A leather roller coater blade shift rotary doctor mechanism

Abstract

This utility model relates to the technical field of leather roller coating machines and discloses a blade-shifting rotary scraper mechanism for a leather roller coating machine. The mechanism includes a frame, a conveyor roller, and a finishing roller. The conveyor roller and the finishing roller are rotatably mounted to the frame via bearings. In this blade-shifting rotary scraper mechanism, the pressure plate, pressure plate, and scraper blade move back and forth repeatedly along the blade slide rail at the top of the blade holder base under the pushing action of a shifting cylinder, achieving a "spinning" action. Since the shifting mechanism is on the slide rail of the blade holder base, the entire blade holder does not shift, improving operational stability. Compared with existing technologies, during "spinning," the scraping accuracy of the scraper blade can be guaranteed as much as possible, and the scraping accuracy will not be affected by the shifting of the entire blade holder. The feed of the entire blade holder is a rotary feed, which has almost no impact on the scraping effect of the scraper. This ensures a stable scraping effect on the finishing roller.

Description

Technical Field

[0001] This utility model relates to the technical field of leather roller coating machines, specifically to a blade-rotating scraper mechanism for a leather roller coating machine. Background Technology

[0002] A leather roller coating machine is a device used to perform surface treatment (roller coating) on ​​leather. The coating roller used to transfer the coating has a concave pattern to carry the transferred coating. It needs to cooperate with a scraper component to scrape off excess coating from the surface of the coating roller to ensure the accuracy of the amount of coating transferred during roller coating.

[0003] In existing technologies, the general blade holder structure design uses a roller guide mechanism. Even if the entire blade structure is locked onto the blade holder track by rollers, and the track is installed on the roller coating machine frame, when working, the blade holder is pushed forward linearly by a linear drive, such as a cylinder, to advance the blade to the working position. The deformation of the blade generates a certain pressure on the coating roller, forming blade pressure. Some existing blade components also use a linear drive mechanism to move the blade holder track laterally, indirectly causing the blade to move slightly a few millimeters axially in the coating roller. This can clean the paint deposits stuck between the blade and the coating roller, and prevent abnormal line defects in the coating layer of the coating roller. This is called "blade slippage" in the industry.

[0004] In linear drive scraper forward and backward movement schemes, scrapers will wear out during the overall use. Generally, scrapers are replaced only after they wear down by 1-2 cm. At this time, since the overall scraper assembly height has not changed, the contact position between the scraper and the coating roller will change when the blade becomes shorter, which will indirectly change the scraping effect on the coating roller surface. When the scraper moves indirectly through the drive transverse scraper holder track, although a "scraping" action can be achieved, the entire structure, including the track, is driven to move at the same time. Under normal circumstances, this will lead to changes in scraper pressure and scraper position, resulting in unstable coating scraping effect on the coating roller surface and poor product coating. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a blade-shifting and rotating scraper mechanism for a leather roller coating machine. This mechanism solves the problems of poor scraping effect on the surface of the coating roller and unstable scraping effect on the coating roller surface after the blade becomes shorter, resulting in poor product coating.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a blade-driven rotating scraper mechanism for a leather roller coating machine, comprising a frame, a conveying roller, and a coating roller. The conveying roller is rotatably mounted to the frame via bearings, and the coating roller is rotatably mounted to the frame via bearings. The coating roller is positioned above the conveying roller, and a blade-driven rotating scraper device is provided on the right side of the coating roller. The blade-driven rotating scraper device smooths the coating on the surface of the coating roller. A blade holder limit adjustment device is provided below the blade-driven rotating scraper device, which limits and adjusts the distance between the blade-driven rotating scraper device and the coating roller.

[0009] Preferably, the blade-moving rotary scraper device includes a blade holder arm, a blade holder base, a blade holder rotary cylinder, a pressure plate, a pressure plate, a scraper blade, a rotary support, a cylinder seat, a blade slide rail, and a moving cylinder. The rotary support is fixedly installed on the frame, the bottom end of the blade holder arm is rotatably installed on the rotary support, the cylinder seat is fixedly installed on the frame, the right end of the blade holder rotary cylinder is rotatably connected to the cylinder seat, and the left end of the blade holder rotary cylinder is rotatably connected to the top end of the blade holder arm via a pin. The scraper blade is clamped between the pressure plate and the pressure plate through the cooperation of the pressure plate, the pressure plate, and bolts. The blade slide rail is located on the top of the blade holder base, and the pressure plate is slidably engaged above the blade slide rail. The pressure plate can slide back and forth along the inside of the blade slide rail. The moving cylinder is fixedly installed on the blade holder base, and the output end of the moving cylinder is also fixedly installed.

