阅读说明：本技术 一种多材料混合3d打印成型装置 (Multi-material mixing 3D printing forming device ) 是由 陈华伟 赵松 张力文 周煜 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种多材料混合3D打印成型装置。该多材料混合3D打印成型装置中的执行机构包括三轴联动平台和设置在三轴联动平台上的打印喷头和多个点胶针压筒；三轴联动平台与控制系统电连接；打印喷头包括喷头本体和设置在喷头本体上的喷嘴；喷头本体内开设有多个微流通道；各微流通道的一端均与喷嘴连通；各微流通道的另一端与对应的点胶针压筒连接；一个点胶针压筒对应一个微流通道；各点胶针压筒内储存不同的打印材料；气压驱动系统与各点胶针压筒均通过气管连通；气压驱动系统用于产生气压以推动点胶针压筒内的打印材料进入对应的微流通道,从而实现多材料打印。本发明能够实现多材料3D打印,提升打印速度,降低打印成本。(The invention discloses a multi-material mixing 3D printing and forming device. The actuating mechanism in the multi-material mixing 3D printing and forming device comprises a three-axis linkage platform, a printing spray head and a plurality of dispensing needle pressing cylinders, wherein the printing spray head and the plurality of dispensing needle pressing cylinders are arranged on the three-axis linkage platform; the three-axis linkage platform is electrically connected with the control system; the printing nozzle comprises a nozzle body and a nozzle arranged on the nozzle body; a plurality of micro-flow channels are arranged in the spray head body; one end of each micro-flow channel is communicated with the nozzle; the other end of each micro-flow channel is connected with a corresponding dispensing needle pressing cylinder; a dispensing needle pressing cylinder corresponds to a microfluidic channel; different printing materials are stored in the rubber needle pressing cylinders of each point; the pneumatic driving system is communicated with the rubber needle pressing cylinders of each point through air pipes; the air pressure driving system is used for generating air pressure to push printing materials in the dispensing needle pressing cylinder to enter the corresponding micro-flow channel, so that multi-material printing is realized. The invention can realize multi-material 3D printing, improve the printing speed and reduce the printing cost.)

1. The utility model provides a many materials mix 3D and print forming device which characterized in that includes: the device comprises a control system, an air pressure driving system and an actuating mechanism; the control system is electrically connected with the actuating mechanism; the pneumatic driving system is communicated with the actuating mechanism through an air pipe;

the actuating mechanism comprises a three-axis linkage platform, a printing spray head and a plurality of dispensing needle pressing cylinders; the three-axis linkage platform is provided with the printing spray head and a plurality of dispensing needle pressing cylinders; the three-axis linkage platform is electrically connected with the control system; the printing nozzle comprises a nozzle body and a nozzle; the nozzle body is provided with the nozzle; a plurality of micro-flow channels are formed in the spray head body; one end of each micro-flow channel is communicated with the nozzle; the other end of each micro-flow channel is connected with a corresponding dispensing needle pressing cylinder; one dispensing needle pressing cylinder corresponds to one micro-flow channel; different printing materials are stored in each dispensing needle pressing cylinder; the pneumatic driving system is communicated with each dispensing needle pressing cylinder through a gas pipe; the pneumatic driving system is used for generating pneumatic pressure to push the printing materials in the dispensing needle pressing cylinder to enter the corresponding micro-flow channel, so that multi-material printing is realized.

2. The multi-material mixing 3D printing and forming device according to claim 1, wherein an annular groove is formed around the nozzle body; the annular groove is communicated with the printing spray head; the annular grooves are separated by partition plates to form a plurality of annular areas; a dispensing barrel is sleeved on one side of the annular groove, which is far away from the printing nozzle; the dispensing needle pressing cylinders are all arranged inside the dispensing barrel; the dispensing barrel is communicated with the air pressure driving system through an air pipe; the same printing material is placed in each of the annular areas; when the hollow tubular structure is printed, the pneumatic driving system is used for enabling the interior of the dispensing barrel to generate air pressure so as to push the printing materials in the annular areas to enter the nozzles.

3. The multi-material mixing 3D printing and forming device as claimed in claim 2, wherein the pneumatic driving system comprises an air compressor and a multi-split pneumatic valve; the air compressor is communicated with the multi-split air pressure valve; the multi-split air pressure valve is communicated with the dispensing needle pressing cylinder and the dispensing barrel through air pipes.

