Printing ink circulating supply device

Abstract

The utility model relates to the field of printing equipment, and discloses a printing ink circulating supply device which comprises a printing ink groove and a baffle, the baffle divides the printing ink groove into a supply groove and an overflow groove, a stirring mechanism is arranged at the bottom of the supply groove and comprises a rotating shaft and paddles, and the two ends of the rotating shaft are rotationally connected with the inner wall of the supply groove. One end, extending out of the supply groove, of each rotating shaft is connected with the output end of a motor, the multiple blades are fixedly arranged on the rotating shafts in rows, and the multiple rotating shafts are arranged at the bottom of the supply groove at equal intervals; in the two paddles located in the same row on the adjacent rotating shafts, the blade of one paddle can be cut into the space between the blades of the other paddle; all the rotating shafts rotate at the same frequency; the technical problem that in the prior art, ink is accumulated in an ink fountain and cannot be fully stirred or circulated is solved.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, in particular to an ink circulation supply device. Background Art

[0002] Film gravure printing is a direct packaging printing method that prints patterns, texts and other elements by directly pressing the printing ink contained in the gravure indentations onto the plastic film.

[0003] In the prior art, for example, the Chinese patent "A plastic packaging film printing ink circulation supply device" with the authorization announcement number CN 215096414 U includes an ink tank and a storage barrel, a baffle is provided in the ink tank, the height of the baffle is lower than the tank depth of the ink tank, the baffle divides the ink tank into an ink supply tank and an overflow tank, a reflux port is provided at the bottom of the overflow tank, and the reflux port is connected to the storage barrel through a reflux pipe; the printing roller is located in the ink supply tank, a material mixing pipe is provided in the ink supply tank, a plurality of discharge holes are provided on the material mixing pipe, and the material mixing pipe is arranged in parallel behind the printing roller;

[0004] The ink flows from the mixing pipe to the overflow tank. In order to ensure that the plate roller can be fully stained with ink, the ink in the supply tank has a certain depth, which causes the ink to accumulate at the bottom of the baffle in the supply tank. The ink that has been accumulated for a long time is prone to stratification and agglomeration due to lack of sufficient stirring or circulation. In addition, various impurities may be mixed into the ink during production, storage and use. The impurities settle to the bottom by gravity and gather together to form larger agglomerates. These agglomerates may wrap more impurities, forming a vicious circle, which in turn affects the printing quality. If the machine is stopped to clean the bottom of the tank, it will affect production efficiency and waste ink. Utility Model Content

[0005] The utility model aims to provide an ink circulation supply device to solve the technical problem in the prior art that ink is accumulated in an ink tank and cannot be fully stirred or circulated.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an ink circulation supply device, comprising an ink tank and a baffle, the baffle divides the ink tank into a supply tank and an overflow tank, a stirring mechanism is provided at the bottom of the supply tank, the stirring mechanism comprises a rotating shaft and a paddle, both ends of the rotating shaft are rotatably connected to the inner wall of the supply tank, one end of the rotating shaft extending out of the supply tank is connected to the output end of the motor, there are multiple paddles, the multiple paddles are fixedly arranged in a row on the rotating shaft, there are multiple rotating shafts, and the multiple rotating shafts are arranged at equal intervals at the bottom of the supply tank; among the two paddles in the same row on adjacent rotating shafts, the blade of one paddle can cut into the space between the blades of the other paddle; all rotating shafts rotate at the same frequency.

[0007] The principles and advantages of this scheme are: during the printing process, the upper part of the ink in the supply slot parallel to the plate roller flows toward the baffle, while the lower layer of ink in the supply slot flows away from the baffle as the stirring mechanism operates, so that convection is formed between the upper and lower layers, and the ink in the bottom area of ​​the baffle is also fully stirred, so that the ink in the supply slot accelerates the mixing of different layers of ink in the supply slot in a flat state, which helps to reduce stratification and the possibility of precipitation; the paddles in the same row on adjacent rotating shafts are staggered to avoid stirring dead corners, so that the pigments, fillers, etc. in the ink are more evenly distributed; the stirring mechanism can reduce the frequency of cleaning the bottom of the ink slot and improve production efficiency.

[0008] As an improvement, the blades are spiral-shaped, the blades on the same rotating shaft have the same spiral direction, and the blades on adjacent rotating shafts have opposite spiral directions.

