Printing ink defoaming treatment device and use method thereof

Abstract

The invention belongs to the technical field of defoaming devices, and discloses a printing ink defoaming treatment device and a using method thereof.The device comprises a sealing cylinder, a piston cylinder and a protective cover, a lifting piston, a drainage exhaust film, a one-way valve and a printing ink inlet and outlet are arranged in the piston cylinder, a lifting cover plate is controlled to be opened and closed through a permanent magnet set, and reciprocating motion of the piston is achieved in cooperation with motor driving; when in use, the device sinks into a printing ink barrel, bubbles are separated by utilizing vacuum through printing ink suction, vacuum defoaming and exhausting and ink discharging circulation operation, the hydrophobic exhausting film is only breathable and does not permeate ink, and impurities are filtered by the metal sieve plate. The device is small in size, portable, easy to move, simple in structure, easy and convenient to operate, high in defoaming efficiency and suitable for small-batch and on-site instant defoaming scenes, and ink pumping external connection treatment is not needed.

Description

Technical Field

[0001] This invention relates to the field of defoaming device technology, and in particular to an ink defoaming treatment device and its usage method. Background Technology

[0002] During the production and processing of ink, ink often contains a large number of air bubbles. These air bubbles can affect the uniformity of the ink and the printing quality. In the existing technology, defoaming devices are usually used to treat the ink to remove air bubbles.

[0003] However, existing ink defoaming devices generally suffer from large size. They require drawing ink from the ink container, injecting it into the device for defoaming, and then returning the treated ink to the container. This method not only occupies a large area but also makes the equipment bulky and inconvenient to move and carry, making it particularly suitable for small-batch ink processing or on-site, immediate defoaming. Furthermore, existing defoaming devices are often complex in structure, cumbersome to operate, and their defoaming efficiency needs improvement. Therefore, a smaller, more portable device that can be directly submerged in the ink container for defoaming is needed to solve these technical problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing ink defoaming device is large in size and requires the ink to be extracted and processed. Therefore, we propose an ink defoaming treatment device and its usage method.

[0005] To achieve the above objectives, this application adopts the following technical solution: an ink defoaming treatment device, including a sealing cylinder and a piston cylinder, the sealing cylinder and the piston cylinder are fixedly connected together by a flange, a protective cover is provided at the lower part of the piston cylinder, a lifting piston is provided inside the piston cylinder, the lifting piston is slidably connected to the piston cylinder, a hydrophobic venting membrane is provided inside the lifting piston, a venting hole is provided above the hydrophobic venting membrane, and a one-way valve is provided inside the venting hole. A bottom partition is provided between the piston cylinder and the protective cover. An ink inlet and outlet are provided on the bottom partition. A hollow piston rod is fixedly connected to the top of the lifting piston by threads. A piston rod cavity is provided inside the hollow piston rod cavity. An opening and closing top rod is inserted into the piston rod cavity. A sliding lifting block is fixedly connected to the upper end of the opening and closing top rod. A composite sliding sleeve is provided at the lower part of the piston rod cavity. The composite sliding sleeve slides in contact with the opening and closing top rod. The inner diameter of the composite sliding sleeve is smaller than the diameter of the sliding lifting block. The opening and closing top rod passes through the bottom partition. A lifting cover plate is fixedly connected to the lower end of the opening and closing top rod. A lifting magnet is embedded in the lifting cover plate, and a bottom fixed magnet is fixedly connected to the bottom of the protective cover. The lifting magnet and the bottom fixed magnet attract each other. An upper fixed magnet is embedded in the bottom partition plate, and the lifting magnet and the upper fixed magnet attract each other.

[0006] Furthermore, a metal screen plate is installed around the protective cover, with densely packed through holes ranging from 0.5 to 2 mm in diameter. These holes prevent impurities in the ink from entering the piston cylinder while ensuring smooth ink flow. By using a metal screen plate with specific hole diameters, particulate impurities, flocculent matter, and other foreign objects in the ink can be effectively intercepted, preventing them from entering the piston cylinder and wearing down core components such as the lifting piston and hydrophobic venting membrane, thus extending the device's service life. Simultaneously, the 0.5-2 mm through-hole design satisfies the impurity interception requirement without hindering the rapid flow of ink, ensuring efficient ink intake and discharge and guaranteeing the smooth progress of the defoaming process.

[0007] Furthermore, a mechanical seal is installed at the connection between the opening / closing rod and the bottom partition. This mechanical seal, made of fluororubber, seals the gap between the opening / closing rod and the bottom partition, preventing ink leakage from the piston cylinder. Fluororubber possesses excellent resistance to ink corrosion, high temperature resistance, and sealing performance. The mechanical seal structure completely seals the gap between the opening / closing rod and the bottom partition, preventing ink leakage from the piston cylinder under negative or positive pressure conditions. This ensures the stability of the vacuum environment within the piston cylinder, guarantees defoaming effects, and prevents ink waste and environmental pollution around the device.

