CN112248438A

CN112248438A - Novel high-speed flexible material printing nozzle and 3D printing equipment thereof

Info

Publication number: CN112248438A
Application number: CN202011069509.3A
Authority: CN
Inventors: 张伟; 韩成超; 丁进
Original assignee: Dongguan Yuanzhu Intelligent Technology Co ltd; Shanghai Intamsys Technology Co ltd
Current assignee: Dongguan Yuanzhu Intelligent Technology Co ltd; Shanghai Intamsys Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-01-22

Abstract

The invention provides a novel high-speed flexible material printing nozzle and 3D printing equipment thereof, the novel high-speed flexible material printing nozzle comprises a feeding area, a heat dissipation area and a melting area, wherein the feeding area, the heat dissipation area and the melting area form a feeding path in sequence, the melting area is positioned at the tail end of the feeding path, a high-speed extruding mechanism is arranged on the feeding area, the high-speed extruding mechanism is arranged at a position close to the heat dissipation area, the heat dissipation area and the melting area are arranged at intervals, the heat dissipation area and the melting area are connected through a connecting piece, the connecting piece is used for blocking heat from being transmitted to the heat dissipation area, the melting area is positioned at the tail end of the feeding path, and the high-speed extruding mechanism on the feeding area is arranged close to the heat dissipation area, so that the path for feeding wires is shortened, the wires can be fed quickly, the high-speed extruding mechanism can better provide power when the wires are fed by, the flexible wire is not easy to bend; thereby making printing more efficient.

Description

Novel high-speed flexible material printing nozzle and 3D printing equipment thereof

Technical Field

The invention relates to the technical field of 3D printing, in particular to a novel high-speed flexible material printing nozzle and 3D printing equipment thereof.

Background

In the current 3D printer that can print flexible material, print at the in-process low-speed of printing, and the material that supports the printing is less, and all is the higher flexible material of hardness, can't satisfy the high production efficiency of industrial production, the demand of many material types, and when printing flexible material, the speed is very slow again.

Disclosure of Invention

The invention provides a novel high-speed flexible material printing nozzle and 3D printing equipment thereof, which can solve the technical problem that the conventional nozzle cannot print quickly in the process of printing a flexible material.

The technical scheme provided by the invention is as follows:

the utility model provides a novel high-speed flexible material prints shower nozzle, includes feeding area, radiating area and melts the district, feeding area, radiating area and melting the district and form the pay-off route in proper order, just melt the position in the end on pay-off route, be provided with high-speed extruding means on the feeding area, high-speed extruding means closes on the position department setting of radiating area, the radiating area with melt the district interval and set up, the radiating area with it passes through the connecting piece to melt the district and connects, the connecting piece is used for separation heat transfer extremely the radiating area.

In the technical scheme, the printing nozzle is divided into three areas which are connected to form a wire feeding path, so that the flexible silk material can be sequentially arranged along the feeding area, the heat dissipation area and the melting area when in use, finally the printing can be rapidly carried out, when in actual use, the high-speed extrusion mechanism on the feeding area is arranged close to the melting area, so that the feeding path is shortened, the wires can rapidly enter the heat dissipation area, the high-speed passing of the wire material ensures that the wire material does not stay in the heat dissipation area for too long time, the heat dissipation area and the melting area are arranged at intervals, and the heat dissipation area and the melting area are connected through the connecting piece, so that the heat of the melting area is not excessively transferred to the heat dissipation area, in the use process, the flexible wire materials are continuously cooled through the cooling area, so that the flexible wire materials cannot be heated, softened and conveyed in the cooling area, and the printing efficiency is higher.

Preferably, the feeding area comprises a wire feeding block, and a feeding channel is formed in the wire feeding block; the high-speed extrusion mechanism comprises a pair of wire feeding wheels, and the wire feeding wheels are arranged on the feeding channel;

the heat dissipation area is formed by the heat dissipation piece, the heat dissipation piece is detachably connected with the wire feeding block, a transition channel is arranged on the heat dissipation piece, and the wire feeding wheel is arranged at a position close to the transition channel;

the melting area is formed by the printing head, one end of the connecting piece is connected with the radiating piece, and the other end of the connecting piece is connected with the printing head.