[0009] The beneficial effect of this improvement is that the design of the spiral blades can more effectively promote the axial flow of ink in the supply groove, forming a more complex flow pattern, thereby further enhancing the stirring effect. The blades on the same shaft have the same spiral direction, which can form a unified rotating force field, while the blades on adjacent shafts have opposite spiral directions, which will produce mutual interference and shearing effects. This design can produce a more intense stirring effect, making the ink more evenly mixed; although the stirring effect is enhanced, the design of the spiral blades can reduce direct shear damage to the ink, especially for inks containing pigment particles or other additives. This design can protect the particle structure in the ink and prevent it from being destroyed by excessive shearing.

[0010] As an improvement, bristles are provided at the blade ends of the paddles.

[0011] The beneficial effects of this improvement are: the presence of the bristles can effectively clean the inner wall, bottom and corners of the supply slot, preventing ink from accumulating and forming sediment in these areas; as the paddles rotate, the bristles will continuously scrape the slot walls and bottom, ensuring uniform distribution of ink and cleanliness of the supply slot; the agglomerates of impurities are deposited at the bottom of the slot due to their large mass, and the brush can sweep the sediment at the bottom away from the plate roller, reducing the impact of the sediment on printing.

[0012] As an improvement, a material mixing pipe is provided in the supply trough, and a filter port is provided at the bottom of the supply trough below the material mixing pipe, and the filter port is connected to a storage tank through a return pipe; a valve and a filter tube are provided on the return pipe, and the ink passes through the valve, the filter tube and the storage tank in sequence from the filter port; the filter tube can be detachably installed on the return pipe, and a filter mesh is clamped in the filter tube.

[0013] The beneficial effect of this improvement is that the stirring mechanism sweeps the bottom sediment to the filter port, and the operator opens the valve regularly to allow the ink containing impurities in the filter port to flow into the reflux pipe. After passing through the filter pipe, agglomerates, impurities and other substances are intercepted, and the filtered ink enters the storage barrel through the reflux pipe, is stirred and filtered, and then pumped to the material mixing pipe, and returns to the ink tank for use; after closing the valve, the filter tube is disassembled to remove the agglomerates and impurities intercepted in it, and then reassembled for use; the performance and efficiency of the ink circulation supply device are improved.

[0014] As an improvement, the filter tube is two half-pipe bodies connected to each other, the two butt ends of the half-pipe bodies are connected by hinges and bolts respectively, the axial ends of the half-pipe bodies are wrapped around the return pipe, and rubber strips are provided at the four ends of the half-pipe bodies.

[0015] The beneficial effects of this improvement are: since the filter tube is connected by two half-pipe bodies through hinges and bolts, it can be easily disassembled and installed. This design greatly simplifies the process of maintaining and replacing the filter screen and improves work efficiency; rubber strips are set at the four ends of the half-pipe body to effectively ensure the sealing performance between the filter tube and the return pipe; this can not only prevent ink leakage during the filtering process, but also ensure that the filtering effect is not affected.

[0016] As an improvement, the filter mesh is made of nylon fiber.

[0017] The beneficial effects of this improvement are: the nylon fiber filter has a smaller mesh size and can achieve higher filtering accuracy; this helps to remove tiny particles and impurities in the ink, ensuring the purity and quality of the ink; and the nylon fiber filter has a lower cost and can be used as a disposable consumable, reducing maintenance costs.

[0018] As an improvement, the filter mesh is a metal mesh.

[0019] The beneficial effect of this improvement is that the metal wire mesh has a smooth surface and a certain elasticity, which can effectively reduce fluid resistance and increase flow; this helps to improve the working efficiency of the ink circulation supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the blade.

[0022] Figure 3 Schematic diagram of the structure of the filter tube. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The figure marks in the drawings of the specification include: ink tank 1, baffle 2, storage barrel 3, ink supply purification device 4, material mixing pipe 5, plate roller 6, reflux pipe 7, paddle 8, bristles 9, filter port 10, valve 11, filter tube 12, semi-pipe body 13, rubber strip 14, bolt hole 15 and filter screen 16.

