CN107856295B - 3D printer - Google Patents
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- CN107856295B CN107856295B CN201711404288.9A CN201711404288A CN107856295B CN 107856295 B CN107856295 B CN 107856295B CN 201711404288 A CN201711404288 A CN 201711404288A CN 107856295 B CN107856295 B CN 107856295B
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- 230000007246 mechanism Effects 0.000 claims abstract description 209
- 239000000835 fiber Substances 0.000 claims abstract description 195
- 238000007639 printing Methods 0.000 claims abstract description 139
- 230000033001 locomotion Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims description 40
- 238000001125 extrusion Methods 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 20
- 239000012768 molten material Substances 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010146 3D printing Methods 0.000 description 7
- 238000012681 fiber drawing Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033764 rhythmic process Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005594 polymer fiber Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The invention relates to a 3D printer, which is characterized in that a long fiber traction mechanism which does not need to consume electric energy is arranged on a printing platform, so that the long fiber traction mechanism directly utilizes the motion of the printing platform to generate tension on continuous long fibers, and the continuous long fibers can be pulled, so that continuous traction on the continuous long fibers can be kept in the printing process without being applied to a conveying motor, the phenomenon that the conveying motor cannot print normally when in fault can be avoided, the energy consumption can be saved, and the manufacturing cost can be reduced.
Description
Technical Field
The invention relates to 3D printing equipment, in particular to a continuous long fiber composite melting and stacking 3D printer.
Background
The 3D printing is a widely applied rapid prototyping technology at present, can be free from the limitation of the complexity of the shape of the part, and can rapidly complete the rapid printing of three-dimensional solid objects with various shapes without any tooling die. The variety of 3D printers is varied, and there is a continuous filament composite melt-deposited 3D printer, which includes a base, a printing platform, and a composite extrusion device. The printing platform and the composite extrusion device are sequentially arranged on the base from top to bottom. Wherein the composite extrusion device is provided with an extrusion mechanism for extruding the molten printing material to the printing nozzle and a conveying mechanism for inputting the continuous long fiber to the printing nozzle to be composited with the molten printing material. When 3D printing is carried out, the printing material is added from a feed hopper of the composite extrusion device and then enters a machine barrel for heating, a basic motor of the extrusion mechanism drives a screw rod, and the screw rod rotates to convey the printing material to a printing nozzle; meanwhile, the continuous long fibers are driven by a conveying motor of the conveying mechanism to be brought into the printing nozzles, so that the continuous long fibers are compositely immersed by the printing material and flow out of the printing nozzles together to be sent to the printing platform, and 3D printing is realized.
However, the existing 3D printer with continuous filament composite melt-stacking requires a whole set of manufacturing, which requires a long time and high cost, and the effective utilization rate of the equipment cannot be improved due to the limitation of the equipment function. And, the output of this continuous long fiber of 3D printer need utilize to the conveying motor just can realize carrying, just can not normally print when conveying motor trouble, and consume the energy.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention provides the 3D printer, and the long fiber traction mechanism which does not need to consume electric energy is arranged on the printing platform, so that the long fiber traction mechanism directly utilizes the motion of the printing platform to generate tension to the continuous long fiber, and the continuous long fiber can be pulled, so that the continuous long fiber can be continuously pulled in the printing process without being applied to a conveying motor, the phenomenon that the continuous long fiber cannot be normally printed when the conveying motor fails can be avoided, the energy consumption can be saved, and the manufacturing cost can be reduced.
A3D printer comprises a melting stock feeding mechanism, a printing nozzle, a printing platform, a platform travelling mechanism, a long fiber feeding mechanism, a long fiber traction mechanism, a control mechanism and a power supply mechanism; the melt feeding mechanism comprises a feeding mechanism and an extrusion feeding mechanism; the printing nozzle is communicated with the extrusion port of the extrusion feeding mechanism, and the nozzle faces the printing platform; the platform travelling mechanism is in driving connection with the printing platform and can drive the printing platform to run in a three-dimensional direction; the long fiber feeding mechanism comprises a long fiber conveying pipe and a long fiber conveying roller; one end of the long fiber conveying pipe axially penetrates through the printing nozzle, extends into the printing nozzle and is just over against the nozzle of the printing nozzle, a space between the end face of the long fiber conveying pipe and the inner end face of the nozzle of the printing nozzle forms a wrapping composite space wrapped by an inner cavity of the printing nozzle, and the other end of the long fiber conveying pipe is exposed above the printing nozzle; the long fiber conveying roller is arranged above one exposed end of the long fiber conveying pipe, and a tangent line of the output side of the long fiber conveying roller is collinear with the axis of the long fiber conveying pipe; the long fiber traction mechanism is arranged on the printing platform and is used for fixing a composite material formed by wrapping continuous long fibers by molten materials and output from the printing nozzle so as to continuously traction the continuous long fibers through the movement of the printing platform in the printing process; the control mechanism is electrically connected with the molten material feeding mechanism and the platform travelling mechanism; the power supply mechanism supplies power for the control mechanism, the melt feeding mechanism and the platform travelling mechanism.
