Automatic ink stirring mechanism of offset press

Abstract

The invention discloses an automatic ink stirring mechanism of an offset press, relates to the technical field of offset presses, and solves the problems of solvent volatilization, surface skinning and pigment filler precipitation caused by long-time standing of ink of the offset press in an ink fountain. An automatic ink stirring mechanism of an offset press comprises an offset press main body and an ink storage box, the ink storage box is fixedly arranged at the upper end of the offset press main body, a blanket cylinder is rotationally arranged in the offset press main body, an impression cylinder is rotationally arranged below the blanket cylinder, an ink box is fixedly arranged at the upper end of the blanket cylinder, and the ink box is fixedly connected with the impression cylinder. The interior of the ink storage box is in driving connection with a shaft rod through a driving mechanism, and the outer surface of the shaft rod is fixedly connected with a plurality of stirring blades. The shaft rod is driven by the driving mechanism to move up and down and rotate, and then the stirring blades and the scraper on the outer surface are driven to rotate, so that ink in the ink storage box can be fully and uniformly stirred, and the phenomenon of uneven coloring caused by precipitation of pigment filler in the ink storage box is avoided.

Description

Technical Field

[0001] This invention relates to the field of offset printing machine technology, specifically to an automatic ink stirring mechanism for an offset printing machine. Background Technology

[0002] Offset printing presses are a type of planographic printing press. During printing, the image is first transferred from the printing plate to a rubber roller, and then transferred from the rubber roller to the paper. Printing presses can be classified according to their paper feeding method into sheet-fed offset presses and web offset presses; according to the number of colors printed in one pass, they can be classified into single-color, two-color, four-color, and multi-color presses; and according to the maximum paper size they can handle, they can be classified into small offset presses, six-open, four-open, half-open, and full-sheet presses. In addition, there are double-sided printing presses that can print on both sides simultaneously in one pass. Sheet-fed offset presses are planographic printing presses used for printing high-end commercial printed materials and packaging, and are the mainstream of modern paper printing.

[0003] In existing offset printing presses, prolonged stagnation of ink in the ink tank leads to solvent evaporation, surface skinning, and pigment / filler sedimentation. This not only wastes ink but also severely affects the stability of print quality, resulting in defects such as color difference, ghosting, and ink smearing. Therefore, this solution does not meet current requirements. To address this issue, we propose an automatic ink stirring mechanism for offset printing presses. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic ink stirring mechanism for offset printing machines, addressing the problems mentioned in the background section regarding the evaporation of solvents, surface skinning, and pigment / filler sedimentation caused by prolonged stagnation of ink in the ink tank in existing offset printing machines. This not only wastes ink but also severely affects the stability of printing quality, leading to defects such as color difference, ghosting, and ink smearing in the printed products.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic ink stirring mechanism for an offset printing machine, comprising an offset printing machine body and an ink storage tank, the ink storage tank being fixedly disposed at the upper end of the offset printing machine body, a rubber roller being rotatably disposed inside the offset printing machine body, an impression cylinder being rotatably disposed below the rubber roller, an ink cartridge being fixedly disposed at the upper end of the rubber roller, a plurality of through holes being opened at the bottom end of the ink cartridge, a sponge block being installed below the through holes and at the bottom end of the ink cartridge, and the bottom end of the sponge block being in contact with the outer surface of the rubber roller, an ink inlet pipe being connected through the middle of the upper end of the ink cartridge, and an ink outlet pipe extending through the ink inlet pipe being fixedly connected at the bottom end of the ink storage tank;

[0006] The ink storage box is driven by a drive mechanism to connect a shaft inside. Several stirring blades are fixedly connected to the outer surface of the shaft. Scrapers are connected to both sides of the shaft near the middle through fixed rods, and one side of the scraper makes rolling contact with the inner wall of the ink storage box. A vision sensor is installed on one side of the top of the ink storage box.

