CN110239095A - A kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used - Google Patents
A kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used Download PDFInfo
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- CN110239095A CN110239095A CN201910524128.0A CN201910524128A CN110239095A CN 110239095 A CN110239095 A CN 110239095A CN 201910524128 A CN201910524128 A CN 201910524128A CN 110239095 A CN110239095 A CN 110239095A
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- heat
- pipe
- aeroge
- heat block
- wrapping layer
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- 239000000835 fiber Substances 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 44
- 210000004907 gland Anatomy 0.000 claims abstract description 39
- 239000007921 spray Substances 0.000 claims abstract description 31
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052681 coesite Inorganic materials 0.000 claims description 9
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- 239000003292 glue Substances 0.000 claims description 7
- 239000012815 thermoplastic material Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
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- 229920000747 poly(lactic acid) Polymers 0.000 description 6
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- 241001416181 Axis axis Species 0.000 description 1
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Classifications
-
- 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
-
- 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
Abstract
A kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used, comprising: heat block, gland pipe, fiber duct, trunnion, heat-dissipating pipe, spray head, aeroge wrapping layer, silk material are oriented to pipe fitting, polyfluortetraethylene pipe, polyimides heat insulating mattress.The present invention carries out Thermal Environment Control to space 3D printing head assembly using aeroge wrapping layer; both meet the high temperature demands of heat block and printing head region, and also met the low temperature environment demand of other attachmentes of print head periphery, and reduce waste heat radiation; the energy is efficiently utilized, effective thermal insulation protection is established.The method of the present invention has using material is few, implementing process is convenient, at low cost, pollution-free, space-orbit 3D printing energy saving, good effect of heat insulation.
Description
Technical field
The present invention relates to a kind of in-orbit binary channel 3D printing heads based on aeroge wrapping layer used, belong to space and increase material
Manufacturing field.
Background technique
Printing head is the core component of 3D printer, and the micro environment control near printing head is to determine printed product
It can be with the key factor of quality.3D printing former currently on the market is limited without energy consumption substantially, in order to reach poly- cream
The softening point of the materials such as acid, polyether-ether-ketone, spray head heat block have used powerful electrically heated rod, by printing head from room temperature pole
Speed is warming up to the temperature such as 210 DEG C, 350 DEG C.And most of polylactic acid printer cabins are open state, spray head extruded material arrives
When up to substrate, pass through fan and reinforce cross-ventilation, realizes cooling molding.This print head heating method is applied in spacecraft module
It is had the following problems when the 3D printing of space:
1) heat block is main energy-consuming parts.During the 3D printing of ground, by powerful heating rod, it can make to print
Spray head is brought rapidly up, and continuous heating keeps nozzle temperature to be higher than material melt temp, and this mode heated always needs to hold
It is continuous to expend the higher energy.Ground 3D printing is usually using 220V mains voltage or 360V industry voltage.And in space
The power supply that device can be given is usually 24~33V, and current control is relatively low, it is possible to provide power limited, can not for a long time
High power load is provided.
2) cross-ventilation is the main channel of heat dissipation.The fusion sediment for printing the materials such as polylactic acid on the market shapes 3D printing
Equipment, most of is open equipment, i.e. print head and substrate is under air at room temperature convection environment, even if local temperature mistake
Height reinforces cross-ventilation by fan, can reduce the temperature of other component near spray head.2 are also provided on some print heads
A above fan, takes away waste heat by multiple airflow channels.Spacecraft inner space is limited, even if in sealed compartment
Increase cross-ventilation, air velocity and sphere of circulation are also very limited, and extra heat is brought in other load in cabin by fan
On, aggravate integrated environment heat load, it is clear that be unreasonable.
Summary of the invention
Technology of the invention solves the problems, such as: overcome the deficiencies in the prior art, propose it is a kind of it is in-orbit use based on gas
The binary channel 3D printing head of gel wrapping layer can efficiently utilize the energy, reduce waste heat radiation, both meet heat block and printing spray
The high temperature demands of head, also meet the low temperature environment demand of other attachmentes of print head periphery, establish effective thermal insulation protection.