In this technical scheme, through will sending the position setting of silk wheel setting near the radiating piece, not only shorten the route of sending a silk, this is to flexible wire, and this is easier through feedstock channel, avoids flexible wire to bend in feedstock channel and can't continue to carry. The position department that send the silk wheel to be close to the radiating piece simultaneously sets up, has shortened the distance between the silk wheel of sending for flexible wire rod enters into the transition passageway in the radiating piece more easily, thereby makes the conveying efficiency of wire rod accelerate, in order to promote printing efficiency.

Preferably, the inner side of one end of the transition channel close to the feeding channel is in a reversed frustum structure.

In this technical scheme, set to inverted circular truncated cone structure through the one end that is close to feedstock channel with transition channel to difficult the card that appears when making flexible wire rod enter into transition channel from feedstock channel puts, thereby makes flexible wire rod can carry more fast.

Preferably, the two wire feeding wheels are positioned on two sides of the feeding channel, and the distance between the two wire feeding wheels is smaller than the inner diameter of the feeding channel.

In this technical scheme, send the silk wheel to be located feedstock channel's both sides, and two distance that send between the silk wheel are less than feedstock channel's internal diameter to make when carrying flexible material, can be better provide the extrusion force, thereby better flexible wire rod of transport.

Preferably, the high-speed extrusion mechanism further comprises a driving device, and the two wire feeding wheels are connected with the driving device and used for driving the two wire feeding wheels to rotate oppositely.

In the technical scheme, the clearance between the outer circles of the wheels is smaller than the inner diameter of the first channel, and is also smaller than the diameter of the wire, the wire is rolled and pressed by the rotating wire feeding wheels, and the two wire feeding wheels apply forces in the same direction to the wire to push the wire to advance. The double contact area is brought by the driving force at the two sides of the wire, and the double wire feeding force can be transmitted to the wire under the condition of certain material limit shear stress. The fixed gear clearance can guarantee the gear and imbed the invariable degree of depth of wire rod, improves the lifting surface area of material shearing force to improve the wire feeding wheel and can apply force to the wire rod.

On the premise of ensuring that the material cannot be damaged by the wire feeding wheel, the wire feeding force which is as close to the damage limit of the material as possible is provided, and the purpose that the larger wire feeding force is applied to the wire is achieved.

Preferably, the driving means includes:

a drive motor;

the first gear is connected with the power output end of the driving device;

the first rotating shaft and the second rotating shaft are rotatably connected to the driving device, and the two wire feeding wheels are respectively arranged at one ends of the first rotating shaft and the second rotating shaft, which are far away from the driving device;

the second gear is arranged on the first rotating shaft and is meshed with the first gear;

and the two third gears are respectively arranged on the first rotating shaft and the second rotating shaft and are meshed.

In this technical scheme, increase motor speed through reduction gears, improve moment, be an economy and the small and exquisite selection of structure, reduced overall structure's inertia simultaneously, do benefit to the movement axis and drive the high-speed motion of shower nozzle. The increased torque is transmitted to the two parallel first rotating shafts and the second rotating shafts simultaneously through gear engagement or belt transmission. Wire feeding wheels with the same size are mounted on the first rotating shaft and the second rotating shaft, the two wire feeding wheels are opposite in rotation direction, and a printing wire penetrates through two wheel teeth and is parallel to the end faces of the wheels, so that the wire is better conveyed.

Preferably, the connecting piece is a throat pipe, the throat pipe is communicated with the printing head and the radiating piece, one end of the throat pipe is connected with the radiating piece, and the other end of the throat pipe is connected with the printing head.

In this technical scheme, the choke is connected the radiating piece and is beaten the printer head, and the different heat conductivities of the material of choke and the material of beating the printer head are worse to reduce heat transfer to the radiating piece on, thereby make going on that flexible wire rod can be better enter into beating printer head interior melting through the radiating piece and print.

