A high viscosity paste printhead having a resilient pressure regulating buffer chamber and method

Abstract

The application discloses a high-viscosity slurry print head with an elastic pressure-stabilizing buffer cavity and a method, solves the problem of large pressure fluctuation of a print head in the prior art, has the beneficial effect of guaranteeing the stability of pressure in the printing process, and specifically has the following technical scheme: a high-viscosity slurry print head with an elastic pressure-stabilizing buffer cavity comprises a storage bin, a pressure-stabilizing section and a nozzle which are connected in sequence, a material cavity is arranged in the storage bin, a pre-pressing assembly is arranged in the storage bin, the pre-pressing assembly is movable relative to the storage bin to provide pressure to slurry, the pressure-stabilizing section is internally provided with a buffer cavity, the buffer cavity is communicated with the material cavity, an elastic pressure-stabilizing buffer assembly is arranged on the side wall of the pressure-stabilizing section, the elastic pressure-stabilizing buffer assembly comprises an elastic piece, one end of the elastic piece is in abutment with the side wall of the pressure-stabilizing section, the other end of the elastic piece is limited by a push rod, the push rod is movable relative to the side wall of the pressure-stabilizing section, an elastic diaphragm is arranged on the side wall of the pressure-stabilizing section, the elastic diaphragm covers the push rod, and the elastic diaphragm is in sealing connection with the side wall of the pressure-stabilizing section.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a high-viscosity slurry printhead and method with an elastic pressure-stabilizing buffer cavity. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] With the development of high-performance ceramics and biomedical materials, the solid content in slurry systems is constantly increasing to achieve higher forming accuracy and lower sintering shrinkage. Currently, the solid content of ceramic slurries used for direct-write printing generally reaches 40% to 70%, and some high-performance slurries even exceed 80%. Although high-solids slurries are beneficial for improving the dimensional stability and mechanical properties of printed parts, their viscosity increases significantly, posing numerous technical challenges during the printing process.

[0004] Existing high-viscosity slurry printing equipment mainly uses pneumatic, piston, or screw drive methods to deliver slurry. Pneumatic drive systems use compressed gas to propel the slurry, which can easily cause uneven output and linewidth fluctuations. Piston drive systems use stepper motors or servo motors to drive the piston in reciprocating motion, providing high extrusion pressure. However, due to the pulsed drive characteristics of stepper motors and the backlash in mechanical transmission components, the piston movement produces periodic speed changes, resulting in pulsations in the slurry extrusion pressure. Especially in low-speed or precision printing, these pressure pulsations directly translate into periodic changes in the printed linewidth, affecting print quality. Screw drive systems use a rotating screw to deliver slurry from the barrel to the nozzle, but the structure is relatively complex, manufacturing costs are high, and the minimum extrusion volume is limited by the screw pitch and rotation speed, making it difficult to achieve micro-scale precision printing.

[0005] Besides pressure fluctuations caused by the driving method, high-viscosity inks also face the problem of nozzle clogging during printing. When the ink flows through the nozzle taper, the flow velocity increases, shear stress concentrates, and solid particles in the ink tend to accumulate on the inner wall of the nozzle. Some particles may form bridging structures at the narrowest point of the nozzle, further hindering ink flow and ultimately causing complete nozzle clogging, severely affecting printing continuity. In addition, high-viscosity inks are quite sensitive to temperature. When the temperature in the nozzle area is low, the local viscosity of the ink increases, and the fluidity decreases, further exacerbating the risk of clogging. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber, which has an effective pressure buffering structure and can achieve constant pressure and stable output of high-viscosity slurry.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber includes a storage bin, a pressure-stabilizing section, and a nozzle connected in sequence. The storage bin contains a slurry chamber and a pre-compression component, which is movable relative to the storage bin to provide pressure to the slurry. The pressure-stabilizing section contains a buffer chamber that communicates with the slurry chamber. An elastic pressure-stabilizing buffer component is provided on the side wall of the pressure-stabilizing section. The elastic pressure-stabilizing buffer component includes an elastic element, one end of which abuts against the side wall of the pressure-stabilizing section, and the other end of which is limited by a push rod that is movable relative to the side wall of the pressure-stabilizing section. An elastic diaphragm is provided on the side wall of the pressure-stabilizing section, covering the push rod and sealingly connecting the elastic diaphragm to the side wall of the pressure-stabilizing section.

