CN203109234U - Multi-nozzle laser 3D printing device - Google Patents
Multi-nozzle laser 3D printing device Download PDFInfo
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- CN203109234U CN203109234U CN 201320154364 CN201320154364U CN203109234U CN 203109234 U CN203109234 U CN 203109234U CN 201320154364 CN201320154364 CN 201320154364 CN 201320154364 U CN201320154364 U CN 201320154364U CN 203109234 U CN203109234 U CN 203109234U
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Abstract
The utility model discloses a multi-nozzle laser 3D printing device which comprises a laser generator, a laser nozzle, a mechanical arm and a workbench, wherein the laser nozzle comprises a laser head and a powder nozzle assembly, the powder nozzle assembly comprises a connecting base, a turntable and at least two powder nozzles, the turntable is rotationally sleeved on the periphery of the connecting base, the connecting base is provided with a laser through hole, the laser through hole is coaxially communicated with a laser jet hole of the laser head, the powder nozzles are detachably installed on the turntable and are circumferentially and evenly distributed relative to the rotating center of the turntable, any one powder nozzle is coaxially communicated with the laser jet hole when rotating to the working station, and a positioning device is installed between the turntable and the connecting base. The laser nozzle of the multi-nozzle laser 3D printing device comprises multiple powder nozzles which can be used in turn, the multi-nozzle laser 3D printing device conducts printing through various kinds of metal powder on the condition that the laser nozzle is not replaced, and 3D printing requirements of metal parts made of stepped performance materials are met.
Description
Technical field
The utility model relates to a kind of laser 3D PRN device, refers to a kind of many shower nozzles laser 3D PRN device especially.
Background technology
The 3D printing technique is a kind of emerging forming method, its core is the combination that the complicated 3D body of required Forming Workpiece is converted into simple 2D cross section by slicing treatment, therefore needn't adopt traditional machining tool and tool and mould, three-dimensional computer aided design models according to workpiece, on computer-controlled fast forming machine, along short transverse layer by layer deposition material, a series of 2D cross section lamella of Forming Workpiece, and make between lamella and the lamella bondingly mutually, finally be piled into 3 D workpiece.And traditional used material of 3D printing technique is plastics, photosensitive resin, nylon, organic materials such as paraffin, and can't use the moulding of metalwork, go into seriously its reason, on technology, needing to improve, laser 3D PRN device also needs to improve, traditional laser 3D PRN device generally comprises laser generator, laser printhead, mechanical arm and workbench, the effect of laser generator is to produce laser, this laser printhead is installed on the mechanical arm, mechanical arm can be done around workbench laterally, mobile longitudinally, whole 3D print procedure drives laser printhead by mechanical arm and finishes at workbench.Laser printhead mainly comprises laser head and powder nozzle component; this powder nozzle component includes only a powder shower nozzle; the powder shower nozzle connects powder feeding pipeline and protective gas pipeline; and because more for the metal dust kind of forming metal spare; metalwork may utilize different metal dusts to print in forming process at the different parts of metalwork; to finish the printing of ladder performance materials metalwork; need use different metal dusts when perhaps printing different metal spare; obviously; finish above-mentioned work if utilize present 3D PRN device; need so frequently to change laser printhead, had a strong impact on the 3D printing effect, reduced the 3D printing effect.
The utility model content
Technical problem to be solved in the utility model is: a kind of many shower nozzles laser 3D PRN device is provided, laser printhead in this 3D PRN device has a plurality of powder shower nozzles, and a plurality of powder shower nozzles can use by turns, thereby make the 3D PRN device under the situation of not changing laser printhead, use multiple metal dust to print, satisfy the printing requirement of ladder performance materials metalwork 3D.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of many shower nozzles laser 3D PRN device, comprise laser generator, laser printhead, mechanical arm and workbench, this laser printhead is installed on the mechanical arm, described laser printhead comprises laser head and powder nozzle component, this powder nozzle component comprises Connection Block, rotating disk, and at least two powder shower nozzles, this Connection Block is connected with laser head, described dial rotation is sleeved on the periphery of Connection Block, described Connection Block is provided with laser and passes through the hole, this laser is by the laser spray-hole coaxial communication of hole and laser head, described at least two powder shower nozzles detachably are installed on the rotating disk, this powder shower nozzle is with respect to the pivot circumference uniform distribution of rotating disk, when arbitrary powder shower nozzle rotates to the work station all with described laser spray-hole coaxial communication, be provided with the locking powder shower nozzle positioner coaxial with the laser spray-hole between described rotating disk and the Connection Block.
