A squeegee printing section of a printing press

Abstract

This utility model discloses a squeegee printing section for a printing press, comprising: two mounting frames spaced apart, a plate roller rotatable relative to the mounting frames, a guide assembly for guiding cardboard into the plate roller between the two mounting frames and on one side of the plate roller, an anilox roller on the side of the plate roller opposite to the guide assembly, the front and rear ends of the anilox roller rotatably connected to the two mounting frames, and the roller surface of the anilox roller contacting the roller surface of the plate roller, an ink-equalizing roller for squeezing out excess ink from the roller surface of the anilox roller above the anilox roller, a doctor blade for scraping out excess ink from the roller surface of the anilox roller between the two mounting frames, and an adjustment assembly for moving the doctor blade away from or towards the anilox roller between the doctor blade and the two mounting frames. This utility model provides a squeegee printing section for a printing press capable of switching between extrusion and squeegee printing modes.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology for paperboard printing, and in particular to a squeegee printing section of a printing press. Background Technology

[0002] In the corrugated board printing industry, controlling the ink volume on the anilox roller directly affects print quality. Traditional methods typically use a single doctor blade or ink distribution roller to regulate the ink. Doctor blade ink control allows for precise ink volume control, suitable for small characters and fine printing, but can lead to saturated colors in large-area printing. Ink distribution rollers, on the other hand, squeeze out ink to create a fuller, more even ink layer, suitable for large characters and full-page printing, but less effective for the clarity of small characters. Current technology lacks a flexible mechanism for quickly switching between these two modes, limiting the applicable printing range of a single machine. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of the prior art and provide a squeegee printing section for a printing press that can switch between two modes: extrusion ink and squeegee ink.

[0004] To achieve the above objectives, the present invention adopts the following solution: A squeegee printing section of a printing press includes: two mounting frames spaced apart, a plate roller rotatable relative to the mounting frames, a guide assembly for guiding cardboard into the plate rollers located between the two mounting frames and on one side of the plate rollers, an anilox roller located on the side of the plate rollers opposite to the guide assembly, the front and rear ends of the anilox roller being rotatably connected to the two mounting frames, and the roller surface of the anilox roller contacting the roller surface of the plate rollers, an ink-leveling roller for squeezing out excess ink from the roller surface of the anilox rollers located above the anilox rollers, a doctor blade for scraping off excess ink from the roller surface of the anilox rollers located between the two mounting frames, and an adjustment assembly for moving the doctor blade away from or towards the anilox rollers located between the doctor blade and the two mounting frames.

[0005] The adjustment assembly includes a first rotating shaft rotatably connected to the two mounting brackets, a first rotating plate that can rotate with the first rotating shaft, a scraper connected between the two first rotating plates, and a clearance groove provided on the first rotating plate to allow space for the anilox roller.

[0006] The mounting frame includes a mounting plate and a positioning plate disposed on the outside of the mounting plate. The end of the anilox roller passes through the mounting plate and is rotatably connected to the positioning plate through a first bearing. The end of the ink-leveling roller passes through the mounting plate and is rotatably connected to the positioning plate through a second bearing. The ink-leveling roller and the anilox roller are arranged vertically.

[0007] The mounting plate is provided with a first receiving groove that can accommodate the end of the anilox roller and a second receiving groove that can accommodate the end of the ink equalization roller. The first receiving groove and the second receiving groove are arranged vertically at intervals. The mounting plate is also provided with a first opening groove that extends from the first receiving groove to the end face of the mounting frame. The mounting frame is also provided with a second opening groove that extends from the second receiving groove to the end face of the mounting frame.

[0008] The guiding assembly includes a plurality of paper-carrying shafts spaced apart from the printing roller. The two ends of the paper-carrying shafts are rotatably connected to the mounting plate, and a first gap is formed between the plurality of paper-carrying shafts and the printing roller to allow the paperboard to pass through. The plurality of paper-carrying shafts are spaced vertically apart.