[0008] As described above, in the printhead, the pre-compression component drives the slurry into the feed chamber and generates extrusion pressure. When the pressure inside the feed chamber fluctuates, the slurry pressure acts on the inner surface of the elastic diaphragm, causing the elastic diaphragm to bulge outward and push the push rod. The push rod compresses the elastic element, which absorbs the pressure fluctuations. When the pressure inside the feed chamber decreases, the elastic element releases its stored elastic potential energy and pushes the push rod, which in turn pushes the elastic diaphragm to rebound, thereby maintaining a stable output pressure inside the feed chamber. Through this elastic pressure stabilizing and buffering mechanism, pressure fluctuations can be effectively absorbed and released, achieving a constant pressure stable output of high-viscosity slurry.

[0009] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber is provided with a protrusion on the side wall of the pressure-stabilizing section, and a groove is provided on the side of the protrusion facing the center of the pressure-stabilizing section. The elastic element and the push rod are placed in the groove. The protrusion provides a space for the elastic element and the push rod, making the structure more compact. The slide groove guides the push rod and ensures that the push rod moves in a radial straight line. The protrusion includes a protruding block and a cover. The protruding block and the cover are detachably connected, which facilitates maintenance and replacement of the elastic element.

[0010] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity is provided. The elastic diaphragm is bent around its periphery and wraps around the push rod. The periphery of the elastic diaphragm protrudes from the protrusion and is fixed by the cover. The positions of the elastic diaphragm and the protrusion correspond one-to-one. The periphery of the elastic diaphragm bends around the push rod and is finally fixed by the cover. Wrapping the push rod achieves dynamic sealing, which ensures that the buffer cavity is isolated from the outside while allowing the push rod to move relative to it. The longitudinal section of the push rod is T-shaped, and one side of the push rod is engaged with one end of the elastic element. The T-shaped push rod and the elastic element are engaged to reliably transmit force. The elastic diaphragm has a large elastic deformation range and can adapt to large pressure fluctuations.

[0011] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber has a circumferentially arranged heating component in the nozzle and a temperature sensor on the inner wall of the nozzle. The temperature sensor and the heating component are each individually connected to a controller. The heating component uniformly heats the nozzle in the circumferential direction, and the temperature sensor monitors the nozzle temperature in real time. The controller adjusts the heating power based on the temperature feedback. By controlling the temperature of the slurry in the nozzle area, the viscosity of the local slurry is reduced, effectively reducing the risk of particle accumulation and bridging blockage. Combined with stable pressure, this further improves the printing quality.

[0012] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber is provided with multiple elastic pressure-stabilizing buffer components. These multiple elastic pressure-stabilizing buffer components are evenly arranged in the circumferential direction of the slurry storage chamber. The central axes of the multiple elastic pressure-stabilizing buffer components are located in the same radial plane of the pressure-stabilizing section. The multiple buffer components are evenly distributed in the circumferential direction, and each component responds synchronously to pressure fluctuations, forming a multi-point collaborative buffering system. This further improves pressure stability, makes the printed line width more uniform and consistent, and at the same time reduces the load on a single component, thus improving reliability.

[0013] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber has a pressure-stabilizing section whose length is less than that of the storage chamber. One end of the pressure-stabilizing section is inserted into the storage chamber and is detachably connected to it. The end of the storage chamber away from the pre-compression component has a reduced-diameter section, which is connected to the pressure-stabilizing section. The inner diameter of the nozzle is smaller than that of the pressure-stabilizing section. The pressure-stabilizing section is inserted into the storage chamber to achieve modular connection, which is convenient for maintenance and replacement. The reduced-diameter section achieves a gradual transition in the slurry chamber, reducing turbulence. The cylindrical pressure-stabilizing section is easy to process and for the buffer component to be installed. The voltage stabilizing section is a cylindrical structural component.

[0014] As described above, in a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber, the length of the pressure-stabilizing section is 1 / 4 to 1 / 7 of the length of the slurry storage chamber, and the inner diameter of the pressure-stabilizing section is 1 / 3 to 1 / 2 of the maximum inner diameter of the slurry chamber. This size ratio optimizes the balance between buffering effect and structural compactness, ensuring that the buffer chamber has sufficient volume change space to absorb pressure fluctuations, while avoiding an excessively large structure.

