A 3D printing additive manufacturing apparatus

Abstract

This utility model discloses a 3D printing additive manufacturing equipment, which includes a control power supply and a pneumatic control device. The core structure also includes: a lifting plate connected to a lifting drive mechanism; an ultraviolet lamp irradiation module mounted on the lifting plate and having an adjustable light direction ultraviolet lamp assembly; a dispensing module mounted on the ultraviolet lamp bracket, with the dispensing end surrounded by the ultraviolet lamp assembly and the air inlet end connected to the pneumatic control device; a positive power supply connection block sleeved on the dispensing end of the dispensing module and connected to the positive terminal of the control power supply; and a dispensing platform located below the dispensing module, with a metal negative pressure plate at the top and connected to the negative terminal of the control power supply. In addition, a heating module is provided outside the dispensing module, and the lifting drive mechanism adopts a double guide rail and lead screw nut assembly to ensure accuracy. This equipment is based on electrohydrodynamics (EHD) technology and drives dispensing through "electric field + air pressure", which has non-contact printing characteristics, high printing accuracy and stability, and is suitable for processing complex display screen structures.

Description

Technical Field

[0001] This utility model relates to the field of OLED / LCD / LED display processing technology, specifically to a 3D printing additive manufacturing equipment. Background Technology

[0002] In the field of OLED / LCD / LED display manufacturing, the core principle of traditional 3D printing technologies (such as SDM additive manufacturing) is to use a dispensing needle to extrude molten material and then stack it layer by layer to form the target shape. However, when micro- and nano-level printing is required, this technology has significant drawbacks: 1. It requires matching micro-nano-level dispensing needles, which have high processing precision requirements and are expensive to manufacture; 2. The extremely small aperture of micron- or nanon-sized needles leads to a significant decrease in printing flow rate, severely reducing production efficiency; 3. The tiny pores are easily clogged by glue impurities, requiring frequent machine shutdowns for cleaning, which affects the stability and continuity of processing.

[0003] In the field of dispensing, EHD technology refers to dispensing technology based on electrohydrodynamics. Its working principle involves applying a high voltage to the printing nozzle while simultaneously grounding the collection substrate, creating a high-intensity electric field between the nozzle and the collection plate. When the adhesive solution is extruded from the nozzle tip, free charges are generated on the surface of the adhesive solution to shield the high-intensity electric field. These charges move from high potential to low potential within the electric field, simultaneously driving the flow of the adhesive solution at the nozzle tip. This causes the adhesive solution to form a cone below the nozzle. As the electric field force increases the tensile force at the cone tip, a jet is eventually formed, achieving the dispensing operation. EHD dispensing technology has many advantages, such as droplet volume as low as the femtoliter, sub-micron resolution, and nanometer-level printing precision, making it suitable for high-precision dispensing of complex patterns.

[0004] To address the aforementioned issues, this invention proposes a 3D printing additive manufacturing device based on electrohydrodynamics (EHD) technology, which avoids the shortcomings of traditional FDM technology through structural optimization and technological innovation. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a 3D printing additive manufacturing device.

[0006] To solve the above-mentioned technical problems, this utility model achieves the following solution: A 3D printing additive manufacturing equipment of this utility model includes a control power supply and a pneumatic control device. The equipment further includes: Lifting drive mechanism; The lifting plate is driven and connected to the lifting drive mechanism; An ultraviolet lamp irradiation module is mounted on the lifting plate along the Z-axis. The ultraviolet lamp irradiation module has an ultraviolet lamp bracket and several ultraviolet lamp components mounted on the ultraviolet lamp bracket. The light direction of the ultraviolet lamp components is adjustable. The dispensing module is installed on the UV lamp bracket. The dispensing end of the dispensing module is surrounded by several UV lamp components, and its air inlet is connected to the air pressure control device through an air pipe. A positive power connector is fitted onto and fixed to the dispensing end of the dispensing module. The positive power connector is connected to the positive output end of the control power supply via a positive power line. A dispensing platform is located below the dispensing module. The upper end of the dispensing platform is a metal negative pressure plate, which is connected to the negative output terminal of the control power supply via a negative power connection line.

[0007] Furthermore, the lifting drive mechanism includes: The upright plate and the control box installed in the upper area of ​​the upright plate, wherein the front of the upright plate is provided with double guide rails; Z-axis power source installed on the vertical plate; A lead screw and nut assembly is rotatably mounted on the vertical plate and arranged along the Z-axis. The Z-axis power source drives the lead screw connected to the lead screw and nut assembly. The nut of the lead screw and nut assembly is fixedly connected to the lifting plate. The lifting plate is slidably connected to the double guide rails via a slider.