[0009] A second rotating shaft capable of rotating relative to the two mounting brackets is also provided between them. The second rotating shaft is located on the upper side of the printing roller, and a guide wheel that rotates with it is also provided on the second rotating shaft. There is a second gap between the guide wheel and the paper belt shaft, and the width of the second gap is smaller than the first gap.

[0010] The scraper includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate that are inclined to each other. The fourth connecting plate is connected to a blade body that can contact the anilox roller. A clearance groove is formed between the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate to make way for the ink distribution roller.

[0011] A synchronization assembly is provided between the printing roller, anilox roller, ink distribution roller, second rotating shaft, and multiple paper conveyor shafts. The synchronization assembly includes a first gear located at one end of the printing roller, a second gear located at the lower end of the paper conveyor shaft that meshes with the first gear, a protruding connecting shaft located on the outer side of the mounting plate, the connecting shaft located above the printing roller, a third gear located on the connecting shaft that meshes with the first gear, a fourth gear located on the second rotating shaft that meshes with the third gear, and a fifth gear located at the upper end of the paper conveyor shaft that meshes with the fourth gear.

[0012] The first rotating plate is L-shaped.

[0013] Compared with existing technologies, this utility model has the following advantages: In use, ink flows onto the anilox roller, which then transfers the ink to the printing roller as it rotates. The contact and separation between the doctor blade and the anilox roller can be quickly and easily controlled by adjusting the components. When the doctor blade disengages from the anilox roller, the ink is primarily homogenized by the ink-leveling roller, forming a full and uniform ink layer within and on the surface of the anilox grid. This is particularly suitable for large characters and full-page printing, resulting in vibrant colors. When printing small characters, the doctor blade contacts the anilox roller via the adjusting components, precisely scraping away excess ink overflowing from the anilox grid surface, leaving only a fixed amount of ink within the grid. This ensures clear printing of small characters. Through this dual ink-leveling mechanism combining "ink-leveling roller compression" and "doctor blade scraping," excess and uneven ink on the anilox roller can be removed as needed, adapting to different printing fonts and layouts, thus broadening its applicability. Attached Figure Description

[0014] Figure 1 This is one of the structural schematic diagrams of the squeegee printing section of the printing press of this utility model; Figure 2 This is the second structural schematic diagram of the squeegee printing section of the printing press of this utility model; Figure 3 This is the third structural schematic diagram of the squeegee printing section of the printing press of this utility model; Figure 4 This is the fourth structural schematic diagram of the squeegee printing section of the printing press of this utility model; Figure 5 This is a cross-sectional view of the squeegee printing section of the printing press of this utility model. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to embodiments: The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0016] like Figures 1 to 5As shown, a squeegee printing section of a printing press includes: two mounting frames 1 spaced apart, with a plate roller 2 rotatable relative to the two mounting frames 1; a guide assembly 3 for guiding cardboard into the plate roller 2 is located between the two mounting frames 1 and on one side of the plate roller 2; an anilox roller 4 is located on the side of the plate roller 2 opposite to the guide assembly 3; the front and rear ends of the anilox roller 4 are rotatably connected to the two mounting frames 1, and the roller surface of the anilox roller 4 is in contact with the roller surface of the plate roller 2; an ink-leveling roller 5 for squeezing out excess ink from the roller surface of the anilox roller 4 is located above the anilox roller 4; a doctor blade 61 for scraping out excess ink from the roller surface of the anilox roller 4 is located between the two mounting frames 1; and an adjustment assembly 62 for moving the doctor blade 61 away from or towards the anilox roller 4 is located between the doctor blade 61 and the two mounting frames 1.