[0015] As described above, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber includes a pre-pressure component comprising a pre-pressure rod that passes through the top of the storage hopper and is connected to a power source. An end plate is provided at one end of the pre-pressure rod located within the slurry chamber. The power source drives the pre-pressure rod to reciprocate, and the end plate increases the contact area with the slurry, applying pressure evenly to ensure the stability of the slurry extrusion.

[0016] The high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber, as described above, also includes a pressure sensor. The pressure sensor is placed on the inner wall of the storage chamber. The pressure sensor and the pre-compression component are separately connected to the controller. The pressure sensor monitors the pressure in the slurry chamber in real time. The controller adjusts the driving force of the pre-compression component according to the pressure feedback, forming a closed-loop control system to further ensure the pressure stability during the printing process and adapt to slurries of different viscosities.

[0017] Secondly, the present invention also provides a method for operating a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity, comprising the following: When the pressure difference between the front and back of the material chamber exceeds the set value within a set time, the slurry pressure acts on the inner surface of the elastic diaphragm, causing the elastic diaphragm to bulge outward, push the push rod, and compress the elastic element, thereby absorbing some of the pressure fluctuations. When the pressure inside the material chamber decreases, the elastic element releases its stored elastic potential energy and pushes the elastic diaphragm to rebound, thereby maintaining a stable output pressure inside the material chamber.

[0018] As described above, the working method achieves constant pressure and stable output during the printing process of high-viscosity paste by forming a complete pressure fluctuation absorption and release cycle through the elastic deformation of the elastic diaphragm, the reciprocating movement of the push rod, and the compression and release of the elastic element.

[0019] The beneficial effects of the present invention are as follows: This invention utilizes an elastic pressure-stabilizing buffer assembly on the sidewall of the pressure-stabilizing section. This assembly, composed of an elastic diaphragm, a push rod, and an elastic element, actively absorbs and releases pressure fluctuations during slurry extrusion. When the pressure inside the slurry chamber increases, the slurry pressure pushes the elastic diaphragm outward, which in turn pushes the push rod to compress the elastic element. The elastic element stores elastic potential energy, increasing the volume of the buffer chamber and absorbing some of the pressure fluctuations. When the pressure inside the slurry chamber decreases, the elastic element releases its stored elastic potential energy, pushing the push rod and the elastic diaphragm to rebound. The volume of the pressure-stabilizing section decreases, replenishing the slurry to the slurry chamber and maintaining stable output pressure. This dynamic adjustment mechanism effectively reduces pressure pulsation during printing, overcoming the pressure hysteresis problem caused by the compressibility of gas in existing pneumatic drive systems and the periodic pressure pulsation problem caused by the stepping motion of piston drive systems. This improves the uniformity of material output and makes the printed linewidth more stable.

[0020] Multiple elastic pressure-stabilizing buffer components are evenly distributed around the pressure-stabilizing section, with the central axes of each component located in the same radial plane, forming a multi-point collaborative buffering system. When the pressure inside the material chamber fluctuates, the multiple elastic pressure-stabilizing buffer components respond synchronously, collectively absorbing the pressure fluctuations, further improving pressure stability and resulting in more uniform printed linewidths. Simultaneously, the multi-point distribution reduces the load on individual elastic pressure-stabilizing buffer components, improving system reliability and lifespan. Compared to single-point buffering, the multi-point collaborative buffering mechanism offers better pressure equalization and response speed. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a schematic diagram of the structure of a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity in one or more embodiments of the present invention; Figure 2 This is a schematic diagram of a piston pre-compression module in a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity in one or more embodiments of the present invention; Figure 3 This is a cross-sectional view of the middle pressure stabilizing section of a high-viscosity slurry printhead with an elastic pressure stabilizing buffer cavity in one or more embodiments of the present invention. Figure 4 This is a schematic diagram of an elastic diaphragm structure in a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity in one or more embodiments of the present invention; Figure 5 This is a schematic diagram of a nozzle in a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity, according to one or more embodiments of the present invention.

[0023] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0024] The components include: 1. storage silo, 2. pressure stabilizing section, 3. elastic pressure stabilizing buffer assembly, and 4. nozzle; 101. Power source; 102. Preload rod; 201. Cover body; 202. Protruding block; 301. Elastic diaphragm; 302. Push rod; 303. Buffer spring; 401. Heating component; 402. Temperature sensor. Detailed Implementation

[0025] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As described in the background section, existing printheads suffer from significant pressure fluctuations. To address this issue, this invention proposes a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber.

