CN110524868A - A kind of 3D printer fluent material print head - Google Patents
A kind of 3D printer fluent material print head Download PDFInfo
- Publication number
- CN110524868A CN110524868A CN201910689778.0A CN201910689778A CN110524868A CN 110524868 A CN110524868 A CN 110524868A CN 201910689778 A CN201910689778 A CN 201910689778A CN 110524868 A CN110524868 A CN 110524868A
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- Prior art keywords
- needle
- head
- valve
- connecting bracket
- print head
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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
- B29C64/10—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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- 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
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
-
- 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
- B29C64/30—Auxiliary operations or equipment
-
- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses a kind of 3D printer fluent material print heads, are mainly made of sequentially connected cylinder part from top to bottom, connection component and barrel portion；Barrel portion mainly includes guide sleeve, barrel valve, printing head and casing jam nut；It is equipped with one in the gas chamber of cylinder block and seals the piston body being slidably matched with air chamber wall；Connection component mainly includes connecting bracket and needle fixture；Piston body is fixedly connected with the upper end of valve rod；Valve rod lower end stretches out cylinder body is connect after passing through sealing sleeve pipe with needle fixture upper end into sealing sleeve pipe；Needle passes through discharge port, material chamber, top pin hole and spring from bottom to top, connect with needle fixture lower end；Valve head is sealed in cone-shaped, discharge port is closed when needle moves up, discharge port is opened when moving down.The configuration of the present invention is simple is reliable, easy to maintain, has the function of fracture resorption and printing head automatic telescopic function, especially suitable for the more material 3D printings of more spray heads comprising fluent material.
Description
Technical field
The present invention relates to a kind of 3D printers, and in particular to a kind of 3D printer fluent material print head belongs to 3D and beats
Print technical field.
Background technique
3D printing is one kind based on digital model file, by solid powder, fluent material or polymer melt material
Construct the rapid shaping technique of object by layer-by-layer printing.Current existing 3D printing technique is numerous, including squeezes out
Form (fusion sediment formula FDM and liquid write-through LDW), Stereolithography (laser scan type SLA, projection cured type DLP or
Polymeric spray formula PolyJet) and powdering molding (laser sintered formula SLS/SLM or the bonded 3DP of ink-jet) etc., wherein extruded type
3D printing is earliest, the most widely used one kind of development.
In traditional extruded type 3D printing technique, mostly designed with single nozzle based on, and technology is more mature.With more face
The development of color and more material 3D printing techniques, more and more 3D printing equipment start using double spray heads or more sprinkler designs.So
And either single nozzle, double spray heads or more sprinkler designs, the nozzle position and nozzle height of existing extruded type 3D printer
It is most of be it is fixed, this traditional design can bring some problems: single nozzle is when non-print section fast moves, nozzle
Printer model is often scratched, unless taking the passive mode for changing Z axis coordinate to avoid risk；The feelings of double spray heads or more spray heads
Under condition, because the height of each spray head is identical, at work, another spray head often scratches model to a spray head, influences impression block
Type appearance.Although having had taken up a variety of methods in the prior art to solve the above problems, there are still many drawbacks.
Chinese invention patent application CN106626388A discloses a kind of double ejecting devices of 3D printer, Chinese invention patent
Application CN108790145A discloses a kind of scalable double spray head FDM-3D printer head components of electromagnetism manipulation, and the two is main
It is that stretching for double spray heads is controlled by the on-off of electromagnet.Chinese utility model patent CN206781005U discloses one kind certainly
The dynamic 3D printer for adjusting height discloses a kind of double nozzle components of 3D printer with double spray heads, CN206926264U,
CN207549494U discloses a kind of double spray heads of adjustable 3D printing, and CN207682959U discloses a kind of for 3D printer
Double spray head switching devices, four reciprocating rotaries for mainly passing through motor drive moving up and down for double spray heads.Chinese utility model is special
Sharp CN207105636U discloses a kind of double spray heads of FFF printer pneumatic type, mainly by FFF printer (i.e. FDM)
Double spray heads on pneumatic unit outside plus realize the flexible of double spray heads.The above-mentioned prior art is all made of the electricity outside plus
Magnetic cell, electric motor units or pneumatic unit realize the automatic telescopics of double spray heads, cause printing head modular construction complicated, body
Long-pending and weight is larger, influences fast moving for print head, and generate unnecessary energy consumption；Meanwhile it being not directed in above-mentioned patent
The 3D printing of fluent material and its extension and contraction control of print head.
Chinese invention patent application CN107053662A discloses a kind of photocuring silica gel 3D printing device and its printing side
Method, CN109016070A disclose a kind of double spray head extruded type ceramics 3D printers and its Method of printing, and CN109203174A is public
A kind of double ejecting devices of extruded type 3D printing are opened, three realizes photocuring silica gel material, ceramic slurry and concrete respectively
Double nozzle printings of slurry.Chinese invention patent CN108391844A discloses a kind of multi-functional 3D printer, and China is practical new
Type patent CN208164300U discloses a kind of double spray head 3D printers of soft or hard material convolution, and the two realizes solid filament respectively
Double nozzle printings of material and fluent material；Chinese utility model patent CN208020765U discloses one kind and beats for biology 3D
The material supplying systems of print are switched the working condition of the double spray heads of different biomaterials using electromagnetic pneumatic reversal valve, avoided
Screw Extrusion mode carrys out the damage caused by biomaterial.The above-mentioned prior art has all referred to the 3D printing and double sprays of fluent material
Head design, but its sprinkler height is unable to adjust automatically, and certainly will will affect print quality, restricts extruded type fluent material 3D printing skill
The promotion and popularization of art.
