Coating roller scraping mechanism and printing machine

Abstract

The utility model discloses a coating roller scraping mechanism and a printing machine, and particularly relates to the printing machine, which comprises a feeding roller and a coating roller which are in rolling connection, the scraping plate comprises a shoveling and scraping blade, a preset distance is kept between the shoveling and scraping blade and the surface of the feeding roller, an elastic slide is arranged on the blade facing surface of the shoveling and scraping blade, and a preset distance is kept between the elastic slide and the blade facing surface to form a secondary coating conservation cavity; the elastic slide is divided into an inner groove conservation groove, a first arc-shaped surface winding piece and a second arc-shaped surface piece according to the structure, wherein the arc top of the outer side of the first arc-shaped surface winding piece is in contact with the surface of the feeding roller; and the arc top of the inner side of the second arc-shaped surface piece faces the surface of the feeding roller. The scraping plate and the elastic slide are utilized to form a secondary interception system, so that the amount of paint attached to the painting roller after being scraped by the scraping mechanism is kept within a preset value, and the situation that local paint is too much is avoided.

Description

Technical Field

[0001] The utility model relates to a printing press, in particular to a coating roller scraping mechanism and a printing press. Background Art

[0002] The roller scraping mechanism of the printing press consists of a scraper, a scraper and a scraper holder. The scraper holder allows the scraper to maintain an appropriate contact angle with the printing plate surface. The scraper is responsible for scraping off excess ink, leaving only the necessary ink on the printing plate to ensure the quality of the printed product.

[0003] Reference publication (announcement) number: CN112339403A, publication (announcement) date: 2021-02-09, a cardboard printing coating mechanism is disclosed, and the key points of its technical solution are: a cardboard printing coating mechanism, including a frame, the frame is rotatably connected with a coating roller and a feed roller for conveying coating, the feed roller is located directly above the coating roller and fits the feed roller, the side wall of the coating roller is provided with a plurality of convex molds for hard brushes, the coating roller is hollow, the coating roller is provided with a telescopic component for controlling the convex mold to extend and retract along the radial direction of the coating roller, and the frame is provided with a scraper for scraping off excess coating on the side wall of the coating roller, and the scraper abuts against the side wall of the coating roller. The present invention facilitates the removal of excess coating on the coating roller, ensures that the embossed pattern on the surface of the cardboard is clear, improves printing efficiency and saves coating.

[0004] In the prior art including the above patent, the excess paint on the surface of the feed roller is scraped off with a single blade, and during the scraping process, the paint will accumulate on one side of the scraping blade, and then the accumulated paint on the side will be sucked out by an external suction mechanism. However, the scraping effect of a single blade is relatively limited, and there will still be a situation where there is too much paint in some parts. Utility Model Content

[0005] The utility model aims to provide a coating roller scraping mechanism and a printing press, which are used to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a paint roller scraping mechanism, comprising:

[0007] Roll-connected feed and paint rollers;

[0008] A scraper plate, comprising a scraping blade which is kept at a predetermined distance from the surface of the feed roller, wherein an elastic glass sheet is provided on the blade surface of the scraping blade, and a predetermined distance is kept between the elastic glass sheet and the blade surface to form a secondary coating conservation cavity;

[0009] The elastic glass sheet is divided into an inner groove, a first arc-shaped surface-wrapping member and a second arc-shaped surface member according to the structure, wherein:

[0010] The outer arc top of the first arc-shaped winding surface member is in contact with the surface of the feeding roller;

[0011] The inner arc top of the second arc-shaped surface member faces the surface of the feeding roller.

[0012] Preferably, a plurality of guide grooves arranged in a linear array are formed on the upper end surface of the elastic glass slide, and a vibration tongue extending toward a port of the guide groove is provided in the guide groove.

[0013] Preferably, the guide groove is divided into a rectangular portion and a frustum portion according to its shape, and the narrow mouth of the frustum portion is located at the outer arc top of the first arc-shaped winding surface member.

[0014] Preferably, a predetermined interval is maintained between the vibration tongue and the guide groove, and the interval is connected to a notch opened on one side of the inner groove culvert.

[0015] Preferably, the apex of the vibration tongue is close to the surface of the feed roller.

[0016] Preferably, a threaded tube is provided in the scraping blade, and an inlet of the threaded tube is connected to the secondary paint conservation chamber.

[0017] Preferably, the elastic glass slide is an elastic polyethylene plate.

[0018] Preferably, the vibration tongue is a copper alloy sheet, and the vertex is a triangular structure.

