CN105459397A - Leak-proof spraying head for fused deposition molding of 3D (Three-Dimensional) printer - Google Patents
Leak-proof spraying head for fused deposition molding of 3D (Three-Dimensional) printer Download PDFInfo
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- CN105459397A CN105459397A CN201510939843.2A CN201510939843A CN105459397A CN 105459397 A CN105459397 A CN 105459397A CN 201510939843 A CN201510939843 A CN 201510939843A CN 105459397 A CN105459397 A CN 105459397A
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Abstract
The invention discloses a leak-proof spraying head for fused deposition molding of a 3D printer. The leak-proof spraying head comprises a material guide pipe, a heating block, a nozzle and a feeding mechanism, wherein a feeding passage is arranged on the material guide pipe; the nozzle is fixedly arranged at the lower end of the material guide pipe; the spraying opening of the nozzle is communicated with the feeding passage of the material guide pipe; the material guide pipe sleeves inside the heating block and is fixedly connected with the heating block; the spraying head comprises a leak-proof mechanism; the leak-proof mechanism comprises a baffle capable of closing a discharging hole of the material guide pipe; a guide groove is formed in the bottom end of the material guide pipe; the baffle is mounted inside the guide groove and is in clearance fit with the guide groove; the baffle is connected with a stepping motor through a driving mechanism; the driving mechanism is used for transforming rotation of the stepping motor into translational motion of the baffle along the radial direction of the material guide pipe; the driving mechanism is also used for driving the baffle to be closed or opening the discharging hole of the material guide pipe in a stepping way. The leak-proof spraying head disclosed by the invention has the advantage that the spraying head is free of leakage after printing is finished.
Description
Technical field
The present invention relates to a kind of drip-proof shower nozzle for fused glass pellet 3D printer.
Technical background
3D printing technique is also known as rapid shaping (RapidPrototype) technology, be called for short RP technology, be divided into selective laser sintering (SLS) according to the difference of molding mode, fused glass pellet (FDM), Stereolithography (SLA), laminated solid mass shaping (LOM) etc.The maximum difference of fused glass pellet (FDM) rapid prototyping system and SLA, LOM, SLS system is that FDM does not adopt laser system.FDM is by thread heat-fusible materials (thermo-fuse) heat fused, gushes out by squeezing with the shower nozzle of a minute nozzle.From nozzle ejection after hot melt material fusing, be deposited on and make on material that panel or front one deck solidified, temperature, lower than starting solidification after solidification temperature, forms final finished by the accumulation layer by layer of material.
Existing fused glass pellet (FDM) 3D printer ubiquity the problem of shower nozzle water clock, the smooth degree of shower nozzle water clock ectocrine surface, reduces print quality.The structure of shower nozzle is normally: be made up of passage, heat block, nozzle, radiating block and feed mechanism.Thermo-fuse passes through the feeding-passage in passage under the promotion of feed mechanism.Passage has external screw thread, and heat block has internal thread, and passage is enclosed within heat block, both are connected by screw thread pair.Have internal thread hole bottom passage, nozzle is arranged on passage bottom center by screw thread pair.Heat up after heat block energising, the thermo-fuse in fusing passage, the thermo-fuse after fusing sprays from nozzle under the lasting promotion of feeding feed mechanism.Fused glass pellet technique generally adopts low melting point filamentary material, as PLA and ABS plastic thermo-fuse, often because the high-temperature area of nozzle causes too greatly the thermo-fuse fusing in nozzle too many, the thermo-fuse melted can trickle downwards under gravity naturally, causes nozzle water clock.And the direct result of nozzle water clock is exactly cause out-of-flatness at the outer surface of printing objects.When to print simultaneously several there is no a printing objects contacted time, there will be between printing objects and have wire drawing phenomenon.
Summary of the invention
In order to overcome the dripping problems of the shower nozzle of existing fused glass pellet (FDM) 3D printer, the invention provides a kind of drip-proof shower nozzle.
