CN111251608A - Print head nozzle assembly and 3D printing system - Google Patents

Print head nozzle assembly and 3D printing system Download PDF

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Publication number
CN111251608A
CN111251608A CN202010208508.6A CN202010208508A CN111251608A CN 111251608 A CN111251608 A CN 111251608A CN 202010208508 A CN202010208508 A CN 202010208508A CN 111251608 A CN111251608 A CN 111251608A
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CN
China
Prior art keywords
nozzle
nozzle assembly
printing
cooling unit
bend
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010208508.6A
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Chinese (zh)
Inventor
金晴宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jin Qingyu
Original Assignee
Meditool Medical Technology Shanghai Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meditool Medical Technology Shanghai Co ltd filed Critical Meditool Medical Technology Shanghai Co ltd
Priority to CN202010208508.6A priority Critical patent/CN111251608A/en
Publication of CN111251608A publication Critical patent/CN111251608A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/205Means for applying layers
    • B29C64/209Heads; Nozzles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/10Processes of additive manufacturing
    • B29C64/106Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118Processes 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]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264Arrangements for irradiation
    • B29C64/268Arrangements for irradiation using laser beams; using electron beams [EB]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive 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
    • B29C64/30Auxiliary operations or equipment
    • B29C64/386Data acquisition or data processing for additive manufacturing
    • B29C64/393Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y50/00Data acquisition or data processing for additive manufacturing
    • B33Y50/02Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16Cooling
    • B29C2035/1658Cooling using gas

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Toxicology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)

Abstract

The application discloses beat printer head nozzle assembly and 3D printing system, should beat printer head nozzle assembly and include: the nozzle is used for spraying a sprayed object to the surface of a target printed object, and the non-contact infrared temperature measuring probe and the air blowing cooling unit are arranged around the outer side of the nozzle. The 3D printing system comprises the printing head nozzle assembly. The method is suitable for the 3D printing system based on the fusion jet accumulation molding principle, the temperature of the most critical position in the 3D printing process can be accurately monitored and controlled in real time, and the efficiency, speed and yield of 3D printing can be effectively improved; non-contact infrared temperature probe, laser unit and the cooling unit that blows in this application all can not receive sheltering from, do not receive the influence of beating printer head nozzle motion.