Wherein, described positioner comprises first positioning ring groove, second positioning ring groove, centring ring, positioning bead and locating hole, described first positioning ring groove is arranged on the Connection Block periphery, second positioning ring groove is arranged at week and corresponding with the first positioning ring groove position in the rotating disk, and first positioning ring groove and the cooperation of second positioning ring groove have formed the operation passage and be used for installing positioning bead; Described centring ring is fixed in first positioning ring groove, described centring ring is provided with elastic force-applying projection radially, the quantity of this elastic force-applying projection equates with powder shower nozzle quantity, described elastic force-applying projection is uniform with respect to the center circumferential of centring ring, and one of them elastic force-applying projection is corresponding by the hole site with laser; The bottom land of described second positioning ring groove is provided with and equates with powder shower nozzle number and position locating hole one to one, the number of described positioning bead is at least one, this positioning bead is movably set in first positioning ring groove and second positioning ring groove, to the distance between the bottom land of second positioning ring groove, described locating hole can hold the part pearl face of positioning bead to the diameter of described positioning bead greater than the outer face of elastic force-applying projection.
As a kind of preferred scheme, the quantity of described positioning bead equates that with the quantity of powder shower nozzle each positioning bead lays respectively between the adjacent two elastic force-applying projectioies.
As a kind of preferred scheme, the number of described powder shower nozzle is three.
As a kind of preferred scheme, the angle between the end face of each powder shower nozzle and rotating disk is 70 °
As a kind of preferred scheme, described powder shower nozzle is that bolt is connected with detachable mounting means between the rotating disk.
As a kind of preferred scheme, described Connection Block is provided with installation cavity, is rotatablely equipped with driving gear in the described installation cavity; The inner peripheral surface of described rotating disk is provided with a circle internal tooth, described driving gear and a circle internal tooth engagement, and described driving gear is driven by the power set that are installed on the Connection Block.
As a kind of preferred scheme, described power set are motor, and the output shaft of this motor is connected with the gear shaft of driving gear; This motor is arranged in the installation cavity, and the protective cover that motor is protected is installed on the Connection Block.
As a kind of preferred scheme, screw thread is equipped with joint sleeve on the described Connection Block, and the endoporus of this joint sleeve and described laser are by the hole coaxial communication, and described laser head inserts in the joint sleeve fixedlys connected with joint sleeve.
As a kind of preferred scheme, the matsurface of being convenient to hand-held rotation is set on the periphery of described rotating disk.
After having adopted technique scheme; effect of the present utility model is: because this powder nozzle component comprises Connection Block; rotating disk; and at least two powder shower nozzles; this Connection Block is connected with laser head; described dial rotation is sleeved on the periphery of Connection Block; the laser that described Connection Block is provided with the laser spray-hole coaxial communication of laser head passes through the hole; described at least two powder shower nozzles detachably are installed on the rotating disk; this powder shower nozzle is with respect to the pivot circumference uniform distribution of rotating disk; when arbitrary powder shower nozzle rotates to the work station all with described laser spray-hole coaxial communication; be provided with the locking powder shower nozzle positioner coaxial with the laser spray-hole between described rotating disk and the Connection Block; therefore; rotate rotating disk and can drive the rotation of powder shower nozzle; and the positioner lockable powder shower nozzle between rotating disk and the Connection Block; make arbitrary powder shower nozzle all can with the laser spray-hole coaxial communication of laser head; thereby realized that a plurality of powder shower nozzles use by turns; and can connect powder feeding pipeline and protective gas pipeline on each powder shower nozzle; use multiple metal dust to print under the situation of laser printhead need not to change like this; improve effect and efficient that 3D prints, satisfy the requirement of the 3D printing shaping of metalwork.