The technical scheme is that
A kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used, comprising: heat block, gland pipe, fibre
It is heat-insulated to tie up conduit, trunnion, heat-dissipating pipe, spray head, aeroge wrapping layer, silk material guiding pipe fitting, polyfluortetraethylene pipe, polyimides
Pad；
The heat block is provided with the first access and alternate path, and the axis of first access and the axis of alternate path are total
Face and intersection；The value range of angle theta between the first access axis and alternate path axis is 15 °~60 °；
First access is ladder hole, one end of one end connection fiber duct of first access, the fiber
The other end of conduit is fixedly connected with one end of gland pipe, and the other end of the gland pipe stretches out the heat block；The gland pipe
Being connected through a screw thread heat block fixes position of the fiber duct in heat block；The other end of first access and spray
Head is fixedly connected；
The alternate path is stepped hole, and one end of the alternate path is connected to first access；Trunnion, heat dissipation
Pipe, silk material guiding pipe fitting are sequentially connected, and the end of the trunnion is fixedly connected with the other end of the alternate path；
The end of the spray head is provided with cone tank, and the cavity that the cone tank and the first access inner wall surround is as molten
Pond；Polyfluortetraethylene pipe is inserted into the trunnion from silk material guiding pipe fitting, heat-dissipating pipe, and the polyfluortetraethylene pipe is used for will
Thermoplastic material imports in the molten bath；Continuous fiber reinforcement passes sequentially through the gland pipe, fiber duct flows into described melt
In pond；
The intersection point of the first access axis and alternate path axis is located at the molten bath as molten accumulation, the molten accumulation
It is interior；The molten accumulation position meets following proportionate relationships:
D1:d2:d3=1:1:0.45,
Wherein, d1 be the molten accumulation to heat block surface at a distance from the intersection point that the gland pipe axis intersects vertically,
D2 be the molten accumulation to heat block surface at a distance from the intersection point that the trunnion axis intersects vertically, d3 arrives for the molten accumulation
Heat block surface is at a distance from the intersection point that the spray head axis intersects vertically；
The internal diameter of the gland pipe is greater than the internal diameter of the fiber duct, and the internal diameter of the alternate path is greater than the fiber
The internal diameter of conduit；The internal diameter that the spray head connect one end with first access is greater than the internal diameter of the alternate path；
The outer wall phosphoric acid of the heat block is handled；The outer wall of the heat block is enclosed with for heat-insulated aeroge
Wrapping layer, the material of the aeroge wrapping layer are that oxidization fiber enhances SiO2Aeroge, the thickness of the aeroge wrapping layer
Value range is 1~5mm；
It is fixed with polyimides heat insulating mattress on the end face of the heat block installation gland pipe, the polyimides heat insulating mattress is opened
There is central through hole, the gland pipe passes through the polyimides heat insulating mattress central through hole and is inserted into the heat block；The heat block
Inside it is provided with the heating rod and multiple temperature sensors for heating to the heat block.
Compared with the prior art, the invention has the advantages that:
1) ground 3D printer heat block does not consider heat-insulating problem usually at present, occasionally have printer selected heat-insulated felt,
Glass fiber reinforcement aeroge is as cabinet insulation material；Felt is that spacecraft is limited with material, glass fiber reinforcement aeroge
Adhesive force is low, and the two is also easy to produce clast, picking under the environment such as microgravity, vibration, forms fifth wheel, influences other electronics devices
Part.The present invention, as reinforcement, utilizes sol-gel and supercritical CO using ultra-fine oxidization fiber fiber2Drying process passes through essence
True structure and Properties Control produces the high-performance oxidization fiber fiber-reinforcement silicon dioxide airsetting for meeting space environment demand certainly
Glue, density range are 0.15~0.4g/cm3, room temperature thermal coefficient range is 0.012~0.018W/ (mK), is had splendid
Bending performance and anti-seismic performance will not lose powder under the high-frequency vibration of Spacecraft Launch, not generate clast, and density is light, leads
Heating rate is high, can play preferable heat insulation and be amenable to biggish load impacting；
2) traditional multichannel 3D printing often will appear material it is counter gush, spray head blocking situations such as, main cause is thermoplasticity
The large viscosity of material, poor fluidity, the mismatches such as material warms speed, wire feed rate, printing shaping speed cause.The present invention exists
The coupling Simulation in fluid and temperature field is carried out in twin-channel design, the accuracy controlling folder of first passage and second channel
Angle and two passes center point and optimize the cone tank above spray head to the distance of each end face of heat block, so that double
The resistance that channel flows to spray head is much smaller than the resistance of opposite direction, even if twin-channel material is along spray under the zero-g environment of space
Smooth outflow, the case where avoiding adverse current blocking channel；
3) traditional heating block is generally rectangular, cannot fully wrapped around heating rod, there are the characteristics that heating rod energy leakage, and
There is usually one temperature sensors, carry out heating closed-loop control using this temperature, cause the actual temperature of printing head inclined
Difference is affected for the mobility of thermoplastic material at ± 10 DEG C or so.The heat block that the present invention designs is boss and plane
The form combined had not only guaranteed to wrap up heating rod comprehensively, but also used the closed-loop control that double temperature sensor is iterated.Two
Temperature sensor measures active heating temperature and passive transition temperature respectively, can accurately calculate the printing of binary channels confluence
Temperature above spray head, by heating closed-loop control, it is ensured that in whole printing process, molten bath zone temperature above spray head
Deviation has ensured the stabilization of Thermoplastic materials flow at ± 3 DEG C, so that printing is more smoothly.
