CN107379539B - Continuous fiber prepreg 3D printing nozzle, 3D printer and printing method thereof - Google Patents
Continuous fiber prepreg 3D printing nozzle, 3D printer and printing method thereof Download PDFInfo
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- CN107379539B CN107379539B CN201710693358.0A CN201710693358A CN107379539B CN 107379539 B CN107379539 B CN 107379539B CN 201710693358 A CN201710693358 A CN 201710693358A CN 107379539 B CN107379539 B CN 107379539B
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- 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
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- 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
Abstract
The invention discloses a 3D printing nozzle for continuous fiber prepreg, a 3D printer and a printing method thereof, wherein the 3D printing nozzle comprises a rotating mechanism, a fixed support, a heat dissipation device, a heating device, a guide channel and press wheels, the heat dissipation device is threaded at the lower end of the fixed support, the heating device is connected to the lower end of the heat dissipation device, the guide channel sequentially penetrates through the fixed support, the heat dissipation device and the heating device and is used for supplying the prepreg downwards, and the press wheels are arranged at the lower end of the heating device, distributed on two sides of the guide channel and used for compacting the molten continuous fiber prepreg; the fixed support is provided with a feeding device, a shearing mechanism and a shearing and re-feeding device, the feeding device and the shearing and re-feeding device are used for providing downward feeding power, and the shearing mechanism is used for shearing the prepreg as required. The invention realizes the 3D printing of the continuous fiber prepreg, improves the overall strength and the interlaminar shear strength of the nonmetal 3D printing, and reduces the technical difficulty of the forming of the continuous fiber prepreg structural member.
Description
Technical Field
The invention belongs to the technical field of continuous fiber prepreg 3D printing, and particularly relates to a continuous fiber prepreg 3D printing spray head, a 3D printer and a printing method thereof.
Background
The 3D printing technology has the advantages of increasing materials, reducing raw material waste and saving cost in the processing process. The 3D printing technology combines different disciplines such as material, computer, control, etc., and is a technology for building an object by bonding different materials layer by layer based on a digital model file. According to the material division, the 3D printing technology can be divided into metal 3D printing and nonmetal 3D printing, and nonmetal materials are mainly thermoplastic resin materials. Due to the relationship of raw materials, the strength of the non-metal 3D printed part is not high, and the part cannot be directly used, which is one of the reasons why no industrial-grade 3D printed non-metal product exists.
Compared with the traditional thermosetting material, the thermoplastic resin-based continuous fiber composite material has the advantages of high heat resistance, good toughness, high bending strength, good interlaminar shear performance, low water absorption, reusability and the like, thereby being widely applied to the fields of aviation, aerospace, automobiles, military affairs, medical treatment and the like. The thermoplastic resin-based continuous fiber composite material is usually processed into a continuous fiber prepreg, and then the continuous fiber prepreg is formed on a die by driving a laying head through a multi-degree-of-freedom mechanical arm, but the method has high cost and high technical requirements.
Many scientific researchers at home and abroad make great efforts for improving the strength of nonmetal 3D printing, most of the efforts are to improve a fused deposition molding 3D printing nozzle, continuous fibers and thermoplastic consumables are presoaked at the printing nozzle and then are printed and molded, but the method causes poor resin fluidity because the heating temperature of thermoplastic resin cannot be too high, and causes low presoaking degree of the continuous fibers because of short presoaking time, low pressure and the like, the strength of parts printed and molded is not substantially improved, the waste of the continuous fibers is caused, and the application and development of the method in the field of 3D printing are greatly limited.
Disclosure of Invention
In order to solve the defects that the strength of the nonmetal 3D printed part is low and the strength of the existing continuous fiber reinforced nonmetal 3D printed part is not obviously improved, the invention provides the continuous fiber prepreg 3D printing nozzle and the 3D printing and printing method thereof.