4. The multi-material mixing 3D printing and forming device according to claim 2, wherein each air pipe is provided with an electromagnetic valve; the electromagnetic valve is electrically connected with the control system; the control system is used for controlling the opening and closing of the electromagnetic valve.

5. A multi-material mixing 3D printing forming device according to claim 1, wherein the control system comprises a control panel and a multi-axis controller; the control panel is electrically connected with the three-axis linkage platform through the multi-axis controller; M2P upper computer software is arranged in the control panel, and the control panel is used for controlling the movement of the three-axis linkage platform through the multi-axis controller, so that the printing spray head is driven to move.

6. The multi-material mixing 3D printing and forming device according to claim 1, wherein the three-axis linkage platform comprises an X-axis guide rail, a Y-axis guide rail and a Z-axis guide rail; the X-axis guide rail, the Y-axis guide rail and the Z-axis guide rail are all electrically connected with the control system; the X-axis guide rail is connected with the Y-axis guide rail in a sliding manner; the Y-axis guide rail is connected with the Z-axis guide rail in a sliding manner.

7. The multi-material mixing 3D printing and forming device according to claim 6, wherein the three-axis linkage platform further comprises a first motor, a second motor and a third motor; the X-axis guide rail is electrically connected with the control system through the first motor; the Y-axis guide rail is electrically connected with the control system through the second motor; and the Z-axis guide rail is electrically connected with the control system through the third motor.

8. The multi-material mixing 3D printing and forming device as claimed in claim 1, wherein the micro flow channels are connected with the corresponding dispensing needle pressing cylinders through threads.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a multi-material mixing 3D printing and forming device.

Background

The 3D printing technique is an additive manufacturing technique that constructs objects by printing layer by layer. At present, the 3D printing technology is widely applied to the aspects of medical industry, industrial design, aerospace and the like.

At present, materials such as hydrogel, silicon rubber and the like have very wide application prospects in the aspects of biomedicine, material chemistry and the like. Compared with solid thermoplastic resin raw materials such as APL, ABS and the like, part of liquid materials such as hydrogel, silicon rubber and the like can still deform after being printed and formed under the excitation of external conditions, and the special property is paid attention to by people. Regarding the special properties of such liquid materials, it is also a very important subject to mix and print a plurality of materials and study their reactions under different external stimuli and their applications.

At present, most of 3D printers for printing the liquid hydrogel and the silicon rubber can only realize printing of a single material, and cannot realize mixed printing of various materials with different properties. For example, mixed printing of materials with different hardness and softness levels cannot be realized. A part of 3D printing equipment adopts the rotary objective table or rotary switching different shower nozzles to realize the printing of many materials. However, this switching method causes the printed material to oscillate when the printed material is switched, and the switching is completed by a mechanical device, which also has a problem of slow switching speed. When the material composition is large, the structure of the displacement table becomes very complicated, which causes problems such as high cost and long printing time of the 3D printer. And a part of printing equipment completes multi-material printing by designing a multi-channel spray head and adding a plurality of one-way valves in the spray head. However, the one-way valve is added in the spray head, so that the disadvantages exist, the size of the spray head is increased, and the cleaning of the spray head is complicated.

Disclosure of Invention

Based on this, it is necessary to provide a mixed 3D of many materials printing forming device to realize the many materials 3D of high viscosity materials such as aquogel, silicon rubber and print, avoid appearing the material mixing in the printing process or the problem such as the material change delays, promote printing speed, reduce the printing cost.

In order to achieve the purpose, the invention provides the following scheme:

the utility model provides a mixed 3D of many materials prints forming device, includes: the device comprises a control system, an air pressure driving system and an actuating mechanism; the control system is electrically connected with the actuating mechanism; the pneumatic driving system is communicated with the actuating mechanism through an air pipe;

the actuating mechanism comprises a three-axis linkage platform, a printing spray head and a plurality of dispensing needle pressing cylinders; the three-axis linkage platform is provided with the printing spray head and a plurality of dispensing needle pressing cylinders; the three-axis linkage platform is electrically connected with the control system; the printing nozzle comprises a nozzle body and a nozzle; the nozzle body is provided with the nozzle; a plurality of micro-flow channels are formed in the spray head body; one end of each micro-flow channel is communicated with the nozzle; the other end of each micro-flow channel is connected with a corresponding dispensing needle pressing cylinder; one dispensing needle pressing cylinder corresponds to one micro-flow channel; different printing materials are stored in each dispensing needle pressing cylinder; the pneumatic driving system is communicated with each dispensing needle pressing cylinder through a gas pipe; the pneumatic driving system is used for generating pneumatic pressure to push the printing materials in the dispensing needle pressing cylinder to enter the corresponding micro-flow channel, so that multi-material printing is realized.