[0008] Furthermore, the lifting cover plate corresponds to the ink inlet and outlet, and a rubber sealing strip is installed above the lifting cover plate. The rubber sealing strip fits snugly against the edges of the ink inlet and outlet. When the lifting cover plate closes the ink inlet and outlet, it achieves a seal inside the piston cylinder, ensuring the vacuum defoaming effect. The rubber sealing strip has good elasticity and sealing performance, and can tightly fit the edges of the ink inlet and outlet, forming a reliable sealing structure when the lifting cover plate is closed. This prevents outside air from entering the piston cylinder and disrupting the vacuum environment, ensuring that air bubbles in the ink can fully rise and separate under vacuum, improving defoaming efficiency and effect, while avoiding ink leakage problems caused by poor sealing.

[0009] Furthermore, a drive motor is fixedly installed at the top of the sealing cylinder. The drive shaft of the drive motor is fixedly connected to a rotating connecting plate. A rotating connecting rod is fixedly connected around the rotating connecting plate. A ball nut is fixedly connected to the lower end of the rotating connecting rod. A reciprocating screw is fixedly connected to the upper end of the hollow piston rod. The reciprocating screw passes through the ball nut and is driven by the ball nut. The drive motor provides stable power, which, in conjunction with the rotating connecting plate and the rotating connecting rod, drives the ball nut to rotate. Through the transmission between the ball nut and the reciprocating screw, the rotational motion of the motor is converted into the linear motion of the reciprocating screw, which in turn drives the hollow piston rod and the lifting piston to move up and down reciprocally. This provides stable power support for ink intake, vacuum defoaming, and exhaust and ink discharge, ensuring the automation and continuous operation of the entire defoaming process and reducing the intensity of manual operation.

[0010] Furthermore, a rotation limiting sleeve is provided between the ball nut and the inner wall of the sealing cylinder. The rotation limiting sleeve is fixedly connected to the inner wall of the sealing cylinder. A flat groove is opened on the surface of the reciprocating screw, and a protrusion matching the flat groove is provided on the inner wall of the rotation limiting sleeve. This is used to restrict the reciprocating screw from rotating synchronously with the ball nut, so that when the ball nut rotates, it drives the reciprocating screw to move the lifting piston up and down reciprocally. The rotation limiting sleeve, through the cooperation of the protrusion and the flat groove of the reciprocating screw, can effectively restrict the rotational freedom of the reciprocating screw, ensuring that when the ball nut rotates, the reciprocating screw only performs vertical linear motion. This avoids problems such as piston jamming and movement deviation caused by the synchronous rotation of the reciprocating screw and the ball nut, ensuring the stability and accuracy of the lifting piston movement, thereby ensuring the accuracy of ink intake and vacuum control, and improving the reliability of the device operation.

[0011] Furthermore, an exhaust sleeve is connected to the top of the sealing cylinder, which also serves as a cable routing point. A dustproof and ventilated cap is installed at the upper end of the exhaust sleeve to prevent external dust from entering the sealing cylinder while ensuring the smooth exhaust of air from within. The exhaust sleeve combines the dual functions of exhaust and cable routing, simplifying the device structure, reducing the number of components, and lowering the device's size and manufacturing cost. The dustproof and ventilated cap effectively blocks external dust and debris from entering the sealing cylinder, preventing dust contamination of internal transmission and electrical components, extending component lifespan, while not affecting the smooth exhaust of air from within the sealing cylinder, ensuring the smooth operation of the exhaust process and the continuity of the defoaming cycle.

[0012] Furthermore, the hydrophobic venting membrane is made of polytetrafluoroethylene (PTFE) with a pore size of 0.1-0.3 μm, allowing only air to pass through while preventing ink penetration. The hydrophobic venting membrane is sealed tightly against the inner wall of the lifting piston, ensuring that ink does not leak into the venting port during the venting process. PTFE material has excellent hydrophobicity, corrosion resistance, and air permeability. The 0.1-0.3 μm pore size design precisely achieves the effect of air permeability without ink penetration. It allows air separated from the ink to pass smoothly into the venting port while completely blocking ink penetration, preventing ink from entering the venting port and the sealing cylinder, thus avoiding contamination and blockage. The sealed fit between the hydrophobic venting membrane and the inner wall of the lifting piston further enhances the sealing effect, preventing ink leakage during the venting process and ensuring venting efficiency and the stability of the device operation.

