Double-nozzle direct-writing type 3D printing device

Abstract

A double-nozzle direct-writing type 3D printing device comprises a first frame, a second frame and an air pressure control system, an X-direction driving assembly is arranged on the first frame, a Y-direction driving assembly is arranged on the X-direction driving assembly, a leveling assembly is arranged on the Y-direction driving assembly, and a printing platform is arranged on the leveling assembly; two groups of first guide optical shafts are symmetrically arranged on the second frame, a first supporting plate is mounted on each group of first guide optical shafts through a linear bearing, and the first supporting plates are connected with a first vertical motor mounted on the first frame through first lead screws; the two first supporting plates are connected through two transverse rods, a second supporting plate is installed on the two transverse rods, a second lifting driving assembly is arranged on the second supporting plate, and a printing needle cylinder is installed on the second lifting driving assembly. According to the utility model, the two printing needle cylinders are separately arranged, and the heights of the printing needle cylinders are adjusted through the second lifting driving assembly, so that the switching operation of the double printing nozzles and the convenient and rapid replacement of the printing needle cylinders can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a dual-nozzle direct-writing 3D printing device. Background Art

[0002] With the rapid development of flexible electronic devices in wearable devices, medical health monitoring, the Internet of Things and other fields, people's demand for personalized design and complex structures is constantly increasing. In particular, when preparing flexible electronic devices with multifunctional integration, the materials must have high flexibility, compatibility with complex structures, and the ability to integrate multiple functions. However, traditional molded manufacturing processes often have problems such as high cost and long cycle time when dealing with the complex shapes and functional gradient designs of flexible electronic devices. In recent years, 3D printing technology has provided new solutions for the personalized design and integrated manufacturing of complex structures of flexible electronic devices. 3D printing technology can directly convert digital models into physical objects, making the customized design of flexible electronic devices and the free manufacturing of complex multifunctional structures possible.

[0003] Direct-write 3D printing involves placing a printing ink (or slurry) with specific rheological properties and conformal properties in a syringe and mounting it on a movable three-dimensional platform. Precisely controlled by a computer, the syringe moves along a pre-set trajectory, while a feeding system deposits the printing ink layer by layer onto the build platform. Depending on how the ink solidifies, different processes are used to cure it, such as solvent evaporation or UV light irradiation, ultimately forming the three-dimensional component. This layer-by-layer printing process, characterized by low energy consumption, low cost, and wide applicability, has attracted widespread attention, particularly in the customized design of flexible electronics and the integration of complex multifunctional components.

[0004] At present, the direct-writing 3D printing device is mainly a single-extrusion nozzle device. However, the single-extrusion nozzle device is only suitable for printing samples of a single material and a relatively simple structure. It cannot realize the extrusion printing of multiple materials, and it is difficult to form complex samples as a whole. In contrast, the dual-head collaborative direct-writing 3D printing device (CN202311075788.8) has improved the printing efficiency to a certain extent. However, the distance between its two syringes is small and they are installed on the same connector. As a result, during the printing process, there is mutual interference between the working and non-working syringes. The non-working syringe is not easy to replace, and the non-working nozzle may scratch the sample. Therefore, it is not suitable for printing easily condensed materials such as silicone, which is not conducive to the design, manufacture and integration of flexible electronic devices. Utility Model Content

[0005] Based on this, the purpose of the present utility model is to provide a dual-nozzle direct-writing 3D printing device, in which the two printing syringes are arranged separately, which can realize the dual-nozzle switching operation and the convenient and quick replacement of the printing syringes, avoiding the mutual interference between the working and non-working printing syringes during the printing process, and the problem that the non-working nozzle may scratch the sample.

[0006] A dual-nozzle direct-write 3D printing device comprises a first frame, a second frame arranged on the first frame, and an air pressure control system, wherein the first frame is provided with an X-direction drive assembly, the X-direction drive assembly is provided with a Y-direction drive assembly, the Y-direction drive assembly is provided with a leveling assembly, and the leveling assembly is provided with a printing platform;

[0007] Two groups of first guide light shafts are symmetrically provided on the second frame, the bottom of each group of first guide light shafts is mounted on the first frame, and the top is mounted on the top of the second frame, and a first support plate is mounted on each group of first guide light shafts via a linear bearing, and the first support plate is connected to a first vertical motor mounted on the first frame via a first screw rod;

[0008] The two first support plates are connected by two cross bars, two second support plates are mounted on the two cross bars, each second support plate is provided with a second lifting drive assembly, and a printing syringe is mounted on the second lifting drive assembly;

[0009] The air pressure control system has two output branches, and each output branch is connected to a printing syringe through an air pressure valve.

