CN115384059A

CN115384059A - Double-nozzle 3D printing device

Info

Publication number: CN115384059A
Application number: CN202211184321.2A
Authority: CN
Inventors: 陈丹丹
Original assignee: Shanghai Huke Yuchen Technology Co ltd
Current assignee: Shanghai Huke Yuchen Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-11-25

Abstract

The invention discloses a double-nozzle 3D printing device which comprises a printing platform, wherein a double-nozzle moving mechanism is arranged above the printing platform and is also connected with a Z-axis lifting mechanism, the double-nozzle moving mechanism comprises two groups of double nozzles, each group of double nozzles is respectively connected with a respective double-axis moving mechanism, each double-axis moving mechanism is used for driving the respective double nozzle to move along the X-axis direction and the Y-axis direction, the Z-axis lifting mechanism is used for driving the printing platform to move along the Z-axis direction, the two double-axis moving mechanisms jointly form a herringbone structure, the transverse line of the herringbone structure is used as the X-axis direction, the vertical line of the herringbone structure is used as the Y-axis direction, and each double-axis moving mechanism drives the respective double nozzles to cooperatively move in a large frame area corresponding to the herringbone structure or independently work in a small frame area corresponding to the herringbone structure. The whole device of the invention has simple structure, rapid reaction and convenient popularization and application.

Description

Double-nozzle 3D printing device

Technical Field

The invention belongs to the technical field of 3D printing equipment, and particularly relates to a double-nozzle 3D printing device.

Background

FDM3D printing technology, also known as fused deposition modeling technology, is by far the most readily adopted solution and the most widely used 3D printing technology. FDM shaping principle is simple relatively, and built-in software of FDM3D printer reads 3D model data automatically and stratifies it before printing, and after the layering, the liquid of melting through the high temperature is extruded through beating printer head, and the solidification that condenses rapidly when meeting cold after extruding according to the fixed route of software analysis, then through beating the swing of printer head on the plane to from the bottom up successive layer structure part. The raw materials used by the printing technology are common engineering plastics such as PLA, ABS, PA and the like, even high-performance special engineering plastics such as PEEK, PEKK and the like, the printing technology is convenient to operate, small in size, convenient to use, suitable for office environment and capable of printing workpieces with different filling rates. The FDM3D printing technology can conveniently modify model design at any time, the cost required by production is reduced, the production period is shortened, but the printing speed of a part must be controlled in order to guarantee the quality of the part when the part is printed, and sometimes a supporting body required by the part needs to be printed by changing a wire material, so that a large amount of time is consumed for printing one part.

For the problem, at present, double spray heads are mostly adopted to finish the printing work together, but the existing double spray heads are mostly arranged on the same motion driving system, so that a plurality of limitations exist, firstly, one drag chain is shared, so that two spray heads cannot work simultaneously, and only the replacement of double-color silk materials or the printing of soluble supporting pieces is facilitated, and the efficiency cannot be actually improved; and secondly, the double spray heads cooperatively complete the printing work on the same moving mechanism, so that the moving range of the double spray heads is greatly limited.

Disclosure of Invention

The invention provides a double-nozzle 3D printing device, which structurally adopts a synchronous belt wheel and a synchronous belt as supports of a double-shaft movement mechanism, two groups of double nozzles are respectively provided with own double-shaft movement mechanisms and can realize independent work or coordinated work, the working flexibility of the two groups of double nozzles is increased, the printing efficiency is improved, the printing range is expanded, and the double nozzles with high-temperature nozzles and continuous fiber nozzles are matched for use, so that the printing requirements of complex products can be better met.

The invention can be realized by the following technical scheme:

a double-nozzle 3D printing device comprises a printing platform, a double-nozzle movement mechanism is arranged above the printing platform and is also connected with a Z-axis lifting mechanism, the double-nozzle movement mechanism comprises two groups of double nozzles, each group of double nozzles is respectively connected with a respective double-axis movement mechanism, each double-axis movement mechanism is used for driving the respective double nozzles to move along the X-axis direction and the Y-axis direction, the Z-axis lifting mechanism is used for driving the printing platform to move along the Z-axis direction,

the two double-shaft movement mechanisms jointly form a mesh-shaped structure, the transverse line of the mesh-shaped structure is used as the X-axis direction, the vertical line of the mesh-shaped structure is used as the Y-axis direction, and each double-shaft movement mechanism drives the respective double spray heads to cooperatively move in a large frame area corresponding to the mesh-shaped structure or independently work in a small frame area corresponding to the mesh-shaped structure.

Further, every biax motion all includes two Y axle synchronous belt drive mechanisms along Y axle direction parallel arrangement, two all be connected with an X axle synchronous belt drive mechanism along the setting of X axle direction between the Y axle synchronous belt drive mechanism, every X axle synchronous belt drive mechanism is connected with respective double spray head respectively, wherein, comes from two biax motion with a Y guide shaft of Y axle synchronous belt drive mechanism sharing of one side, the Y guide shaft sets up along Y axle direction.