[0013] Furthermore, the lifting magnet, the bottom fixed magnet, and the top fixed magnet are all permanent magnets. The lifting magnet and the bottom fixed magnet are configured with opposite magnetic poles facing each other, and the lifting magnet and the top fixed magnet are also configured with opposite magnetic poles facing each other. Permanent magnets can maintain a stable magnetic force without additional power supply, reducing the energy consumption of the device. At the same time, the configuration of opposite magnetic poles ensures that a reliable attraction force is formed between the lifting magnet and the bottom and top fixed magnets, achieving precise positioning and stable switching of the lifting cover. The magnetic attraction method has a simple structure and rapid response, ensuring that the lifting cover moves accurately and stably when the ink inlet and outlet are opened and closed, avoiding jamming or poor sealing, and ensuring the smooth operation of the vacuum defoaming and ink discharge process.

[0014] This invention provides another technical solution: a method of using an ink defoaming treatment device, comprising the following steps: S1: Device deployment: Submerge the entire ink defoaming treatment device into the ink to be defoamed, ensuring that the protective cover is completely immersed in the ink, so that the ink can contact the ink inlet and outlet of the bottom partition through the through holes on the metal screen plate, and connect the power supply at the same time. S2: Initial state confirmation. At this time, the lifting magnet and the bottom fixed magnet attract each other, the lifting cover is in the low position, the ink inlet and outlet are in the open state, and the lifting piston is in the lowest position of the piston cylinder. S3: Ink is drawn in, the drive motor is started, the drive motor drives the rotating connecting plate and the rotating connecting rod to rotate, which in turn drives the ball nut to rotate. Since the rotation limit sleeve restricts the rotation of the reciprocating screw through the flat groove, and the reciprocating screw is connected to the ball nut, the rotation of the ball nut drives the reciprocating screw to move upward, which in turn drives the hollow piston rod and the lifting piston to rise synchronously. A negative pressure is formed in the piston cylinder. Under the action of negative pressure, the ink enters the piston cylinder through the through holes of the metal screen plate and the ink inlet and outlet. S4: Vacuum defoaming. When the lifting piston rises to near the top, the composite sliding sleeve inside the hollow piston rod contacts the sliding lifting block and applies an upward thrust, pushing the opening and closing top rod and the lifting cover plate to move upward, causing the lifting magnet to disengage from the bottom fixed magnet. Thus, the lifting magnet then engages with the upper fixed magnet. At this time, the lifting cover plate completely seals the ink inlet and outlet through the rubber sealing strip, stopping the intake of ink. The lifting piston continues to rise a certain distance under the drive of the drive motor, creating a vacuum environment inside the piston cylinder. Under the vacuum, the air bubbles in the ink rise rapidly to the ink surface and overflow and separate. S5: Exhaust and ink discharge. The drive motor continues to run, causing the ball nut to rotate in the opposite direction, which in turn drives the reciprocating screw, hollow piston rod, and lifting piston to descend synchronously. At this time, the lifting magnet is still attracted to the upper fixed magnet. The space inside the piston cylinder shrinks and the pressure increases. The air separated from the upper layer of ink is penetrated through the hydrophobic exhaust membrane and enters the exhaust hole under pressure. It then enters the sealed cylinder through the one-way valve in the exhaust hole and is finally discharged outside the device through the exhaust sleeve. After the air is discharged, the pressure inside the piston cylinder continues to rise. When the pressure is greater than the magnetic force of the lifting magnet and the upper fixed magnet, the pressure pushes the lifting cover plate to move downward, causing the lifting magnet to disengage from the upper fixed magnet and re-engage with the bottom fixed magnet. The lifting cover plate resets, the ink inlet and outlet reopen, and the ink that has eliminated air bubbles in the piston cylinder is discharged into the ink tank through the ink inlet and outlet and the through hole of the metal screen plate under pressure. S6: Circulating defoaming. The drive motor runs continuously, driving the lifting piston to move up and down repeatedly, repeating the process from step 3 to step 5. This cyclical process continuously defoams the ink in the ink tank until the bubbles in the ink are completely eliminated. Then, turn off the drive motor and remove the device from the ink tank.

[0015] The technical effects and advantages of this invention are as follows: This invention features a compact, submersible design that allows for easy movement and portability. It eliminates the need for an ink extraction device, enabling direct defoaming treatment and significantly simplifying the operation process while reducing the equipment's footprint. Furthermore, the use of mutually attracting lifting magnets, a bottom-fixed magnet, and an upper-fixed magnet enables automatic opening and closing of the lifting cover, eliminating the need for an additional drive mechanism. The simple and reliable structure, combined with a hydrophobic venting membrane and a one-way valve, ensures that only air passes through during venting, preventing ink penetration and guaranteeing unobstructed venting without ink leakage. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic cross-sectional view of the sealing cylinder and piston cylinder of the present invention. Figure 1 ; Figure 3 This is a schematic cross-sectional view of the sealing cylinder and piston cylinder of the present invention. Figure 2 ; Figure 4 This is a schematic cross-sectional view of the sealing cylinder and piston cylinder of the present invention. Figure 3 ; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B.