For a drip-proof shower nozzle for fused glass pellet 3D printer, comprise passage, heat block, nozzle and feed mechanism, passage is arranged the feeding-passage of thermo-fuse, nozzle is fixed on the lower end of passage, and the spout of nozzle is communicated with the feeding-passage of passage; Passage is set in heat block, and passage is fixedly connected with heat block; It is characterized in that: shower nozzle has Anti-drip-leakage mechanism, Anti-drip-leakage mechanism comprises the baffle plate can closing passage discharging opening, and passage bottom is provided with guide groove, and baffle plate is arranged in guide groove, baffle plate and guide groove matched in clearance; Baffle plate is connected with stepper motor by transmission mechanism, and the rotation of stepper motor is converted into the translation of plate washer along passage radial direction by transmission mechanism, and transmission mechanism drives baffle plate to close or open the discharging opening of passage steppingly.
Such as, transmission mechanism is pinion and rack, and gear is connected with stepper motor, and one end and the baffle plate of tooth bar are fixed, and promotes baffle plate translation.
Further, transmission mechanism comprises the friction pulley be connected with stepper motor, the slide block contacted with friction pulley, the guide rail of guide runner motion and the connecting rod of connection sliding block and baffle plate; Force of sliding friction between friction pulley and slide block makes slide block along guide rail translation.The Movement transmit of slide block to baffle plate, thus is made baffle plate translation by connecting rod, reaches closed or opens the object of passage discharging opening.
Further, stepper motor, friction pulley, slide block and guide rails assembling are indoor in baffle controls; The base plate of baffle controls room is provided with the through hole allowing connecting rod to pass, and connecting rod enough baffle plates of the distance of translation in through hole close or open the discharging opening of passage.That is, the width of through hole is greater than the stroke distances that connecting rod makes baffle plate move, and through hole can not hinder connecting rod to drive baffle plate to close or open the discharging opening of passage.
Further, baffle controls room is installed on below shower nozzle grip block, and baffle controls room is enclosed within heat block periphery.
Further, passage is provided with the feed mechanism of thermo-fuse, feed mechanism comprises initiatively feed wheel, driven feed wheel and feeding motor, initiatively feed wheel is connected with feeding motor, passage is provided with initiatively feed wheel window and driven feed wheel window, initiatively feed wheel and driven feed wheel stretch in passage through respective window, initiatively feed wheel and driven feed wheel clamping thermo-fuse.Feeding motor drives initiatively feed wheel to rotate, and under the effect of force of sliding friction and force of rolling friction, initiatively feed wheel and driven feed wheel order about the top charging aperture downwards discharging opening motion of thermo-fuse from passage.
Further, passage is installed with shower nozzle grip block, the lower surface of shower nozzle grip block contacts with heat block; Initiatively feed wheel and driven feed wheel are installed on shower nozzle grip block, and shower nozzle grip block hollow forms the cavity holding driven feed wheel and active feed wheel, and feeding motor is fixed on shower nozzle grip block.Utilize shower nozzle grip block shower nozzle can be installed on 3D printer.Feeder electrode is fixed on the outer wall of shower nozzle grip block.
Further, the lower surface of shower nozzle grip block props up heat block.The material that the wall thermal diffusivity that shower nozzle grip block and heat block can be pushed against is good makes, thus makes shower nozzle grip block be used as radiating piece.
Advantage of the present invention is: 1, arrange Anti-drip-leakage mechanism, after printing completes, stepper motor and transmission mechanism make baffle plate close the discharging opening of passage, the thermo-fuse melted in passage is stoped to fall, the heat-fusible materials remained in nozzle is few owing to measuring, and be no longer subject to downward pressure, the frictional force between nozzle can be relied on to remain in nozzle and not drip downwards.
2, use friction pulley to drive slide block provide baffle plate to close along the mode of slide or open the driving force of passage discharging opening, the volume of transmission mechanism is little, and the space taken is little; And the every stepping of stepper motor once, friction pulley drives the distance of slide block translation accurately to learn, utilizes step-by-step movement accumulative effect accurately to control the distance of baffle plate motion, avoids baffle plate excess impact passage and cause passage to damage.
