Spot color ink concentration control device for package printing

Abstract

The invention discloses a spot color ink concentration control device for package printing, and relates to the technical field of package printing. The device comprises a bottom plate, one side of the top of the bottom plate is fixedly connected with a blending mechanism, and one side of the top of the bottom plate is fixedly connected with a mixing mechanism. The precision and efficiency of ink blending are greatly improved through the blending mechanism, the three storage tanks can store different basic ink or additives correspondingly and are convenient to take and use according to needs, a first pump body is matched with a high-pressure spray head, cleaning liquid can be sprayed into the storage tanks in a high-pressure mode through a first conveying pipe and a second conveying pipe, and the cleaning liquid is sprayed into the storage tanks in a high-pressure mode. The second pump body is connected with the storage tank through the connecting pipe, raw materials can be accurately conveyed to the filtering assembly through the third conveying pipe, the whole blending process is accurate and controllable, manual blending errors are greatly reduced, and the consistency of the concentration of all batches of printing ink is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging printing, and particularly relates to a device for controlling the concentration of spot color ink for packaging printing. Background Art

[0002] As the "silent salesman" of products, the printing quality and visual effect of packaging play a crucial role in product sales and brand promotion. Spot color ink occupies a key position in this field. With its ability to present unique and vivid colors that cannot be achieved by standard four-color printing, it has become the first choice for many well-known brands to create unique packaging images. For example, in high-end cosmetic packaging, the luxurious texture created by spot color ink; on electronic product packaging, the technological and fashionable sense shown by spot color ink have effectively enhanced the added value and market competitiveness of products. However, there are significant shortcomings in the current spot color ink concentration control technology, seriously restricting the development of the industry.

[0003] In the traditional spot color ink blending process, it mostly relies on manual experience. Workers make subjective judgments and manually add different raw materials according to color cards, resulting in low blending efficiency and poor accuracy. Due to different workers' different perceptions of colors, even the same worker is difficult to ensure the consistency of the ink concentration in each batch after long-term work due to visual fatigue. This concentration deviation caused by manual blending makes the colors of printed products uneven, thus reducing the product quality. When conventional filtering equipment filters ink, impurities are easy to block the filter screen, not only reducing the filtering efficiency, but also requiring frequent shutdowns for cleaning, affecting production continuity. Moreover, the traditional filtering method cannot effectively remove fine particles, and these residual impurities will cause problems such as nozzle blockage and defects in printed products in subsequent printing, increasing the waste rate and production cost.

[0004] Therefore, we provide a device for controlling the concentration of spot color ink for packaging printing to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for controlling the concentration of spot color ink for packaging printing. Through the cooperation of a blending mechanism, a mixing mechanism, and a filtering component, it solves the problems in the prior art that the spot color ink blending process mostly relies on manual experience, with low blending efficiency and poor accuracy, and at the same time, when conventional filtering equipment filters ink, impurities are easy to block the filter screen, reducing the filtering efficiency.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions.

[0007] The present invention relates to a device for controlling the concentration of spot color ink used in packaging printing, which includes a bottom plate. On one side of the top of the bottom plate, a dispensing mechanism is fixedly connected. On one side of the top of the bottom plate, a mixing mechanism is fixedly connected. On the top of the mixing mechanism, a filtering component is fixedly connected. The dispensing mechanism includes a housing, the bottom of the housing is fixedly connected to the bottom plate, and inside the housing, three storage tanks are fixedly connected. At the front end of the housing, a first pump body is fixedly connected. One side of the first pump body is communicated with a first delivery pipe, and the top of the first pump body is communicated with a second delivery pipe. The bottom of the second delivery pipe is communicated with a high-pressure nozzle, and the bottom of the high-pressure nozzle is communicated with the storage tank. One side of the storage tank is communicated with a second pump body through a connecting pipe, and the top of the second pump body is communicated with a third delivery pipe. The surface of the storage tank is communicated with a feeding pipe, and a valve is arranged at the top of the feeding pipe. On the surface of the housing, a transparent scale plate is fixedly connected, and the transparent scale plate corresponds to the storage tank.