Preferably, the throat pipe comprises an outer pipe and an inner pipe, the outer pipe is sleeved outside the inner pipe, and the inner side of one end, close to the transition channel, of the inner pipe is of an inverted frustum structure;

the outer tube is close to one end of the heat dissipation piece and is inserted into the heat dissipation piece, threads are formed in the outer wall of one end, far away from the heat dissipation piece, of the outer tube and used for being connected with the printing head, and a guide portion is extended from one end, far away from the heat dissipation piece, of the outer tube to the direction far away from the heat dissipation piece and used for guiding the outer tube to be connected with the printing head.

In this technical scheme, through the inside inverted round platform structure that sets to of the one end that is close to the radiating piece with the inner tube of choke, make things convenient for the wire rod to enter into in the inner tube from transition passageway. The throat pipe is arranged into an outer pipe and an inner pipe, the outer pipe is made of different materials, the inner pipe is used for conveying wires, the outer pipe is used for connecting the radiating piece and the printing head, and the outer pipe is made of low-thermal-conductivity materials such as titanium alloy and stainless steel.

Preferably, the inner diameter of the inner pipe is slightly smaller than that of the transition channel, and the inner pipe is a teflon pipe;

and/or;

the printing head comprises a heating block and a nozzle, one end of the nozzle, which is close to the heat dissipation piece, is connected with the outer pipe, a mounting hole is formed in the heating block, the nozzle portion is arranged in the mounting hole, the outer wall of the nozzle is detachably connected with the inner wall of the mounting hole, and one end of the nozzle, which is close to the heat dissipation piece, is connected with the outer pipe.

In this technical scheme, the internal diameter of inner tube is less than transition channel's internal diameter, just the inner tube is the teflon pipe, and the lubricity is bigger, consequently when carrying the wire rod, can be better with the wire rod laminating, and the wire rod is difficult for bending to make the wire rod can be better pass through the inner tube.

The utility model provides a 3D printing apparatus, includes any of the above-mentioned novel high-speed flexible material prints shower nozzle, first fan and second fan, first fan is connected with the radiating piece for to the radiating piece heat dissipation, the second fan is connected in the position that is located the nozzle, is used for right the discharge gate heat dissipation of nozzle.

Compared with the prior art, the novel high-speed flexible material printing nozzle and the 3D printing equipment thereof provided by the invention have the following beneficial effects:

1. according to the wire feeding device, the feeding area, the heat dissipation area and the melting area are sequentially arranged, the melting area is positioned at the tail end of the feeding path, and the high-speed extruding mechanism on the feeding area is arranged close to the heat dissipation area, so that the wire feeding path is shortened, the wire is rapidly fed, the high-speed extruding mechanism can better provide power when the wire is fed by the high-speed extruding mechanism due to the arrangement close to the heat dissipation area, and the flexible wire is not easy to bend; and the heat dissipation area separates the setting with melting the interval to make the heat that melts the district difficult for transmitting to the heat dissipation area, thereby make the temperature of heat dissipation area can be fine maintain on required temperature, do not influence the temperature rise in heat dissipation area, also can not soften flexible silk material, thereby make printing efficiency higher.

2. According to the invention, the wire feeding wheel is arranged on the feeding channel and is arranged close to the transition channel, so that the position of the wire feeding wheel is close to the heat radiating part, the wire feeding path is shortened, the flexible wire can well pass through the feeding channel and the transition channel, and the wire cannot be bent in the feeding channel and the transition channel, so that the wire can be rapidly conveyed, and rapid printing is realized.

3. The wire feeding device is provided with the two wire feeding wheels which are driven by the double drive, and the two wire feeding wheels apply forces in the same direction to the wire to push the wire to advance. The double contact area is brought by the driving force at the two sides of the wire, and the double wire feeding force can be transmitted to the wire under the condition of certain material limit shear stress. The gear clearance that is fixed can guarantee the invariable degree of depth of gear embedding wire rod, improves the lifting surface area of material shearing force to improve the wire feeding wheel and can exert force to the wire rod, make the wire rod speed at the in-process of carrying more accelerate, thereby the efficiency of high printing.

4. According to the invention, the inverted circular truncated cone structure is arranged at one end of the transition channel close to the feeding channel, so that wires can enter the transition channel along the feeding channel, the wires are more smooth in the conveying process, and meanwhile, the inverted circular truncated cone structure is arranged at the inner side of one end of the inner tube close to the transition channel, so that the wires after being pressed can well enter the inner tube, the wires entering the inner tube are not easy to bend, the conveying effect is better, the conveying speed of the wires can be improved, and high-speed printing is realized.

