A printing apparatus for letterpress printing

Abstract

This utility model discloses a printing device for letter printing, comprising: an ink tank body, inside which a printing roller is installed for printing ink; wherein, the ink tank body is provided with an ink holding tank, and the bottom of the ink tank body is provided with an ink outlet, a return outlet, and an ink inlet, the ink inlet and the return outlet being connected to an ink storage tank via pipelines. This utility model can effectively reduce the volume of ink to be held, thereby reducing the amount of ink used during printing, solving the problem of excessive ink inventory after printing, and effectively reducing production and processing costs; the ink storage tank is equipped with an automatic viscometer for monitoring the viscosity of the ink, which, together with an ink pump, allows the ink to flow in from the ink inlet along the ink inlet pipe and then flow back to the ink storage tank from the return outlet along the return pipe, maintaining the flow of the ink in a cyclical manner, and the viscosity is monitored in real time by the automatic viscometer to ensure the stability of the ink viscosity, thereby improving the quality and consistency of the printed products.

Description

Technical Field

[0001] This utility model relates to the field of ink printing technology, specifically to a printing equipment for letter printing. Background Technology

[0002] Tipping paper is a special packaging paper used in the tobacco industry to wrap cigarette filters and connect them to the cigarette body. It is typically processed with color printing, hot stamping, and embossing to clearly display brand logos, patterns, and text information, enhancing product recognition and aesthetics, while also possessing physical properties suitable for various usage scenarios. Tipping paper is usually printed using gravure printing, a process that gives the printed surface a delicate and beautiful texture, and the post-printing pigments have excellent leveling properties, preventing noticeable brush marks or build-up.

[0003] In the specific printing process, the printing process includes delivering the raw paper roll to the printing roller via guide rollers, rotating the printing plate in the coating ink tray, and scraping off excess coating on the printing plate by a doctor blade. When printing small-area patterns such as letters and lines, the actual amount of ink required is relatively small. However, because the ink tanks commonly used in the industry are designed to accommodate different sizes of printing rollers, ensure long-term continuous printing, and avoid partial exposure of the printing plate leading to drying, their volume is usually designed to be large. Therefore, a large amount of ink needs to be injected into the tank until the ink completely submerges the part of the printing plate that is in contact with the ink in order to meet the needs of normal printing operations and prevent problems such as pattern defects and uneven color. This results in a large amount of ink used, excessive ink inventory that is difficult to manage, and high production and processing costs. Utility Model Content

[0004] The purpose of this utility model is to provide a printing device for letter printing in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The ink tank body has a printing roller inside, which is used for printing ink.

[0007] The ink tank body has an ink placement groove inside, and the outer contour of the ink placement groove is arc-shaped.

[0008] The bottom of the ink tank body is provided with an ink outlet, a return outlet and an ink inlet, and the ink inlet and the return outlet are connected to the ink storage tank through pipelines.

[0009] As a further description of the above technical solution, the printing roller is disposed in the middle of the ink trough.

[0010] As a further description of the above technical solution, the outer contour of the ink reservoir is parallel to the outer contour of the printing roller.

[0011] As a further description of the above technical solution, the ink outlet and the return outlet are located on both sides of the bottom of the ink tank body.

[0012] As a further description of the above technical solution, the ink inlet is located on the side of the ink tank body.

[0013] As a further description of the above technical solution, the ink outlet is provided with a control valve, and the ink outlet switches the ink outlet pipe open and closed through the control valve.

[0014] As a further description of the above technical solution, the ink inlet is connected to the ink storage tank through an ink inlet pipe, and the ink inlet pipe is used to transport ink to the main body of the ink tank.

[0015] As a further description of the above technical solution, the ink inlet pipe is equipped with an ink pump, which is used to pump ink from the ink storage tank into the ink tank body.

[0016] As a further description of the above technical solution, the ink storage tank is equipped with an automatic viscometer, which is used to monitor the viscosity of the ink.

[0017] As a further description of the above technical solution, the reflux port is connected to the ink storage tank through a reflux pipe, and the reflux pipe is used to transport ink to the ink storage tank.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The ink tank used in this utility model has an ink holding trough inside, which can effectively reduce the volume of ink to be held, thereby reducing the amount of ink used during printing, solving the problem of excessive ink inventory after printing, and effectively reducing production and processing costs.

[0020] 2. In this utility model, the ink storage tank is equipped with an automatic viscometer to monitor the viscosity of the ink. In conjunction with the ink pump, the ink can flow in from the ink inlet along the ink inlet pipe and then flow back to the ink storage tank from the return pipe along the return outlet, maintaining the flow state of the ink in a cycle. Furthermore, the viscosity is monitored in real time by the automatic viscometer to ensure the stability of the ink viscosity, thereby improving the quality and consistency of printed products.