Again because described positioner comprises first positioning ring groove, second positioning ring groove, centring ring, positioning bead and locating hole, described first positioning ring groove is arranged on the Connection Block periphery, second positioning ring groove is arranged at week and corresponding with the first positioning ring groove position in the rotating disk, and first positioning ring groove and the cooperation of second positioning ring groove have formed the operation passage and be used for installing positioning bead; Described centring ring is fixed in first positioning ring groove, the bottom land of described second positioning ring groove is provided with and equates with powder shower nozzle number and position locating hole one to one, described centring ring is provided with elastic force-applying projection radially, the quantity of this elastic force-applying projection equates with powder shower nozzle quantity, described elastic force-applying projection is uniform with respect to the center circumferential of centring ring, and one of them elastic force-applying projection is corresponding by the hole site with laser; The number of described positioning bead is at least one, this positioning bead is movably set in first positioning ring groove and second positioning ring groove, to the distance between the bottom land of second positioning ring groove, described locating hole can hold the part pearl face of positioning bead to the diameter of described positioning bead greater than the outer face of elastic force-applying projection.Cooperate the operation passage that has constituted positioning bead in first positioning ring groove and second positioning ring groove, this positioning bead is in the operation passage and between adjacent two elastic force-applying projectioies the time, rotating disk can rotate freely, and rotating disk is in rotating process, positioning bead is driven in the operation passage by the elastic force-applying projection and rolls, part pearl face until positioning bead enters in the locating hole, at this moment, elastic force-applying projection strain compresses positioning bead, guarantee that the powder shower nozzle is corresponding with the elastic force-applying raised position, and then powder shower nozzle and laser are by the hole coaxial communication, rotate rotating disk and apply external force this moment again, the elastic force-applying projection pressed positioning bead to separate with it with regard to further strain so, and like this, positioning bead can move in the operation passage of first positioning ring groove and second positioning ring groove composition again.This positioning device structure is simple, reasonable, and accurate positioning also is easy to safeguard.
Again because the quantity of described positioning bead equates that with the quantity of powder shower nozzle each positioning bead lays respectively between the adjacent two elastic force-applying projectioies, like this, when the location, each positioning bead part pearl face all can fall in the corresponding locating hole, locatees more reliable, fault rate is lower, reduces maintenance frequency.
Because described Connection Block is provided with installation cavity, be rotatablely equipped with driving gear in the described installation cavity again; The inner peripheral surface of described rotating disk is provided with a circle internal tooth, described driving gear and a circle internal tooth engagement, and described driving gear is driven by the power set that are installed on the Connection Block.Can realize the automatic rotation of rotating disk like this, the efficient that laser 3D is printed is higher.
Because the matsurface of being convenient to hand-held rotation is set on the periphery of described rotating disk, be convenient to the hand-held rotation of operator again.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the front schematic perspective view of the utility model embodiment;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the perspective view of the powder nozzle component among the utility model embodiment;
Fig. 4 is the perspective view of the Connection Block among the utility model embodiment;
Fig. 5 is the sectional perspective structural representation of the centring ring among the utility model embodiment;
In the accompanying drawing: 1. Connection Block; 11. installation cavity; 12. laser passes through the hole; 13. first positioning ring groove; 14. first ball grooves; 2. rotating disk; 21. matsurface; 22. internal tooth; 23. sleeve; 24. locating hole; 25. second positioning ring groove; 26. second ball grooves; 3. powder shower nozzle; 31. powder feeding hole; 32. air admission hole; 4. driving gear; 5. motor; 6. joint sleeve; 7. bolt; 8. centring ring; 81. elastic force-applying projection.
The specific embodiment
Below by specific embodiment the utility model is described in further detail.
As shown in Figure 1 and Figure 2, a kind of many shower nozzles laser 3D PRN device, comprise laser generator, laser printhead, mechanical arm, workbench and the control system of controlling whole PRN device, this laser generator, mechanical arm, workbench, control system are not all drawn in the accompanying drawings; This laser generator can be the optical-fiber laser generator, also can be the carbon dioxide laser generator.This laser printhead is installed on the mechanical arm, control system control mechanical arm can be around workbench laterally, vertically freely exercise, and laser printhead carries out the 3D printing by the mechanical arm drive at workbench.