[0025] Example 1

[0026] Basically as attached Figure 1 As shown, an ink circulation supply device comprises an ink tank 1, a baffle 2, a storage barrel 3 and an ink supply purification device 4 for providing pumping pressure and filtering fine particles in the ink. The baffle 2 divides the ink tank 1 into a supply tank and an overflow tank. The height of the baffle 2 is lower than the tank depth of the ink tank 1. A reflux port is provided at the bottom of the overflow tank, and the reflux port is connected to the storage barrel 3 through a reflux pipe 7. A reflux port is provided at the bottom of the overflow tank, and the reflux port is connected to the storage barrel 3 through the reflux pipe 7. A printing roller is located in the supply tank, and a sparging pipe 5 is provided in the supply tank. The sparging pipe 5 is provided with a plurality of discharge holes. The sparging pipe 5 is arranged in parallel behind the plate roller 6. The outer port of the sparging pipe 5 is connected to the outlet of the ink supply purification device 4, and the inlet of the ink supply purification device 4 is connected to the storage barrel 3 through a pipeline. The ink supply purification device 4 comprises a pneumatic diaphragm pump and an ink filter. The inlet of the pneumatic diaphragm pump is connected to the storage barrel 3 through a pipeline, and the outlet of the ink filter is connected to the sparging pipe 5 through the supply pipe.

[0027] The ink in the supply tank overflows from the baffle 2 to the overflow tank, and enters the reflux pipe 7 along the reflux port, and then enters the storage barrel 3 for temporary storage. The outlet of the storage barrel 3 is connected to the ink supply purification device 4, which pumps out the ink in the storage barrel 3. The ink supply purification device 4 presses the ink out of the outlet of the storage barrel 3 and purifies the fine particles, and then flows through the pipeline to the mixing pipe 5. The multiple discharge holes on the mixing pipe 5 return the ink to the ink tank 1, thereby realizing the circulation of the ink.

[0028] As attached Figure 2 As shown, a stirring mechanism is provided at the bottom of the supply trough, and the stirring mechanism includes a rotating shaft and a paddle 8. Both ends of the rotating shaft are rotatably connected to the inner wall of the supply trough, and one end of the rotating shaft extending out of the supply trough is connected to the output end of the motor. There are multiple paddles 8, and multiple paddles 8 are fixedly arranged in a row on the rotating shaft, and there are multiple rotating shafts; along the direction of the material mixing pipe 5, multiple rotating shafts are arranged at equal intervals at the bottom of the supply trough by the baffle 2; the paddles 8 located in the same row on adjacent rotating shafts are staggered, and the blades of one paddle 8 can cut into the space between the blades of another paddle 8; so that the stirring ranges of the paddles 8 located in the same row are continuous.

[0029] One end of the rotating shaft extending out of the supply slot is fixedly connected to a sprocket, and the sprockets of multiple rotating shafts are meshed through chains to form a chain transmission system, so that the paddles 8 on multiple rotating shafts rotate in the same direction and at the same frequency, and the rotation of adjacent paddles 8 in the same row is coordinated without interference. The sprocket of one of the rotating shafts is fixedly connected to a driving motor, which is used to realize the rotation of all the paddles 8; all the sprockets and chains are installed on the outer wall of the ink tank 1. The blades of the paddle 8 are spiral-shaped, and the paddles 8 on the same rotating shaft have the same spiral direction, and the paddles 8 on adjacent rotating shafts have opposite spiral directions, so that the paddles 8 on two adjacent rotating shafts push the ink flow in opposite directions. The blade ends of the paddle 8 are provided with bristles 9.

[0030] The drive motor is started, and the meshing transmission of the chain and the sprocket realizes that all the paddles 8 rotate at the same frequency, pushing the ink of the entire lower layer from the baffle 2 to the direction of the material mixing pipe 5. Furthermore, the ink in the adjacent shaft areas flows staggered to achieve the mixing of the lower layer of ink; the ink at the bottom of the baffle 2 is removed and the vacancy causes the upper layer of ink to fall, accelerating the mixing of the upper and lower layers of ink. The bristles 9 on the blades of the paddle 8 contact and clean the bottom, inner wall and corner of the ink tank 1 to avoid the possibility of ink accumulation.

[0031] A filter port 10 is provided at the bottom of the supply tank below the material mixing tube 5, and the filter port 10 is connected to the storage barrel 3 through the return pipe 7; the bottom of the overflow tank is in a constricted shape, and the area of ​​the supply tank located at the filter port 10 is also in a constricted shape; a valve 11 and a filter tube 12 are provided on the return pipe 7, and the ink passes through the valve 11, the filter tube 12 and the storage barrel 3 in sequence from the filter port 10; the filter tube 12 is detachably mounted on the return pipe 7, and a filter screen 16 is clamped in the filter tube 12. The return pipe 7 where the valve 11 and the filter tube 12 are located is a vertical pipe section.