[0021] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the letter printing equipment of this utility model;

[0023] Figure 2 yes Figure 1 Top view of the main body of the ink tank;

[0024] Figure 3 yes Figure 2 Enlarged diagram of point AA in the middle.

[0025] Figure label:

[0026] 1. Ink tank body; 2. Printing roller; 3. Ink trough; 4. Ink outlet; 5. Return port; 6. Ink inlet; 7. Ink storage tank; 8. Control valve; 9. Ink inlet pipe; 10. Ink pump; 11. Automatic viscometer; 12. Return pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown, in one embodiment, a printing apparatus for letter printing includes: an ink tank body 1.

[0029] The ink tank body 1 has an ink placement tank 3 inside. The ink placement tank 3 has an inverted U-shaped cross section and an arc-shaped outer contour, which forms a surrounding space for ink to be contained, avoiding dead corners of ink accumulation in the tank. This reduces the resistance of ink flow on the tank wall and ensures smoother ink delivery.

[0030] Specifically, the outer contour of the ink reservoir 3 is parallel to the outer contour of the printing roller 2, ensuring that the contact depth between the printing roller 2 and the ink in the ink reservoir 3 is always consistent during the rotation process, thus avoiding the problem of uneven color depth in the letter printing pattern due to uneven contact.

[0031] The ink tank is equipped with a printing roller 2. The surface of the printing roller 2 is engraved with corresponding intaglio patterns according to the letter printing requirements. When the printing roller 2 rotates, its surface intaglio can accurately absorb the ink in the ink tank 3 and then transfer the ink to the surface of the printing substrate such as cork paper, thereby completing the letter pattern printing operation.

[0032] Specifically, the printing roller 2 is positioned in the middle of the ink tank 3, ensuring that the lower half of the printing roller 2 can be immersed in the ink in the ink tank 3, ensuring that the gravure pattern can fully absorb the ink, and avoiding collision and interference between the upper half of the printing roller 2 and the top of the ink tank body 1. At the same time, the middle position can make the force on the printing roller 2 more balanced when it rotates, reducing the equipment vibration caused by eccentric rotation, and further improving the stability of the printing process.

[0033] Understandably, the ink tank has an internal ink reservoir 3, which, compared to the traditional integrated ink tank, effectively reduces the actual ink holding volume, leaving only the necessary space for the printing roller 2 to absorb ink normally. This directly reduces the amount of ink used, especially for small-area printing scenarios such as letters. It avoids the problem of excessive ink filling caused by the excessive volume of the ink tank in traditional equipment, and solves the problem of excessive residual ink in the ink tank after printing, reducing the difficulty of handling. At the same time, it can also directly reduce the amount of ink purchased, reducing the raw material cost in production and processing.

[0034] Please continue reading. Figures 1-3 In this embodiment, the bottom of the ink tank body 1 is provided with an ink outlet 4 for discharging residual ink in the tank, a return outlet 5 for realizing ink circulation and return, and an ink inlet for replenishing new ink; wherein, the ink inlet 6 and the return outlet 5 are sealed and connected to the external ink storage tank 7 through a special pipeline resistant to ink corrosion, forming an ink circulation supply channel to ensure that the ink can flow stably between the ink storage tank 7 and the ink tank body 1.

[0035] For example, the ink outlet 4 and the return outlet 5 are located on both sides of the bottom of the ink tank body 1, which allows the ink in the tank to flow evenly from both sides during transportation, avoiding ink residue caused by a single-sided opening; correspondingly, the ink inlet 6 is located on the side of the ink tank body 1, which prevents the ink from directly impacting the ink surface in the tank when injected from the bottom, thus preventing the generation of air bubbles (air bubbles can cause problems such as missing prints and false prints during printing), and at the same time allows the newly injected ink to mix more smoothly with the existing ink in the tank, ensuring the consistency of ink concentration and viscosity.

[0036] Specifically, the ink outlet 4 is equipped with a control valve 8, which can be a manual regulating valve or an electric control valve 8. It can achieve precise on / off control and flow regulation according to production needs. The opening and closing of the control valve 8 can directly control the on / off of the ink outlet pipeline, which can quickly cut off the ink outlet channel when the equipment is maintained, the ink is replaced or production is stopped, to avoid ink leakage.

[0037] Furthermore, the ink inlet 6 is connected to the ink storage tank 7 via the ink inlet pipe 9, which stably delivers the ink in the ink storage tank 7 to the ink tank body 1, providing continuous ink supply for the printing operation.