Therefore, 3D printer field is badly in need of providing that a kind of structure is simple, 3D printing of automatically retractable is beaten with fluent material
Head is printed, so as to solve the deficiencies in the prior art.
Summary of the invention
In order to solve the problems existing in the prior art, the object of the present invention is to provide a kind of 3D printers is printed with fluent material
Head, by the automatic telescopic and fracture resorption of printing head, the spray head that effectively prevents not working in print procedure is to printer model
Scratch and interfere, improve the print quality of 3D printer, can be not only used for single nozzle 3D printing, but be suitable for multiple color,
More spray head 3D printings that plurality of liquid material and solid-liquid material combine, have a wide range of application.
To achieve the above object, the present invention provides following technical schemes:
A kind of 3D printer fluent material print head, mainly by sequentially connected cylinder part, connection component from top to bottom
It is formed with barrel portion；The cylinder part includes cylinder block, piston body and valve rod；One and gas chamber are equipped in the gas chamber of cylinder block
Wall seals the piston body being slidably matched；Piston body is fixedly connected with the upper end of valve rod, the gas chamber sidewall above and below piston body
It is respectively equipped with the first air inlet and the second air inlet；First air inlet and the second air inlet are connected to gas source respectively；
The connection component mainly includes connecting bracket and needle fixture；Needle fixture, needle are equipped in connecting bracket
Fixture upper end and connecting bracket upper end lower surface form spacing, between needle clamp base and connecting bracket upper base surface are formed
Away from；The bottom of cylinder block is equipped with a sealing sleeve pipe being slidably matched with valve stem seal；The bottom of sealing sleeve pipe upper end and cylinder block
Portion's connection, lower end is protruded into connecting bracket, is connect with connecting bracket；Valve rod lower end stretches out cylinder body is passed through into sealing sleeve pipe
It is connect after sealing sleeve pipe with needle fixture upper end；
The barrel portion mainly includes guide sleeve, barrel valve, printing head and casing jam nut；The guiding
Casing is fixedly connected with connecting bracket；Guide sleeve is ladder hollow cylinder structure, and it is hollow straight that upper end inflated diameter is less than lower end
Diameter forms the first limit at ladder；Barrel valve is periphery stepped cylindrical structure, and upper end cylindrical periphery diameter is small, outside the cylinder of lower end
All diameters are big, and the second limit is formed at the ladder of periphery；Barrel valve is arranged in guide sleeve, the outer wall and guide sleeve of barrel valve
Inner wall be closely slidably matched；The inner cavity top of guide sleeve is equipped with spring, and the lower end of guide sleeve is equipped with the long and narrow of axial direction and opens
Mouth and circumference external screw thread；Barrel valve lower end be equipped with material chamber, expect chamber lower end be discharge port, material chamber laterally with stretch out barrel
The feed inlet of valve lower end exterior circular column is connected to；Feed inlet is horizontally set in slotted opening；The material chamber upper end of barrel valve is equipped with
One seals the top pin hole being slidably matched with needle；Needle lower end be equipped with sealing valve head, needle pass through from bottom to top discharge port,
Expect chamber, top pin hole and spring, is fixedly connected with needle fixture lower end；Sealing valve head is located in discharge port；Seal valve head
Diameter is equal to the intracavity diameter of discharge port, greater than the intracavity diameter of material chamber lower end；
The printing head includes that spray head feed inlet, spray head material chamber and printing spout, spray head feed inlet are located at spray head
Expect the upper end of chamber, it is mutually nested with the discharge port of barrel valve, it is in tight interference fit, printing spout upper end and spray head material chamber
It communicates；Casing jam nut is cavity structure, and cavity top is cylindrical, is equipped with internal screw thread, the outer spiral shell with guide sleeve lower end
Line connection, cavity lower part are equipped with opening in cone, bottom；Printing head is located in the cavity of casing jam nut, printing spray
The bottom opening of casing jam nut is stretched out in mouth lower end.
To further realize the object of the invention, it is preferable that the needle fixture upper end is equipped with threaded hole, and lower end is equipped with and opens
Hole；The mode that valve rod is connect with needle fixture upper end is to be threadedly coupled；The mode that needle is connect with needle fixture lower end is needle
It protrudes into the aperture of needle fixture lower end, needle upper end is fixed in the lower end aperture of needle fixture by lateral lock-screw, side
It is arranged on the side wall of needle fixture lower end to lock-screw.
Preferably, the connecting bracket is the frame-type structure of opening, including the upper and lower end face that is parallel to each other and with it is upper and lower
The middle fixing plate of end face connection；Needle fixture is equipped in the frame-type structure of opening；Middle fixing plate is equipped with multiple circular holes, leads to
Circular hole and screw is crossed to be fixedly connected with the X-axis slide block of 3D printer.
Preferably, the connecting bracket upper surface is equipped with installation circular hole, and sealing sleeve pipe lower end passes through installation circular hole, is located at and connects
The sealing sleeve pipe periphery for connecing pedestal upper end face lower part is equipped with the first locking nut, and sealing sleeve pipe and connecting bracket upper surface pass through the
One locking nut is fixed.
