CN106738914B - A kind of effective 3D printing head for solving wire drawing phenomenon - Google Patents
A kind of effective 3D printing head for solving wire drawing phenomenon Download PDFInfo
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- CN106738914B CN106738914B CN201710049461.1A CN201710049461A CN106738914B CN 106738914 B CN106738914 B CN 106738914B CN 201710049461 A CN201710049461 A CN 201710049461A CN 106738914 B CN106738914 B CN 106738914B
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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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Abstract
The present invention relates to a kind of 3D printing heads for effectively solving wire drawing phenomenon, including nozzle, heat block, trunnion, cooling mechanism, feeding mechanism and pumpback component, radiating subassembly includes first shell, heat-dissipating pipe, feeding mechanism includes second shell, feed pipe, feeding assembly and adjusting component, feeding assembly includes charging gear and charging motor, adjusting component includes pressure roller and shaft, pumpback component includes pumpback pipe, first resistance piece and the second resistance piece, in effective 3D printing head for solving wire drawing phenomenon, adjustable charging the distance between the gear and pressure roller of feeding mechanism, to adapt to various sizes of raw material thread, the raw material that there is cooling mechanism high cooling efficiency can prevent fusing flows back into heat-dissipating pipe, pumpback component can prevent the wire drawing phenomenon generated when printing two independent individuals.
Description
Technical field
The present invention relates to 3D printing field, in particular to a kind of 3D printing head for effectively solving wire drawing phenomenon.
Background technique
3D printing (3DP) i.e. one kind of rapid shaping technique, it is one kind based on digital model file, with powder
The adhesive materials such as shape metal or plastics construct the technology of object by layer-by-layer printing.
As emerging technology, many problems can be usually encountered during 3D printing, among these just include wire drawing phenomenon,
Wire drawing phenomenon in so-called ground is exactly when printing two neighboring independent subject, since what print head material leakage generated leads silk, although existing
3D beat existing pumpback mechanism, however the problem of can not but be fully solved wire drawing.
Summary of the invention
The technical problem to be solved by the present invention is for overcome the deficiencies in the prior art, providing a kind of effectively solution wire drawing
The 3D printing head of phenomenon.
It is of the present invention solve the problems, such as used by technical solution be: a kind of 3D printing head effectively solving wire drawing phenomenon, including
Nozzle, heat block, trunnion, cooling mechanism, feeding mechanism and pumpback component；
The nipple top is equipped with connecting tube, and the upper end of the connecting tube is equipped with external screw thread, and the heat block is equipped with logical
Hole, the through-hole are vertical through hole, and the upper and lower ends of the through-hole are equipped with internal screw thread, and the nozzle is by connecting tube and adds
Heat block connection, the connecting tube is threadedly coupled with heat block, and the heat block is located at the top of nozzle, and up and down the two of the trunnion
End is equipped with external screw thread, and the lower end of the trunnion is threadedly coupled with heat block, and the upper end of the trunnion and cooling mechanism screw thread connect
Connect, the cooling mechanism is connected to feeding mechanism, and one end of the pumpback component is located in nozzle, the pumpback component it is another
End is located in connecting tube；
The radiating subassembly includes first shell, heat-dissipating pipe, and the heat-dissipating pipe is vertically arranged, and the heat-dissipating pipe passes through first
Shell, the heat-dissipating pipe lower end are equipped with internal screw thread, and the lower end of the heat-dissipating pipe and the threaded upper ends of trunnion connect, the heat-dissipating pipe
Upper end be equipped with external screw thread, the feeding mechanism is located at the top of heat-dissipating pipe, and the heat-dissipating pipe is threadedly coupled with feeding mechanism；
The feeding mechanism includes second shell, feed pipe, feeding assembly and adjusts component, and the feed pipe is vertically set
It sets, the feed pipe passes through second shell, and the lower end of the feed pipe is equipped with internal screw thread, the lower end of the feed pipe and heat-dissipating pipe
Threaded upper ends connection, the feeding assembly and adjust component be respectively positioned in second shell, the feeding assembly and adjust component