Compared with the prior art, the 3D printer has the advantages that the long fiber traction mechanism which does not consume electric energy is arranged on the printing platform, so that the long fiber traction mechanism directly utilizes the motion of the printing platform to generate tension on the continuous long fiber, and the continuous long fiber can be pulled, so that continuous traction on the continuous long fiber can be kept in the printing process without being applied to a conveying motor, the phenomenon that the conveying motor cannot print normally when in fault can be avoided, energy consumption can be saved, and manufacturing cost is reduced.
Further, the long fiber traction mechanism is a crack or a groove formed by partially hollowing out the top surface of the printing platform; or the long fiber traction mechanism is a nail or a clip or a column and is used for fixing the composite material flowing out to the printing platform on the printing platform. Through limiting here, directly utilize crack or recess as long fiber traction mechanism, hold just the compound material of output, and can realize the fixed to compound material after compound material is stewed the shaping, not only be favorable to simplifying long fiber traction mechanism's structure, reduce 3D printer's manufacturing cost, but also can guarantee the fixed to compound material.
Further, the slit or the groove comprises a plurality of layers of fixing spaces which are sequentially arranged along the height direction of the printing platform and are mutually communicated; the volumes of every two adjacent layers of fixed spaces are different. By the definition, the multi-layer fixing space is beneficial to reinforcing the composite material, so that the stability of the long fiber traction mechanism for traction of the continuous long fiber is enhanced.
Further, as another structure of the long fiber traction mechanism, the long fiber traction mechanism comprises a long fiber fixing body arranged at one side of the top surface of the printing platform; the peripheral wall surface of the long fiber fixing body extends outwards to form a multi-layer clamping plate; the space between every two adjacent clamping plates forms a fixing space for clamping the composite material. By limiting the invention, the composite material is fixed by utilizing a plurality of fixing spaces formed by the multi-layer clamping plates, so that the traction force of the long fiber traction mechanism on the continuous long fiber is better enhanced, and the stability of the 3D printer for carrying out 3D printing on the continuous long fiber composite melting accumulation can be further improved.
Further, the multilayer splint is from top to bottom set gradually along print platform's direction of height, and the opening has been seted up to the one end of every splint, every two adjacent fixed spaces pass through corresponding opening intercommunication. By limiting the structure, the composite material can smoothly flow into each layer of fixed space and is reinforced by each layer of fixed space, so that the traction force of the long fiber traction mechanism on the continuous long fiber is further enhanced, and the smoothness of continuous long fiber output is further ensured.
Further, the openings of every two adjacent clamping plates are staggered; and/or the outer diameter of the multi-layer splint is sequentially increased from top to bottom. By the limitation, the composite material entering the fixing space can be further fixed through the opening, so that the traction force of the long fiber traction mechanism on the continuous long fiber is further enhanced, and the smoothness of continuous long fiber output is further ensured.
Further, as another structure of the positions of the multilayered splints, the multilayered splints are sequentially arranged in the width direction or the length direction of the printing platform.