[0027] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber includes a storage bin 1, a pressure-stabilizing section 2, and a nozzle 4 connected in sequence. The storage bin 1 has a slurry chamber for containing and conveying the high-viscosity slurry. A pre-compression assembly is installed inside the storage bin 1. This pre-compression assembly is removable from the storage bin 1 for slurry injection. After injection, the pre-compression assembly is fixed. The pre-compression assembly includes a power source 101 and a pre-compression rod 102. The pre-compression rod 102 passes through the top of the storage bin 1, and its upper end is connected to the power source 101. An end plate is installed at the lower end of the pre-compression rod 102 within the slurry chamber.

[0028] In some examples, the power source 101 is an electric motor, which is connected to the preload rod 102 through a gear and rack mechanism. The power source 101 drives the preload rod 102 to reciprocate, and the end plate increases the contact area with the slurry, applies pressure evenly, and ensures the stability of the slurry extrusion.

[0029] It should be noted that the pressure stabilizing section 2 has an internal buffer chamber, which is connected to the material chamber in the storage silo 1. The side wall of the pressure stabilizing section 2 is equipped with an elastic pressure stabilizing buffer assembly 3. (Refer to...) Figure 3As shown, the elastic pressure-stabilizing buffer assembly 3 includes an elastic diaphragm 301, a push rod 302, and an elastic element, specifically a buffer spring 303. One end of the buffer spring 303 abuts against the side wall of the pressure-stabilizing section 2, and the other end of the buffer spring 303 is limited by the push rod 302. The push rod 302 is movable relative to the side wall of the pressure-stabilizing section 2, and the elastic diaphragm 301 is fixed by the side wall of the pressure-stabilizing section 2. The elastic diaphragm 301 covers the end face of the push rod 302, and the elastic diaphragm 301 is sealed to the side wall of the pressure-stabilizing section 2 to prevent slurry leakage. The peripheral edge of the elastic diaphragm 301 is sealed to the side wall of the pressure-stabilizing section 2, forming a reliable sealing structure, which not only ensures the isolation of the buffer cavity from the outside, but also allows the push rod 302 to drive the buffer spring 303 to move, achieving a dynamic sealing function.

[0030] refer to Figure 2 and Figure 3 The side wall of the voltage stabilizing section 2 is provided with a protrusion, and the inside of the protrusion is provided with a groove on the side facing the center of the voltage stabilizing section 2. The buffer spring 303 and the push rod 302 are placed in the groove. The protrusion provides a space for the buffer spring 303 and the push rod 302 to make the structure more compact. The inside of the protrusion is larger than the outer diameter of the push rod end face. The protrusion is a cylindrical protrusion.

[0031] Specifically, the protrusion includes a protruding block 202 and a cover 201, which are detachably connected via a threaded connection. The protruding block 202 is fixed to the side wall of the pressure stabilizing section 2. The cover 201 is detachably connected to the protruding block and covers the groove. The longitudinal section of the cover 201 is U-shaped. Another function of the cover 201 is to fix the elastic diaphragm 301, ensuring a sealed connection between the elastic diaphragm 301 and the storage bin 1. When maintenance or replacement of the buffer spring 303 is required, the cover 201 can be removed to take out the buffer spring 303 and the push rod 302, making maintenance convenient. In this embodiment, the protrusion structure makes the structure of the elastic pressure stabilizing buffer assembly 3 more compact, the movement of the push rod 302 more stable, and facilitates maintenance and replacement.

[0032] refer to Figure 3 and Figure 4 The elastic diaphragm 301 is bent around its periphery, and the push rod 302 is wrapped around the middle of the elastic diaphragm 301. The periphery of the elastic diaphragm 301 extends from the protruding block 202 after passing the circumferential surface of the push rod 302, and is finally fixed by the cover 201. The cover 201 and the protruding block 201 are engaged and connected. When the two are connected, the periphery of the elastic diaphragm extends beyond the protruding block 202 to ensure a sealed connection between the elastic diaphragm 301 and the storage bin 1. The positions of the elastic diaphragm 301 and the protrusions are one-to-one, and one elastic diaphragm 301 is provided for each protrusion.

