Convex roller structure for single-color letterpress printing machine

Abstract

The utility model discloses a convex roller structure for a single-color letterpress printing machine, which relates to the technical field of printing machine components and comprises a rack, a plurality of threaded mounting holes distributed at equal intervals are arranged at two ends of the rack, a C-shaped movable frame is arranged on the rack, and two ends of the movable frame penetrate through the rack. Two springs which are arranged at an interval are fixedly mounted in the movable frame, and the other ends of the springs are fixedly connected to the rack; a convex roller is arranged in the movable frame, connecting shafts are fixedly installed at the two ends of the convex roller, penetrate through the movable frame and are rotatably installed on the movable frame, spline grooves are formed in the connecting shafts, the connecting shafts are connected with an external driving device, the external driving device is installed on the movable frame, and an integrated frame is fixedly installed in the movable frame. A protruding part is arranged in the integrated frame, a servo motor is fixedly installed on the machine frame, an eccentric wheel is fixedly installed at the output shaft end of the servo motor, and an output shaft of the servo motor is installed at the eccentric position of the eccentric wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of printing press components, in particular to a convex roller structure for a single-color relief printing press. Background Art

[0002] The relief printing press roller is a printing mechanical component used in the relief printing process. Relief printing is a common printing method with a relatively simple principle. In relief printing, the inking device of the printing press first makes the ink evenly distributed, and then transfers the ink to the printing plate through the ink roller. This printing method is suitable for large-scale printing requirements because the relief printing press roller can efficiently apply the ink evenly on paper or other printing substrates, thereby achieving high-quality printing effects.

[0003] For example, the printing plate cylinder with the publication number of CN107206780B discloses a printing plate cylinder that can easily install the printing plate and improve the strength. The printing plate cylinder is installed on the rotation-driven plate drive shaft, and the cylindrical printing plate is installed from the front end side of the printing plate cylinder. The printing plate cylinder includes: a printing plate cylinder body having a plate mounting surface for mounting the printing plate; a flat portion formed with a flat surface located radially inside the plate mounting surface; a plurality of hole portions formed in the flat portion and arranged in an axially separated state; and a plurality of plate fixing members for tightly fixing the printing plate to the plate mounting surface. The plate fixing members are embedded in the hole portions and are arranged to be movable in the radial direction inside and outside the printing plate cylinder.

[0004] The convex roller structure of the existing single-color relief printing press cannot adjust the impression force. When the impression force is insufficient, the ink may not be fully transferred to the printed matter, resulting in blurred imprints, affecting the visual effect and recognition of the product. The instability or insufficiency of the impression force will cause uneven distribution of the ink on the printed matter, resulting in different shades of color and reducing the overall aesthetic appearance of the product. For this reason, we propose a convex roller structure for a single-color relief printing press. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a convex roller structure for a single-color relief printing press, which solves the problems raised in the above background art.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A convex roller structure for a single-color relief printing press includes: a frame, a plurality of equally spaced threaded mounting holes are opened at both ends of the frame, a movable frame is arranged on the frame, the movable frame is a C-shaped frame, both ends of the movable frame penetrate through the frame, two springs are fixedly installed in the movable frame at intervals, and the other ends of the springs are fixedly connected to the frame;

[0007] A convex roller is arranged inside the movable frame. Connecting shafts are fixedly installed at both ends of the convex roller. The connecting shafts penetrate through the movable frame and are rotatably installed on the movable frame. Spline grooves are arranged inside the connecting shafts. The connecting shafts are connected to an external driving device, and the external driving device is installed on the movable frame. An integral frame is fixedly installed inside the movable frame. A protruding part is arranged inside the integral frame. A servo motor is fixedly installed on the frame. An eccentric wheel is fixedly installed at the output shaft end of the servo motor, and the output shaft of the servo motor is installed at the eccentric position of the eccentric wheel.

[0008] As a further technical solution of the present invention, the inside of the convex roller is hollow.

[0009] As a further technical solution of the present invention, the surfaces of the protruding part and the eccentric wheel are both polished.

[0010] As a further technical solution of the present invention, a plurality of uniformly distributed penetration holes are formed in the convex roller. The penetration holes penetrate through the convex roller and communicate with the inner cavity of the convex roller. An annular plate is arranged in the inner cavity of the convex roller. Both ends of the annular plate are fixedly connected to the inner side of the convex roller. The annular plate divides the inner cavity of the convex roller into two independent spaces.