It is located at the two sides of feed pipe；
The feeding assembly includes charging gear and charging motor, and the charging gear is set in the output shaft of charging motor
On, the charging gear is vertically arranged, and one end of the charging gear is located in feed pipe, the other end position of the charging gear
In in second shell；
The adjusting component includes pressure roller and shaft, and the shaft is horizontally disposed, and the pressure roller is set in shaft, described
Pressure roller and charging gear are arranged about the axisymmetrical of feed pipe；
The pumpback component includes pumpback pipe, the first resistance piece and the second resistance piece, and the pumpback pipe is vertically arranged, the pumpback
One end of pipe is located in nozzle, and the other end of the pumpback pipe is located in connecting tube, and the pumpback pipe is slidably connected with connecting tube,
The first resistance piece is arranged on the inner wall of pumpback pipe, and one end of the first resistance piece is connect with the inner wall of pumpback pipe, and described the
The other end of one resistance piece is tilted towards the direction setting of nozzle, and the first resistance piece has several, and each first resistance piece is in pumpback pipe
It is uniformly distributed on inner wall, one end of the second resistance piece is arranged in pumpback pipe outer wall, the other end inclination of the second resistance piece
To the opposite direction of nozzle be arranged, it is described second resistance piece have several, it is each second resistance piece on the outer wall of pumpback pipe with distribution, institute
The second resistance piece is stated to be located in nozzle.
Preferably, in order to make nozzle have the function of that high-efficiency heating, the nozzle are equipped with bottoming hole, the bottoming hole water
Flat setting, the bottoming hole is interior to be equipped with heater.
Preferably, the nozzle is equipped with thermometer hole, the thermometric in order to the heating temperature of real-time monitoring nozzle
Hole horizontal setting, the thermometer hole is interior to be equipped with temperature sensor.
Preferably, in order to improve the measurement range of temperature sensor and stability, the temperature sensor is thermocouple
Temperature sensor.
Preferably, in order to improve the capacity of heat transmission of nozzle, the making material of the nozzle is copper.
Preferably, in order to improve heat dissipation effect, the heat-sink unit further includes radiating fin and fan, the radiating fin
Piece has several, and each radiating fin is uniformly distributed on the outer wall of heat-dissipating pipe, and the radiating fin is located in first shell, described
Radiator fan is arranged on the first shell, and the radiator fan is connected to first shell.
Preferably, in order to make easily by pumpback pipe through in connecting tube insertion nozzle, described second hinders the production material of piece
Material is memorial alloy.
Preferably, in order to adjust charging the distance between gear and pressure roller, to adapt to various sizes of raw material thread,
The adjusting component further includes sliding slot, connecting plate and worm screw, and there are two the sliding slots, and the sliding slot is symmetricly set on second shell
Inner wall on, the both ends of the shaft are respectively positioned in sliding slot and are slidably connected with sliding slot.
Preferably, in order to further increase radiating efficiency, the outer wall of the heat-dissipating pipe is coated with heat radiation coating.
Preferably, in order to accurately control motor, the charging motor is servo motor.
The invention has the advantages that effective 3D printing for solving wire drawing phenomenon is ingenious in design, feasibility is high, charging
Adjustable charging the distance between the gear and pressure roller of mechanism, to adapt to various sizes of raw material thread, cooling mechanism has high dissipate
The thermal efficiency can prevent the raw material of fusing from flowing back into heat-dissipating pipe, and pumpback component can prevent the production when printing two independent individuals
Raw wire drawing phenomenon.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram for the 3D printing head that one kind of the invention effectively solves wire drawing phenomenon.
Fig. 2 is the top view of the feeding mechanism for the 3D printing head that one kind of the invention effectively solves wire drawing phenomenon.
Fig. 3 is the structural schematic diagram of the pumpback component for the 3D printing head that one kind of the invention effectively solves wire drawing phenomenon.
Fig. 4 is the top view of the heat block for the 3D printing head that one kind of the invention effectively solves wire drawing phenomenon.