Furthermore, the Y-axis synchronous belt transmission mechanism comprises a Y-axis main belt wheel and a Y-axis secondary belt wheel which are rotationally connected with the Y-axis synchronous belt, the centers of the Y-axis main belt wheels of two Y-axis synchronous belt transmission mechanisms in the same double-shaft motion mechanism are coaxially connected together through a transmission shaft, a driving belt wheel is connected on the transmission shaft, the driving belt wheel is rotationally connected with a driving belt wheel connected on the output shaft of a Y-axis motor through a driving synchronous belt,

the Y-axis synchronous belt is arranged along the Y-axis direction, one side of the Y-axis synchronous belt is fixedly connected with a Y-axis sliding block, an X-axis synchronous belt transmission mechanism is connected between the Y-axis sliding blocks of two Y-axis synchronous belt transmission mechanisms in the same double-shaft movement mechanism, the Y-axis sliding block is sleeved on a Y guide shaft,

the Y-axis motor is used for driving the driving belt wheel to rotate together with the transmission shaft through the driving synchronous belt, so that the Y-axis main belt wheel is driven to move together with a Y-axis sliding block on the Y-axis synchronous belt along a Y guide shaft, namely the Y-axis direction;

the X-axis synchronous belt transmission mechanism comprises an X-axis main belt wheel and an X-axis secondary belt wheel which are rotationally connected with an X-axis synchronous belt, the central shaft of the X-axis main belt wheel is coaxially connected with the output shaft of an X-axis motor, an X-axis sliding block is fixedly connected to one side of the X-axis synchronous belt, the X-axis sliding block is sleeved on one or more X guide shafts, double spray heads are arranged on the X-axis sliding block, the X-axis synchronous belt is arranged along the X-axis direction, each X guide shaft is connected between two Y-axis sliding blocks in the same double-axis movement mechanism,

the X-axis motor is used for driving the double-nozzle on the X-axis motor to move along an X-axis guide shaft, namely the X-axis direction, through the X-axis synchronous belt.

Furthermore, proximity switches are arranged at positions close to the X-axis main belt wheel and the X-axis secondary belt wheel, and a proximity switch is also arranged on the side face, close to the other Y-axis sliding block, of one Y-axis sliding block.

Furthermore, the Z-axis lifting mechanism comprises two roller screws arranged in parallel along the Z-axis direction, screw nuts of the two roller screws are respectively and correspondingly connected with two opposite side edges of the printing platform, four corners of the printing platform are respectively provided with a guide post in a penetrating manner, each guide post is parallel to the roller screw, one end of a screw rod in each roller screw is connected with a Z-axis motor, and the Z-axis motor is used for driving the screw nuts and the printing platform to move along the guide posts, namely the Z-axis direction.

Further, every group the double spray head all includes a high temperature nozzle and a continuous fibers shower nozzle, the high temperature nozzle includes the first bed frame of extruding that the top of the first bed frame of extruding is provided with first feed inlet, and the bottom is through first heating piece and first nozzle intercommunication, the continuous fibers shower nozzle includes that the second base extrudes the bed frame the top that the bed frame was extruded to the second is provided with the second feed inlet, and the bottom is through shearing mechanism, second heating piece and second nozzle intercommunication be provided with cyclic annular roller mechanism around the second nozzle, cyclic annular roller mechanism is used for carrying out the roll-in operation to the printing face, shearing mechanism is used for carrying out the shearing operation to continuous fibers first extrude bed frame and second and extrude and all be provided with wind cooling and water-cooling heat dissipation mechanism on the bed frame.

Furthermore, the shearing mechanism comprises a steering engine, a turntable of the steering engine is rotatably connected with one end of the tool rest through a connecting rod, the other end of the tool rest can be rotatably arranged on the second extrusion base frame, a blade is arranged on the tool rest, a notch is arranged at the position of the tool rest corresponding to the blade and used for allowing continuous fiber wires to pass through, the continuous fiber wires at the position of the notch are exposed out of the conveying pipe,

the steering engine is used for driving the tool rest to rotate together with the blade, so that continuous fiber wires in the position of the notch are cut off.

Furthermore, a groove capable of accommodating the blade is arranged on the position, corresponding to the blade, of the tool rest, and the blade in the notch position is exposed out of the groove.

Further, the water-cooling heat dissipation mechanism is arranged at the end part of the first extrusion base frame close to the first heating block or the second extrusion base frame close to the second heating block,

the water-cooling heat dissipation mechanism comprises two S-shaped channels arranged on the inner surface of the front side surface of the first extrusion base frame or the second extrusion base frame, a rectangular wave-shaped channel is arranged on the inner surface of the rear side surface of the first extrusion base frame or the second extrusion base frame, one end of the rectangular wave-shaped channel penetrates through the inside of the first extrusion base frame or the second extrusion base frame to be communicated with one end of the S-shaped channel, the other end of the S-shaped channel is communicated with a water inlet arranged on the outer surface of the front side surface,

the other end of the rectangular wavy channel penetrates through the interiors of the first extrusion base frame and the second extrusion base frame to be communicated with one end of another S-shaped channel, and the other end of the other S-shaped channel is communicated with a water outlet formed in the outer surface of the front side surface;

the air-cooled heat dissipation mechanism comprises a support frame arranged on a first extrusion base frame and a second extrusion base frame,

a first heat radiation fan and a first air channel are arranged on the support frame corresponding to the first extrusion base frame, one end of the first air channel is arranged towards the first nozzle, and the other end of the first air channel is communicated with an air outlet of the first heat radiation fan;

the supporting frame corresponding to the second extrusion base frame is of an L-shaped structure, an annular opening facing the second extrusion base frame bottom is arranged on the long side of the supporting frame, a second cooling fan is arranged on the long side of the supporting frame, an air outlet of the second cooling fan faces the second extrusion base frame and is close to the position of the second heating block, a third cooling fan and a second air channel are arranged on the short side of the supporting frame, one end of the second air channel is communicated with an air outlet of the third cooling fan, and the other end of the second air channel is arranged facing the second nozzle.

