CN112497740A - photocuring-FDM combined material printer nozzle and working method thereof - Google Patents
photocuring-FDM combined material printer nozzle and working method thereof Download PDFInfo
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- CN112497740A CN112497740A CN202011169030.7A CN202011169030A CN112497740A CN 112497740 A CN112497740 A CN 112497740A CN 202011169030 A CN202011169030 A CN 202011169030A CN 112497740 A CN112497740 A CN 112497740A
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- spray head
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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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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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
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
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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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
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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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
Abstract
The invention discloses a photocuring-FDM combined material printer nozzle and a working method thereof, wherein the photocuring-FDM combined material printer nozzle comprises an inner nozzle and an outer nozzle, the outer nozzle is communicated with a slurry cavity, an ultraviolet lamp is arranged below the slurry cavity, and the inner nozzle is arranged in the slurry cavity; a wire guide pipe is arranged in the inner spray head, and the heater is wrapped outside the wire guide pipe; the power unit is fixedly connected with the spray head and provides power for the spray head. The invention can combine and print the wire material and the slurry material, and print the parts with different materials on the surface and inside, thereby breaking through the limitation of the traditional single material.
Description
Technical Field
The invention relates to the technical field of 3D printing devices, in particular to a photocuring-FDM combined material printer nozzle and a working method thereof.
Background
Fused Deposition Modeling (FDM) is to melt printing consumables through a high-temperature spray head and accumulate layer by layer according to printed tracks to finally produce a three-dimensional model. The material is heated and melted in the spray head, the spray head moves along the section outline and the filling track of the part, meanwhile, the melted material is extruded out, the material is rapidly solidified and is bonded with the surrounding material, each layer sheet is formed by stacking the upper layer, and the upper layer plays a role in positioning and supporting the current layer. The 3D printing method has the advantages of simplicity, mature process, lower cost and the like. The technology can print a plurality of materials, and common materials comprise organic polymers, such as ABS, PLA, PC and other materials; the wire may be a wire containing ceramic powder or a wire containing metal. The technology is widely applied to the fields of prototype development, biomedical treatment, artwork display and the like.
The principle of the photo-curing molding is that a polymer monomer and a prepolymer form a photoinitiator (photosensitizer), which is (szg-3d) to cause a polymerization reaction after being irradiated by UV light (for example, 250-405nM wavelength), thereby completing the curing.
In the existing 3D printing, if the inner part and the surface layer of a printed material are made of different materials, the printing needs to be carried out in a grading way, and the printing efficiency is low.
Chinese application publication No. CN 111032251 a, specifically 2020, 4.17, discloses a 3D printer, which mixes metal powder in two feeders to make different parts of an article have different characteristics (such as strength, granularity, electrical conductivity, thermal conductivity, corrosion resistance, hardness, wear resistance, crack deflection or energy absorption characteristics), but the used material is a combination of metal powder or a combination of metal powder and non-metal material, and does not solve the problems of organic matter and ceramic combined printing, nor the intrinsic difference of the printed material inside and surface layer materials.
Disclosure of Invention
The invention provides a photocuring-FDM combined material printer nozzle and a working method thereof, aiming at solving the problem that the materials of the inner part and the surface layer of a part in the prior art are different and need to be printed in a grading way.
The technical scheme of the invention is realized as follows:
a spray head of a photocuring-FDM combined material printer comprises a spray head and a power unit, wherein the spray head comprises an inner spray head and an outer spray head, the outer spray head is communicated with a slurry cavity, the slurry cavity is a hollow cavity, an ultraviolet lamp is arranged below the slurry cavity and corresponds to the spraying position of the outer spray head, and the inner spray head is arranged in the slurry cavity; a wire guide pipe is arranged in the inner spray head, and the heater is wrapped outside the wire guide pipe; the power unit is fixedly connected with the spray head and provides power for the spray head.
Preferably, the inner spray head penetrates through the slurry cavity and extends into the outer spray head, and the nozzles of the inner spray head correspond to the nozzles of the outer spray head.
Preferably, a supporting beam for supporting and connecting is arranged between the inner spray head and the outer spray head. A supporting beam is arranged at the lower side of the inner spray head to strengthen the fixing effect.
Preferably, the number of the support beams is 3, and the angles of two adjacent support beams in the plane are different by 120 degrees. The method can achieve the most stable supporting effect under the condition of using the least supporting beam materials.
