An ink filling device

Abstract

The utility model discloses an ink filling equipment, including storage tank, feed unit and filling unit, and feed unit includes feed pump and feed pipeline, be provided with buffer unit between feed unit and filling unit, and buffer unit includes buffer chamber, and buffer chamber includes first rigid shell and first flexible sac, and first flexible sac sets up in first rigid shell, be provided with pressure sensor on feed pipeline. Filling unit includes filling head, and the filling head includes filling drive assembly, storage cylinder and filling nozzle, and filling nozzle slidingly sets up in storage cylinder, and the filling nozzle is provided with filling channel, and storage cylinder is provided with feed port, and the filling channel is provided with the receiving port, and the feed port and receiving port correspond and form the feed channel, and the other end of filling nozzle stretches out storage cylinder and is connected with filling drive assembly, and reset spring is arranged between the upper portion of filling nozzle and storage cylinder. Same pressure can be realized, and accurate filling can be realized.

Description

Technical Field

[0001] This utility model relates to the field of ink filling structure, specifically to an ink filling device. Background Technology

[0002] After the printing ink is prepared, it needs to be filled. Currently, filling methods include gravity filling and pressure filling. Due to the high viscosity of the ink, pressure filling is usually used. Pressure filling typically uses positive displacement pumps such as gear pumps or screw pumps to deliver the ink from the storage tank to the filling nozzle. However, these types of pumps inevitably generate periodic pressure pulsations during operation. Simultaneously, changes in the liquid level in the storage tank and fluctuations in pipeline resistance can also lead to unstable ink pressure at the filling point. This pressure fluctuation is particularly pronounced in the filling process of high-viscosity inks, easily causing the ink to carry air bubbles into the container, severely affecting the quality of subsequent printing or coating. Furthermore, pressure instability directly leads to inconsistent ink volumes, making it difficult to meet the requirements of high-precision quantitative filling. To alleviate this problem, some solutions have attempted to add simple buffer tanks or accumulators to the supply pipeline. However, these passive buffer structures have limited ability to attenuate pressure fluctuations and cannot compensate for the instantaneous pressure at the filling point in real time and dynamically. They are particularly difficult to cope with rapidly changing or random pressure disturbances, resulting in bottlenecks in improving filling accuracy and product yield. Utility Model Content

[0003] The purpose of this invention is to provide an ink filling device to solve the problem that unstable filling pressure directly leads to inconsistent ink volume, making it difficult to meet the requirements of high-precision quantitative filling.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ink filling device, comprising a storage tank, a conveying unit, and a filling unit, wherein the conveying unit includes a feeding pump and a feeding pipeline, a buffer unit is provided between the conveying unit and the filling unit, the buffer unit includes a buffer chamber, the buffer chamber includes a first rigid shell and a first flexible bladder, the first flexible bladder is disposed inside the first rigid shell, and a pressure sensor is provided on the feeding pipeline.

[0005] As a further improvement to the above technical solution: The filling unit includes a filling head, which includes a filling drive assembly, a storage cylinder, and a filling nozzle. The filling nozzle is slidably disposed within the storage cylinder and has a filling channel. The storage cylinder has a feeding port, and the filling channel has a receiving port. The feeding port and the receiving port correspond to form a conveying channel. The other end of the filling nozzle extends out of the storage cylinder and is connected to the filling drive assembly. A return spring is provided between the upper part of the filling nozzle and the storage cylinder.

[0006] The storage cylinder is provided with a return port, which is connected to the storage tank.

[0007] The buffer unit further includes an adjustment chamber, which includes a second rigid shell and a second flexible bladder. The second flexible bladder is disposed inside the second rigid shell, and a compression plate is disposed inside the second rigid shell. A compression drive assembly is disposed at one end of the compression plate.

[0008] The storage tank is equipped with a stirring assembly.

[0009] The filling unit also includes a conveyor belt with clamps on it, and the filling head is mounted above the conveyor belt.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to an ink filling device that employs a series of multi-stage flexible buffer chambers to effectively attenuate pressure pulsations generated by the upstream feeding system, reducing pressure shocks at the source. By incorporating pressure sensors and establishing a closed-loop control system, the filling pressure can be sensed in real time, and rapid compensation can be achieved by fine-tuning the volume or back pressure of the second flexible chamber, thus realizing high-precision dynamic stability of the filling point pressure. This significantly reduces the entrainment of air bubbles during the filling of high-viscosity inks and ensures consistency in filling volume each time, lowering the stringent requirements for the stability of the upstream feeding system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the filling unit structure of this utility model; Figure 3 This is one of the schematic diagrams of the working structure of the filling nozzle of this utility model; Figure 4 This is the second schematic diagram of the working structure of the filling nozzle of this utility model.