4) present invention is designed and manufactured, and there is bell-mouthed silk material to be oriented to pipe fitting, so that containing second channel silk material
Polyfluortetraethylene pipe can vibrate in a big way, stress is concentrated on the curved surface of a gradual change, reduce polytetrafluoroethyl-ne
The risk of alkene pipe fatigue fracture in harsh mechanics vibration environment.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is structure of the invention axial sectional view；
Fig. 3 a is heat block cross-sectional view of the present invention；
Fig. 3 b is heat block side view of the present invention；
Fig. 4 is that silk material of the present invention is oriented to pipe fitting sectional view；
Fig. 5 is that aeroge wrapping layer of the present invention cuts out shape and pastes precedence diagram；
Fig. 6 is polyimides heat insulating mattress side view of the present invention；
Fig. 7 is gland pipe of the present invention and fiber duct connection schematic diagram.
Specific embodiment
A kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used of the invention, comprehensively considers printing head
High temperature demands and surrounding other attachmentes cold operation demand, optimize heat transfer approach, guaranteeing temperature inside printing head
While spending, reduces waste heat lost outward and, so that heat concentrates on effective coverage, subtracted by micro environment control heat-insulating method
The local thermal control of few other attachmentes of printer, reduces the electricity consumption of integral printer.
Further detailed description is done to the present invention with reference to the accompanying drawings and detailed description.
As shown in Figure 1, being schematic structural view of the invention, the aeroge wrapping layer 7 and polyimides of 1 outside of heat block are heat-insulated
Pad 10 is to realize to reduce energy consumption, reduces the major part of heat dissipation.As shown in Fig. 2, the present invention it is a kind of it is in-orbit use based on airsetting
The binary channel 3D printing head of glue wrapping layer, comprising: heat block 1, gland pipe 2, fiber duct 3, trunnion 4, heat-dissipating pipe 5, spray head 6,
Aeroge wrapping layer 7, silk material are oriented to pipe fitting 8, polyfluortetraethylene pipe 9, polyimides heat insulating mattress 10.
The material of heat block 1 is aluminium alloy, and the heat block 1 is internally provided with heating rod 11,12 and of temperature sensor
Temperature sensor 13, the temperature sensor 12 and the temperature sensor 13 are specifically realized using NTC thermistor.It is described to add
Heat block 1 is provided with the first access and alternate path, axis co-planar and the intersection of the axis and alternate path of first access；It is described
The value range of angle theta between first access axis and alternate path axis is 15 °~60 °, the specific embodiment of the present invention
In angle theta value between the first access axis and alternate path axis be 45 °.First access is ladder hole, described
One end of one end connection fiber duct 3 of first access, the other end of the fiber duct 3 are fixedly connected with one end of gland pipe 2,
The other end of the gland pipe 2 stretches out the heat block 1；The gland pipe 2, which is connected through a screw thread heat block 1, leads the fiber
Position of the pipe 3 in heat block is fixed；The other end of first access is fixedly connected with spray head 6.Heating rod 11 passes through external
Power supply is that heat block 1 heats, so that the molten thermoplastic material in alternate path, the thermoplasticity material that is used in the embodiment of the present invention
Material is specially polylactic acid (Polylactic acid, PLA), can also select the thermoplastic materials such as polyether-ether-ketone, polyether ketone ketone.