Further, the annular rolling mechanism comprises an annular rolling seat and an annular gland which are matched with each other, a second nozzle is arranged at the center of the annular rolling seat, the annular gland is arranged below the annular rolling seat, the annular rolling seat is arranged above the annular rolling seat, a plurality of cambered surface grooves are uniformly arranged at intervals on the contact surface of the annular rolling seat and the annular gland, every two upper cambered surface grooves and every two lower cambered surface grooves are correspondingly arranged for bearing balls, an opening is arranged on the cambered surface groove of the annular gland, part of the surface of each ball is exposed outside the opening,

and two extending ears are respectively arranged on two sides of the annular rolling seat, each extending ear is connected with one end of a respective telescopic rod, and the other end of each telescopic rod is connected with the second extrusion base frame and is used for driving the annular rolling seat and the annular gland to move along the extrusion direction of the continuous fibers.

The beneficial technical effects of the invention are as follows:

1. adopt hold-in range and synchronous pulley to constitute biax motion jointly to two biax motion drive two sets of dual spray respectively, realize the independent work or the coordinated work of two sets of dual spray, increased the work flexibility of dual spray, enlarged the printing scope, improved and printed efficiency, thereby can satisfy the printing demand of complicated product.

2. The parallelly connected mode of high temperature shower nozzle and continuous fibers shower nozzle is adopted to the dual spray, can satisfy the printing material demand of more products, and two shower nozzles all adopt water-cooling and forced air cooling radiating mode simultaneously, can dispel the heat respectively to a plurality of positions of shower nozzle, promote the radiating effect.

3. The continuous fiber nozzle has a rolling shearing function, the shearing function is convenient for controlling the use of continuous fibers, and the rolling function can roll the printing surface in all directions in the printing process so as to improve the strength of the formed continuous fiber part, reduce the deformation degree, enhance the binding force of a continuous fiber interface and improve the quality of a printed product.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the biaxial movement mechanism of the present invention;

FIG. 3 is a schematic diagram of the Y-axis synchronous belt transmission mechanism of the present invention;

FIG. 4 is a schematic diagram of the structure of the X-axis synchronous belt conveying mechanism of the present invention;

FIG. 5 is a schematic structural view of the Z-axis lifting mechanism of the present invention;

FIG. 6 is a schematic view of the overall structure of the dual spray head of the present invention;

FIG. 7 is a schematic view of the overall structure of the high temperature showerhead of the present invention;

fig. 8 is a schematic structural view of a cooling water flow passage of the water-cooled heat dissipating mechanism of the present invention, in which (a) a surface S-shaped passage and (b) a rectangular corrugated passage are shown;

FIG. 9 is a schematic view of the overall configuration of the continuous fiber spray head of the present invention;

fig. 10 is an overall structural view of the shearing mechanism of the present invention, (a) shows a schematic view of a fitting structure of a blade holder, a blade, and a link, and (b) shows a schematic view of a fitting structure of a blade holder and a steering engine;

FIG. 11 is a schematic view of the overall structure of the rolling mechanism of the present invention;

FIG. 12 is a schematic view of the fitting structure of the annular gland and the annular roller seat in the roller pressing mechanism of the present invention;

FIG. 13 is a schematic structural view of an air-cooling heat dissipation mechanism of the continuous fiber nozzle of the present invention;

wherein, 1-printing platform, 2-Z axis lifting mechanism, 21-roller screw, 22-guide column, 23-Z axis motor, 24-support plate, 25-PVC pipe, 3-double spray head, 31-high temperature spray head, 311-first extrusion pedestal, 312-first feed inlet, 313-first heating block, 314-first nozzle, 315-S shaped channel, 316-rectangular wave channel, 317-support frame, 318-first air cooling heat radiation fan, 319-first air duct, 32-continuous fiber spray head, 321-second extrusion pedestal, 322-shearing mechanism, 3221-steering engine, 3222-connecting rod, 3223-knife rest, 3224-knife blade, 3225-roller bearing, 323-second heating block, 324-second nozzle, 325-rolling mechanism, 3251-annular rolling seat, 3252-annular gland, 3253-cambered groove, 3254-telescopic rod, 326-second cooling fan, 327-third cooling fan, 328-second air duct, 33-nozzle mounting flange, 4-Y-axis synchronous belt transmission mechanism, 41-Y-axis synchronous belt, 42-Y-axis main belt wheel, 43-Y-axis driven belt wheel, 44-transmission shaft, 45-driving belt wheel, 46-Y-axis motor, 47-driving belt wheel, 48-Y-axis sliding block, 49-Y-axis guide shaft, 5-X-axis synchronous belt transmission mechanism, 51-X-axis synchronous belt, 52-X-axis main belt wheel, 53-X-axis driven belt wheel, 54-X-axis motor, 55-X-axis sliding block and 56-X-axis guide shaft, 57-proximity switch.