[0012] Reference numerals: 1. Storage tank; 21. Feed pump; 22. Feed pipeline; 31. Buffer chamber; 311. First rigid shell; 312. First flexible capsule; 32. Adjustment chamber; 321. Second rigid shell; 322. Second flexible capsule; 323. Extrusion plate; 41. Filling head; 411. Filling drive assembly; 412. Storage cylinder; 413. Filling nozzle; 414. Filling channel; 415. Feed port; 416. Receiver; 417. Return spring; 418. Return port; 42. Conveyor belt; 43. Clamping plate. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1As shown, the ink filling equipment of this embodiment includes a storage tank 1, a conveying unit, and a filling unit. The conveying unit includes a feed pump 21 and a feed pipeline 22. A buffer unit is provided between the conveying unit and the filling unit. The buffer unit includes a buffer chamber 31, which includes a first rigid shell 311 and a first flexible bladder 312. The first flexible bladder 312 is disposed inside the first rigid shell 311. A pressure sensor is provided on the feed pipeline 22. The buffer unit also includes an adjustment chamber 32, which includes a second rigid shell 321 and a second flexible bladder 322. The second flexible bladder 322 is disposed inside the second rigid shell 321. An extrusion plate 323 is disposed inside the second rigid shell 321, and an extrusion drive assembly is provided at one end of the extrusion plate 323. The feed pump 21 is selected as a gear pump or a screw pump to provide the power and basic flow rate required for filling. The supply line 22 connects the first flexible bladder 312 and the second flexible bladder 322 in series along the ink flow direction, ultimately leading to the filling unit. In this embodiment, the filling unit has multiple filling heads 41, therefore the regulating chamber 32 needs to be arranged for multiple filling heads 41 (in a one-to-one or one-to-many manner) to ensure that the output pressure of each filling head is consistent. The volume of the first flexible bladder 312 is larger than that of the second flexible bladder 322. Both flexible bladders are bladder-shaped cavities made of flexible materials (such as rubber or silicone). The first flexible bladder 312 is mainly used to absorb and attenuate the periodic, large-amplitude pressure pulsations generated by the supply pump 2. The pressure fluctuations, after initial attenuation, are transmitted to the second flexible bladder 322, where they undergo secondary fine attenuation. The output pressure is also adjusted to be consistent through the second flexible bladder 322. A pressure sensor is located in the second flexible bladder 322 near the filling unit to ensure the consistency of the output pressure of the filling unit. The pressure sensors are connected to the controller, which compares the threshold values ​​of each pressure sensor. If the pressure difference exceeds the threshold, the extrusion drive assembly drives the extrusion plate 323 to extrude the second flexible capsule 322, changing the expansion value of the second flexible capsule 322, thereby ensuring consistent pressure values. Consistent pressure values ​​are essential for consistent flow rates. It should be noted that the extrusion plate will generate some pressure fluctuations during extrusion, but the fluctuation time is short and does not affect the final filling. Here, only the requirement of consistent outlet pressure is required.

[0018] like Figures 1 to 4As shown, the filling unit includes a filling head 41, which includes a filling drive assembly 411, a storage cylinder 412, and a filling nozzle 413. The filling nozzle 413 is slidably disposed inside the storage cylinder 412. The filling nozzle 413 is provided with a liquid filling channel 414. The storage cylinder 412 is provided with a feed port 415. The liquid filling channel 414 is provided with a receiving port 416. The feed port 415 and the receiving port 416 correspond to form a material conveying channel. The other end of the filling nozzle 413 extends out of the storage cylinder 412 and is connected to the filling drive assembly 411. A return spring 417 is provided between the upper part of the filling nozzle 413 and the storage cylinder 412.

[0019] The storage cylinder 412 is provided with a return port 418, which is connected to the storage tank 1. A negative pressure mechanism should be provided at one end of the return port 418 so that the material in the storage cylinder 412 is sucked away.

[0020] The storage tank 1 is equipped with a stirring assembly. The stirring assembly generally uses a stirring blade. In cases where heating and insulation are required, a storage tank structure with temperature control should be selected.

