CN106863772A - Double shower nozzle 3D printing system and method for thermoplastic resin base continuous fibers prepreg - Google Patents
Double shower nozzle 3D printing system and method for thermoplastic resin base continuous fibers prepreg Download PDFInfo
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- CN106863772A CN106863772A CN201710106059.2A CN201710106059A CN106863772A CN 106863772 A CN106863772 A CN 106863772A CN 201710106059 A CN201710106059 A CN 201710106059A CN 106863772 A CN106863772 A CN 106863772A
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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
- B33Y10/00—Processes of additive manufacturing
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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
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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
- 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
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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
- B33Y70/00—Materials specially adapted for additive manufacturing
Abstract
The present invention proposes a kind of double shower nozzle 3D printing system and method for thermoplastic resin base continuous fibers prepreg, wherein double shower nozzles are thermoplastic resin base continuous fibers prepreg printing head and thermoplasticity pure resin printing head, the printing head of thermoplastic resin-based continuity fiber prepreg material has the function of thermoplastic resin base continuous fibers prepreg feed, guiding, cutting, heating and printing compacting, and all of function can be by G code control.This method is to do optimization design according to real load situation by the structural member to be printed, then the 3D printing of thermoplastic resin base continuous fibers prepreg is carried out according to mechanics optimization structure, the structural member of printing can make thermoplastic resin base continuous fibers reach the utilization rate of maximum, the use of raw material is reduced, processing cost is reduced；And the design of double shower nozzles can realize the printing with cantilever structural member, wherein cantilever design part can print support using thermoplasticity pure resin printing head.
Description
Technical field
The invention mainly relates to composite 3D printing technique field, a kind of thermoplastic resin base continuous fibers of specific design
Double shower nozzle 3D printing system and method for prepreg.
Background technology
3D printing is one kind of rapid shaping mode, and principle is in two dimension, so by three-dimensional model by dimensionality reduction of cutting into slices
The structure of three-dimensional is successively printed afterwards.This moulding process of 3D printing, is to be different from the increasing material manufacturing that tradition subtracts material processing
Method, not only reduces the waste of raw material, also reduces the difficulty of processing of complex structural member.
Present 3D printing technique is in addition to metal 3D printing, and the structural member mechanics that other 3D printing techniques are printed is strong
Degree is inadequate, can only be used as handicraft or displaying model, it is impossible to used directly as load-carrying construction.The main cause of low intensity is existing
There are nonmetallic 3D printing the material mostly relatively low resin of intensity, such as ABS, PLA.
Carbon fiber, glass fibre have the advantages that high intensity, high-modulus, are the reinforcements commonly used in composite.At present,
The most frequently used reinforcing material is fiber dust, chopped strand reinforced resin in 3D printing, is had necessarily compared with pure resin printout intensity
The raising of degree, but still load-carrying construction part use requirement can not be met.Therefore, many scientific research institutions proceed by continuous fiber 3D
The research work of printing.The A of Chinese patent CN 104441658 have invented a kind of continuous lod intelligent composite 3D printing
Head, is that fiber precursor and thermoplastic resin consumptive material are presoaked at printhead, the structural member that this mode is printed
Bending strength has reached 335MPa, has exceeded the bending strength of pure resin printout, but due to presoaking the time in print procedure
Short and molten resin pressure is not enough, resin is not sufficiently impregnated with fiber, could not form good combination interface, the enhancing of fiber
Effect is not not fully exerted.
The content of the invention
The present invention be directed to existing nonmetallic 3D printing structural member mechanical property is not high and continuous fiber 3D printing method
Not a kind of the problems such as not giving full play to continuous lod performance, it is proposed that double sprays of thermoplastic resin base continuous fibers prepreg
Head 3D printing system and method.Most significant advantage is that customizable, 3D printing is by one-dimensional from moulding process for 3D printing
Line root root adhesion be combined into face, be then layering and constituted the process of 3D solid by the face of two dimension, so in print procedure
Each root timber material we it can be made to fully play effect.We can carry out mechanical property to structural member before print procedure
Topology optimization design, meet actual loading with minimum material, reduce the use of continuous fiber, improving the intensity of printout
While reduces cost, the design of the double shower nozzles of 3D printing can also realize that the continuous fiber of cantilever design is printed.