Temperature sensor 12 is used to test the heating rod temperature that nearby heat block actually reaches, as active heating temperature, temperature sensing
Device 13 is for testing temperature of the heat block near binary channels joint, as passive heat transfer temperature.Pass through temperature sensor
12 and the temperature of temperature sensor 13 can accurately be calculated at binary channels joint in conjunction with the thermal coefficient of heat block
Temperature, it is ensured that accurately range is being compared in heating closed-loop control.
The alternate path is stepped hole, and one end of the alternate path is connected to first access, such as Fig. 3 (a) institute
Show.Trunnion 4, heat-dissipating pipe 5, silk material guiding pipe fitting 8 are sequentially connected, and the end of the trunnion 4 is another with the alternate path
End is fixedly connected.
The end of the spray head 6 is provided with cone tank, the cavity conduct that the cone tank and the first access inner wall surround
Molten bath；The center that molten bath center is in binary channel is converged in range, and the molten bath center that is recessed in the embodiment of the present invention is in binary channel
Center point below 1.2mm, the i.e. intersection point of 6 upper surface of spray head and the first access axis axis and that is located at the first access
Above the crossing point of axes of two accesses at 1.2mm.Polyfluortetraethylene pipe 9 is inserted into institute from silk material guiding pipe fitting 8, heat-dissipating pipe 5
Trunnion 4 is stated, the polyfluortetraethylene pipe 9 is for importing thermoplastic material in the molten bath；Continuous fiber reinforcement is successively led to
Cross the gland pipe 2, fiber duct 3 flows into the molten bath, continuous fiber reinforcement specifically uses carbon in the embodiment of the present invention
Fiber, trade mark T300-1K can also select aramid fiber.Continuous fiber reinforcement and heated piece of molten bath of thermoplasticity silk material
Region forms composite material.The heat-dissipating pipe 5 is circumferential to be provided with radiation tooth.The polyfluortetraethylene pipe 9 is hollow plastic tube.
The intersection point of the first access axis and alternate path axis is located at the molten bath as molten accumulation, the molten accumulation
It is interior；The molten accumulation position meets following proportionate relationships:
D1:d2:d3=1:1:0.45,
Wherein, the d1 intersection point that be the molten accumulation intersect vertically to 1 surface of heat block and 2 axis of gland pipe away from
From, d2 be the molten accumulation to 1 surface of heat block with the intersection point that 4 axis of trunnion intersects vertically at a distance from, d3 melts to be described
Accumulation is to 1 surface of heat block at a distance from the intersection point that 6 axis of spray head intersects vertically.
Gland pipe 2 is to be provided with externally threaded stainless steel cylindrical structure, and the gland pipe 2 is inserted across polyimides heat insulating mattress 10
Enter in heat block 1,2 lower end of gland pipe is provided with T-slot, is used for anchoring fiber conduit 3, and the fiber duct 3 is titanium alloy
Tubule；The internal diameter of fiber duct 3 is 0.8mm in the embodiment of the present invention, and the fiber that be able to meet first passage passes through and not superfluous
Complementary space prevents the polylactic acid reflux of second channel, and the upper end of fiber duct 3 is T-slot, with 2 lower end T-slot size of gland pipe
Matching forms crimping and fixes, as shown in Figure 7.The internal diameter of the gland pipe 2 be greater than the fiber duct 3 internal diameter, described second
The internal diameter of access is greater than the internal diameter of the fiber duct 3；The internal diameter that the spray head 6 connect one end with first access is greater than institute
State the internal diameter of alternate path.