[0008] Furthermore, the UV lamp bracket has a cylindrical structure, which is fixed to the lifting plate. Multiple connecting plates are distributed in a ring array at its lower end. A side plane is provided on the inner side of the cylindrical structure, and the dispensing module is installed on the side plane.

[0009] Furthermore, the connecting plate is provided with four plates, and each connecting plate is connected to a set of ultraviolet lamp components.

[0010] Furthermore, the ultraviolet lamp assembly includes an ultraviolet lamp mounting bracket and an ultraviolet lamp; The first end of the straight section of the UV lamp mounting bracket is rotatable and angularly oriented after rotation, and is connected to the lower end of the connecting plate. The second end of the straight section is connected to a right-angled U-shaped frame, and the UV lamp is rotatable and angularly oriented after rotation, and is mounted on the right-angled U-shaped frame.

[0011] Furthermore, the upper surface of the metal negative pressure plate is provided with an array of negative pressure holes.

[0012] Furthermore, a heating module is provided outside the glue cylinder body of the dispensing module.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model of 3D printing additive manufacturing equipment is compatible with a variety of materials and has strong versatility: hot melt adhesive can be heated by the heating module, and UV adhesive can be cured by the adjustable ultraviolet lamp irradiation module, so as to achieve compatibility with a variety of printing materials such as hot melt adhesive and UV adhesive without the need to replace the core components. 2. This utility model of 3D printing additive manufacturing equipment avoids the defects of micro-nano needles, reducing costs and increasing efficiency: Based on EHD technology, it uses "electric field + air pressure" to drive the glue dispensing, which can achieve micron to nano-level printing effects even with a larger diameter dispensing module, eliminating the need to manufacture micro-nano needles and reducing costs; the larger diameter increases glue flow and improves printing efficiency; at the same time, it avoids the problem of clogging by small apertures and improves stability. 3. The 3D printing additive manufacturing equipment of this utility model is non-contact printing and adaptable to complex scenarios: the non-contact glue dispensing method driven by electric field has low requirements for the flatness of the printing surface and can be adapted to workpieces of various shapes such as flat and curved surfaces, especially suitable for printing complex structures such as ultra-narrow bezels of display screens; 4. This utility model of 3D printing additive manufacturing equipment has high printing accuracy and stability: the lifting drive mechanism adopts "double guide rail + lead screw and nut assembly" to ensure the movement accuracy of the lifting plate; the ultraviolet lamp assembly can be directionally adjusted to ensure uniform curing of the adhesive layer; the array of negative pressure holes of the metal negative pressure plate can firmly fix the workpiece and avoid printing deviation. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the 3D printing additive manufacturing equipment of this utility model; Figure 2 This is a schematic diagram of the dispensing state of this utility model; Figure 3 This is an installation structure diagram of the ultraviolet lamp irradiation module and the dispensing module of this utility model.

[0015] The following components are labeled in the attached diagram: 1. Control power supply; 2. Air pressure control device; 3. Air pipe; 4. Dispensing module; 5. Positive power connection block; 6. Dispensing platform; 7. Negative power connection line; 8. Positive power line; 9. UV lamp irradiation module; 10. Heating module; 11. Control box; 12. Slider; 13. Lifting plate; 14. Workpiece; 15. 3D printing adhesive; 16. Lead screw and nut assembly; 17. UV lamp assembly; 91. UV lamp bracket. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1: The specific structure of this utility model is as follows: Please refer to the appendix. Figure 1-3 This utility model discloses a 3D printing additive manufacturing equipment, including a control power supply 1 and a pneumatic control device 2. The equipment also includes: Lifting drive mechanism; The lifting plate 13 is driven and connected to the lifting drive mechanism; The ultraviolet lamp irradiation module 9 is mounted on the lifting plate 13 along the Z-axis. The ultraviolet lamp irradiation module has an ultraviolet lamp bracket 91 and a plurality of ultraviolet lamp assemblies 17 mounted on the ultraviolet lamp bracket 91. The light direction of the ultraviolet lamp assembly 17 is adjustable. The dispensing module 4 is installed on the UV lamp bracket 91. The dispensing end of the dispensing module 4 is surrounded by several UV lamp components 17, and its air inlet is connected to the air pressure control device 2 through the air pipe 3. The positive power connector 5 is fitted onto and fixed to the dispensing end of the dispensing module 4. The positive power connector 5 is connected to the positive output end of the control power supply 1 through the positive power line 8. The dispensing platform 6 is located below the dispensing module 4. The upper end of the dispensing platform 6 is a metal negative pressure plate, which is connected to the negative output terminal of the control power supply 1 through the negative power connection line 7.