To achieve the above objectives, the present invention proposes following technical scheme：
A kind of double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg, its printing head is double sprinkler designs,
Described double shower nozzles are arranged on common FDM type 3D printers and realize x, y, z three-axis moving；Including thermoplastic resin-based continuous
Fiber prepreg material 3D printing shower nozzle and thermoplasticity pure resin 3D printing shower nozzle；The thermoplastic resin base continuous fibers prepreg 3D
Printing head includes thermoplastic resin base continuous fibers prepreg, the continuous fiber prepreg feed of downward drive force is provided for it
Roller, the metal guide pipe being arranged at below continuous fiber prepreg feed roller, it is arranged at being cut to the heart between metal guide pipe
Mechanism, the fin for being wrapped in metal guiding tube outer surface, being arranged at fin lower section makes the first of thermoplastic resin melting to add
Hot block and the compacting fillet of metal guide pipe bottom；The thermoplasticity pure resin 3D printing shower nozzle includes thermoplasticity pure resin
Consumptive material, the thermoplasticity pure resin feed roller that downward drive force is provided for it, the fin for preventing the upward accumulation of molten resin, reduction
The Teflon trunnion of friction, thermoplasticity pure resin is set to be heated the second heat block and nozzle in molten state.
The thermoplastic resin base continuous fibers prepreg is that circular diameter contains continuous fiber less than 1mm for section
Continuous fibers wire long filament, continuous lod body is evenly distributed in thermoplastic resin matrix, with degree of impregnation higher, greatly
The mechanical strength of nonmetallic 3D printing is improved greatly.
The continuous fiber is carbon fiber, glass fibre or Kafra fiber；The thermoplastic resin be ABS, PLA or
PEEK。
The continuous fiber prepreg feed roller includes two rollers, and a surface is teeth shape, increases the frictional force of wire feed,
Another is the smooth U-shaped roller in surface, it is ensured that thermoplastic resin base continuous fibers prepreg when printing head is entered in
Property.
It is described that heart shearing mechanism is made up of the power source that carbide chip and torque are big and acceleration-deceleration is fast, it is necessary to fast
Speed cuts thermoplastic resin base continuous fibers prepreg, it is ensured that the print procedure of thermoplastic resin base continuous fibers prepreg is continuous
Property.
First heat block and the second heat block are made thermoplastic resin-based using electrically heated rod, ceramics or Electromagnetic Heating
Thermoplastic resin in continuous fiber prepreg is heated and reaches molten state.
The compacting fillet must be smooth, and fillet is greater than the diameter of thermoplastic resin base continuous fibers prepreg, in order to avoid
Frictioning phenomenon is produced in print procedure.
The internal diameter of the metal guide pipe is with thermoplastic resin base continuous fibers prepreg for gap coordinates, it is ensured that thermoplasticity
Resin base continuous fibers prepreg can not produce excessive bending in metal guide pipe, in case continuous fiber is produced in bringing-up section
Block.
A kind of double shower nozzle 3D printing methods of thermoplastic resin base continuous fibers prepreg, comprise the following steps：
The real load situation of S301, analytical structure part；
S302, structural member is carried out according to the mechanical property of real load situation and thermoplastic resin base continuous fibers prepreg
Topology optimization design；
S303, determine optimal printing type according to Optimum Design Results；
S304, according to optimal printing type determine control G code；
S305, execution control G code, complete the 3D printing of the thermoplastic resin base continuous fibers prepreg of structural member.
The load of the step S301 is obtained according to simulation analysis or measurement.