[0019] A printing machine comprises the coating roller scraping mechanism described in the above scheme.

[0020] In the above technical scheme, a paint roller scraper mechanism and a printing machine provided by the utility model have the following beneficial effects: the feed rollers in the embodiments are in contact with the tip of the scraping blade and the outer arc top of the first arc-shaped winding member of the elastic glass slide, forming a secondary scraping effect, and double-knife scraping is adopted, wherein: the elastic glass slide intercepts a large amount of paint from the feed roller, and then intercepts it for the second time at the tip of the scraping blade, thereby ensuring that the amount of paint attached to the paint roller after being scraped by the scraper mechanism remains within a predetermined value, so as to avoid the occurrence of excessive local paint.

[0021] The paint scraped off by the elastic glass slide in the embodiment will accumulate in the inner groove conservation groove, while the paint scraped off by the scraping blade will accumulate between the elastic glass slide and the facing surface to form a secondary paint conservation cavity, and the inner groove conservation groove is connected to the secondary paint conservation cavity. The small groove structure design makes it easier to accumulate and fill the paint, thereby ensuring that the paint bubble content is reduced to a minimum during the suction and discharge circulation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of the implementation structure provided for an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the structure of a scraper plate provided in an embodiment of the utility model;

[0025] Figure 3 A schematic cross-sectional structure diagram of a scraper plate and an elastic glass slide provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Feed roller; 2. Paint roller; 3. Scraper plate; 31. Scraping blade; 4. Elastic glass slide; 41. Inner groove conservation groove; 42. First arc-shaped winding surface member; 43. Second arc-shaped surface member; 5. Guide groove; 51. Rectangular part; 52. Cone part; 6. Vibrating tongue; 7. Threaded tube; 8. Back-up roller; 100. Secondary paint conservation chamber; 200. Interval. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-3 As shown, a coating roller scraping mechanism and a printing press, comprising:

[0030] A feeding roller 1 and a paint roller 2 connected in a rolling manner;

[0031] The scraper plate 3 includes a scraping blade 31 which is kept at a predetermined distance from the surface of the feeding roller 1, and an elastic glass sheet 4 (the elastic glass sheet 4 is an elastic polyethylene sheet) is provided on the blade surface of the scraping blade 31. A predetermined distance is kept between the elastic glass sheet 4 and the blade surface to form a secondary coating material conservation chamber 100;

[0032] The elastic glass slide 4 is divided into an inner groove conservation groove 41, a first arc-shaped winding surface member 42, and a second arc-shaped surface member 43 according to the structure, wherein:

[0033] The outer arc top of the first arc-shaped winding surface member 42 contacts the surface of the feeding roller 1;

[0034] The inner arc top of the second arc-shaped surface member 43 faces the surface of the feeding roller 1 .

[0035] Specifically, the workpiece passes between the backup roller 8 and the paint roller 2 , and the paint on the paint roller 2 is supplied by the supply roller 1 .

[0036] Furthermore, the inner tank conserving tank 41 in the embodiment is provided with a plurality of through holes arranged in a linear array, and the through holes are connected to the secondary coating conserving chamber 100. The embodiment also includes a suction pump, which is used to suck away the liquid in the secondary coating conserving chamber 100. In the embodiment, because the secondary coating conserving chamber 100 is the angle between the elastic glass slide 4 and the facing surface, it will inevitably fill the vertex of the angle under the influence of the tension of the liquid, which is determined by the physical properties of the liquid and is common knowledge, and will not be described in detail.

[0037] In the above technology, the feed roller 1 in the embodiment contacts the tip of the scraping blade 31 and the outer arc top of the first arc-shaped winding member 42 of the elastic glass slide 4, forming a secondary scraping effect, and adopts double-knife scraping, wherein: the elastic glass slide 4 intercepts a large amount of paint from the feed roller 1, and then is intercepted for the second time by the tip of the scraping blade 31, thereby ensuring that the amount of paint attached to the paint roller 2 after being scraped by the scraping mechanism remains within a predetermined value, thereby avoiding the occurrence of excessive local paint.

[0038] Secondly, the paint scraped off by the elastic glass slide 4 will accumulate in the inner groove conservation groove 41, and the paint scraped off by the scraping blade 31 will accumulate between the elastic glass slide 4 and the blade surface to form a secondary paint conservation cavity 100, and the inner groove conservation groove 41 is connected to the secondary paint conservation cavity 100. The small groove structure design makes it easier to accumulate and fill the paint, thereby ensuring that the paint bubble content is reduced to a minimum during the suction and discharge cycle.