3, shower nozzle grip block is not only as the connector between shower nozzle and 3D printer, and can be used in installing the feed mechanism of thermo-fuse and the baffle controls room of Anti-drip-leakage mechanism, and can play the effect of heat radiation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of a-quadrant in Fig. 1;
Fig. 3 is workflow diagram of the present invention.
1, heat block, 2, shower nozzle grip block, 3, driven feed wheel, 4, passage, 5, initiatively feed wheel, 6, feeding motor, 7, baffle controls room, 8, stepper motor, 9, friction pulley, 10, slide block, 11, guide rail, 12, baffle plate, 13, connecting rod, 14, nozzle.
Detailed description of the invention
A kind of drip-proof shower nozzle for fused glass pellet 3D printer, comprise passage 4, heat block 1 and nozzle 14, passage 4 is arranged the feeding-passage of thermo-fuse, nozzle 14 is fixed on the lower end of passage 4, and the spout of nozzle 14 is communicated with the feeding-passage of passage 4; Passage 4 is set in heat block 1, and passage 4 is fixedly connected with heat block 1, passage 4 have expose to heat block 1 expose portion; Shower nozzle has Anti-drip-leakage mechanism, and Anti-drip-leakage mechanism comprises the baffle plate 12 can closing passage 4 discharging opening, and passage 4 bottom is provided with guide groove, and baffle plate 12 is arranged in guide groove, baffle plate 12 and guide groove matched in clearance; Baffle plate 12 is connected with stepper motor 8 by transmission mechanism, and the rotation of stepper motor 8 is converted into the translation of plate washer 12 along passage 4 radial direction by transmission mechanism, and transmission mechanism drives baffle plate 12 close or open the discharging opening of passage 4 steppingly.
As shown in Figure 1, shower nozzle grip block 2 is for being fixedly mounted on fused glass pellet 3D printer by whole shower nozzle; Passage 4 is fixedly mounted in the middle of shower nozzle grip block 2, and thermo-fuse passes from the feeding-passage of passage 4; It is peripheral that heat block 1 is arranged on passage 4 lower end, can, to the temperature of the thermo-fuse continuous heating in passage 4 to setting, make it from Solid State Transformation to molten condition, thus the material that can carry out next step be extruded and print job.Containing temperature sensor in heat block 1, the embedded PC in fused glass pellet 3D printer can read its numerical value in real time.Nozzle 14 is arranged on bottom passage 4, aligns with passage 4 axle, realizes the thermo-fuse of molten condition to extrude shower nozzle by the diameter of setting, completes the deposition process of printed material.
As shown in Figure 2, baffle plate 12 level is arranged in the guide groove of passage 4 bottom, can reciprocatingly slide left and right in guide groove, realizes the unlatching of passage 4 discharging opening with closed; After printing completes, baffle plate 12 is made to close passage 4 discharging opening, the weeping that the thermo-fuse that can keep from heat thawing occurs under gravity.
Transmission mechanism comprises the friction pulley 9 be connected with stepper motor 8, the slide block 10 contacted with friction pulley 9, the connecting rod 13 of the guide rail 11 that guide runner 10 moves and connection sliding block 10 and baffle plate 12; Force of sliding friction between friction pulley 9 and slide block 10 makes slide block 10 along guide rail 11 translation.The Movement transmit of slide block 10 to baffle plate 12, thus makes baffle plate 12 along the radial translation of passage 4 by connecting rod 13, reaches closed or opens the object of passage 4 discharging opening.
Stepper motor 8, friction pulley 9, slide block 10 and guide rail 11 are installed in baffle controls room 7; The base plate of baffle controls room 7 is provided with the through hole allowing connecting rod 13 to pass, and connecting rod 13 enough baffle plates of the distance of translation in through hole close or open the discharging opening of passage.That is, the width of through hole is greater than the stroke distances that connecting rod 13 drives baffle plate 12 to move, and through hole can not hinder connecting rod 13 to drive baffle plate 12 closed or open the discharging opening of passage.