[0007] Preferably, the driving mechanism includes a support base, a motor, a fixed cylinder, and a sleeve. The support base is fixedly disposed at the middle of the top of the ink storage box, and the motor is fixedly disposed at the top of the support base.

[0008] Preferably, the fixing cylinder is fixedly installed at the bottom end of the support base, and the fixing cylinder passes through the top end of the ink storage box and extends into the interior of the ink storage box. The output end of the motor passes through the support base and extends into the interior of the fixing cylinder, and is fixedly connected to the sleeve.

[0009] Preferably, the bottom end of the sleeve is movably connected to a shaft, the upper end of the shaft extends through into the interior of the sleeve, and is fixedly connected to a limiting plate that is slidably connected inside the sleeve.

[0010] Preferably, a downward-sloping arc groove is provided below the sleeve and on the inner wall of the fixed cylinder. A slider is fixedly connected to the side of the shaft near the upper end, and one end of the slider is slidably connected to the inside of the arc groove.

[0011] Preferably, symmetrical movable cavities are provided on both sides near the bottom of the ink inlet tube. Slide plates are slidably connected inside the movable cavities on both sides. Connecting rods that penetrate the movable cavities and extend into the ink cartridge are fixedly connected to the bottom ends of the two slide plates. A blocking plate is fixedly connected between the bottom ends of the two connecting rods.

[0012] Preferably, a spring is fixedly connected between the bottom end of the slide plate and the bottom end inside the movable cavity, and the spring is wound around the outer surface of the connecting rod. The diameter of the blocking plate is larger than the diameter of the ink inlet tube, and in the natural state of the spring, the blocking plate is in sealed contact with the bottom end of the ink tube through the sealing gasket.

[0013] Preferably, a protrusion is fixedly connected to the upper end of the blocking plate, and a ball bearing is rotatably provided at the top of the protrusion, while the bottom end of the shaft moves to contact the ball bearing.

[0014] Preferably, a controller is provided on one side of the offset printing machine body, and the vision sensor is electrically connected to the controller.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention uses a starting motor to drive the sleeve and shaft to rotate inside the fixed cylinder. Then, through the rotation of the shaft, the shaft moves up and down and rotates under the sliding limit of the slider on one side and the downward-sloping arc groove. At the same time as the shaft moves up and down and rotates, it drives the stirring blade and scraper on the outer surface to rotate. Through the rotation of the stirring blade, the ink inside the ink storage box can be fully stirred and evenly mixed, and the pigment filler that has settled at the bottom of the ink storage box can be fully stirred to avoid uneven coloring.

[0017] 2. This invention utilizes the up-and-down movement of a shaft. When the bottom end of the shaft moves down to contact the ball bearing at the top of the protrusion, it pushes the blocking plate with the protrusion away from the ink inlet pipe. This causes the connecting rods at both ends of the blocking plate to slide down along the movable cavity and compress the spring. At this time, the ink, after being stirred inside the ink storage tank, enters the ink inlet pipe through the ink outlet pipe and then enters the ink cartridge from the ink inlet pipe. When the bottom end of the shaft moves away from the protrusion, the blocking plate, under the elastic force of the spring, seals the bottom end of the ink inlet pipe, blocking the ink from being discharged. Through the intermittent up-and-down reciprocating movement of the blocking plate, the intermittent quantitative discharge of ink can be controlled. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a front sectional view of the entire invention;

[0020] Figure 3 This is a front sectional view of the ink reservoir of the present invention;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A;

[0022] Figure 5 This is a front sectional view of the ink cartridge of the present invention;

[0023] Figure 6 For the present invention Figure 2 A schematic diagram of the structure at point B.

