CN114834034A - In-situ electronic control additive manufacturing device and process for functional composite material - Google Patents

In-situ electronic control additive manufacturing device and process for functional composite material Download PDF

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CN114834034A
CN114834034A CN202210550306.9A CN202210550306A CN114834034A CN 114834034 A CN114834034 A CN 114834034A CN 202210550306 A CN202210550306 A CN 202210550306A CN 114834034 A CN114834034 A CN 114834034A
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functional
printing
type metal
additive manufacturing
metal mesh
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CN114834034B (en
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曹毅
赵艺帆
杨浩
严圣超
孙海晁
李涤尘
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Xian Jiaotong University
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Xian Jiaotong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205—Means for applying layers
    • B29C64/209—Heads; Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Composite Materials (AREA)
  • Structural Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses an in-situ electronic control additive manufacturing device and a process for a functional composite material, wherein a printing nozzle with a nested structure is used, a plate-type metal mesh frame is arranged at the printing nozzle, an external high-voltage electrostatic generator is connected with the plate-type metal mesh frame and a printing substrate, a high-voltage electrostatic field and functional reinforcing materials such as fibers and the like generate interaction to control the orientation of the functional reinforcing materials such as the fibers and the like, the functional reinforcing materials such as the fibers and the like are conveyed to the surface of a printing substrate layer through the nozzle while printing layer by layer, the direction controllable distribution manufacturing of the functional reinforcing materials such as the fibers, carbon nanotubes, carbon fibers, graphene and the like in a 3D printing composite material is realized under the control of an external electric field, the technical essential defect of weak combination between 3D printing layers is overcome, and the oriented manufacturing of the 3D printing structure function of the composite material can be realized.

Description

In-situ electronic control additive manufacturing device and process for functional composite material
Technical Field
The invention relates to the technical field of composite material 3D printing, in particular to a device and a process for manufacturing a functional composite material in-situ electronic control additive.
Background
The material extrusion molding 3D printing can realize the integrated molding of the fiber reinforced composite material, and the fiber and other functional reinforcing materials (such as carbon fiber, graphene and the like) are added into the base material, so that the material has the advantages of mechanical property and functional characteristics (such as electromagnetic shielding) compared with the traditional polymer 3D printing. However, since the reinforcing materials such as fibers, carbon nanotubes and other functional fillers are physically mixed in the matrix material and are made into a wire suitable for a printing process by a screw, or are extruded by the screw to be directly printed and formed, the distribution and direction of the functional reinforcing materials such as fibers, carbon nanotubes, carbon fibers and graphene in the printing wire cannot be controlled in the printing process, so that the improvement of the performance of the functional reinforcing materials such as fibers on the interlayer of a printing sample piece is very limited, and the huge anisotropy of the composite material 3D printing technology in the Z direction and other directions is caused, which is one of the technical problems that the application of the composite material 3D printing technology in the engineering field is limited, and the controllable distribution manufacturing of the functional materials in the whole component cannot be realized.
Disclosure of Invention
The invention aims to provide an in-situ electronic control additive manufacturing device and process for a functional composite material, which aim to overcome the defects in the prior art, and can realize the large increase of interlayer strength, improve the mechanical property of a workpiece, realize the controllability of the orientation, gradient and position of a functional reinforcing material and improve the functional characteristics of the workpiece on the premise of not damaging the original structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an automatically controlled vibration material disk manufacturing installation of function combined material normal position, includes one set or the nested shower nozzle of many sets, the below of nested shower nozzle is provided with the printing base plate, nested shower nozzle is including the matrix material shower nozzle that is used for printing matrix material, and matrix material shower nozzle outside cover is equipped with the reinforcing layer intensity shower nozzle that is arranged in implanting matrix material with the function reinforcing material, matrix material shower nozzle exit outside cover is equipped with plate type metal net frame, just plate type metal net frame is located the exit position of reinforcing layer intensity shower nozzle, plate type metal net frame passes through the wire and is connected to high-voltage electrostatic generator, high-voltage electrostatic generator can realize the direction and the position that matrix material was implanted to the function reinforcing material with the cooperation of plate type metal net frame, high-voltage electrostatic generator and printing base plate all ground connection.