[0010] Preferably, the second lifting drive assembly includes a second vertical motor installed on the second support plate, a horizontal plate connected to the second support plate through two second guide light axes, an angle code provided on the horizontal plate, and a syringe holder installed on the angle code, and the horizontal plate is connected to the second vertical motor through a second screw rod.

[0011] Preferably, the syringe support comprises a top plate and a bottom plate, and a vertical plate connecting the top plate and the bottom plate;

[0012] The vertical plate is installed on the angle code, and the printing needle cylinder is inserted into the top plate and the bottom plate and fixed by screws.

[0013] Preferably, the leveling assembly includes a platform bracket provided on the Y-direction driving assembly, and a silicone column provided on the platform bracket. An adjusting bolt is provided on the printing platform, and the adjusting bolt passes through the printing platform, the silicone column and the platform bracket in sequence and is connected to the adjusting nut.

[0014] Preferably, the Y-direction driving assembly includes a Y-direction bracket provided on the X-direction driving assembly, a Y-direction guide rail installed on the Y-direction bracket, and a Y-direction slider provided on the Y-direction guide rail, wherein the Y-direction slider is connected to the bottom of the platform bracket via a pad;

[0015] A Y-direction ball screw mechanism is provided between the two Y-direction guide rails. A screw slider in the Y-direction ball screw mechanism is connected to the bottom of the platform bracket, and a Y-direction motor is installed at the end.

[0016] Preferably, the X-direction driving assembly includes an X-direction guide rail provided on the first frame, an X-direction slider provided on the X-direction guide rail, and a connecting block provided on the X-direction slider and connected to the Y-direction bracket;

[0017] An X-direction ball screw mechanism is provided at the bottom of the first frame. A screw slider in the X-direction ball screw mechanism is connected to the bottom of the Y-direction bracket, and an X-direction motor is installed at the end thereof.

[0018] Preferably, the connecting block is an L-shaped plate.

[0019] Preferably, the first frame and the second frame are both made of aluminum profiles.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] By setting the two printing syringes separately and adjusting the height of the printing syringes through the second lifting drive assembly, the dual printing nozzle switching operation and the convenient and quick replacement of the printing syringes can be realized, avoiding the mutual interference between the working and non-working syringes during the printing process, and the problem that the non-working nozzles may scratch the samples, and can carry out personalized multi-material printing and complex component printing; at the same time, it avoids the complexity and high cost of replacing ink storage containers and printing syringes, is suitable for printing easy-to-condense materials such as silicone, and is more conducive to the design, manufacture and integration of flexible electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the process flow of the dual-nozzle direct writing 3D printing device proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the process of combining at least three ultrasonic detection probes into an ultrasonic detection group in the present invention;

[0024] Figure 3 This is a flow chart of building a sample voiceprint library based on a historical database in the present invention.

[0025] Description of main component symbols:

[0026] 10-first frame; 11-second frame;

[0027] 12-X direction drive assembly; 121-X direction guide rail; 122-X direction slider; 123-connecting block; 124-X direction ball screw mechanism; 125-X direction motor;

[0028] 13-Y direction drive assembly; 131- Y direction bracket; 132-Y direction guide rail; 133- Y direction slider 133; 134-Y direction ball screw mechanism; 135-Y direction motor;

[0029] 14-leveling assembly; 141-platform bracket; 142-silicone column;

[0030] 15 - printing platform; 16 - first guide light axis; 17 - first support plate; 18 - first screw rod; 19 - first vertical motor; 20 - crossbar; 21 - second support plate;

[0031] 22 - second lifting drive assembly; 221 - second vertical motor; 222 - second guide optical axis; 223 - horizontal plate; 224 - angle bracket; 225 - needle cylinder bracket; 2251 - top plate; 2252 - bottom plate; 2253 - vertical plate; 226 - second screw rod;

[0032] 23-Printing syringe.