[0008] The present invention is further provided that the filtering component includes a filtering chamber, which is arranged above the mixing mechanism. Inside the filtering chamber, a filter plate is fixedly connected. On the top of the filtering chamber, a cover plate is fixedly connected. On the top of the cover plate, a first motor is fixedly connected. The output end of the first motor is fixedly connected with a rotating rod, and the bottom of the rotating rod penetrates below the cover plate and is fixedly connected with a housing. Inside the housing, a second motor is fixedly connected. The output end of the second motor is fixedly connected with a threaded rod, and the bottom of the threaded rod is threadedly connected with a threaded pipe. The bottom of the threaded pipe is fixedly connected with a mounting seat, and on one side of the mounting seat, four scraping plates are fixedly connected. The bottoms of the scraping plates are in contact with the filter plate, and the bottom of the filtering chamber is communicated with a discharge pipe.

[0009] The present invention is further provided that the mixing mechanism includes a mixing chamber, the top of the mixing chamber is communicated with the discharge pipe. The bottom of the housing is fixedly connected with a stirring shaft, and the bottom of the stirring shaft penetrates inside the filtering chamber and extends into the inside of the mixing chamber. On the surface of the stirring shaft, stirring rods are fixedly connected. On the inner wall of the mixing chamber, a guide plate is fixedly connected.

[0010] The present invention is further provided that on the top and bottom of the surface of the stirring shaft, connecting frames are fixedly connected, and on one side of each connecting frame, a rotating frame is fixedly connected.

[0011] The present invention is further provided that the bottom of the mixing chamber is communicated with a heating chamber, one side of the heating chamber is communicated with a discharge pipe, and a first control valve is arranged at the top of the discharge pipe.

[0012] The present invention is further provided that one side of the filtering chamber is communicated with a cleaning pipe, and a second control valve is arranged on the surface of the cleaning pipe.

[0013] The present invention is further configured such that a support column is fixedly connected to one side of the top of the base plate, a fixing plate is fixedly connected to the top of the support column, and the top of the fixing plate is fixedly connected to the heating chamber.

[0014] The present invention is further configured such that a first connecting ear is fixedly connected to the surface of the cover plate, and a second connecting ear adapted to the first connecting ear is fixedly connected to the surface of the filtering chamber.

[0015] The present invention is further configured such that a support frame is fixedly connected to the top of the mixing chamber, and the top of the support frame is fixedly connected to the filtering chamber.

[0016] The present invention is further configured such that a connector is communicated with one side of the top of the cover plate, and one side of the connector is communicated with the third delivery pipe through a hose.

[0017] The present invention has the following beneficial effects.

[0018] 1. The present invention greatly improves the accuracy and efficiency of ink blending through the blending mechanism. The three storage tanks can store different base inks or additives respectively, which is convenient for taking according to needs. The first pump body and the high-pressure nozzle cooperate to spray the cleaning liquid into the storage tank in a high-pressure form by using the first delivery pipe and the second delivery pipe, so as to realize the efficient flushing of the storage tank and ensure that there are no residual impurities in the tank, laying a foundation for accurate blending. The second pump body is connected to the storage tank through a connecting pipe, and can accurately transport the raw materials to the filtering component through the third delivery pipe. The whole blending process is accurately controllable, greatly reducing the manual blending error, ensuring the consistency of the ink concentration of each batch, and improving the stability of the printing quality of the product.

[0019] 2. The filter plate in the filtering chamber of the present invention can effectively intercept impurities in the ink. The first motor drives the rotating rod and the lower shell to rotate, so that the stirring shaft rotates synchronously, assisting the filtering process while mixing the ink. The second motor drives the threaded rod to rotate, and the threaded tube threaded with the threaded rod drives the mounting seat and the scraping plate to move up and down. The four scraping plates are closely attached to the filter plate, and can timely clean the impurities accumulated on the surface of the filter plate, avoiding the blockage of the filter screen, continuously maintaining a good filtering effect, improving the filtering efficiency, ensuring the purity of the ink, reducing printing failures caused by impurities, and reducing the waste rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below.