[0038] Specifically, to ensure stable power for ink delivery, an ink pump 10 is also connected in series on the ink inlet pipe 9 (the pump power can be adjusted according to the printing speed to achieve precise control of ink flow). The ink pump 10 can provide stable negative pressure to efficiently pump ink from the ink storage tank 7 into the ink tank body 1, avoiding printing interruptions caused by insufficient ink supply.

[0039] Furthermore, the ink storage tank 7 is equipped with an automatic viscometer 11, which monitors the viscosity changes of the ink in the storage tank in real time through built-in sensors (ink viscosity directly affects the clarity and adhesion of the printed pattern; too high viscosity can easily lead to blurred patterns, while too low viscosity can easily cause ink diffusion). It can provide timely feedback on viscosity data, making it easy for operators to adjust the ink composition or temperature to ensure that the ink viscosity always meets the printing requirements.

[0040] Specifically, the return port 5 is connected to the ink storage tank 7 through the return pipe 12, so that the excess ink in the ink tank body 1 that is not used by the printing roller 2 is transported back to the ink storage tank 7, thereby realizing the recycling of ink.

[0041] Understandably, the ink storage tank 7 is equipped with an automatic viscometer 11 to monitor the viscosity of the ink. In conjunction with the ink pump 10, the ink can flow into the ink storage tank 7 from the ink inlet 6 along the ink inlet pipe 9, and then flow back to the ink storage tank 7 from the return port 5 along the return pipe 12, maintaining the flow of the ink in a cyclical manner. Furthermore, the viscosity is monitored in real time by the automatic viscometer 11 to ensure the stability of the ink viscosity, thereby improving the quality and consistency of the printed products.

[0042] Working principle: During the printing process, the ink pump 10 continuously pumps the ink in the storage tank into the ink tank body 1 through the ink inlet 6 via the ink inlet pipe 9. The excess ink in the tank flows back to the ink storage tank 7 through the return pipe 12 via the return port 5. This continuous circulation not only keeps the ink in a flowing state and effectively prevents the sedimentation of solid particles in the ink, but also allows the ink to be monitored in real time by the automatic viscometer 11 during the circulation process. Once the viscosity is found to deviate from the standard value, it can be corrected in time by adjusting the ink formula or temperature to ensure that the viscosity of the ink is always stable within the optimal printing range.

[0043] Through the above technical solution, this application can reduce the volume of ink to be contained, effectively reduce production and processing costs, and improve the quality and consistency of printed materials.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A printing apparatus for letter printing, characterized in that, include: The ink tank body (1) is provided with a printing roller (2) inside the ink tank, and the printing roller (2) is used for printing ink; The ink tank body (1) is provided with an ink placement groove (3) inside, and the outer contour of the ink placement groove (3) is arc-shaped. The bottom of the ink tank body (1) is provided with an ink outlet (4), a return outlet (5) and an ink inlet (6), and the ink inlet (6) and the return outlet (5) are connected to the ink storage tank (7) through pipelines.

2. The printing equipment for letter printing according to claim 1, characterized in that, The printing roller (2) is located in the middle of the ink trough (3).

3. The printing equipment for letter printing according to claim 2, characterized in that, The outer contour of the ink trough (3) is parallel to the outer contour of the printing roller (2).

4. The printing equipment for letter printing according to claim 1, characterized in that, The ink outlet (4) and the return outlet (5) are located on both sides of the bottom of the ink tank body (1).

5. The printing equipment for letter printing according to claim 1, characterized in that, The ink inlet (6) is located on the side of the ink tank body (1).

6. The printing equipment for letter printing according to claim 1, characterized in that, The ink outlet (4) is equipped with a control valve (8), and the ink outlet (4) switches the ink outlet pipe open and closes through the control valve (8).

7. The printing equipment for letter printing according to claim 1, characterized in that, The ink inlet (6) is connected to the ink storage tank (7) through the ink inlet pipe (9), and the ink inlet pipe (9) is used to transport ink to the ink tank body (1).

8. The printing equipment for letter printing according to claim 7, characterized in that, The ink inlet pipe (9) is equipped with an ink pump (10), which is used to pump ink from the ink tank (7) into the ink tank body (1).

9. The printing equipment for letter printing according to claim 7, characterized in that, The ink storage tank (7) is equipped with an automatic viscometer (11), which is used to monitor the viscosity of the ink.

10. The printing equipment for letter printing according to claim 1, characterized in that, The return port (5) is connected to the ink storage tank (7) through the return pipe (12), and the return pipe (12) is used to transport ink to the ink storage tank (7).

Images