Further, the 3D printer further comprises a long fiber input motor electrically connected with the control mechanism; a motor shaft of the long fiber input motor is in driving connection with the long fiber conveying roller; when printing starts, the control mechanism controls the long fiber input motor to operate, drives the long fiber conveying roller to rotate and drives the continuous long fiber to be input into the long fiber conveying pipe to be compounded with the molten material in the printing nozzle until the compound material is output from the printing nozzle to the printing platform and is fixed by the long fiber traction mechanism; after the composite material is fixed by the long fiber traction mechanism, the control mechanism controls the long fiber input motor to stop running, and the long fiber traction mechanism continuously pulls the continuous long fiber through the movement of the printing platform. By the limitation, before long fibers are compounded with the molten material, a motor is used for replacing a human hand to rotate the long fiber conveying roller so as to realize that continuous long fibers are fed into a printing nozzle to be compounded with the molten material and output into a long fiber traction mechanism, and the continuous long fibers are fixed by the long fiber traction mechanism, so that convenient long fiber input operation is facilitated, the stability of long fiber input is improved, and the labor load is reduced; after the long fibers are compounded with the molten materials and fixed by the long fiber traction mechanism, the long fiber input motor is not used for conveying the long fibers, and the long fiber traction mechanism is directly utilized for inputting, compounding and outputting the long fibers, so that energy conservation is facilitated, and the output rhythm of the long fibers is more appropriate to the printing rhythm.
Further, the platform walking mechanism comprises an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism;
the Y-axis moving mechanism comprises a base, a Y-axis linear driving mechanism and a Y-axis base; the X-axis moving mechanism comprises an X-axis linear driving mechanism and an X-axis base; the Z-axis moving mechanism comprises a Z-axis linear driving mechanism;
the Y-axis base is arranged on the base in a sliding manner and is in driving connection with the Y-axis linear driving mechanism; the X-axis base is arranged on the Y-axis base in a sliding manner and is in driving connection with the X-axis linear driving mechanism; the Z-axis linear driving mechanism is arranged on the X-axis base and is in driving connection with the printing platform.
By the limitation, the stability of the movement of the printing platform is improved, and the interference to other structures of the invention in the movement process of the printing platform is avoided.
Further, the feeding mechanism and the extrusion feeding mechanism are respectively a feeding mechanism and an extrusion feeding mechanism of a plastic extrusion molding machine. By limiting the invention, the invention is directly improved on the basis of any plastic extrusion molding dual-purpose machine without additionally arranging an extrusion mechanism and a feeding mechanism, thereby effectively reducing the manufacturing difficulty of the continuous long fiber composite fused stacking 3D printer, simplifying the manufacturing process and reducing the cost to a certain extent.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a 3D printer according to the present invention;
FIG. 2 is a schematic cross-sectional view of a 3D printer according to the present invention;
FIG. 3 is a schematic cross-sectional view of a printing nozzle of the 3D printer and a long fiber conveying pipe installed in the printing nozzle;
fig. 4 is a schematic structural diagram of the 3D printer according to the present invention when the platform traveling mechanism drives the printing platform to drive the long fiber traction mechanism to approach the nozzles of the printing nozzles;
fig. 5 is a schematic structural diagram of a printing platform of the 3D printer and a long fiber traction mechanism fixed on the printing platform;
fig. 6 is a schematic structural diagram of a printing platform and a long fiber drawing mechanism fixed on the printing platform in a modified embodiment 1) of the 3D printer of the present invention.
Detailed Description
Referring to fig. 1 to 3, the present invention provides a 3D printer, which includes a melt feeding mechanism 1, a printing nozzle 2, a printing platform 3, a platform traveling mechanism, a long fiber feeding mechanism 5, a long fiber traction mechanism 6, a control mechanism and a power supply mechanism. The melt feeding mechanism 1 comprises a machine table 11, an extrusion feeding mechanism 12 arranged on the top surface of the machine table 11, and a feeding mechanism 13 communicated with a feeding port of the extrusion feeding mechanism 12. The printing nozzle 2 is communicated with an extrusion port of the extrusion feeding mechanism 12, and the nozzle faces the printing platform 3. The platform travelling mechanism is in driving connection with the printing platform 3 and can drive the printing platform 3 to run in a three-dimensional direction. The long fiber feeding mechanism 5 includes a long fiber conveying pipe 51 and a long fiber conveying roller 52; one end of the long fiber conveying pipe 51 penetrates through the printing nozzle 2 along the axial direction, extends into the printing nozzle 2 and is just over against the nozzle 21 suspended above the printing nozzle 2, a space between the end face and the inner end face of the nozzle 21 of the printing nozzle 2 forms a wrapping composite space A wrapped by the inner cavity of the printing nozzle 2, and the other end of the long fiber conveying pipe 51 is exposed above the printing nozzle 2. The long fiber conveying roller 52 is disposed above an exposed end of the long fiber conveying pipe 51, and a tangent line of an output side thereof is collinear with an axis of the long fiber conveying pipe 51. The long fiber drawing mechanism 6 is arranged on the printing platform 3 and is used for fixing the composite material formed by wrapping the continuous long fibers by the molten material output from the printing nozzle 2 so as to continuously draw the continuous long fibers through the movement of the printing platform 3 in the printing process. The control mechanism is electrically connected with the molten material feeding mechanism 1 and the platform travelling mechanism; the power supply mechanism supplies power to the control mechanism, the melt feeding mechanism 1 and the platform travelling mechanism.