Description

Print head nozzle assembly and 3D printing system
Technical Field
The application belongs to the technical field of 3D printing, and particularly relates to a printing head nozzle assembly and a 3D printing system.
Background
At present, 3D printing equipment uses a heating cavity with a simple heating function, more advanced is to use the heating cavity heated by infrared rays, but the infrared rays conduct heat to the surface of a target object through irradiation, the process is slow, and the requirement of fast printing for accurately controlling the surface temperature of a printing area is difficult to meet; meanwhile, infrared rays are irradiated from a light source to the surface of a target object in a direct light mode, but moving parts such as a nozzle of the printing equipment can generate shielding, and the shielding is the most critical part which is directly contacted with a nozzle jet object, so that the temperature is difficult to control accurately.
The existing temperature measuring method of the heating cavity of the 3D printing equipment is very original and difficult to accurately measure the actual real-time temperature of the surface of a target printing object.
Disclosure of Invention
In view of the above-mentioned shortcomings or drawbacks of the prior art, the present application provides a printhead nozzle assembly and a 3D printing system.
In order to solve the above technical problem, the present application has the following configurations:
the present application provides a printhead nozzle assembly comprising: the nozzle is used for spraying a sprayed object to the surface of a target printed object, and the non-contact infrared temperature measuring probe and the air blowing cooling unit are arranged around the outer side of the nozzle.
As a further improvement, the present application further includes a laser unit also provided around the outside of the nozzle, wherein the laser unit emits laser light and irradiates a specific region of the surface of the target printed object.
As a further improvement, the coverage area of the specific region is larger than the mapping area of the opening on the nozzle vertically mapped onto the specific region.
As a further improvement, the non-contact infrared temperature measuring probe is arranged on the nozzle through a first fixed block.
As a further improvement, the non-contact infrared temperature measuring probe is provided with a first bending part, and the first bending part is bent towards the nozzle arrangement direction.
As a further improvement, the blow cooling unit is mounted on the nozzle through a second fixed block.
As a further improvement, the blowing cooling unit is provided with a second bending part, and the second bending part is bent towards the nozzle arrangement direction.
As a further improvement, the conveying gas in the blowing cooling unit is inert gas.
As a further improvement, the laser unit is mounted on the nozzle through a third fixed block.
As a further improvement, the laser unit is provided with a third bending part, and the third bending part is bent towards the nozzle arrangement direction.
The application also provides a 3D printing system, which comprises the printing head nozzle assembly.
Compared with the prior art, the method has the following technical effects:
the method is suitable for the 3D printing system based on the fusion jet accumulation molding principle, the temperature of the most critical position in the 3D printing process can be accurately monitored and controlled in real time, the requirement of accurately controlling the surface temperature of the printing area in the 3D printing process is met, and the efficiency, the speed and the yield of 3D printing can be effectively improved; non-contact infrared temperature probe, laser unit and the cooling unit that blows in this application all can not receive sheltering from, do not receive the influence of beating printer head nozzle motion.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: the application discloses a structural schematic diagram of a nozzle assembly of a printing head.
Detailed Description
The conception, specific structure and technical effects of the present application will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application.
As shown in fig. 1, the printhead nozzle assembly of the present embodiment includes: the device comprises a nozzle 10, a non-contact infrared temperature measuring probe 30 and an air blowing cooling unit 20, wherein the nozzle 10 is used for spraying a sprayed object to the surface of a target printed object, and the non-contact infrared temperature measuring probe 30 and the air blowing cooling unit 20 are arranged around the outer side of the nozzle 10. The non-contact infrared temperature measuring probe 30 monitors the temperature of the specific area of the surface of the target printed object in real time, and the blowing cooling unit 20 can blow low-temperature gas to the specific area of the surface of the target printed object so as to instantly reduce the temperature of the specific area of the surface of the target printed object.
The installation manner of the non-contact infrared temperature measurement probe 30 and the nozzle 10 can enable the non-contact infrared temperature measurement probe 30 and the nozzle 10 to move simultaneously and monitor the actual accurate temperature of a small-range area of the upper surface of the target printing object below the nozzle 10 in real time.
In the present embodiment, the specific area includes, but is not limited to, a circular spot, wherein the specific area has a shape that does not limit the scope of the present application.
Wherein the specific region is a region of the surface of the target print object opposite to directly below the nozzle 10.
Further, in this embodiment, the coverage area of the specific region is larger than the mapping area of the opening on the nozzle 10 vertically mapping to the specific region, and this arrangement can ensure that when the ejected object is ejected to the surface of the target printed object by the nozzle 10, the contacted target range can be monitored in real time or heated (heated by the laser unit 40 to emit laser light) or cooled to meet the temperature requirement of the printing material in the 3D printing process.
The number of the non-contact infrared temperature measuring probes 30 is at least one, and the non-contact infrared temperature measuring probes are circumferentially arranged around the outer side of the nozzle 10. Preferably, the non-contact infrared temperature measuring probe 30 is uniformly arranged around the outer side of the nozzle 10 along the circumferential direction. The non-contact infrared temperature measuring probes 30 are uniformly distributed in the circumferential direction, so that multi-point measurement and multi-point monitoring can be performed on a specific area of the surface of a target printed object, and the accuracy of real-time monitoring data is sought.
