Ink scraping device for printing machine

Abstract

The utility model relates to the field of printing, in particular to an ink scraping device for a printing machine, which comprises a mounting seat arranged above an ink roller, a first fixing arm used for fixing an inking joint and a second fixing arm used for fixing a scraper seat, wherein the first fixing arm and the second fixing arm are both fixed on a rotating joint and are in rotary fit with the mounting seat through the rotating joint; the rotation axis and the axis of the ink roller are arranged in parallel, and the rotary connector is driven by a power source to rotate so as to drive one of the inking connector and the scraper base to abut against the surface of the ink roller. According to the utility model, the scraper mechanism and the ink coating mechanism are integrally arranged and are driven by a single power source to be switched between two working modes, so that the space occupancy rate is low.

Description

Technical Field

[0001] This utility model relates to the printing field, specifically to a doctor blade device for a printing press. Background Technology

[0002] As a core component in printing, the ink roller needs to be coated with ink by an ink coating mechanism before printing, as described in announcement number "CN222202035U". After printing, the ink adhering to the surface needs to be wiped off to prevent the ink from solidifying and affecting the next printing operation.

[0003] After traditional printing operations, employees typically wipe the ink rollers manually with yarn, which is often inefficient and leaves the ink rollers uncleaned. Furthermore, the release of harmful gases during the wiping process can negatively impact the health of employees. Although automated doctor blade structures exist that can be installed on printing presses, the doctor blade and the inking mechanism are prone to interference due to their relative positions. If an independent doctor blade mechanism is installed, the doctor blade and the inking mechanism must be independently arranged on both sides of the ink roller, and each must be powered by a separate power source, which occupies a significant amount of installation space. Therefore, this issue urgently needs to be addressed. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a doctor blade device for printing presses. This utility model integrates the doctor blade mechanism and the inking mechanism, and switches between two working modes by a single power source, resulting in low space occupancy.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A doctor blade device for a printing press includes a mounting base disposed above an ink roller. A first fixing arm for fixing an ink application connector and a second fixing arm for fixing a doctor blade holder are both fixed on a rotary joint and rotate with the mounting base through the rotary joint. The rotation axis is arranged parallel to the axis of the ink roller. The rotary joint is driven to rotate by a power source so that one of the ink application connector and the doctor blade holder can abut against the surface of the ink roller.

[0007] As a further embodiment of this utility model: the doctor blade holder includes a recycling box hinged to the doctor blade holder, the recycling box being open on the side facing the ink roller, and a doctor blade being provided at the opening; a swing arm is also hinged to the doctor blade holder, and a wiping roller is provided at the end of the swing arm, which is arranged parallel to the ink roller to wipe the roller surface; the hinge axes of the swing arm and the recycling box are both arranged parallel to the axis of the ink roller, and the swing arm and the recycling box are connected by a tension spring, and the wiping roller is located at the downstream end of the recycling box along the rotation direction of the ink roller.

[0008] As a further improvement of this utility model: a detachable suspension spring is installed on the scraper seat, and the recycling box is connected to the scraper seat through the suspension spring.

[0009] As a further embodiment of this utility model: the second fixed arm or scraper seat is also equipped with an atomizing nozzle for spraying alcohol onto the surface of the ink roller, and the atomizing nozzle is located at the upstream end of the recycling box along the rotation direction of the ink roller.

[0010] As a further improvement of this utility model, the scraper is inserted into the opening of the recycling box to form a detachable fixation.

[0011] As a further improvement of this utility model: the surface of the wiping roller is provided with Velcro, and the cleaning cloth is detachably fixed to the surface of the wiping roller by the Velcro.

[0012] As a further improvement of this utility model: the first fixed arm and the second fixed arm are arranged in a V-shape, with the V-shaped opening facing the ink roller surface.

