Anti-bouncing device for scraper of photogravure press

Abstract

The utility model discloses an anti-bouncing device for a scraper of a photogravure press, relates to the technical field of presses, aims to solve the technical problem that the scraper bounces in the working process due to the fact that the pressure of the scraper is too large or too small when the scraper is supported by a spring, and comprises an ink scraping mechanism arranged on the inner side of a press main body, the side end of the ink scraping mechanism is attached to the outer wall of a printing roller in the printing machine body, the ink scraping mechanism comprises a base, and a scraper attached to the outer wall of the printing roller of the printing machine body is movably installed in the base. The side end of the scraper can be attached to the outer wall of a printing roller in the printing machine body through supporting of the spring, the shrinkage width of the spring can be controlled through cooperation of the movable plate, the threaded rod and the adjusting assembly, and therefore the pressure applied to the scraper by the spring can be adjusted, and the pressure applied to supporting of the scraper by the spring can be adjusted; and the scrapers are not easy to jump.

Description

Technical Field

[0001] The utility model relates to the technical field of printing machines, and more particularly to a scraper anti-jump device for a gravure printing machine. Background Art

[0002] A gravure printing press is a device that uses an intaglio plate for printing. The principle of gravure printing is that the image area on the surface of a plate cylinder (gravure) is lower than the blank area. The image area is composed of ink holes (or cells) of varying sizes. During the printing process, the plate cylinder first rolls in an ink tank, filling the ink holes. Then, a scraper removes the ink from the blank area of ​​the plate cylinder's surface, leaving only the image area. When the plate cylinder contacts the substrate (such as paper or plastic film) and rotates under a certain pressure, the ink in the image area is transferred to the substrate, completing the printing.

[0003] Existing gravure printing machines are usually equipped with a scraper structure on the outside of the printing roller. The scraper structure is fitted with the surface of the printing roller to scrape off excess ink and maintain the beauty of the printing. However, the interior of the existing scraper mechanism is usually supported by a spring structure. When the spring exerts too much pressure on the scraper, the scraper will over-squeeze the ink, resulting in an increase in the ink reaction force and the scraper is prone to jumping. If the pressure is too low, the scraper cannot effectively scrape off excess ink on the printing roller, and ink accumulation may occur, which in turn affects the normal operation of the scraper and causes the scraper to jump, affecting the printing effect. In view of this, we propose an anti-jump device for the scraper of a gravure printing machine. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the existing technology, meet the actual needs, and provide a gravure printing machine scraper anti-jump device to solve the current scraper through the spring support pressure is too large or too small, resulting in the technical problem of scraper jumping during work.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a device for preventing the scraper from jumping of a gravure printing machine, comprising a scraping mechanism installed inside a main body of the printing machine, wherein the side end of the scraping mechanism is in contact with the outer wall of the printing roller inside the main body of the printing machine;

[0006] The ink scraping mechanism includes a base, wherein a scraper is movably mounted inside the base and is in contact with the outer wall of the printing roller of the printing machine body;

[0007] The base includes a hollow box, and a movable plate is movably installed inside the hollow box. Several springs are fixedly provided on one side of the movable plate close to the scraper. The other ends of the several springs are fixedly connected to limit plates fixedly combined with the scraper. Several threaded rods passing through the side wall of the hollow box are fixedly provided on the other side of the movable plate. An adjustment component threadedly connected to the threaded rod is fixedly installed on one side of the hollow box principle scraper.

[0008] The utility model can make the side end of the scraper fit with the outer wall of the printing roller inside the printing machine body through the support of the spring. The cooperation of the movable plate, the threaded rod and the adjustment component can control the contraction width of the spring, thereby adjusting the pressure applied by the spring to the scraper, thereby reducing the problem of excessive or insufficient pressure exerted by the spring on the scraper. In this way, the probability of the scraper jumping during the operation of the printing machine body can be reduced, and a good ink scraping effect can be maintained.

[0009] Preferably, the adjustment assembly includes several fixed sleeves fixed on the outer wall of the hollow box, a bearing located on the outside of the threaded rod is fixed on the inner wall of the fixed sleeve, a threaded tube threadedly connected to the threaded rod is fixed on the inner wall of the bearing, a pulley is fixed on the other end of the threaded tube, and a belt is movably connected between the several pulleys.

