises a strip-shaped slot (41), a guide seat (42), a guide rod (43) and a guide sliding block (44). One side of the material discharge seat (2) is symmetrically provided with a strip-shaped slot (41) formed on the surface of the processing installation shell (1), the strip-shaped slot (41) is internally and symmetrically provided with a guide seat (42) slidably connected, the guide seat (42) is rotatably connected with a guide rod (43), and the guide seat (42) is symmetrically provided with a guide sliding block (44) slidably connected with the strip-shaped slot (41).

4. The automatic tension control mechanism for flexographic printing according to claim 3, wherein: One side surface of the strip-shaped slot (41) is fixedly connected with a synchronous moving block (8), the back of the processing installation shell (1) is rotatably connected with a bidirectional screw rod (9), and the bidirectional screw rod (9) is meshingly connected with the synchronous moving block (8).

5. The automatic tension control mechanism for flexographic printing according to claim 4, wherein: One side of the bidirectional screw rod (9) is provided with a second protective shell (10) fixedly connected with the back of the processing installation shell (1), the second protective shell (10) is internally provided with a second motor (11), the top of the bidirectional screw rod (9) is rotatably connected with a transmission rod (12) connected with the back of the processing installation shell (1), the surface of the transmission rod (12) is meshingly connected with the top end of the bidirectional screw rod (9) through a bevel gear, and one end of the transmission rod (12) is fixedly connected with the output shaft of the second motor (11).

6. The automatic tension control mechanism for flexographic printing according to claim 1, wherein: The tension control assembly (5) comprises an extrusion seat (51), a floating rod main body (52), a movable baffle (53) and an electric push rod (54). Two said guide assembly (4) is equipped with extrusion seat (51) and processing installation shell (1) sliding connection, one side surface of said extrusion seat (51) is fixedly connected with floating rod body (52), the floating rod body (52) is slidably connected with movable baffle (53), the extrusion seat (51) is fixedly connected with electric push rod (54), and the movable end of the electric push rod (54) is fixedly connected with the movable baffle (53).

7. The automatic tension control mechanism of the flexographic printing according to claim 6, wherein: The other side of the extrusion seat (51) is provided with a lifting groove (13) opened on the surface of the processing installation shell (1), the inner wall of the lifting groove (13) is fixedly connected with a limiting rod (14), the other side surface of the extrusion seat (51) is fixedly connected with a lifting block (15), the lifting block (15) is slidably connected with the limiting rod (14), and the lifting groove (13) is provided below with a third protective shell (16) fixedly connected with the back of the processing installation shell (1), a third motor (17) is installed in the third protective shell (16), a threaded rod (18) is fixedly connected with the output shaft of the third motor (17) and rotationally connected with the back of the processing installation shell (1), and the threaded rod (18) is engagedly connected with the lifting block (15).

Images