The mechanical property of the thermoplastic resin base continuous fibers prepreg of the step S302 is anisotropy, i.e., vertically
Mechanical property much larger than radial direction mechanical property, therefore, it is necessary to allow loading direction and thermoplastic resin base continuous fibers prepreg
Print direction overlaps, and thermoplastic resin base continuous fibers prepreg is axially born the load of maximum.
The topology optimization design of the step S302 should maximize the continuity of holding structure part, to ensure thermoplastic resin
The integraty of continuity and print structure in base continuous fibers prepreg print procedure, improves print speed, increases structural member
Mechanical strength.
The optimal printing type of the step S303 is that the printing path of thermoplastic resin base continuous fibers prepreg is optimal
And least number of times is cut, and because thermoplastic resin base continuous fibers prepreg is anisotropic material, i.e. its mechanics vertically
Performance is much larger than the mechanical property of radial direction, therefore, thermoplastic resin base continuous fibers prepreg will be printed along the direction of load
The axial direction of thermoplastic resin base continuous fibers prepreg is born the load of maximum, and to the greatest extent may be used at the inside of print structure body
The cutting number of times of continuous fiber can be reduced, it is ensured that the continuity of printing and the integraty of print structure.
The control G code of the step S304 includes that shower nozzle moves G code, by thermoplastic resin base continuous fibers prepreg
Printing path G code and thermoplasticity pure resin 3D printing nozzle printing support section mobile G code composition；Continuous fiber
Prepreg feed roller feed G code, the speed of its feed is identical with shower nozzle translational speed, it is ensured that continuous fiber normal print；Heat
Plasticity pure resin feed roller feed G code, be with cantilever structural member addition support section, described support strength it is not high and
It is easy to remove；Continuous fiber prepreg shower nozzle heating-up temperature G code；Thermoplasticity pure resin printhead heating-up temperature G code；Continuously
The cutting action G code of fiber prepreg material, it is ensured that continuous fiber prepreg printing path can be fast when producing compared with big change angle
Speed cuts continuous fiber.
Compared with prior art, the present invention has the advantage that：
A kind of double shower nozzle 3D printing system and method for thermoplastic resin base continuous fibers prepreg proposed by the present invention, can not only
The printing intensity of structural member is enough improved, and can be saved material by the usage amount of optimization design reduction continuous fiber, dropped
The quality of low structural member；In addition the 3D printing of the continuous fiber with cantilever design is realized in the design of double shower nozzles.
Brief description of the drawings
Fig. 1 is double shower nozzle 3D printing system structure diagrams of thermoplastic resin base continuous fibers prepreg.
Fig. 2 is thermoplastic resin base continuous fibers prepreg sectional view radially and axially.
Fig. 3 is double shower nozzle 3D printing method flow diagrams of thermoplastic resin base continuous fibers prepreg.
Fig. 4 is thermoplastic resin base continuous fibers prepreg 3D printing control routine.
Fig. 5 is the test sample with cantilever design in embodiment.
Specific embodiment
In order that the advantage of invention becomes apparent from, clearly, the embodiment that develops simultaneously referring to the drawings is done further to the present invention
Detailed description.
As shown in figure 1, a kind of double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg, its printing head
It is double sprinkler designs, described double shower nozzles are arranged on common FDM type 3D printers and realize x, y, z three-axis moving；Including heat
Plastic resin base continuous fibers prepreg 3D printing shower nozzle 401 and thermoplasticity pure resin 3D printing shower nozzle 402；The thermoplastic resin
Aliphatic radical continuous fiber prepreg 3D printing shower nozzle 401 includes thermoplastic resin base continuous fibers prepreg 101, is provided downwards for it
The continuous fiber prepreg feed roller 102 of driving force, the metal guide pipe for being arranged at the lower section of continuous fiber prepreg feed roller 102
103rd, be arranged between metal guide pipe 103 to heart shearing mechanism 104, be wrapped in the radiating of the outer surface of metal guide pipe 103
Piece 105, is arranged under the lower section of fin 105 makes the first heat block 106 that thermoplastic resin melts and metal guide pipe 103 most
The compacting fillet 107 at end；The thermoplasticity pure resin 3D printing shower nozzle 402 includes thermoplasticity pure resin consumptive material 109, is provided for it
The thermoplasticity pure resin feed roller 110 of downward drive force, the fin 105 for preventing the upward accumulation of molten resin, reduction rub
Teflon trunnion 111, thermoplasticity pure resin is set to be heated the second heat block 112 and nozzle 113 in molten state.