The technical scheme of the invention is as follows:
A3D printing nozzle for continuous fiber prepreg comprises a fixed support, a heat dissipation device, a heating device, a continuous fiber prepreg guide channel and a plurality of press wheels, wherein the heat dissipation device is in threaded connection with the lower end of the fixed support, the heating device is in threaded connection with the lower end of the heat dissipation device, the guide channel sequentially penetrates through the fixed support, the heat dissipation device and the heating device and is used for supplying the continuous fiber prepreg downwards, and the press wheels are arranged at the lower end of the heating device and are distributed on two sides of the guide channel;
the fixed support is provided with a feeding device, a shearing mechanism and a shearing re-feeding device, and the shearing mechanism is arranged between the feeding device and the shearing re-feeding device;
the feeding device and the shearing and re-feeding device comprise driving gears and pulleys, and the driving gears and the pulleys are arranged between the guide channels and provide power for downwards conveying the continuous fiber prepreg; the shearing mechanism comprises a return spring, a reset pressing block, a shearing blade and an air cylinder, wherein the fixed support at one side of the guide channel is fixedly connected with the return spring, the other end of the return spring is fixed on the reset pressing block, the shearing blade is arranged at the other side of the guide channel, and the air cylinder provides shearing force for the shearing blade.
Preferably, the fixed support at two sides of the guide channel is provided with a groove for arranging the feeding device or the shearing and re-feeding device.
Preferably, the two driving gears are arranged on the groove on the same side of the guide channel and are synchronously driven by a synchronous belt arranged on the fixed support, and the pulley is arranged on the groove on the other side of the guide channel.
Preferably, the fixed support is provided with a space for compressing the reset pressing block (namely, a space where the reset spring is located), and the space extends from the side wall of the fixed support and crosses the guide channel to the side wall of the fixed support on the other side.
Preferably, the return spring is arranged on the side wall of the space; and a gap through which the shearing blade passes is arranged on the other side wall of the space.
Preferably, the heating device comprises a heating jacket and a heat transfer alloy pipe, the heat transfer alloy pipe is positioned on the inner side of the heating jacket, and the inner side of the heat transfer alloy pipe is provided with a Teflon pipe for reducing friction.
Preferably, the press wheel is provided with the lower end of the heating device through a through shaft.
Preferably, the printing device further comprises a rotating mechanism, and the steering mechanism is used for adjusting the printing path of the 3D printing nozzle. The invention also discloses a 3D printer which comprises the 3D printing nozzle.
The invention also discloses a printing method using the 3D printing nozzle, which comprises the following steps:
(1) installing the 3D printing nozzle of claims 1-8 on a 3D printer, wherein continuous fiber prepreg passes through the guide channel, extends out of the pinch roller by about 2-8 mm, and then provides a control power supply for the heating device, the feeding device and the cutting and re-feeding device;
(2) under the synchronous supply of the feeding device and the cutting re-feeding device, the cutting mechanism passes through, and at the moment, the cutting mechanism does not receive a control signal and does not act; then the solid state is kept after the heat dissipation device is penetrated; the continuous fiber prepreg enters the heating system, thermoplastic resin in the continuous fiber prepreg is heated to be in a bonding molten state under the heating, and the molten continuous fiber prepreg is compacted on a printing bottom plate or a lower layer of continuous fiber prepreg according to a required path under the action of the pressing wheel;
(3) when the direction of a printing path of the continuous fiber prepreg is changed, the printing nozzle rotates under the action of the rotating mechanism, so that the rotating direction of the pressing wheel is always parallel to the printing path;
(4) when the continuous fiber prepreg needs to be cut, the air cylinder is enabled to act under the action of a control signal and then the continuous fiber prepreg is transmitted to the cutting blade, the cutting blade cuts the continuous fiber prepreg under the matching of the reset spring and the reset pressing block, then the cutting blade retracts, and the continuous fiber prepreg continues to move under the action of the cutting re-feeding device; and (3) repeating the rotating step (3) and the shearing action (4) as required during printing, and finishing the printing of the high-strength composite material part.