[0010] Preferably, the tool holder limit adjustment device includes a limit adjustment screw, a blocking block, a blocking slide rail seat, a blocking slide rail, and a blocking shaft. The limit adjustment screw is rotatably mounted to the frame via a bearing. The blocking slide rail is fixedly mounted to the frame via the blocking slide rail seat. The blocking block is slidably mounted below the blocking slide rail. The left end of the limit adjustment screw is connected to the blocking block via a thread. The blocking shaft is welded and fixed to the blocking block.

[0011] Preferably, the left end of the scraper blade is attached to the surface of the coating roller.

[0012] Preferably, the position where the blocking block connects to the limit adjusting screw is provided with a threaded groove. By rotating the limit adjusting screw, the blocking block is driven to slide left and right along the bottom of the blocking slide rail, and the blocking shaft is located on the left side of the tool holder swing arm.

[0013] Preferably, the pulsating cylinder repeatedly extends and retracts during operation.

[0014] Compared with the prior art, the present invention provides a blade-shifting and rotating scraper mechanism for a leather roller coating machine, which has the following advantages:

[0015] 1. The blade-shifting and rotating scraper mechanism of this leather roller coating machine involves the pressure plate, the pressure plate, and the scraper blade moving back and forth repeatedly along the blade slide rail at the top of the blade holder base under the pushing action of the shifting cylinder, thus realizing the "scraping" action. The shifting mechanism is on the slide rail of the blade holder base, so the overall blade holder does not shift, which improves the stability of operation. Compared with the existing technology, when performing "scraping", the scraping accuracy of the scraper blade can be guaranteed as much as possible, and the scraping accuracy will not be affected by the shifting of the overall blade holder.

[0016] 2. The leather roller coating machine features a blade-driven rotating scraper mechanism. The overall blade holder is fed in a rotating manner. Under this mechanism, even if the blades wear down, the extended length will decrease by only 1-2 cm over the entire service life. The change in the contact position of the blade tip on the coating roller is minimal, hardly affecting the scraping effect. This ensures a stable removal of excess material from the coating roller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the rotating tool holder of this utility model;

[0019] Figure 3 This is a top view of the overall structure of the rotary tool holder of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the overall structure of the rotary tool holder of this utility model.

[0021] The components include: 1. Frame; 2. Conveying roller; 3. Coating roller; 4. Blade-moving rotating scraper device; 41. Blade holder swing arm; 42. Blade holder base; 43. Blade holder rotating cylinder; 44. Pressure plate; 45. Pressure plate; 46. Scraper blade; 47. Rotating support seat; 48. Cylinder seat; 49. Blade slide rail; 50. Moving cylinder; 5. Blade holder limit adjustment device; 51. Limit adjustment screw; 52. Blocking block; 53. Blocking slide rail seat; 54. Blocking slide rail; 55. Blocking shaft. Detailed Implementation

[0022] 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.

[0023] Example 1:

[0024] like Figure 1-4 As shown, this utility model provides a blade-driven rotating scraper mechanism for a leather roller coating machine, including a frame 1, a conveying roller 2, and a coating roller 3. The conveying roller 2 is rotatably mounted to the frame 1 via bearings, and the coating roller 3 is rotatably mounted to the frame 1 via bearings. The coating roller 3 is positioned above the conveying roller 2. A blade-driven rotating scraper device 4 is provided on the right side of the coating roller 3. The blade-driven rotating scraper device 4 scrapes the coating on the surface of the coating roller 3. A blade holder limit adjustment device 5 is provided below the blade-driven rotating scraper device 4, which limits and adjusts the distance between the blade-driven rotating scraper device 4 and the coating roller 3.