Optionally, an annular groove is formed around the nozzle body; the annular groove is communicated with the printing spray head; the annular grooves are separated by partition plates to form a plurality of annular areas; a dispensing barrel is sleeved on one side of the annular groove, which is far away from the printing nozzle; the dispensing needle pressing cylinders are all arranged inside the dispensing barrel; the dispensing barrel is communicated with the air pressure driving system through an air pipe; the same printing material is placed in each of the annular areas; when the hollow tubular structure is printed, the pneumatic driving system is used for enabling the interior of the dispensing barrel to generate air pressure so as to push the printing materials in the annular areas to enter the nozzles.

Optionally, the pneumatic driving system includes an air compressor and a multi-split pneumatic valve; the air compressor is communicated with the multi-split air pressure valve; the multi-split air pressure valve is communicated with the dispensing needle pressing cylinder and the dispensing barrel through air pipes.

Optionally, each air pipe is provided with an electromagnetic valve; the electromagnetic valve is electrically connected with the control system; the control system is used for controlling the opening and closing of the electromagnetic valve.

Optionally, the control system includes a control panel and a multi-axis controller; the control panel is electrically connected with the three-axis linkage platform through the multi-axis controller; M2P upper computer software is arranged in the control panel, and the control panel is used for controlling the movement of the three-axis linkage platform through the multi-axis controller, so that the printing spray head is driven to move.

Optionally, the three-axis linkage platform includes an X-axis guide rail, a Y-axis guide rail and a Z-axis guide rail; the X-axis guide rail, the Y-axis guide rail and the Z-axis guide rail are all electrically connected with the control system; the X-axis guide rail is connected with the Y-axis guide rail in a sliding manner; the Y-axis guide rail is connected with the Z-axis guide rail in a sliding manner.

Optionally, the three-axis linkage platform further includes a first motor, a second motor, and a third motor; the X-axis guide rail is electrically connected with the control system through the first motor; the Y-axis guide rail is electrically connected with the control system through the second motor; and the Z-axis guide rail is electrically connected with the control system through the third motor.

Optionally, the microfluidic channel is connected with the corresponding dispensing needle pressing cylinder through a thread.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a multi-material mixing 3D printing and forming device, wherein an execution mechanism comprises a three-axis linkage platform, a printing nozzle and a plurality of dispensing needle pressing cylinders, wherein the printing nozzle and the plurality of dispensing needle pressing cylinders are arranged on the three-axis linkage platform; a plurality of micro-flow channels are arranged in the spray head body; a micro-flow channel is connected with a dispensing needle pressing cylinder; different printing materials are stored in the rubber needle pressing cylinders of each point; the pneumatic driving system is communicated with the rubber needle pressing cylinders of each point through air pipes; the air pressure driving system generates air pressure to push printing materials in the dispensing needle pressing cylinder to enter the corresponding micro-flow channels, and the multiple printing materials in the micro-flow channels are gathered at the nozzles, so that the printing of the multiple materials is realized. This print forming device has realized that many materials 3D of high viscosity materials such as aquogel, silicon rubber prints, can avoid printing the in-process and appear that the material mixes or the problem such as the material change delays, and printing speed is fast to simple structure prints with low costs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a structural diagram of a multi-material mixing 3D printing and forming apparatus according to an embodiment of the present invention;

fig. 2 is a three-dimensional perspective view of a print head according to an embodiment of the present invention;

FIG. 3 is a top view of a print head provided by an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a print head according to an embodiment of the present invention;

fig. 5 is an external structural view of a print head according to an embodiment of the present invention;

FIG. 6 is a schematic illustration of a hollow tubular structure printed in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of a printed multi-material hybrid structure according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of an apparatus for testing critical shear force of various materials according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an apparatus for verifying that no mixing occurs in a nozzle according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 1 is a structural diagram of a multi-material mixing 3D printing and forming apparatus according to an embodiment of the present invention.

