CN108356269A - A kind of 3D printer handpiece and 3D printer - Google Patents
A kind of 3D printer handpiece and 3D printer Download PDFInfo
- Publication number
- CN108356269A CN108356269A CN201810420252.8A CN201810420252A CN108356269A CN 108356269 A CN108356269 A CN 108356269A CN 201810420252 A CN201810420252 A CN 201810420252A CN 108356269 A CN108356269 A CN 108356269A
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- heating
- printer
- feeding
- discharge end
- printing head
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- 230000007246 mechanism Effects 0.000 claims abstract description 90
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 30
- 238000002844 melting Methods 0.000 claims abstract description 30
- 238000007639 printing Methods 0.000 claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 238000004093 laser heating Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000003325 tomography Methods 0.000 abstract description 6
- 230000035611 feeding Effects 0.000 description 69
- 239000010410 layer Substances 0.000 description 42
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 238000010146 3D printing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000002994 raw material Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 229910000619 316 stainless steel Inorganic materials 0.000 description 6
- 230000009471 action Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910052755 nonmetal Inorganic materials 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 229920005596 polymer binder Polymers 0.000 description 6
- 239000002491 polymer binding agent Substances 0.000 description 6
- 238000005238 degreasing Methods 0.000 description 5
- 210000001161 mammalian embryo Anatomy 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
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- 230000000750 progressive effect Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000012760 heat stabilizer Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
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- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/10—Auxiliary heating means
- B22F12/13—Auxiliary heating means to preheat the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
-
- 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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/10—Formation of a green body
- B22F10/18—Formation of a green body by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/368—Temperature or temperature gradient, e.g. temperature of the melt pool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
Abstract
The present invention provides a kind of 3D printer handpiece and 3D printers.The 3D printer handpiece of the present invention, including printing head main body and rack, printing head main body include feed end and discharge end, and feeding cavity is provided between feed end and discharge end, the both ends of feeding cavity are connected with feed end with discharge end respectively；Feeding cavity is internally provided with rotary shaft, and the top of rotary shaft is connected by link block with rack, and the bottom of rotary shaft is connected with material extrusion mechanism；The outer wall of feeding cavity has been arranged circumferentially heating melting mechanism, and the inner wall of printing head main body is provided with crushing mechanism, and the bottom end of crushing mechanism is connected with heating melting mechanism；The side of discharge end is provided with preheating mechanism, and preheating mechanism is connected with the bottom end of heating melting mechanism.The 3D printer of the present invention, is not limited to the form of feeding, effectively improves the engagement problems between printable layer and printable layer, and bad phenomenon is combined without cracking, tomography, warpage etc. between printable layer and printable layer.
Description
Technical field
The invention belongs to 3D printing technique field, it is related to a kind of 3D printer handpiece and 3D printer, more particularly to a kind of FDM
Type 3D printer handpiece and 3D printer.
Background technology
3D printing technique (3D printing), also known as three-dimensional printing technology are one kind based on digital model file,
With adhesive materials such as powdery metal, non-metal powder or plastics, the technology of object is constructed by layer-by-layer printing.
3D printing technique is applied on plastic material earliest.FDM (Fused Deposition Modeling) fusion stacking
Forming technique is current major way, it is by heat-fusible materials heating and melting, while three-dimensional nozzle is in the control of computer
Under, it according to section profile information, by material selectivity applies on the table, forms a layer cross section after being quickly cooled down.One layer
After the completion of molding, machine operation platform declines a height (i.e. lift height) and continues to be molded, until forming entire solid modelling.Its
Moulding material type is more, and molded part precision is higher, cheap, is primarily adapted for use in molding small plastic part.However, this mode is produced
Raw plastic product intensity is low, can not meet the requirement of client.In order to increase the intensity of product, improves the performance of product, incite somebody to action
Metal/non-metal is mixed with binder and is combined with the degreasing sintered technique of prior powder metallurgy through 3D printing forming, can be obtained
The metal/non-metal parts of high intensity.