Further, the resistivity of the functional enhancement material in a standard state is less than 10 7 Ω·cm。
Further, the functional reinforcing material adopts conductive short fibers.
Further, the conductive short fiber is a metal-based conductive fiber, a polymer-based conductive fiber, a carbon-based conductive fiber or a composite conductive fiber.
Further, the high voltage electrostatic generator is provided with a control box for controlling the voltage change, and the voltage is used for determining the position and the direction of the function enhancing material, so that different enhancing effects are realized.
Further, the voltage value of the high-voltage electrostatic generator is 40-60 kV.
A functional composite material in-situ electric control additive manufacturing process includes that when a base material sprayer prints, a functional reinforcing material is in contact with a plate-type metal screen frame electrified at an outlet of a strength sprayer between reinforcing layers to be electrified, the functional reinforcing material is polarized in an electric field, charges with the same polarity as that of the plate-type metal screen frame are concentrated at one end far away from the plate-type metal screen frame, opposite charges are concentrated at one end close to the plate-type metal screen frame, when the functional reinforcing material is in contact with the plate-type metal screen frame, a conductive current is generated in the functional reinforcing material, the functional reinforcing material generates charges, the functional reinforcing material translates and rotates under the action of electrostatic force and has periodic vibration by controlling the external field strength, the size and the dielectric constant of the functional reinforcing material, the functional reinforcing material is implanted into a base material in a molten state according to a certain orientation, and the base material in a molten state is solidified to enable the functional reinforcing material to be fixed in the base material, when the next layer is printed, the next layer of molten matrix material completely covers and solidifies the functional reinforcing material, so that the layers are connected, in the printing process, the distance between the nested spray heads and the printing matrix is kept unchanged, and the matrix material and the functional reinforcing material are coaxially output and printed until the printed part is finished.
Furthermore, the functional reinforcing material adopts conductive short fibers, and the conductive short fibers are subjected to fiber opening treatment before use.
Furthermore, the high-voltage electrostatic generator is matched with a control box for controlling voltage change, the size of an electric field is controlled through the control box so as to control the orientation and the content of the functional reinforcing material, and the functional reinforcing materials with different orientations are implanted into the matrix material to form different gradients after being cured.
Compared with the prior art, the invention has the following beneficial technical effects:
1) the invention utilizes the interaction between the high-voltage electrostatic field and the fiber to control the orientation of the functional reinforcing material, so that the functional reinforcing material is implanted into the matrix material in a molten state according to a certain orientation, the connection between two layers of matrix materials is realized, the interlayer strength of the 3D printing workpiece is enhanced, the larger amplification of the interlayer strength can be realized on the premise of not damaging the original structure, the mechanical property of the workpiece is improved, the controllability of the fiber orientation, the gradient and the position is realized, and the functional characteristics of the workpiece are improved. 2) The functional reinforcing material vertically implanted into the molten matrix material can enhance the interlayer strength to the maximum extent, and different fibers can be printed at different parts with different orientations and different densities to realize different functional characteristics. 3) The invention can furthest retain the integrity of the original structural design and the controllability of the functional design. 4) The matrix material sprayer and the strength between the reinforcing layers are printed in parallel, so that the time is saved and the process is simple.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of an in-situ electronic control additive manufacturing device for functional composite materials;
FIG. 2 is a schematic diagram of the structure controlling different amounts of functional enhancement materials;
FIG. 3 is a schematic structural view of the control of different orientations of the functional enhancement material;
FIG. 4 is a schematic diagram of a structure for controlling different functional enhancing materials.