[0033] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0035] See also Figures 1 to 3 In one embodiment of the present invention, a dual-nozzle direct-writing 3D printing device is provided, comprising a first frame 10, a second frame 11 disposed on the first frame 10, and an air pressure control system. The first frame 10 is provided with an X-direction drive component 12, the X-direction drive component 12 is provided with a Y-direction drive component 13, the Y-direction drive component 13 is provided with a leveling component 14, and the leveling component 14 is provided with a printing platform 15;

[0036] Two groups of first guide light shafts 16 are symmetrically provided on the second frame 11. The bottom of each group of first guide light shafts 16 is mounted on the first frame 10, and the top is mounted on the top of the second frame 11. A first support plate 17 is mounted on each group of first guide light shafts 16 via a linear bearing. The first support plate 17 is connected to a first vertical motor 19 mounted on the first frame 10 via a first screw rod 18.

[0037] The two first support plates 17 are connected by two cross bars 20, and two second support plates 21 are installed on the two cross bars 20. Each second support plate 21 is provided with a second lifting drive assembly 22, and a printing syringe 23 is installed on the second lifting drive assembly 22;

[0038] The air pressure control system has two output branches, each of which is connected to a printing syringe 23 through an air pressure valve.

[0039] It should be noted that in the present invention, the air pressure control system serves as the pressure source for extruding the printing material from the two printing syringes 23. The air pressure control system includes an air pump and two air pressure controllers, each connected to the air pressure controllers via pipelines, forming two output branches. Furthermore, the present dual-nozzle direct-write 3D printing device also includes a host computer, which controls all control actions and sends relevant action control instructions.

[0040] Furthermore, the printing platform 15 is leveled by the leveling component 14, the X-direction position of the printing platform 15 is adjusted by the X-direction drive component 12, and the Y-direction position of the printing platform 15 is adjusted by the Y-direction drive component 13, thereby realizing single-layer printing. By controlling the two first vertical motors 19 to rotate in the same direction, the first support plate 17 is made to slide up and down along the first guide light axis 16, that is, multi-layer superimposed printing is realized. The two second lifting drive components 22 are used to make the two printing syringes 23 rise and fall as needed and extrude ink by air pressure, and use them alternately.

[0041] See also Figures 1 to 3 In a preferred embodiment of the present invention, the second lifting drive assembly 22 includes a second vertical motor 221 installed on the second support plate 21, a horizontal plate 223 connected to the second support plate 21 through two second guide light axes 222, an angle code 224 provided on the horizontal plate 223, and a syringe bracket 225 installed on the angle code 224, and the horizontal plate 223 is connected to the second vertical motor 221 through a second screw rod 226.

[0042] It should be noted that, by rotating the second vertical motor 221 , the horizontal plate 223 , the syringe holder 225 and the printing syringe 23 are lifted and lowered along the second guide light axis 222 , and the second guide light axis 222 is used to ensure the smooth rise of the printing syringe 23 .

[0043] See also Figures 1 to 3 In a preferred embodiment of the present invention, the syringe support 225 includes a top plate 2251 and a bottom plate 2252, and a vertical plate 2253 connecting the top plate 2251 and the bottom plate 2252;

[0044] The vertical plate 2253 is installed on the angle code 224 , and the printing syringe 23 is inserted into the top plate 2251 and the bottom plate 2252 and fixed by screws to facilitate replacement of the printing syringe 23 .

[0045] See also Figures 1 to 3 In a preferred embodiment of the present invention, the leveling assembly 14 includes a platform bracket 141 provided on the Y-direction driving assembly 13, and a silicone column 142 provided on the platform bracket 141. An adjusting bolt is provided on the printing platform 15, and the adjusting bolt passes through the printing platform 15, the silicone column 142 and the platform bracket 141 in sequence and is connected to the adjusting nut.

[0046] It should be noted that in this embodiment, the printing platform 15 and the platform support 141 are both rectangular plates. The leveling assembly 14 includes four sets, arranged at the four corners of the printing platform 15. The adjustment nuts are wheel nuts. These adjustment nuts are used to adjust the distance between the printing platform 15 and the platform support 141, thereby leveling the printing platform 15.

[0047] See also Figures 1 to 3 In a preferred embodiment of the present invention, the Y-direction driving assembly 13 includes a Y-direction bracket 131 provided on the X-direction driving assembly 12, a Y-direction guide rail 132 installed on the Y-direction bracket 131, and a Y-direction slider 133 provided on the Y-direction guide rail 132. The Y-direction slider 133 is connected to the bottom of the platform bracket 141 through a pad. The Y-direction guide rail 132 and the Y-direction bracket 131 ensure the stability of the movement of the printing platform 15 in the Y direction.