[0024] In the diagram: 1. Offset printing machine body; 2. Ink tank; 3. Controller; 4. Rubber roller; 5. Impression roller; 6. Drive mechanism; 601. Support base; 602. Motor; 603. Fixed cylinder; 60301. Arc groove; 604. Sleeve; 605. Limiting plate; 606. Slider; 7. Shaft; 8. Stirring blade; 9. Scraper; 10. Ink outlet pipe; 11. Vision sensor; 12. Ink cartridge; 1201. Through hole; 13. Ink inlet pipe; 1301. Movable cavity; 14. Slide plate; 15. Connecting rod; 16. Spring; 17. Blocking plate; 18. Protrusion; 19. Ball bearing; 20. Sponge block. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Please see Figures 1 to 6An embodiment of the present invention provides an automatic ink stirring mechanism for an offset printing machine, comprising an offset printing machine body 1 and an ink storage box 2. The ink storage box 2 is fixedly disposed at the upper end of the offset printing machine body 1. A rubber roller 4 is rotatably disposed inside the offset printing machine body 1. An impression roller 5 is rotatably disposed below the rubber roller 4. An ink cartridge 12 is fixedly disposed at the upper end of the rubber roller 4. A plurality of through holes 1201 are opened at the bottom end of the ink cartridge 12. A sponge block 20 is installed below the through holes 1201 and at the bottom end of the ink cartridge 12. The bottom end of the sponge block 20 contacts the outer surface of the rubber roller 4. An ink inlet pipe 13 is connected through the middle of the upper end of the ink cartridge 12. An ink outlet pipe 10 is fixedly connected to the bottom end of the ink storage box 2, extending through the ink inlet pipe 13.

[0027] Inside the ink storage box 2, a shaft 7 is driven and connected by a drive mechanism 6. Several stirring blades 8 are fixedly connected to the outer surface of the shaft 7. Scrapers 9 are connected to both sides of the shaft 7 near the middle by fixed rods. One side of the scraper 9 rolls in contact with the inner wall of the ink storage box 2. A vision sensor 11 is installed on one side of the top inside the ink storage box 2.

[0028] A controller 3 is provided on one side of the offset printing machine body 1, and a vision sensor 11 is electrically connected to the controller 3. The vision sensor 11 observes whether there is a skin formation on the surface of the ink inside the ink storage box 2. If there is a skin formation, the controller 3 automatically starts the drive mechanism 6 to drive the shaft 7 to work.

[0029] The drive mechanism 6 includes a support base 601, a motor 602, a fixing cylinder 603, and a sleeve 604. The support base 601 is fixedly disposed at the middle of the top of the ink storage box 2. The motor 602 is fixedly disposed at the top of the support base 601. The fixing cylinder 603 is fixedly installed at the bottom of the support base 601, and the fixing cylinder 603 passes through the top of the ink storage box 2 and extends into the interior of the ink storage box 2. The output end of the motor 602 passes through the support base 601 and extends into the interior of the fixing cylinder 603, and is connected to the sleeve 604. The sleeve 604 is fixedly connected, and the bottom end of the sleeve 604 is movably connected to the shaft 7. The upper end of the shaft 7 extends through into the inside of the sleeve 604 and is fixedly connected to the limiting plate 605 which is slidably connected inside the sleeve 604. Below the sleeve 604, and on the inner wall of the fixed sleeve 603, there is a downwardly sloping arc groove 60301. The side of the shaft 7 near the upper end is fixedly connected to the slider 606, and one end of the slider 606 is slidably connected to the inside of the arc groove 60301.

[0030] The motor 602 drives the sleeve 604 and the shaft 7 to rotate inside the fixed cylinder 603. Then, the rotation of the shaft 7 causes it to move up and down and rotate under the sliding limit of the slider 606 on one side and the downward-sloping arc groove 60301. While the shaft 7 moves up and down and rotates, it drives the stirring blade 8 and scraper 9 on the outer surface to rotate. The rotation of the stirring blade 8 can make the ink inside the ink storage box 2 fully stirred and can also fully stir the pigment filler that has settled at the bottom of the ink storage box 2.

