A doctor blade structure for a printing press

Abstract

The utility model relates to printing accessory equipment technical field especially relates to a scraper structure of printing machine. Including scraper body, scraper body is curved and is bent, and the upper end is the tip, and the scraper body inboard is located below the tip and sets up the receiving hopper, and the receiving hopper is along the length direction of scraper body setting, and the scraper body is equipped with the through blanking mouth, and the blanking mouth is butt jointed with the receiving hopper bottom end. Through the cooperation setting of receiving hopper, blanking mouth and the collection of material groove, the full -range collection and orientation to the scraping ink are realized, greatly solve the existing scraper ink drop pollution equipment, and the equipment cleaning cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of printing accessories equipment technology, and in particular to a doctor blade structure for a printing press. Background Technology

[0002] A printing press is a device used to print text and images. During its operation, the doctor blade plays a crucial role, primarily used to scrape away excess ink from the printing plate surface, ensuring consistent print quality. With the continuous development of the printing industry, the performance requirements for doctor blade structures are also increasing.

[0003] However, existing doctor blade structures still have many shortcomings in practical use: on the one hand, after the doctor blade removes excess ink, this ink often drips randomly, which not only contaminates the printing press table and other parts, but also increases the difficulty of cleaning the equipment; on the other hand, most doctor blade structures lack a stable self-tightening mechanism, and during long-term use, the contact pressure between the doctor blade and the structure to be removed is prone to change, resulting in unstable ink removal effect. When the pressure is insufficient, the ink removal will be incomplete, affecting the printing quality.

[0004] To address the shortcomings of the existing technology, this solution proposes a novel printing press doctor blade structure with an autonomous material receiving function, which can effectively collect the scraped ink. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a doctor blade structure for a printing press.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A doctor blade structure for a printing press includes a doctor blade body, which is curved and has a pointed tip at the top. A receiving hopper is provided inside the doctor blade body below the pointed tip. The receiving hopper is arranged along the length of the doctor blade body. A through discharge port is provided on the doctor blade body and is connected to the bottom of the receiving hopper.

[0007] Preferably, the receiving hopper is inclined upwards towards its tip.

[0008] Preferably, the end of the discharge port opposite to the receiving hopper is provided with a tapered material collection trough.

[0009] Preferably, it also includes two sets of mounting seats located on both sides of the scraper body. Both sets of mounting seats are provided with a sleeve shaft. A connecting plate is fixed on the outer edge surface of the sleeve shaft between the two sets of mounting seats. The connecting plate is detachably connected to the lower end of the scraper body.

[0010] Preferably, the lower end of the scraper body is provided with a T-shaped groove, a T-shaped plate is embedded in the T-shaped groove, and the lower end of the T-shaped plate is provided with an insertion hole for the connecting plate to be inserted.

[0011] Preferably, the scraper body has pads on both sides of its lower end.

[0012] Preferably, the sleeve is rotatably mounted on two mounting seats, and elastic elements are provided between the two ends of the sleeve and the two sets of mounting seats.

[0013] Preferably, both ends of the sleeve shaft can be detachably mounted with a rocker arm, the end of the rocker arm is provided with a straight slot hole, the mounting base is provided with a limiting shaft that passes through the straight slot hole, the elastic element is a top spring, the top spring is fitted on the limiting shaft and one end of the top spring abuts against the top of the limiting shaft and the other end abuts against the rocker arm.

[0014] Compared with the prior art, the present invention provides a doctor blade structure for a printing press, which has the following advantages: 1. This utility model, through the coordinated arrangement of the receiving hopper, the discharge port, and the collection trough, achieves the full collection and guidance of scraped ink, which greatly solves the problems of ink dripping from existing scrapers contaminating the equipment and wasting ink, and reduces the equipment cleaning cost; the constricted collection trough design improves the ink gathering effect and ensures that the ink can be collected stably.

[0015] 2. This utility model adopts a T-shaped groove and T-shaped plate matching structure to realize the detachable connection between the scraper body and the connecting plate. With the elastic gaskets on both sides, it not only ensures the stability of the connection, but also facilitates the quick installation and replacement of the scraper body, reducing equipment maintenance costs.

[0016] 3. In this utility model, the self-tightening structure drives the swing arm and sleeve shaft to rotate through the elastic force of the top spring, so that the tip of the scraper is always stably in contact with the structure to be scraped, automatically compensating for wear gaps and ensuring the stability of the scraping pressure.

[0017] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0018] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 .

[0019] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 .

[0020] Figure 3 This is a front view schematic diagram of the present invention.

[0021] Figure 4 This is a left-side view of the present invention.

[0022] Figure 5 For the present utility model Figure 3 A schematic diagram of the cross-section at point AA.

[0023] Figure 6 For the present utility model Figure 5 A schematic diagram of the separation.

[0024] Figure 7 For the present utility model Figure 5 A diagram illustrating the usage status.