[0021] Figure 1 It is a three-dimensional view of a spot color ink concentration control device for packaging printing.

[0022] Figure 2 It is a side three-dimensional view of a spot color ink concentration control device for packaging printing.

[0023] Figure 3 It is a rear three-dimensional view of a spot color ink concentration control device for packaging printing.

[0024] Figure 4 It is a bottom-up three-dimensional view of the filter bin in a spot color ink concentration control device for packaging printing.

[0025] Figure 5 It is a three-dimensional view of the mixing bin in a spot color ink concentration control device for packaging printing.

[0026] Figure 6 It is a three-dimensional view of the filter bin in a spot color ink concentration control device for packaging printing.

[0027] Figure 7 It is a three-dimensional view of the second motor and its connection structure in a spot color ink concentration control device for packaging printing.

[0028] Figure 8 It is a three-dimensional view of the mixing mechanism in a spot color ink concentration control device for packaging printing.

[0029] In the drawings: 1, bottom plate; 2, dispensing mechanism; 201, outer shell; 202, storage tank; 203, first pump body; 204, first delivery pipe; 205, second delivery pipe; 206, high-pressure nozzle; 207, second pump body; 208, third delivery pipe; 209, feed pipe; 210, valve; 211, transparent scale plate; 3, mixing mechanism; 301, mixing bin; 302, stirring shaft; 303, stirring rod; 304, guide plate; 4, filter assembly; 401, filter bin; 402, filter plate; 403, cover plate; 404, first motor; 405, rotating rod; 406, housing; 407, second motor; 408, threaded rod; 409, threaded pipe; 410, mounting seat; 411, scraper; 412, discharge pipe; 5, connecting frame; 6, rotating frame; 7, heating bin; 8, discharge pipe; 9, cleaning pipe; 10, support column; 11, fixing plate; 12, first connecting ear; 13, second connecting ear; 14, support frame; 15, connecting head. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be described in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Embodiment 1

[0032] Please refer to Figures 1-8, the present invention is a special color ink concentration control device for packaging printing, including a bottom plate 1. On one side of the top of the bottom plate 1, a dispensing mechanism 2 is fixedly connected. On one side of the top of the bottom plate 1, a mixing mechanism 3 is fixedly connected. On the top of the mixing mechanism 3, a filtering component 4 is fixedly connected. The dispensing mechanism 2 includes a housing 201. The bottom of the housing 201 is fixedly connected to the bottom plate 1. Inside the housing 201, a storage tank 202 is fixedly connected. The number of storage tanks 202 is three. At the front end of the housing 201, a first pump body 203 is fixedly connected. On one side of the first pump body 203, a first delivery pipe 204 is connected. On the top of the first pump body 203, a second delivery pipe 205 is connected. At the bottom of the second delivery pipe 205, a high-pressure spray head 206 is connected. The bottom of the high-pressure spray head 206 is connected to the storage tank 202. One side of the storage tank 202 is connected to a second pump body 207 through a connecting pipe. On the top of the second pump body 207, a third delivery pipe 208 is connected. On the surface of the storage tank 202, a feeding pipe 209 is connected. At the top of the feeding pipe 209, a valve 210 is provided. On the surface of the housing 201, a transparent scale plate 211 is fixedly connected. The transparent scale plate 211 corresponds to the storage tank 202.