5. According to the invention, the throat pipe is arranged into the inner pipe and the outer pipe, and the inner pipe and the outer pipe are made of different materials, so that the outer pipe can be well connected with the heat radiating piece and the heating block in a practical process, and can be quickly disassembled when a nozzle needs to be replaced or the throat pipe needs to be replaced.

Drawings

The above features, technical features, advantages and implementations of a new high speed flexible material print head are further described in the following detailed description of preferred embodiments in a clearly understandable manner, in conjunction with the accompanying drawings.

FIG. 1 is a schematic view of an angular configuration of the present invention;

FIG. 2 is a schematic view of another angular configuration of the present invention;

FIG. 3 is a schematic diagram of a portion of the present invention;

FIG. 4 is a further angular configuration of FIG. 1;

FIG. 5 is a schematic view of the cross-sectional A-A configuration of FIG. 4;

fig. 6 is a schematic structural diagram of the present invention after the first fan and the second fan are installed.

The reference numbers illustrate: 100. a drive motor; 210. a first gear; 220. a second gear; 230. a third gear; 240. a wire feeding wheel; 250. a first rotating shaft; 260. a second rotating shaft; 300. a wire feeding block; 310. a feed inlet; 320. a feed channel; 400. a heat sink; 410. a transition passage; 500. a heating block; 510. heating the electrode; 600. a nozzle; 610. a melting zone; 700. a throat; 710. an outer tube; 720. an inner tube; 800. a first fan; 900. a second fan;

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

According to an embodiment provided by the invention, as shown in fig. 1-6, the novel high-speed flexible material printing nozzle comprises a feeding area, a heat dissipation area and a melting area 610, wherein the feeding area, the heat dissipation area and the melting area 610 sequentially form a feeding path, the melting area 610 is located at the tail end of the feeding path, a high-speed extrusion mechanism is arranged on the feeding area, the high-speed extrusion mechanism is arranged at a position close to the heat dissipation area, the heat dissipation area and the melting area 610 are arranged at intervals, the heat dissipation area and the melting area 610 are connected through a connecting piece, and the connecting piece is used for blocking heat from being transferred to the heat dissipation area.

Specifically, the feeding area comprises a wire feeding block 300, and a feeding channel 320 is formed on the wire feeding block 300; in specific implementation, the wire feeding block 300 is provided with a feeding hole 310 communicated with the feeding channel 320, so that a wire enters the feeding channel 320 from the feeding hole 310, the heat dissipation member 400 is provided with a transition channel 410, the heat dissipation member 400 is connected with the wire feeding block 300 so that the feeding channel 320 is communicated with the transition channel 410 to form a wire feeding channel, in specific implementation, the inner diameters of the feeding channel 320 and the transition channel 410 are consistent, and the feeding channel 320 and the transition channel 410 are coaxially arranged and used for conveying a flexible wire; the high-speed extrusion mechanism comprises a pair of wire feeding wheels 240, and the wire feeding wheels 240 are arranged on the feeding channel 320; a pair of wire feeding wheel 240 sets up on feed channel 320, the heat dissipation district is formed by heat dissipation piece 400, heat dissipation piece 400 and wire feeding piece 300 can dismantle and be connected, be provided with transition channel on heat dissipation piece 400, and wire feeding wheel 240 sets up near the position department of transition channel 410, wire feeding wheel 240 is close to transition channel 410 and sets up, the distance between a start point of sending a silk to transition channel 410 has been shortened, and the wire feeding wheel 240 of this moment makes the wire rod enter into transition channel 410 more easily to the power of flexible wire rod, when the internal diameter that can not appear sending a silk channel just allows the wire rod to pass through, the wire rod of overlength send a channel can increase frictional force greatly, the wire rod is difficult to pass through, melt district 610 and form by the printer head, the one end and the heat dissipation piece 400 of connecting.