[0019] The lifting drive mechanism includes: The upright plate and the control box 11 installed in the upper area of ​​the upright plate, wherein the front of the upright plate is provided with double guide rails; Z-axis power source installed on the vertical plate; A lead screw and nut assembly 16 is rotatably mounted on the vertical plate and is arranged along the Z-axis. The Z-axis power source drives the lead screw connected to the lead screw and nut assembly 16. The nut of the lead screw and nut assembly 16 is fixedly connected to the lifting plate 13. The lifting plate 13 is slidably connected to the double guide rail via a slider 12.

[0020] The UV lamp bracket 91 has a cylindrical structure, which is fixed to the lifting plate 13. Multiple connecting plates are distributed in a ring array at its lower end. A side plane is provided on the inner side of the cylindrical structure, and the dispensing module 4 is installed on the side plane.

[0021] The connecting plate is provided with four plates, and each connecting plate is connected to a set of ultraviolet lamp components 17.

[0022] The ultraviolet lamp assembly 17 includes an ultraviolet lamp mounting bracket and an ultraviolet lamp; The first end of the straight section of the UV lamp mounting bracket is rotatable and angularly oriented after rotation, and is connected to the lower end of the connecting plate. The second end of the straight section is connected to a right-angled U-shaped frame, and the UV lamp is rotatable and angularly oriented after rotation, and is mounted on the right-angled U-shaped frame.

[0023] The upper surface of the metal negative pressure plate is provided with an array of negative pressure holes.

[0024] A heating module 10 is provided outside the glue tube body of the dispensing module 4. Example 2:

[0025] The following is the hot melt adhesive 3D printing process of the 3D printing additive manufacturing equipment of this utility model: Preliminary preparation: Place workpiece 14 on the metal negative pressure plate of dispensing platform 6, start the negative pressure system, and firmly fix workpiece 14 through array of negative pressure holes; Parameter adjustment: Adjust the temperature of the heating module 10 to reach the melting point of the hot melt adhesive. The temperature is set according to the type of hot melt adhesive, usually 80-150℃, to ensure that the adhesive can be extruded smoothly. Debug the air pressure control device 2 and the control power supply 1: Determine the appropriate air pressure parameters, which are usually 0.1-0.5MPa and voltage parameters, which are usually 5-30kV, through experiments to ensure that the glue is stably dispensed under the action of the electric field; Printing Startup: Import the target 3D model into the device, and the device automatically generates the printing trajectory; start the lifting drive mechanism, and the Z-axis power source drives the lead screw and nut assembly 16 to lower the lifting plate 13 and the dispensing module 4 to the initial printing height; Start the air pressure control device 2 and control power supply 1: the air pressure pushes the hot melt adhesive to the dispensing end, and at the same time, an electric field is formed between the positive electrode of the dispensing end of the dispensing module 4 and the negative electrode of the metal negative pressure plate. Under the action of the electric field force, the adhesive is sprayed from the dispensing end to the surface of the workpiece to achieve non-contact printing. Layer-by-layer curing and stacking: After each layer is printed, the equipment pauses for a preset time, which is set according to the cooling and curing speed of the hot melt adhesive, usually 5-30 seconds. After the adhesive layer has cured naturally, the lifting drive mechanism drives the dispensing module 4 to rise to the preset layer height and continue printing the next layer until a complete printed entity is formed. Example 3:

[0026] This embodiment focuses on UV adhesive materials, utilizing the device's UV lamp irradiation module and EHD technology to achieve printing. The specific steps are as follows: Preliminary preparation: Same as in Example 1, fix workpiece 14 through the negative pressure hole of the metal negative pressure plate; Parameter adjustment: Adjust the UV lamp irradiation module 9: Based on the photosensitive characteristics of the UV adhesive, set the UV lamp wavelength (usually 365-405nm) and the single irradiation time (usually 1-5s) to ensure that the adhesive layer can be pre-cured quickly; Adjusting air pressure and voltage parameters: Same as in Example 1, determine the appropriate air pressure (0.05-0.3MPa) and voltage (8-35kV) to ensure stable dispensing of UV adhesive under the action of electric field; Printing Start: Import the 3D model and generate the printing trajectory. The lifting drive mechanism lowers the dispensing module 4 to its initial height. Activate air pressure, electric field, and UV lamp: Air pressure pushes the UV adhesive to the dispensing end, and the electric field drives the adhesive to be sprayed onto the workpiece surface; at the same time, adjust the illumination direction of the UV lamp assembly 17 so that the UV light is focused on the freshly sprayed adhesive layer, so that "printing-pre-curing" can be carried out simultaneously, ensuring that the adhesive layer has a certain compressive strength and avoiding subsequent stacking deformation; Final Curing and Shaping: After printing layer by layer to the target shape, the UV lamp module 9 is activated for overall curing (irradiation time is usually 10-30 seconds) to ensure that all adhesive layers are completely cured, resulting in the final printed entity, as shown below. Figure 2 The 3D printing adhesive 15 shown.