[0033] Specifically: The three storage tanks 202 are all made of stainless steel, which has better compatibility with various inks, will not chemically react with the inks, and can ensure the ink quality. At the connection between the top of the storage tank 202 and the high-pressure spray head 206, a sealing cover is provided and sealed with a rubber sealing ring to ensure that during the ink storage process, the ink will not be oxidized or deteriorated due to the entry of external air. The bottom of the storage tank 202 is conical, which is convenient for the ink to flow concentratedly towards the connecting pipe under the action of gravity, improving the conveying efficiency. The high-pressure spray head 206 can spray the cleaning liquid into the storage tank 202 in the form of high-pressure and uniform mist, effectively flushing the residual ink and impurities in the tank. The high-pressure spray head 206 is tightly connected to the second delivery pipe 205 through a threaded connection to ensure firm connection and will not fall off during the high-pressure flushing process. At the top of the feeding pipe 209, a valve 210 is provided. The valve 210 is a manual ball valve, and the diameter of the valve 210 matches the inner diameter of the feeding pipe 209. The operation is simple, and it can conveniently control the supply of ink raw materials. The transparent scale plate 211 is made of acrylic material, which is convenient for the operator to directly observe the remaining amount of ink in the storage tank 202, so as to accurately control the ink addition amount.

[0034] Embodiment Two

[0035] Please refer to Figures 1-8, on the basis of the first embodiment, the filtering component 4 includes a filtering bin 401, the filtering bin 401 is arranged above the mixing mechanism 3, a filter plate 402 is fixedly connected to the inner cavity of the filtering bin 401, a cover plate 403 is fixedly connected to the top of the filtering bin 401, a first motor 404 is fixedly connected to the top of the cover plate 403, a rotating rod 405 is fixedly connected to the output end of the first motor 404, the bottom of the rotating rod 405 penetrates below the cover plate 403 and is fixedly connected to a housing 406, a second motor 407 is fixedly connected to the inner cavity of the housing 406, a threaded rod 408 is fixedly connected to the output end of the second motor 407, a threaded tube 409 is threadedly connected to the bottom of the threaded rod 408, a mounting seat 410 is fixedly connected to the bottom of the threaded tube 409, a scraping plate 411 is fixedly connected to one side of the mounting seat 410, the number of the scraping plates 411 is four, the bottom of the scraping plate 411 contacts the filter plate 402, and a discharge pipe 412 is communicated with the bottom of the filtering bin 401.

[0036] Specifically: The filtering bin 401 is arranged above the mixing mechanism 3, which is convenient for the ink to flow into the subsequent mixing process by gravity. The filter plate 402 fixedly arranged in the inner cavity of the filtering bin 401 is made of a stainless steel filter mesh, and the mesh holes can effectively intercept particulate impurities, gels, etc. in the ink, ensuring the purity of the ink entering the mixing bin 301. The first motor 404 on the top of the cover plate 403 drives the rotating rod 405 and the housing 406 below to rotate, so that the stirring shaft 302 rotates synchronously. While assisting in mixing the ink, it promotes the flow of the ink on the surface of the filter plate 402 and improves the filtering efficiency. The second motor 407 drives the threaded rod 408 to rotate, and the threaded tube 409 threadedly connected to the threaded rod 408 drives the mounting seat 410 and the four scraping plates 411 to move up and down. The bottom of the scraping plate 411 is closely attached to the filter plate 402, which can timely clean the impurities accumulated on the surface of the filter plate 402, prevent the filter mesh from being blocked, and continuously maintain a good filtering effect.

[0037] Embodiment Three

[0038] Please refer to Figures 1-8 , on the basis of the first embodiment, the mixing mechanism 3 includes a mixing bin 301, the top of the mixing bin 301 is communicated with the discharge pipe 412, a stirring shaft 302 is fixedly connected to the bottom of the housing 406, the bottom of the stirring shaft 302 penetrates the inner cavity of the filtering bin 401 and extends into the inner cavity of the mixing bin 301, stirring rods 303 are fixedly connected to the surface of the stirring shaft 302, a guide plate 304 is fixedly connected to the inner wall of the mixing bin 301, and connecting frames 5 are fixedly connected to both the top and the bottom of the surface of the stirring shaft 302, and a rotating frame 6 is fixedly connected to one side of the connecting frame 5.