In figure: 1. nozzles, 2. heat blocks, 3. trunnions, 4. connecting tubes, 5. through-holes, 6. first shells, 7. heat dissipations
Pipe, 8. second shells, 9. feed pipes, 10. charging gears, 11. charging motors, 12. pressure rollers, 13. shafts, 14. pumpbacks
Pipe, 15. first resistance pieces, 16. second resistance pieces, 17. heaters, 18. temperature sensors, 19. radiating fins, 20. fans,
21. sliding slot.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figs 1-4, it is a kind of it is effective solve wire drawing phenomenon 3D printing head, including nozzle 1, heat block 2, trunnion 3, dissipate
Heat engine structure, feeding mechanism and pumpback component；
Connecting tube 4 is equipped at the top of the nozzle 1, the upper end of the connecting tube 4 is equipped with external screw thread, sets on the heat block 2
There is through-hole 5, the through-hole 5 is vertical through hole, and the upper and lower ends of the through-hole 5 are equipped with internal screw thread, and the nozzle 1 passes through company
Adapter tube 4 is connected to heat block 2, and the connecting tube 4 is threadedly coupled with heat block 2, and the heat block 2 is located at the top of nozzle 1, institute
The upper and lower ends for stating trunnion 3 are equipped with external screw thread, and the lower end of the trunnion 3 is threadedly coupled with heat block 2, the trunnion 3 it is upper
End is threadedly coupled with cooling mechanism, and the cooling mechanism is connected to feeding mechanism, and one end of the pumpback component is located at nozzle 1
Interior, the other end of the pumpback component is located in connecting tube 4；
The radiating subassembly includes first shell 6, heat-dissipating pipe 7, and the heat-dissipating pipe 7 is vertically arranged, and the heat-dissipating pipe 7 passes through
First shell 6,7 lower end of heat-dissipating pipe are equipped with internal screw thread, and the lower end of the heat-dissipating pipe 7 is connect with the threaded upper ends of trunnion 3, institute
The upper end for stating heat-dissipating pipe 7 is equipped with external screw thread, and the feeding mechanism is located at the top of heat-dissipating pipe 7, the heat-dissipating pipe 7 and feeding mechanism
It is threadedly coupled；
The feeding mechanism includes second shell 8, feed pipe 9, feeding assembly and adjusts component, and the feed pipe 9 is vertical
Setting, the feed pipe 9 pass through second shell 8, and the lower end of the feed pipe 9 is equipped with internal screw thread, the lower end of the feed pipe 9 with
The threaded upper ends of heat-dissipating pipe 7 connect, and the feeding assembly and adjust component and are respectively positioned in second shell 8, the feeding assembly and
Adjust the two sides that component is located at feed pipe 9；
The feeding assembly includes that charging gear 10 and charging motor 11, the charging gear 10 are set in charging motor 11
Output shaft on, the charging gear 10 is vertically arranged, it is described charging gear 10 one end be located in feed pipe 9, the charging
The other end of gear 10 is located in second shell 8；
The adjusting component includes pressure roller 12 and shaft 13, and the shaft 13 is horizontally disposed, and the pressure roller 12, which is set in, to be turned
On axis 13, the pressure roller 12 and charging gear 10 are arranged about the axisymmetrical of feed pipe 9；
The pumpback component includes that pumpback pipe 14, first hinders piece 15 and the second resistance piece 16, and the pumpback pipe 14 is vertically arranged,
One end of the pumpback pipe 14 is located in nozzle 1, and the other end of the pumpback pipe 14 is located in connecting tube 4, the pumpback pipe 14
Be slidably connected with connecting tube 4, it is described first resistance piece 15 is arranged on the inner wall of pumpback pipe 14, it is described first resistance piece 15 one end with
The inner wall of pumpback pipe 14 connects, and the other end of the first resistance piece 15 is tilted towards the direction setting of nozzle, the first resistance piece 15
There are several, each first resistance piece 15 is uniformly distributed on the inner wall of pumpback pipe 14, and one end setting of the second resistance piece 16 is being returned
It takes out on 14 outer wall of pipe, the other end of the second resistance piece 16 is tilted towards the opposite direction setting of nozzle, if the second resistance piece 16 has
Dry, with distribution on the outer wall of pumpback pipe 14, described second hinders piece 16 is located in nozzle 1 each second resistance piece 16.