Detailed Description

The following detailed description of the preferred embodiments will be made with reference to the accompanying drawings.

As shown in fig. 1-5, the present invention provides a dual-nozzle 3D printing apparatus, which includes a printing platform 1, a dual-nozzle moving mechanism disposed above the printing platform 1 and connected to a Z-axis lifting mechanism 2, the dual-nozzle moving mechanism includes two sets of dual nozzles 3, each set of dual nozzles 3 is connected to a respective dual-axis moving mechanism, each dual-axis moving mechanism is configured to drive a respective dual nozzle 3 to move along an X-axis direction and a Y-axis direction, the Z-axis lifting mechanism 2 is configured to drive the printing platform 1 to move along the Z-axis direction, wherein the two dual-axis moving mechanisms jointly form a mesh-shaped structure, a transverse line of the mesh-shaped structure is used as the X-axis direction, a vertical line of the mesh-shaped structure is used as the Y-axis direction, and each dual-axis moving mechanism drives a respective dual nozzle 3 to cooperatively move in a large frame region corresponding to the mesh-shaped structure, or independently work in a small frame region corresponding to the mesh-shaped structure. Like this, drive respective double spray with the help of two relatively independent biax motion and carry out collaborative work or autonomous working, increased the flexibility of double spray motion, enlarged the printing scope, promoted printing efficiency, can satisfy the printing demand of complicated product, whole compact structure, the realization of being convenient for simultaneously, the practicality is strong. The method comprises the following specific steps:

as shown in fig. 2, each biaxial movement mechanism includes two Y-axis synchronous belt transmission mechanisms 4 arranged in parallel along the Y-axis direction, and an X-axis synchronous belt transmission mechanism 5 arranged along the X-axis direction is connected between the two Y-axis synchronous belt transmission mechanisms 4, as shown in fig. 3-4, each X-axis synchronous belt transmission mechanism 5 is connected with its own dual nozzle 3, wherein 4Y guide shafts are shared by the Y-axis synchronous belt transmission mechanisms from the same side of the two biaxial movement mechanisms, and the Y guide shafts are arranged along the Y-axis direction, thereby forming a mesh-shaped structure. In order to avoid interference, the Y-axis synchronous belt transmission mechanism from the two double-shaft movement mechanisms at the same side can be arranged up and down relative to the Y guide shaft, the cost can be reduced to a certain extent by adopting the synchronous belt transmission mechanism, the transmission precision can be controlled by means of pitch selection of the synchronous belt, and guarantee is provided for the movement precision of the double spray heads.

The Y-axis synchronous belt transmission mechanism 4 comprises a Y-axis primary pulley 42 and a Y-axis secondary pulley 43 which are rotatably connected with a Y-axis synchronous belt 41, the centers of the Y-axis primary pulleys 42 of two Y-axis synchronous belt transmission mechanisms 4 in the same two-axis motion mechanism are coaxially connected together through a transmission shaft 44, the transmission shaft 44 is connected with a driving pulley 45, the driving pulley 45 is rotatably connected with a driving pulley 47 connected to an output shaft of a Y-axis motor 46 through a driving synchronous belt, the Y-axis synchronous belt 41 is arranged along the Y-axis direction, one side of the Y-axis synchronous belt 41 is fixedly connected with a Y-axis slider 48, an X-axis synchronous belt transmission mechanism 5 is connected between the Y-axis sliders 48 of the two Y-axis synchronous belt transmission mechanisms 4 in the same two-axis motion mechanism, the Y-axis slider 48 is sleeved on a Y-axis guide shaft 49, so that the Y-axis motor 46 drives the driving pulley 45 to rotate together with the transmission shaft through the driving synchronous belt, thereby driving the Y-axis primary pulley 42 and the Y-axis slider 48 on the Y-axis synchronous belt 41 to move along the Y-axis guide shaft 49, i.e. the Y-axis direction.

Considering the connection between the Y-axis slider 48 and the Y-axis timing belt 41, a notch for accommodating the Y-axis timing belt is formed at the connection position of the Y-axis slider 48, and a pressing plate is disposed thereon and fixed to the Y-axis slider 48 by a bolt, thereby clamping and fixing the Y-axis slider 48 and the Y-axis timing belt 41.

In addition, the two Y-axis primary pulleys 42 of the Y-axis synchronous belt drive mechanism 4 are coaxially connected together by the transmission shaft 44, so that the synchronism of the transmission can be fully ensured.

Similarly, the X-axis synchronous belt transmission mechanism 5 also adopts a similar structure, and includes an X-axis primary belt pulley 52 and an X-axis secondary belt pulley 53 which are connected with the rotation of the X-axis synchronous belt 51, the central shaft of the X-axis primary belt pulley 52 is coaxially connected with the output shaft of the X-axis motor 54, an X-axis slider 55 is fixedly connected to one side of the X-axis synchronous belt 51, and is similar to the fixing manner of the Y-axis slider, the X-axis slider 55 is sleeved on one or more X-axis guide shafts 56, and is provided with the dual nozzles 3 thereon, the X-axis synchronous belt 51 is arranged along the X-axis direction, and each X-axis guide shaft 56 is connected between two Y-axis sliders 48 in the same two-axis movement mechanism, so that the X-axis motor 54 is used for driving the dual nozzles 3 thereon to move along the X-axis direction, that is, along the X-axis direction, through the X-axis synchronous belt 51.

