CN104441559A - Screw extrusion device of fusion deposition modeling technology-based 3D printer - Google Patents
Screw extrusion device of fusion deposition modeling technology-based 3D printer Download PDFInfo
- Publication number
- CN104441559A CN104441559A CN201310433954.7A CN201310433954A CN104441559A CN 104441559 A CN104441559 A CN 104441559A CN 201310433954 A CN201310433954 A CN 201310433954A CN 104441559 A CN104441559 A CN 104441559A
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- China
- Prior art keywords
- screw
- reducing gear
- shower nozzle
- screw extrusion
- motor
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Classifications
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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
-
- 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
- B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention relates to a screw extrusion device of a fusion deposition modeling (for short: FDM) technology-based 3D printer, and belongs to the field of 3D printing technologies. The screw extrusion device comprises a speed reduction mechanism, a feeding mechanism, a hot melt spray head, a motor and a supporting plate, wherein the speed reduction mechanism conveys a thermofuse into the hot melt spray head through the feeding mechanism under the driving of the motor, the hot melt spray head heats the thermofuse so as to enable the thermofuse to be fused, the fused thermofuse is extruded from the hot melt spray head through a screw in the speed reduction mechanism which is retarded by a worm and a worm gear. The screw extrusion device is compact in design, accurate to control, large in extrusion pressure, and applicable to thermofuses with different sizes and precisions, the precision of the fusion deposition modeling technology-based 3D printer can be effectively improved, the speed of the fusion deposition modeling technology-based 3D printer can be effectively increased, and the discharge unevenness and plugging phenomena can be effectively reduced.
Description
Technical field
The invention belongs to 3 D-printing forming field, be specifically related to fusion stacking forming technique and (be called for short: the screw extrusion apparatus of 3D printer FDM).
Background technology
FDM fusion stacking shaping 3D printing technique is for raw material with thread hot-melting material, utilize Electric heating that silk material is heated to fusion temperature, under control of the computer, according to cross section information, melt shower nozzle by the Material coating of melting on the table by heat, form a layer cross section of workpiece after cooling, heat is melted shower nozzle and is brought Forward highly, carry out next layer cross section coating again, so successively pile up and form 3 D workpiece.
The extrusion device of the shaping 3D printer of existing FDM fusion stacking all adopts stepper motor output shaft to install wire feed rolls, directly carry out extruding to thermal melting wire material to feed, apply pressure downwards by thermal melting wire material, after making melting, material is extruded by shower nozzle, and its main problem is:
1, because thermal melting wire material front end is by thermal softening, its extrusion pressure is little, shower nozzle wire vent finite rate, causes that shower nozzle bore is in design comparatively large, to print the walking mechanism speed of service comparatively slow, makes the precision of 3D printer and speed be difficult to improve.
2, because thermal melting wire material size is uneven, make thermal melting wire material charging rate and downward pressure uneven, cause shower nozzle wire vent speed uneven, reliability is poor, occurs step-out, and even shower nozzle blocks, and makes thermal melting wire material dimension precision requirement very high.
3, owing to being indirectly apply extrusion pressure, make shower nozzle wire vent be difficult to accurate control, limit the run action walking as stopped silk, accelerating accumulation etc. in print procedure, have impact on precision and the speed of 3D printer, reduce the yield rate of printing.
Summary of the invention
Technical problem to be solved by this invention is: utilize Screw Extrusion technology, accurately can control for providing a kind of based on fusion stacking forming technique 3D printer and be beneficial to the extrusion device improving printing precision and speed.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of screw extrusion apparatus based on fusion stacking forming technique 3D printer, comprise: reducing gear, feed mechanism, heat melt shower nozzle, motor and gripper shoe, described reducing gear is under the driving of described motor, by described feed mechanism, thermo-fuse material being sent into described heat melts in shower nozzle, described heat is melted shower nozzle and thermo-fuse material is heated to fusing point, fusing, to be melted the thermo-fuse material melted shower nozzle from heat by the screw rod in described reducing gear and extrudes.
In the present invention, described reducing gear comprises reduction box upper cover, worm screw, screw rod, worm gear, deceleration box and shaft coupling, the output shaft of stepper motor is connected with worm screw by shaft coupling, spiral shell worm and wheel is rigidly connected, each part is accurately in place by reduction box upper cover and deceleration box, ensures worm and wheel good engagement state.
In the present invention, described feed mechanism comprises feeding tube, hose coupling, holds out against post, bronze bearing, spring, hold out against screw and material guiding tube, hold out against post two ends and put bronze bearing respectively, load in reducing gear, successively two springs and two are held out against screw to load in reducing gear, two springs withstand two bronze bearings respectively, and hose coupling loads reduction box upper cover, feeding tube loads hose coupling, and material guiding tube loads deceleration box.
In the present invention, described motor is stepper motor, is arranged on reducing gear.