Preferably, in order to make nozzle have the function of that high-efficiency heating, the nozzle 1 are equipped with bottoming hole, the bottoming hole
It is horizontally disposed, heater 17 is equipped in the bottoming hole.
Preferably, the nozzle 1 is equipped with thermometer hole, the survey in order to the heating temperature of real-time monitoring nozzle
Warm hole horizontal setting, the thermometer hole is interior to be equipped with temperature sensor 18.
Preferably, in order to improve the measurement range of temperature sensor 18 and stability, the temperature sensor 18 is heat
Galvanic couple temperature sensor 18.
Preferably, in order to improve the capacity of heat transmission of nozzle, the making material of the nozzle 1 is copper.
Preferably, in order to improve heat dissipation effect, the heat-sink unit further includes radiating fin 19 and fan 20, described to dissipate
Hot fin 19 has several, and each radiating fin 19 is uniformly distributed on the outer wall of heat-dissipating pipe 7, and the radiating fin 19 is located at first
In shell 6, the radiator fan 20 is arranged in first shell 6, and the radiator fan 20 is connected to first shell 6.
Preferably, in order to make easily to be inserted into pumpback pipe in nozzle 1 through connecting tube 4, the system of the second resistance piece 16
Making material is memorial alloy.
Preferably, in order to adjust charging the distance between gear 10 and pressure roller 12, to adapt to various sizes of original
Expect silk, the adjusting component further includes sliding slot 21, connecting plate and worm screw, and there are two the sliding slots 21, and the sliding slot 21 is symmetrically set
It sets on the inner wall of second shell 8, the both ends of the shaft 13 are respectively positioned in sliding slot 21 and are slidably connected with sliding slot 21.
Preferably, in order to further increase radiating efficiency, the outer wall of the heat-dissipating pipe 7 is coated with heat radiation coating.
Preferably, in order to accurately control motor, the charging motor 11 is servo motor.
In effective 3D printing head for solving wire drawing phenomenon, the working principle of feeding mechanism are as follows: utilize charging 10 He of gear
Frictional force between pressure roller 12 and raw material thread carries out feeding, and when charging, charging motor 11 drives Knucle-gear 10 to rotate.In addition,
Since the both ends of shaft 13 can be slided in sliding slot 21, charging the distance between gear 10 and pressure roller 12 is also adjustable,
It realizes and the raw material thread of different model is fed.The working principle of cooling mechanism are as follows: wandered away using radiating fin 19 and 20 band of fan
Heat in heat pipe 7.The working principle of pumpback component are as follows: when being added without pumpback component, because space is big in nozzle 1, beating
When starting rollback when print, only the raw material positioned at 1 center of nozzle can retract, and the raw material at edge, which then will continue to flow down, causes wire drawing existing
As after pumpback component is added, pumpback pipe 14 can move up and down in connecting tube 4, in printing when triggering Backward Function, return
The material moved back can pull up together pumpback pipe 14, and pumpback pipe 14 and the material in 1 exit of nozzle can rise together, therefore nozzle 1 goes out
Mouth does not have residual raw materials and flows down, and causes wire drawing phenomenon.In addition the second resistance piece 16 in pumpback component can use memorial alloy
Material, pumpback pipe 14 can be directly inserted into from connecting tube 4, be located at its second resistance piece 16 in nozzle 1.