Preferably, the stem outer circumference above the needle fixture is equipped with the second locking nut, and valve rod lower end and needle press from both sides
Tool upper end is fixed by the second locking nut；C-type or O are cased on valve rod between the first locking nut and the second locking nut
Type shock ring.
Preferably, the lower end surface of the needle fixture is pasted with vibration damping sheet, and vibration damping sheet is circular plastic thin slice, and center is set
There is circular hole.
Preferably, the mode that the guide sleeve is fixedly connected with connecting bracket is that connecting bracket lower end surface is equipped with connection
Circular hole, the top of guide sleeve are located at connected circular hole, and connecting bracket lower end surface side is equipped with threaded hole, is equipped in threaded hole lateral
Positioning screw is fixed connecting bracket lower end with guide sleeve by lateral register screw.
Preferably, the printing spout is elongated tubular flat mouth structure.
Preferably, first air inlet and the second air inlet pass through quick-release connector and solenoid valve respectively and gas source connects
It connects.
Preferably, the 3D printer fluent material print head is more than two combinations, more than two 3D printings
Machine is mounted side by side according to identical height in the X-axis slide block of 3D printer with fluent material print head.
When needle fixture of the present invention drives needle, barrel valve and printing head to move upwardly into the stop position on top, vibration damping sheet
Spacing with guide sleeve top is the stroke H0 of needle, between the feed inlet bottom and casing jam nut top of barrel valve
Stroke H1 away from as printing head；The adjustable H1 of revoling tube jam nut；When H1 meets 0 < H1 of condition < H0, barrel
Valve and printing head can move down H1 to working position under the effect of top spring with the downlink of needle, then seal valve head and open
Discharge port, printing head enter working condition；When the needle uplink, sealing valve head closes discharge port, and printing head fracture returns
It inhales and moves up H1 together with barrel valve to stop position, printing head stops working.
The fluent material that the present invention applies is required according to printing, and various composition, state, viscosity, reactivity and use may be selected
The liquid material on way, including but not limited to reactive polymer prepolymer (liquid silastic/polyurethane/epoxy resin/polypropylene
Acid esters/unsaturated polyester (UP)/photosensitive prepolymer etc.), liquid macroimolecule material (polymer solution/lotion/suspension), liquid biological
(agar/glucose/gelatin/chitosan/ossein/sodium alginate/hydroxyapatite/soybean protein/biological cell etc. is raw for material
Solution, emulsion or the dispersion of object material), the food liquid material (food materials such as flour/chocolate/vegetables/meat/eggs
Solution, emulsion or dispersion) and liquid-state building material (solution, emulsion or the dispersion of the construction materials such as cement/ceramics/gypsum
Body).
Printing head of the present invention is required according to the fluent material characteristic and printing, and various materials, bore and rule may be selected
The printing head of lattice, including but not limited to plastic-steel/all steel/plastic spray head, cylindricality/Conic nozzle, rigid/flex spray head, bayonet/
Screw socket/flat mouth spray head, opaque/transparent spray head, single tube/multitube spray head (pipe number: 1-10), long tube/short tube spray head (length model
Enclose: 1-100mm), thin nozzle/thick nozzle spray head (internal diameter: 0.05-50mm), circle nozzle/flat nozzle spray head.
Compared with the existing technology, the present invention has the advantage that
1. the cylinder part upper end that the present invention uses manually controls flow without additional addition stroke adjusting device, it is only necessary to logical
It crosses the shock ring of replacement different height or adjusts the stroke that the height at the top of guide sleeve suitably to adjust needle fixture and needle,
The flow and print speed of liquid material are automatically adjusted by external feeding control system, structure is simply small and exquisite, safely may be used
It leans on.
2. the barrel valve and printing head in the barrel portion that the present invention uses can be upper with needle when working start and stop
Lower movement realizes automatic telescopic and material on-off simultaneously, simple and compact for structure without adding additional power device, efficiently saves
Can, further mitigate the volume and weight of fluent material print head.
3. the present invention can be conveniently adjusted the telescopic height of printing head by can be manually rotated casing jam nut, assign
The good scalability of fluent material print head and fracture resorption function are given, effectively avoids printing head quick in nonprinting region
To the destruction of model appearance and the interference when bull prints between each spray head when mobile, print quality is improved.
Detailed description of the invention
Fig. 1 is the main view of 3D printer fluent material print head of the present invention；
Fig. 2 is the left view of 3D printer fluent material print head of the present invention；
Fig. 3 is the structural schematic diagram of barrel valve in Fig. 1；
Fig. 4 is the structural schematic diagram of single head component when printing head is in stop position and discharge port is closed；
Fig. 5 is the structural schematic diagram of single head component when printing head is in working position and discharge port is closed；
Fig. 6 is the structural schematic diagram of single head component when printing head is in working position and discharge port is opened；
Fig. 7 is biliquid double end print components made of being combined by two 3D printers of the present invention with fluent material print head
Working principle diagram；
Fig. 8 is solid print head is worked and the knot of solid-liquid double end print components when liquid print head is in stop position
Structure schematic diagram；
Fig. 9 is liquid print head is worked and the knot of solid-liquid double end print components when solid print head is in stop position
Structure schematic diagram.
Specific embodiment
The present invention will be further described below with reference to the drawings.It should be understood that specific implementation described herein
Mode is used only for explaining the present invention rather than limiting the invention.