[0013] As a further embodiment of this utility model: the power source is a linear cylinder mounted on the mounting base, one end of the linear cylinder is hinged to the mounting base, and the other end is hinged to the first fixed arm or the second fixed arm, and each hinge axis is arranged parallel to the axis of the ink roller.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model integrates the doctor blade mechanism and the inking mechanism, using a single power source to drive the rotary joint to rotate, allowing for switching between inking and doctor blade operation modes without interference, and with low structural space occupancy. In the first operating state, the printing press operates normally, the inking connector contacts the ink roller and continuously applies ink, and the doctor blade seat disengages from the ink roller. In the second operating state, the printing press and the ink roller stop working, the inking connector disengages from the ink roller, and the doctor blade seat contacts the ink roller to scrape ink and clean it.

[0016] 2. During the ink scraping operation, the wiping roller and the scraper are elastically pressed against the ink roller surface by the action of the tension spring, avoiding rigid damage to the ink roller; in order to facilitate the adjustment of the tilt angle of the recycling box, the recycling box and the scraper seat are connected by a suspension spring. By replacing the suspension springs of different lengths, the elastic tension on the recycling box can be adjusted to adjust the tilt angle of the recycling box and to provide a traction effect on the recycling box.

[0017] 3. The cleaning cloth of this utility model is detachably fixed to the roller surface of the wiping roller by Velcro. After wiping, the cleaning cloth can be replaced and cleaned, and the disassembly and assembly are quick and easy.

[0018] 4. This utility model cleans the ink roller by sequentially using alcohol atomization, ink scraping with a doctor blade, and wiping with a cleaning cloth, resulting in extremely high cleaning efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the picture:

[0021] 1. Mounting base; 2. Rotary joint; 3. First fixed arm; 31. Inking connector;

[0022] 4. Second fixed arm; 41. Atomizing nozzle;

[0023] 5. Scraper holder; 51. Recycling box; 511. Scraper;

[0024] 52. Suspension spring; 53. Swing rod; 54. Counter-tension spring; 55. Wiping roller; 56. Cleaning cloth;

[0025] 6. Linear cylinder; 7. Ink roller. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 In this embodiment of the present invention, a doctor blade device for a printing press includes a mounting base 1 positioned directly above an ink roller 7. A rotating joint 2 is fixed to the bottom of the mounting base 1 via a cantilever, and the rotation axis of the rotating joint 2 is arranged parallel to the rotation axis of the ink roller 7. A first fixed arm 3 and a second fixed arm 4 are fixed to the rotating joint 2 and are arranged in a V-shaped opening, preferably with an opening angle of 90 degrees, and the opening faces downwards towards the surface of the ink roller 7.

[0028] The end of the first fixed arm 3 is equipped with an ink-filling connector 31, which is arranged along the length of the ink roller 7. When the ink-filling connector 31 contacts the surface of the ink roller 7, it applies ink to the ink roller 7. The end of the second fixed arm 4 is equipped with a doctor blade seat 5. When the recovery box 51 on the doctor blade seat 5 contacts the surface of the ink roller 7, it scrapes off the excess ink from the surface of the ink roller 7 and recovers it.

[0029] A linear cylinder 6 is mounted on the mounting base 1. One end of the linear cylinder 6 is hinged to the mounting base 1, and the other end is hinged to either the first fixed arm 3 or the second fixed arm 4. The axes of these hinges are all parallel to the axis of the ink roller 7. The extension and retraction of the linear cylinder 6 drives the rotary joint 2 to rotate. During the rotation of the rotary joint 2, two working states are switched. In the first working state, the printing press operates normally, the inking connector 31 contacts the ink roller 7 and continuously applies ink, and the doctor blade seat 5 disengages from the ink roller 7. In the second working state, the printing press and the ink roller 7 stop working, the inking connector 31 disengages from the ink roller 7, and the doctor blade seat 5 contacts the ink roller 7 and scrapes ink to clean the ink roller 7.

[0030] A collection box 51 is hinged to the doctor blade holder 5. The end of the collection box 51 facing the ink roller 7 is open, and a doctor blade 511 is inserted and fixed at the bottom of the opening. During ink scraping operations, the collection box 51 is tilted, with the opening tilted upwards. To facilitate adjustment of the tilt angle of the collection box 51, the collection box 51 is connected to the doctor blade holder 5 by a suspension spring 52. By changing the suspension spring 52 of different lengths, the elastic tension on the collection box 51 can be adjusted to adjust the pitch angle of the collection box 51 and provide a traction effect.