The outer wall phosphoric acid of the heat block 1 is handled；The outer wall of the heat block 1 is enclosed with for heat-insulated airsetting
Glue wrapping layer 7, to avoid the leakage heat between different zones from guaranteeing aeroge in the processing for needing opening area to carry out 3M adhesive tape
Wrapping layer 7 does not leak heat.7 inside of aeroge wrapping layer is Nian Jie with heat block 1, and outside is in contact with gland pipe 2, trunnion 4, spray head 6,
To guarantee silk material before entering heat block 1 in lower temperature.The material of the aeroge wrapping layer 7 is oxidization fiber enhancing
SiO2Aeroge, oxidization fiber enhance SiO2The density value range of aeroge is 0.15~0.4g/cm3, room temperature thermal coefficient takes
Value range is 0.012~0.018W/ (mK), and oxidization fiber enhances SiO2Aeroge has splendid bending performance and shock resistance
Energy.The value range of 7 thickness of aeroge wrapping layer is 1~5mm, the thickness of aeroge wrapping layer 7 in the embodiment of the present invention
For 5mm, oxidization fiber enhances SiO2The reduction shape of aeroge film as shown in figure 5, need the position of aperture there are overlap joint surplus,
It is successively pasted on heat block 1 according to the sequence of A-G.
It is fixed with polyimides heat insulating mattress 10 on the end face of the installation of the heat block 1 gland pipe 2, the polyimides is heat-insulated
Pad 10 is provided with central through hole, and the gland pipe 2 passes through 10 central through hole of polyimides heat insulating mattress and is inserted into the heat block 1；
Polyimides heat insulating mattress 10 is connect by four screws with heat block 1, as shown in Figure 6.
The heating rod 11 and multiple temperature sensors for heating to the heat block 1, institute are provided in the heat block 1
State heat block 1 has protrusion, rising height in the embodiment of the present invention between first passage nozzle end and second channel trunnion end
5mm is provided with 3 through-holes on the heat block 1, and wherein 1 elevated regions of heat block are opened there are two through-hole, is respectively used to installation heating
Stick 11 and temperature sensor 12 are provided with through-hole at first passage and second channel center point amount in platform area, are used for
Mounting temperature sensor 13, as shown in Fig. 3 (b).
The free end of the silk material guiding pipe fitting 8 is horn mouth, so that the polytetrafluoroethylene (PTFE) containing second channel silk material
Pipe can vibrate in a big way, and will not fracture.The value range of the horn mouth cone angle is that 30~90 ° of present invention are real
Horn mouth cone angle=60 degree of silk material guiding pipe fitting 8 in example are applied, as shown in Figure 4.
Binary channel 3D printing head assembling process of the present invention, specific as follows:
Step 1: aeroge wrapping layer 7 cut out and aperture
The oxidization fiber aeroge sheet material for preparing 3~5mm thickness cuts and is suitble to according to the cross sectional shape of heat block different directions
The airsetting film of size, as shown in Fig. 3 b and Fig. 5, it is desirable that splicing seams are as few as possible, and needing the position of aperture, there are overlap joint surpluses.
Step 2: 1 surface of heat block coats aeroge 7
Heat block 1 is subjected to phosphoric acid anodised surfaces processing, to increase cementing strength.The oxidization fiber aeroge that will have been reduced
3M adiabatic gum band is pasted in piece side, is coated according to Fig. 5 sequence, and carries out sealing by structure glue, is formed as shown in Figure 2
Aeroge wrapping layer 7.Cladding sealing process will avoid hole, fold, make its smooth paving, opening area is needed to ensure that 3M is heat-insulated
Adhesive tape is greater than aeroge region.After aeroge wrapping layer 7 is fixed, whole aeroge region is twined clockwise using 3M adhesive tape
Around, it is ensured that corner, the adiabatic gum band of stitching portion are continuous.
Step 3: the installation of 1 first passage of heat block
As shown in fig. 6, processing the polyimides heat insulating mattress 10 for being suitble to size, fiber duct 3 is set above first passage
Enter in heat block 1, gland pipe 2 is passed through to the centre bore of polyimides heat insulating mattress 10, is screwed on heat block, screw face and gap
With GD414 glue sealing.In the first passage other end, spray head 6 is screwed on heat block 1, spray head outer rim and 1 surface of heat block
Aeroge 3M adhesive tape bonding guarantees seamless.