Preferably, a temperature sensor is arranged outside the heater, and the temperature sensor is a resistance type heater and/or an inductance type heater. Aiming at the polymer composite material, the heating temperature ranges from 150 ℃ to 300 ℃; for ceramic materials, the temperature of heating is between 1000 ℃ and 1500 ℃; for metal materials, the heating temperature is between 700 ℃ and 1500 ℃, and the heating mode of the heater is inductive heating.
Preferably, the power unit comprises a wire guide and a pneumatic transmission device, the wire guide is fixedly connected above the wire guide pipe, and the pneumatic transmission device is connected with the slurry cavity through a pipeline. The wire guide device is arranged right above the wire guide pipe to provide downward transmission power for the wires, and the air pressure transmission device provides downward injection power for the slurry in the slurry cavity through pressurization.
Preferably, the pipeline is respectively provided with an air pressure sensor and an air pressure meter for measuring and displaying the air pressure state of the pipeline, and the air pressure sensor and the air pressure meter are electrically connected with the air pressure transmission device.
Preferably, the wire guide tube is filled with wires which are one or more of high polymer materials, ceramic materials and metal materials.
Preferably, the slurry chamber contains a slurry, which is a ceramic slurry and/or a polymer slurry containing a photosensitive resin.
The invention also provides a working method of the photocuring-FDM combined material printer nozzle, which comprises the following steps:
step 1: drawing a three-dimensional model by using three-dimensional drawing software, selecting the slice thickness according to the printing precision, and setting the slice thickness as a parameter for storage;
step 2: filling the silk material and the slurry into a silk guide pipe and a slurry cavity respectively, and guiding printing parameters into a printer;
and step 3: the heater preheats the nozzle, and meanwhile, the heating temperature of the heater is set according to the difference of printing materials; turning on an ultraviolet lamp to prepare for printing;
and 4, step 4: printing is started, the power unit starts to work, and the air pressure transmission device of the power unit provides pressure for the slurry cavity to enable the slurry to be sprayed out of the outer spray head; the wire guider of the power unit provides power for the wires, and the wires are downwards transmitted and are sprayed out from the inner spray head after being heated and melted by the heater;
and 5: the printing system simultaneously detects whether the wire outlet rate of the inner spray head and the pulp outlet rate of the outer spray head meet the synchronous requirement, and when the requirements are not met, the wire guide and the pneumatic transmission device are adjusted until the working rates of the inner spray head and the outer spray head are just proper, so that the printing requirement is met;
step 6: and (3) automatically cooling and forming the wire, forming the slurry after the slurry is irradiated by an ultraviolet lamp, and closing the ultraviolet lamp after printing is finished to finish one-time printing.
Has the advantages that:
(1) according to the invention, the wire material is sprayed out through the inner spray head, the slurry is sprayed out through the outer spray head, the two materials of the wire material and the slurry are combined and printed, different material parts are arranged on the surface and inside of the printed part, and the limitation of the traditional single material is broken through;
(2) the printing method of the wire sprayed by the inner spray head is based on the FDM fused deposition molding technology, the printing method of the slurry sprayed by the outer spray head is based on the photocuring printing technology, FDM printing has high printing efficiency, and photocuring printing has high printing precision.
(3) The ultraviolet lamp is used for irradiating the slurry sprayed out of the outer spray head, photocuring is carried out, the surface quality of the printed part can be effectively improved, and post-treatment is simple and convenient.
(4) The invention uses the air pressure transmission device to provide power for the slurry, and uses the air pressure sensor to monitor in real time, thereby effectively reducing the error rate of printing and improving the printing precision.
(5) The heater is used for heating the wire guide pipe, different temperatures can be selected according to different wires, the application range of the wires is wide, the temperature of the inner spray head is monitored in real time by using the temperature sensor, the temperature during printing is controlled in real time, and the printing precision is improved.
Drawings
FIG. 1 is a schematic diagram of a printhead structure of a printer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a method for operating a printhead of a printer according to an embodiment of the invention.
Reference numerals:
the device comprises an outer spray head 1, an inner spray head 2, a temperature sensor 3, a heater 4, a wire guide pipe 5, a slurry opening 6, a wire guide 7, a thread 8, an air pressure sensor 9, an air pressure meter 10, an air pressure transmission device 11, an ultraviolet lamp 12 and a supporting beam 13.