CN206967985U discloses a kind of 3D printer handpiece and 3D printer, a kind of 3D printer handpiece, which is characterized in that
Including：Printing head main body；The printing head main body includes feed end and discharge end, and the feed end and the discharge end
Between be provided with for heating and storage print raw material melt chamber, and the both ends for melting chamber respectively with the feed end and
The discharge end connection；Described melt is provided with insulating assembly between chamber and the feed end.The invention is alleviated printer and is being printed
There is the problem of blocking printing head or fracture since raw material are heated unreasonable in the process.But raw material also limits to
Engagement situation in thread like material, and between printable layer and printable layer also remains to be further improved.
But still some bottlenecks are urgently to be resolved hurrily in actual operation at present：(1) feeding kenel performance；(2) printable layer and printing
The problem that falls off of interlayer.Currently used MIM feedings material, because wire strength deficiency easy fracture causes the discontinuous of production
Problem, therefore cannot be effectively used on 3D printer as PLA plastics, current settling mode has following points：(a) improve
Feeding characteristic：Using linear feeding on existing FDM boards, it need to consider the breakage problem of wire rod, therefore want the tension of reinforcement wire rod
Intensity.(b) change the feeding manner of printer：The bar of diameter 6mm × 150mm is sent feeding via unique feed mechanism
Enter heating chamber；Secondly, in printable layer and printable layer engagement problems, because the thermal coefficient of metal/non-metal is far above plastic material,
Therefore when using metal/non-metal with binder mixed feed, since easy heat radiation causes lower layer of material to be easy solidification, cause up and down
Layer engagement is bad, is broken or is detached from so that the product defects of 3D printing processing procedure are higher.Current improvement mode is in printing machine cavity
It is interior to make to improve by adjusting cavity temperature, but effect is limited, and electronic building brick influences the base of electric appliance easily because high temperature damages
This function.
Therefore, how to improve the engagement problems between printable layer and printable layer be people in the industry anxious effort direction.
Invention content
In view of the deficiencies of the prior art, one of the objects of the present invention is to provide a kind of 3D printer handpiece, it is not limited to feeding
Form, effectively improve the engagement problems between printable layer and printable layer, between printable layer and printable layer without cracking, tomography,
Warpage etc. combines bad phenomenon.
For this purpose, the present invention uses following technical scheme：
A kind of 3D printer handpiece, including printing head main body and rack, the printing head main body include feed end and go out
Expect end, be provided with feeding cavity between the feed end and the discharge end, the both ends of the feeding cavity respectively with it is described
Feed end is connected with the discharge end；
The feeding cavity is internally provided with rotary shaft, and the top of the rotary shaft passes through link block and the rack phase
Connection, the bottom of the rotary shaft is connected with material extrusion mechanism；
The outer wall of the feeding cavity has been arranged circumferentially heating melting mechanism, and the inner wall of the printing head main body is provided with
Crushing mechanism, the bottom end of the crushing mechanism are connected with heating melting mechanism；
The side of the discharge end is provided with preheating mechanism, the bottom end phase of the preheating mechanism and heating melting mechanism
Connection.
The crushing mechanism includes stator and the rotor with helicla flute, and the stator is fixedly arranged on the printing head main body
Inner wall, the rotor with helicla flute is set to the top of the rotary shaft and setting corresponding with the stator.It is described
Stator and the rotor with helicla flute make it have various sizes of gap, in a progressive way will not at a fit angle
Feeding with kenel is broken into different dimensional states.
The preheating mechanism is 3~50mm at a distance from the discharge port of the discharge end, and the preheating mechanism can be 1
It is a, 2,3 or more, i.e., preheating mechanism it is circumferentially distributed radius be 3~50mm circumference on, preferred radius distance be 5
~30mm.
50~170 DEG C of the heating temperature of the preheating mechanism, preferred temperature are 60~120 DEG C.
The mode of heating of the preheating mechanism is heating plate heating, high frequency heating or laser heating.
It is that temperature is gradual from top to bottom that the heating temperature of heating melting mechanism, which has temperature gradient, the temperature gradient,
It increases.