As shown in Figure 1, baffle controls room 7 is fixedly installed in below shower nozzle grip block 2, is enclosed within heat block 1 peripheral; Inner space controls the associated component of plate washer 12 for installing; Stepper motor 8 is arranged in the bottom platform in baffle controls room 7, is connected with friction pulley 9; Guide rail 11 level is arranged on the bottom platform central authorities in baffle controls room 7; Slide block 10 is arranged on guide rail 11, and meanwhile, slide block 10 upper surface contacts with friction pulley 9 and is connected; Stepper motor 8 can drive friction pulley 9 to rotate forward or backwards, thus band movable slider 10, realize the bilateral reciprocation of slide block 10 on guide rail 11; Connecting rod 13 one end is fixedly connected with slide block 10, and the other end and baffle plate 12 are fixed, for realizing the bilateral reciprocation of plate washer 12; In the present embodiment, control by the embedded PC in fused glass pellet 3D printer in the motion of feeding motor 6 with stepper motor 8.
Passage 4 is provided with the feed mechanism of thermo-fuse, feed mechanism comprises initiatively feed wheel 5, driven feed wheel 3 and feeding motor 6, initiatively feed wheel 5 is connected with feeding motor 6, passage 4 is provided with initiatively feed wheel window and driven feed wheel window, initiatively feed wheel 5 and driven feed wheel 3 stretch in passage 4 through respective window, and initiatively feed wheel 5 and driven feed wheel 3 clamp thermo-fuse.Feeding motor 6 drives initiatively feed wheel 5 to rotate, and under the effect of force of sliding friction and force of rolling friction, initiatively feed wheel 5 and driven feed wheel 3 order about the top charging aperture downwards discharging opening motion of thermo-fuse from passage 4.
As shown in Figure 1, driven feed wheel 3 and active feed wheel 5 are arranged on the both sides of the feeding-passage of passage 4; Feeding motor 6 is arranged on the right side of shower nozzle grip block 2, is connected with active feed wheel 5; Under the driving of feeding motor 6, initiatively feed wheel 5 rotates by specific speed, realizes the lasting feeding of thermo-fuse in passage 4.
As shown in Figure 3, mainly the comprising the following steps of workflow of the present invention:
1) 3D printer is started, ready-to-print work.Importing 3 dimension module needing to print, after setting related printing parameters, opening heat block 1, heating passage 4, making its internal heat fuse to the temperature preset, and be molten condition by Solid State Transformation.
2) after having heated, start stepper motor 8, drive slide block 10 and connecting rod 13 to move right by friction pulley 9, baffle plate 12 is slided to the right, open feeding-passage in passage 4, then start normal print process.
3) in the process of 3D printing, feeding motor 6 drives initiatively feed wheel 5 to rotate, and realizes thermo-fuse and continues feeding by the speed of setting.
4), after having printed, feed-disabling motor 6, reverse starting stepper motor 8, drives slide block 10 and connecting rod 13 to left movement by friction pulley 9, baffle plate 12 is slided left simultaneously, the discharging opening of closed passage 4.
Content described in this description embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (6)
1. for a drip-proof shower nozzle for fused glass pellet 3D printer, comprise passage, heat block, nozzle and feed mechanism, passage is arranged the feeding-passage of thermo-fuse, nozzle is fixed on the lower end of passage, and the spout of nozzle is communicated with the feeding-passage of passage; Passage is set in heat block, and passage is fixedly connected with heat block; It is characterized in that: shower nozzle has Anti-drip-leakage mechanism, Anti-drip-leakage mechanism comprises the baffle plate can closing passage discharging opening, and passage bottom is provided with guide groove, and baffle plate is arranged in guide groove, baffle plate and guide groove matched in clearance; Baffle plate is connected with stepper motor by transmission mechanism, and the rotation of stepper motor is converted into the translation of plate washer along passage radial direction by transmission mechanism, and transmission mechanism drives baffle plate to close or open the discharging opening of passage steppingly.