If in order to improve the smoothness nature that the wire rod carried, do very big with the internal diameter of feedstock channel 320 and transition passageway 410, although frictional force can diminish, the wire rod can be bent in sending a passageway, also be difficult for passing through, thereby influence the speed of printing, and this problem of solution that the setting in this embodiment can be fine, the setting of current printer of comparison all sends a silk in the position department of feed inlet, and the creative setting of sending a silk wheel 240 on feedstock channel 320 of this embodiment, and the position setting that closes on radiating piece 400, make send a silk wheel 240 when carrying flexible silk material like this, can provide the sufficient power of flexible silk material, also can not make the crooked difficult transport of flexible silk material simultaneously, thereby make the carrying of flexible silk material faster with improvement printing efficiency.

Specifically, the connecting piece is a throat 700, the throat 700 is communicated with the printing head and the heat dissipation piece 400, the throat 700 is connected with the heat dissipation piece 400, and the throat 700 is connected with the printing head.

In specific implementation, the throat 700 includes an outer tube 710 and an inner tube 720, the outer tube is made of low thermal conductivity material such as titanium alloy or stainless steel, the outer tube 710 is sleeved outside the inner tube 720, and one end of the inner tube 720 close to the transition channel 410 is in an inverted frustum structure; the one end that outer tube 710 is close to radiating piece 400 is optical axis column structure, inserts and establishes in radiating piece 400, and the outer wall of the one end that radiating piece 400 was kept away from to outer tube 710 has seted up the screw thread for be connected with the printer head, and the one end that radiating piece 400 was kept away from to outer tube 710 extends the guide part to the direction of keeping away from radiating piece 400, is used for guiding outer tube 710 and beats printer head and is connected, and concrete implementation, outer tube 710 and printer head can be the screw thread and add the form of gluing and be connected, also can be connected modes such. The internal diameter of inner tube 720 slightly is less than transition channel 410's internal diameter, and inner tube 720 is the teflon pipe, and outer tube 710 is the relatively poor material of heat conductivity, and inner tube 720 is the teflon pipe, and the frictional force that makes between the pipe wall of inner tube 720 and the wire rod is less, and the reduction heat that simultaneously can also great degree is to the transmission of radiating piece 400 to better assurance that the wire rod that is located radiating piece 400 is difficult for melting, and the wire rod can not be curved because of melting, influences conveying efficiency. And the rapid conveying enables the stay time of the wire in the transition passage 410 and the inner tube 720 to be short, which is beneficial to the rapid conveying of the wire.

During specific implementation, the heat dissipation member 400 has a plurality of fins extending outward from the edge of a tubular structure for transferring heat on the heat dissipation member, so that the heat dissipation effect is better, which is not described in detail in this embodiment.

Specifically, it includes heating block 500 and nozzle 600 to beat printer head, the one end that nozzle 600 is close to radiating piece 400 is connected with outer tube 710, the mounting hole has been seted up on the heating block 500, nozzle 600 part is as for in the mounting hole, and the outer wall of nozzle 600 and the inner wall connection of mounting hole, during concrete implementation, a plurality of fixed orificess have been seted up on the heating block 500, the fixed orifices internal fixation has heating electrode 510, be used for heating the heating block, still be provided with temperature sensor on the heating block simultaneously, a temperature for real-time supervision heating block, just too much introduction has been in this embodiment.

During specific implementation, the whole throat 700 and the nozzle 600 are coaxially arranged due to the arrangement of the guide part, so that the situation that wires are not easy to enter the nozzle 600 to be heated and melted after the throat 700 and the nozzle 600 are connected is avoided. In this embodiment, make elongated nozzle 600 with the form of nozzle 600, be favorable to the wire rod to melt in nozzle 600 like this, elongated nozzle 600 can make the faster transport of wire rod simultaneously, does not influence melting of wire rod to can improve the speed of printing.

In another embodiment of the present invention, the end of the transition passage 410 near the feed passage 320 is in a rounded frustum configuration. The two wire feeding wheels 240 are located at both sides of the feeding passage 320, and the distance between the two wire feeding wheels 240 is smaller than the inner diameter of the feeding passage 320.

In this embodiment, the gap between the outer edges of the wire feeding wheels 240 is smaller than the diameter of the wire, and the gap between the outer edges of the two wire feeding wheels 240 is smaller than the inner diameter of the wire feeding channel, so that the wire feeding force can be provided during the rotation of the wire feeding wheels 240, and the wire can be well conveyed.