[0048] A Y-direction ball screw mechanism 134 is provided between the two Y-direction guide rails 132 . The screw slider in the Y-direction ball screw mechanism 134 is connected to the bottom of the platform bracket 141 , and a Y-direction motor 135 is installed at the end thereof.

[0049] See also Figures 1 to 3In a preferred embodiment of the present invention, the X-direction driving assembly 12 includes an X-direction guide rail 121 provided on the first frame 10, an X-direction slider 122 provided on the X-direction guide rail 121, and a connecting block 123 provided on the X-direction slider 122 and connected to the Y-direction bracket 131. The X-direction guide rail 121 and the X-direction slider 122 ensure the smooth movement of the printing platform 15 in the X-direction.

[0050] An X-direction ball screw mechanism 124 is provided at the bottom of the first frame 10 . The screw slider in the X-direction ball screw mechanism 124 is connected to the bottom of the Y-direction bracket 131 , and an X-direction motor 125 is installed at the end thereof.

[0051] See also Figures 1 to 3 In a preferred embodiment of the present invention, the connecting block 123 is an L-shaped plate to facilitate the installation of the Y-direction bracket 131 on the X-direction slider 122.

[0052] See also Figures 1 to 3 In a preferred embodiment of the present invention, the first frame 10, the second frame 11, and the Y-direction bracket 131 are all made of aluminum profiles.

[0053] It should be noted that the 3D printing process in this utility model is carried out through the following steps:

[0054] S1. Ink preparation: Prepare two inks with different compositions and load them into two printing syringes 23 respectively. For personalized printing or complex structure printing, different ink configurations are made according to different requirements.

[0055] S2. Parameter Control: Set the print heads and 3D printing parameters required for 3D printing different areas and different numbers of layers in the slicing software of the host computer. 3D printing parameters include inputting the inner diameter of the print needle, setting the print speed, extrusion pressure, print path, etc.

[0056] S3. Material printing: The second lifting drive assembly 22 is used to lift the printing syringe 23 as needed and extrude ink through air pressure. At the same time, the X-direction position of the printing platform 15 is adjusted by the X-direction drive assembly 12, and the Y-direction position of the printing platform 15 is adjusted by the Y-direction drive assembly 13, thereby achieving single-layer printing. By controlling the two first vertical motors 19 to rotate in the same direction, the first support plate 17 slides up and down along the first guide light axis 16, that is, multi-layer superimposed printing is achieved. Then, the two second lifting drive assemblies 22 are used to respectively lift and lower the two printing syringes 23 as needed and extrude ink through air pressure, and use them alternately.

[0057] According to the above method, the printing methods of different materials are described in detail below:

[0058] When printing a dual-silicone device, first, silicone A and silicone B are loaded into the two printing syringes 23, respectively. Both silicone A and silicone B have certain rheological properties and conformal capabilities, and can be attached to the printing platform 15 as needed. Base materials such as polyimide film, aramid, etc.

[0059] A three-dimensional model is established according to the needs of the device, and a printing path is planned. Then, parameters are adjusted according to step S2, and extrusion printing is performed according to step S3. The second lifting drive component 22 is used to lift the printing syringe 23 as needed and extrude ink through air pressure. First, the printing syringe equipped with silicone rubber A is extended through the corresponding second lifting drive component 22 so that its vertical direction is lower than the other printing syringe 23, and the printing platform 15 is adjusted to a suitable distance. At the same time, ink is extruded and printed according to the predetermined path. After the printing of silicone rubber A is completed, the second lifting drive component 22 is used to lift the printing syringe 23 equipped with silicone rubber A, and then the other second lifting drive component 22 is used to extend the printing syringe 23 equipped with silicone rubber B to continue printing according to the predetermined path.

[0060] At the same time, the X-direction position of the printing platform 15 is adjusted by the X-direction driving assembly 12, and the Y-direction position of the printing platform 15 is adjusted by the Y-direction driving assembly 13, thereby achieving single-layer printing. By controlling the two first vertical motors 19 to rotate in the same direction, the first support plate 17 is made to slide up and down along the first guide optical axis 16, thus achieving multi-layer superimposed printing.