Therefore, when 3D printing is needed, the control mechanism controls the feeding mechanism 13, the extrusion feeding mechanism 12 and the platform travelling mechanism to operate. First, the platform travelling mechanism drives the printing platform 3 to operate until the long fiber traction mechanism 6 is driven to be positioned right below the nozzle 21 of the printing nozzle 2 and close to the printing nozzle 2, as shown in fig. 4. Secondly, the feeding mechanism 13 inputs the plastic material into the extrusion feeding mechanism 12, and the extrusion feeding mechanism 12 heats the plastic material to form molten plastic and then extrudes the molten plastic into the printing nozzle 2; at the same time, the continuous filament B is driven to be fed into the filament conveying pipe 51 by manually rotating the filament conveying roller 52. When the continuous long fibers enter the wrapping and compounding space a from the long fiber conveying pipe 51, the molten material in the printing nozzle 2 also just enters the wrapping and compounding space a, and wraps the periphery of the continuous long fibers, thereby forming a composite material. Then, as the extrusion feeding mechanism 12 continues to extrude and the long fiber conveying roller 52 continues to rotate, the continuous long fibers and the molten material which continuously enter the wrapping and compounding space a are mutually fused, a compound material is continuously formed, and the compound material is continuously output to the long fiber drawing mechanism 6 arranged on the printing platform 3. After the molten composite material is subjected to static forming, the composite material is fixed in the long fiber traction mechanism 6 without falling and deforming, at the moment, the long fiber conveying roller 52 can be loosened, the control mechanism can control the running mechanism of the platform to run according to the 3D product to be printed, and drive the printing platform 3 to move, then the long fiber traction mechanism 6 fixed on the printing platform 3 can pull the continuous long fiber in the long fiber conveying pipe 51 by utilizing the movement of the printing platform 3, so that the continuous long fiber continuously passes through the long fiber conveying roller 52 and the long fiber conveying pipe 51 to be compounded with the molten material and output to the printing platform 3, and 3D printing is realized.
The control mechanism controls the feeding mechanism 13, the extrusion feeding mechanism 12 and the platform running mechanism in good time, and the description of the working process of the printer according to the present invention can be obtained by combining the control means of the prior art, so that the description is omitted here.
In this embodiment, the structure of the feeding mechanism 13 is the same as that of the feeding mechanism 13 for plastic materials in the prior art, the structure of the extrusion feeding mechanism 12 is also the same as that of the extrusion feeding mechanism 12 for melting and extruding plastic materials in the prior art, and the structure of the printing nozzle 2 is the same as that of the printing nozzle 2 of the prior art 3D printer, so that details are omitted here.
The feeding mechanism 13 and the extrusion feeding mechanism 12 are respectively a feeding mechanism 13 and an extrusion feeding mechanism 12 of the existing plastic extrusion molding machine, so as to effectively reduce the manufacturing difficulty of the 3D printer for continuous long fiber composite melting and stacking, simplify the manufacturing process of the 3D printer and reduce the cost to a certain extent. For example, the feeding mechanism 13 and the extrusion feeding mechanism 12 of the injection molding machine are used, and at this time, the injection nozzle of the extrusion feeding mechanism 12 of the injection molding machine is replaced by the printing nozzle 2 dedicated to the 3D printer.
In order to simplify the structure of the 3D printer according to the present invention as much as possible, and reduce the manufacturing cost and the use cost while ensuring stable traction of the continuous long fibers, in this embodiment, preferably, referring to fig. 5, the long fiber traction mechanism 6 is a slit or groove formed by partially hollowing out the top surface of the printing platform 3.