In the present invention, described heat is melted shower nozzle, reducing gear and is installed successively on the supporting plate.
In the present invention, the screw head in described reducing gear loads heat and melts shower nozzle.
In the present invention, described material guiding tube is held out against by gripper shoe.
Beneficial effect of the present invention is:
The rotation of screw rod directly applies pressure to the thermo-fuse material after fusing, by adjusting the rotating speed of motor, stall and of short duration reversion, can accurately control wire vent speed and precision, avoiding wire vent uneven phenomenon, can realize the run action of all kinds of complexity of printer.
Motor is after worm screw 12 and worm gear 14 are slowed down, the screw rod of output significantly improves moment of torsion, make extrusion pressure improve a more than order of magnitude, be conducive to using more small-bore shower nozzle to improve printing precision and to increase substantially print speed, avoid shower nozzle to greatest extent and block phenomenon.
Rotate based on screw rod draw in, shaft coupling and to hold out against that post rotation clamp-ons be the feed mechanism that auxiliary, adjustable holds out against screw and has spring servo-actuated, printer is made to be applicable to different size thermo-fuse material, and dimension precision requirement is not had to it, ensure that the synchronous of two pay-off simultaneously.
Accompanying drawing explanation
Fig. 1 is stereogram of the present invention;
Fig. 2 is three-dimensional exploded view of the present invention;
Fig. 3 is the principal section figure of reduction box;
Fig. 4 is the top plan view of reduction box;
Fig. 5 is the three-dimensional exploded view of feed mechanism;
Wherein: 1, reducing gear; 2, feed mechanism; 3, heat melts shower nozzle; 4, motor; 5, gripper shoe; 11, reduction box upper cover; 12, worm screw; 13, screw rod; 14, worm gear; 15, deceleration box; 16, shaft coupling; 21, feeding tube; 22, hose coupling; 23, post is held out against; 24, bronze bearing; 25, spring; 26, screw is held out against; 27, thermo-fuse material; 28, material guiding tube; 41, output shaft.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, based on a screw extrusion apparatus for fusion stacking forming technique 3D printer, comprising: have slow down and screw extrusion effect reducing gear 1, use rotary part in reducing gear and realize feed mechanism 2 that rotation draws in, realize electrical heating and melt shower nozzle 3 with the heat of wire vent, the motor 4 of rotary power and the gripper shoe 5 realizing this device and be connected and be connected with printer are provided for this device.
As shown in accompanying drawing 2, Fig. 3, Fig. 4, described reducing gear 1, under the driving of the output shaft 41 of motor 4, drives worm screw 12 by shaft coupling 16, through engaging of worm screw 12 and worm gear 14, drives and rotates with the rigidly connected screw rod 13 of worm gear 14.
As shown in accompanying drawing 2, Fig. 3, Fig. 4, described worm screw 12 can select single head, and worm gear 14 can select 24 teeth, and speed reducing ratio is 1:24, considers that the transmission efficiency of single start worm 12 and worm gear 14 is about 65%, therefore, the output torque of motor 4 can be improved 15.6 times.
As shown in accompanying drawing 2, described screw rod 13 head loads heat and melts in shower nozzle 3, and the rotation of screw rod 13 in the thermo-fuse material 27 melted, melting shower nozzle 3 for heat provides pressure, the thermo-fuse material 27 of fusing is melted shower nozzle 3 from heat and extrudes.
As shown in accompanying drawing 2, Fig. 5, thermo-fuse material 27 passes by feeding tube 21 and hose coupling 22, enter reducing gear 1, shaft coupling 16 in reducing gear 1 passes with the centre holding out against post 23 be arranged in bronze bearing 24, act on spring 25 apply pressure by holding out against screw 26, when the output shaft 41 of motor 4 drives shaft coupling 16 to rotate, realize first, the light force feed material of thermo-fuse material 27.
As shown in accompanying drawing 2, Fig. 5, the material guiding tube 28 of thermo-fuse material 27 again through being arranged on reducing gear 1, enter in the thread groove of screw rod 13, with the rotation of screw rod 13, heat is drawn in thermo-fuse material 27 rotation melts in shower nozzle 3, melted shower nozzle 3 heat fused by heat, extrude to be melted shower nozzle 3 from heat by screw rod 13.
As shown in accompanying drawing 2, Fig. 5, due to rotating speed and screw rod 13 rotating speed inconsistent, so thermo-fuse material 27 by screw rod 13 rotate draw in time, act on thermo-fuse material 27 feeding based on screw rod 13, hold out against the effect of post 23 due to spring 25, play follow-up action.
As shown in accompanying drawing 2, Fig. 5, hold out against screw 26 and can regulate shaft coupling 16 and hold out against gap between post 23, be applicable to the thermo-fuse material 27. of conventional φ 1.7 ~ φ 3.0 diameter
As shown in accompanying drawing 2, Fig. 5, thermo-fuse material 27 is rotated the elastic gap drawn in characteristic and shaft coupling 16 and hold out against between post 23 by screw rod 13, to the dimensional accuracy not requirement of thermo-fuse material 27.