[0039] Specifically: The top of the mixing bin 301 is connected to the discharge pipe 412 at the bottom of the filtering bin 401, enabling the filtered ink to smoothly flow into the mixing bin 301. The stirring rods 303 fixed on the surface of the stirring shaft 302 rotate driven by the first motor 404 to strongly stir the ink. The stirring rods 303 can generate a strong turbulent flow effect during the stirring process, enabling the components of the ink to be fully mixed. The guide plates 304 fixed on the inner wall of the mixing bin 301 are designed in terms of shape and installation angle according to the principles of fluid mechanics, capable of guiding the flow direction of the ink, optimizing the mixing path, avoiding local dead corners during the mixing process of the ink, and ensuring the uniform dispersion of pigments, additives, etc. The connecting frames 5 fixed at the top and bottom of the surface of the stirring shaft 302, and the rotating frames 6 connected to one side of the connecting frames 5 further enhance the turbulent flow effect during the stirring process. When the stirring shaft 302 rotates, the rotating frames 6 rotate accordingly, forming complex flow trajectories in the ink, promoting the full exchange of the ink in different regions, and making the mixing more uniform. It is especially suitable for spot-color inks with extremely high requirements for mixing uniformity, capable of effectively avoiding the agglomeration of ink particles and improving the stability and printing adaptability of the ink.

[0040] Embodiment 4

[0041] Please refer to Figures 1-8 , on the basis of Embodiment 1, the bottom of the mixing bin 301 is connected to a heating bin 7, one side of the heating bin 7 is connected to a discharge pipe 8, a first control valve is arranged at the top of the discharge pipe 8, one side of the filtering bin 401 is connected to a cleaning pipe 9, and a second control valve is arranged on the surface of the cleaning pipe 9. One side of the top of the bottom plate 1 is fixedly connected to a support column 10, the top of the support column 10 is fixedly connected to a fixing plate 11, and the top of the fixing plate 11 is fixedly connected to the heating bin 7. The surface of the cover plate 403 is fixedly connected to a first connecting ear 12, and the surface of the filtering bin 401 is fixedly connected to a second connecting ear 13 adapted to the first connecting ear 12. The top of the mixing bin 301 is fixedly connected to a support frame 14, and the top of the support frame 14 is fixedly connected to the filtering bin 401. One side of the top of the cover plate 403 is connected to a connecting head 15, and one side of the connecting head 15 is connected to the third delivery pipe 208 through a hose.

[0042] Specifically: The heating chamber 7 adopts an electric heating method and is internally provided with a temperature sensor. It can accurately control the ink temperature according to the characteristics of spot color ink. Appropriate heating can reduce the viscosity of the ink and improve the fluidity of the ink, making it easier to pass through the nozzle or printing plate cylinder during the printing process, thereby improving the printing quality and efficiency. The support columns 10 can stably support the upper fixed plate 11 and the heating chamber 7. The fixed plate 11 is connected to the support columns 10 and the heating chamber 7 by welding, ensuring that the heating chamber 7 will not displace or shake during operation. The first connecting ear 12 on the surface of the cover plate 403 and the second connecting ear 13 on the surface of the filter chamber 401 that matches it provide great convenience for equipment maintenance. When it is necessary to repair the inside of the filter chamber 401, the maintenance personnel only need to loosen the bolts or pins connecting the first connecting ear 12 and the second connecting ear 13, and then they can easily disassemble the cover plate 403 without removing other complex components, shortening the equipment downtime and improving the usability of the equipment. The support frame 14 adopts a trapezoidal support structure, which has good support strength and stability. The top of the support frame 14 is fixedly connected to the filter chamber 401, which can effectively share the weight of the filter chamber 401 and the mixing chamber 301, enhancing the structural stability of the entire device. The connector 15 is connected to the third delivery pipe 208 through a hose, providing a channel for the ink to be transported from the dispensing mechanism 2 to the filter assembly 4. The hose has a certain flexibility and can be bent reasonably according to the internal layout of the device to adapt to the small vibrations and displacements during the operation of the equipment, ensuring that the ink transportation process is not affected.