Step 4: the installation of 1 second channel of heat block
According to shown in Fig. 2, the distance that first passage and second channel joint are oriented to pipe fitting 8 to silk material is measured, and
Label is made on polyfluortetraethylene pipe 9.The polyfluortetraethylene pipe 9 of mark position is passed through into silk material guiding pipe fitting 8 and fixes it
Position.Trunnion 4, heat-dissipating pipe 5 are successively installed on the second channel of heat block 1, are mutually spirally connected in place, by polyfluortetraethylene pipe 9
It is inserted into heat-dissipating pipe 5 with the assembly of silk material guiding pipe fitting 8, until reaching trunnion depths.Second channel connection in place afterwards will even
Connect place's GD414 glue sealing.After heat block 1 installs fixed first passage and second channel with 3M adhesive tape to whole heat block into
Row cladding, reaches Fig. 1 kit form.
Embodiment
The power consumption and the temperature change of difference component when work of print head, assessment are obtained with test measurement by computer sim- ulation
The heat-insulated demand of different directions component.Experiment shows: the heat block 1 of print head is most important heat production source in all components, is beaten
Print process remains high temperature, and 1 external surface area of heat block is larger, is main radiation source, therefore establishes in print head surface
Heat shield is the source for reducing heat dissipation.Compare heat-preservation cotton, glass fiber reinforcement SiO2Aeroge and oxidization fiber enhance SiO2Gas
The heat insulation of gel tests the aeroge of tri- kinds of specifications of 1mm, 3mm, 5mm and the combined heat insulated performance of 3M adhesive tape, final to select
Surely it is directed to the power consumption of this TV station space 3D printer, the oxidization fiber that 5mm thickness is pasted on the outside of heat block 1 enhances SiO2Aerogel heat-proof
Effect is preferable, is coated and fixed by 5 layers of 3M adhesive tape.In addition, print head is thermally conductive also along the progress of wire-feeding pipe direction, if conduit temperature
Excessively high, silk material will melt before entering print head and lead to not normal print, to guarantee that 9 temperature of polyfluortetraethylene pipe is in
60 DEG C outside polyfluortetraethylene pipe 9 hereinafter, increase an annular fin heat-dissipating pipe 5, in gland pipe 2 and 1 contact zone of heat block
Domain increases the polyimides heat insulating mattress 10 of a 2mm thickness, to ensure that 2 temperature of gland pipe is normal.
Before the method for the present invention, after grinding 3D printer booting 5min certainly, print head external temperature rises to 90 DEG C.With
The continuous heating and material molten of printing head squeeze out, and print head external temperature has reached 110 DEG C or so, and continues entirely to print
Process.Printing head support part temperature has also reached 50 DEG C or more, and heat transfer of the heat-dissipating pipe by print head surrounding air, temperature reaches
48 DEG C.Each motor temperature is more than 40 DEG C, and circuit board controller temperature reaches 42 DEG C.From grinding 3D printer siding temperature highest
Up to 39 DEG C, 19 DEG C are higher by than environment temperature.These device surface temperature are excessively high, far more than design requirement and load capacity, and
And energy consumption is excessively high.After applying the present invention, it grinds 3D printer certainly to be equally switched on after 5min, print head external temperature only rises to 48
DEG C, as the continuous heating and material molten of printing head squeeze out, print head external temperature is up to 52 DEG C, and continues entire
Print procedure.At 37 DEG C or so, heat-dissipating pipe temperature is maintained within the scope of 40 DEG C printing head support part temperature, motor, circuit board, power supply
Side plate is controlled at 40 DEG C or less.From space 3D printer upper cover plate, downside plate temperature is ground at 22 DEG C or so, only compare Indoor Temperature
It spends 2 DEG C high.In summary, the method for the present invention obtains superperformance, printer work for the partial temperature control of 3D printer
Its surface temperature influences indoor environment temperature very small when making, and energy saving, realizes the efficient utilization of finite energy resource.
The content that description in the present invention is not described in detail belongs to the well-known technique of professional and technical personnel in the field.