[0033] In addition, the elastic diaphragm 301 can be made of silicone. The elastic diaphragm 301 is bent around its periphery and fixed by the cover 201 to form a sealing structure. This ensures that the buffer chamber is isolated from the outside to prevent slurry leakage, while also allowing the push rod 302 to move relative to it, thus achieving a dynamic sealing function. The push rod 302 is wrapped in the middle of the elastic diaphragm 301. When the slurry pressure acts on the inner surface of the elastic diaphragm 301, the elastic diaphragm 301 bulges outward and pushes the push rod 302 outward to achieve pressure transmission. The elastic deformation range of the elastic diaphragm 301 is large, which can adapt to large pressure fluctuations.

[0034] In this embodiment, the longitudinal section of the push rod 302 is T-shaped. One side of the push rod 302 is engaged with one end of the buffer spring 303. Under normal conditions, the end face of the push rod 302 is flush with the inner wall of the storage bin 1. Under the action of fluid pressure, the push rod 302 overcomes the force of the buffer spring 303 and moves towards the outside of the storage bin 1. The T-shaped push rod 302 and the buffer spring 303 are engaged, and the force transmission is reliable. When the push rod 302 moves outward, the push rod 302 compresses the buffer spring 303, and the buffer spring 303 stores elastic potential energy. When the push rod 302 moves inward, the buffer spring 303 releases elastic potential energy and pushes the push rod 302. The push rod 302 pushes the elastic diaphragm 301 to rebound. The T-shaped cross-section structure makes the connection between the push rod 302 and the buffer spring 303 more stable and the force transmission more reliable.

[0035] It is easy to understand that there are multiple elastic voltage stabilizing buffer components 3, which are evenly distributed around the voltage stabilizing section 2. For example, three elastic voltage stabilizing buffer components 3 are provided, and the three components are evenly distributed at 120° intervals around the voltage stabilizing section 2; or four elastic voltage stabilizing buffer components 3 are provided, and the four components are evenly distributed at 90° intervals around the voltage stabilizing section 2. The central axes of the multiple elastic voltage stabilizing buffer components 3 are located in the same radial plane of the voltage stabilizing section 2.

[0036] Furthermore, multiple elastic pressure-stabilizing buffer components 3 are evenly distributed circumferentially. When the pressure inside the material chamber fluctuates, multiple components respond synchronously to the pressure fluctuations and jointly absorb them, forming a multi-point collaborative buffering system. This multi-point collaborative buffering mechanism further improves pressure stability, resulting in more uniform printed linewidths. Simultaneously, the multi-point distribution reduces the load on individual elastic pressure-stabilizing buffer components 3, improving system reliability and lifespan. Compared to single-point buffering, multi-point collaborative buffering offers better pressure balance and response speed.

[0037] It should be noted that in some examples, the length of the pressure stabilizing section 2 is shorter than the length of the storage silo 1, and one end of the pressure stabilizing section 2 is inserted into the storage silo 1 and detachably connected to it. The insertion of the pressure stabilizing section 2 into the storage silo 1 achieves a modular connection, facilitating maintenance and replacement. The end of the storage silo 1 furthest from the pre-compression component has a reduced-diameter section, which connects to the pressure stabilizing section 2. This reduced-diameter section is frustum-shaped and facilitates a gradual transition of the material cavity from the storage silo 1 to the pressure stabilizing section 2, reducing turbulence, making the slurry flow smoother, and also aiding in the acceleration of the slurry.

[0038] In this embodiment, the nozzle 4 is equipped with a tapered material chamber structure, which facilitates a smooth transition of the slurry from the pressure stabilizing section 2 to the nozzle, reduces local shear stress concentration in the slurry, and lowers the risk of particle bridging and clogging. (Reference) Figure 5 As shown, a heating element 401 and a temperature sensor 402 are provided on the inner wall of the nozzle 4. The heating element 401 is specifically a heating resistance wire provided on the inner wall of the nozzle 4, which heats the nozzle. The temperature sensor 402 is provided on the inner wall of the nozzle to monitor the nozzle temperature in real time. The temperature sensor 402 and the heating element 401 are each connected to a controller separately, which is specifically a PLC controller or other type of controller.