This specification structure shown in the drawings, ratio, size etc., only to cooperate the revealed content of specification, with
For skilled in the art realises that with reading, being not intended to limit the invention enforceable qualifications, the modification of any structure,
The change of proportionate relationship or the adjustment of size, in the case where not influencing the effect of present invention can be generated and the purpose that can reach,
It should fall in the range of disclosed technology contents cover.The use of cited such as "upper", "lower" in specification
Language is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or tune
It is whole, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, a kind of 3D printer fluent material print head, mainly by sequentially connected from top to bottom
Cylinder part 1, connection component 2 and barrel portion 3 form.
Cylinder part 1 includes cylinder block, piston body 11, valve rod 12, the first air inlet 13 and the second air inlet 14；Cylinder block is
It is cylindrical；It is equipped with one in the gas chamber of cylinder block and seals the piston body 11 being slidably matched with air chamber wall；Piston body 11 and valve rod 12
Upper end be fixedly connected, the gas chamber sidewall above and below piston body 11 is respectively equipped with the first air inlet 13 and the second air inlet
14；
Connection component 2 mainly includes connecting bracket 20 and needle fixture 24；Needle fixture 24, valve are equipped in connecting bracket 20
24 upper end of needle fixture and 20 upper end lower surface of connecting bracket form spacing, table on 24 bottom of needle fixture and 20 bottom of connecting bracket
Face forms spacing；The bottom of cylinder block is equipped with one and seals the sealing sleeve pipe being slidably matched with valve rod 12；Sealing sleeve pipe upper end with
The bottom of cylinder block connects, and lower end is protruded into connecting bracket 20, connect with connecting bracket 20.
Preferably, connecting bracket 20 is the frame-type structure of opening, including the upper and lower end face and and upper and lower end face being parallel to each other
The middle fixing plate of connection；Needle fixture 24 is equipped in the frame-type structure of opening；24 upper end of needle fixture is equipped with threaded hole, is used for
It is threadedly coupled with valve rod 12, lower end is equipped with aperture；12 lower end of valve rod passes through 20 upper surface of sealing sleeve pipe and connecting bracket, protrudes into valve
In the threaded upper ends hole of needle fixture 24；313 upper end of needle is protruded into the lower end aperture of needle fixture 24.
Preferably, connection component 2 further includes the first locking nut 15, the second locking nut 23, lateral lock-screw 25, subtracts
Shake ring 22 and vibration damping sheet 26；The mode that sealing sleeve pipe is connect with connecting bracket 20 is to be equipped with installation circle in 20 upper surface of connecting bracket
Hole, sealing sleeve pipe lower end pass through installation circular hole, are equipped with the first lock positioned at the sealing sleeve pipe periphery of 20 upper surface lower part of connecting bracket
Tight nut 15, sealing sleeve pipe and 20 upper surface of connecting bracket are fixed by the first locking nut 15；Preferably, in 12 lower end of valve rod
Equipped with external screw thread, internal screw thread is equipped in the upper cavity of needle fixture 24,12 lower end of valve rod and 24 upper end of needle fixture are through screw thread
Connection；Preferably, 12 periphery of valve rod on needle fixture 24 is equipped with the second locking nut 23, and 12 lower end of valve rod and needle press from both sides
It is fixed by the second locking nut 23 to have 24 upper ends；Preferably, 313 upper end of needle passes through side in the lower end aperture of needle fixture
Fixed to lock-screw 25, lateral lock-screw 25 is arranged on the side wall of 24 lower end of needle fixture.
Preferably, movable easy detachable is cased on the valve rod 12 between the first locking nut 15 and the second locking nut 23
C-type or O-shaped shock ring 22, the stroke upper limit for replacing the adjustable needle fixture 24 of shock ring 22 of different height (stop
Stop bit)；Preferably, the lower end surface of needle fixture 24 is pasted with vibration damping sheet 26, when needle fixture 24 moves upwardly into stop position, subtracts
The spacing of shake piece 26 and 20 bottom upper surface of connecting bracket is the stroke H0 of valve rod 12 and needle 313.
Preferably, it sets there are four circular hole 21, can connect on middle fixing plate by the way that the X-axis slide block of screw and 3D printer is fixed
It connects, forms single spraying head assembly.
Barrel portion 3 includes guide sleeve 30, barrel valve 31, printing head 32 and casing jam nut 33；Wherein, guide sleeve
Pipe 30 is fixedly connected with connecting bracket 20；Guide sleeve 30 is ladder hollow cylinder structure, and it is empty that upper end inflated diameter is less than lower end
Core diameter forms the first limit 301 at ladder；As shown in figure 3, barrel valve 31 is periphery stepped cylindrical structure, outside the cylinder of upper end
All diameters are small, and lower end cylindrical periphery diameter is big, and the second limit 318 is formed at the ladder of periphery；Barrel valve 31 is arranged in guide sleeve
In 30,31 lower end cylindrical periphery diameter of barrel valve is identical as 30 lower end inflated diameter of guide sleeve, outside 31 upper end cylinder of barrel valve
All diameters are identical as 30 upper end inflated diameter of guide sleeve；31 outer wall of barrel valve is closely slidably matched with 30 inner wall of guide sleeve.