Compared with the prior art, the invention has the following beneficial effects:
according to the 3D printing nozzle for the continuous fiber prepreg, the feeding device and the shearing re-feeding device are arranged, so that the continuous fiber prepreg is fed downwards for printing; a cutting mechanism is arranged between the feeding device and the cutting and re-feeding device, so that parts with complex shapes can be better printed by cutting as required at any time, a steering mechanism is arranged on the printing nozzle, the printing direction and the printing precision of continuous fibers can be accurately controlled, and in addition, a pinch roller is arranged at the outlet of the heating device, so that the interlayer shearing strength of 3D printing is improved;
the 3D printing method of the continuous fiber prepreg can realize 3D printing of the continuous fiber prepreg, greatly improve the strength of the existing nonmetal 3D printing part, and solve the problems of low strength improvement, continuous fiber waste and the like caused by insufficient impregnation degree of the existing 3D printing of the continuous fiber.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a schematic cross-sectional view of a continuous fiber prepreg of the present invention;
FIG. 2 is a schematic structural diagram of a 3D printing nozzle for continuous fiber prepregs according to the present invention;
FIG. 3 is a cross-sectional view of a 3D printing head for continuous fiber prepreg according to the present invention;
fig. 4 is a cross-sectional view of a 3D printing head for continuous fiber prepreg according to the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In practice, the invention will be understood to cover all modifications and variations of this invention provided they come within the scope of the appended claims.
For a better illustration of the invention, the following detailed description of the invention is given in conjunction with the accompanying drawings.
As shown in fig. 1, the continuous fiber prepreg 11 adopted in the present invention is a continuous fiber reinforced thermoplastic resin-based composite material, the cross-sectional shape of which is circular, and the continuous fiber prepreg comprises continuous fibers 111 and thermoplastic resin 112, wherein the continuous fibers 111 are one of fibers such as carbon fibers, glass fibers or kevlar fibers, or a fiber bundle formed by combining several fibers; the thermoplastic resin 112 is one of polylactic acid, ABS, nylon, PEEK, or other thermoplastic resins.
As shown in fig. 2 to 4, the continuous fiber prepreg 3D printing nozzle of the present invention can be installed on a common FDM type 3D printer, so that the continuous fiber prepreg 3D printing nozzle can move as required during printing, the 3D printing nozzle includes a fixed support 1, a heat dissipation device 7, a heating device 8, a continuous fiber prepreg guide channel 2 and two press rollers 10, the heat dissipation device 7 is connected to the lower end of the fixed support 1 by screw threads, the heating device 8 is connected to the lower end of the heat dissipation device 7 by screw threads, the guide channel 2 sequentially passes through the fixed support 1, the heat dissipation device 7 and the heating device 8 for supplying a continuous fiber prepreg 11 downwards, the press rollers 10 are disposed at the lower end of the heating device 8 and are distributed at two sides of the guide channel 2, for compacting the molten continuous fiber prepreg 11, the present invention preferably arranges the press wheel 10 at the lower end of the heating device 8 through a through-mandrel;
the fixed support 1 is provided with a feeding device 3, a shearing mechanism 4 and a shearing and re-feeding device 5, and the shearing mechanism 4 is arranged between the feeding device 3 and the shearing and re-feeding device 5;
the feeding device 3 and the shearing and re-feeding device 5 comprise a driving gear 31(51) for providing power and a driven pulley 32(52) for providing a guiding function, the driving gear 31(51) and the pulley 32(52) are arranged between the guiding channels 2 and are used for providing power for conveying the continuous fiber prepregs 11 downwards, the driving gear 31(51) obtains continuous power through a stepping motor and is matched with the driven pulley 32(52) to feed the continuous fiber prepregs 11 downwards according to requirements, and therefore the shearing and re-feeding device and the feeding device 3 synchronously move through a synchronous belt 6 to enable the continuous fiber prepregs 11 to obtain the downwards power.
The shearing mechanism 4 comprises a return spring 42, a return pressing block 45, a shearing blade 43 and an air cylinder 44, wherein the return spring 42 is fixedly connected to the fixed support 1 on one side of the guide channel 2, the other end of the return spring 42 is fixed to the return pressing block 45, the shearing blade 43 is arranged on the other side of the guide channel 2, and the air cylinder 44 provides sufficient shearing force for shearing the continuous fiber prepreg 11.