[0011] As a further technical solution of the present invention, the annular plate is an elastic thermosensitive heat-conducting metal plate. A heating wire is fixedly connected inside the convex roller, and the heating wire is spiral.

[0012] The present invention provides a convex roller structure for a monochromatic letterpress printing machine, which has the following beneficial effects compared with the prior art:

[0013] 1. For the convex roller structure for a monochromatic letterpress printing machine designed in this way, the servo motor drives the eccentric wheel to rotate. The eccentric wheel rotates and presses the protruding part, thereby applying a downward pressure to the movable frame, and the pressure applied by the convex roller to the impression cylinder can be increased. By adjusting the impression force, it can be ensured that the ink is fully and evenly transferred to the printed matter, making the imprint clear and full, and improving the visual effect and recognition of the product.

[0014] 2. For the convex roller structure for a monochromatic letterpress printing machine designed in this way, the excess ink on the convex roller can enter the inner cavity of the convex roller through the penetration holes, and the excess ink can be removed from the convex roller, avoiding problems such as ink accumulation, imprint blurring or color unevenness in subsequent printing. By heating the air in the inner cavity of the convex roller with the heating wire, the annular plate deforms due to heat and the cavity outside the annular plate is compressed, so that the ink in the convex roller can be discharged through the penetration holes, thereby reusing the ink in the convex roller. Description of the Drawings

[0015] Figure 1It is a schematic structural diagram of a convex roller structure for a single-color relief printing press;

[0016] Figure 2 It is a schematic working diagram of a convex roller structure for a single-color relief printing press;

[0017] Figure 3 It is a partially enlarged schematic diagram of the structure at the eccentric wheel of a convex roller structure for a single-color relief printing press;

[0018] Figure 4 It is an enlarged schematic diagram of the internal structure of the convex roller of a convex roller structure for a single-color relief printing press.

[0019] In the figure: frame 1, movable frame 2, spring 3, convex roller 4, connecting shaft 5, spline groove 6, integral frame 7, convex portion 8, servo motor 9, eccentric wheel 10, penetration hole 11, annular plate 12, heating wire 13, impression cylinder 14. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution for a convex roller structure for a single-color relief printing press:

[0022] A convex roller structure for a monochromatic letterpress printing machine, comprising: a frame 1, with a plurality of equally spaced threaded mounting holes provided at both ends of the frame 1. A movable frame 2 is arranged on the frame 1. The movable frame 2 is a C-shaped frame, and both ends of the movable frame 2 penetrate through the frame 1. Two springs 3 arranged at intervals are fixedly installed inside the movable frame 2, and the other ends of the springs 3 are fixedly connected to the frame 1; a convex roller 4 is arranged inside the movable frame 2. Connecting shafts 5 are fixedly installed at both ends of the convex roller 4. The connecting shafts 5 penetrate through the movable frame 2 and are rotatably installed on the movable frame 2. Spline grooves 6 are arranged inside the connecting shafts 5. The connecting shafts 5 are connected to an external driving device, and the external driving device is installed on the movable frame 2. An integral frame 7 is fixedly installed inside the movable frame 2. A convex portion 8 is arranged inside the integral frame 7. A servo motor 9 is fixedly installed on the frame 1, and an eccentric wheel 10 is fixedly installed at the output shaft end of the servo motor 9. The output shaft of the servo motor 9 is installed at the eccentric position of the eccentric wheel 10. The inside of the convex roller 4 is hollow. The surfaces of the convex portion 8 and the eccentric wheel 10 are both polished. By driving the eccentric wheel to rotate through the servo motor, the eccentric wheel rotates and presses against the convex portion, and the integral frame is pressed downwards, thereby applying a downward pressure to the movable frame, which can increase the pressure exerted by the convex roller on the impression cylinder. By adjusting the printing pressure, it can be ensured that the ink is fully and evenly transferred to the printed matter, making the imprint clear and full, and improving the visual effect and recognition of the product.