First limit 301 is moved up for limiting the second limit 318 of barrel valve 31；The inner cavity top of guide sleeve 30 is equipped with bullet
The lower end of spring 300, guide sleeve 30 is equipped with axial slotted opening 302 and circumference external screw thread, and the lower end of guide sleeve 30 passes through
External screw thread is connect with casing jam nut 33；31 lower end of barrel valve is equipped with material chamber 316, and the lower end of material chamber 316 is discharge port
312, material 316 side of chamber is connected to the feed inlet 311 for stretching out 31 lower end exterior circular column of barrel valve；The laterally setting of feed inlet 311
In slotted opening 302；The width of slotted opening 302 is equal to the outer diameter of feed inlet 311, and feed inlet 311 is allowed to enter from bottom
And limit the rotation of barrel valve 31；316 upper end of material chamber of barrel valve 31 is equipped with top pin hole 315；313 lower end of needle is equipped with close
Valve head 3131 is sealed, needle 313 passes through discharge port 312, material chamber 316, top pin hole 315 and spring 300 from bottom to top, with needle
Fixture 24 connects；Sealing valve head 3131 is located in discharge port 312；The diameter for sealing valve head 3131 is equal to the inner cavity of discharge port 312
Diameter, the intracavity diameter of discharge port 312 are greater than the intracavity diameter of material 316 lower end of chamber.Needle 313 is with top pin hole 315 in close
Envelope sliding interference fit.
Printing head 32 includes spray head feed inlet 320, spray head material chamber 321 and printing spout 322, spray head feed inlet 320
It is mutually nested with the discharge port 312 of barrel valve 31 positioned at the upper end of spray head material chamber 321, it is in tight interference fit, prints spout
322 be preferably elongated tubular flat mouth structure (the flat mouth structure of printing spout 322 is for inclined opening structure), upper end and spray head
Material chamber 321 communicates；Casing jam nut 33 is cavity structure, and cavity top is cylindrical, internal screw thread is equipped with, with guide sleeve
The external screw thread of 30 lower ends is fitted close at gapless, and cavity lower part is equipped with opening in cone, bottom；Printing head 32 is located at set
In the cavity of pipe jam nut 33, printing spout 322 stretches out the bottom opening of casing jam nut 33.
Preferably, the discharge port 312 of barrel valve 31 is equipped with Embedded Double screw thread 317, the feed inlet 320 of printing head 32
Outside is equipped with bayonet or screw socket, and discharge port 312 and feed inlet 320 are fitted close by double thread, constitutes securely connection.
Preferably, the inner cavity of discharge port 312 and sealing valve head 3131 are in up-narrow and down-wide cone-shaped, when on needle 313
The inner cavity that valve head 3131 and discharge port 312 are sealed when shifting forms sealing cooperation, closes discharge port 312, discharging is then opened when moving down
Mouth 312；When sealing the opening discharge port 312 of valve head 3131, in the material chamber 321 of printing head 32, but material chamber is not contacted
321 side wall and bottom.The feed inlet 311 of barrel valve 31 is located in the slotted opening 302 of guide sleeve 30, and and slotted opening
302 are closely slidably matched；Feed inlet 311 can pass through single component liquid material feeding unit outside hose and print head or double groups
Part fluent material mixing feeding unit connection.
Preferably, the mode that guide sleeve 30 is fixedly connected with connecting bracket 20 is that 20 lower end surface of connecting bracket is equipped with connection
Circular hole, the top of guide sleeve 30 are located at connected circular hole, and connecting bracket lower end surface side is equipped with threaded hole, is equipped with side in threaded hole
It is by lateral register screw 303 that connecting bracket lower end and guide sleeve 30 is fixed to positioning screw 303.
In order to which print head can work normally, the first air inlet 13 and the second air inlet 14 of cylinder part 1 should be respectively by fast
The gas source that changing-over head connects 25 outside print head logical (or 24 logical) solenoid valves with tracheae and pressure limit is 0.1-1MPa；
Meanwhile the barrel valve 31 being in close state is headed into guide sleeve 30 to two limits (the first limit 301 and the second limit
318) inconsistent, needle 313 is fixedly connected after passing through spring 300 with the needle fixture in stop position；Casing jam nut 33
Some position is threadedly secured in the lower end of guide sleeve 30.The on-off for controlling solenoid valve, when 14 air inlet of the second air inlet, the
When one 13 outlet of air inlet, piston body 11 is up to stop position with ovable valve stem 12 and needle 313, on the contrary then go downwards to working position.
As shown in Figure 4, Figure 5 and Figure 6, revoling tube jam nut 33, the top of adjustable casing jam nut 33 with
The spacing H1 of 311 bottom of feed inlet of barrel valve 31；When H1 is greater than zero and is less than the stroke H0 of needle 313,31 He of barrel valve
Printing head 32 can move down H1 with the downlink of needle 313 under the effect of top spring 300, until feed inlet 311 and casing
Jam nut 33 is inconsistent, and moving distance H1 at this time is the stroke H1 of printing head 32 (see Fig. 4 and Fig. 5)；Needle 313 after
When continuous downlink, sealing valve head 3131 opens discharge port 312, and printing head 32 enters working condition (see Fig. 6)；313 uplink of needle
When, sealing valve head 3131 closes discharge port 312, and 32 fracture resorption of printing head simultaneously moves up H1 with barrel valve 31 together, until the
Two limits 318 and the first limit 301 are inconsistent, and printing head 32 stops working.