[0039] As an embodiment further provided by the utility model, a plurality of guide grooves 5 arranged in a linear array are provided on the upper end surface of the elastic glass slide 4 , and a vibration tongue 6 extending toward the end of the guide groove 5 is provided in the guide groove 5 .

[0040] Furthermore, the guide groove 5 is divided into a rectangular portion 51 and a frustum portion 52 according to its shape, and the narrow mouth of the frustum portion 52 is located at the outer arc top of the first arc-shaped winding surface member 42 .

[0041] Furthermore, the apex of the flap 6 is close to the surface of the feed roller 1 .

[0042] Specifically, the tension of the coating in the embodiment will go up along the narrow opening of the frustum portion 52 and fill the entire rectangular portion 51 under the guidance of the vibration tongue 6. The vibration tongue 6 in the embodiment is a copper alloy sheet, and the vertex is a triangular structure.

[0043] As another embodiment further provided by the utility model, a predetermined interval 200 is maintained between the vibration tongue 6 and the guide groove 5, and the interval 200 is communicated with a gap opened on one side of the inner groove conservation groove 41.

[0044] Specifically, in the embodiment, the tension of the paint will go up along the narrow mouth of the frustum portion 52, and fill the entire rectangular portion 51 under the guidance of the vibrating tongue 6. As the paint continues to accumulate during the scraping process, it will enter the inner groove conservation groove 41 through the interval 200, thereby accumulating and filling the entire inner groove conservation groove 41.

[0045] As another embodiment further provided by the utility model, a threaded tube 7 is provided in the scraping blade 31 , and an inlet of the threaded tube 7 is connected to the secondary paint conservation chamber 100 .

[0046] Specific, combined Figure 3 It can be seen that the number of the threaded tubes 7 in the embodiment is multiple and they are arranged in a linear array along the scraping blade 31, and the suction ports of the multiple threaded tubes 7 are connected to the suction pump through parallel connecting pipes, so that the multiple threaded tubes 7 can be sucked simultaneously during operation.

[0047] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A paint roller scraping mechanism, comprising: A feeding roller (1) and a paint roller (2) connected in a rolling manner; A scraper plate (3), comprising a scraping blade (31) which is spaced at a predetermined distance from the surface of the feed roller (1), characterized in that an elastic glass sheet (4) is provided on the facing surface of the scraping blade (31), and a predetermined distance is maintained between the elastic glass sheet (4) and the facing surface to form a secondary coating material conservation cavity (100); The elastic glass slide (4) is divided into an inner groove conservation groove (41), a first arc-shaped winding surface component (42) and a second arc-shaped surface component (43) according to the structure, wherein: The outer arc top of the first arc-shaped winding surface member (42) contacts the surface of the feeding roller (1); The inner arc top of the second arc-shaped surface member (43) faces the surface of the feeding roller (1).

2. A paint roller scraping mechanism according to claim 1, characterized in that: The upper end surface of the elastic glass slide (4) is provided with a plurality of guide grooves (5) arranged in a linear array, and a vibration tongue (6) extending towards an end of the guide groove (5) is provided in the guide groove (5).

3. A paint roller scraping mechanism according to claim 2, characterized in that: The guide groove (5) is divided into a rectangular portion (51) and a frustum portion (52) according to its shape, and the narrow opening of the frustum portion (52) is located at the outer arc top of the first arc-shaped winding surface member (42).

4. A paint roller scraping mechanism according to claim 2, characterized in that: A predetermined interval (200) is maintained between the vibrating tongue (6) and the guide groove (5), and the interval (200) is communicated with a notch opened on one side of the inner groove conserving groove (41).

5. A paint roller scraping mechanism according to claim 2, characterized in that: The apex of the vibration tongue (6) is close to the surface of the supply roller (1).

6. A paint roller scraping mechanism according to claim 1, characterized in that: A threaded tube (7) is provided inside the scraping blade (31), and an inlet of the threaded tube (7) is connected to the secondary coating material retaining chamber (100).

7. A paint roller scraping mechanism according to claim 1, characterized in that: The elastic glass slide (4) is an elastic polyethylene plate.

8. A paint roller scraping mechanism according to claim 2, characterized in that: The vibration tongue (6) is a copper alloy thin sheet, and the vertex is a triangular structure.

9. A printing press, characterized in that: The paint roller scraping mechanism comprises the paint roller scraping mechanism according to any one of claims 1 to 8.

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