[0017] Legend: 1. Sealing cylinder; 2. Piston cylinder; 3. Protective cover; 4. Metal sieve plate; 5. Lifting piston; 501. Hydrophobic venting membrane; 502. Vent hole; 6. Bottom partition; 7. Ink inlet / outlet; 8. Hollow piston rod; 9. Piston rod cavity; 10. Opening / closing top rod; 11. Sliding lifting block; 12. Composite sliding sleeve; 13. Mechanical seal; 14. Lifting cover plate; 15. Rubber sealing strip; 16. Lifting magnet; 17. Bottom fixed magnet; 18. Upper fixed magnet; 19. Drive motor; 20. Rotating connecting plate; 21. Rotating connecting rod; 22. Ball nut; 23. Reciprocating screw; 24. Rotary limit sleeve; 25. Vent sleeve. Detailed Implementation

[0018] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] Example 1: Overall Structure of the Ink Defoaming Treatment Device Please see Figures 1 to 6 The present invention provides an ink defoaming treatment device, including a sealing cylinder 1 and a piston cylinder 2. The sealing cylinder 1 and the piston cylinder 2 are fixedly connected together by a flange to form an integrally sealed defoaming cavity. A protective cover 3 is provided at the lower part of the piston cylinder 2 to protect the bottom structure of the device and prevent external collision damage.

[0020] A lifting piston 5 is provided inside the piston cylinder 2. The lifting piston 5 is slidably connected to the inner wall of the piston cylinder 2 and can move up and down reciprocally inside the piston cylinder 2. A hydrophobic venting membrane 501 is provided inside the lifting piston 5. The hydrophobic venting membrane 501 is made of polytetrafluoroethylene and has a pore size of 0.1-0.3μm, allowing only air to pass through and preventing ink penetration, ensuring that ink does not leak to the venting hole 502 during the venting process. The hydrophobic venting membrane 501 is sealed and fitted to the inner wall of the lifting piston 5. A venting hole 502 is provided above the hydrophobic venting membrane 501. A one-way valve is provided inside the venting hole 502 to control the unidirectional flow of gas.

[0021] A bottom partition 6 is provided between the piston cylinder 2 and the protective cover 3. An ink inlet and outlet 7 are provided on the bottom partition 6. The bottom partition 6 serves to separate the internal space of the piston cylinder 2 and the protective cover 3. At the same time, the ink inlet and outlet 7 provide a channel for ink to enter and exit the piston cylinder 2.

[0022] A hollow piston rod 8 is threadedly fixed to the top of the lifting piston 5. A piston rod cavity 9 is provided inside the hollow piston rod 8, and an opening / closing push rod 10 is inserted into the piston rod cavity 9. The opening / closing push rod 10 can slide within the piston rod cavity 9. A sliding lifting block 11 is fixedly connected to the upper end of the opening / closing push rod 10. A composite sliding sleeve 12 is provided at the lower part of the piston rod cavity 9. The composite sliding sleeve 12 slides in contact with the opening / closing push rod 10, and the inner diameter of the composite sliding sleeve 12 is smaller than the diameter of the sliding lifting block 11. This structural design allows the opening / closing push rod 10 to move upward when the composite sliding sleeve 12 moves upward and contacts the sliding lifting block 11.

[0023] The opening and closing top rod 10 passes through the bottom partition 6, and a lifting cover plate 14 is fixedly connected to its lower end. The lifting cover plate 14 is correspondingly arranged with the ink inlet and outlet 7 and is used to open or close the ink inlet and outlet 7. A rubber sealing strip 15 is provided above the lifting cover plate 14. The rubber sealing strip 15 fits against the edge of the ink inlet and outlet 7. When the lifting cover plate 14 closes the ink inlet and outlet 7, the inside of the piston cylinder 2 is sealed to ensure the vacuum defoaming effect.

[0024] A metal screen plate 4 is provided around the protective cover 3. The metal screen plate 4 is densely provided with through holes. The diameter of the through holes is 0.5-2mm. This is used to prevent impurities in the ink from entering the piston cylinder 2, while ensuring smooth flow of ink.