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 the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, a photocuring-FDM combined material printer nozzle combines the precision of printing, the diameter of the nozzle is preferably 0.1 to 2mm, the nozzle includes an inner nozzle 2 and an outer nozzle 1, the outer nozzle 1 is communicated with a hollow slurry cavity, so that slurry can flow into the outer nozzle from the slurry cavity, and a slurry port 6 is arranged above the slurry cavity and used for timely supplementing slurry. An ultraviolet lamp 12 is arranged below the slurry cavity, and the irradiation position of the ultraviolet lamp 12 corresponds to the position of the outer nozzle 1 for spraying the slurry, and is used for curing the sprayed slurry in time. An inner spray head 2 is arranged in the slurry cavity and is fixed with the inner spray head 2 through threads 8, the inner spray head 2 penetrates through the hollow slurry cavity and extends into the outer spray head 1, and a nozzle of the inner spray head 2 corresponds to a nozzle of the outer spray head 1. And supporting beams 13 for fixing the inner spray head 2 and the outer spray head 1 are also arranged between the inner spray head 2 and the outer spray head 1, the number of the supporting beams 13 is preferably 3, and the difference between two adjacent supporting beams 13 in the plane is 120 degrees. The inside silk guide pipe 5 of placing the silk material that is equipped with of interior shower nozzle 2, this silk guide pipe 5 top is equipped with seal wire ware 7 in order to provide power to the silk material, and 5 outside parcel heaters 4 of silk guide pipe are used for melting the silk material, and 4 outer parcel temperature sensor 3 of heater. The atmospheric pressure sensor 11 passes through the pipe connection thick liquids chamber, and the junction in pipeline and thick liquids chamber is the atmospheric pressure interface, and the atmospheric pressure interface is equipped with the high gas tightness of sealing rubber circle when guaranteeing the atmospheric pressure transmission, still is equipped with baroceptor 9 and the barometer 10 that can measure and show pipeline atmospheric pressure state on the pipeline, and barometer 9 and the atmospheric pressure transmission device 11 of barometer 10 electric connection.
Referring to fig. 2, a working method of a photo-curing-FDM combined material printer nozzle is specifically described:
step 1: and drawing the three-dimensional model by using three-dimensional drawing software, selecting the slice thickness according to the printing precision, and setting the slice thickness as a parameter for storage.
Step 2: and filling the silk material and the slurry into the silk guide pipe and the slurry cavity respectively, and guiding the printing parameters into a printer.
And step 3: the heater preheats the nozzle, meanwhile, the heating temperature of the heater is set according to the difference of printing materials, and the heating temperature range is 150-300 ℃ for the high polymer composite material; aiming at the ceramic material, the heating temperature is between 1000 ℃ and 1500 ℃, and a temperature sensor monitors the temperature of the nozzle in real time and carries out feedback regulation; for metal materials, the heating temperature is between 700 ℃ and 1500 ℃; and turning on the ultraviolet lamp to prepare for printing.
And 4, step 4: printing is started, the power unit starts to work, and the air pressure transmission device of the power unit provides pressure for the slurry cavity to enable the slurry to be sprayed out of the outer spray head; the wire guider of the power unit provides power for the wires, and the wires are downwards transmitted and are sprayed out from the inner spray head after being heated and melted by the heater.
And 5: the printing system simultaneously detects whether the wire outlet speed of the inner spray head and the slurry outlet speed of the outer spray head meet the synchronous requirement, when the requirement is not met, the rotating speed of a roller in the wire guide is adjusted to adjust the wire outlet speed, the air pressure transmission device is adjusted to adjust the air pressure value, the slurry outlet speed is changed until the working speeds of the inner spray head and the outer spray head are proper, and the printing requirement is met.
Step 6: and (3) automatically cooling and forming the wire, forming the slurry after the slurry is irradiated by an ultraviolet lamp, and closing the ultraviolet lamp after printing is finished to finish one-time printing.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a photocuring-FDM combined material print head, includes shower nozzle and power pack, its characterized in that: the spray head comprises an inner spray head (2) and an outer spray head (1), the outer spray head (1) is communicated with a slurry cavity, an ultraviolet lamp (12) is arranged at the position corresponding to the spray position of the outer spray head (1), and the inner spray head (2) is arranged in the slurry cavity; a wire guide pipe (5) is arranged in the inner spray head (2), and a heater (4) is wrapped outside the wire guide pipe (5); the power unit is fixedly connected with the spray head and provides power for the spray head.