[0017] In use, the ink flows onto the anilox roller 4, and as the anilox roller 4 rotates, it transfers the ink to the printing roller 2. By adjusting the component 62, the contact and separation between the doctor blade 61 and the anilox roller 4 can be quickly and easily controlled. When the doctor blade 61 disengages from the anilox roller 4, the ink is mainly homogenized by the ink-leveling roller 5, forming a full and uniform ink layer within and on the surface of the anilox roller 4. This is particularly suitable for large characters and full-page printing, resulting in bright colors. When printing small characters, the doctor blade 61 contacts the anilox roller 4 by adjusting the component 62, precisely scraping away excess ink overflowing from the surface of the anilox roller, leaving only a fixed amount of ink within the grid, thus ensuring clear printing of small characters. Through the dual ink-leveling mechanism combining "squeezing by the ink-leveling roller 5" and "scraping by the doctor blade 61," excess and uneven ink on the anilox roller 4 can be removed as needed, adapting to different printing fonts and layouts, and thus having a wider range of applications.

[0018] The adjustment assembly 62 includes a first rotating shaft 621 rotatably connected to two mounting brackets 1. A first rotating plate 622, capable of rotating with the shaft, is mounted on the first rotating shaft 621. A doctor blade 61 is connected between the two first rotating plates 622. A clearance groove 6221 is provided on the first rotating plate 622 to allow space for the anilox roller 4. A stepper motor or gear can be mounted at one end of the first rotating shaft 621 to precisely control the distance between the doctor blade 61 and the anilox roller 4. The operator only needs to drive the first rotating shaft 621 to rotate, which allows the doctor blade 61 to smoothly approach or move away from the anilox roller 4 via the first rotating plate 622, enabling quick and easy switching between ink scraping and ink equalization modes. The clearance groove 6221 provides space for the anilox roller 4 to avoid mechanical collisions or interference between the first rotating plate 622 and the anilox roller 4 during adjustment.

[0019] The mounting frame 1 includes a mounting plate 11 and a positioning plate 12 disposed on the outside of the mounting plate 11. The end of the anilox roller 4 passes through the mounting plate 11 and is rotatably connected to the positioning plate 12 via a first bearing 71. The end of the ink-leveling roller 5 passes through the mounting plate 11 and is rotatably connected to the positioning plate 12 via a second bearing 72. The ink-leveling roller 5 and the anilox roller 4 are arranged vertically. The combined structure of the mounting plate 11 and the positioning plate 12 provides precise and stable mounting positioning for the bearings of the anilox roller 4 and the ink-leveling roller 5, making the mounting positioning more convenient and stable.

[0020] The mounting plate 11 is provided with a first receiving groove 111 that can accommodate the end of the anilox roller 4 and a second receiving groove 112 that can accommodate the end of the ink-leveling roller 5. The first receiving groove 111 and the second receiving groove 112 are arranged vertically at intervals. The mounting plate 11 is also provided with a first opening groove 113 that extends from the first receiving groove 111 to the end face of the mounting frame 1. The mounting frame 1 is also provided with a second opening groove 114 that extends from the second receiving groove 112 to the end face of the mounting frame 1.

[0021] The first opening groove 113 and the second opening groove 114 allow the ends of the anilox roller 4 and the ink distribution roller 5 to be directly inserted into the first receiving groove 111 and the second receiving groove 112 from the side of the mounting frame 1, respectively, without the need for complex insertion or overall disassembly from above or along the axial direction, thus simplifying the installation.

[0022] The guiding component 3 includes a plurality of paper-carrying shafts 31 spaced apart from the printing roller 2. The two ends of each paper-carrying shaft 31 are rotatably connected to the mounting plate 11, and a first gap 100 is formed between the plurality of paper-carrying shafts 31 and the printing roller 2, allowing the paperboard to pass through. The plurality of paper-carrying shafts 31 are spaced vertically apart. Together, the plurality of paper-carrying shafts 31 form a channel with clear guidance, ensuring that the paperboard is stably supported before entering the printing roller 2. This effectively prevents the paperboard from sagging, warping, or shifting laterally during transport, ensuring that it enters the first gap 100 in a flat and stable state for printing, reducing defective products and improving the yield rate.