[0031] Symmetrical movable cavities 1301 are provided on both sides near the bottom of the ink inlet tube 13. Slide plates 14 are slidably connected inside the movable cavities 1301 on both sides. Connecting rods 15 that penetrate the movable cavities 1301 and extend into the ink cartridge 12 are fixedly connected to the bottom ends of the two slide plates 14. A blocking plate 17 is fixedly connected between the bottom ends of the two connecting rods 15. A spring 16 is fixedly connected between the bottom end of the slide plate 14 and the bottom end inside the movable cavity 1301. The spring 16 is wrapped around the outer surface of the connecting rod 15. The diameter of the blocking plate 17 is larger than the diameter of the ink inlet tube 13. In the natural state of the spring 16, the blocking plate 17 is in sealed contact with the bottom end of the ink tube 13 through a sealing gasket. A protrusion 18 is fixedly connected to the upper end of the blocking plate 17. A ball bearing 19 is rotatably provided at the top of the protrusion 18. The bottom end of the shaft 7 moves and contacts the ball bearing 19.

[0032] When the bottom end of the shaft 7 moves down to contact the ball bearing 19 at the upper end of the protrusion 18, it pushes the blocking plate 17 with the protrusion 18 away from the ink inlet pipe 13. This causes the connecting rods 15 at both ends of the blocking plate 17 to slide down along the movable cavity 1301 and compress the spring 16. At this time, the ink inside the ink storage box 2, after being stirred, enters the ink inlet pipe 13 through the ink outlet pipe 10, and then enters the ink cartridge 12 from the ink inlet pipe 13. When the bottom end of the shaft 7 moves away from the protrusion 18, the blocking plate 17, under the elastic force of the spring 16, blocks the bottom end of the ink inlet pipe 13, preventing ink from being discharged. Through the intermittent up-and-down reciprocating motion of the blocking plate 17, the intermittent quantitative discharge of ink can be controlled.

[0033] When the offset printing machine is in use, the visual sensor 11 observes whether there is a skin-like phenomenon on the surface of the ink inside the ink storage tank 2. When the ink has a skin-like phenomenon, the motor 602 is started to drive the sleeve 604 and the shaft 7 to rotate inside the fixed cylinder 603. Then, through the rotation of the shaft 7, the shaft 7 moves up and down and rotates under the sliding limit of the slider 606 on one side and the downward arc groove 60301. While the shaft 7 moves up and down and rotates, it drives the stirring blade 8 and the scraper 9 on the outer surface to rotate. Through the rotation of the stirring blade 8, the ink inside the ink storage tank 2 can be fully stirred and the pigment filler that has settled at the bottom of the ink storage tank 2 can be fully stirred to avoid uneven coloring.

[0034] As the shaft 7 moves up and down, when the bottom end of the shaft 7 moves down to contact the ball bearing 19 at the upper end of the protrusion 18, it pushes the blocking plate 17 with the protrusion 18 away from the ink inlet pipe 13. This causes the connecting rods 15 at both ends of the blocking plate 17 to slide down along the movable cavity 1301 and compress the spring 16. At this time, the ink inside the ink storage box 2, after being stirred, enters the ink inlet pipe 13 through the ink outlet pipe 10, and then enters the ink cartridge 12 from the ink inlet pipe 13. When the bottom end of the shaft 7 moves away from the protrusion 18, the blocking plate 17, under the elastic force of the spring 16, blocks the bottom end of the ink inlet pipe 13, preventing ink from being discharged. Through the intermittent up and down reciprocating motion of the blocking plate 17, the ink can be discharged intermittently and quantitatively. The ink enters the ink cartridge 12 and can penetrate into the interior of the sponge block 20 through the through hole 1201, thus being evenly attached to the outer surface of the rubber roller 4.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic ink mixing mechanism for an offset printing machine, comprising an offset printing machine body (1) and an ink storage tank (2), wherein the ink storage tank (2) is fixedly disposed at the upper end of the offset printing machine body (1), characterized in that: The offset printing machine body (1) is equipped with a rubber roller (4) inside, and an impression roller (5) is rotated below the rubber roller (4). An ink cartridge (12) is fixedly installed at the upper end of the rubber roller (4). Several through holes (1201) are opened at the bottom end of the ink cartridge (12). A sponge block (20) is installed below the through holes (1201) and at the bottom end of the ink cartridge (12). The bottom end of the sponge block (20) is in contact with the outer surface of the rubber roller (4). An ink inlet pipe (13) is connected through the middle of the upper end of the ink cartridge (12). An ink outlet pipe (10) that extends through the ink inlet pipe (13) is fixedly connected to the bottom end of the ink storage box (2). The ink storage box (2) is connected to a shaft (7) via a drive mechanism (6). Several stirring blades (8) are fixedly connected to the outer surface of the shaft (7). Scrapers (9) are connected to both sides of the shaft (7) near the middle via fixed rods. One side of the scraper (9) is in rolling contact with the inner wall of the ink storage box (2). A vision sensor (11) is installed on one side of the top of the ink storage box (2).