In this embodiment, the slit or groove is in a long strip shape. In other variant embodiments, however, the shape of the slit and the groove may not be limited, as the slit or the groove may also be wavy or zigzag or polygonal or circular or annular; and when the shape of the crack or the groove has more bending positions, the crack or the groove has stronger fixity on the composite material arranged in the crack or the groove, thereby having stronger traction on the continuous long fiber.
In order to further strengthen the composite material and further enhance the traction stability of the continuous long fibers by the long fiber traction mechanism 6, as a better technical scheme, the crack or the groove comprises a plurality of layers of fixing spaces which are sequentially arranged along the height direction of the printing platform 3 and are mutually communicated; the volumes of every two adjacent layers of fixed spaces are different. Thus, before the main printing, the melted composite material continuously flows into each layer of fixing space, and after the static forming, each layer of fixing space has a fixing acting force on the formed composite material accommodated by the fixing space.
In this embodiment, referring to fig. 1, the platform walking mechanism includes an X-axis moving mechanism 41, a Y-axis moving mechanism 42, and a Z-axis moving mechanism (not shown). The Y-axis moving mechanism 42 includes a base 421, a Y-axis linear driving mechanism 422, and a Y-axis base 423. The X-axis moving mechanism 41 includes an X-axis linear driving mechanism 411 and an X-axis base 412. The Z-axis moving mechanism comprises a Z-axis linear driving mechanism. The Y-axis base 423 is slidably disposed on the base 421 and is in driving connection with the Y-axis linear driving mechanism 422. The X-axis base 412 is slidably disposed on the Y-axis base 423 and is in driving connection with the X-axis linear driving mechanism 411. The Z-axis linear driving mechanism is disposed on the X-axis base 412 and is in driving connection with the printing platform 3.
The above-mentioned each straight line actuating mechanism is connected with the control mechanism electricity, and each straight line actuating mechanism can be cylinder or hydro-cylinder or electric putter or electric jar or power shaft pass through ball screw and change the motor of rotation motion into rectilinear motion or pass through the motor straight line actuating mechanism of belt conversion of rotation motion rectilinear motion.
The continuous long fibers in the present invention may be carbon fibers, polymer fibers, plant fibers, or metal fibers.
In addition, the invention has other variant embodiments, such as:
1) The structure of the long fiber drawing mechanism 6 is changed, that is, referring to fig. 6, the long fiber drawing mechanism 6' with the changed structure includes a long fiber fixing body 61 provided at one side of the top surface of the printing platform 3. The outer peripheral wall surface of the long fiber fixing body 61 extends outward to form a multi-layered clamping plate 611. The space between every two adjacent clamping plates forms a fixing space D for clamping the composite material. At this time, the composite material is fixed by utilizing the multiple fixing spaces formed by the multi-layer clamping plates 611, so that the traction force of the long fiber traction mechanism 6 on the continuous long fiber is better enhanced, and the stability of the 3D printer for the continuous long fiber composite melting and stacking can be further improved.
2) On the basis of the modified embodiment 1), in order to further enhance the traction force of the long fiber traction mechanism 6 on the continuous long fiber, it is preferable that the multi-layer clamping plates 611 are sequentially arranged from top to bottom along the height direction of the printing platform 3, and an opening is formed at one end of each clamping plate, and every two adjacent fixing spaces are communicated through the corresponding openings. And more preferably, the openings of every two adjacent clamping plates are staggered. In order to ensure smoothness of continuous filament output, it is further preferable that the outer diameter of the multi-layered clamping plate 611 is sequentially increased from top to bottom.
3) In order to further enhance the traction force of the long fiber traction mechanism 6 on the continuous long fiber on the basis of the modified embodiment 1), it is preferable that the multi-layered clamping plate 611 is provided in order along the width direction or the length direction of the printing table 3.
4) On the basis of any of the variants 1) to 3), the composite material on the long-fiber traction mechanism 6' can be further reinforced with nails or posts or clips.
5) The structure of the long fiber drawing mechanism 6 is changed, that is, nails or posts or clips are directly used as the long fiber drawing mechanism, and when the composite material flows out to the printing platform 3, the composite material is directly fixed on the printing platform 3 by the nails or the posts or the clips.