The non-contact infrared temperature measurement probe 30 is mounted on the nozzle 10 through a first fixed block, wherein the first fixed block can be replaced by a fixed plate, a fixed strip and other structures, and the non-contact infrared temperature measurement probe 30 can be fixedly mounted on the nozzle 10. The non-contact infrared temperature measuring probe 30 can move along with the nozzle 10, so that the real-time temperature monitoring area can be effectively ensured to always cover the printing range of the nozzle 10.
The non-contact infrared temperature measuring probe 30 is provided with a first bending part 31, and the first bending part 31 is bent towards the setting direction of the nozzle 10. The first bending part 31 is arranged in a manner that the non-contact infrared temperature measuring probe 30 can monitor the surface temperature of the target printing object arranged right below the nozzle 10 in real time.
Of course, the blow cooling unit 20 includes a blow cooling pipe, which is mounted on the nozzle 10 through a second fixing block, wherein the second fixing block may be replaced with a fixing plate, a fixing bar, or the like, as long as it is suitable to fixedly mount the blow cooling unit 20 on the nozzle 10. Wherein the blow cooling unit 20 is movable along with the nozzle 10.
Similarly, the blowing cooling unit 20 is provided with a second bending portion 21, and the second bending portion 21 is bent toward the nozzle 10. The second bending part 21 is disposed in a manner that the blowing cooling unit 20 can timely cool the surface of the target printing object disposed right below the nozzle 10.
In the present embodiment, the blow cooling unit 20 is provided in at least one number, which is circumferentially provided around the outer side of the nozzle 10. Preferably, the blow cooling units 20 are uniformly arranged around the outside of the nozzle 10 in the circumferential direction. The blowing cooling units 20 are uniformly arranged in the circumferential direction, so that the specific area on the surface of the target printed object can be cooled at multiple points at the same time, the working efficiency is improved, and the error is reduced as much as possible.
In another embodiment, the blow air cooling unit 20 is preferably implemented as a blow air cooling tube.
More importantly, the transport gas in the purge cooling unit is an inert gas, such as helium (He), neon (Ne), argon (Ar), or the like. The inert gas can protect the printing material at high temperature, and the 3D printing material and oxygen in the air are prevented from generating oxidation reaction at high temperature, so that the quality of a finished product of the target printing object is influenced.
The present embodiment further includes a laser unit 40, and the laser unit 40 is also disposed around the outer side of the nozzle 10, wherein the laser unit 40 emits laser light and irradiates a specific region of the surface of the target printed object.
The laser units 40 are provided in at least one number, and are circumferentially arranged around the outer side of the nozzle 10. Preferably, the laser units 40 are uniformly arranged around the outside of the nozzle 10 in the circumferential direction. The laser units 40 are uniformly distributed in the circumferential direction, so that the uniformity of laser irradiation on a specific area on the surface of a target printed object can be ensured, and the influence on the forming of a 3D printed product due to overhigh or overlow temperature at a certain position is avoided.
Wherein the laser unit 40 is mounted on the nozzle 10 through a third fixing block. The third fixing block is replaced by a fixing plate, a fixing bar, or the like, as long as the laser unit 40 can be fixedly mounted on the nozzle 10. Wherein, the laser unit 40 can move along with the nozzle 10, which can effectively ensure that the irradiation area always covers the printing range of the nozzle 10.
More importantly, the laser unit 40 is provided with a third bending part 41, and the third bending part 41 is bent towards the installation direction of the nozzle 10. The third bent portion 41 is provided in such a manner that the laser beam emitted from the laser unit 40 is irradiated on the surface of the target printed object directly below the nozzle 10.
In the present embodiment, the laser unit 40 is a laser fiber optic bundle for emitting a laser beam to irradiate and heat a specific position on the upper surface of the target printed object to which the jet from the nozzle 10 is to arrive.
Of course, in this embodiment, for the convenience of installation and fixation, the first fixing block, the second fixing block and the third fixing block may be the same fixing block 50 (as shown in fig. 1), and of course, the first fixing block, the second fixing block and the third fixing block may also be different structures, and they may be installed at the same or different positions of the nozzle 10 at the same time, so as to meet the requirement of installation and fixation.
The application also provides a 3D printing system, which comprises the printing head nozzle assembly.
The working principle of the application is as follows:
the real-time accurate temperature data of the specific area on the upper surface of the target printing object, which is measured by the non-contact infrared temperature measuring probe 30, is transmitted to the control system, the control system plans the ideal surface temperature of each position of the whole printing track in advance according to the printing data, and if the real-time monitored temperature is higher than the preset ideal temperature, the control system adopts a PID (differential, integral and proportional control) algorithm to instruct the air blowing cooling unit 20 beside the printing head nozzle 10 to blow out a specific amount of low-temperature gas to immediately reduce the temperature of the specific area on the upper surface of the target printing object; if the real-time monitored temperature is lower than the preset ideal temperature, the control system uses a PID (differential, integral, proportional control) algorithm to instruct the laser unit 40 to operate, so as to raise the temperature of a specific area on the upper surface of the target printed object to the preset ideal temperature.
The method is suitable for the 3D printing system based on the fusion jet accumulation molding principle, the temperature of the most critical position in the 3D printing process can be accurately monitored and controlled in real time, the requirement of accurately controlling the surface temperature of the printing area in the 3D printing process is met, and the efficiency, the speed and the yield of 3D printing can be effectively improved; the non-contact infrared temperature measuring probe 30, the laser unit 40 and the blowing cooling unit 20 in the application can be free from being shielded and influenced by the movement of the printing head nozzle 10.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.