Referring to fig. 1, the multi-material mixing 3D printing and forming apparatus of the present embodiment includes: the device comprises a control system, an air pressure driving system and an actuating mechanism; the control system is electrically connected with the actuating mechanism; the pneumatic driving system is communicated with the actuating mechanism through an air pipe.

The actuating mechanism comprises a three-axis linkage platform, a printing spray head 109 and a plurality of dispensing needle pressing cylinders 106; the three-axis linkage platform is provided with the printing nozzle 109 and a plurality of dispensing needle pressing cylinders 106; the three-axis linkage platform is electrically connected with the control system; the three-axis linkage platform is used as an actuating mechanism for printing a track, receives an electric signal of the control system, outputs mechanical motion, and changes the position of a deposited material.

Fig. 2 is a three-dimensional perspective view of a print head according to an embodiment of the present invention. Fig. 3 is a top view of a print head according to an embodiment of the present invention. Fig. 4 is a cross-sectional view of a print head according to an embodiment of the invention. Fig. 5 is an external structural view of a print head according to an embodiment of the present invention. Referring to fig. 2 to 5, the print head 109 includes a head body 1091 and nozzles 1092; the nozzle 1092 is arranged on the sprayer body 1091; a plurality of micro-flow channels 1093 are formed in the spray head body 1091; one end of each micro-flow channel 1093 is communicated with the nozzle 1092; the other end of each micro-flow channel 1093 is connected with the corresponding dispensing needle pressing cylinder 106; one dispensing needle pressing cylinder 106 corresponds to one microfluidic channel 1093; different printing materials are stored in each dispensing needle pressing cylinder 106, and a piston in each dispensing needle pressing cylinder extrudes the materials to flow out to a micro-flow channel 1093 of the printing spray head 109 under the action of driving air pressure; the printing nozzle 109 is used as an output end of printing materials, and the micro-flow channel 1093 and an outlet structure of the printing nozzle determine the quality of printed fibers; the pneumatic driving system is communicated with each dispensing needle pressing cylinder 106 through an air pipe; the pneumatic driving system is used for generating pneumatic pressure to push the printing materials in the dispensing needle pressing cylinder 106 to enter the corresponding micro-flow channels 1093, so that multi-material printing is achieved.

An annular groove 1094 is formed around the sprayer body 1091; the annular groove 1094 is communicated with the printing nozzle 109; the annular grooves 1094 are separated by partitions to form a plurality of annular regions; a dispensing barrel is sleeved on one side of the annular groove 1094 away from the printing nozzle 109; the dispensing needle pressing cylinders 106 are all arranged inside the dispensing barrel; the dispensing barrel is communicated with the air pressure driving system through an air pipe; the same printing material is placed in each of the annular areas; when printing a hollow tubular structure, the pneumatic driving system is used to generate air pressure inside the dispensing barrel to push the printing materials in the plurality of annular areas into the nozzles 1092. Compared with the traditional printing nozzle, the printing of a hollow tubular structure can be realized, for example, a slender hollow fiber tube can be printed, and in the aspect of biomedical experiments, the hollow structure has very important significance in the aspects of researching animal blood vessels, simulating cell living environment and the like.

As an alternative embodiment, the material used for the print head 109 may be a common plastic polymer, and may be manufactured by 3D printing. The print head 109 may be in the form of an axisymmetric rotational model having dimensions similar to those of a conventional micro print head 109. The sprayer with the microflow channel 1093 arranged in the middle and the annular groove space arranged at the edge has the advantage of integrated modularization. The housing design of the print head 109 may be a uniform shape, and different types of modular heads may be used for different applications.