[0023] A second rotating shaft 81, capable of rotating relative to the two mounting brackets 1, is also provided between them. The second rotating shaft 81 is located above the printing roller 2, and a guide wheel 82 that rotates with it is also provided on the second rotating shaft 81. A second gap 101 is formed between the guide wheel 82 and the paper belt shaft 31, and the width of the second gap 101 is smaller than the width of the first gap 100 formed by the paper belt shaft 31 and the printing roller 2. When the paperboard is printed within the first gap 100, the second gap 101 clamps the paperboard, preventing the rear end of the paperboard from shaking or drifting, resulting in more accurate and clearer printing.

[0024] The scraper 61 includes a first connecting plate 611, a second connecting plate 612, a third connecting plate 613, and a fourth connecting plate 614 that are inclined to each other. A blade body 615, capable of contacting the anilox roller 4, is connected to the fourth connecting plate 614. A clearance groove 616 is formed between the first connecting plate 611, the second connecting plate 612, the third connecting plate 613, and the fourth connecting plate 614 to allow space for the ink-leveling roller 5. When performing the scraping function near the anilox roller 4, the clearance groove 616 between the connecting plates ensures that the blade body 615 and the connecting plates are completely spatially offset from the ink-leveling roller 5, guaranteeing that the "extrusion ink leveling" and "scraping ink leveling" mechanisms can operate independently yet work closely together.

[0025] A synchronization assembly 9 is provided between the printing roller 2, the anilox roller 4, the ink distribution roller 5, the second rotating shaft 81, and multiple paper-carrying shafts 31. The synchronization assembly 9 includes a first gear 91 located at one end of the printing roller 2, a second gear 92 located at the lower end of the paper-carrying shaft 31 that meshes with the first gear 91, a protruding connecting shaft 93 located on the outer side of the mounting plate 11, the connecting shaft 93 located above the printing roller 2, a third gear 94 located on the connecting shaft 93 that meshes with the first gear 91, a fourth gear 95 located on the second rotating shaft 81 that meshes with the third gear 94, and a fifth gear 96 located at the upper end of the paper-carrying shaft 31 that meshes with the fourth gear 95. Through the meshing transmission of the first gear 91, the second gear 92, the third gear 94, the fourth gear 95, and the fifth gear 96, the rotation speed and phase of the printing roller 2 (printing body), the anilox roller 4 (ink supply), the upper and lower paper belt shafts 31 (paper feeding guide), and the guide wheel 82 (end positioning) are strictly locked, eliminating errors and ensuring the synchronization of the paperboard conveying speed, ink transfer speed, and printing speed, thereby improving printing accuracy.

[0026] The first rotating plate 622 is L-shaped.

[0027] A transverse support rod (14) is also provided between the two mounting plates (11).

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A blade printing unit of a printing press, characterized in that include: Two mounting frames (1) are spaced apart. A printing roller (2) that can rotate relative to the two mounting frames (1) is provided on the two mounting frames (1). A guide component (3) that can guide the carton board is provided between the two mounting frames (1) and on one side of the printing roller (2). An anilox roller (4) is provided on the side of the printing roller (2) opposite to the guide component (3). The front and rear ends of the anilox roller (4) are rotatably connected to the two mounting frames (1), and the roller surface of the anilox roller (4) is in contact with the roller surface of the printing roller (2). An ink-smoothing roller (5) that can squeeze out excess ink from the roller surface of the anilox roller (4) is provided above the anilox roller (4). A doctor blade (61) that can scrape off excess ink from the roller surface of the anilox roller (4) is also provided between the two mounting frames (1). An adjustment component (62) that can make the doctor blade (61) move away from or close to the anilox roller (4) is also provided between the doctor blade (61) and the two mounting frames (1).