[0031] A swing arm 53 is also hinged to the scraper holder 5. A wiping roller 55 is installed at the end of the swing arm 53. Velcro is provided on the roller surface of the wiping roller 55. The cleaning cloth 56 is detachably fixed to the roller surface of the wiping roller 55 by the Velcro. The cleaning cloth 56 can be replaced and cleaned after wiping.

[0032] A tension spring 54 is provided between the swing arm 53 and the recycling box 51. During the ink scraping operation, the wiping roller 55 and the scraper 511 are elastically pressed against the surface of the ink roller 7 by the tension spring 54 to avoid rigid damage to the ink roller 7.

[0033] The second fixed arm 4 is equipped with an atomizing nozzle 41 for spraying alcohol onto the surface of the ink roller 7, thereby dissolving ink stains adhering to the roller surface through atomized alcohol. Along the rotation direction of the ink roller 7, the atomizing nozzle 41 is located at the upstream end of the recycling box 51, and the wiping roller 55 is located at the downstream end of the recycling box 51.

[0034] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0035] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A doctor blade device for a printing press, characterized in that, The mounting base (1) is located above the ink roller (7). The first fixing arm (3) for fixing the ink connector (31) and the second fixing arm (4) for fixing the doctor blade seat (5) are both fixed on the rotating joint (2). The rotating joint (2) and the mounting base (1) are rotated together. The axis of rotation is arranged parallel to the axis of the ink roller (7). The rotating joint (2) is driven to rotate by the power source so that the ink connector (31) and the doctor blade seat (5) can be selected to abut against the roller surface of the ink roller (7).

2. The ink-scraping device for a printing press according to claim 1, characterized in that, The scraper holder (5) includes a recycling box (51) hinged to the scraper holder (5). The recycling box (51) is open on the side facing the ink roller (7), and a scraper (511) is provided at the opening. A swing arm (53) is also hinged to the scraper holder (5). A wiping roller (55) is provided at the end of the swing arm (53) and is arranged parallel to the ink roller (7) to wipe the roller surface. The hinge axis of the swing arm (53) and the recycling box (51) are both arranged parallel to the axis of the ink roller (7). The swing arm (53) and the recycling box (51) are connected by a tension spring (54). Along the rotation direction of the ink roller (7), the wiping roller (55) is located at the downstream end of the recycling box (51).

3. The ink-scraping device for a printing press according to claim 2, characterized in that, A detachable suspension spring (52) is installed on the scraper seat (5), and the recycling box (51) is connected to the scraper seat (5) through the suspension spring (52).

4. The ink-scraping device for a printing press according to claim 2, characterized in that, The second fixed arm (4) or scraper seat (5) is also equipped with an atomizing nozzle (41) for spraying alcohol onto the surface of the ink roller (7). The atomizing nozzle (41) is located at the upstream end of the recycling box (51) along the rotation direction of the ink roller (7).

5. A doctor blade device for a printing press according to any one of claims 2 to 4, characterized in that, The scraper (511) is inserted into the opening of the recycling box (51) to form a detachable fixation.

6. A doctor blade device for a printing press according to any one of claims 2 to 4, characterized in that, The wiping roller (55) has Velcro on its roller surface, and the cleaning cloth (56) is detachably fixed to the roller surface of the wiping roller (55) by Velcro.

7. A doctor blade device for a printing press according to any one of claims 1 to 4, characterized in that, The first fixed arm (3) and the second fixed arm (4) are arranged in a V-shape, with the V-shaped opening facing the roller surface of the ink roller (7).

8. A doctor blade device for a printing press according to any one of claims 1 to 4, characterized in that, The power source is a linear cylinder (6) mounted on the mounting base (1). One end of the linear cylinder (6) is hinged to the mounting base (1), and the other end is hinged to the first fixed arm (3) or the second fixed arm (4). The axis of each hinge is arranged parallel to the axis of the ink roller (7).

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