[0010] Preferably, a positioning gear is fixedly provided on the outer wall of the threaded tube, a positioning plug-in penetrating the side wall of the fixing sleeve is movably mounted on the outer wall of the fixing sleeve, and the positioning gear and the positioning plug-in are meshedly connected.

[0011] Preferably, the positioning plug-in comprises an inserting plate penetrating the fixing sleeve, a positioning block is fixedly provided at the lower end of the inserting plate, and a tooth groove meshing with the positioning gear is provided at the bottom of the positioning block.

[0012] Preferably, an elastic band connected to the outer wall of the plugging plate is fixedly provided on the outer wall of the fixing sleeve, and the elastic band is made of rubber.

[0013] Preferably, both end side surfaces of the limiting plate are constructed with flexible corrugated strips, and both inner walls of the hollow box facing each other are provided with resistance grooves that are engaged with the corrugated strips.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model can make the side end of the scraper fit with the outer wall of the printing roller inside the printing machine body through the support of the spring. The cooperation of the movable plate, the threaded rod and the adjustment component can control the contraction width of the spring, thereby adjusting the pressure applied by the spring on the scraper. This can reduce the problem of excessive or insufficient pressure exerted by the spring on the scraper, thereby reducing the probability of the scraper jumping during the operation of the printing machine body and maintaining a good ink scraping effect.

[0016] 2. The present invention can also limit the structure of the adjustment component through the cooperation of the positioning gear and the positioning plug-in, so that the adjustment component can maintain a stable position during the printing operation, and it is not easy for the threaded tube structure on the adjustment component to deflect due to vibration generated by the structural work of the printing machine body, thereby further enhancing the stability of the scraper position support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0019] Figure 3 This is a structural diagram of the ink scraping mechanism in the utility model;

[0020] Figure 4 for Figure 3 A schematic diagram of the structure of part A;

[0021] Figure 5 This is a schematic diagram of the cross-section structure of the ink scraping mechanism in the present invention;

[0022] Figure 6 for Figure 5 A schematic diagram of the structure of part B in the middle;

[0023] Figure 7 for Figure 4 Explosion diagram of the middle part of the structure;

[0024] Figure 8 for Figure 5 Schematic diagram of the enlarged structure of part C.

[0025] Explanation of the numbers in the figure: 1. Printing machine body; 2. Ink scraping mechanism; 3. Base; 301. Hollow box; 302. Movable plate; 303. Spring; 304. Limiting plate; 305. Threaded rod; 306. Wave strip; 307. Resistance groove; 4. Scraper; 5. Adjustment assembly; 501. Fixed sleeve; 502. Bearing; 503. Threaded tube; 504. Pulley; 505. Belt; 6. Positioning gear; 7. Positioning plug-in; 701. Insert plate; 702. Positioning block; 703. Elastic belt. DETAILED DESCRIPTION

[0026] like Figures 1 to 8 As shown, the utility model relates to a gravure printing machine scraper anti-jump device, including an ink scraping mechanism 2 installed on the inner side of the printing machine body 1, and the side end of the ink scraping mechanism 2 is in contact with the outer wall of the printing roller inside the printing machine body 1; the ink scraping mechanism 2 is arranged on the outer side of the printing roller inside the printing machine body 1 to scrape off excess ink and maintain printing uniformity.

[0027] The ink scraping mechanism 2 includes a base 3, inside which is movably mounted a scraper 4 that fits against the outer wall of the printing roller of the printer body 1. The base 3 includes a hollow box 301, inside which is movably mounted a movable plate 302. A plurality of springs 303 are fixedly mounted on the side of the movable plate 302 near the scraper 4. The other ends of the plurality of springs 303 are fixedly connected to a limit plate 304 fixedly coupled to the scraper 4. A plurality of threaded rods 305 that pass through the side wall of the hollow box 301 are fixedly mounted on the other side of the movable plate 302. An adjustment assembly 5 that is threadedly connected to the threaded rod 305 is fixedly mounted on one side of the hollow box 301 near the scraper 4. Through the hollow box 30 The internal spring 303 structure cooperates with the limiting plate 304 to provide elastic support for the scraper 4, allowing the scraper 4 to be displaced and adjusted in position. The threaded rod 305 provided on the side of the movable plate 302 cooperates with the adjustment assembly 5 to adjust the tension of the spring 303 so that the pressure on the scraper 4 can be adjusted to a balanced state. This can reduce the influence of the spring 303 on the position of the scraper 4 during operation of the printing press body 1, reduce the probability of the scraper 4 jumping, and ensure that the position between the scraper 4 and the printing roller remains stable.