Wherein, 1, a base material spray head; 2. a base material; 3. printing a substrate; 4. grounding; 5. a high voltage electrostatic generator; 6. a plate-type metal mesh frame; 7. a functional enhancing material; 8. and enhancing the interlayer strength of the spray head.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention designs a spray head with a nested structure, realizes the coaxial output printing of a base material and a function enhancing material, a plate-shaped metal mesh frame 6 is arranged at the position of a printing nozzle, the plate-shaped metal mesh frame 6 is connected with a printing substrate 3 through an external high-voltage electrostatic generator 5, the high-voltage electrostatic field and the function enhancing material generate interaction to control the orientation of the function enhancing material, when the printing is carried out layer by layer, the functional reinforcing material is conveyed to the surface of the printing substrate layer, namely the layers of the upper layer and the lower layer, thereby playing the role of interlayer reinforcement, realizing the different density printing of different functional reinforcing materials at different parts through discontinuous voltage control and the change of the size and the dielectric constant of the functional reinforcing material, through the control of the magnitude of the applied voltage, the printing of the functional reinforcing material at different orientations of different parts is realized, and the control manufacturing is realized.
Examples
The 3D printing device of this embodiment includes one set of nested shower nozzle at least, and inside is base material shower nozzle 1, and the outside is intensity shower nozzle 8 between the reinforcing layer, and 8 exit of intensity shower nozzle between the reinforcing layer installs a board-shaped metal net frame 6, and board-shaped metal net frame 6 passes through the wire to be connected in the one end of high-voltage electrostatic generator 5, prints the ground connection of base plate 3, and function reinforcing material adopts electrically conductive short fiber in this embodiment. The specific method for enhancing the interlayer strength comprises the following steps: when the matrix material spray head 1 prints, the conductive short fiber is contacted with the charged plate type metal mesh frame 6 at the outlet of the enhanced interlayer strength spray head 8 to be charged, the conductive short fiber is polarized in an electric field, charges with the same polarity as that of the plate type metal mesh frame 6 are concentrated at one end far away from the plate type metal mesh frame 6, opposite charges are concentrated at one end close to the plate type metal mesh frame 6, when the conductive short fiber is contacted with the plate type metal mesh frame 6, certain conductive current is generated in the conductive short fiber due to the fact that the conductivity of the plate type metal mesh frame 6 is higher than that of the conductive short fiber 7, the conductive short fiber generates charges, the conductive short fiber has high straightness and flying property in the electric field, and the conductive short fiber moves, rotates and vibrates periodically under the action of electrostatic force by controlling the external field strength, the size and the dielectric constant of the conductive short fiber, the conductive short fibers are implanted into a matrix in a molten state near the matrix material 2 according to a certain orientation, the molten matrix is solidified to fix the conductive short fibers 7 in the matrix, when the next layer is printed, the next layer of molten matrix completely covers and solidifies the conductive short fibers 7 to realize the connection between layers, in the printing process, the distance between a printing nozzle and the printing matrix 3 is kept unchanged, the matrix material 2 and the conductive short fibers are coaxially output for printing, and the enhancement effect is unchanged along with the increase of the layer height until the printed product is finished, as shown in fig. 1.
The principle of the invention is as follows: the invention realizes the control of the direction and the position of the conductive short fiber by the interaction between the high-voltage electrostatic field and the conductive short fiber, the direction of the conductive short fiber determines the strength between layers, the conductive short fiber vertical to the plate-type metal net frame 6 has the maximum increase of the strength between the layers, the position of the fiber determines the combination between the layers, and different conductive short fibers are implanted in different positions to cause different functional characteristics. The conductive short fiber is assumed to be a slender ellipsoid, and the theoretical equation of translation of a single conductive short fiber in a high-voltage electrostatic field is as follows:
Figure BDA0003654748740000051
m is the weight of the conductive short fiber itself, F q Is the electric field force of the conductive short fiber in the electrostatic field, G is the self gravity of the conductive short fiber, F R V is the moving speed of the short conductive fiber, and is related to the external field intensity, factors of the short conductive fiber such as the type, length, thickness and air resistance coefficient of the short conductive fiber, and the momentum P of the short conductive fiber reflects the implantation depth of the short conductive fiber. The conductive short fibers also rotate around the fixed shaft in the electric field, and the equation of the orientation process is as follows: i θ "+ M R (θ′)+M P (θ)+M q (theta) ═ 0, I is the moment of inertia of the conductive staple fiber, theta 'is the angular acceleration, theta' is the angular velocity, theta is the direction of the half-axis of the length of the conductive staple fiber just after entering the electric field and the external electric field E 0 Angle between M R (theta') damping of a mediumMoment of force, M P (theta) is the rotational moment produced by the polarization charge, M q And (theta) is a rotation moment generated by induced charges, and an orientation process equation is related to factors of the conductive short fibers, the external field intensity and the air resistance coefficient.