In order to arrange the feeding device 3, the cutting mechanism 4 and the cutting and re-feeding device 5 on the fixed support 1, but not limited to this, the present embodiment is provided with a groove 12 for arranging the feeding device 3 or the cutting and re-feeding device 5 on the fixed support 1 at both sides of the guiding channel 2, two driving gears 31(51) are arranged on the groove 12 at the same side of the guiding channel 2 and are driven synchronously by a timing belt 6 arranged on the fixed support 1, and the pulley 32(52) is arranged on the groove 12 at the other side of the guiding channel 2.
In this embodiment, a space (i.e., a position where the return spring 42 is located) for compressing the return press block 45 is provided on the fixed support 1 between the feeding device 3 and the shearing and re-feeding device 5, the space extends from the sidewall of the fixed support 1 and crosses the guide channel 2 to the other side of the sidewall of the fixed support 1, so as to ensure that the return spring 42 has a sufficient compression space during the shearing process, thereby ensuring that the continuous carbon fiber prepreg 11 is completely sheared, the upper end of the fixed support 1 is the shearing inlet 41 and the lower end is the shearing outlet 46, the sidewall of the shearing inlet 41 is provided with a boss, the height of the boss should be as close to the feeding device 3 as possible, but the rotation of the driving gear 31 and the driven pulley 32 is not affected.
The return spring 42 is arranged on the side wall of the space; a slit through which the cutting blade 43 passes is provided on the other side wall of the space. The shearing blade 43 is a hard alloy steel blade, and the air cylinder 44 is a micro air cylinder, and provides sufficient shearing force to shear the continuous fiber prepreg 11.
The heat dissipation device 7 adopts fin heat dissipation fins to dissipate heat, a boss is arranged on the side wall of the fin heat dissipation fins, which is close to the guide channel 2, the boss is just opposite to the cutting re-feeding device 5, and the height of the boss should be as close to the re-feeding device 5 as possible on the premise that the movement of the driving gear 51 and the pulley 52 is not influenced.
The heating device 8 comprises a heating jacket 81 and a heat transfer alloy pipe 83, wherein the heat transfer alloy pipe 83 is positioned at the inner side of the heating jacket 81 and is coated by the heating jacket 81, a temperature sensor 82 is arranged between the heating jacket 81 and the heat transfer alloy pipe 83, and a Teflon pipe 9 is arranged at the inner side of the heat transfer alloy pipe 83 for reducing friction.
The heating jacket 81 can be one of a heating pipe, ceramic heating or electromagnetic heating, etc., the temperature sensor 82 can be a temperature sensing mode such as a thermistor or a thermocouple, etc., and the whole heating process is closed-loop control.
The invention discloses a printing method using the 3D printing nozzle, which comprises the following steps:
(1) installing the 3D printing nozzle on an FDM type 3D printer, enabling continuous fiber prepreg 11 to penetrate through the guide channel 2 and extend out of the pinch roller 10 by about 2-8 mm, and then providing a control power supply for the heating device 8, the feeding device 3 and the shearing re-feeding device 5;
(2) under the synchronous supply of the feeding device 3 and the cutting re-feeding device 5, the cutting mechanism 4 passes through, and at the moment, the cutting mechanism 4 does not receive a control signal and does not act; then passes through the heat dissipation device 7 to keep a solid state; the continuous fiber prepreg enters the heating system 8, under the heating, the thermoplastic resin in the continuous fiber prepreg is heated to be in a molten state capable of being bonded, and the molten continuous fiber prepreg 10 is compacted on a printing bottom plate or a lower layer of continuous fiber prepreg according to a required path under the action of the pressing wheel 10;
(3) when the direction of the printing path of the continuous fiber prepreg is changed, the printing nozzle rotates under the action of the rotating mechanism, so that the rotating direction of the pressing wheel 10 is always parallel to the printing path;
(4) when the continuous fiber prepreg needs to be cut, the air cylinder 44 is operated under the action of a control signal and then transmitted to the cutting blade 43, and the cutting blade 43 cuts the continuous fiber prepreg 11 which is kept in a solid state at the cutting mechanism 4 under the matching of the return spring 42 and the return pressing block 45; then the cutting blade 43 retracts, the continuous fiber prepreg 11 returns to the original advancing direction under the action of the return spring 42, passes through the cutting outlet 46 and continues to advance under the action of the cutting re-feeding device 5;
(5) in the 3D printing process, continuously printing the composite material part layer by repeating the movement of the step (2) in the printing nozzle according to the path under the movement of the printer; when a position needing to be steered is met, repeating the step (3), and driving the whole printing nozzle to rotate by a certain angle by utilizing the rotation of an external rotating mechanism; and (4) when meeting the position where the continuous fibers need to be cut, repeating the action in the step (4) to cut the continuous fibers.