Claims (7)
1. a kind of in-orbit binary channel 3D printing head based on aeroge wrapping layer used characterized by comprising heat block
(1), gland pipe (2), fiber duct (3), trunnion (4), heat-dissipating pipe (5), spray head (6), aeroge wrapping layer (7), silk material guiding
Pipe fitting (8), polyfluortetraethylene pipe (9), polyimides heat insulating mattress (10)；
The heat block (1) is provided with the first access and alternate path, and the axis of first access and the axis of alternate path are total
Face and intersection；The value range of angle theta between the first access axis and alternate path axis is 15 °~60 °；
First access is ladder hole, and one end of first access connects the one end of fiber duct (3), and the fiber is led
The other end of pipe (3) is fixedly connected with one end of gland pipe (2), and the other end of the gland pipe (2) stretches out the heat block (1)；
The gland pipe (2), which is connected through a screw thread heat block (1), fixes position of the fiber duct (3) in heat block；It is described
The other end of first access is fixedly connected with spray head (6)；
The alternate path is stepped hole, and one end of the alternate path is connected to first access；Trunnion (4), heat-dissipating pipe
(5), silk material guiding pipe fitting (8) is sequentially connected, the end of the trunnion (4) and the fixed company of the other end of the alternate path
It connects；
The end of the spray head (6) is provided with cone tank, and the cavity that the cone tank and the first access inner wall surround is as molten
Pond；Polyfluortetraethylene pipe (9) is inserted into the trunnion (4), the polytetrafluoro from silk material guiding pipe fitting (8), heat-dissipating pipe (5)
Ethylene tube (9) is for importing thermoplastic material in the molten bath；Continuous fiber reinforcement pass sequentially through the gland pipe (2),
Fiber duct (3) flows into the molten bath；
The intersection point of the first access axis and alternate path axis is located in the molten bath as molten accumulation, the molten accumulation；
The molten accumulation position meets following proportionate relationships:
D1:d2:d3=1:1:0.45,
Wherein, the d1 intersection point that be the molten accumulation intersect vertically to heat block (1) surface and gland pipe (2) axis away from
From, d2 be the molten accumulation to heat block (1) surface at a distance from the intersection point that the trunnion (4) axis intersects vertically, d3 is institute
Molten accumulation is stated to heat block (1) surface at a distance from the intersection point that the spray head (6) axis intersects vertically；
The internal diameter of the gland pipe (2) is greater than the internal diameter of the fiber duct (3), and the internal diameter of the alternate path is greater than the fibre
Tie up the internal diameter of conduit (3)；The internal diameter that the spray head (6) connect one end with first access is greater than the interior of the alternate path
Diameter；
The outer wall phosphoric acid of the heat block (1) is handled；The outer wall of the heat block (1) is enclosed with for heat-insulated airsetting
Glue wrapping layer (7), the material of the aeroge wrapping layer (7) are that oxidization fiber enhances SiO2Aeroge, the aeroge wrapping layer
(7) value range of thickness is 1~5mm；
Be fixed with polyimides heat insulating mattress (10) on the end face of the heat block (1) installation gland pipe (2), the polyimides every
Heat pad (10) is provided with central through hole, and the gland pipe (2) passes through described in polyimides heat insulating mattress (10) central through hole insertion
Heat block (1)；Heating rod 11 and multiple temperature for heating to the heat block (1) is provided in the heat block (1) to pass
Sensor.
2. the in-orbit binary channel 3D printing head based on aeroge wrapping layer used of one kind according to claim 1, special
Sign is, the gland pipe (2) is to be provided with externally threaded stainless steel cylindrical structure, the gland pipe (2) pass through polyimides every
Heat pad (10) is inserted into heat block (1), and the fiber duct (3) is titanium alloy tubule.
3. the in-orbit binary channel 3D printing head based on aeroge wrapping layer used of one kind according to claim 1, special
Sign is, the free end of silk material guiding pipe fitting (8) is horn mouth, the value range of the horn mouth cone angle is 30~
90°。
4. the in-orbit binary channel 3D printing based on aeroge wrapping layer used of one kind described according to claim 1~one of 3
Head, it is characterised in that: the material of the heat block (1) is aluminium alloy.
5. the in-orbit binary channel 3D printing head based on aeroge wrapping layer used of one kind according to claim 4, special
Sign is: the angle theta value between the first access axis and alternate path axis is 45 °.
6. the in-orbit binary channel 3D printing head based on aeroge wrapping layer used of one kind according to claim 5, special
Sign is: the heat-dissipating pipe (5) is circumferentially provided with radiation tooth.
7. the in-orbit binary channel 3D printing head based on aeroge wrapping layer used of one kind according to claim 6, special
Sign is: the polyfluortetraethylene pipe (9) is hollow plastic tube.
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| CN110239095B (en) | 2024-05-03 |
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