2. The automatic ink stirring mechanism of an offset printing machine according to claim 1, characterized in that: The drive mechanism (6) includes a support base (601), a motor (602), a fixed cylinder (603), and a sleeve (604). The support base (601) is fixedly disposed at the middle of the top of the ink storage box (2), and the motor (602) is fixedly disposed at the top of the support base (601).

3. The automatic ink stirring mechanism of an offset printing machine according to claim 2, characterized in that: The fixed cylinder (603) is fixedly installed at the bottom of the support base (601), and the fixed cylinder (603) penetrates the top of the ink storage box (2) and extends into the interior of the ink storage box (2). The output end of the motor (602) penetrates the support base (601) and extends into the interior of the fixed cylinder (603), and is fixedly connected to the sleeve (604).

4. The automatic ink stirring mechanism of an offset printing machine according to claim 3, characterized in that: The bottom end of the sleeve (604) is movably connected to a shaft (7), the upper end of the shaft (7) extends through into the interior of the sleeve (604), and is fixedly connected to a limiting plate (605) that is slidably connected inside the sleeve (604).

5. The automatic ink stirring mechanism of an offset printing machine according to claim 4, characterized in that: Below the sleeve (604), and on the inner wall of the fixed cylinder (603), there is a downward-sloping arc groove (60301). The shaft (7) is fixedly connected to a slider (606) on the side near the upper end, and one end of the slider (606) is slidably connected to the inside of the arc groove (60301).

6. The automatic ink stirring mechanism of an offset printing machine according to claim 1, characterized in that: The ink inlet tube (13) has symmetrical movable cavities (1301) on both sides near the bottom. Slide plates (14) are slidably connected inside the movable cavities (1301) on both sides. Connecting rods (15) that penetrate the movable cavities (1301) and extend into the ink cartridge (12) are fixedly connected to the bottom ends of the two slide plates (14). A blocking plate (17) is fixedly connected between the bottom ends of the two connecting rods (15).

7. The automatic ink stirring mechanism of an offset printing machine according to claim 6, characterized in that: A spring (16) is fixedly connected between the bottom end of the slide plate (14) and the bottom end inside the active cavity (1301), and the spring (16) is wrapped around the outer surface of the connecting rod (15). The diameter of the blocking plate (17) is larger than the diameter of the ink inlet tube (13), and in the natural state of the spring (16), the blocking plate (17) is in sealed contact with the bottom end of the ink tube (13) through the sealing gasket.

8. The automatic ink stirring mechanism of an offset printing machine according to claim 7, characterized in that: The upper end of the blocking plate (17) is fixedly connected to a protrusion (18), and the top of the protrusion (18) is rotatably provided with a ball (19), and the bottom end of the shaft (7) moves to contact the ball (19).

9. The automatic ink stirring mechanism of an offset printing machine according to claim 1, characterized in that: The offset printing machine body (1) is equipped with a controller (3) on one side, and the vision sensor (11) is electrically connected to the controller (3).

Images