As an alternative embodiment, the pneumatic driving system includes an air compressor 103 and a multi-split pneumatic valve 102; the air compressor 103 is communicated with the multi-split air pressure valve 102; the multi-split air pressure valve 102 is communicated with the dispensing needle pressing cylinder 106 and the dispensing barrel through air pipes. The air compressor 103 is used as an air pressure source for providing power and transmitting the generated air pressure into the multi-split air pressure valve 102; the one-drive-multiple air pressure valve 102 is used as an output end of an air pressure system, can adjust an output air pressure value, is connected to the dispensing needle pressing cylinder 106 through an air pipe, and can drive a piston in the dispensing needle pressing cylinder 106 to move by the output air pressure, so that printing materials pass through a micro-flow channel 1093 of the printing nozzle 109, and printing of flowing materials is achieved. The one-to-many pneumatic valve 102 may be a one-to-many precision pneumatic valve.

As an alternative embodiment, each air pipe is provided with an electromagnetic valve 105; the solenoid valve 105 is electrically connected with the control system; the control system is used for controlling the opening and closing of the electromagnetic valve 105. The solenoid valve 105 is an actuator for controlling material switching, and the received electric signal determines the on-off of an internal air path of the solenoid valve 105, so that the on-off of the driving air pressure is adjusted to influence the flowing state of the material. The on-off of the solenoid valve 105 is linked with the three-axis linkage platform, so that the deposition position of the printing material and the type of the printing material can be accurately controlled.

As an alternative embodiment, the control system includes a control panel 100 and a multi-axis controller 101; the control panel 100 is electrically connected with the three-axis linkage platform through the multi-axis controller 101; M2P upper computer software is arranged in the control panel 100, and the control panel 100 is used for controlling the three-axis linkage platform to move through the multi-axis controller 101, so as to drive the printing nozzle 109 to move. The control system takes a control panel 100 as a physical carrier, M2P upper computer software as an editor and is used for programming and outputting code signals of printing instructions, and the electric signals are transmitted to a multi-axis controller 101 through a data line; the multi-axis controller 101 is used as a driving signal input end of the printing actuator, plays a role in signal amplification, transmits a driving signal to a motor of the three-axis linkage platform through a data line to output corresponding mechanical motion, and simultaneously, some ports are connected with the electromagnetic valve 105 to transmit a signal for controlling the on-off of the driving air pressure.

As an alternative embodiment, the three-axis linkage platform includes an X-axis guide rail 107, a Y-axis guide rail 108, and a Z-axis guide rail 104; the X-axis guide rail 107, the Y-axis guide rail 108 and the Z-axis guide rail 104 are all electrically connected with the control system; the X-axis guide rail 107 is connected with the Y-axis guide rail 108 in a sliding manner; the Y-axis rail 108 is slidably coupled to the Z-axis rail 104.

As an optional implementation manner, the three-axis linkage platform further includes a first motor, a second motor, and a third motor; the X-axis guide rail 107 is electrically connected with the control system through the first motor; the Y-axis guide rail 108 is electrically connected with the control system through the second motor; the Z-axis rail 104 is electrically connected to the control system via the third motor.

As an alternative embodiment, the micro-flow channel 1093 is connected to the corresponding dispensing needle cylinder 106 by a screw.

As an optional implementation manner, the executing mechanism further includes a loading platform 110, where the loading platform 110 is disposed on the three-axis linkage platform, and when printing is completed, the printed object is taken down from the loading platform 110 for subsequent processing.

The mixed 3D of many materials of this embodiment prints forming device not only can realize that the many materials 3D of high viscosity materials such as aquogel, silicon rubber prints in order, avoid appearing the material mixing among the printing process or the problem such as the material change delays, can also realize that special construction prints (such as hollow tube etc. as shown in fig. 6), the object of printing out has elasticity and ductility of different degrees according to the proportion of adding the silicon rubber, the hollow fiber of printing out can be used to the research of interior blood flow, aspects such as cell culture environment, can also make the structure of another kind of material parcel of a material simultaneously. The wrapping layer is used as a protective layer, and the structure has wide application in the aspects of medicine and chemical reaction.

In practical application, the silicone rubber material with good biocompatibility is used as the printing material, and the material has good instantaneous formability and high viscosity. And maintains its own shape after being extruded from the print head 109. This is also the basis for hollow fiber formation. The particles of light sensitivity, magnetic sensitivity and the like are added into the material, so that different materials can be utilized to have different response degrees to external excitation, and the printed object has a plurality of functions. As shown in fig. 7. Where part (a) of fig. 7 shows an undeformed printed object, part (b) of fig. 7 shows a deformed printed object, and A, B in fig. 7 shows different printed materials, the two materials having different degrees of response to temperature, the a material being more sensitive to temperature and the deformation being greater.