The thermoplastic resin base continuous fibers prepreg 101 for section be circular diameter less than 1mm containing continuous
The continuous fibers wire long filament of fiber 201, the reinforcement of continuous fiber 201 is evenly distributed in the matrix of thermoplastic resin 202, with compared with
Degree of impregnation high, can greatly improve the mechanical strength of nonmetallic 3D printing, as shown in Figure 2.
The continuous fiber 201 is carbon fiber, glass fibre or Kafra fiber；The thermoplastic resin 202 be ABS,
PLA or PEEK.
The continuous fiber prepreg feed roller 102 includes two rollers, and a surface is teeth shape, increases the friction of wire feed
Power, another is the smooth U-shaped roller in surface, it is ensured that thermoplastic resin base continuous fibers prepreg 101 is when printing head is entered
Centering.
It is described that heart shearing mechanism 104 is made up of the power source that carbide chip and torque are big and acceleration-deceleration is fast, must
Thermoplastic resin base continuous fibers prepreg 101 must rapidly be cut, it is ensured that thermoplastic resin base continuous fibers prepreg 101 is beaten
Print process continuity.
First heat block, 106 and second heat block 112 makes thermoplasticity using electrically heated rod, ceramics or Electromagnetic Heating
Thermoplastic resin 202 in resin base continuous fibers prepreg 101 is heated and reaches molten state.
The compacting fillet 107 must be smooth, and fillet is greater than the straight of thermoplastic resin base continuous fibers prepreg 101
Footpath, in order to avoid frictioning phenomenon is produced in print procedure.
The internal diameter of the metal guide pipe 103 is with thermoplastic resin base continuous fibers prepreg 101 for gap coordinates, it is ensured that
Thermoplastic resin base continuous fibers prepreg 101 can not produce excessive bending in metal guide pipe 103, in order to avoid continuous fiber
201 produce blocking in bringing-up section.
As shown in figure 3, a kind of double shower nozzle 3D printing methods of thermoplastic resin base continuous fibers prepreg, including following step
Suddenly：
The real load situation of S301, analytical structure part；
S302, according to the mechanical property of real load situation and thermoplastic resin base continuous fibers prepreg 101 to structural member
Carry out topology optimization design；
S303, determine optimal printing type according to Optimum Design Results；
S304, according to optimal printing type determine control G code；
S305, execution control G code, complete the 3D printing of the thermoplastic resin base continuous fibers prepreg of structural member.