The mode of heating of heating melting mechanism is that coil heats or high frequency heat.
The material extrusion mechanism is the inverted cone with helicitic texture.The helicitic texture of the material extrusion mechanism has forced guiding
Function, after screw thread rotation acts, charging end area is more than discharge end, and the feeding of same volume is entered after melting by big cross section small
Pressure difference caused by cross sectional area so that feeding is extruded effect.Therefore therefore compulsory screw action power is by a large amount of molten states
Feeding, the nozzle of discharge end is extruded onto by mechanical force squeezing action, is sequentially coated on product platform according to programming path.
The feeding mechanism is feed pipe or vibration screen.
The second object of the present invention is to provide a kind of 3D printer, including 3D printer handpiece as described above.
Compared with prior art, beneficial effects of the present invention are：
(1) simplify the pre-treating technology of raw material：The kenel type of the 3D printer printed material of FDM types is no longer limited, no
Tube wire, particle, sheet material or powdery will all be converted to fine-powdered into molten condition into 3D printing head, simplify raw material
Pre-treating technology.
(2) feeding characteristic is without particular/special requirement：There is temperature gradient can be chronically at height to avoid feeding for heating melting mechanism
The cracking problem of high molecular material under warm environment, while may not necessarily consider the feeding mobility emphasized in metal injection molded forming
(MFI), not caused enough the breakage problem of toughness when also need not deliberately consider using thread like material.
(3) improve the engagement of layer and interlayer：Preheating mechanism can be when tiling one layer of feeding, because last layer still possesses one
Fixed temperature, therefore can effectively engage levels closer.
Description of the drawings
Fig. 1 is the structural schematic diagram of the 3D printer handpiece of the present invention；
Fig. 2 is the schematic diagram for the 316 stainless steel metal products that the embodiment of the present invention obtains；
Fig. 3 is the schematic diagram for the 316 stainless steel metal products that the comparative example of the present invention obtains；
Reference numeral is as follows：
1- printing head main bodys；11- feed ends；12- discharge ends；2- feeding cavitys；3- crushing mechanisms；31- stators；32-
Rotor with helicla flute；4- heating meltings mechanism；5- preheating mechanisms；6- printable layers；7- material extrusions mechanism；8- rotary shafts；9- connects
Connect block.
Specific implementation mode
1-3 below in conjunction with the accompanying drawings, and the technical solution further illustrated the present invention by specific implementation mode.
As shown in Figure 1, a kind of 3D printer handpiece of the present invention, including printing head main body and rack, printing head main body 1 are wrapped
Feed end 11 and discharge end 12 are included, feeding cavity 2, the both ends of feeding cavity 2 are provided between feed end 11 and discharge end 12
It is connected respectively with feed end 11 with discharge end 12；Feeding cavity 2 is internally provided with rotary shaft 8, and the top of rotary shaft 8 passes through
Link block 9 is connected with rack, and the bottom of rotary shaft 8 is connected with material extrusion mechanism 7；The outer wall of feeding cavity 2, which has been arranged circumferentially, to be added
The inner wall of heat fusing mechanism 4, printing head main body 1 is provided with crushing mechanism 3, bottom end and the heating melting mechanism 4 of crushing mechanism 3
It is connected；The side of discharge end 12 is provided with preheating mechanism 5, and preheating mechanism 5 is connected with the bottom end of heating melting mechanism 4.
When printing head works, rotary shaft 8 rotates, and feeding is added in feed end 11, fine-powdered is broken into through crushing mechanism 3
Afterwards, therefore feeding is not controlled by form, and the feeding of broken rear fine-powdered enters feeding cavity 2, and heated melting mechanism 4 heats
Afterwards, feeding becomes molten condition, and the feeding after melting enters discharge end 12, is squeezed after the guiding of material extrusion mechanism 7 squeezes to going out
The nozzle for expecting end is sequentially coated on formation printable layer 6 on product platform according to programming path, opens preheating mechanism 5 and fight each other
The last layer printable layer printed off is preheated, and the printing of the second layer is carried out into subsequent cycle so that between adjacent two printable layer
The temperature difference will not be too big, the product thus printed is tightly combined between layers, the bad problem such as no cracking, tomography, warpage.