The 3D printing is driven by air pressure, and the air compressor 103 provides pressure to a one-drive-many precision pneumatic valve, each outlet pressure of which is adjustable and independent for printing different materials. The back of the air pressure valve is connected with an electromagnetic valve 105, the electromagnetic valve 105 is controlled by a control system, the response frequency is 40K, and multiple printing materials can be switched at high speed. The control system has the function of integrally controlling the stepping/servo motor and the I/O signal, so that the three-axis linkage platform is linked with the electromagnetic valve 105, and the printing positions of various materials can be accurately controlled by programming through the control system at the PC end.

Printing a target object through three-dimensional modeling software such as SolidWorks to perform modeling, converting the target object into a G code by using slicing software CURA, copying the converted G code into a control system, and controlling the X-Y-Z three-axis motion of a printer nozzle; for multi-material printing, the G code can be edited in a control system of the PC end according to the specific requirements of a user. The instruction for controlling the electromagnetic valve 105 is added to the program part needing to switch the materials, and the material to be printed is determined according to the on-off state of each path of electromagnetic valve 105, so that the multi-material programmable 3D printing can be realized.

The print head 109 in practical application is manufactured by 3D printing. The print head 109 includes two (or more) feed ports and a discharge port. The feeding of each feeding hole is controlled by the on-off of the electromagnetic valve 105, and the electromagnetic valve 105 has high response speed and switching frequency, so that various materials can be printed quickly according to the response. The print head 109 is divided into an outer flow path (annular groove 1094) and an inner flow path (microflow path 1093). The material fed into the outer flow passage is silicone resin and the like, the inner flow passage is air, and the silicone resin is Dow Corning SE series (other substances can be doped), so that the material has good instantaneous formability and can keep the shape before being cured. And curing the printed object in a thermostat at the temperature of 100-180 ℃. The print head 109 may also print a hollow tubular structure as shown in fig. 6. There are multiple microfluidic channels 1093 if multiple substances are to be printed. The number of micro channels 1093 may vary depending on the amount of printing material, and two-channel micro channels are exemplified herein. When multi-material printing is performed, two micro flow channels 1093 are provided, and the print head 109 becomes a two-in one-out head. The feeding of the materials is controlled by controlling the on-off of the electromagnetic valve 105, so that the ordered printing of the two materials is realized. If more than two materials are required to be mixed for printing, only other types of designed spray heads need to be replaced.

The printing nozzle 109 of the embodiment applies fluid mechanics knowledge to solve the problems of slow material switching speed, material mixing and the like which may occur in multi-material printing. The printed high viscosity fluid is a bingham fluid among non-newtonian fluids. Bingham fluids are elastic solids that flow once a critical shear stress is exceeded. Therefore, the critical shear stress of each material can be tested by adopting the testing device, so that proper air pressure can be provided, and the problems of slow material switching and the like can be better solved. The test apparatus is shown in fig. 8. After the critical shear force of each material is determined, the apparatus shown in fig. 9 can be used to verify that the modular print head 109 designed in this embodiment can solve the problems of material mixing, backflow, and the like in material printing.

The multi-material mixing 3D printing and forming device of the embodiment has the following advantages:

1) compared with the traditional rotary object stage or rotary switching, the material switching speed is high; the problem of material mixing in the printing process is fundamentally solved by applying the hydrodynamic force mechanical content; for adding the check valve in printing shower nozzle 109, this embodiment has placed the check valve in front of the shower nozzle and has connect the department, and the whole size of shower nozzle can be done littleer, and the washing of shower nozzle is more convenient.

2) The modular spray head is more versatile. The print head 109 has multiple inlets to accommodate the different material flows. Meanwhile, the inlet channels with different widths control the flowing speed of the materials, the problem of inconsistent deposition rate caused by different material properties is solved, and multi-material mixed printing is realized; when proper air pressure is applied to the inner port and the outer port feeds, a special hollow structure can be printed; for some structures needing a protective layer, the feeding can be realized only by simultaneously feeding the ports in the outer port. For some multi-component materials to be wrapped, the print head 109 in this embodiment is replaced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.