The 3D printing method of the continuous fiber prepreg can greatly improve the strength of the existing nonmetal 3D printing, and the cost of processing the continuous fiber prepreg by using a mechanical arm can be reduced by using the 3D printing method to construct the continuous fiber reinforced thermoplastic resin matrix composite part, so that the technical difficulty of processing the continuous fiber composite part is reduced; meanwhile, the 3D printing nozzle for the continuous fiber prepreg is provided with the shearing mechanism, the steering mechanism and the pressing wheel, so that the printing direction of the continuous fiber can be more accurately controlled, parts with complex shapes can be better printed, and the interlayer shearing strength of 3D printing is increased.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The 3D printing nozzle for the continuous fiber prepreg is characterized by comprising a fixed support, a heat dissipation device, a heating device, a continuous fiber prepreg guide channel and a plurality of press wheels, wherein the heat dissipation device is in threaded connection with the lower end of the fixed support;
the fixed support is provided with a feeding device, a shearing mechanism and a shearing re-feeding device, and the shearing mechanism is arranged between the feeding device and the shearing re-feeding device;
the feeding device and the shearing and re-feeding device comprise driving gears and pulleys, and the driving gears and the pulleys are arranged between the guide channels and provide power for downwards conveying the continuous fiber prepreg; the shearing mechanism comprises a return spring, a reset pressing block, a shearing blade and an air cylinder, wherein the fixed support at one side of the guide channel is fixedly connected with the return spring, the other end of the return spring is fixed on the reset pressing block, the shearing blade is arranged at the other side of the guide channel, and the air cylinder provides shearing force for the shearing blade.
2. The continuous fiber prepreg 3D printing nozzle according to claim 1, wherein grooves for arranging the feeding device or the shearing and re-feeding device are formed in the fixed support at two sides of the guide channel.
3. The continuous fiber prepreg 3D printing nozzle as claimed in claim 2, wherein the two driving gears are disposed on the grooves on the same side of the guiding channel and are driven synchronously by a synchronous belt disposed on the fixing support, and the pulley is disposed on the groove on the other side of the guiding channel.
4. The continuous fiber prepreg 3D printing nozzle according to claim 1, wherein a space for compressing the reset pressure block is formed in the fixed support, and the space extends from a side wall of the fixed support and crosses the guide channel to the side wall of the fixed support on the other side.
5. The continuous fiber prepreg 3D printing nozzle according to claim 4, wherein the return spring is arranged on a side wall of the space; and a gap through which the shearing blade passes is arranged on the other side wall of the space.
6. The continuous fiber prepreg 3D printing nozzle according to claim 1, wherein the heating device comprises a heating jacket and a heat transfer alloy pipe, the heat transfer alloy pipe is located on the inner side of the heating jacket, and a Teflon pipe is arranged on the inner side of the heat transfer alloy pipe and used for reducing friction.
7. The continuous fiber prepreg 3D printing nozzle according to claim 1, wherein the pressing wheel is provided with a lower end of the heating device through a through-mandrel.
8. The continuous fiber prepreg 3D printing nozzle according to claim 1, further comprising a rotating mechanism for adjusting a printing path of the 3D printing nozzle.