[0043] The working principle of the present invention is as follows: When it is necessary to clean the storage tank 202, the first pump body 203 is started. The first pump body 203 sucks in the external cleaning liquid through the first delivery pipe 204, and then transports the cleaning liquid to the high-pressure nozzle 206 through the second delivery pipe 205. The high-pressure nozzle 206 sprays the cleaning liquid into the storage tank 202 in a high-pressure and uniform mist form. The high-pressure mist-like cleaning liquid can comprehensively and efficiently wash the residual ink and impurities in the tank, ensuring the cleanliness of the storage tank 202 and creating good conditions for accurately dispensing ink next time. The operator adds ink raw materials to the storage tank 202 through the feed pipe 209. After the addition is completed, the second pump body 207 is started. The second pump body 207 transports the ink raw materials in the storage tank 202 to the filter assembly 4 through the third delivery pipe 208. At the same time, the operator can directly observe the remaining ink volume in the tank through the transparent scale plate 211, thereby accurately controlling the ink addition amount and ensuring the accuracy of the dispensing process.

[0044] The mesh size of the filter plate 402 can effectively intercept particulate impurities, gels, etc. in the ink, ensuring that the purity of the ink entering the mixing chamber 301 meets the standard. After the first motor 404 is started, it drives the rotating rod 405 and the lower housing 406 to rotate, and the stirring shaft 302 fixedly connected to the bottom of the housing 406 rotates synchronously. During the rotation of the stirring shaft 302, it can drive the scraper 411 to rotate. On the one hand, it assists in mixing the ink, and on the other hand, it promotes the ink to flow faster on the surface of the filter plate 402, thereby improving the filtration efficiency. When the second motor 407 is started, the second motor 407 drives the threaded rod 408 to rotate, and the threaded rod 408 drives the threaded tube 409 to move up and down. The threaded tube 409 drives the mounting seat 410 and the four scrapers 411 to move up and down. The bottom of the scraper 411 closely adheres to the filter plate 402, which can timely clean the impurities accumulated on the surface of the filter plate 402, prevent the filter screen from being blocked, continuously maintain a good filtration effect, and ensure that the ink stably and efficiently passes through the filter assembly 4 and enters the mixing mechanism 3.

[0045] The mixing chamber 301 is connected to the discharge pipe 412 at the bottom of the filtration chamber 401, and the filtered ink can smoothly flow into the mixing chamber 301. The stirring shaft 302 rotates driven by the first motor 404, and the stirring rods 303 fixed on its surface rotate accordingly, strongly stirring the ink. The stirring rods 303 can generate a strong turbulent flow effect during the stirring process, promoting the full mixing of the components of the ink. The flow guide plates 304 designed and fixed on the inner wall of the mixing chamber 301 according to the principle of fluid mechanics guide the flow direction of the ink during the stirring of the ink, optimize the mixing path, effectively avoid local dead corners during the mixing of the ink, and ensure the uniform dispersion of pigments, additives, etc. When the stirring shaft 302 rotates, the rotating frame 6 rotates accordingly, forming a complex flow trajectory in the ink, promoting the full exchange of the ink in different regions and making the mixing more uniform.

[0046] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the invention to only the specific implementation manners. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention.

Claims

1. A spot color ink concentration control device for packaging printing, comprising a bottom plate (1), characterized in that: A mixing mechanism (2) is fixedly connected to one side of the top of the bottom plate (1), a mixing mechanism (3) is fixedly connected to one side of the top of the bottom plate (1), and a filtering assembly (4) is fixedly connected to the top of the mixing mechanism (3); The mixing mechanism (2) comprises a shell (201), the bottom of the shell (201) is fixedly connected to the bottom plate (1), the inner cavity of the shell (201) is fixedly connected to a storage tank (202), the number of the storage tanks (202) is three, the front end of the shell (201) is fixedly connected to a first pump body (203), one side of the first pump body (203) is connected to a first delivery pipe (204), the top of the first pump body (203) is connected to a second delivery pipe (205), and the bottom of the second delivery pipe (205) is connected to a high-pressure nozzle ( 206), the bottom of the high-pressure nozzle (206) is connected to the storage tank (202), one side of the storage tank (202) is connected to the second pump body (207) through a connecting pipe, the top of the second pump body (207) is connected to the third delivery pipe (208), the surface of the storage tank (202) is connected to the supply pipe (209), the top of the supply pipe (209) is provided with a valve (210), and the surface of the housing (201) is fixedly connected to a transparent scale plate (211), and the transparent scale plate (211) corresponds to the storage tank (202).