Compared with prior art, this effectively solve wire drawing phenomenon 3D printing it is ingenious in design, feasibility is high, feeding mechanism
The distance between adjustable charging gear 10 and pressure roller 12, to adapt to various sizes of raw material thread, cooling mechanism has high dissipate
The thermal efficiency can prevent the raw material of fusing from flowing back into heat-dissipating pipe 7, and pumpback component can be prevented when printing two independent individuals
The wire drawing phenomenon of generation.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (9)
1. a kind of 3D printing head for effectively solving wire drawing phenomenon, which is characterized in that including nozzle (1), heat block (2), trunnion
(3), cooling mechanism, feeding mechanism and pumpback component；Connecting tube (4) are equipped at the top of the nozzle (1), the connecting tube (4)
Upper end is equipped with external screw thread, and the heat block (2) is equipped with through-hole (5), and the through-hole (5) is vertical through hole, the through-hole (5)
Upper and lower ends be equipped with internal screw thread, the nozzle (1) is connected to by connecting tube (4) with heat block (2), the connecting tube (4)
It is threadedly coupled with heat block (2), the heat block (2) is located at the top of nozzle (1), and the upper and lower ends of the trunnion (3) are all provided with
There is external screw thread, the lower end of the trunnion (3) is threadedly coupled with heat block (2), the upper end of the trunnion (3) and cooling mechanism screw thread
Connection, the cooling mechanism are connected to feeding mechanism, and one end of the pumpback component is located in nozzle (1), the pumpback component
The other end be located in connecting tube (4)；The radiating subassembly includes first shell (6), heat-dissipating pipe (7), and the heat-dissipating pipe (7) is perpendicular
To setting, the heat-dissipating pipe (7) passes through first shell (6), and heat-dissipating pipe (7) lower end is equipped with internal screw thread, the heat-dissipating pipe (7)
Lower end connect with the threaded upper ends of trunnion (3), the upper end of the heat-dissipating pipe (7) is equipped with external screw thread, and the feeding mechanism is located at
The top of heat-dissipating pipe (7), the heat-dissipating pipe (7) are threadedly coupled with feeding mechanism；
The feeding mechanism includes second shell (8), feed pipe (9), feeding assembly and adjusts component, and the feed pipe (9) is perpendicular
To setting, the feed pipe (9) passes through second shell (8), and the lower end of the feed pipe (9) is equipped with internal screw thread, the feed pipe
(9) lower end is connect with the threaded upper ends of heat-dissipating pipe (7), and the feeding assembly and adjusting component are respectively positioned in second shell (8),
The feeding assembly and adjusting component are located at the two sides of feed pipe (9)；
The feeding assembly includes that charging gear (10) and charging motor (11), the charging gear (10) are set in charging motor
(11) on output shaft, the charging gear (10) is vertically arranged, and one end of charging gear (10) is located at feed pipe (9)
Interior, the other end of charging gear (10) is located in second shell (8)；
The adjusting component includes pressure roller (12) and shaft (13), and the shaft (13) is horizontally disposed, and the pressure roller (12) is arranged
On shaft (13), the pressure roller (12) and charging gear (10) are arranged about the axisymmetrical of feed pipe (9)；
The pumpback component includes that pumpback pipe (14), the first resistance piece (15) and the second resistance piece (16), the pumpback pipe (14) are vertical
Setting, one end of the pumpback pipe (14) are located in nozzle (1), and the other end of the pumpback pipe (14) is located in connecting tube (4),
The pumpback pipe (14) is slidably connected with connecting tube (4), and first resistance piece (15) is arranged on the inner wall of pumpback pipe (14), institute
The one end for stating the first resistance piece (15) is connect with the inner wall of pumpback pipe (14), and the other end of first resistance piece (15) is tilted towards nozzle
Direction setting, it is described first resistance piece (15) have several, it is each first resistance piece (15) uniformly divides on the inner wall of pumpback pipe (14)
One end of cloth, second resistance piece (16) is arranged on pumpback pipe (14) outer wall, the other end inclination of second resistance piece (16)
It is arranged to the opposite direction of nozzle, second resistance piece (16) there are several, outer wall of each second resistance piece (16) in pumpback pipe (14)
On with distribution, it is interior that second resistance piece (16) is located at nozzle (1)；
The making material of second resistance piece (16) is memorial alloy.
2. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that set on the nozzle (1)
There is bottoming hole, the bottoming hole is horizontally disposed, is equipped with heater (17) in the bottoming hole.
3. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that set on the nozzle (1)
There is thermometer hole, the thermometer hole is horizontally disposed, is equipped with temperature sensor (18) in the thermometer hole.
4. the 3D printing head as claimed in claim 3 for effectively solving wire drawing phenomenon, which is characterized in that the temperature sensor
(18) it is thermocouple temperature sensor (18).
5. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that the system of the nozzle (1)
Making material is copper.
6. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that the heat-sink unit also wraps
Radiating fin (19) and fan (20) are included, the radiating fin (19) there are several, and each radiating fin (19) is in heat-dissipating pipe (7)
It is uniformly distributed on outer wall, the radiating fin (19) is located in first shell (6), and the radiator fan (20) is arranged in first shell
On body (6), the radiator fan (20) is connected to first shell (6).
7. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that the adjusting component also wraps
Sliding slot (21), connecting plate and worm screw are included, there are two the sliding slots (21), and the sliding slot (21) is symmetricly set on second shell (8)
Inner wall on, the both ends of the shaft (13) are respectively positioned in sliding slot (21) and are slidably connected with sliding slot (21).
8. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that the heat-dissipating pipe (7)
Outer wall is coated with heat radiation coating.
9. the 3D printing head as described in claim 1 for effectively solving wire drawing phenomenon, which is characterized in that the charging motor (11)
For servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049461.1A CN106738914B (en) | 2017-01-23 | 2017-01-23 | A kind of effective 3D printing head for solving wire drawing phenomenon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049461.1A CN106738914B (en) | 2017-01-23 | 2017-01-23 | A kind of effective 3D printing head for solving wire drawing phenomenon |
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| CN106738914A CN106738914A (en) | 2017-05-31 |
| CN106738914B true CN106738914B (en) | 2019-02-15 |
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| CN201710049461.1A Active CN106738914B (en) | 2017-01-23 | 2017-01-23 | A kind of effective 3D printing head for solving wire drawing phenomenon |
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| CN109531989B (en) * | 2017-06-05 | 2020-12-11 | 义乌市优创知识产权运营有限公司 | 3D printer |
| CN107283824B (en) * | 2017-06-19 | 2019-11-12 | 南京四点半信息科技有限公司 | A kind of intelligent 3D printer of the anti-wire drawing based on Internet of Things |
| CN107310150A (en) * | 2017-08-07 | 2017-11-03 | 长沙远达华信息科技有限公司 | A kind of 3D printer for being used to print architectural design model |
| CN107813499A (en) * | 2017-11-27 | 2018-03-20 | 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 | Anti- wire drawing 3D printer |
| CN110154392A (en) * | 2018-02-12 | 2019-08-23 | 三纬国际立体列印科技股份有限公司 | Print spray head, solid of solid is printd nozzle component and three-dimensional printing device |
| CN108582764A (en) * | 2018-04-25 | 2018-09-28 | 锐力斯传动系统（苏州）有限公司 | A kind of 3D printer radiator and extrusion mechanism |
| CN110001050A (en) * | 2019-02-28 | 2019-07-12 | 南京航空航天大学 | A kind of five axis three-dimensional printer nozzle component of extended type water cooling based on reduction interference |
| CN112406097A (en) * | 2020-09-10 | 2021-02-26 | 成都市新美加机械设备制造有限公司 | 3D prints quick wire drive feed unit |
| WO2023168199A2 (en) * | 2022-03-01 | 2023-09-07 | Essentium Ipco, Llc | Heated nozzle assembly for a three-dimensional printer head including fins in shank barrel and nozzle tip |
| CN115157655A (en) * | 2022-07-04 | 2022-10-11 | 上海酷鹰机器人科技有限公司 | Design method of 3D printing overall scheme of large-size special-shaped curved surface sample |
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| CN106738914A (en) | 2017-05-31 |
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