2. as claimed in claim 1 for the drip-proof shower nozzle of fused glass pellet 3D printer, it is characterized in that: transmission mechanism comprises the friction pulley be connected with stepper motor, the slide block contacted with friction pulley, the guide rail of guide runner motion and the connecting rod of connection sliding block and baffle plate; Force of sliding friction between friction pulley and slide block makes slide block along guide rail translation.
3. as claimed in claim 2 for the drip-proof shower nozzle of fused glass pellet 3D printer, it is characterized in that: stepper motor, friction pulley, slide block and guide rails assembling are indoor in baffle controls; The base plate of baffle controls room is provided with the through hole allowing connecting rod to pass, and connecting rod enough baffle plates of the distance of translation in through hole close or open the discharging opening of passage.
4., as claimed in claim 3 for the drip-proof shower nozzle of fused glass pellet 3D printer, it is characterized in that: baffle controls room is installed on below shower nozzle grip block, and baffle controls room is enclosed within heat block periphery.
5. the drip-proof shower nozzle for fused glass pellet 3D printer as described in one of claim 1-4, it is characterized in that: passage is provided with the feed mechanism of thermo-fuse, feed mechanism comprises initiatively feed wheel, driven feed wheel and feeding motor, initiatively feed wheel is connected with feeding motor, passage is provided with initiatively feed wheel window and driven feed wheel window, initiatively feed wheel and driven feed wheel stretch in passage through respective window, initiatively feed wheel and driven feed wheel clamping thermo-fuse.
6., as claimed in claim 5 for the drip-proof shower nozzle of fused glass pellet 3D printer, it is characterized in that: passage is installed with shower nozzle grip block, the lower surface of shower nozzle grip block contacts with heat block; Initiatively feed wheel and driven feed wheel are installed on shower nozzle grip block, and shower nozzle grip block hollow forms the cavity holding driven feed wheel and active feed wheel, and feeding motor is fixed on shower nozzle grip block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939843.2A CN105459397B (en) | 2015-12-16 | 2015-12-16 | A kind of drip-proof shower nozzle for fused glass pellet 3D printer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510939843.2A CN105459397B (en) | 2015-12-16 | 2015-12-16 | A kind of drip-proof shower nozzle for fused glass pellet 3D printer |
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| CN105459397A true CN105459397A (en) | 2016-04-06 |
| CN105459397B CN105459397B (en) | 2018-01-30 |
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| CN201510939843.2A Expired - Fee Related CN105459397B (en) | 2015-12-16 | 2015-12-16 | A kind of drip-proof shower nozzle for fused glass pellet 3D printer |
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| CN106424734A (en) * | 2016-10-09 | 2017-02-22 | 湖南工业大学 | 3D spray-forming device |
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| CN106945264A (en) * | 2017-03-23 | 2017-07-14 | 湖北工业大学 | A kind of linear array injecting type FDM 3 D-printings shower nozzle and Method of printing |
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| CN107803984B (en) * | 2017-12-05 | 2023-11-10 | 共享智能装备有限公司 | Method for preventing nasal discharge in fused deposition modeling process |
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| CN112172147A (en) * | 2020-08-28 | 2021-01-05 | 中科院广州电子技术有限公司 | 3D printing head of continuous fiber reinforced material and using method |
| CN112720778A (en) * | 2020-12-25 | 2021-04-30 | 江苏集萃复合材料装备研究所有限公司 | Nozzle rotating double-nozzle type cement 3D printing structure and using method thereof |
| CN112917900A (en) * | 2021-01-21 | 2021-06-08 | 四川大学 | Air pressure formula fused deposition type 3D prints shower nozzle |
| CN115056491A (en) * | 2022-06-09 | 2022-09-16 | 西安增材制造国家研究院有限公司 | Electrical control system and method for nonmetal fused deposition material increase and decrease 3D printing equipment |
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| CN105459397B (en) | 2018-01-30 |
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