2. The spot color ink concentration control device for packaging printing according to claim 1, characterized in that: The filter assembly (4) comprises a filter chamber (401), the filter chamber (401) being arranged above the mixing mechanism (3), the inner cavity of the filter chamber (401) being fixedly connected to a filter plate (402), the top of the filter chamber (401) being fixedly connected to a cover plate (403), the top of the cover plate (403) being fixedly connected to a first motor (404), the output end of the first motor (404) being fixedly connected to a rotating rod (405), the bottom of the rotating rod (405) passing through the bottom of the cover plate (403) and being fixedly connected to a housing (406), the housing ( 406) is fixedly connected to the inner cavity of the second motor (407), the output end of the second motor (407) is fixedly connected to a threaded rod (408), the bottom of the threaded rod (408) is threadedly connected to a threaded tube (409), the bottom of the threaded tube (409) is fixedly connected to a mounting seat (410), one side of the mounting seat (410) is fixedly connected to a scraper (411), the number of the scrapers (411) is four, the bottom of the scraper (411) is in contact with the filter plate (402), and the bottom of the filter bin (401) is connected to a discharge pipe (412).

3. The spot color ink concentration control device for packaging printing according to claim 2, characterized in that: The mixing mechanism (3) comprises a mixing bin (301), the top of the mixing bin (301) is connected to a discharge pipe (412), the bottom of the shell (406) is fixedly connected to a stirring shaft (302), the bottom of the stirring shaft (302) passes through the inner cavity of the filtering bin (401) and extends to the inner cavity of the mixing bin (301), the surface of the stirring shaft (302) is fixedly connected to a stirring rod (303), and the inner wall of the mixing bin (301) is fixedly connected to a guide plate (304).

4. The spot color ink concentration control device for packaging printing according to claim 3, characterized in that: The top and bottom of the surface of the stirring shaft (302) are both fixedly connected to a connecting frame (5), and one side of the connecting frame (5) is fixedly connected to a rotating frame (6).

5. The spot color ink concentration control device for packaging printing according to claim 3, characterized in that: The bottom of the mixing bin (301) is connected to the heating bin (7), one side of the heating bin (7) is connected to a discharge pipe (8), and a first control valve is provided at the top of the discharge pipe (8).

6. The spot color ink concentration control device for packaging printing according to claim 2, characterized in that: One side of the filter bin (401) is connected to a cleaning pipe (9), and a second control valve is provided on the surface of the cleaning pipe (9).

7. The spot color ink concentration control device for packaging printing according to claim 5, characterized in that: A support column (10) is fixedly connected to one side of the top of the base plate (1), a fixed plate (11) is fixedly connected to the top of the support column (10), and the top of the fixed plate (11) is fixedly connected to the heating chamber (7).

8. The spot color ink concentration control device for packaging printing according to claim 2, characterized in that: A first connecting ear (12) is fixedly connected to the surface of the cover plate (403), and a second connecting ear (13) adapted to the first connecting ear (12) is fixedly connected to the surface of the filter bin (401).

9. The spot color ink concentration control device for packaging printing according to claim 3, characterized in that: The top of the mixing bin (301) is fixedly connected to a support frame (14), and the top of the support frame (14) is fixedly connected to the filtering bin (401).

10. The spot color ink concentration control device for packaging printing according to claim 2, characterized in that: One side of the top of the cover plate (403) is connected to a connector (15), and one side of the connector (15) is connected to a third delivery pipe (208) via a hose.

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