[0025] In the diagram: 1. Scraper body; 2. Receiving hopper; 3. Discharge port; 4. Collection trough; 5. T-slot; 6. T-plate; 7. Connecting plate; 8. Gasket; 9. Mounting base; 10. Sleeve shaft; 11. Rocker arm; 12. Top spring; 13. Limiting shaft. Detailed Implementation

[0026] The following will refer to the appendix in the embodiments of this utility model. Figure 1-7 The technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0027] Example 1: To address the problem of ink dripping and contaminating equipment, resulting in waste, in existing doctor blade structures, this example provides a doctor blade structure for a printing press, including a doctor blade body 1. The doctor blade body 1 is curved, with a pointed upper end. The receiving hopper 2 is inclined upwards towards the pointed end and cooperates with the printing roller inside the printing press for ink scraping.

[0028] Inside the scraper body 1, directly below the tip, is an integrally formed receiving hopper 2. The receiving hopper 2 extends along the length of the scraper body 1 and has a trough-like structure, with its opening facing the tip of the scraper body 1. (See attached diagram.) Figure 6 As shown, the opening of the receiving hopper 2 extends horizontally towards the tip of the doctor blade body 1 facing the printing roller without directly contacting the printing roller. This completely covers the horizontal projection of the direct contact surface between the tip of the doctor blade body 1 and the printing roller, so that the scraped ink falls into the receiving hopper 2 as much as possible. Furthermore, the length of the doctor blade body 1 and the receiving hopper 2 is greater than that of the printing roller, allowing part of the printing roller to extend into the range of the receiving hopper 2, which can better receive the scraped ink and reduce the probability of ink splashing.

[0029] To achieve ink export and collection, refer to the appendix. Figure 5As shown, a through-hole 3 is provided on the scraper body 1 at the position corresponding to the bottom of the receiving hopper 2. The feeding port 3 is completely connected to the bottom of the receiving hopper 2, ensuring that the ink collected in the receiving hopper 2 can flow smoothly into the feeding port 3. At the same time, a tapered collecting trough 4 is integrally formed at the end of the feeding port 3 away from the receiving hopper 2. The diameter of the collecting trough 4 gradually decreases from the end connected to the feeding port 3 to the end, which facilitates the connection of an external conveying pipe to transport the collected ink to a recycling device or ink tank.

[0030] By coordinating the receiving hopper 2, the discharge port 3, and the collection trough 4, the entire process of collecting and guiding the scraped ink is achieved, which greatly solves the problem of ink dripping from the existing scraper and contaminating the equipment and wasting ink, and reduces the equipment cleaning cost; the constricted collection trough 4 design improves the ink aggregation effect and ensures that the ink can be collected stably.

[0031] In this embodiment, the scraper body, receiving hopper 2, collecting trough 4 and other components are at least black on their surfaces, forming a light-blocking layer to reduce the probability of the collected ink being directly exposed to light.

[0032] In Example 2, to install the doctor blade body 1, two sets of mounting seats 9 are typically bolted into the printing press housing. These two sets of mounting seats 9 are positioned on either side of the doctor blade body 1, and both sets of mounting seats 9 share a common sleeve shaft 10. A connecting plate 7 is welded and fixed to the outer edge of the sleeve shaft 10 between the two sets of mounting seats 9. The connecting plate 7 is elongated, extending in the same direction as the length of the doctor blade body 1. A T-shaped groove 5 is formed at the lower end of the doctor blade body 1, extending along its length. A T-shaped plate 6 is fitted into the T-shaped groove 5, with a sliding fit between the T-shaped plate 6 and the T-shaped groove 5. An insertion hole for the connecting plate 7 is formed on the lower end face of the T-shaped plate 6, the shape of which matches the cross-sectional shape of the connecting plate 7. After the connecting plate 7 is inserted into the insertion hole, the T-shaped plate 6 and the connecting plate 7 can be fixedly connected by bolts, thus achieving a detachable connection between the doctor blade body 1 and the sleeve shaft 10.

[0033] The mating structure of the T-slot 5 and the T-plate 6 makes the connection and positioning between the doctor blade body 1 and the connecting plate 7 more precise, effectively preventing the doctor blade body 1 from shifting laterally during operation and ensuring the stability of the ink scraping position. The detachable connection method facilitates quick replacement after the doctor blade body 1 wears out, without disassembling the entire mounting structure, reducing maintenance difficulty and improving maintenance efficiency.

[0034] In addition, gaskets 8 are attached to both sides of the lower end of the scraper body 1. The gaskets 8 are made of elastic rubber material and their size is adapted to the side dimensions of the lower end of the scraper body 1. The elastic gaskets 8 on both sides can play a buffering role when the scraper is working, reducing the rigid collision between the scraper body 1 and the connecting plate 7. At the same time, they can also fill the connection gap, enhance the stability of the connection structure, and prevent the connection from loosening due to vibration.