The load of the step S301 is obtained according to simulation analysis or measurement；
The mechanical property of the thermoplastic resin base continuous fibers prepreg 101 of the step S302 is anisotropy, i.e., vertically
Mechanical property much larger than radial direction mechanical property, therefore, it is necessary to allow loading direction and thermoplastic resin base continuous fibers prepreg
101 Print directions overlap, and thermoplastic resin base continuous fibers prepreg 101 axially bears the load of maximum；
The topology optimization design of the step S302 should maximize the continuity of holding structure part, to ensure thermoplastic resin-based company
Continuity in the continuous print procedure of fiber prepreg material 101, improves print speed, increases the mechanical strength of structural member；
The optimal printing type of the step S303 be thermoplastic resin base continuous fibers prepreg 101 optimal printing path with
And at least cut number of times, and because thermoplastic resin base continuous fibers prepreg 101 is anisotropic material, i.e. its mechanics vertically
Performance is much larger than the mechanical property of radial direction, therefore, can by optimal printing path thermoplastic resin base continuous fibers prepreg 101
Direction printing along load makes the axial direction of thermoplastic resin base continuous fibers prepreg 101 bear the load of maximum, at least cuts
Short number of times can ensure the continuity of printing and the integraty of print structure, improve the mechanical property of print structure part；
As shown in figure 4, the control G code of the step S304 includes that shower nozzle moves G code, by thermoplastic resin base continuous fibers
The printing path G code and thermoplasticity pure resin 3D printing shower nozzle 402 of prepreg 101 print the mobile G code of support section
Composition；The feed G code of continuous fiber prepreg feed roller 102, the speed of its feed is identical with shower nozzle translational speed, it is ensured that continuous
Fiber normal print；The feed G code of thermoplasticity pure resin feed roller 110, is the structural member addition support section with cantilever, institute
The support strength stated is not high and is easy to be removed after the completion of printing；Continuous fiber prepreg shower nozzle heating-up temperature G code；Thermoplasticity is pure
Resin print head heating-up temperature G code；The cutting action G code of continuous fiber prepreg, it is ensured that continuous fiber prepreg is printed
Path can rapidly cut continuous fiber when producing compared with big change angle.
Printing one has the test sample of cantilever design, as shown in Figure 5.
S1. the load condition of analytical structure part, including load type, magnitude of load and direction.
S2. real load situation and the mechanical property of continuous fiber prepreg according to structural member is opened up to structural member
Optimization design is flutterred, makes structural member on the premise of load requirements are met, made continuous fiber utilization rate maximum and to ensure whole knot
The integraty of component.It is printout planform 501 by topological optimization out by taking Fig. 5 as an example, this structural member is due to printing
Need with cantilever design 502.
S3. according to the shape and size of topological optimization out structural member 501, the base continuous fibers preimpregnation of design thermoplastic resin
The Print direction of material, makes the axial direction of continuous fiber consistent with the loading direction of structural member；In design continuous fiber print procedure
Position is cut, the cutting number of times inside continuous fiber is reduced, it is ensured that inside the continuity and structural member 501 of continuous fiber printing
Integraty.
The optimal Print direction of the thermoplastic resin base continuous fibers prepreg for S4. being obtained according to S3 and cutting position,
The actuation time of shower nozzle mobile route G code and shearing mechanism is cooked up, it is determined that cutting short G code active position；According to thermoplasticity
The melt temperature of resin draws the print temperature G code of thermoplastic resin base continuous fibers prepreg printing head, feed roller
Feed G code, including the mobile G code for printing, the heating-up temperature G code of thermoplasticity pure resin, feed G code.
S5. thermoplastic resin base continuous fibers prepreg is loaded into continuous fiber prepreg printing head, makes continuous fiber
Prepreg stretches out compacting fillet 5mm or so；Thermoplasticity pure resin consumptive material is loaded into thermoplasticity pure resin printing head, it is possible to from
Nozzle extruded thermoplastic pure resin silk material.
S6. control routine is performed, after two heating-up temperatures of double shower nozzles reach respective target temperature, double shower nozzles are moved to
Printing beginning proceeds by the printing of thermoplastic resin base continuous fibers prepreg, with the mobile thermoplastic resin of printing head
Base continuous fibers prepreg feed roller starts rotational conveyance continuous fiber prepreg along guide pipe, initially enters shearing mechanism portion
Point, now shearing mechanism does not have control signal to trigger, and continuous fiber prepreg keeps solid-state sequential like to enter heating part；Adding
Hot part, molten state is changed into because the thermoplastic resin in thermoplastic resin base continuous fibers prepreg is heated；Then it is subject to upper
The extruding of the Solid thermoplastic's resin base continuous fibers prepreg in the guide pipe of end and lower end have been sticked on type plate
The drawing of continuous fiber prepreg, printing base plate or printed part are sticked under the pressure effect of compacting fillet
On.