It can be seen that single spraying head assembly is at work, printing head may be implemented with the change quick-expansion of working condition
With on-off material, not wire drawing not tear drop will not scratch model, significantly improve print quality, and without additional installation motor,
Electromagnet or other power devices, small in volume, structure is simple, convenient for safeguarding.
The present embodiment can also be required according to printing, replace different liquid materials at any time, such as various photosensitive resins, high score
Sub- dispersion liquid, liquid biological material, cream cake or cement mortar etc.；It is required according to the characteristic of liquid material and printing, it can be with
The printing head for easily replacing various specifications, as the thin spray head of long tube is used to print unsupported three-dimensional mould in coagulant liquid
Type, the thick spray head of taper is for printing highly viscous liquid silica gel, and black non transparent spray head is for printed photosensitive resin etc..
Embodiment 2
As shown in fig. 7, using two 3D printer fluent material print heads of structure same as Example 1, according to phase
With being highly mounted side by side in the X-axis slide block of 3D printer, constituting a kind of biliquid double end print components.Wherein, first printing
Head is for printing the first fluent material, and second print head is for printing second of fluent material.Two kinds of fluent materials can be with
For the same material of different colours, or the dissimilar material of different physical property.Two print heads can be according to respectively printing
Fluent material characteristic and printing require the printing head of selection different size.
The Gcode file that double-colored or double material models are produced using 3 d modeling software and Slice Software, is input to 3D
In printer, it can control two print heads by each layer structure of respective motion profile printing alternate.In n-th layer printing, if
First printhead prints finishes the first fluent material, when needing to continue to print second of fluent material, first print head
The first air inlet 13 outlet is become from air inlet, the second air inlet 14 becomes air inlet from outlet, and piston body 11 drives needle 313
Uplink H0 simultaneously shrinks H1 to stop position, first print head fracture resorption；At the same time, the first air inlet of second print head
13 become air inlet from outlet, and the second air inlet 14 becomes outlet from air inlet, and piston body 11 drives 313 downlink H0 of needle to work
Position, second print head stretch out H1 and start to print.First print head is located always in the print procedure of second print head
In stop position, not wire drawing not tear drop will not scratch the model surface printed, significantly improve print quality.It is beaten by second
Print head has equivalent effect when switching to first print head, until terminating entire print out task.
The present embodiment is mainly used for explanation and uses a kind of more than two 3D printer fluent material print heads of the invention
A kind of biliquid double end print components or a kind of more liquid bull print components can be designed and produced.Biliquid double end described in the present embodiment
Print components can both print the same material model (cardiac module such as comprising red blood vessel) comprising regions of different colours,
The dissimilar material model (the human body silica gel model such as comprising hydroxyapatite bone structure) of unlike material structure can be printed.Two
A print head can also require the printing head of selection different size according to the fluent material characteristic and printing respectively printed.Due to
Two print heads all have automatic telescopic and fracture resorption function, thus compared with non-telescoping print head or with by it
His power device realizes that flexible print head is compared, and two print heads are not interfere with each other in print procedure, significantly improve printing matter
Amount, and structure is simply light and handy, it is energy-efficient, it is easy to maintain.
Embodiment 3
As shown in Figure 8, Figure 9, using a 3D printer fluent material print head of structure same as Example 1, with
Solid plastic silk material print head in the prior art is mounted side by side according to identical height in the X-axis slide block of 3D printer, constitutes
A kind of solid-liquid double end print components.Wherein, liquid print head is used for printing fluid material, and solid print head is for printing plastic wire
Material.Plastics silk material can be used as the backing material of fluent material or framework material or serve as other function.Liquid print head
It is required according to the characteristic of fluent material and printing, selects the printing head of appropriate size.
The Gcode file that double material models are produced using 3 d modeling software and Slice Software, is input to 3D printer
In, it can control two print heads by each layer structure of respective motion profile printing alternate.Since traditional plastics print head does not have
There is Telescopic, to avoid its interference to model, in Gcode documenting, the working position of solid print head should be designed
For the working position higher than liquid print head, the difference in height dZ of the two is between 0 and H1, preferably H1/2.
In n-th layer printing, if liquid printhead prints finish fluent material, when needing to continue to print plastics silk material,
First air inlet 13 of liquid print head becomes outlet from air inlet, and the second air inlet 14 becomes air inlet, 11 band of piston body from outlet
313 uplink H0 of needle is moved to stop position, liquid print head fracture resorption simultaneously shrinks H1；At the same time, print routine controls Z axis
Workbench improves the working position of dZ to solid print head, and solid print head starts to work (see Fig. 8).Switch when by solid print head
When to liquid print head, print routine first controls Z axis workbench and declines dZ to the working position of liquid print head, and then liquid prints
First air inlet 13 of head becomes air inlet from outlet, and the second air inlet 14 becomes outlet from air inlet, and piston body 11 drives needle
For 313 downlink H0 to working position, liquid print head starts to work (see Fig. 9).In the work of solid print head, liquid print head is always
In stop position, not wire drawing not tear drop will not scratch the model surface printed, significantly improve print quality；Liquid is beaten
There is equivalent effect when printing head work, until terminating entire print out task.