Claims (11)

1. A printhead nozzle assembly, comprising: the nozzle is used for spraying a sprayed object to the surface of a target printed object, and the non-contact infrared temperature measuring probe and the air blowing cooling unit are arranged around the outer side of the nozzle.
2. A printhead nozzle assembly according to claim 1, further comprising a laser unit also disposed around the outside of the nozzle, wherein the laser unit emits laser light and irradiates a specific region of a surface of a target printed object.
3. A printhead nozzle assembly according to claim 2, wherein the footprint of the defined region is greater than the area of the projection of the aperture in the nozzle perpendicularly onto the defined region.
4. A printhead nozzle assembly according to any one of claims 1 to 3, wherein the non-contact infrared temperature probe is mounted on the nozzle by a first mounting block.
5. A printhead nozzle assembly according to claim 4, wherein the non-contact infrared temperature probe has a first bend, the first bend being arranged to bend towards the nozzle arrangement direction.
6. A printhead nozzle assembly according to any of claims 1 to 3, wherein the blow cooling unit is mounted on the nozzle by a second fixing block.
7. The printhead nozzle assembly of claim 6, wherein the air-blow cooling unit is provided with a second bend, the second bend being bent toward the nozzle arrangement direction.
8. The printhead nozzle assembly of claim 6, wherein the transport gas in the purge cooling unit is an inert gas.
9. A printhead nozzle assembly according to claim 2 or 3, wherein the laser unit is mounted on the nozzle by a third fixed block.
10. The printhead nozzle assembly of claim 9, wherein the laser unit is provided with a third bend, the third bend being bent toward the nozzle arrangement direction.
A 3D printing system comprising a printhead nozzle assembly as claimed in claims 1 to 10.
CN202010208508.6A 2020-03-23 2020-03-23 Print head nozzle assembly and 3D printing system Pending CN111251608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010208508.6A CN111251608A (en) 2020-03-23 2020-03-23 Print head nozzle assembly and 3D printing system

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Application Number Priority Date Filing Date Title
CN202010208508.6A CN111251608A (en) 2020-03-23 2020-03-23 Print head nozzle assembly and 3D printing system

Publications (1)

Publication Number Publication Date
CN111251608A true CN111251608A (en) 2020-06-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111844750A (en) * 2020-07-21 2020-10-30 鑫精合激光科技发展(北京)有限公司 3D printing head, 3D printer and 3D printing method
CN113211793A (en) * 2021-06-02 2021-08-06 青岛科技大学 Anti-warping device and anti-warping method
CN114055771A (en) * 2020-07-29 2022-02-18 精工爱普生株式会社 Three-dimensional molding device, method for manufacturing three-dimensional molded object, and information processing device
CN115214129A (en) * 2022-07-01 2022-10-21 四川大学 Continuous fiber reinforced composite 3D printing head and printer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111844750A (en) * 2020-07-21 2020-10-30 鑫精合激光科技发展(北京)有限公司 3D printing head, 3D printer and 3D printing method
CN111844750B (en) * 2020-07-21 2022-07-08 鑫精合激光科技发展(北京)有限公司 3D printing head, 3D printer and 3D printing method
CN114055771A (en) * 2020-07-29 2022-02-18 精工爱普生株式会社 Three-dimensional molding device, method for manufacturing three-dimensional molded object, and information processing device
CN114055771B (en) * 2020-07-29 2023-11-24 精工爱普生株式会社 Three-dimensional modeling apparatus, method for manufacturing three-dimensional modeling object, and information processing apparatus
CN113211793A (en) * 2021-06-02 2021-08-06 青岛科技大学 Anti-warping device and anti-warping method
CN113211793B (en) * 2021-06-02 2022-11-04 青岛科技大学 Anti-warping device and anti-warping method
CN115214129A (en) * 2022-07-01 2022-10-21 四川大学 Continuous fiber reinforced composite 3D printing head and printer

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Effective date of registration: 20210324

Address after: 200237 Room 502, No.60, meilongliu village, Xuhui District, Shanghai

Applicant after: Jin Qingyu

Address before: 201806 2nd floor, building 4, No. 4585, Baoqian Road, Jiading District, Shanghai

Applicant before: MEDITOOL MEDICAL TECHNOLOGY (SHANGHAI) Co.,Ltd.

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