S7. when shearing mechanism receives cutting signal, it is pre- that its shearing mechanism will in advance trigger cutting solid-state continuous fiber
Leaching material, is exactly just S4 designs when the continuous fiber prepreg cut sticks to printing base plate or printed part
The position of good cutting.
S8. when exist support need printing when, thermoplasticity pure resin printing head start print 502 thermoplasticity pure resin portions
Point, until thickness reaches the printing thickness of continuous fiber prepreg（Because the thermoplastic resin base continuous fibers of 501 parts are presoaked
Pure resin printing thickness of the thickness of material more than 502 parts）.
S9. the printing of the next layer of printing of continuous fiber prepreg, cutting and the support of thermoplasticity pure resin is repeated, until
The printing of total part is finished, and now can manually remove pure resin printing support, and what is obtained is thermoplastic resin-based continuous
The structural member of fiber prepreg material printing.
Double shower nozzle 3D printing system and method for thermoplastic resin base continuous fibers prepreg proposed by the present invention, due to making
With preimpregnation degree continuous fiber prepreg high as major print raw material, the printing intensity of structural member can be significantly improved；
Before the printing according to real load situation to printing structural member carry out topological optimization, can meet it is actually used in the case of
The usage amount of continuous fiber is reduced, is saved material, reduce the quality of total part；And the design of double shower nozzles is capable of achieving to hang
The continuous fiber 3D printing of arm configuration.
Claims (10)
1. a kind of double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg, its printing head is that double shower nozzles set
Meter, described double shower nozzles are arranged on common FDM type 3D printers and realize x, y, z three-axis moving；It is characterised in that it includes hot
Plastic resin base continuous fibers prepreg 3D printing shower nozzle（401）With thermoplasticity pure resin 3D printing shower nozzle（402）；The thermoplastic
Property resin base continuous fibers prepreg 3D printing shower nozzle（401）Including thermoplastic resin base continuous fibers prepreg（101）, be it
The continuous fiber prepreg feed roller of downward drive force is provided（102）, be arranged at continuous fiber prepreg feed roller（102）Lower section
Metal guide pipe（103）, be arranged at metal guide pipe（103）Between to heart shearing mechanism（104）, be wrapped in metal guiding
Pipe（103）The fin of outer surface（105）, it is arranged at fin（105）Lower section makes the first heat block that thermoplastic resin is melted
（106）And metal guide pipe（103）The compacting fillet of bottom（107）；The thermoplasticity pure resin 3D printing shower nozzle（402）
Including thermoplasticity pure resin consumptive material（109）, the thermoplasticity pure resin feed roller of downward drive force is provided for it（110）, prevent from melting
The fin that melt resin is piled up upwards（105）, reduce friction Teflon trunnion（111）, thermoplasticity pure resin is heated in molten
Melt the second heat block of state（112）And nozzle（113）.
2. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, the thermoplastic resin base continuous fibers prepreg（101）For section is that circular diameter contains continuous fibre less than 1mm
Dimension（201）Continuous fibers wire long filament, continuous fiber（201）Reinforcement is in thermoplastic resin（202）It is evenly distributed in matrix, is had
There is degree of impregnation higher, greatly improve the mechanical strength of nonmetallic 3D printing.
3. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 2, its feature
It is, the continuous fiber（201）It is carbon fiber, glass fibre or Kafra fiber；The thermoplastic resin（202）For ABS,
PLA or PEEK.
4. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, the continuous fiber prepreg feed roller（102）Including two rollers, a surface is teeth shape, increases the friction of wire feed
Power, another is the smooth U-shaped roller in surface, it is ensured that thermoplastic resin base continuous fibers prepreg（101）Entering printing head
When centering.
5. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, it is described to heart shearing mechanism（104）It is made up of the power source that carbide chip and torque are big and acceleration-deceleration is fast, it is necessary to
It is rapid to cut thermoplastic resin base continuous fibers prepreg（101）, it is ensured that thermoplastic resin base continuous fibers prepreg（101）'s
Print procedure continuity.
6. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, first heat block（106）With the second heat block（112）Using electrically heated rod, ceramics or Electromagnetic Heating, make thermoplasticity
Resin base continuous fibers prepreg（101）In thermoplastic resin（202）It is heated and reaches molten state.
7. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, the compacting fillet（107）Must be smooth, fillet is greater than thermoplastic resin base continuous fibers prepreg（101）It is straight
Footpath, in order to avoid frictioning phenomenon is produced in print procedure.
8. double shower nozzle 3D printing systems of thermoplastic resin base continuous fibers prepreg according to claim 1, its feature
It is, the metal guide pipe（103）Internal diameter and thermoplastic resin base continuous fibers prepreg（101）For gap coordinates, protect
Card thermoplastic resin base continuous fibers prepreg（101）In metal guide pipe（103）It is interior to produce excessive bending, Yi Mianlian
Continuous fiber（201）Blocking is produced in bringing-up section.
9. a kind of double shower nozzle 3D printing methods of thermoplastic resin base continuous fibers prepreg, it is characterised in that including following step
Suddenly：
The real load situation of S301, analytical structure part；
S302, according to real load situation and thermoplastic resin base continuous fibers prepreg（101）Mechanical property to structure
Part carries out topology optimization design；
S303, determine optimal printing type according to Optimum Design Results；
S304, according to optimal printing type determine control G code；
S305, execution control G code, complete the 3D printing of the thermoplastic resin base continuous fibers prepreg of structural member.
10. double shower nozzle 3D printing methods of thermoplastic resin base continuous fibers prepreg according to claim 9, its feature
It is that the load of the step S301 is obtained according to simulation analysis or measurement；
The thermoplastic resin base continuous fibers prepreg of the step S302（101）Mechanical property be anisotropy, i.e., along axle
Mechanical property is much larger than the mechanical property of radial direction, therefore, it is necessary to allow loading direction to be presoaked with thermoplastic resin base continuous fibers
Material（101）Print direction overlaps, and makes thermoplastic resin base continuous fibers prepreg（101）Axially bear the load of maximum；
The topology optimization design of the step S302 should maximize the continuity of holding structure part, to ensure thermoplastic resin-based company
Continuous fiber prepreg material（101）Continuity in print procedure, improves print speed, increases the mechanical strength of structural member；
The optimal printing type of the step S303 is thermoplastic resin base continuous fibers prepreg（101）Printing path and
Number of times is cut, due to thermoplastic resin base continuous fibers prepreg（101）Be anisotropic material, i.e. its mechanical property vertically
Much larger than the mechanical property of radial direction, therefore, thermoplastic resin base continuous fibers prepreg（101）To be printed along the direction of load
Make thermoplastic resin base continuous fibers prepreg（101）Axial direction bear the load of maximum, and in the inside of print structure body
When reduce continuous fiber（201）Cutting number of times, reduce processing difficulty, it is ensured that the integraty of structure；
The control G code of the step S304 includes that shower nozzle moves code, by thermoplastic resin base continuous fibers prepreg（101）
Printing path code and thermoplasticity pure resin 3D printing shower nozzle（402）Print the mobile code composition of support section；Continuously
Fiber prepreg material feed roller（102）Feed code, the speed of its feed is identical with shower nozzle translational speed, it is ensured that continuous fiber is normal
Printing；Thermoplasticity pure resin feed roller（110）Feed code, is the structural member addition support section with cantilever, described branch
Support intensity is not high and is easy to remove；Continuous fiber prepreg shower nozzle heating-up temperature code；Thermoplasticity pure resin printhead heating temperature
Degree code；The cutting action code of continuous fiber prepreg, it is ensured that continuous fiber prepreg printing path is produced compared with big change angle
Continuous fiber can be rapidly cut when spending.
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Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107379539A (en) * | 2017-08-14 | 2017-11-24 | 上海宇航系统工程研究所 | A kind of continuous fiber prepreg 3D printing shower nozzle and its 3D printer, Method of printing |
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