For convenience of installation, an installation plate is arranged on the Y-axis sliding blocks 48 to facilitate installation of the X-axis main belt wheel, the X-axis driven belt wheel and the X-axis motor, certainly, in order to avoid collision of the X-axis sliding blocks 55 with the installation plate, proximity switches 57 are arranged at positions close to the X-axis main belt wheel 52 and the X-axis driven belt wheel 53, the proximity switches 57 can be arranged on the installation plate, and similarly, in consideration of the fact that the two Y-axis sliding blocks 48 are sleeved on the Y guide shaft 49 and collision is avoided, the proximity switches 57 are also arranged on the side face, close to the other Y-axis sliding block 48, of one Y-axis sliding block 48, so that the operation safety of the mechanism is better protected.

As shown in fig. 5, the Z-axis lifting mechanism 2 includes two roller screws 21 arranged in parallel along the Z-axis direction, and lead screw nuts thereof are respectively connected with two opposite sides of the printing platform 1, a guide post 22 is respectively arranged at four corners of the printing platform 1 in a penetrating manner, each guide post 22 is parallel to the roller screw 21, a linear bearing can be added, which facilitates the linear motion of the guide posts 22 and the printing platform 1, the guide posts 22 can be equally divided into two groups, each group is equally divided and arranged at two sides of the roller screw 21, and the lead screw of each roller screw 22 can also be arranged on the printing platform 1 in a penetrating manner, so that the stability of the up-and-down motion can be better ensured, one end of the lead screw is connected with the Z-axis motor 23, so that the Z-axis motor 23 can drive the lead screw nut and the printing platform 1 to move along the guide post 22, i.e. along the Z-axis direction.

In order to construct the support of the Z-axis lifting mechanism 2, the top and the bottom of each group of guide posts 22 are respectively connected with a support plate 24, the two ends of the same screw rod are also connected onto the support plates 24, the support of the whole mechanism can be jointly formed by the support of the printing platform 1, and meanwhile, the end parts of the support plates 24 arranged up and down can be connected with PVC pipes 25 used for wiring, so that the wiring of a control cable of a double-axis movement mechanism is facilitated, and the circuit is better carded.

When the double-nozzle 3D printing device is used for simultaneously printing two different parts, printing raw materials needed by one printing piece, such as resin wire materials and continuous fiber wire materials, are transmitted to the corresponding double nozzles under the driving of the motor gear through a far-end wire feeding module, and printing raw materials needed by the other printing piece are transmitted to the other double nozzles under the driving of the motor gear through another far-end wire feeding module.

The FDM3D printer tends to be developed in the direction of printing material diversity at present. In order to replace the single-material printing which is frequently adopted at present, the invention designs the double nozzles which can print various materials simultaneously, adopts a design mode that the high-temperature nozzle and the continuous fiber nozzle with the rolling and shearing functions are combined into a whole in a parallel connection mode, and concretely comprises the following steps:

as shown in fig. 6, each set of the dual spray heads 3 includes a high temperature spray head 31 and a continuous fiber spray head 32, which can be mounted on the X-axis slider 55 together by a spray head mounting flange 33, as shown in fig. 7, wherein the high temperature spray head 31 includes a first extrusion base frame 311, a first feeding hole 312 is provided at a top end of the first extrusion base frame 311, and a bottom end thereof is communicated with a first nozzle 314 through a first heating block 313. In the working process, send a module with printing silk material source continuously to lead to the first feed inlet 312 of high temperature nozzle 31 through distal end, via the transmission of first extrusion bed frame 311 downwards, the bottom and the first heating block 313 of first extrusion bed frame 311 are connected fixedly with the help of the conversion sheet metal component, printing silk material can get into first heating block 313 smoothly like this, have become the high temperature state with first heating block through the heating rod in advance this moment, and then printing silk material is transformed into the molten state through high temperature and can be extruded from the first nozzle 314 of first heating block 313 bottom, can be equipped with K type heat sensor on first heating block in addition, be convenient for real time monitoring heating block temperature state.

A high temperature resistant mica plate heat insulation pad is arranged between the first extrusion base frame 311 and the first heating block 313 to prevent the heat of the first heating block 313 from transferring upwards, so that the printing filament material enters a molten state prematurely and cannot enter the first nozzle 314 to be extruded smoothly, but the heat is still possible to transfer upwards, therefore, the invention is provided with a water cooling heat dissipation mechanism inside the first extrusion base frame 311, as shown in fig. 8, the water cooling heat dissipation mechanism comprises two S-shaped channels 315 arranged on the inner surface of the front side surface of the first extrusion base frame 311, a rectangular corrugated channel 316 is arranged on the inner surface of the rear side surface of the first extrusion base frame 3111, one end of the rectangular corrugated channel 316 penetrates through the inside of the first extrusion base frame 311 to be communicated with one end of one S-shaped channel 311 to be communicated with a water inlet arranged on the outer surface of the front side, the other end of the rectangular corrugated channel 316 penetrates through the inside of the first extrusion base frame 311 to be communicated with one end of another S-shaped channel 315, and the other end of the other S-shaped channel 316 is communicated with a water outlet arranged on the outer surface of the front side.