As shown in Figure 3, described laser printhead comprises laser head and powder shower nozzle 3 assemblies, this powder nozzle component comprises Connection Block 1, rotating disk 2 and at least two powder shower nozzles 3, as shown in Figure 4, this Connection Block 1 is cylindric, one end end face and self axis normal, and other end and self axes intersect; Offer laser on the Connection Block 1 by hole 12, this laser passes through hole 12 equally and self axially intersects, and laser arranges internal thread by hole 12, the hole internal thread connects a joint sleeve 6, the laser head (not shown) is then fixedlyed connected with joint sleeve 6, and the laser spray-hole of laser head and laser are by hole 12 coaxial communication; Described rotating disk 2 comprises a cylinder ring, the bottom of cylinder ring arranges a base plate, be evenly distributed in the through hole that equates with powder shower nozzle 3 numbers on the base plate, being convenient to laser passes, each through hole arranges a sleeve 23, powder shower nozzle 3 inserts in the sleeve 23 and by bolt 7 and connects, and has realized the detachable installation of powder shower nozzle 3.This powder shower nozzle 3 can also with sleeve between adopt and be threaded or other detachable mounting means.The matsurface 21 of being convenient to hand-held rotation is set on the periphery of described rotating disk 2.Two circles, second ball grooves 26 is set in the cylinder ring in week, corresponding, two circle first ball grooves 14, the first ball grooves 14 are set on the outer peripheral face of Connection Block 1, second ball grooves 26 cooperates and in establish ball, the periphery that described rotating disk 2 is sleeved on Connection Block 1 has realized rotating and has installed.Wherein, the number of powder shower nozzle 3 is preferably three, angle between the end face of each powder shower nozzle 3 and rotating disk 2 is 70 °, and this powder shower nozzle 3 is with respect to the pivot circumference uniform distribution of rotating disk 2, when arbitrary powder shower nozzle 3 rotates to the work station all with described laser spray-hole coaxial communication.This powder shower nozzle 3 is generally column structure, at powder shower nozzle 3 outer peripheral faces powder feeding hole 31 and air admission hole 32 are set, powder shower nozzle 3 inside are provided with axial through hole, are convenient to laser and pass, and also are provided with the powder feeding passage that is communicated with powder feeding hole 31, the gas passage that is communicated with air admission hole 32 simultaneously; Powder shower nozzle 3 inside also arrange the eyeglass with its axis normal in addition, prevent that powder from flowing backwards.
Be provided with locking powder shower nozzle 3 positioner coaxial with the laser spray-hole between described rotating disk 2 and the Connection Block 1.Wherein, described positioner comprises first positioning ring groove 13, second positioning ring groove 25, centring ring 8, positioning bead (not shown) and locating hole 24, described first positioning ring groove 13 is arranged on the periphery face of cylinder of Connection Block 1, number is at least one, second positioning ring groove 25 is arranged at week and all corresponding with first positioning ring groove, 13 quantity and position in the rotating disk 2, first positioning ring groove 13 and 25 cooperations of second positioning ring groove have formed the operation passage and have been used for positioning bead is installed, and are convenient to the positioning bead operation; As shown in Figure 5, described centring ring 8 is fixed in first positioning ring groove 13, generally adopts bearing pin to fix, and is corresponding, in centring ring 8 and first positioning ring groove 13 pin-and-hole is set all.Described centring ring 8 is provided with elastic force-applying projection 81 radially, the quantity of this elastic force-applying projection 81 equates with powder shower nozzle 3 quantity, also be three, described elastic force-applying projection 81 is uniform with respect to the center circumferential of centring ring 8, one of them elastic force-applying projection 81 is corresponding by 12 positions, hole with laser, and centring ring 8 can adopt the branch body structure, the open loop circle is fixed on earlier in first positioning ring groove 13, and then utilizes brace to make it constitute a closed loop circle two ends connection of centring ring 8; Be convenient to the installation of centring ring 8 like this, the bottom land of described second positioning ring groove 25 is provided with and equates with powder shower nozzle 3 numbers and position locating hole 24 one to one, the number of described positioning bead is at least one, preferably, the number of the number of positioning bead and powder shower nozzle 3 is the same also to be three, this positioning bead is movably set in the operation passage of first positioning ring groove 13 and second positioning ring groove, 25 formations, to the distance between the bottom land of second positioning ring groove 25, described locating hole 24 can hold the part pearl face of positioning bead to the diameter of described positioning bead greater than the outer face of elastic force-applying projection 81.The pre-installation site of each positioning bead is the target phase between two adjacent elastic force-applying projectioies 81 all.