Feeding mechanism can be feed pipe or vibration screen, and the feeding of various kenels is sent into feed end.Wherein, feeding
Can be the metal/non-metal powder of high polymer binder package, the shape of feeding can be in granular form, linear, sheet or length
Strip.
Be provided with feeding cavity 2 between feed end 11 and discharge end 12, the both ends of feeding cavity 2 respectively with feed end 11
It is connected with discharge end 12.
Crushing mechanism 3 includes that stator 31 and the rotor 32 with helicla flute, stator 31 are fixedly arranged on the interior of printing head main body 1
Wall, the rotor 32 with helicla flute are set to the top of rotary shaft 8 and setting corresponding with stator 31.Stator 31 and have spiral
The rotor 32 of slot makes it have various sizes of gap at a fit angle, is in a progressive way crushed the feeding of different kenels
At different dimensional states.Crushing mechanism 3 is broken into fine-powdered by the feeding of different shape is progressive, is then introduced into feeding cavity 2.
The outside of feeding cavity 2 is provided with heating melting mechanism 4, and the mode of heating of heating melting mechanism 4 is coil heats
Or high frequency heating；Meanwhile melting mechanism 4 is heated with temperature gradient, so that feeding is had different molten conditions in different location,
Service life in favor of feeding and discharging control.
Preheating mechanism 5 is set to the front end of discharge end 12, and the printable layer 6 of the last layer for heating out makes adjacent two layers
The temperature difference of printable layer be unlikely to layer is caused very much to bind directly with layer greatly it is bad, preheating mechanism 5 at a distance from discharge end 12 for 3~
50mm, preheating mechanism can be 1,2,3 or more, i.e. preheating mechanism is circumferentially distributed in the circumference that radius is 3~50mm
On, preferred radius distance be 5~30mm, such as can be 3mm, 4mm, 5mm, 8mm, 10mm, 12mm, 15mm, 18mm,
20mm、22mm、25mm、28mm、30mm、35mm、40mm、45mm、50mm.50~170 DEG C of the temperature of preheating mechanism 5, preferably
Temperature is 60~120 DEG C, for example, the temperature 50 C of preheating mechanism 5,70 DEG C, 90 DEG C, 110 DEG C, 120 DEG C, 140 DEG C, 150 DEG C, 170
℃.Make bottom there are enough viscous forces not moved by the flowing of upper layer feeding, causes product filling bad, first by lead position
Feeding region make preheating action, keep the temperature difference between new, old layer feeding as possible, it is ensured that between layers close connects
It closes, avoids because heat dissipation leads to problems such as very much layer engage cracking, tomography, warpage etc. with interlayer in conjunction with bad soon.Preheating machine
The mode of heating of structure 5 is heating plate heating, high frequency heating or laser heating.When the mode of heating of preheating mechanism 5 adds for laser
When hot, the focal dimension that can control laser is 0.1~0.5mm, when focal dimension is less than 0.1mm, the too high meeting of local heating
The performance for destroying product, when focal dimension is more than 0.5mm, dynamics of being heated is inadequate, is not had effectively to the gas producing formation printed
Pre- heat effect.
Material extrusion mechanism 7 is the inverted cone with helicitic texture.The helicitic texture of material extrusion mechanism 7 has forced guiding function,
After screw thread rotation start, charging end area is more than discharge end, and the feeding of same volume enters light section after melting by big cross section
Pressure difference caused by region so that feeding is extruded effect.Therefore therefore compulsory screw action power by a large amount of molten states feed
Material, the nozzle of discharge end is extruded onto by mechanical force squeezing action, is sequentially coated on product platform according to programming path.
The 3D printer of the present invention, including 3D printer handpiece as described above.The present invention 3D printer can by metal/
Non-metallic powder and high polymer binder are kneaded the feeding for being prepared into each kenel, and obtained feeding is printed as using 3D printer
Type obtains green compact, and gained raw embryo is passed through degreasing, sintering and post-processing successively, obtains finished parts.