[0025] Example 2: Magnet Control System Please see Figure 5The magnet control system of the present invention includes a lifting magnet 16, a bottom fixed magnet 17 and an upper fixed magnet 18. The lifting magnet 16 is embedded in the lifting cover plate 14, the bottom fixed magnet 17 is fixedly connected to the bottom of the protective cover 3, and the upper fixed magnet 18 is embedded in the bottom partition plate 6.

[0026] The lifting magnet 16, the bottom fixed magnet 17, and the upper fixed magnet 18 are all permanent magnets. The lifting magnet 16 and the bottom fixed magnet 17 are configured with opposite magnetic poles facing each other, and the lifting magnet 16 and the upper fixed magnet 18 are also configured with opposite magnetic poles facing each other. This configuration allows the lifting magnet 16 to attract each other with either the bottom fixed magnet 17 or the upper fixed magnet 18.

[0027] In the initial state, the lifting magnet 16 and the bottom fixed magnet 17 are attracted to each other. At this time, the lifting cover 14 is in a low position and the ink inlet / outlet 7 is in an open state. When the lifting cover 14 rises, the lifting magnet 16 and the bottom fixed magnet 17 are disengaged and instead attract to the upper fixed magnet 18. At this time, the lifting cover 14 completely closes the ink inlet / outlet 7.

[0028] Example 3: Motor Drive Mechanism In a preferred embodiment, the drive mechanism is located at the top of the sealing cylinder 1. A drive motor 19 is fixedly installed at the top of the sealing cylinder 1. A rotating connecting disk 20 is fixedly connected to the drive shaft of the drive motor 19. A rotating connecting rod 21 is fixedly connected around the rotating connecting disk 20. A ball nut 22 is fixedly connected to the lower end of the rotating connecting rod 21.

[0029] The upper end of the hollow piston rod 8 is fixedly connected to a reciprocating lead screw 23, which passes through the ball nut 22 and is connected to the ball nut 22 in a transmission manner. A flat groove 27 is provided on the surface of the reciprocating lead screw 23.

[0030] A rotation limiting sleeve 24 is provided between the ball nut 22 and the inner wall of the sealing cylinder 1. The rotation limiting sleeve 24 is fixedly connected to the inner wall of the sealing cylinder 1. The inner wall of the rotation limiting sleeve 24 is provided with a protrusion 28 that matches the flat groove 27, which is used to restrict the reciprocating screw 23 from rotating synchronously with the ball nut 22. When the ball nut 22 rotates, due to the restriction of the cooperation between the protrusion 28 and the flat groove 27, the reciprocating screw 23 cannot rotate with the ball nut 22, but can only move axially, thereby driving the reciprocating screw 23 to drive the lifting piston 5 to move up and down reciprocally.

[0031] Example 4: Hydraulic Drive Mechanism In another preferred embodiment, hydraulic drive is used instead of motor drive. A hydraulic cylinder is provided inside the sealing cylinder 1. The cylinder body of the hydraulic cylinder is fixedly installed on the inner wall of the sealing cylinder 1. The piston rod of the hydraulic cylinder extends downward and is fixedly connected to the upper end of the hollow piston rod 8. The hydraulic cylinder is connected to an external hydraulic pump station through a hydraulic pipeline.

[0032] During operation, the hydraulic pump station supplies oil to the hydraulic cylinder, pushing the piston rod of the hydraulic cylinder to move up or down, thereby driving the hollow piston rod 8 and the lifting piston 5 to reciprocate within the piston cylinder 2, realizing the process of ink intake, vacuum defoaming and discharge.

[0033] Hydraulic drive has the advantages of large driving force and smooth movement, and is suitable for large-volume ink defoaming treatment devices.

[0034] Example 5: Pneumatic Drive Mechanism In another preferred embodiment, a pneumatic drive is used instead of a motor drive, and a cylinder is installed inside the sealing cylinder 1. The cylinder body is fixedly installed on the inner wall of the sealing cylinder 1, and the piston rod of the cylinder extends downward and is fixedly connected to the upper end of the hollow piston rod 8. The cylinder is connected to an external air compressor through an air pipe.

[0035] During operation, the air compressor supplies air to the cylinder, pushing the piston rod of the cylinder to move up or down, thereby driving the hollow piston rod 8 and the lifting piston 5 to reciprocate within the piston cylinder 2, realizing the process of ink intake, vacuum defoaming and discharge.

[0036] Pneumatic drive has the advantages of simple structure, low cost and fast response speed. Since compressed air is used as the power medium, there is no need to worry about ink contamination caused by hydraulic oil leakage.

[0037] Example 6: Other Auxiliary Structures In any of the above embodiments, an exhaust sleeve 25 is connected to the top of the sealing cylinder 1. The exhaust sleeve 25 is also used for the arrangement of cable routing, hydraulic pipelines, or air pipes to ensure that the air in the sealing cylinder 1 is discharged smoothly.