2. The squeegee printing section of the printing press according to claim 1, characterized in that, The adjustment assembly (62) includes a first rotating shaft (621) rotatably connected to the two mounting brackets (1), a first rotating plate (622) capable of rotating with the first rotating shaft (621), a scraper (61) connected between the two first rotating plates (622), and a clearance groove (6221) provided on the first rotating plate (622) capable of making way for the anilox roller (4).

3. The blade coater of the printing press according to claim 2, characterized in that, The mounting frame (1) includes a mounting plate (11) and a positioning plate (12) disposed on the outside of the mounting plate (11). The end of the anilox roller (4) passes through the mounting plate (11) and is rotatably connected to the positioning plate (12) through a first bearing (71). The end of the ink-equalizing roller (5) passes through the mounting plate (11) and is rotatably connected to the positioning plate (12) through a second bearing (72). The ink-equalizing roller (5) and the anilox roller (4) are arranged vertically.

4. The blade coater of the printing press according to claim 3, characterized in that, The mounting plate (11) is provided with a first receiving groove (111) that can accommodate the end of the anilox roller (4) and a second receiving groove (112) that can accommodate the end of the ink-equalizing roller (5). The first receiving groove (111) and the second receiving groove (112) are arranged vertically at intervals. The mounting plate (11) is also provided with a first opening groove (113) that extends from the first receiving groove (111) to the end face of the mounting frame (1). The mounting frame (1) is also provided with a second opening groove (114) that extends from the second receiving groove (112) to the end face of the mounting frame (1).

5. The blade coater of the printing press according to claim 3, wherein The guide assembly (3) includes a plurality of paper-carrying shafts (31) spaced apart from the printing roller (2). The two ends of the paper-carrying shafts (31) are rotatably connected to the mounting plate (11), and a first gap (100) is formed between the plurality of paper-carrying shafts (31) and the printing roller (2) to allow the paperboard to pass through. The plurality of paper-carrying shafts (31) are spaced vertically apart.

6. The blade coater of the printing press according to claim 5, characterized in that, A second rotating shaft (81) capable of rotating relative to the two mounting brackets (1) is also provided between them. The second rotating shaft (81) is located on the upper side of the printing roller (2), and a guide wheel (82) that follows the rotation of the second rotating shaft (81) is also provided on the second rotating shaft (81). There is a second gap (101) between the guide wheel (82) and the paper shaft (31). The width of the second gap (101) is smaller than that of the first gap (100).

7. The blade coater of the printing press according to claim 2, wherein The scraper (61) includes a first connecting plate (611), a second connecting plate (612), a third connecting plate (613) and a fourth connecting plate (614) that are inclined to each other. The fourth connecting plate (614) is connected to a blade body (615) that can contact the anilox roller (4). A clearance groove (616) is formed between the first connecting plate (611), the second connecting plate (612), the third connecting plate (613) and the fourth connecting plate (614) to make way for the ink distribution roller (5).

8. The blade coater of the printing press according to claim 6, wherein A synchronization component (9) is provided between the printing roller (2), the anilox roller (4), the ink distribution roller (5), the second rotating shaft (81), and multiple paper-carrying shafts (31). The synchronization component (9) includes a first gear (91) located at one end of the printing roller (2), a second gear (92) located at the end of the paper-carrying shaft (31) located on the lower side, which meshes with the first gear (91) for transmission, a protruding connecting shaft (93) located on the outer side of the mounting plate (11), the connecting shaft (93) located above the printing roller (2), a third gear (94) located on the connecting shaft (93) that meshes with the first gear (91) for transmission, a fourth gear (95) located on the second rotating shaft (81) that meshes with the third gear (94) for transmission, and a fifth gear (96) located at the end of the paper-carrying shaft (31) located on the upper side that meshes with the fourth gear (95) for transmission.

9. The blade coater of the printing press according to claim 2, wherein The first rotating plate (622) is L-shaped.

10. The blade coater of the printing press according to claim 3, wherein A transverse support rod (14) is also provided between the two mounting plates (11).

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