And set transition channel 410 to be the radius platform structure near the position of feedstock channel 320, conveniently when the wire rod is carried to transition channel 410 by feedstock channel 320, can pass through smoothly, not only the phenomenon of the card shell of not appearing bending, can also accelerate the conveying speed of flexible wire rod simultaneously.

In another embodiment of the present invention, the high-speed extrusion mechanism further comprises a driving device, and the two wire feeding wheels 240 are connected with the driving device for driving the two wire feeding wheels 240 to rotate towards each other.

Wherein, drive arrangement includes: the driving device comprises a driving motor 100, a first gear 210, a first rotating shaft 250, a second rotating shaft 260, a second gear 220 and two third gears 230, wherein the first gear 210 is connected with the power output end of the driving device;

the first rotating shaft 250 and the second rotating shaft 260 are rotatably connected to the driving device, and the two wire feeding wheels 240 are respectively arranged at one ends of the first rotating shaft 250 and the second rotating shaft 260, which are far away from the driving device; the second gear 220 is disposed on the first rotating shaft 250, and the second gear 220 is engaged with the first gear 210; the two third gears 230 are respectively disposed on the first rotating shaft 250 and the second rotating shaft 260, and the two third gears 230 are engaged, in this embodiment, the driving motor 100 is a motor with a speed reducer.

In this embodiment, the upper end and the side wall of the wire feeding block 300 extend in the direction of the driving motor 100 to form a protective cover, which covers the gear assembly to protect the first gear 210, the second gear 220, and the third gear 230.

In the using process, the wire rod is rolled and pressed by the rotating wire feeding wheels 240, and the two wire feeding wheels 240 apply forces in the same direction to the wire rod to push the wire rod to advance. The double contact area is brought by the driving force at the two sides of the wire, and the double wire feeding force can be transmitted to the wire under the condition of certain material limit shear stress. The fixed gear clearance can ensure the constant depth of the gear embedded into the wire, and the stress area of the shearing force of the material is increased, so that the force applied to the wire by the wire feeding wheel 240 is increased. Wire feeding wheel 240 with dual drives can convey wires faster and improve conveying speed when conveying the wires, so that the wires are not ready to melt in a wire feeding channel, and the wires can be guaranteed to be quickly conveyed to the position of nozzle 600 to be heated and melted

On the premise of ensuring that the material is not damaged by the wire feeding wheel 240, the wire feeding force which is as close to the damage limit of the material as possible is provided, so that the purpose of applying larger wire feeding force to the wire is achieved. For the situation that the wire can bear insufficient wire feeding force, a plurality of pairs of wire feeding wheels 240 can be adopted to increase the application area of the shearing force, and the upper limit of the wire feeding force is further improved.

The wire feeding wheel 240 is used for extruding the wire feeding from both sides, the material is extruded to the position of the nozzle 600, the heat dissipation piece 400 is connected with the wire feeding block 300 and the nozzle 600 at the lower end, the wire feeding passage is cooled to be below the softening temperature of the material, the material is prevented from softening, and the wire feeding force cannot be transmitted to the melting area 610. The inner diameter of the wire feeding passage is slightly larger than the diameter of the wire, so that better support can be provided, the wire is not easy to bend, and the flexible wire can not generate larger friction resistance with the path wall under the pressure expansion.

During high-speed printing, materials quickly pass through the melting area 610, but the time required for melting is constant (under the condition of constant temperature), and the temperature of the melting area 610 is limited by the tolerance temperature of the wires, so that the strategy of mainly adopting the lengthened melting area 610 and increasing the temperature as an auxiliary strategy is matched with the requirement of quickly passing the wires for melting. The extended melt zone 610 provides increased melt material that flows more readily under the influence of gravity. Uncontrolled spillage of material when there is a spray head standstill due to autonomous outflow requires a reduction in tip temperature and stored heat through the elongated nozzle 600 tip configuration, coupled with fan cooling and material withdrawal or mechanical switch means to quickly stop spillage of molten material.