As shown in Figure 1, motor 4 selects 42mm, 1.8 ° of stepper motors, and drive circuit adopts 1/8 segmentation.
In the present embodiment, adopting the rotation of screw rod 13 directly to apply pressure to the thermo-fuse material 27 after fusing, achieving by controlling motor 4 operating parameters, accurately control the speed that prints and precision; Adopt the deceleration of worm screw 12 and worm gear 14, the moment of torsion of the screw rod 13 of output significantly improves, and makes extrusion pressure improve more than ten times; Adopt to rotate based on screw rod 13 draw in, shaft coupling 16 and hold out against post 23 rotation to clamp-on be auxiliary feed mechanism 2, make printer be applicable to different size and precision thermo-fuse material 27.
In this illustrates; description is made with regard to particular instance; only in explanation technical thought of the present invention and a kind of implementation; and understand content of the present invention and implementation for those skilled in the art; can not limit the scope of the invention; all embodiments of carrying out according to core essence of the present invention change and the increase and decrease of function, all should in the protection domain of patent of the present invention.
Claims (7)
1. the screw extrusion apparatus based on fusion stacking forming technique 3D printer, it is characterized in that: reducing gear (1), feed mechanism (2), heat melts shower nozzle (3), motor (4) and gripper shoe (5), described reducing gear (1) is under the driving of described motor (4), by described feed mechanism (2), thermo-fuse material (27) being sent into described heat melts in shower nozzle (3), described heat is melted shower nozzle (3) and thermo-fuse material (27) is heated to fusing point, melt, by the screw rod (13) in described reducing gear (1) the thermo-fuse material (27) melted melted shower nozzle (3) from heat and extrude.
2. screw extrusion apparatus according to claim 1, it is characterized in that: reducing gear (1) comprises reduction box upper cover (11), worm screw (12), screw rod (13), worm gear (14), deceleration box (15) and shaft coupling (16), the output shaft (41) of motor (4) is connected with worm screw (12) by shaft coupling (16), screw rod (13) and worm gear (14) are rigidly connected, each part is accurately in place by reduction box upper cover (11) and deceleration box (15), ensure worm screw (12) and worm gear (14) good engagement state.
3. screw extrusion apparatus according to claim 1, it is characterized in that: feed mechanism (2) comprises feeding tube (21), hose coupling (22), hold out against post (23), bronze bearing (24), spring (25), hold out against screw (26) and material guiding tube (28), hold out against post (23) two ends and put bronze bearing (24) respectively, load in reducing gear (1), successively two springs (25) and two being held out against screw (26) loads in reducing gear (1), two springs (25) withstand two bronze bearings (24) respectively, hose coupling (22) loads reduction box upper cover (11), feeding tube (21) loads hose coupling (22), material guiding tube (28) loads deceleration box (15).
4. screw extrusion apparatus according to claim 1, is characterized in that: motor (4) is stepper motor, is arranged on reducing gear (1).
5. screw extrusion apparatus according to claim 1, is characterized in that: heat melts shower nozzle (3), reducing gear (1) is arranged in gripper shoe (5) successively.
6. screw extrusion apparatus according to claim 1, is characterized in that: screw rod (13) head in reducing gear (1) loads heat and melts shower nozzle (3).
7. screw extrusion apparatus according to claim 1, is characterized in that: material guiding tube (28), is held out against by gripper shoe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433954.7A CN104441559A (en) | 2013-09-23 | 2013-09-23 | Screw extrusion device of fusion deposition modeling technology-based 3D printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310433954.7A CN104441559A (en) | 2013-09-23 | 2013-09-23 | Screw extrusion device of fusion deposition modeling technology-based 3D printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104441559A true CN104441559A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310433954.7A Pending CN104441559A (en) | 2013-09-23 | 2013-09-23 | Screw extrusion device of fusion deposition modeling technology-based 3D printer |
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| Country | Link |
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| CN (1) | CN104441559A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110450544A (en) * | 2019-09-12 | 2019-11-15 | 武汉必盈生物科技有限公司 | A kind of new screw extruded type print head |
| CN111907059A (en) * | 2019-05-08 | 2020-11-10 | 高雄科技大学 | Laminated forming system |
-
2013
- 2013-09-23 CN CN201310433954.7A patent/CN104441559A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907059A (en) * | 2019-05-08 | 2020-11-10 | 高雄科技大学 | Laminated forming system |
| CN110450544A (en) * | 2019-09-12 | 2019-11-15 | 武汉必盈生物科技有限公司 | A kind of new screw extruded type print head |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
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| WD01 | Invention patent application deemed withdrawn after publication |