In addition, the upper surface of described Connection Block 1 is provided with installation cavity 11, is rotatablely equipped with driving gear 4 in the described installation cavity 11; The inner peripheral surface of described rotating disk 2 is provided with a circle internal tooth 22, described driving gear 4 and a circle internal tooth 22 engagements, and described driving gear 4 is driven by the power set that are installed on the Connection Block 1.Described power set are motor 5, and the output shaft of this motor 5 is connected with the gear shaft of driving gear 4; This motor 5 is arranged in the installation cavity 11, and on the Connection Block 1 protective cover that motor 5 is protected is installed.
The course of work of the present utility model is: at first laser head is inserted in the joint sleeve 6 fixing, rotate rotating disk 2, because the existence of ball, the rotation of rotating disk 2 is very smooth and easy, and three positioning beads are arranged in first positioning ring groove 13, second positioning ring groove 25 cooperates the operation passage of forming, and each positioning bead is all between two adjacent elastic force-applying projectioies 81.When rotating disk 2 rotates, the running status of three positioning beads is identical, positioning bead is moved in the operation passage against driving it by elastic force-applying projection 81, move in the locating hole 24 until positioning bead, this moment, the part pearl face of positioning bead entered into locating hole 24, and the elastic force of elastic force-applying projection 81 compresses positioning bead, thus the locking of completing place; And at this moment, laser head, laser be by hole 12, one of them powder shower nozzle 3 three's coaxial communication, this moment the laser generator generation laser of can working, mechanical arm drives laser printhead to carry out 3D in the workbench operation and prints.When needs use the different metal powder, motor 5 moves again, driving gear 4 drives rotating disk 2 and rotates, this rotatory force forces elastic force-applying projection 81 further strains, thereby pressed positioning bead to separate with it, like this, positioning bead is driven in the operation passage by elastic force-applying projection 81 again and moves, after positioning bead part pearl face enters into next locating hole 24, stop, thereby the rotation of having finished powder shower nozzle 3 is changed.Situation according to actual 3D printing, can select suitable powder shower nozzle 3 and suitable metal dust to print, under the situation of not changing laser printhead, use multiple metal dust to print, improve effect and efficient that 3D prints, satisfy the requirement of the 3D printing shaping of metalwork.
As from the foregoing; this embodiment has just put down in writing a kind of concrete structure mode of this 3D PRN device; for example; the quantity of above-mentioned positioning bead can also be greater than the quantity of powder shower nozzle 3; under the situation of not considering the laser printhead size; the quantity of powder shower nozzle 3 also can surpass three in fact, and any technical staff is equal to the technical scheme of replacing or changing according to technical scheme of the present invention and inventive concept and should falls within protection scope of the present invention within the technical scope that the present invention discloses.
Claims (10)
1. the 3D of shower nozzle laser more than one kind PRN device, comprise laser generator, laser printhead, mechanical arm and workbench, it is characterized in that: described laser printhead comprises laser head and powder nozzle component, this powder nozzle component comprises Connection Block, rotating disk, and at least two powder shower nozzles, this Connection Block is connected with laser head, described dial rotation is sleeved on the periphery of Connection Block, described Connection Block is provided with laser and passes through the hole, this laser is by the laser spray-hole coaxial communication of hole and laser head, described at least two powder shower nozzles detachably are installed on the rotating disk, this powder shower nozzle is with respect to the pivot circumference uniform distribution of rotating disk, when arbitrary powder shower nozzle rotates to the work station all with described laser spray-hole coaxial communication, be provided with the locking powder shower nozzle positioner coaxial with the laser spray-hole between described rotating disk and the Connection Block.
2. a kind of many shower nozzles laser 3D PRN device as claimed in claim 1, it is characterized in that: described positioner comprises first positioning ring groove, second positioning ring groove, centring ring, positioning bead and locating hole, described first positioning ring groove is arranged on the Connection Block periphery, second positioning ring groove is arranged at week and corresponding with the first positioning ring groove position in the rotating disk, and first positioning ring groove and second positioning ring groove cooperate formation operation passage to be used for installing positioning bead; Described centring ring is fixed in first positioning ring groove, described centring ring is provided with elastic force-applying projection radially, the quantity of this elastic force-applying projection equates with powder shower nozzle quantity, described elastic force-applying projection is uniform with respect to the center circumferential of centring ring, and one of them elastic force-applying projection is corresponding by the hole site with laser; The bottom land of described second positioning ring groove is provided with and equates with powder shower nozzle number and position locating hole one to one, the number of described positioning bead at least one, this positioning bead is movably set in first positioning ring groove and second positioning ring groove, to the distance between the bottom land of second positioning ring groove, described locating hole can hold the part pearl face of positioning bead to the diameter of described positioning bead greater than the outer face of elastic force-applying projection.