The printing process comprises the following steps: the printing wire transmits a large wire feeding force to the wire under the bilateral driving of the wire feeding wheel 240 driven by the driving motor 100. The fixed clearance of the gears on the two sides enables the wire feeding wheel 240 to be embedded into the wire at a constant deeper depth, and the upper limit of wire feeding force which can be borne by the wire is improved. The wire is driven into the material heat sink 400 with a high wire feed force. The heat sink 400 ensures that heat transferred from the melting region 610 is dissipated in time, and the wire is not heated in advance to soften and bend the wire. At the same time, the thicker wires and the thinner material passages can effectively support the material from bending deformation under the action of pressure. The softened and crimped wire may block the wire feed path and not transmit wire feed force to the melt zone 610 to extrude material. The extended melting zone 610 ensures that the material has sufficient time to transfer heat to the interior of the wire as it passes quickly through the melting zone 610, sufficiently melting the wire. For fast fluid extrusion, higher extrusion forces than normal speeds are required, which is also a necessity for the previously increased extrusion forces.

A3D printing device comprises the novel high-speed flexible material printing nozzle, a first fan 800 and a second fan 900, wherein the first fan 800 is connected with a heat dissipation piece 400 and used for dissipating heat of the heat dissipation piece 400, and the second fan 900 is connected to a position located at a nozzle 600 and used for dissipating heat of a discharge hole of the nozzle 600.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a novel high-speed flexible material prints shower nozzle, includes feeding area, radiating area and melts the district, its characterized in that: the feeding area, the heat dissipation area and the melting area form a feeding path in sequence, the melting area is located at the tail end of the feeding path, a high-speed extruding mechanism is arranged on the feeding area, the high-speed extruding mechanism is close to the position of the heat dissipation area, the heat dissipation area and the melting area are arranged at intervals, the heat dissipation area is connected with the melting area through a connecting piece, and the connecting piece is used for blocking heat transfer to the heat dissipation area.

2. The novel high-speed flexible material printing nozzle according to claim 1, characterized in that:

the feeding area comprises a wire feeding block, and a feeding channel is formed in the wire feeding block; the high-speed extrusion mechanism comprises a pair of wire feeding wheels, and the wire feeding wheels are arranged on the feeding channel;

3. The novel high-speed flexible material printing nozzle according to claim 2, characterized in that: the inner side of one end of the transition channel, which is close to the feeding channel, is of an inverted frustum structure.

4. The novel high-speed flexible material printing nozzle according to claim 2, characterized in that: the two wire feeding wheels are positioned on two sides of the feeding channel, and the distance between the two wire feeding wheels is smaller than the inner diameter of the feeding channel.

5. The novel high-speed flexible material printing nozzle according to claim 4, characterized in that: the high-speed extrusion mechanism further comprises a driving device, and the two wire feeding wheels are connected with the driving device and used for driving the two wire feeding wheels to rotate in opposite directions.

6. The novel high-speed flexible material printing nozzle according to claim 5, characterized in that: the driving device includes:

a drive motor;

the first gear is connected with the power output end of the driving device;

7. The novel high-speed flexible material printing nozzle according to claim 2, characterized in that: the connecting piece is a throat which is communicated with the printing head and the radiating piece, one end of the throat is connected with the radiating piece, and the other end of the throat is connected with the printing head.

8. The novel high-speed flexible material printing nozzle according to claim 7, characterized in that: the throat pipe comprises an outer pipe and an inner pipe, the outer pipe is sleeved outside the inner pipe, and the inner side of one end, close to the transition channel, of the inner pipe is of an inverted frustum structure;

9. The novel high-speed flexible material printing nozzle of claim 8, wherein: the inner diameter of the inner pipe is slightly smaller than that of the transition channel, and the inner pipe is a Teflon pipe;

and/or;

10. The utility model provides a 3D printing apparatus which characterized in that: the novel high-speed flexible material printing nozzle comprises a novel high-speed flexible material printing nozzle body as claimed in any one of claims 1 to 10, a first fan and a second fan, wherein the first fan is connected with a heat dissipation member and used for dissipating heat of the heat dissipation member, and the second fan is connected at a position of a nozzle and used for dissipating heat of a discharge port of the nozzle.