[0061] Furthermore, the two second lifting drive assemblies 22 are used to respectively lift and lower the two printing syringes 23 as needed and squeeze out the ink through air pressure, so that the printing nozzles are used alternately, and the two inks are stacked layer by layer on the printing platform 15;

[0062] After printing is completed, it is dried first. After drying, the device sample can be removed. If a substrate is pasted on the printing platform, the substrate can be peeled off and taken out together with the device, and then heating or other methods can be used to accelerate drying.

[0063] Compared with the prior art, the beneficial effects of the present invention are:

[0064] By setting the two printing syringes 23 separately and adjusting the height of the printing syringes 23 by the second lifting drive assembly 22, the switching operation of the dual printing nozzles and the convenient and quick replacement of the printing syringes 23 can be realized, avoiding the mutual interference between the working and non-working syringes during the printing process, and the problem that the non-working nozzles may scratch the samples, and can carry out personalized multi-material printing and complex component printing; at the same time, it avoids the complexity and high cost of replacing the ink storage container and the printing syringe 23, is suitable for printing easy-to-condense materials such as silicone, and is more conducive to the design, manufacture and integration of flexible electronic devices.

[0065] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-nozzle direct-writing 3D printing device, comprising a first frame, a second frame arranged on the first frame, and an air pressure control system, characterized in that: An X-direction driving assembly is provided on the first frame, a Y-direction driving assembly is provided on the X-direction driving assembly, a leveling assembly is provided on the Y-direction driving assembly, and a printing platform is provided on the leveling assembly; Two groups of first guide light shafts are symmetrically provided on the second frame, the bottom of each group of first guide light shafts is mounted on the first frame, and the top is mounted on the top of the second frame, and a first support plate is mounted on each group of first guide light shafts via a linear bearing, and the first support plate is connected to a first vertical motor mounted on the first frame via a first screw rod; The two first support plates are connected by two cross bars, two second support plates are mounted on the two cross bars, each second support plate is provided with a second lifting drive assembly, and a printing syringe is mounted on the second lifting drive assembly; The air pressure control system has two output branches, and each output branch is connected to a printing syringe through an air pressure valve.

2. The dual-nozzle direct writing 3D printing device according to claim 1, characterized in that: The second lifting drive assembly includes a second vertical motor installed on the second support plate, a horizontal plate connected to the second support plate through two second guide light axes, an angle code provided on the horizontal plate, and a syringe bracket installed on the angle code, and the horizontal plate is connected to the second vertical motor through a second screw rod.

3. The dual-nozzle direct writing 3D printing device according to claim 2, characterized in that: The syringe support comprises a top plate and a bottom plate, and a vertical plate connecting the top plate and the bottom plate; The vertical plate is installed on the angle code, and the printing needle cylinder is inserted into the top plate and the bottom plate and fixed by screws.

4. The dual-nozzle direct writing 3D printing device according to claim 1, characterized in that: The leveling assembly includes a platform bracket provided on the Y-direction driving assembly, and a silicone column provided on the platform bracket. An adjusting bolt is provided on the printing platform, and the adjusting bolt passes through the printing platform, the silicone column and the platform bracket in sequence and is connected to the adjusting nut.

5. The dual-nozzle direct writing 3D printing device according to claim 4, characterized in that: The Y-direction driving assembly includes a Y-direction bracket provided on the X-direction driving assembly, a Y-direction guide rail installed on the Y-direction bracket, and a Y-direction slider provided on the Y-direction guide rail, wherein the Y-direction slider is connected to the bottom of the platform bracket through a pad; A Y-direction ball screw mechanism is provided between the two Y-direction guide rails. A screw slider in the Y-direction ball screw mechanism is connected to the bottom of the platform bracket, and a Y-direction motor is installed at the end.

6. The dual-nozzle direct writing 3D printing device according to claim 5, characterized in that: The X-direction driving assembly includes an X-direction guide rail provided on the first frame, an X-direction slider provided on the X-direction guide rail, and a connecting block provided on the X-direction slider and connected to the Y-direction bracket; An X-direction ball screw mechanism is provided at the bottom of the first frame. A screw slider in the X-direction ball screw mechanism is connected to the bottom of the Y-direction bracket, and an X-direction motor is installed at the end thereof.

7. The dual-nozzle direct writing 3D printing device according to claim 6, characterized in that: The connecting block is an L-shaped plate.

8. The dual-nozzle direct writing 3D printing device according to any one of claims 1 to 7, characterized in that: The first frame and the second frame are both made of aluminum profiles.

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