[0038] A mechanical seal 13 is provided at the connection between the opening / closing rod 10 and the bottom partition 6. The mechanical seal 13 is made of fluororubber and is used to seal the gap between the opening / closing rod 10 and the bottom partition 6 to prevent ink leakage from the piston cylinder 2.

[0039] Example 7: Usage Method The present invention also provides a method of using the above-mentioned ink defoaming treatment device, comprising the following steps: S1: Device Deployment The entire ink defoaming device is submerged in the ink to be defoamed, ensuring that the protective cover 3 is completely immersed in the ink. This guarantees that the ink can reach the ink inlet / outlet 7 of the bottom partition 6 through the through holes on the metal screen plate 4, while simultaneously connecting the drive source. At this point, the metal screen plate 4 around the protective cover 3 is immersed in the ink, allowing the ink to enter the interior of the protective cover 3 through the through holes on the metal screen plate 4, and further enter the piston cylinder 2 through the ink inlet / outlet 7.

[0040] S2: Initial State Confirmation At this time, the lifting magnet 16 and the bottom fixed magnet 17 attract each other, the lifting cover plate 14 is in the low position, the ink inlet / outlet 7 is in the open state, and the lifting piston 5 is in the lowest position of the piston cylinder 2. The device is in standby mode.

[0041] S3: Ink Absorption When the drive source is activated, it rotates the ball nut 22, which in turn drives the reciprocating screw 23 to move upward, thereby causing the hollow piston rod 8 and the lifting piston 5 to rise synchronously. A negative pressure is formed inside the piston cylinder 2. Under the action of the negative pressure, the ink enters the piston cylinder 2 through the through holes of the metal screen plate 4 and the ink inlet / outlet 7.

[0042] S4: Vacuum defoaming When the lifting piston 5 rises to near its top, the composite sliding sleeve 12 inside the hollow piston rod 8 contacts the sliding lifting block 11 and applies an upward thrust, pushing the opening and closing top rod 10 and the lifting cover plate 14 upward. This causes the lifting magnet 16 to disengage from the bottom fixed magnet 17, and the lifting magnet 16 then engages with the upper fixed magnet 18. At this time, the lifting cover plate 14 completely seals the ink inlet and outlet 7 through the rubber sealing strip 15, stopping the intake of ink.

[0043] The lifting piston 5 continues to rise a certain distance, creating a vacuum environment inside the piston cylinder 2. Under this vacuum, air bubbles in the ink rapidly rise to the ink surface and overflow, achieving the purpose of vacuum defoaming.

[0044] S5: Exhaust and ink discharge The drive source continues to operate, causing the ball nut 22 to rotate in the opposite direction, which in turn drives the reciprocating screw 23, the hollow piston rod 8, and the lifting piston 5 to descend synchronously. At this time, the lifting magnet 16 remains engaged with the upper fixed magnet 18, and the space inside the piston cylinder 2 shrinks and the pressure increases.

[0045] Under pressure, the air separated from the upper layer of ink penetrates the hydrophobic venting membrane 501 and enters the venting hole 502. It then enters the sealing cylinder 1 through the one-way valve inside the venting hole 502 and is finally discharged outside the device through the venting sleeve 25. Since the hydrophobic venting membrane 501 is made of polytetrafluoroethylene and has a pore size of only 0.1-0.3μm, it only allows air to pass through and prevents ink penetration. Therefore, the ink will not leak to the venting hole 502.

[0046] After the air is expelled, the pressure inside the piston cylinder 2 continues to rise. When the pressure is greater than the magnetic force of the lifting magnet 16 and the upper fixed magnet 18, the pressure pushes the lifting cover 14 to move downward, causing the lifting magnet 16 to disengage from the upper fixed magnet 18 and re-engage with the bottom fixed magnet 17. The lifting cover 14 is then reset, and the ink inlet / outlet 7 is reopened.

[0047] At this time, the ink that has eliminated air bubbles in the piston cylinder 2 is discharged into the ink tank through the ink inlet / outlet 7 and the through holes of the metal screen plate 4 under pressure, thus completing the ink discharge process.

[0048] S6: Circulating defoaming The drive source continues to operate, driving the lifting piston 5 to move up and down repeatedly, repeating the process from step S3 to step S5, and continuously defoaming the ink in the ink tank.

[0049] Through multiple cycles, the air bubbles in the ink are gradually and completely eliminated. Once the air bubbles in the ink are completely eliminated, turn off the drive source and remove the device from the ink container.