[0039] In addition, the inner diameter of the nozzle is smaller than the inner diameter of the pressure stabilizing section 2. The pressure stabilizing section 2 is a cylindrical structure. The cylindrical structure is easy to process and manufacture, and it is easy to install the elastic pressure stabilizing buffer component 3 on the side wall.

[0040] In a specific example, the length of the pressure-stabilizing section 2 is 1 / 5 of the length of the storage hopper 1, and the inner diameter of the pressure-stabilizing section 2 is 2 / 5 of the maximum inner diameter of the material cavity. This size ratio optimizes the balance between buffering effect and structural compactness, ensuring that the buffer cavity has sufficient volume change space to absorb pressure fluctuations, while avoiding an overly large structure.

[0041] It is understandable that the connection between the pressure stabilizing section 2 and the storage bin 1 can be a threaded connection, a snap-fit ​​connection, or other detachable connection; the connection between the protruding block of the protrusion and the cover can also be a snap-fit ​​connection or other detachable connection; the cross-sectional shape of the push rod 302 can be cylindrical or other cross-sectional shapes suitable for moving along the slide; the buffer spring 303 can be a compression spring or a disc spring or other elastic element.

[0042] The working principle of this embodiment is as follows: Power source 101 drives preload rod 102 downward, and end plate of preload rod 102 pushes slurry into the material chamber and generates extrusion pressure. When the pressure difference between the front and back of the material chamber exceeds the set value within a set time, the slurry pressure acts on the inner surface of elastic diaphragm 301, causing elastic diaphragm 301 to bulge outward, pushing push rod 302 outward. Push rod 302 compresses buffer spring 303, which stores elastic potential energy, thereby absorbing some pressure fluctuations and increasing the volume of buffer chamber. When the pressure inside the material chamber decreases, buffer spring 303 releases the stored elastic potential energy, pushing push rod 302 inward. Push rod 302 pushes elastic diaphragm 301 to rebound, and elastic diaphragm 301 returns to its original shape, decreasing the volume of buffer chamber and replenishing slurry into the material chamber, thereby maintaining stable output pressure inside the material chamber. This elastic pressure-stabilizing buffer mechanism can effectively absorb and release pressure fluctuations, achieve constant pressure and stable output of high-viscosity slurry, reduce pressure pulsation during printing, improve output uniformity, and make the printed line width more stable.

[0043] Temperature sensor 402 monitors the nozzle temperature in real time, and the controller determines whether the nozzle temperature has reached the set value based on the temperature signal fed back by temperature sensor 402. When the nozzle temperature is lower than the set value, the controller increases the heating power of heating component 401; when the nozzle temperature reaches the set value, the controller maintains or reduces the heating power to stabilize the nozzle temperature within the set range. By controlling the temperature of the slurry in the nozzle area, the local viscosity of the slurry is reduced, the slurry fluidity is enhanced, and solid particles are less likely to accumulate on the inner wall of the nozzle, making it difficult for bridging structures to form. This effectively reduces the risk of particle accumulation and bridging blockage, and improves printing continuity.

[0044] Example 2 This embodiment also includes a pressure sensor, which is placed on the inner wall of the storage silo 1 or the pressure stabilizing section 2. The pressure sensor monitors the internal pressure of the material chamber and buffer chamber in real time. Each pressure sensor and pre-compression component is individually connected to the controller. The controller determines whether the internal pressure of the material chamber is within the set range based on the pressure signal fed back by the pressure sensor. If the pressure is too high, the controller reduces the driving force of the pre-compression component, reduces the output power of the power source 101, and reduces the advancing speed of the pre-compression rod 102; if the pressure is too low, the controller increases the driving force of the pre-compression component, increases the output power of the power source 101, and increases the advancing speed of the pre-compression rod 102, thereby maintaining the stability of the internal pressure of the material chamber.

[0045] A closed-loop control system, comprised of a pressure sensor and controller, monitors the internal pressure of the printing chamber in real time and automatically adjusts the driving force of the pre-compression component, further ensuring pressure stability during the printing process. This closed-loop control mechanism can adapt to the printing requirements of inks with varying viscosities, improving the system's adaptability and intelligence.

[0046] Based on Example 1, this embodiment further improves print quality through the synergistic effect of temperature control and pressure stability, making the printing process more stable and reliable.

