Low-temperature electronic jet printing 3D printer

Abstract

The utility model discloses a low-temperature electronic jet printing 3D printer which comprises an extruder platform capable of achieving two-dimensional movement in the Z-axis direction and the X-axis direction; the printing platform is arranged below the printing spray head, and the bottom of the printing platform is connected with a first lead screw module arranged in the Y-axis direction; and the heat preservation assembly is arranged outside the printing platform and the printing spray head in a wrapping mode and can keep the printing environment in a low-temperature constant state. According to the utility model, the structure fidelity can be kept, the biological activity of the printed living tissue can be recovered, a high-temperature heat source is not needed, the thermal damage or deformation of materials can be avoided, the energy is saved, the environment is protected, the low-temperature constant printing environment can be kept, and finer printing can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printing, and particularly relates to a low-temperature electrospray 3D printer. Background Art

[0002] 3D printing, or additive manufacturing, is an advanced molding technology based on digital model files. By using bondable materials such as powdered metal or plastic and printing layer by layer, the technology can accurately construct various objects. Electrojet printing is a printing technology that uses electric fields and fluid mechanics to achieve high-precision droplet or fiber jetting. It is a digital inkjet printing technology that can be used to prepare microstructures, flexible electronic devices, biochips and other fields. Unlike traditional thermal-driven, piezoelectric-driven and pneumatic-driven printing methods, electrojet printing uses electric field force to pull the printing fluid out of the Taylor cone at the tip of the nozzle.

[0003] However, traditional electrojet printing has very high requirements for the viscosity of printing materials, and the higher temperature has a certain impact on the structural stability of the printed support, which may cause thermal decomposition or degradation of the material. Summary of the invention

[0004] In view of the problems of poor low-temperature thermal insulation environment of existing low-temperature electrojet 3D printers, the utility model provides a low-temperature electrojet 3D printer, which can maintain structural fidelity and restore the biological activity of printed living tissues, does not require a high-temperature heat source, helps to avoid thermal damage or deformation of materials, and is energy-saving and environmentally friendly. At the same time, it can keep the printing environment at a constant low temperature, and can achieve more precise printing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A low-temperature electrospray 3D printer, comprising:

[0007] The extruder platform can realize two-dimensional movement in two directions, the Z-axis direction and the X-axis direction; the extruder platform is provided with a print head with a nozzle facing downwards:

[0008] A printing platform is arranged below the printing nozzle, and the bottom of the printing platform is connected to a first screw module arranged along the Y-axis direction; characterized in that it also includes:

[0009] The heat preservation component is arranged to cover the outside of the printing platform and the printing nozzle, and can keep the printing environment at a constant low temperature.

[0010] The extruder platform is connected to a second screw module arranged along the Z-axis direction, and the second screw module is connected to a third screw module arranged along the X-axis direction;

[0011] The thermal insulation component comprises:

[0012] A heat-insulating enclosure with upper and lower openings, the bottom of which is connected to the printing platform;

[0013] A heat preservation cover is connected to the second screw module, the heat preservation cover is provided with a cavity for accommodating the extruder platform, the upper end of the heat preservation cover is sealed, and the lower end is open, and an outer edge extending outward is provided at the edge of the lower opening of the heat preservation cover, and the outer edge can cover the top opening of the heat preservation enclosure;

[0014] The heat-insulating enclosure is provided with a connection port connected to a cooling medium, and the cooling medium can be input into the heat-insulating enclosure and the interior of the heat-insulating cover through the connection port.

[0015] The cooling medium is nitrogen.

[0016] The upper end of the thermal insulation enclosure is provided with a barrier for preventing air convection.

[0017] The barrier is a sponge.

[0018] A first limit micro switch is provided at the end of the screw of the first screw module;

[0019] A second limit micro switch is provided at the end of the screw of the second screw module;

[0020] A third limit micro switch is provided at the end of the screw of the third screw module.

[0021] The outside of the heat preservation cover is provided with a power supply for providing voltage to the printing nozzle.

[0022] The beneficial effects of the utility model are:

[0023] The utility model arranges a heat-insulating enclosure on a printing platform, introduces nitrogen into the heat-insulating enclosure, and lightly presses a heat-insulating cover onto the sponge on the top of the heat-insulating enclosure, so that the heat-insulating enclosure forms a relatively closed low-temperature environment, thereby preventing the nozzle from being exposed to a room temperature environment during the printing process, preventing the printing from being affected by the external environment, greatly improving the stability of the molding structure of the printing material, improving the printing resolution, and making the printing process more refined.

[0024] The utility model provides an extruder platform on the first screw module arranged along the Z-axis direction and a high-voltage power supply on the heat-insulating cover, so that the overall structure is simple, maintenance is convenient, operation is more convenient and cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2This is a schematic diagram of the structure of the utility model without the thermal insulation cover;

[0027] Figure 3 It is a structural schematic diagram of the thermal insulation cover of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the thermal insulation enclosure of the utility model;

[0029] Markings in the figure: 1. Second motor; 2. Bottom plate; 3. Support frame; 4. Third screw module; 5. First screw module; 6. Third motor; 7. Insulation enclosure; 8. Printing platform; 9. Second screw module; 10. Extruder platform; 11. Insulation board; 12. Insulation cover; 13. Power supply; 14. First motor; 15. Third limit micro switch; 16. First limit micro switch; 17. Insulation board; 18. Print nozzle; 19. Second limit micro switch; 20. Nozzle. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0031] Reference Figures 1 to 4 , a low temperature electrojet 3D printer, comprising:

[0032] The support frame 3 is provided with a third screw module 4 that moves along the X axis on the top thereof, the third screw module 4 is connected to a second screw module 9 that can move along the Z axis, the second screw module 9 is provided with an extruder platform 10, the print head 18 is fixed on the extruder platform 10, the print head 18 is moved vertically up and down through the second screw module 9, and the nozzle 20 of the print head is facing downward, so that the nozzle 20 can be connected to the power supply 13 by wire, the power supply is turned on to charge the nozzle 20, and the printing material is sprayed onto the printing platform 8, so as to print, and also includes:

[0033] The heat preservation cover 12 is connected to the second screw module 9, and is externally provided with a power supply 13 for providing voltage to the nozzle. The heat insulation plate 17 is connected to the heat preservation cover 12 through a hinge. The heat preservation cover 12 is in parallel contact with the upper part of the heat preservation enclosure 7. There is a heat preservation sponge 16 between the heat preservation cover 12 and the heat preservation enclosure 7 to provide a closed temperature environment for the print head 18 to print;

[0034] The heat preservation enclosure 7 is located below the printing nozzle 18. During the printing process, nitrogen is introduced through the pipeline and is in close contact with the heat preservation cover 12, thereby providing a low-temperature printing environment and improving the printing quality and accuracy;

[0035] The third motor 6 is used to drive the second screw module 9 and the thermal insulation cover 12 to move along the X-axis.

[0036] The second motor 1 is used to drive the extruder platform 10 to move along the Z axis.

[0037] The first motor 14 is used to drive the printing platform 8 to move along the Y axis.

[0038] The first screw module, the second screw module and the third screw module are respectively provided with limit micro switches, and the limit micro switches detect the positions of their working states, so as to realize the return of the printer before printing.

[0039] The working principle of the utility model is: homing work and printing work, and the specific steps are as follows:

[0040] Step 1: The third motor 6 starts to work, and the rotation of the third motor 6 drives the ball screw on the third screw module to rotate, thereby driving the second screw module 9 to move along the X-axis direction, and move to touch the third limit micro switch 15, then the third screw module returns to its original position successfully;

[0041] Step 2: The second motor 1 starts to work, and the rotation of the second motor 1 drives the ball screw on the second screw module to rotate, thereby driving the extruder platform 10 to move, and move to touch the first limit micro switch 19, then the second screw module returns to its original position successfully;

[0042] Step 3: The first motor 14 starts to work, and the rotation of the first motor 14 drives the ball screw on the first screw module to rotate, thereby driving the heat preservation enclosure 7 to move, and move to touch the first limit micro switch 16, then the first screw module returns to its original position successfully;

[0043] Step 4: Open the insulation board 17 of the insulation cover 12 and load the printing material into the printing nozzle 18. After connecting the nozzle 20 to the power supply 13 through the wire, start the power supply 13 and close the insulation board 17;

[0044] Step 5: Nitrogen is introduced into the heat-insulating enclosure 7 through the pipeline, and after the temperature inside the box reaches the required temperature, the printer starts working.

[0045] The above shows and describes the basic principles, main features and advantages of the utility model. The utility model is not limited by the above embodiments. The above embodiments and the specification describe the principles of the utility model. Without departing from the creative spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of protection required.

Claims

1. A low temperature electrojet 3D printer, comprising: The extruder platform (10) is capable of two-dimensional movement in the Z-axis direction and the X-axis direction; The extruder platform (10) is provided with a printing nozzle with the nozzle facing downwards: A printing platform is arranged below the printing nozzle, and the bottom of the printing platform is connected to a first screw module arranged along the Y-axis direction; characterized in that it also includes: The heat preservation component is arranged to cover the outside of the printing platform and the printing nozzle, and can keep the printing environment at a constant low temperature.

2. The low temperature electrojet 3D printer according to claim 1, characterized in that: The extruder platform (10) is connected to a second screw module arranged along the Z-axis direction, and the second screw module is connected to a third screw module arranged along the X-axis direction; The thermal insulation component comprises: A heat-insulating enclosure with upper and lower openings, the bottom of which is connected to the printing platform; an insulation cover connected to the second screw module, wherein a cavity for accommodating the extruder platform (10) is provided in the insulation cover, the upper end of the insulation cover is sealed, and the lower end is open, and an outer edge portion extending outward is provided at the edge of the lower opening of the insulation cover, and the outer edge portion can cover the top opening of the insulation enclosure; The heat-insulating enclosure is provided with a connection port connected to a cooling medium, and the cooling medium can be input into the heat-insulating enclosure and the interior of the heat-insulating cover through the connection port.

3. The low temperature electrojet 3D printer according to claim 2, characterized in that: The cooling medium is nitrogen.

4. The low temperature electrospray 3D printer according to claim 2, characterized in that: The upper end of the thermal insulation enclosure is provided with a barrier for preventing air convection.

5. The low temperature electrojet 3D printer according to claim 4, characterized in that: The barrier is a sponge.

6. The low temperature electrojet 3D printer according to claim 2, characterized in that: The end of the screw of the first screw module (5) is provided with a first limit micro switch; the end of the screw of the second screw module is provided with a second limit micro switch; the end of the screw of the third screw module is provided with a third limit micro switch.

7. The low temperature electrospray 3D printer according to claim 2, characterized in that: The exterior of the heat-insulating cover (12) is provided with a power supply (13) for providing voltage to the printing nozzle.

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