The front side and the rear side of the first extrusion base frame 311 can be respectively provided with a water-cooling sealing cover, four corners of the water-cooling sealing cover are fixed by screws to prevent cooling water from overflowing, meanwhile, the water-cooling sealing cover on the front side is provided with two M3 water-cooling adapter connectors, one is used as a water inlet, and the other is used as a water outlet, so that the cooling water flows into the circulating system from the water inlet and flows into the rear side through one S-shaped channel 315 under the action of a water pump, then flows into the front side through a rectangular corrugated channel 316 on the rear side, and then reaches the water outlet through the other S-shaped channel on the front side, finally the path of the whole water-cooling circulating system is completed, the cooling water is continuously circulated in sequence to take away heat transferred by the first heating block 313, the process that wires are transferred downwards from the first extrusion base frame 311 in the printing process is prevented from failing to reach the first heating block due to the fact that the heat transferred by the first heating block 313 reaches a certain temperature, the wires are converted into a semi-melting state in the middle area of the first extrusion base frame 311, and then the wires cannot be normally extruded from the first extrusion base frame 311 to form blockage, and a K-type heat sensor is arranged on the side of the first extrusion base frame to monitor the temperature in real-time.

In addition, in order to accelerate the rapid forming of the molten wire extruded from the first nozzle 314, an air-cooled heat dissipation mechanism is further provided, the air-cooled heat dissipation mechanism comprises a support frame 317 arranged on the first extrusion base frame 311, a first heat dissipation fan 318 and a first air channel 319 are arranged on the support frame 317, one end of the first air channel 319 is arranged towards the first nozzle 314, and the other end of the first air channel 319 is communicated with an air outlet of the first heat dissipation fan 318, so that the printing material in the molten state extruded from the first nozzle 314 is cooled.

As shown in fig. 9, the continuous fiber nozzle 32 includes a second base extrusion base frame 321, a second feed port 322 is disposed at a top end of the second base extrusion frame 321, a bottom end of the second base extrusion frame 321 is communicated with a second nozzle 324 through a shearing mechanism 322 and a second heating block 323, a ring-shaped rolling mechanism 325 is disposed around the second nozzle 324, the ring-shaped rolling mechanism 325 is configured to perform a rolling operation on a printing surface, the shearing mechanism 322 is configured to perform a shearing operation on the continuous fiber, and air-cooling and water-cooling heat dissipation mechanisms are disposed on the second base extrusion frame 321.

In the working process, printing wires are continuously led into a second feeding hole 322 at the top of a second extrusion base frame 321 through a far-end wire feeding module, are transferred downwards through the second extrusion base frame 321, pass through a middle shearing mechanism 322, can smoothly enter a second heating block 323 provided with a heating rod and a K-type heat sensor, are softened by a high-temperature environment, are extruded out from a second nozzle 324 at the bottom of the second heating block 323, and are taken as an executive component by electric-driven telescopic rods arranged at two sides of the second extrusion base frame 321 and a roller pressing mechanism formed by a rolling component containing balls as required, and after the telescopic rods at two sides receive operation signals, the heights of the rolling components can be adjusted up and down to complete the rolling operation of a printing surface; meanwhile, when the continuous fibers need to be interrupted or the work is finished, the shearing mechanism receives a signal to start running and cuts off the continuous carbon fibers transmitted downwards from the middle. In addition, the air cooling mechanism and the water cooling mechanism can be installed to dissipate heat for different positions in the printing process.

As shown in fig. 10, the shearing mechanism 322 includes a steering engine 3221, a turntable of the steering engine 3221 is rotatably connected to one end of a tool holder 3223 through a connecting rod 3222, the other end of the tool holder 3223 is rotatably disposed on the second extrusion base frame 321, a blade 3224 is disposed on the second extrusion base frame, a notch is disposed at a position of the tool holder 3223 corresponding to the blade 3224, the notch is used for allowing a continuous fiber wire to pass through, the continuous fiber wire at the notch position is exposed outside the delivery pipe, so that the steering engine 3221 can drive the tool holder 3223 and the blade 3224 to rotate, the continuous fiber wire at the notch position can be cut off in a rotary manner rather than a flat manner, the cutting effect is better, and the driving force required by the shearing mechanism is smaller than that in a flat manner.

In order to fix the blade 3224 conveniently, a groove capable of accommodating the blade 3224 is formed in the blade holder 3223 at a position corresponding to the blade 3224, the blade 3224 at the position of the notch is exposed outside the groove, and other parts of the blade 3224 may be wholly or partially surrounded by the groove.

In order to conveniently shear the continuous fibers, the conveying pipes at the position of the shearing mechanism need to be cut off, namely two conveying pipes are needed to finish the conveying of the continuous fibers at the front side and the rear side of the shearing mechanism, the ports of the corresponding conveying pipes can be fixed on the second extrusion base frame 321 through the stop blocks, triangular openings matched with the surfaces of part of the conveying pipes are arranged on the inner sides of the stop blocks, triangular openings are also arranged at the positions corresponding to the second extrusion base frame 321, and the ends of the conveying pipes are fixed through the matching of the two triangular openings.