2. The photo-curing-FDM combined material printer nozzle of claim 1, wherein: the inner spray head (2) penetrates through the slurry cavity and extends into the outer spray head (1), and the nozzle of the inner spray head (2) corresponds to the nozzle of the outer spray head (1).
3. A photo-curing-FDM combined material printer nozzle as claimed in claim 1 or 2, in which: and a supporting beam (13) for supporting and connecting is arranged between the inner spray head (2) and the outer spray head (1).
4. The photo-curing-FDM combined material printer nozzle of claim 3, wherein: the number of the supporting beams (13) is 3, and the angle difference between every two adjacent supporting beams (13) in a plane is 120 degrees.
5. The photo-curing-FDM combined material printer nozzle of claim 1, wherein: and a temperature sensor (3) is arranged on the outer side of the heater (4), and the temperature sensor (3) is a resistance type heater and/or an inductance type heater.
6. The photo-curing-FDM combined material printer nozzle of claim 1, wherein: the power unit comprises a thread guide (7) and a pneumatic transmission device (11), the thread guide (7) is fixedly connected above the thread guide pipe (5), and the pneumatic transmission device (11) is connected with the slurry cavity through a pipeline.
7. The photo-curing-FDM composite material printer head of claim 6, wherein: the pipeline is provided with an air pressure sensor (9) and an air pressure meter (10) which are used for measuring and displaying the air pressure state of the pipeline respectively, and the air pressure sensor (9) and the air pressure meter (10) are electrically connected with the air pressure transmission device (11).
8. The photo-curing-FDM combined material printer nozzle of claim 1, wherein: the wire guide tube (5) is internally provided with wires which are made of one or more of polymer materials, ceramic materials and metal materials.
9. The photo-curing-FDM combined material printer nozzle of claim 1, wherein: the slurry cavity is filled with slurry, and the slurry is ceramic slurry and/or polymer slurry containing photosensitive resin.
10. A working method of a printer nozzle made of a photocuring-FDM combined material is characterized by comprising the following steps:
step 1: drawing a three-dimensional model by using three-dimensional drawing software, selecting the slice thickness according to the printing precision, and setting the slice thickness as a parameter for storage;
step 2: filling the silk material and the slurry into a silk guide pipe and a slurry cavity respectively, and guiding printing parameters into a printer;
and step 3: the heater preheats the nozzle, and meanwhile, the heating temperature of the heater is set according to the difference of printing materials; turning on an ultraviolet lamp to prepare for printing;
and 4, step 4: printing is started, the power unit starts to work, and the air pressure transmission device of the power unit provides pressure for the slurry cavity to enable the slurry to be sprayed out of the outer spray head; the wire guider of the power unit provides power for the wires, and the wires are downwards transmitted and are sprayed out from the inner spray head after being heated and melted by the heater;
and 5: the printing system simultaneously detects whether the wire outlet rate of the inner spray head and the pulp outlet rate of the outer spray head meet the synchronous requirement, and when the requirements are not met, the wire guide and the pneumatic transmission device are adjusted until the working rates of the inner spray head and the outer spray head are just proper, so that the printing requirement is met;
step 6: and (3) automatically cooling and forming the wire, forming the slurry after the slurry is irradiated by an ultraviolet lamp, and closing the ultraviolet lamp after printing is finished to finish one-time printing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011169030.7A CN112497740A (en) | 2020-10-27 | 2020-10-27 | photocuring-FDM combined material printer nozzle and working method thereof |
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| CN202011169030.7A CN112497740A (en) | 2020-10-27 | 2020-10-27 | photocuring-FDM combined material printer nozzle and working method thereof |
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| CN112497740A true CN112497740A (en) | 2021-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222431A1 (en) * | 2021-04-22 | 2022-10-27 | 西安交通大学 | Multifunctional additive manufacturing device and method for hollow-filled composite material wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222431A1 (en) * | 2021-04-22 | 2022-10-27 | 西安交通大学 | Multifunctional additive manufacturing device and method for hollow-filled composite material wire |
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