[0028] In an embodiment of the present utility model, the adjustment component 5 includes several fixed sleeves 501 fixed on the outer wall of the hollow box 301, and a bearing 502 located on the outside of the threaded rod 305 is fixed on the inner wall of the fixed sleeve 501, and a threaded tube 503 threadedly connected to the threaded rod 305 is fixed on the inner wall of the bearing 502. A pulley 504 is fixed on the other end of the threaded tube 503, and a belt 505 is movably connected between the pulleys 504; the setting of the bearing 502 facilitates the rotation of the threaded tube 503, and the cooperation of the pulley 504 and the belt 505 can drive multiple threaded tubes 503 to rotate at the same time, thereby achieving the effect of pushing the movable plate 302 to move smoothly, and the operation is convenient, and a handle is provided on the side end of the pulley 504 located on the side to facilitate the rotation operation.

[0029] In an embodiment of the present utility model, a positioning gear 6 is fixedly provided on the outer wall of the threaded tube 503, and a positioning plug-in 7 is movably installed on the outer wall of the fixed sleeve 501 and penetrates the side wall of the fixed sleeve 501, and the positioning gear 6 and the positioning plug-in 7 are meshed and connected; the structure on which the positioning gear 6 and the positioning plug-in 7 are installed is located on the outside of the adjustment component 5 on which the handle is installed, so that the positioning gear 6 and the positioning plug-in 7 can cooperate with each other to limit the adjustment component 5, so that the adjustment component 5 can maintain a fixed position after the adjustment operation, so that the position of the movable plate 302 squeezing the spring 303 can be kept fixed.

[0030] In an embodiment of the present utility model, the positioning plug-in 7 includes an insert plate 701 that passes through the fixed sleeve 501, and a positioning block 702 is fixedly provided at the lower end of the insert plate 701, and a tooth groove that engages with the positioning gear 6 is provided at the bottom of the positioning block 702; by moving the insert plate 701 up and down, it can be conveniently combined with or separated from the positioning gear 6 to achieve the effect of limiting or releasing the limit.

[0031] In an embodiment of the present invention, an elastic band 703 connected to the outer wall of the plug board 701 is fixed on the outer wall of the fixing sleeve 501, and the material of the elastic band 703 is rubber; the setting of the elastic band 703 can increase the resistance of the plug board 701 to move upward, so that the plug board 701 can automatically reset after moving upward and maintain a stable position when not in use.

[0032] In an embodiment of the present invention, flexible wave strips 306 are constructed on both end sides of the limiting plate 304, and resistance grooves 307 that are engaged with the wave strips 306 are provided on the inner walls of the hollow box 301 and the opposite sides; by engaging the wave strips 306 into the resistance grooves 307, a certain resistance can be added to the backward movement of the scraper 4, and the resistance of the combination of the wave strips 306 and the resistance grooves 307 is less than the elastic force of the spring 303, so that when the scraper 4 moves backward, it can also be automatically reset by the support of the spring 303.