[0023] Among them, as Figure 3 and Figure 4 shown, a plurality of uniformly distributed penetration holes 11 are provided on the convex roller 4. The penetration holes 11 penetrate through the convex roller 4 and are communicated with the internal cavity of the convex roller 4. An annular plate 12 is arranged in the inner cavity of the convex roller 4. Both ends of the annular plate 12 are fixedly connected to the inner side of the convex roller 4. The annular plate 12 divides the internal cavity of the convex roller 4 into two independent spaces. The annular plate 12 is an elastic thermosensitive and heat-conducting metal plate. A heating wire 13 is fixedly connected inside the convex roller 4, and the heating wire 13 is in a spiral shape. The excess ink on the convex roller can enter the inner cavity of the convex roller through the penetration holes, and the excess ink can be removed from the convex roller, avoiding problems such as ink accumulation, blurred imprint or uneven color in subsequent printing.

[0024] The working principle of the present utility model is as follows: By installing the frame 1 on a printing press, the spring 3 is in a compressed state under normal conditions. The elastic force of the spring 3 is applied to the convex roller 4, and a downward pressure is applied to the impression cylinder 14 through the convex roller 4. The external driving device is connected to the connecting shaft 5 and drives the convex roller 4 to rotate through the connecting shaft 5. The eccentric wheel 10 is driven to rotate by the servo motor 9. The eccentric wheel 10 rotates and presses the protruding part 8, and the integrated frame 7 is pressed downward to move, thereby applying a downward pressure to the movable frame 2, which can increase the pressure applied by the convex roller 4 to the impression cylinder 14. By adjusting the impression force, it can be ensured that the ink is fully and evenly transferred to the printed matter, making the imprint clear and full, and improving the visual effect and recognition of the product. An appropriate impression force helps to keep the ink evenly distributed on the printed matter, avoiding the situation of uneven color shades and improving the overall aesthetics of the product.

[0025] The excess ink on the convex roller 4 can enter the inner cavity of the convex roller 4 through the penetration holes 11, and the excess ink can be removed from the convex roller 4, avoiding problems such as ink accumulation, blurred imprint or uneven color in subsequent printing. The air in the inner cavity of the convex roller 4 is heated by the heating wire 13, and the heat is conducted to the annular plate 12. The annular plate 12 is deformed by heat and the cavity outside the annular plate 12 is compressed, so that the ink in the convex roller 4 can be discharged through the penetration holes 11, thereby reusing the ink in the convex roller 4.

[0026] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A convex roller structure for a monochrome relief printing press, characterized in that: include: A frame (1), wherein both ends of the frame (1) are provided with a plurality of threaded mounting holes which are equidistantly distributed, a movable frame (2) is arranged on the frame (1), the movable frame (2) is a C-shaped frame, both ends of the movable frame (2) penetrate the frame (1), two springs (3) which are arranged at intervals are fixedly installed in the movable frame (2), and the other ends of the springs (3) are fixedly connected to the frame (1); A convex roller (4) is arranged in the movable frame (2), and connecting shafts (5) are fixedly installed at both ends of the convex roller (4). The connecting shafts (5) penetrate the movable frame (2) and are rotatably installed on the movable frame (2). A spline groove (6) is arranged in the connecting shafts (5). The connecting shafts (5) are connected to an external drive device, and the external drive device is installed on the movable frame (2). An integrated frame (7) is fixedly installed in the movable frame (2), and a protrusion (8) is arranged in the integrated frame (7). A servo motor (9) is fixedly installed on the frame (1), and an eccentric wheel (10) is fixedly installed on the output shaft end of the servo motor (9). The output shaft of the servo motor (9) is installed at the eccentric position of the eccentric wheel (10).

2. The convex roller structure for a monochrome relief printing press according to claim 1, characterized in that: The convex roller (4) is hollow inside.

3. The convex roller structure for a monochrome relief printing press according to claim 2, characterized in that: The surfaces of the raised portion (8) and the eccentric wheel (10) are polished.

4. The convex roller structure for a monochrome relief printing press according to claim 3, characterized in that: The convex roller (4) is provided with a plurality of evenly distributed penetration holes (11), the penetration holes (11) penetrate the convex roller (4) and are connected to the internal cavity of the convex roller (4), an annular plate (12) is provided in the internal cavity of the convex roller (4), the two ends of the annular plate (12) are fixedly connected to the inner side of the convex roller (4), and the annular plate (12) divides the internal cavity of the convex roller (4) into two independent spaces.

5. The convex roller structure for a monochrome relief printing press according to claim 4, characterized in that: The annular plate (12) is an elastic, heat-sensitive, heat-conductive metal plate. A heating wire (13) is fixedly connected inside the convex roller (4), and the heating wire (13) is spiral-shaped.

Images