For the present invention is better described, it is easy to understand technical scheme of the present invention, of the invention is typical but non-limiting
Embodiment is as follows：
Embodiment
A kind of preparation method of 3D printing feeding of the present embodiment is as follows：
(1) 60vol% stainless steel metals are mixed with the high polymer binder of 40vol%, the high polymer binder packet
It includes：Polyformaldehyde 86wt%, polypropylene 8wt%, stearic acid 1wt%, heat stabilizer 0.5wt%, plasticizer 2wt%, interfacial activity
Agent 1wt%, lubricant 1.5wt%；The raw material is added in mixer, 1h is kneaded at 170 DEG C；
(2) what obtained material was extruded as a diameter of 3mm after utilizing comminutor to be kneaded step (1) is in granular form material,
The 3D printing feeding is obtained after cooling, it is spare that the particle is processed into wire rod shape feeding.
(3) feeding that step (2) obtains is positioned over to the feed end 11 of FDM type 3D printers.
(4) feeding of step (3) feed end 11 is entered in crushing mechanism 3, graininess feeding is crushed or is crushed, with
The guiding role of 3 screw thread of crushing mechanism moves to heating melting mechanism 4, and heated melting becomes solidifying state or molten state.
(5) step (4) is squeezed after the solidifying state feeding of heating melting mechanism 4 is also squeezed via material extrusion mechanism 7 and is extremely printed
12 temperature of feeding discharge end is set as 210 DEG C, while enabling preheating mechanism 5 by the discharge end 12 of machine, and setting preheating zone temperature is
It 190 DEG C, is sequentially coated on workbench and completes the making of product raw embryo.Gas is drained into upper end storage space feeding cavity simultaneously
Cavity is discharged after 2.
(6) the raw embryo product of step (5) can have been obtained by 110 DEG C of catalysis degreasings, 1360 DEG C of vacuum sintering technologies
Complete 316 stainless steel metal product.Obtained 316 stainless steel metal products as shown in fig. 2, it can be seen that the present invention printer
The product printed is tightly combined between layers, the bad problem such as no cracking, tomography, warpage.
Comparative example
With embodiment the difference is that not enabled preheating mechanism in comparative example, a kind of 3D printing feeding of this comparative example
Preparation method is as follows：
(1) 60vol% stainless steel metals are mixed with the high polymer binder of 40vol%, the high polymer binder packet
It includes：Polyformaldehyde 86wt%, polypropylene 8wt%, stearic acid 1wt%, heat stabilizer 0.5wt%, plasticizer 2wt%, interfacial activity
Agent 1wt%, lubricant 1.5wt%；The raw material is added in mixer, 1h is kneaded at 170 DEG C；
(2) what obtained material was extruded as a diameter of 3mm after utilizing comminutor to be kneaded step (1) is in granular form material,
The 3D printing feeding is obtained after cooling, it is spare that the particle is processed into wire rod shape feeding.
(3) feeding that step (2) obtains is positioned over to the feed end 11 of FDM type 3D printers.
(4) feeding of step (3) feed zone is entered in a crushing mechanism 3, graininess feeding is crushed or is crushed, with
The guiding role of 3 screw thread of crushing mechanism moves to heating melting mechanism 4, becomes solidifying state or molten state.
(5) step (4) is squeezed after the solidifying state feeding of heating melting mechanism 4 is also squeezed via material extrusion mechanism 7 and is extremely printed
Feeding is sequentially coated in via 210 DEG C of discharge ports on workbench and completes the making of product raw embryo, simultaneously will by the discharge end 12 of machine
Cavity is discharged after draining into upper end storage space feeding cavity 2 in gas.
(6) the raw embryo product of step (5) can have been obtained by 110 DEG C of catalysis degreasings, 1360 DEG C of vacuum sintering technologies
Complete 316 stainless steel metal product.Obtained 316 stainless steel metal products as shown in figure 3, be easy to happen in print procedure layer with
Interlayer engagement problems cause the bad problems such as follow-up degreasing sintered product cracking, warpage.