6) A long fiber input motor electrically connected with the control mechanism is additionally arranged. The motor shaft of the long fiber input motor is drivingly connected to the long fiber conveying roller 52. When printing starts, the control mechanism controls the long fiber input motor to operate, drives the long fiber conveying roller 52 to rotate so as to drive the continuous long fibers to be input into the long fiber conveying pipe 51 to be compounded with the molten material in the printing nozzle 2 until the compound material is output from the printing nozzle 2 to the printing platform 3 and is fixed by the long fiber traction mechanism 6. After the composite material is fixed by the long fiber traction mechanism 6, the control mechanism controls the long fiber input motor to stop running, and the long fiber traction mechanism 6 continuously pulls the continuous long fiber through the movement of the printing platform 3. Therefore, before long fibers are compounded with the molten material, a motor is used for replacing a human hand to rotate the long fiber conveying roller 52, so that continuous long fibers are conveyed into the printing nozzle 2 to be compounded with the molten material and output into the long fiber traction mechanism 6, and the long fiber conveying roller is fixed by the long fiber traction mechanism 6, thereby facilitating convenient long fiber input operation, improving long fiber input stability and reducing manual load; after the long fibers are compounded with the molten materials and fixed by the long fiber traction mechanism 6, long fiber input motors are not used for conveying the long fibers, and the long fiber traction mechanism 6 is directly utilized for inputting, compounding and outputting the long fibers, so that energy conservation is facilitated, and the output rhythm of the long fibers is guaranteed to be more appropriate to the printing rhythm.
Compared with the prior art, the 3D printer has the advantages that the long fiber traction mechanism which does not consume electric energy is arranged on the printing platform, so that the long fiber traction mechanism directly utilizes the motion of the printing platform to generate tension on the continuous long fiber, and the continuous long fiber can be pulled, so that continuous traction on the continuous long fiber can be kept in the printing process without being applied to a conveying motor, the phenomenon that the conveying motor cannot print normally when in fault can be avoided, energy consumption can be saved, and manufacturing cost is reduced.
It is to be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (8)
1. A 3D printer, characterized in that: the device comprises a material feeding mechanism, a printing nozzle, a printing platform, a platform travelling mechanism, a long fiber feeding mechanism, a long fiber traction mechanism, a control mechanism and a power supply mechanism; the melt feeding mechanism comprises a feeding mechanism and an extrusion feeding mechanism; the printing nozzle is communicated with the extrusion port of the extrusion feeding mechanism, and the nozzle faces the printing platform; the platform travelling mechanism is in driving connection with the printing platform and can drive the printing platform to run in a three-dimensional direction; the long fiber feeding mechanism comprises a long fiber conveying pipe and a long fiber conveying roller; one end of the long fiber conveying pipe axially penetrates through the printing nozzle, extends into the printing nozzle and is just over against the nozzle of the printing nozzle, a space between the end face of the long fiber conveying pipe and the inner end face of the nozzle of the printing nozzle forms a wrapping composite space wrapped by an inner cavity of the printing nozzle, and the other end of the long fiber conveying pipe is exposed above the printing nozzle; the long fiber conveying roller is arranged above one exposed end of the long fiber conveying pipe, and a tangent line of the output side of the long fiber conveying roller is collinear with the axis of the long fiber conveying pipe; the long fiber traction mechanism is arranged on the printing platform and is used for fixing a composite material formed by wrapping continuous long fibers by molten materials and output from the printing nozzle so as to continuously traction the continuous long fibers through the movement of the printing platform in the printing process; the control mechanism is electrically connected with the molten material feeding mechanism and the platform travelling mechanism; the power supply mechanism supplies power to the control mechanism, the material feeding mechanism and the platform travelling mechanism;
the long fiber traction mechanism is a crack or groove formed by partially hollowing out the top surface of the printing platform; or the long fiber traction mechanism is a nail, a clip or a column and is used for fixing the composite material flowing out to the printing platform on the printing platform;
or alternatively, the first and second heat exchangers may be,
the long fiber traction mechanism comprises a long fiber fixing body arranged on one side of the top surface of the printing platform; the peripheral wall surface of the long fiber fixing body extends outwards to form a multi-layer clamping plate; the space between every two adjacent clamping plates forms a fixing space for clamping the composite material.
2. The 3D printer of claim 1, wherein: the crack or the groove comprises a plurality of layers of fixing spaces which are sequentially arranged along the height direction of the printing platform and are mutually communicated; the volumes of every two adjacent layers of fixed spaces are different.