[0032] The brush 9 on the paddle 8 sweeps the fuel or impurity particles that cannot be re-blended into the ink by stirring toward the filter port 10. The operator opens the valve 11 regularly, so that the ink with impurities above the filter port 10 flows into the reflux pipe 7, and the impurity particles are intercepted on the filter screen 16. The remaining normal ink enters the storage barrel 3 and flows back to the ink tank 1 through the ink supply purification device 4 and the material mixing pipe 5. After the filter screen 16 has been used for a period of time, the filter tube 12 is disassembled with the valve 11 closed, and the filter screen 16 clamped in the filter tube 12 is cleaned or replaced.

[0033] As attached Figure 3As shown, the filter tube 12 is two half-pipe bodies 13 connected to each other, and the two butt ends of the half-pipe body 13 are connected by hinges and bolts respectively, and the bolt fixing end is provided with a bolt hole 15. The axial ends of the half-pipe body 13 are wrapped on the return pipe 7, and the four ends of the half-pipe body 13 are provided with rubber strips 14; the end faces of the two half-pipe bodies 13 butted against each other are sealed by two layers of rubber fitting and extrusion. The two ports connecting the return pipe 7 and the filter tube 12 are in a stepped shape extending outward; the rubber strips 14 at the upper and lower ends of the half-pipe body 13 are wrapped around the outward extension of the return pipe 7, and the rubber strips 14 are deformed by the stepped shape, and the port is sealed and firmly connected.

[0034] The bolts of the two half-pipe bodies 13 are threadedly removed from the bolt holes 15, so that the two half-pipe bodies 13 are slightly unfolded from the hinges and then removed from the return pipe 7. The filter screen 16 is then removed from the inner wall clamping part of the half-pipe body 13 to achieve replacement and cleaning. The filter screen 16 is nylon fiber or metal wire mesh. The clamping part of the filter screen 16 has a certain deformation ability, so that when the filter screen 16 is clamped on the inner wall of the half-pipe body 13, the two half-pipe bodies 13 can still be slightly unfolded to be removed from the return pipe 7.

[0035] Example 2

[0036] On the basis of Example 1, the storage barrel is horizontally arranged, the inlet of the storage barrel is located above one end of the storage barrel, and the outlet of the storage barrel is located below the other end of the storage barrel. The ink in the storage barrel flows horizontally from the inlet to the outlet. The circumferential outer wall of the storage barrel is provided with a heating layer, and the heating layer is heated by an electric heating wire to heat the ink in the storage barrel to improve the fluidity of the ink.

[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An ink circulation supply device, comprising an ink tank and a baffle, wherein the baffle separates the ink tank into a supply tank and an overflow tank, and is characterized in that: A stirring mechanism is provided at the bottom of the supply trough, and the stirring mechanism includes a rotating shaft and paddles. Both ends of the rotating shaft are rotatably connected to the inner wall of the supply trough, and one end of the rotating shaft extending out of the supply trough is connected to the output end of the motor. There are multiple paddles, and the multiple paddles are fixedly arranged in a row on the rotating shaft. There are multiple rotating shafts, and the multiple rotating shafts are arranged at equal intervals at the bottom of the supply trough; among the two paddles in the same row on adjacent rotating shafts, the blade of one of the paddles can cut into the space between the blades of the other paddle; all rotating shafts rotate at the same frequency.

2. The ink circulation supply device according to claim 1, characterized in that: The blades are spiral-shaped, the blades on the same rotating shaft have the same spiral direction, and the blades on adjacent rotating shafts have opposite spiral directions.

3. The ink circulation supply device according to claim 2, characterized in that: The blade ends of the paddles are provided with bristles.

4. The ink circulation supply device according to claim 3, characterized in that: A material mixing pipe is arranged in the supply tank, a filter port is arranged at the bottom of the supply tank below the material mixing pipe, and the filter port is connected to a storage tank through a return pipe; a valve and a filter tube are arranged on the return pipe, and ink passes through the valve, the filter tube and the storage tank in sequence from the filter port; the filter tube is detachably mounted on the return pipe, and a filter screen is clamped in the filter tube.

5. The ink circulation supply device according to claim 4, characterized in that: The filter tube is in the form of two oppositely connected half-pipe bodies, the two butting ends of the half-pipe bodies are connected by hinges and bolts respectively, the axial ends of the half-pipe bodies are wrapped around the return pipe, and rubber strips are arranged at the four ends of the half-pipe bodies.

6. The ink circulation supply device according to claim 5, characterized in that: The filter screen is made of nylon fiber.

7. The ink circulation supply device according to claim 6, characterized in that: The filter screen is a metal screen.

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