[0035] Example 3 addresses the problem of unstable contact pressure between the existing scraper structure and the structure to be scraped, leading to incomplete ink scraping or excessive scraper wear. In this embodiment, the sleeve shaft 10 is rotatably mounted on two mounting seats 9 via bearing seats. Both ends of the sleeve shaft 10 extend to the outside of the mounting seats 9. A rocker arm 11 is detachably mounted on both ends of the sleeve shaft 10 via bolts. The end of the rocker arm 11 has an elongated straight slot. A limiting shaft 13 is fixedly installed on the mounting seat 9 at the position corresponding to the straight slot. The limiting shaft 13 vertically penetrates the straight slot, and a limiting cap with a diameter larger than the width of the straight slot is threaded onto the top of the limiting shaft 13 to prevent the rocker arm 11 from falling off the limiting shaft 13.

[0036] In this embodiment, the elastic element is a top spring 12, which is fitted onto the limiting shaft 13. One end of the top spring 12 abuts against the limiting cap at the top of the limiting shaft 13, and the other end abuts against the upper surface of the swing rod 11.

[0037] Based on the above technical solution: Under the elastic action of the top spring 12, a downward pressure is continuously exerted on the swing arm 11. Since the swing arm 11 is fixedly connected to the sleeve shaft 10, this pressure will cause the sleeve shaft 10 to rotate around its axis. The rotation of the sleeve shaft 10 will then drive the scraper body 1 to rotate synchronously through the connecting plate 7, so that the tip of the scraper body 1 always tends to move closer to the structure to be scraped, thereby achieving stable contact between the scraper and the structure to be scraped. When the distance between the scraper tip and the structure to be scraped increases due to wear or other reasons, the top spring 12 will push the swing arm 11 to slide downward along the limiting shaft 13. Through the transmission of the sleeve shaft 10 and the connecting plate 7, the tip of the scraper body 1 will be driven to press against the structure to be scraped again.

[0038] The combination of top spring 12, rocker arm 11, and sleeve shaft 10 forms a stable self-tensioning mechanism, ensuring that the doctor blade body 1 and the structure to be scraped always maintain a suitable contact pressure, effectively avoiding incomplete scraping or excessive wear of the doctor blade due to pressure changes, and ensuring the stability of the scraping effect; the straight groove hole on the rocker arm 11 provides a guide for the movement of the rocker arm 11, ensuring the smoothness of the tensioning process, and the detachable rocker arm 11 design also facilitates the replacement and maintenance of the top spring 12.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A doctor blade structure for a printing press, characterized in that, Includes a scraper body (1), which is curved and has a pointed tip at the top. A receiving hopper (2) is provided on the inner side of the scraper body (1) below the pointed tip. The receiving hopper (2) is arranged along the length of the scraper body (1). A through discharge port (3) is provided on the scraper body (1), and the discharge port (3) is connected to the bottom of the receiving hopper (2).

2. The doctor blade structure of the printing press according to claim 1, characterized in that, The receiving hopper (2) is inclined upward towards the tip.

3. The doctor blade structure of the printing press according to claim 1, characterized in that, The discharge port (3) is provided with a tapered material collection trough (4) at the end opposite to the receiving hopper (2).

4. The doctor blade structure of the printing press according to claim 1, characterized in that, It also includes two sets of mounting seats (9) located on both sides of the scraper body (1). The two sets of mounting seats (9) are provided with a sleeve shaft (10). A connecting plate (7) is fixed on the outer edge surface of the sleeve shaft (10) between the two sets of mounting seats (9). The connecting plate (7) is detachably connected to the lower end of the scraper body (1).

5. The doctor blade structure of a printing press according to claim 4, characterized in that, The scraper body (1) has a T-shaped groove (5) at its lower end, and a T-shaped plate (6) is embedded in the T-shaped groove (5). The lower end of the T-shaped plate (6) has an insertion hole for the connecting plate (7) to be inserted.

6. The doctor blade structure of the printing press according to claim 4 or 5, characterized in that, Both sides of the lower end of the scraper body (1) are provided with pads (8).

7. The doctor blade structure of a printing press according to claim 4, characterized in that, The sleeve (10) is rotatably mounted on two mounting seats (9), and elastic elements are provided between the two ends of the sleeve (10) and the two sets of mounting seats (9).

8. The doctor blade structure of a printing press according to claim 7, characterized in that, Both ends of the sleeve shaft (10) can be detachably installed with a rocker arm (11). The end of the rocker arm (11) is provided with a straight slot hole. The mounting base (9) is provided with a limiting shaft (13) that passes through the straight slot hole. The elastic element is a top spring (12). The top spring (12) is fitted on the limiting shaft (13) and one end of the top spring (12) abuts against the top of the limiting shaft (13) and the other end abuts against the rocker arm (11).

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