Preferably, the base material showerhead 1 may print a material that is converted into a viscous state, such as wire, resin, ceramic suspension, etc.
Preferably, the conductive short fiber comprises metal-based conductive fiber, polymer-based conductive fiber, carbon-based conductive fiber, composite conductive fiber and the like, and the resistivity of the conductive short fiber is less than 10 under a standard state (the temperature is 20 ℃ and the relative humidity is 65 percent) 7 Omega cm fibers or other functional reinforcing materials.
Preferably, the conductive short fibers 7 should be subjected to a fiber opening process to reduce agglomeration.
Preferably, the orientation and implantation depth of the conductive short fibers are controlled by adjusting the applied field strength, the size and the dielectric constant of the conductive short fibers.
Preferably, the high-voltage electrostatic generator 5 is matched with a control box to control the change of voltage, the orientation and the content of the conductive short fibers are controlled by controlling the size of an electric field through the control box, and the conductive short fibers with different orientations are implanted into the base material 2 to form different gradients after being cured.
Preferably, the voltage value of the high voltage electrostatic generator 5 cannot be too large or too small, when the voltage value is lower than 30kV, the electric field intensity is too small, the resultant external force on the conductive short fiber is too small, so that the conductive short fiber can only float on the surface, when the voltage value is higher than 60kV, the conductive short fiber is ionized, a discharge phenomenon is generated, the implantation process is affected, and the unsafe performance of the experiment is caused by too large external voltage. Preferably, the applied voltage is 40kV, 50kV or 60 kV.
Preferably, the directional manufacturing of the structural function is realized by controlling the voltage of different areas and positions, the high-voltage electrostatic generator 5 controls the change of the voltage by a matching control box of the self, the content and the direction of the conductive short fiber are different according to the magnitude of the voltage, so that different enhancement effects are realized, different codes (similar to the codes in an automatic tool changer of a numerical control machine) on different types of the conductive short fiber in different hoppers are preset, different types of the conductive short fiber are selected and input according to instructions in the printing process, different types of the conductive short fiber are replaced in specific areas and positions according to the setting of the instructions, different functions are realized, and the directional manufacturing of the functions of the same part is realized, for example, the electromagnetic shielding function, the warping inhibiting function, the heat conducting function and the like can be realized. Through the control voltage and the hopper switching, the structure function oriented manufacturing of the same part with variable content (shown in figure 2), variable direction (shown in figure 3) and variable fiber (shown in figure 4) can be realized.
Preferably, two or more sets of nested nozzles can be adopted, and the strength between layers and the printing of multiple materials can be enhanced simultaneously by the two or more sets of nested nozzles.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.

Claims (9)

1. The in-situ electronic control additive manufacturing device for the functional composite material is characterized by comprising one or more nested spray heads, wherein a printing substrate (3) is arranged below each nested spray head, each nested spray head comprises a base material spray head (1) for printing a base material (2), a strength-enhancing interlayer spray head (8) for implanting a functional enhancing material (7) into the base material (2) is sleeved outside each base material spray head (1), a plate-type metal mesh frame (6) is sleeved outside an outlet of each base material spray head (1), the plate-type metal mesh frame (6) is located at an outlet of each strength-enhancing interlayer spray head (8), the plate-type metal mesh frame (6) is connected to a high-voltage electrostatic generator (5) through a lead, and the high-voltage electrostatic generator (5) and the plate-type metal mesh frame (6) are matched to realize the direction and the position of implanting the functional enhancing material (7) into the base material (2), the high-voltage electrostatic generator (5) and the printing substrate (3) are both grounded (4).