[0047] Example 3 A method for operating a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer chamber includes the following: When the pressure difference between the front and back of the material chamber exceeds the set value within a set time, the slurry pressure acts on the inner surface of the elastic diaphragm, causing the elastic diaphragm to bulge outward, push the push rod, and compress the elastic element, thereby absorbing some of the pressure fluctuations. When the pressure inside the material chamber decreases, the elastic element releases its stored elastic potential energy and pushes the elastic diaphragm to rebound, thereby maintaining a stable output pressure inside the material chamber.

[0048] As described above, the working method achieves constant pressure and stable output during the printing process of high-viscosity paste by forming a complete pressure fluctuation absorption and release cycle through the elastic deformation of the elastic diaphragm, the reciprocating movement of the push rod, and the compression and release of the elastic element.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-viscosity paste printhead with an elastic pressure-stabilizing buffer chamber, characterized in that, The device includes a storage silo, a pressure stabilizing section, and a nozzle connected in sequence. The storage silo has a material chamber and a pre-compression component inside. The pre-compression component is movable relative to the storage silo to provide pressure to the slurry. The pressure stabilizing section has a buffer chamber inside, which is connected to the material chamber. The side wall of the pressure stabilizing section is equipped with an elastic pressure stabilizing buffer component, which includes an elastic element. One end of the elastic element abuts against the side wall of the pressure stabilizing section, and the other end of the elastic element is limited by a push rod. The push rod is movable relative to the side wall of the pressure stabilizing section. The side wall of the pressure stabilizing section is equipped with an elastic diaphragm, which covers the push rod and is sealed to the side wall of the pressure stabilizing section.

2. The high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The sidewall of the voltage stabilizing section is provided with a protrusion, and a groove is provided inside the protrusion on the side facing the center of the voltage stabilizing section. The elastic element and the push rod are placed in the groove. The protrusion includes a protruding block and a cover, and the protruding block and the cover are detachably connected.

3. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 2, characterized in that, The elastic diaphragm is bent around its periphery and wraps around the push rod. The periphery of the elastic diaphragm protrudes from the protrusion and is fixed by the cover. The positions of the elastic diaphragm and the protrusion correspond one-to-one. The longitudinal section of the push rod is T-shaped, and one side of the push rod is inserted into one end of the elastic element.

4. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The nozzle is provided with a heating component in a circumferential manner, and a temperature sensor is provided on the inner wall of the nozzle. The temperature sensor and the heating component are each connected to the controller separately.

5. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The elastic pressure stabilizing buffer assembly is provided in multiple ways, and the multiple elastic pressure stabilizing buffer assemblies are evenly arranged in the circumference of the storage bin, with the central axis of the multiple elastic pressure stabilizing buffer assemblies placed in the same radial plane of the pressure stabilizing section.

6. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The length of the pressure stabilizing section is less than the length of the storage silo. One end of the pressure stabilizing section is inserted into the storage silo and is detachably connected to the storage silo. The end of the storage silo away from the pre-compression component is provided with a reduced diameter section, which is connected to the pressure stabilizing section. The inner diameter of the nozzle is less than the inner diameter of the pressure stabilizing section. The voltage stabilizing section is a cylindrical structural component.

7. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The length of the pressure stabilizing section is 1 / 4 to 1 / 7 of the length of the storage silo, and the inner diameter of the pressure stabilizing section is 1 / 3 to 1 / 2 of the maximum inner diameter of the material cavity.

8. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 1, characterized in that, The pre-compression assembly includes a pre-compression rod that passes through the top of the storage silo and is connected to a power source. An end plate is provided at one end of the pre-compression rod located inside the material cavity.

9. A high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to claim 4, characterized in that, It also includes a pressure sensor, which is placed on the inner wall of the storage silo. The pressure sensor and the pre-compression component are each separately connected to the controller.

10. A method for operating a high-viscosity slurry printhead with an elastic pressure-stabilizing buffer cavity according to any one of claims 1-9, characterized in that, Includes the following: When the pressure difference between the front and back of the material chamber exceeds the set value within a set time, the slurry pressure acts on the inner surface of the elastic diaphragm, causing the elastic diaphragm to bulge outward, push the push rod, and compress the elastic element, thereby absorbing some of the pressure fluctuations. When the pressure inside the material chamber decreases, the elastic element releases its stored elastic potential energy and pushes the elastic diaphragm to rebound, thereby maintaining a stable output pressure inside the material chamber.

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