3. The 3D printer of claim 1, wherein: the multilayer splint are set gradually from top to bottom along print platform's direction of height, and the opening has been seted up to the one end of every splint, and every two adjacent fixed spaces pass through corresponding opening intercommunication.
4. A 3D printer according to claim 3, wherein: the openings of every two adjacent clamping plates are staggered; and/or the outer diameter of the multi-layer splint is sequentially increased from top to bottom.
5. The 3D printer of claim 1, wherein: the multilayer clamping plates are sequentially arranged along the width direction or the length direction of the printing platform.
6. The 3D printer according to any one of claims 1 to 5, wherein: the long fiber input motor is electrically connected with the control mechanism; a motor shaft of the long fiber input motor is in driving connection with the long fiber conveying roller; when printing starts, the control mechanism controls the long fiber input motor to operate, drives the long fiber conveying roller to rotate and drives the continuous long fiber to be input into the long fiber conveying pipe to be compounded with the molten material in the printing nozzle until the compound material is output from the printing nozzle to the printing platform and is fixed by the long fiber traction mechanism; after the composite material is fixed by the long fiber traction mechanism, the control mechanism controls the long fiber input motor to stop running, and the long fiber traction mechanism continuously pulls the continuous long fiber through the movement of the printing platform.
7. The 3D printer according to any one of claims 1 to 5, wherein: the platform travelling mechanism comprises an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism;
the Y-axis moving mechanism comprises a base, a Y-axis linear driving mechanism and a Y-axis base; the X-axis moving mechanism comprises an X-axis linear driving mechanism and an X-axis base; the Z-axis moving mechanism comprises a Z-axis linear driving mechanism;
the Y-axis base is arranged on the base in a sliding manner and is in driving connection with the Y-axis linear driving mechanism; the X-axis base is arranged on the Y-axis base in a sliding manner and is in driving connection with the X-axis linear driving mechanism; the Z-axis linear driving mechanism is arranged on the X-axis base and is in driving connection with the printing platform.
8. The 3D printer according to any one of claims 1 to 5, wherein: the feeding mechanism and the extrusion feeding mechanism are respectively a feeding mechanism and an extrusion feeding mechanism of a plastic extrusion molding machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711404288.9A CN107856295B (en) | 2017-12-22 | 2017-12-22 | 3D printer |
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| CN201711404288.9A CN107856295B (en) | 2017-12-22 | 2017-12-22 | 3D printer |
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| CN107856295A CN107856295A (en) | 2018-03-30 |
| CN107856295B true CN107856295B (en) | 2024-02-27 |
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| FR3080561B1 (en) * | 2018-04-26 | 2021-04-30 | Bruno Pluchard | PELLET-FORM THERMOPLASTIC MATERIAL EXTRUSION DEVICE FOR THE ADDITIVE MANUFACTURING OF 3D PRINTED OBJECTS |
| EP3782797B1 (en) | 2019-08-17 | 2024-02-07 | Epeire3D | 3d printing device provided with a worm driven by a motor and means for cooling the motor |
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| CN204431743U (en) * | 2015-01-14 | 2015-07-01 | 余金文 | The 3D printer that a kind of continuous fiber composite molten is piled up |
| CN106041087A (en) * | 2016-07-28 | 2016-10-26 | 西安交通大学 | Low-melting metal fusion deposition 3D printing method based on continuous fiber traction |
| DE102015015615A1 (en) * | 2015-12-03 | 2017-06-08 | Audi Ag | Method for producing a component |
| CN207697050U (en) * | 2017-12-22 | 2018-08-07 | 广州市小盒信息科技有限公司 | A kind of 3D printer |
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| CN104260349A (en) * | 2014-09-15 | 2015-01-07 | 余金文 | Fusion-deposition 3D printer and printing method thereof |
| CN204431743U (en) * | 2015-01-14 | 2015-07-01 | 余金文 | The 3D printer that a kind of continuous fiber composite molten is piled up |
| DE102015015615A1 (en) * | 2015-12-03 | 2017-06-08 | Audi Ag | Method for producing a component |
| CN106041087A (en) * | 2016-07-28 | 2016-10-26 | 西安交通大学 | Low-melting metal fusion deposition 3D printing method based on continuous fiber traction |
| CN207697050U (en) * | 2017-12-22 | 2018-08-07 | 广州市小盒信息科技有限公司 | A kind of 3D printer |
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| CN107856295A (en) | 2018-03-30 |
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