The present embodiment is mainly used for explanation and uses an a kind of 3D printer fluent material print head of the invention and one
A solid plastic silk material print head in the prior art can design and produce a kind of solid-liquid double end print components.The solid-liquid double end is beaten
Print component can both print the fluent material model (liquid silicon such as comprising ABS plastic support comprising solid plastic support construction
Rubber moulding type), the fluent material model (biology such as comprising PLA skeleton structure comprising solid plastic skeleton structure can also be printed
Material model).Liquid print head can also require the printing head of selection different size according to the characteristic and printing of fluent material.
Since liquid print head has the function of automatic telescopic and fracture resorption, compared with non-telescoping print head or with by
Other power devices realize that flexible print head is compared, and two print heads are not interfere with each other in print procedure, significantly improve printing
Quality, and structure is simply light and handy, it is energy-efficient, it is easy to maintain.
Above three embodiments illustrate that a kind of 3D printer of the invention is respectively used to single head with fluent material print head
Significant technical advantage is all had when the assembling designs of printing equipments such as printing, the printing of biliquid double end and the printing of solid-liquid double end:
1. the cylinder part upper end that the present invention uses manually controls flow without additional addition stroke adjusting device, it is only necessary to logical
It crosses the shock ring of replacement different height or adjusts the stroke that the height at the top of guide sleeve suitably to adjust needle, pass through outside
Feeding control system automatically adjusts the flow and print speed of liquid material, and structure is simply small and exquisite, securely and reliably；
2. the printing head in the barrel portion that the present invention uses can be same with moving up and down for needle when working start and stop
Shi Shixian automatic telescopic and material on-off, it is simple and compact for structure without adding additional power device, it is energy-efficient, further
The volume and weight for mitigating print head significantly improves the movement speed and printing precision of print head, and the advantage is when bull prints
It is particularly evident；
3. the present invention can be conveniently adjusted the telescopic height of printing head by can be manually rotated casing jam nut, assign
The good scalability of fluent material print head and fracture resorption function are given, effectively avoids printing head quick in nonprinting region
To the destruction of model appearance and the interference when bull prints between each spray head when mobile, print quality is significantly improved；
4. the present invention be dexterously utilized barrel valve and printing head reciprocating movement needle and top spring it is dual
Quick-expansion and material on-off may be implemented under effect, it is simple and compact for structure without additional addition power device, it is energy-efficient,
Thoroughly solve technical problem or technology generally existing when the printing of fluent material single head or bull in the prior art prints
Defect, such as certain prior arts (Chinese invention patent application CN107053662A, CN109016070A, CN109203174A)
It is easily destroyed model surface due to printing grease head highness and fixing, and other prior art (Chinese invention patent applications
CN106626388A, CN108790145A and Chinese utility model patent CN206781005U, CN206926264U,
CN207549494U, CN207682959U etc.) in order to change printing grease head highness need additional electromagnetism or electric device, lead
Volume, weight and the energy consumption of printing equipment is caused to dramatically increase.
It should be understood by those skilled in the art that the above embodiments and description only describe bases of the invention
Present principles and main feature, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention,
These changes and improvements belong in scope of the claimed invention.Claimed range of the invention is wanted by appended right
It seeks book and its equivalent defines.
Claims (10)
1. a kind of 3D printer fluent material print head, it is characterised in that: mainly by sequentially connected cylinder part from top to bottom,
Connection component and barrel portion composition；The cylinder part includes cylinder block, piston body and valve rod；One is equipped in the gas chamber of cylinder block
It is a to seal the piston body being slidably matched with air chamber wall；Piston body is fixedly connected with the upper end of valve rod, above and below piston body
Gas chamber sidewall is respectively equipped with the first air inlet and the second air inlet；First air inlet and the second air inlet are connected to gas source respectively；
The connection component mainly includes connecting bracket and needle fixture；Needle fixture, needle fixture are equipped in connecting bracket
Upper end and connecting bracket upper end lower surface form spacing, and needle clamp base and connecting bracket upper base surface form spacing；Gas
The bottom of cylinder body is equipped with a sealing sleeve pipe being slidably matched with valve stem seal；Sealing sleeve pipe upper end and the bottom of cylinder block connect
It connects, lower end is protruded into connecting bracket, is connect with connecting bracket；Valve rod lower end stretches out cylinder body passes through sealing into sealing sleeve pipe
It is connect after casing with needle fixture upper end；
The barrel portion mainly includes guide sleeve, barrel valve, printing head and casing jam nut；The guide sleeve
It is fixedly connected with connecting bracket；Guide sleeve is ladder hollow cylinder structure, and upper end inflated diameter is less than lower end inflated diameter, rank
The first limit is formed at ladder；Barrel valve is periphery stepped cylindrical structure, and upper end cylindrical periphery diameter is small, lower end cylindrical periphery diameter
Greatly, the second limit is formed at the ladder of periphery；Barrel valve is arranged in guide sleeve, the outer wall of barrel valve and the inner wall of guide sleeve
Closely it is slidably matched；The inner cavity top of guide sleeve is equipped with spring, and the lower end of guide sleeve is equipped with axial slotted opening and circle
All external screw threads；Barrel valve lower end be equipped with material chamber, expect chamber lower end be discharge port, material chamber laterally with stretch out barrel valve lower end
The feed inlet of exterior circular column is connected to；Feed inlet is horizontally set in slotted opening；The material chamber upper end of barrel valve be equipped with one with
Needle seals the top pin hole being slidably matched；Needle lower end is equipped with sealing valve head, and needle passes through discharge port, material chamber from bottom to top
Room, top pin hole and spring are fixedly connected with needle fixture lower end；Sealing valve head is located in discharge port；Seal the diameter of valve head
Equal to the intracavity diameter of discharge port, greater than the intracavity diameter of material chamber lower end；
The printing head includes that spray head feed inlet, spray head material chamber and printing spout, spray head feed inlet are located at spray head material chamber
The upper end of room, it is mutually nested with the discharge port of barrel valve, it is in tight interference fit, prints spout upper end and spray head material chamber phase
It is logical；Casing jam nut is cavity structure, and cavity top is cylindrical, is equipped with internal screw thread, the external screw thread with guide sleeve lower end
Connection, cavity lower part are equipped with opening in cone, bottom；Printing head is located in the cavity of casing jam nut, prints spout
The bottom opening of lower end stretching casing jam nut.