The 3D printer of the present invention, is not limited to the form of feeding, effectively improves the engagement between printable layer and printable layer
Problem combines bad phenomenon between printable layer and printable layer without cracking, tomography, warpage etc..
Above example only is used for illustrating the method detailed of the present invention, and the invention is not limited in above-mentioned method detaileds, i.e.,
Do not mean that the present invention has to rely on above-mentioned method detailed and could implement.Person of ordinary skill in the field is it will be clearly understood that right
Any improvement of the present invention, the addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, the selection of concrete mode
Deng all falling within protection scope of the present invention and the open scope.
Claims (10)
1. a kind of 3D printer handpiece, including printing head main body (1) and rack, which is characterized in that the printing head main body (1)
Including feed end (11) and discharge end (12), feeding cavity is provided between the feed end (11) and the discharge end (12)
(2), the both ends of the feeding cavity (2) are connected with the feed end (11) with the discharge end (12) respectively；
The feeding cavity (2) is internally provided with rotary shaft (8), and the top of the rotary shaft (8) passes through link block (9) and institute
It states rack to be connected, the bottom of the rotary shaft (8) is connected with material extrusion mechanism (7)；
The outer wall of the feeding cavity (2) has been arranged circumferentially heating melting mechanism (4), the inner wall of the printing head main body (1)
It is provided with crushing mechanism (3), the bottom end of the crushing mechanism (3) is connected with heating melting mechanism (4)；
The side of the discharge end (12) is provided with preheating mechanism (5), and the preheating mechanism (5) melts mechanism with the heating
(4) bottom end is connected.
2. 3D printer handpiece according to claim 1, which is characterized in that the crushing mechanism (3) include stator (31) and
Rotor (32) with helicla flute, the stator (31) is fixedly arranged on the inner wall of the printing head main body (1), described to have spiral
The rotor (32) of slot is set to the top of the rotary shaft (8) and setting corresponding with the stator (31).
3. 3D printer handpiece according to claim 1 or 2, which is characterized in that the preheating mechanism (5) and the discharge end
(12) distance of discharge port is 3~50mm, preferably 5~30mm.
4. 3D printer handpiece according to claim 1 or 2, which is characterized in that the heating temperature of the preheating mechanism (5) is
50~170 DEG C, preferably 60~120 DEG C.
5. 3D printer handpiece according to claim 1 or 2, which is characterized in that the mode of heating of the preheating mechanism (5) is
Heating plate heating, high frequency heating or laser heating.
6. 3D printer handpiece according to claim 1, which is characterized in that the heating temperature of the heating melting mechanism (4)
With temperature gradient, the temperature gradient is that temperature gradually rises from top to bottom.
7. 3D printer handpiece according to claim 1, which is characterized in that the mode of heating of the heating melting mechanism (4)
It is heated for coil heats or high frequency.
8. 3D printer handpiece according to claim 1, which is characterized in that the material extrusion mechanism (7) is with helicitic texture
Inverted cone.
9. 3D printer handpiece according to claim 1, which is characterized in that the feed inlet of the feed end (11) be connected with into
Expect that mechanism, the feeding mechanism are feed pipe or vibration screen.
10. a kind of 3D printer, which is characterized in that including such as claim 1-9 any one of them 3D printer handpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420252.8A CN108356269B (en) | 2018-05-04 | 2018-05-04 | 3D printer head and 3D printer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420252.8A CN108356269B (en) | 2018-05-04 | 2018-05-04 | 3D printer head and 3D printer |
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| Publication Number | Publication Date |
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| CN108356269A true CN108356269A (en) | 2018-08-03 |
| CN108356269B CN108356269B (en) | 2024-03-22 |
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ID=63011642
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810420252.8A Active CN108356269B (en) | 2018-05-04 | 2018-05-04 | 3D printer head and 3D printer |
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| Country | Link |
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|---|---|
| CN108356269B (en) | 2024-03-22 |
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