[0027] In summary, the 3D printing additive manufacturing equipment of this utility model is compatible with a variety of materials and has strong versatility: the heating module can heat hot melt adhesive, and the adjustable ultraviolet lamp irradiation module can cure UV adhesive, realizing the compatibility with a variety of printing materials such as hot melt adhesive and UV adhesive, without the need to replace the core components. This utility model of 3D printing additive manufacturing equipment avoids the defects of micro-nano needles, reducing costs and increasing efficiency: Based on EHD technology, it uses "electric field + air pressure" to drive the glue dispensing, which can achieve micron to nano-level printing effects even with a larger diameter dispensing module, eliminating the need to manufacture micro-nano needles and reducing costs; the larger diameter increases glue flow and improves printing efficiency; at the same time, it avoids the problem of clogging by small apertures and improves stability. This utility model of 3D printing additive manufacturing equipment is non-contact printing and adaptable to complex scenarios: the non-contact glue dispensing method driven by electric field has low requirements for the flatness of the printing surface and can be adapted to workpieces of various shapes such as flat and curved surfaces, and is especially suitable for printing complex structures such as ultra-narrow bezels of display screens. This utility model of 3D printing additive manufacturing equipment features high printing accuracy and stability: the lifting drive mechanism adopts a "double guide rail + lead screw and nut assembly" to ensure the movement accuracy of the lifting plate; the ultraviolet lamp assembly can be directionally adjusted to ensure uniform curing of the adhesive layer; the array of negative pressure holes in the metal negative pressure plate can firmly fix the workpiece and avoid printing deviation.

[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A 3D printing additive manufacturing equipment, comprising a control power supply (1) and a pneumatic control device (2), characterized in that, The device also includes: Lifting drive mechanism; The lifting plate (13) is driven and connected to the lifting drive mechanism. An ultraviolet lamp irradiation module (9) is mounted on the lifting plate (13) along the Z-axis. The ultraviolet lamp irradiation module has an ultraviolet lamp bracket (91) and several ultraviolet lamp assemblies (17) mounted on the ultraviolet lamp bracket (91). The light direction of the ultraviolet lamp assembly (17) is adjustable. The dispensing module (4) is installed on the UV lamp bracket (91). The dispensing end of the dispensing module (4) is surrounded by several UV lamp components (17), and its air inlet is connected to the air pressure control device (2) through an air pipe (3). A positive power connector (5) is fitted onto the dispensing end of the dispensing module (4) and fixed thereon. The positive power connector (5) is connected to the positive output end of the control power supply (1) via a positive power line (8). The dispensing platform (6) is located below the dispensing module (4). The upper end of the dispensing platform (6) is a metal negative pressure plate, which is connected to the negative output terminal of the control power supply (1) through the negative power connection line (7).

2. The 3D printing additive manufacturing equipment according to claim 1, characterized in that, The lifting drive mechanism includes: The upright plate and the control box (11) installed in the upper area of ​​the upright plate, wherein the front of the upright plate is provided with double guide rails; A Z-axis power source installed on the vertical plate; A rotatable lead screw and nut assembly (16) is mounted on the vertical plate and is arranged along the Z-axis. The Z-axis power source drives the lead screw connected to the lead screw and nut assembly (16). The nut of the lead screw and nut assembly (16) is fixedly connected to the lifting plate (13). The lifting plate (13) is slidably connected to the double guide rail via a slider (12).

3. The 3D printing additive manufacturing equipment according to claim 1, characterized in that, The UV lamp bracket (91) has a cylindrical structure, which is fixed to the lifting plate (13) on one side. Multiple connecting plates are distributed in a ring array at its lower end. A side plane is provided on the inner side of the cylindrical structure, and the dispensing module (4) is installed on the side plane.

4. The 3D printing additive manufacturing equipment according to claim 3, characterized in that, The connecting plate is provided with four plates, and each connecting plate is connected to a set of ultraviolet lamp components (17).

5. The 3D printing additive manufacturing equipment according to claim 4, characterized in that, The ultraviolet lamp assembly (17) includes an ultraviolet lamp mounting bracket and an ultraviolet lamp; The first end of the straight section of the UV lamp mounting bracket is rotatable and angularly oriented after rotation, and is connected to the lower end of the connecting plate. The second end of the straight section is connected to a right-angled U-shaped frame, and the UV lamp is rotatable and angularly oriented after rotation, and is mounted on the right-angled U-shaped frame.

6. The 3D printing additive manufacturing equipment according to claim 1, characterized in that, The upper surface of the metal negative pressure plate is provided with an array of negative pressure holes.

7. The 3D printing additive manufacturing equipment according to claim 1, characterized in that, A heating module (10) is provided outside the glue tube body of the dispensing module (4).

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