[0025] like Figure 2-4 As shown, the blade-moving rotating scraper device 4 includes a blade holder arm 41, a blade holder base 42, a blade holder rotating cylinder 43, a pressure plate 44, a pressure plate 45, a scraper blade 46, a rotating support 47, a cylinder seat 48, a blade slide rail 49, and a moving cylinder 50. The rotating support 47 is fixedly installed on the frame 1. The bottom end of the blade holder arm 41 is rotatably installed on the rotating support 47. The cylinder seat 48 is fixedly installed on the frame 1. The right end of the blade holder rotating cylinder 43 is rotatably connected to the cylinder seat 48. The left end of the blade holder rotating cylinder 43 is rotatably connected to the top end of the blade holder arm 41 via a pin. Through the cooperation of the pressure plate 44, the pressure plate 45, and bolts, the scraper blade 46 is clamped between the pressure plate 44 and the pressure plate 45. The blade slide rail 49 is opened on the top of the blade holder base 42, and the pressure plate 44 is slidably engaged with the blade slide rail 50. Above the rail 49, the pressure plate 44 can slide back and forth along the inside of the blade slide rail 49. The traverse cylinder 50 is fixedly installed with the tool holder base 42. The output end of the traverse cylinder 50 is fixedly installed with 40. When the tool holder rotating cylinder 43 retracts, it pulls the top of the tool holder swing arm 41 to rotate clockwise along the rotating support 47. The rotating support 47 drives the entire blade traverse rotating scraper device 4 to rotate clockwise, so that the scraper blade 46 moves away from the coating roller 3. The guide slider may use other forms of guidance, such as circular guide rail, dovetail guide rail, or machining-type guide mechanism. The cylinder linear drive structure may use linear drive methods such as electric cylinder or rotary crank structure. The tool holder rotation method may directly use a direct drive motor or rotary cylinder to drive the entire tool holder, rather than linearly cooperating with the fulcrum rotation.

[0026] like Figure 4 As shown, the left end of the scraper blade 46 is attached to the surface of the coating roller 3. The coating is applied to the groove formed between the scraper blade 46 and the coating roller 3. When the coating roller 3 rotates, the coating in the groove can be evenly scraped onto the surface of the coating roller 3 by the scraper blade 46.

[0027] Example 2:

[0028] like Figure 1-4As shown, based on Example 1, the maximum angle of deflection of the blade-moving rotating scraper device 4 is limited and adjusted by the blade holder limit adjustment device 5.

[0029] The tool holder limit adjustment device 5 includes a limit adjustment screw 51, a blocking block 52, a blocking slide rail seat 53, a blocking slide rail 54, and a blocking shaft 55. The limit adjustment screw 51 is rotatably mounted to the frame 1 via a bearing. The blocking slide rail 54 is fixedly mounted to the frame 1 via the blocking slide rail seat 53. The blocking block 52 is slidably mounted below the blocking slide rail 54. The left end of the limit adjustment screw 51 is connected to the blocking block 52 via a thread. The blocking shaft 55 is welded and fixed to the blocking block 52.

[0030] like Figure 4 As shown, a threaded groove is provided at the position where the blocking block 52 is connected to the limit adjusting screw 51. The blocking block 52 is threadedly connected to the limit adjusting screw 51. By rotating the limit adjusting screw 51, the blocking block 52 is driven to slide left and right along the lower part of the blocking slide rail 54. The blocking shaft 55 is located on the left side of the tool holder swing arm 41. The blocking shaft 55 limits the maximum angle of the tool holder swing arm 41 to the left, so that when the tool holder swing arm 41 is deflected to the left and attached to the right side of the blocking shaft 55, the scraper blade 46 can stably maintain a close contact with the coating roller 3.

[0031] like Figure 3 As shown, the traverse cylinder 50 repeatedly extends and retracts during operation. During the repeated extension and retraction of the traverse cylinder 50, it drives the pressure plate 44, the pressure plate 45, and the scraper blade 46 to move repeatedly, thus scraping the coating on the surface of the coating roller 3.