9. A3D printer, characterized by comprising the 3D printing nozzle of any one of claims 1-8.
10. A printing method using the 3D printing nozzle as claimed in any one of claims 1 to 8, comprising the steps of:
(1) installing the 3D printing nozzle of any one of claims 1 to 8 on a 3D printer, wherein continuous fiber prepreg passes through the guide channel, extends out of the pinch roller by 2-8 mm, and then provides power for the heating device, the feeding device and the shearing and re-feeding device;
(2) under the synchronous supply of the feeding device and the cutting re-feeding device, the cutting mechanism passes through, and at the moment, the cutting mechanism does not receive a control signal and does not act; then the solid state is kept after the heat dissipation device is penetrated; the continuous fiber prepreg enters the heating system, thermoplastic resin in the continuous fiber prepreg is heated to be in a bonding molten state under the heating, and the molten continuous fiber prepreg is compacted on a printing bottom plate or a lower layer of continuous fiber prepreg according to a required path under the action of the pressing wheel;
(3) the 3D printing nozzle also comprises a rotating mechanism, when the direction of a printing path of the continuous fiber prepreg is changed, the printing nozzle rotates under the action of the rotating mechanism, so that the rotating direction of the pressing wheel is always parallel to the printing path;
(4) when the continuous fiber prepreg needs to be cut, the air cylinder is enabled to act under the action of a control signal and then the continuous fiber prepreg is transmitted to the cutting blade, the cutting blade cuts the continuous fiber prepreg under the matching of the reset spring and the reset pressing block, then the cutting blade retracts, and the continuous fiber prepreg continues to move under the action of the cutting re-feeding device; and (3) repeating the rotating step (3) and the shearing action (4) as required during printing, and finishing the printing of the high-strength composite material part.
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| CN201710693358.0A CN107379539B (en) | 2017-08-14 | 2017-08-14 | Continuous fiber prepreg 3D printing nozzle, 3D printer and printing method thereof |
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| CN201710693358.0A CN107379539B (en) | 2017-08-14 | 2017-08-14 | Continuous fiber prepreg 3D printing nozzle, 3D printer and printing method thereof |
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| CN107825699A (en) * | 2017-11-27 | 2018-03-23 | 西北工业大学（张家港）智能装备技术产业化研究院有限公司 | 3D printer printing head |
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| CN108943719B (en) * | 2018-08-02 | 2021-10-29 | 淮北特旭信息科技有限公司 | A3D printer for printing carbon fiber |
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| US20200238603A1 (en) * | 2019-01-25 | 2020-07-30 | Continuous Composites Inc. | System for additively manufacturing composite structure |
| JP7388075B2 (en) * | 2019-02-18 | 2023-11-29 | 富士フイルムビジネスイノベーション株式会社 | modeling equipment |
| CN110667114B (en) * | 2019-10-17 | 2022-01-28 | 吉林大学 | Integrated printing device and printing method for continuous fiber embedded material |
| CN110901051B (en) * | 2019-10-22 | 2022-03-15 | 北京机科国创轻量化科学研究院有限公司 | Continuous fiber composite material 3D printer head and universal laminating device thereof |
| CN111497225A (en) * | 2020-04-03 | 2020-08-07 | 江南大学 | Spray head, printer and printing method suitable for continuous fiber reinforced composite material |
| CN113510484B (en) * | 2021-04-20 | 2022-12-13 | 南昌大学 | Additive and subtractive composite manufacturing system |
| CN113119446B (en) * | 2021-05-25 | 2022-04-22 | 四川大学 | Continuous fiber reinforced composite 3D printing head with self-cleaning function |
| CN113320151B (en) * | 2021-06-08 | 2023-03-03 | 广西民族大学 | 3D printing head and printing method of continuous fiber reinforced resin composite material |
| CN113752545B (en) * | 2021-09-23 | 2023-02-28 | 江南大学 | Fuse deposition type 3D printing wire material cross shearing equipment and operation method |
| CN114474712B (en) * | 2022-01-18 | 2022-10-18 | 西安交通大学 | Continuous fiber reinforced composite material efficient high-speed 3D printing head and using method thereof |
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| CN116198111A (en) * | 2023-01-05 | 2023-06-02 | 南京航空航天大学 | High-temperature melt extrusion continuous fiber/resin double-nozzle quick-change 3D printing head |
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