3. a kind of many shower nozzles laser 3D PRN device as claimed in claim 2, it is characterized in that: the quantity of described positioning bead equates that with the quantity of powder shower nozzle each positioning bead lays respectively between the adjacent two elastic force-applying projectioies.
4. a kind of many shower nozzles laser 3D PRN device as claimed in claim 3, it is characterized in that: the number of described powder shower nozzle is three.
5. a kind of many shower nozzles laser 3D PRN device as claimed in claim 4, it is characterized in that: the angle between the end face of each powder shower nozzle and rotating disk is 70 °.
6. a kind of many shower nozzles laser 3D PRN device as claimed in claim 5 is characterized in that: described powder shower nozzle is that bolt is connected with detachable mounting means between the rotating disk.
7. as each described a kind of many shower nozzles laser 3D PRN device of claim 1 to 6, it is characterized in that: described Connection Block is provided with installation cavity, is rotatablely equipped with driving gear in the described installation cavity; The inner peripheral surface of described rotating disk is provided with a circle internal tooth, described driving gear and a circle internal tooth engagement, and described driving gear is driven by the power set that are installed on the Connection Block.
8. a kind of many shower nozzles laser 3D PRN device as claimed in claim 7, it is characterized in that: described power set are motor, the output shaft of this motor is connected with the gear shaft of driving gear; This motor is arranged in the installation cavity, and the protective cover that motor is protected is installed on the Connection Block.
9. a kind of many shower nozzles laser 3D PRN device as claimed in claim 8, it is characterized in that: screw thread is equipped with joint sleeve on the described Connection Block, the endoporus of this joint sleeve and described laser are by the hole coaxial communication, and described laser head inserts in the joint sleeve fixedlys connected with joint sleeve.
10. a kind of many shower nozzles laser 3D PRN device as claimed in claim 9 is characterized in that: the matsurface of being convenient to hand-held rotation is set on the periphery of described rotating disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154364 CN203109234U (en) | 2013-03-30 | 2013-03-30 | Multi-nozzle laser 3D printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320154364 CN203109234U (en) | 2013-03-30 | 2013-03-30 | Multi-nozzle laser 3D printing device |
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| CN203109234U true CN203109234U (en) | 2013-08-07 |
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| CN 201320154364 Expired - Lifetime CN203109234U (en) | 2013-03-30 | 2013-03-30 | Multi-nozzle laser 3D printing device |
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| CN104729439B (en) * | 2013-12-20 | 2018-06-05 | 赫克斯冈技术中心 | There is the coordinate measuring machine of high-precision 3D printing |
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| CN104552961A (en) * | 2015-02-05 | 2015-04-29 | 邢鹏达 | Annular 3D printer |
| CN104874795A (en) * | 2015-06-08 | 2015-09-02 | 荆红 | Multi-nozzle mechanism |
| CN104985817A (en) * | 2015-07-14 | 2015-10-21 | 成都思维智造科技有限公司 | Nozzle-adjustable spray head structure of three-dimensional printer |
| CN104985817B (en) * | 2015-07-14 | 2017-04-05 | 成都思维智造科技有限公司 | A kind of nozzle-adjustable 3D printer nozzle structure |
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| CN105965898A (en) * | 2016-07-04 | 2016-09-28 | 吉林省夏唯自动化工程有限公司 | 3D printer sprayer with rotation switching function |
| US10338742B2 (en) | 2017-03-02 | 2019-07-02 | Microsoft Technology Licensing, Llc | Detection method for a digitizer |
| US11400516B2 (en) | 2017-03-20 | 2022-08-02 | Stratasys Ltd. | Method and system for additive manufacturing with powder material |
| CN110405138A (en) * | 2019-07-02 | 2019-11-05 | 南京理工大学 | A kind of moltening mold castings wax-pattern 3D printer |
| CN110481025A (en) * | 2019-09-17 | 2019-11-22 | 山东智汇新谷科技企业孵化器有限公司 | A kind of 3D printer spray head that can replace nozzle automatically |
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