[0050] Detailed Explanation of Working Principle The working principle of this invention is based on the principles of vacuum defoaming and pressure ink discharge. The driving mechanism pushes the lifting piston to reciprocate, and the magnetic control system realizes the automatic opening and closing of the lifting cover plate, completing the ink intake, vacuum defoaming and discharge process.

[0051] During the ink intake stage, the drive source drives the ball nut 22 to rotate. Due to the limiting effect of the rotation limit sleeve 24, the reciprocating screw 23 can only move axially, driving the lifting piston 5 to move upward. A negative pressure is formed inside the piston 2, and the ink is drawn into the piston cylinder 2.

[0052] During the vacuum defoaming stage, when the lifting piston 5 approaches the top, the composite sliding sleeve 12 pushes the sliding lifting block 11, which in turn pushes the opening and closing top rod 10 and the lifting cover plate 14 to rise. The lifting magnet 16 changes from being attracted to the bottom fixed magnet 17 to being attracted to the upper fixed magnet 18, and the lifting cover plate 14 seals the ink inlet and outlet 7. The lifting piston 5 continues to rise, forming a vacuum inside the piston cylinder 2. Under the action of the vacuum, the air bubbles in the ink rise rapidly and overflow.

[0053] During the exhaust and ink discharge stage, the lifting piston 5 descends, and the pressure inside the piston cylinder 2 increases. Air is discharged through the hydrophobic exhaust membrane 501 and the one-way valve. When the pressure exceeds the magnetic attraction, the lifting cover 14 opens, and the ink is discharged. This cycle repeats continuously to achieve defoaming.

[0054] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An ink defoaming treatment device, characterized in that, It includes a sealing cylinder and a piston cylinder, which are fixedly connected together by a flange. A protective cover is provided at the lower part of the piston cylinder. A lifting piston is provided inside the piston cylinder and is slidably connected to the piston cylinder. A hydrophobic venting membrane is provided inside the lifting piston. A venting hole is provided above the hydrophobic venting membrane and a one-way valve is provided inside the venting hole. A bottom partition is provided between the piston cylinder and the protective cover. An ink inlet and outlet are provided on the bottom partition. A hollow piston rod is fixedly connected to the top of the lifting piston by threads. A piston rod cavity is provided inside the hollow piston rod. An opening and closing top rod is inserted into the piston rod cavity. A sliding lifting block is fixedly connected to the upper end of the opening and closing top rod. A composite sliding sleeve is provided at the lower part of the piston rod cavity. The composite sliding sleeve slides in contact with the opening and closing top rod. The inner diameter of the composite sliding sleeve is smaller than the diameter of the sliding lifting block. The opening and closing top rod passes through the bottom partition. A lifting cover plate is fixedly connected to the lower end of the opening and closing top rod. A lifting magnet is embedded in the lifting cover plate, and a bottom fixed magnet is fixedly connected to the bottom of the protective cover. The lifting magnet and the bottom fixed magnet attract each other. An upper fixed magnet is embedded in the bottom partition plate, and the lifting magnet and the upper fixed magnet attract each other.

2. The ink defoaming treatment device according to claim 1, characterized in that, The protective cover is surrounded by a metal screen plate with densely packed through holes of 0.5-2mm in diameter. These holes are used to prevent impurities in the ink from entering the piston cylinder while ensuring smooth ink flow.

3. The ink defoaming treatment device according to claim 1, characterized in that, A mechanical seal is provided at the connection between the opening / closing rod and the bottom partition. The mechanical seal is made of fluororubber and is used to seal the gap between the opening / closing rod and the bottom partition to prevent ink leakage from the piston cylinder.

4. The ink defoaming treatment device according to claim 1, characterized in that, The lifting cover plate corresponds to the ink inlet and outlet, and a rubber sealing strip is provided above the lifting cover plate. The rubber sealing strip fits into the edge of the ink inlet and outlet. When the lifting cover plate closes the ink inlet and outlet, it achieves a seal inside the piston cylinder, ensuring the vacuum defoaming effect.

5. The ink defoaming treatment device according to claim 1, characterized in that, A drive motor is fixedly installed on the top of the sealing cylinder. The drive shaft of the drive motor is fixedly connected to a rotating connecting plate. A rotating connecting rod is fixedly connected around the rotating connecting plate. A ball nut is fixedly connected to the lower end of the rotating connecting rod. A reciprocating screw is fixedly connected to the upper end of the hollow piston rod. The reciprocating screw passes through the ball nut and is connected to the ball nut in a transmission manner.