[0021] The filling unit also includes a conveyor belt 42, on which clamping plates 43 are installed, and a filling head 41 is mounted above the conveyor belt 42. Baffles should be installed on the conveyor belt 42 to intercept the material cans. After interception, the clamping plates 43 hold the material cans in place. If automated production is used, proximity sensors should be installed to detect the position of the material cans and drive the clamping plates 43 to move, thereby achieving the clamping of the material cans.

[0022] Working Principle: After the equipment starts, the feed pump 21 draws ink from the storage tank 1 and delivers it through the feed pipeline 22. The ink first enters the first flexible bladder 312, where its flexible wall absorbs pressure shocks, smoothing the pressure waveform. The ink then enters the second flexible bladder 322 for further pressure equalization. When ink flows from the filling nozzle 6 for filling, the pressure sensor continuously monitors the actual pressure value and transmits it to the controller. The controller compares the real-time pressure value with the internally preset target pressure value, calculating the pressure deviation and its trend. If the detected pressure is lower than the target value, the controller sends a command to the extrusion drive assembly, causing it to drive the extrusion plate 323 to move in the direction of reducing the ink cavity volume, thereby applying a squeezing action to the ink in the cavity and instantly increasing the output pressure at the filling nozzle 413. Conversely, if the detected pressure is higher than the target value, the controller controls the extrusion plate 323 to move in the direction of increasing the ink cavity volume, providing a brief expansion space for the ink and instantly reducing the output pressure. Through this high-frequency, small-amplitude volumetric fine-tuning, a rapid negative feedback closed loop is formed, dynamically stabilizing the pressure at the filling nozzle 413 near a preset constant value, unaffected by upstream pump pulsation or liquid level changes. The filling unit's operation includes: the filling drive assembly 411 drives the filling nozzle 413 downwards. Initially, the filling head 41 descends as a whole until the filling nozzle 413 extends into the material tank, and the storage cylinder 412 abuts against the opening of the material tank. At this point, continued downward movement compresses the return spring 417, causing the filling nozzle 413 to move downwards, exposing the outlet, and allowing material to enter the material tank from the outlet. Residual material in the storage cylinder 412 flows back through the return port 418.

[0023] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics of the solutions is not described in detail here. For those skilled in the art, this utility model is obviously not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An ink filling device, comprising a storage tank (1), a conveying unit, and a filling unit, wherein the conveying unit includes a feed pump (21) and a feed pipeline (22), characterized in that, A buffer unit is provided between the feeding unit and the filling unit. The buffer unit includes a buffer chamber (31). The buffer chamber (31) includes a first rigid shell (311) and a first flexible bladder (312). The first flexible bladder (312) is disposed inside the first rigid shell (311). A pressure sensor is provided on the feeding pipeline (22).

2. The ink filling equipment according to claim 1, characterized in that: The filling unit includes a filling head (41), which includes a filling drive assembly (411), a storage cylinder (412), and a filling nozzle (413). The filling nozzle (413) is slidably disposed in the storage cylinder (412). The filling nozzle (413) is provided with a liquid filling channel (414). The storage cylinder (412) is provided with a feed port (415). The liquid filling channel (414) is provided with a receiving port (416). The feed port (415) and the receiving port (416) correspond to form a material conveying channel. The other end of the filling nozzle (413) extends out of the storage cylinder (412) and is connected to the filling drive assembly (411). A return spring (417) is provided between the upper part of the filling nozzle (413) and the storage cylinder (412).

3. The ink filling equipment according to claim 2, characterized in that: The storage cylinder (412) is provided with a return port (418), which is connected to the storage tank (1).

4. The ink filling equipment according to any one of claims 1 to 3, characterized in that: The buffer unit further includes an adjustment chamber (32), which includes a second rigid shell (321) and a second flexible bladder (322). The second flexible bladder (322) is disposed inside the second rigid shell (321). A compression plate (323) is disposed inside the second rigid shell (321), and a compression drive assembly is disposed at one end of the compression plate (323).

5. The ink filling equipment according to claim 4, characterized in that: The storage tank (1) is equipped with a stirring assembly.

6. The ink filling equipment according to claim 2 or 3, characterized in that: The filling unit also includes a conveyor belt (42), on which a clamp (43) is provided, and the filling head (41) is installed above the conveyor belt (42).

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