[0033] Working principle: This embodiment provides an anti-jump device for the scraper of a gravure printing machine. When in use, the ink scraping mechanism 2 is first installed at a position close to the printing roller inside the printing machine body 1, so that the side end of the scraper 4 is in contact with the outer wall of the printing roller, and then the pressure of the spring 303 supporting the scraper 4 is adjusted according to the needs of use. By rotating the adjustment component 5 with a handle on one side, the movable plate 302 can be moved synchronously with the movement of the hollow box 301, so that the movable plate 302 and the limit plate 304 cooperate to squeeze the spring 303 to contract, thereby adjusting the tension of the spring 303 to achieve a suitable pressure effect of supporting the scraper 4. In this way, the jumping of the scraper 4 can be reduced during the operation of the printing machine body 1, the stability of the position can be improved, the ink on the scraped printing roller can be kept uniform, and a good printing effect can be maintained. The outer wall of the adjustment component 5 with a handle is installed. A positioning structure that cooperates with a positioning gear 6 and a positioning plug-in 7 is installed on it. In this way, before rotating the adjusting component 5, the positioning plug-in 7 needs to be pulled up to remove the restriction of the adjusting component 5 and achieve a rotatable effect. After the rotation operation of the adjusting component 5 is completed, the positioning plug-in 7 can be put down so that the positioning block 702 at the bottom of the positioning plug-in 7 is stuck to the outside of the positioning gear 6, so that the position of the adjusting component 5 can be fixed. In this way, the influence of mechanical vibration on the position of the adjusting component 5 can be reduced during operation, and the stability of the limit can be maintained. The wavy strips 306 set on both sides of the limit plate 304 are combined with the resistance groove 307 on the inner wall of the hollow box 301 to further improve the limit of the scraper 4 position, so that the scraper 4 adds a certain resistance when it needs to move backward, further strengthening the fit with the surface of the printing roller and not easy to move.

[0034] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A device for preventing scraper jump of a gravure printing machine, characterized in that: The invention comprises an ink scraping mechanism (2) installed inside a printing machine body (1), wherein the side end of the ink scraping mechanism (2) is in contact with the outer wall of a printing roller inside the printing machine body (1); The ink scraping mechanism (2) comprises a base (3), wherein a scraper (4) is movably mounted inside the base (3) and is in contact with the outer wall of the printing roller of the printing machine body (1); The base (3) comprises a hollow box (301), a movable plate (302) is movably installed inside the hollow box (301), a plurality of springs (303) are fixedly installed on a side of the movable plate (302) close to the scraper (4), the other ends of the plurality of springs (303) are fixedly connected to a limit plate (304) fixedly combined with the scraper (4), a plurality of threaded rods (305) penetrating the side wall of the hollow box (301) are fixedly installed on the other side of the movable plate (302), and an adjustment component (5) threadedly connected to the threaded rod (305) is fixedly installed on one side of the hollow box (301) near the scraper (4).

2. The anti-jump device for scraper of gravure printing machine according to claim 1, characterized in that: The adjustment assembly (5) comprises a plurality of fixed sleeves (501) fixed on the outer wall of the hollow box (301); a bearing (502) located outside the threaded rod (305) is fixed on the inner wall of the fixed sleeve (501); a threaded tube (503) threadedly connected to the threaded rod (305) is fixed on the inner wall of the bearing (502); a pulley (504) is fixed on the other end of the threaded tube (503); and a belt (505) is movably connected between the plurality of pulleys (504).

3. The anti-jump device for scraper of gravure printing machine according to claim 2, characterized in that: A positioning gear (6) is fixedly provided on the outer wall of the threaded tube (503), and a positioning plug-in (7) penetrating the side wall of the fixing sleeve (501) is movably installed on the outer wall of the fixing sleeve (501), and the positioning gear (6) and the positioning plug-in (7) are meshedly connected.

4. The anti-jump device for scraper of gravure printing machine according to claim 3, characterized in that: The positioning plug-in unit (7) comprises an inserting plate (701) penetrating the fixing sleeve (501), a positioning block (702) being fixedly provided at the lower end of the inserting plate (701), and a tooth groove engaging with the positioning gear (6) being provided at the bottom of the positioning block (702).

5. The anti-jump device for scraper of gravure printing machine according to claim 4, characterized in that: An elastic band (703) connected to the outer wall of the inserting plate (701) is fixedly provided on the outer wall of the fixing sleeve (501), and the elastic band (703) is made of rubber.

6. The anti-jump device for scraper of gravure printing machine according to claim 1, characterized in that: Both end sides of the limiting plate (304) are constructed with flexible corrugated strips (306), and the inner walls of the hollow box (301) and the two opposite sides are provided with resistance grooves (307) that are engaged with the corrugated strips (306).

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