In order to realize the rotation of the tool rest 3223, a roller bearing 3225 is arranged above the tool rest 3223 and at the position of the second extrusion base frame 321, an inner ring of the roller bearing 3225 is connected with one end of the tool rest 3223 through a transmission shaft, the other end of the tool rest 3223 is connected with an output turntable of the steering engine 3221 through a connecting rod 3222, and the connecting rod 3222 can be in a pull hook form, so that through holes matched with the through holes are formed in the other end of the tool rest 3223 and the output turntable of the steering engine, when continuous fibers need to be interrupted after work is finished, the steering engine operates to drive the pull hook to drive the whole tool rest to rotate around the roller bearing, and further, the continuous fibers transmitted downwards from the middle can be cut off through a disconnection opening of the conveying pipe by the blade.

The water-cooling heat dissipation mechanism arranged between the shearing mechanism 322 and the second heating block 323 is similar to the water-cooling heat dissipation mechanism in the high-temperature spray head, and comprises two S-shaped channels and a rectangular wave-shaped channel which are arranged on the inner surfaces of the front side and the rear side of the second extrusion base frame 321, the front opening and the rear opening of the rectangular wave-shaped channel are respectively communicated with the respective S-shaped channels, and a water outlet and a water inlet are respectively arranged at the positions corresponding to the two S-shaped channels, so that the water-cooling heat dissipation is realized.

Similarly, the air-cooled heat dissipation mechanism is similar to the air-cooled heat dissipation mechanism of the high temperature nozzle, except that the air-cooled heat dissipation mechanism is provided with two heat dissipation fans, one of the two heat dissipation fans is aligned with the second nozzle 324 and used for heat dissipation of the second nozzle, and the other heat dissipation fan is aligned with the water-cooled heat dissipation mechanism and used for heat dissipation of the second heating block 323 uploaded to the position of the second extrusion base frame 321, specifically, as shown in fig. 13, the support frame corresponding to the second extrusion base frame 321 is formed into an L-shaped structure, the long side of the support frame is provided with an annular opening facing the bottom of the second extrusion base frame 321, the long side of the support frame is provided with the second heat dissipation fan 326, the short side of the support frame is provided with the third heat dissipation fan 327 and the second air duct 328, one end of the second air duct 328 is communicated with the air outlet of the third heat dissipation fan 327, and the other end of the second air duct is provided facing the second nozzle 324.

As shown in fig. 11-12, the ring rolling mechanism 325 includes a ring rolling seat 3251 and a ring pressing cover 3252, which are engaged with each other, the center of which is provided with a second nozzle 324, and the ring pressing cover is under and above, the contact surface of the ring rolling seat is on top, and a plurality of arc grooves 3253 are uniformly spaced, each of the upper and lower arc grooves 3253 is correspondingly provided for bearing a ball, an opening is provided on the arc groove 3253 of the ring pressing cover, and part of the surface of the ball is exposed outside the opening, so that during rolling, the ball is forced to rotate inside the two arc grooves along with the movement of the continuous fiber nozzle, so as to facilitate rolling the printing surface, two extending ears are respectively provided on both sides of the ring rolling seat, each extending ear is connected to one end of a respective telescopic rod 3254, the telescopic rod 3254 is of an electrically operated structure, and the other end of the telescopic rod is connected to a second extrusion base 321, so as to drive the ring rolling seat and the ring pressing cover to move along the extrusion direction of the continuous fiber, and move towards the printing surface as required, so as to implement the rolling operation; or moving the printing roller to a direction away from the printing surface, and finishing the rolling operation.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and that many variations or modifications may be made thereto without departing from the principles and spirit of the invention, the scope of which is therefore defined by the appended claims.

Claims

1. The utility model provides a dual spray 3D printing device which characterized in that: comprises a printing platform, a double-nozzle moving mechanism is arranged above the printing platform and is also connected with a Z-axis lifting mechanism, the double-nozzle moving mechanism comprises two groups of double nozzles, each group of double nozzles is respectively connected with a respective double-axis moving mechanism, each double-axis moving mechanism is used for driving the respective double nozzles to move along the X-axis direction and the Y-axis direction, the Z-axis lifting mechanism is used for driving the printing platform to move along the Z-axis direction,

2. The dual nozzle 3D printing device according to claim 1, wherein: every biaxial movement mechanism all includes two Y axle synchronous belt drive mechanism along Y axle direction parallel arrangement, two all be connected with an X axle synchronous belt drive mechanism along the setting of X axle direction between the Y axle synchronous belt drive mechanism, every X axle synchronous belt drive mechanism is connected with respective double spray respectively, wherein, comes from Y axle synchronous belt drive mechanism sharing Y guiding axle with one side among two biaxial movement mechanisms, the Y guiding axle sets up along Y axle direction.