2. The in-situ electronic control additive manufacturing device for functional composite materials according to claim 1, wherein the resistivity of the functional enhancement material (7) is less than 10 under a standard state 7 Ω·cm。
3. The in-situ electronic control additive manufacturing device for the functional composite material as claimed in claim 2, wherein the functional reinforcing material (7) is conductive short fiber.
4. The in-situ electronic control additive manufacturing device for functional composite materials according to claim 3, wherein the conductive short fibers are metal-based conductive fibers, polymer-based conductive fibers, carbon-based conductive fibers or composite conductive fibers.
5. The in-situ electronic control additive manufacturing device for functional composite materials according to claim 1, wherein the high voltage static generator (5) is configured with a control box for controlling voltage variation, and the voltage is used for determining the position and the direction of the functional reinforcing materials so as to realize different reinforcing effects.
6. The in-situ electronic control additive manufacturing device for functional composite materials according to claim 5, wherein the voltage value of the high voltage electrostatic generator (5) is 40-60 kV.
7. An in-situ electric control additive manufacturing process for a functional composite material, which adopts the device of claim 1, and is characterized in that while a matrix material spray head (1) prints, a functional enhancement material (7) is in contact with a plate-type metal mesh frame (6) which is electrified at an outlet of an enhancement interlayer strength spray head (8) to be electrified, the functional enhancement material (7) is polarized in an electric field, charges with the same polarity as that of the plate-type metal mesh frame (6) are concentrated at one end far away from the plate-type metal mesh frame (6), opposite charges are concentrated at one end close to the plate-type metal mesh frame (6), when the functional enhancement material (7) is in contact with the plate-type metal mesh frame (6), conductive current is generated in the functional enhancement material (7), the functional enhancement material (7) generates charges, and the functional enhancement material translates under the action of electrostatic force through controlling the external field intensity, the size and the dielectric constant of the functional enhancement material, The printing ink is rotated and periodically vibrated, and is implanted into a matrix material in a molten state according to a certain orientation, the matrix material in the molten state is solidified to fix the functional reinforcing material (7) in the matrix material, when the next layer is printed, the next layer of matrix material in the molten state completely covers and solidifies the functional reinforcing material (7), so that the connection between the layers is realized, in the printing process, the distance between the nested spray head and the printing matrix (3) is kept unchanged, and the matrix material (2) and the functional reinforcing material (7) are coaxially output and printed until a printed product is finished.
8. The in-situ electric control additive manufacturing process for the functional composite material as claimed in claim 7, wherein the functional reinforcing material (7) is conductive short fibers, and the conductive short fibers are subjected to fiber opening treatment before use.
9. The in-situ electric control additive manufacturing process of the functional composite material as claimed in claim 8, wherein the high voltage electrostatic generator (5) is matched with a control box for controlling voltage variation, the size of an electric field is controlled by the control box to further control the orientation and content of the functional reinforcing material, and different gradients are formed after the functional reinforcing materials with different orientations are implanted into the matrix material (2) and cured.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111531870A (en) * 2020-04-23 2020-08-14 北京机科国创轻量化科学研究院有限公司 Additive manufacturing method of high-performance fiber-reinforced thermoplastic resin-based composite material
WO2022100726A1 (en) * 2020-11-16 2022-05-19 浙江大学 Microfiber high-energy implantation apparatus for manufacturing three-dimensional carbon fiber reinforced polymer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111531870A (en) * 2020-04-23 2020-08-14 北京机科国创轻量化科学研究院有限公司 Additive manufacturing method of high-performance fiber-reinforced thermoplastic resin-based composite material
WO2022100726A1 (en) * 2020-11-16 2022-05-19 浙江大学 Microfiber high-energy implantation apparatus for manufacturing three-dimensional carbon fiber reinforced polymer

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