[0032] In use, the tool holder rotating cylinder 43 is extended, pushing the tool holder swing arm 41 to rotate counterclockwise along the rotating support base 47. This rotation causes the tool holder base 42, the pressure plate 44, the pressure plate 45, and the scraper blade 46 to rotate as well. After the tool holder swing arm 41 rotates counterclockwise until it contacts the blocking shaft 55, it is blocked by the blocking shaft 55, reaching its maximum deflection angle. Rotating the limit adjusting screw 51 causes the blocking block 52 to move laterally, which in turn causes the blocking shaft 55 to move laterally. Adjusting the position of the blocking shaft 55 allows for adjustment of the maximum deflection angle of the tool holder swing arm 41. The process involves adjusting the blade 46 so that its deflected edge adheres to the surface of the coating roller 3, forming a groove between the coating roller 3 and the blade 46. Paint is then added into the groove. The blade holder limit adjustment device 5 is then activated, and the traversing cylinder 50 drives the pressure plate 44, pressure plate 45, and blade 46 to move repeatedly along the blade slide rail 49. As the blade 46 moves repeatedly along the surface of the coating roller 3, it prevents paint from accumulating between the blade 46 and the coating roller 3, thus avoiding abnormal line defects in the coating layer of the coating roller. The coating roller 3 rotates, pressing the evenly applied paint downwards onto the material surface held between the transfer roller 2 and the coating roller 3.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blade-shifting and rotating scraper mechanism for a leather roller coating machine, comprising a frame (1), a conveying roller (2), and a coating roller (3), characterized in that: The conveying roller (2) is rotatably mounted to the frame (1) via bearings, and the coating roller (3) is rotatably mounted to the frame (1) via bearings. The coating roller (3) is positioned above the conveying roller (2). A blade-moving rotating scraper device (4) is provided on the right side of the coating roller (3). The blade-moving rotating scraper device (4) scrapes the coating on the surface of the coating roller (3) to smooth it. A blade holder limiting adjustment device (5) is provided below the blade-moving rotating scraper device (4). The blade holder limiting adjustment device (5) limits and adjusts the distance between the blade-moving rotating scraper device (4) and the coating roller (3).

2. The blade-shifting and rotating scraper mechanism for a leather roller coating machine according to claim 1, characterized in that: The blade-moving rotating scraper device (4) includes a blade holder arm (41), a blade holder base (42), a blade holder rotating cylinder (43), a pressure plate (44), a pressure plate (45), a scraper blade (46), a rotating support seat (47), a cylinder seat (48), a blade slide rail (49), and a moving cylinder (50). The rotating support seat (47) is fixedly installed on the frame (1). The bottom end of the blade holder arm (41) is rotatably installed on the rotating support seat (47). The cylinder seat (48) is fixedly installed on the frame (1). The right end of the blade holder rotating cylinder (43) is rotatably connected to the cylinder seat (48). The left end of the cylinder (43) is rotatably connected to the top of the tool holder swing arm (41) by a pin. The scraper blade (46) is clamped between the pressure plate (44) and the pressure plate (45) by the cooperation of the pressure plate (44), the pressure plate (45) and the bolt. The blade slide rail (49) is opened on the top of the tool holder base (42). The pressure plate (44) is slidably engaged above the blade slide rail (49). The pressure plate (44) can slide back and forth along the inside of the blade slide rail (49). The traversing cylinder (50) is fixedly installed with the tool holder base (42). The output end of the traversing cylinder (50) is fixedly installed with (40).

3. The blade-shifting rotary scraper mechanism for a leather roller coating machine according to claim 2, characterized in that: The tool holder limit adjustment device (5) includes a limit adjustment screw (51), a blocking block (52), a blocking slide rail seat (53), a blocking slide rail (54), and a blocking shaft (55). The limit adjustment screw (51) is rotatably installed on the frame (1) through a bearing. The blocking slide rail (54) is fixedly installed on the frame (1) through the blocking slide rail seat (53). The blocking block (52) is slidably installed below the blocking slide rail (54). The left end of the limit adjustment screw (51) is connected to the blocking block (52) through a thread. The blocking shaft (55) is welded and fixed to the blocking block (52).

4. The blade-shifting and rotating scraper mechanism for a leather roller coating machine according to claim 3, characterized in that: The left end of the scraper blade (46) is attached to the surface of the coating roller (3).

5. The blade-shifting rotary scraper mechanism for a leather roller coating machine according to claim 4, characterized in that: The blocking block (52) is provided with a threaded groove at the position where it connects with the limit adjusting screw (51). By rotating the limit adjusting screw (51), the blocking block (52) is driven to slide left and right below the blocking slide rail (54). The blocking shaft (55) is located on the left side of the tool holder swing arm (41).

6. The blade-shifting rotary scraper mechanism for a leather roller coating machine according to claim 5, characterized in that: The pulsating cylinder (50) repeatedly extends and retracts during operation.

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