3. The dual nozzle 3D printing device according to claim 2, wherein: the Y-axis synchronous belt transmission mechanism comprises a Y-axis main belt wheel and a Y-axis secondary belt wheel which are rotationally connected with the Y-axis synchronous belt, the centers of the Y-axis main belt wheels of two Y-axis synchronous belt transmission mechanisms in the same double-shaft movement mechanism are coaxially connected together through a transmission shaft, a driving belt wheel is connected on the transmission shaft, the driving belt wheel is rotationally connected with a driving belt wheel connected on an output shaft of a Y-axis motor through a driving synchronous belt,

the Y-axis motor is used for driving the driving belt pulley and the transmission shaft to rotate through the driving synchronous belt, so that the Y-axis main belt pulley and a Y-axis sliding block on the Y-axis synchronous belt are driven to move along a Y guide shaft, namely the Y-axis direction;

the X-axis synchronous belt transmission mechanism comprises an X-axis main belt wheel and an X-axis secondary belt wheel which are rotationally connected with an X-axis synchronous belt, the central shaft of the X-axis main belt wheel is coaxially connected with the output shaft of an X-axis motor, one side of the X-axis synchronous belt is fixedly connected with an X-axis sliding block, the X-axis sliding block is sleeved on one or more X guide shafts, double spray heads are arranged on the X-axis sliding block, the X-axis synchronous belt is arranged along the X-axis direction, each X guide shaft is connected between two Y-axis sliding blocks in the same double-axis motion mechanism,

the X-axis motor is used for driving the double-nozzle on the X-axis motor to move along an X-axis guide shaft, namely the X-axis direction, through an X-axis synchronous belt.

4. The dual nozzle 3D printing device according to claim 3, wherein: proximity switches are arranged at positions close to the X-axis main belt wheel and the X-axis secondary belt wheel, and a proximity switch is also arranged on the side surface of one Y-axis sliding block close to the other Y-axis sliding block.

5. The dual head 3D printing device of claim 1, wherein: the Z-axis lifting mechanism comprises two roller screws which are arranged in parallel along the Z-axis direction, screw nuts of the two roller screws are correspondingly connected with two opposite side edges of the printing platform respectively, four corners of the printing platform are respectively provided with a guide post in a penetrating manner, each guide post is parallel to the roller screws, one end of a screw rod in each roller screw is connected with a Z-axis motor, and the Z-axis motor is used for driving the screw nuts and the printing platform to move along the guide posts, namely the Z-axis direction.

6. The dual nozzle 3D printing device according to claim 1, wherein: every group the double spray head all includes a high temperature nozzle and a continuous fibers shower nozzle, high temperature nozzle includes the first bed frame of extruding the first top of extruding the bed frame is provided with first feed inlet, and first heating piece and first nozzle intercommunication are passed through to the bottom, the continuous fibers shower nozzle includes that the bed frame is extruded to the second base the top that the bed frame was extruded to the second is provided with the second feed inlet, and the bottom is through shearing mechanism, second heating piece and second nozzle intercommunication be provided with annular roller press around the second nozzle and construct, annular roller press constructs and is used for carrying out the roll-in operation to the printing face, shearing mechanism is used for shearing continuous fibers the operation all be provided with wind cooling and water-cooling heat dissipation mechanism on the first bed frame of extruding and the second of extruding.

7. The dual nozzle 3D printing device according to claim 6, wherein: the shearing mechanism comprises a steering engine, a rotary disc of the steering engine is rotatably connected with one end of a tool rest through a connecting rod, the other end of the tool rest can be rotatably arranged on a second extrusion base frame, a blade is arranged on the second extrusion base frame, a notch is arranged at the position of the tool rest corresponding to the blade and used for allowing continuous fiber wires to pass through, the continuous fiber wires at the position of the notch are exposed out of the conveying pipe,

8. The dual nozzle 3D printing device according to claim 7, wherein: a groove capable of containing the blade is formed in the position, corresponding to the blade, of the tool rest, and the blade in the notch position is exposed out of the groove.

9. The dual nozzle 3D printing device according to claim 1, wherein: the water-cooling heat dissipation mechanism is arranged at the end part of the first extrusion base frame close to the first heating block or the second extrusion base frame close to the second heating block,

the water-cooling heat dissipation mechanism comprises two S-shaped channels arranged on the inner surface of the front side surface of the first extrusion base frame or the second extrusion base frame, a rectangular wavy channel is arranged on the inner surface of the rear side surface of the first extrusion base frame or the second extrusion base frame, one end of the rectangular wavy channel penetrates through the interior of the first extrusion base frame or the second extrusion base frame and is communicated with one end of one S-shaped channel, the other end of the S-shaped channel is communicated with a water inlet arranged on the outer surface of the front side surface,

the other end of the rectangular wavy channel penetrates through the interiors of the first extrusion base frame and the second extrusion base frame to be communicated with one end of the other S-shaped channel, and the other end of the other S-shaped channel is communicated with a water outlet formed in the outer surface of the front side surface;

10. The dual nozzle 3D printing device according to claim 1, wherein: the annular rolling mechanism comprises an annular rolling seat and an annular gland which are mutually matched, a second nozzle is arranged at the central position of the annular rolling seat, the annular gland is arranged below the annular rolling seat, a plurality of cambered surface grooves are uniformly arranged on the contact surface of the annular rolling seat and the annular rolling seat at intervals, every two upper cambered surface grooves and every two lower cambered surface grooves are correspondingly arranged for bearing balls, an opening is arranged on the cambered surface groove of the annular gland, part of the surface of each ball is exposed out of the opening,