2. 3D printer according to claim 1 fluent material print head, it is characterised in that: on the needle fixture
End is equipped with threaded hole, and lower end is equipped with aperture；The mode that valve rod is connect with needle fixture upper end is to be threadedly coupled；Needle and needle press from both sides
The mode for having lower end connection is that needle protrudes into the aperture of needle fixture lower end, and needle upper end leads in the lower end aperture of needle fixture
It crosses lateral lock-screw to fix, lateral lock-screw is arranged on the side wall of needle fixture lower end.
3. 3D printer according to claim 1 fluent material print head, it is characterised in that: the connecting bracket is
The frame-type structure of opening, including the upper and lower end face being parallel to each other and the middle fixing plate being connect with upper and lower end face；The frame-type of opening
Needle fixture is equipped in structure；Middle fixing plate is equipped with multiple circular holes, passes through the X-axis slide block of circular hole and screw and 3D printer
It is fixedly connected.
4. 3D printer according to claim 1 fluent material print head, it is characterised in that: the connecting bracket upper end
Face is equipped with installation circular hole, and sealing sleeve pipe lower end passes through installation circular hole, positioned at the sealing sleeve pipe periphery of connecting bracket upper surface lower part
Equipped with the first locking nut, sealing sleeve pipe is fixed with connecting bracket upper surface by the first locking nut.
5. 3D printer according to claim 4 fluent material print head, it is characterised in that: on the needle fixture
The stem outer circumference in face is equipped with the second locking nut, and valve rod lower end is fixed with needle fixture upper end by the second locking nut；
C-type or O-shaped shock ring are cased on valve rod between one locking nut and the second locking nut.
6. 3D printer according to claim 1 fluent material print head, it is characterised in that: the needle fixture
Lower end surface is pasted with vibration damping sheet, and vibration damping sheet is circular plastic thin slice, and center is equipped with circular hole.
7. 3D printer according to claim 1 fluent material print head, it is characterised in that: the guide sleeve with
The mode that connecting bracket is fixedly connected is that connecting bracket lower end surface is equipped with connected circular hole, and the top of guide sleeve is located at connection circle
Hole, connecting bracket lower end surface side are equipped with threaded hole, are equipped with lateral register screw in threaded hole, will even by lateral register screw
Pedestal lower end is connect to fix with guide sleeve.
8. 3D printer according to claim 1 fluent material print head, it is characterised in that: the printing spout is
Elongated tubular flat mouth structure.
9. 3D printer according to claim 1 fluent material print head, it is characterised in that: first air inlet
Pass through quick-release connector and solenoid valve respectively with the second air inlet to connect with gas source.
10. 3D printer according to claim 1 fluent material print head, it is characterised in that: the 3D printer
It is more than two combinations with fluent material print head, more than two 3D printers are with fluent material print head according to identical height
It is mounted side by side in the X-axis slide block of 3D printer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689778.0A CN110524868B (en) | 2019-07-29 | 2019-07-29 | Liquid material printing head for 3D printer |
| PCT/CN2020/070671 WO2021017415A1 (en) | 2019-07-29 | 2020-01-07 | Liquid material printhead for 3d printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689778.0A CN110524868B (en) | 2019-07-29 | 2019-07-29 | Liquid material printing head for 3D printer |
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| CN110524868B CN110524868B (en) | 2023-09-08 |
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| WO (1) | WO2021017415A1 (en) |
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| CN112078130A (en) * | 2020-07-28 | 2020-12-15 | 广西机电职业技术学院 | Wire drawing adhesion preventing device of 3D printer |
| WO2021017415A1 (en) * | 2019-07-29 | 2021-02-04 | 华南理工大学 | Liquid material printhead for 3d printer |
| CN114536741A (en) * | 2022-04-28 | 2022-05-27 | 哈尔滨理工大学 | Device for realizing combined printing of rigid and flexible materials with different properties |
| JP2023520447A (en) * | 2020-04-03 | 2023-05-17 | 蘇州美梦機器有限公司 | 3D printing device and its control method |
| CN118141000A (en) * | 2024-05-13 | 2024-06-07 | 福建农林大学 | Chocolate 3D printing method added with functional components |
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| CN114734631A (en) * | 2022-03-10 | 2022-07-12 | 浙江师范大学 | 3D prints shower nozzle and 3D printer |
| CN117021577B (en) * | 2023-10-09 | 2023-12-08 | 华南理工大学 | Multifunctional integrated 3D printing module and application method thereof |
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| WO2021017415A1 (en) | 2021-02-04 |
| CN110524868B (en) | 2023-09-08 |
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