6. The ink defoaming treatment device according to claim 5, characterized in that, A rotation limiting sleeve is provided between the ball nut and the inner wall of the sealing cylinder. The rotation limiting sleeve is fixedly connected to the inner wall of the sealing cylinder. A flat groove is provided on the surface of the reciprocating screw. A protrusion matching the flat groove is provided on the inner wall of the rotation limiting sleeve. This is used to limit the reciprocating screw to rotate synchronously with the ball nut, so that when the ball nut rotates, it drives the reciprocating screw to drive the lifting piston to move up and down reciprocally.

7. The ink defoaming treatment device according to claim 1, characterized in that, The top of the sealing cylinder is connected to an exhaust sleeve, which is also used for cable routing. The upper end of the exhaust sleeve is equipped with a dustproof and breathable cap to prevent external dust from entering the sealing cylinder and to ensure that the air inside the sealing cylinder can be discharged smoothly.

8. The ink defoaming treatment device according to claim 1, characterized in that, The hydrophobic venting membrane is made of polytetrafluoroethylene with a pore size of 0.1-0.3μm, allowing only air to pass through and preventing ink penetration. The hydrophobic venting membrane is sealed to the inner wall of the lifting piston to ensure that ink does not leak into the venting hole during the venting process.

9. The ink defoaming treatment device according to claim 1, characterized in that, The lifting magnet, the bottom fixed magnet, and the upper fixed magnet are all permanent magnets, and the lifting magnet and the bottom fixed magnet are configured with opposite magnetic poles facing each other, and the lifting magnet and the upper fixed magnet are also configured with opposite magnetic poles facing each other.

10. A method of using the ink defoaming treatment device according to claims 1-9, characterized in that, Includes the following steps: S1: Device deployment: Submerge the entire ink defoaming treatment device into the ink to be defoamed, ensuring that the protective cover is completely immersed in the ink, so that the ink can contact the ink inlet and outlet of the bottom partition through the through holes on the metal screen plate, and connect the power supply at the same time. S2: Initial state confirmation. At this time, the lifting magnet and the bottom fixed magnet attract each other, the lifting cover is in the low position, the ink inlet and outlet are in the open state, and the lifting piston is in the lowest position of the piston cylinder. S3: Ink is drawn in, the drive motor is started, the drive motor drives the rotating connecting plate and the rotating connecting rod to rotate, which in turn drives the ball nut to rotate. Since the rotation limit sleeve restricts the rotation of the reciprocating screw through the flat groove, and the reciprocating screw is connected to the ball nut, the rotation of the ball nut drives the reciprocating screw to move upward, which in turn drives the hollow piston rod and the lifting piston to rise synchronously. A negative pressure is formed in the piston cylinder. Under the action of negative pressure, the ink enters the piston cylinder through the through holes of the metal screen plate and the ink inlet and outlet. S4: Vacuum defoaming. When the lifting piston rises to near the top, the composite sliding sleeve inside the hollow piston rod contacts the sliding lifting block and applies an upward thrust, pushing the opening and closing top rod and the lifting cover plate to move upward, causing the lifting magnet to disengage from the bottom fixed magnet. Thus, the lifting magnet becomes attracted to the upper fixed magnet. At this time, the lifting cover plate completely seals the ink inlet and outlet through the rubber sealing strip, stopping the intake of ink. Driven by the motor, the lifting piston continues to rise a certain distance, creating a vacuum environment inside the piston cylinder. Under the vacuum, the air bubbles in the ink rise rapidly to the surface of the ink and overflow and separate. S5: Exhaust and ink discharge. The drive motor continues to run, causing the ball nut to rotate in the opposite direction, which in turn drives the reciprocating screw, hollow piston rod, and lifting piston to descend synchronously. At this time, the lifting magnet is still attracted to the upper fixed magnet. The space inside the piston cylinder shrinks and the pressure increases. The air separated from the upper layer of ink is penetrated through the hydrophobic exhaust membrane and enters the exhaust hole under pressure. It then enters the sealed cylinder through the one-way valve in the exhaust hole and is finally discharged outside the device through the exhaust sleeve. After the air is discharged, the pressure inside the piston cylinder continues to rise. When the pressure is greater than the magnetic force of the lifting magnet and the upper fixed magnet, the pressure pushes the lifting cover plate to move downward, causing the lifting magnet to disengage from the upper fixed magnet and re-engage with the bottom fixed magnet. The lifting cover plate resets, the ink inlet and outlet reopen, and the ink that has eliminated air bubbles in the piston cylinder is discharged into the ink tank through the ink inlet and outlet and the through hole of the metal screen plate under pressure. S6: Circulating defoaming. The drive motor runs continuously, driving the lifting piston to move up and down repeatedly, repeating the process from S3 to S5. This cycle continuously defoams the ink in the ink tank until all bubbles are eliminated. Then, turn off the drive motor and remove the device from the ink tank.

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