CN220499687U - 3D printer and reinforcing cooling structure for 3D printer - Google Patents

Abstract

The embodiment of the utility model discloses a 3D printer and an enhanced cooling structure for the 3D printer, wherein the 3D printer comprises a frame, a printing platform and a moving mechanism, wherein the printing platform and the moving mechanism are arranged on the frame, and a printing head is connected to the moving mechanism; the printing head comprises a nozzle and a heating device, wherein after consumable materials are heated, the consumable materials extruded by the nozzle are extruded to the printing platform to print a three-dimensional model, the printing head further comprises a model radiating mechanism arranged on the frame or at the printing head, the model radiating mechanism comprises a wind source and a wind supply structure, the wind supply structure comprises an air outlet, the wind is discharged under the action of the wind source, the wind supply structure further comprises an enhanced cooling structure, so that the consumable materials extruded by the nozzle can be radiated by the wind source from the air outlet, the enhanced cooling structure can be utilized to radiate the consumable materials extruded by the nozzle, the radiating effect is better, the purpose of rapidly cooling the model is achieved, and the molding quality of the model is improved.

Description

3D printer and reinforcing cooling structure for 3D printer

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a 3D printer and an enhanced cooling structure for the 3D printer.

Background

The 3D printer is divided into a fused deposition type 3D printer and a photo-curing type 3D printer, wherein in the working process of the fused deposition type 3D printer, materials are discharged through a printing head to gradually form a model, and the process needs to be cooled to ensure the model to be formed. At present, as disclosed in CN201911344435.7, a 3D printer model cooling system uses a single fan to convey normal temperature air in the environment into an air duct, and then blows the air from a tuyere to blow on a printed model, so as to realize cooling of the model, however, the air output of the structure is smaller, the heat dissipation effect is poor, so that in the cooling process, the phenomenon that the model is not cooled locally in time easily occurs, thereby affecting the quality of the model, and even causing model collapse.

Disclosure of Invention

In view of the above, the utility model provides a 3D printer and an enhanced cooling structure for the 3D printer, so as to solve the problem that the cooling effect is poor, and the phenomenon of untimely local cooling of a model is easy to occur in the cooling process, thereby influencing the quality of the model and even causing collapse of the model.

In a first aspect, an embodiment of the present utility model provides a 3D printer, including a frame, a printing platform and a motion mechanism that are disposed on the frame, where the motion mechanism is connected with a print head; the printing head comprises a nozzle and a heating device, wherein the nozzle is used for extruding consumable materials to the printing platform for printing a three-dimensional model after the consumable materials are heated, the printing head further comprises a model heat dissipation mechanism arranged on the frame or at the printing head, the model heat dissipation mechanism comprises a wind source and a wind supply structure, the wind supply structure comprises an air outlet, the wind is discharged under the action of the wind source, and the wind supply structure further comprises an enhanced cooling structure.

Optionally, the enhanced cooling structure includes a tuyere including a blast channel including at least two air outlets of different heights.

Optionally, the enhanced cooling structure comprises a tuyere comprising an air suction channel, the air suction channel comprises the air inlet, and an air suction negative pressure area of the air inlet is positioned at the nozzle.

Optionally, the air supply channel comprises a main channel arranged in the air nozzle and positioned at the upstream and an air outlet channel arranged in the air nozzle and positioned at the downstream, and the main channel is communicated with the air outlet channel; the air outlet channel corresponds to the air outlet;

the main channels are respectively communicated with air inlet ends of at least two air outlet channels, and the air outlets are arranged at air outlet ends of the corresponding air outlet channels;

the air supply channel further comprises an air inlet channel, and the air inlet channel is communicated with the air source and the main channel;

the number of the air inlet channels is greater than or equal to the number of the air outlet channels;

the air outlet direction of the air outlet channel faces the nozzle, and the cross section of the air outlet channel is reduced along the direction from the air inlet end to the air outlet end;

the tuyere comprises a tuyere housing comprising a first nozzle channel to accommodate the nozzle; the main channel is a single annular main channel, and the single annular main channel is communicated with the air inlet channel and the air outlet channel; the single annular main channel surrounds the first nozzle channel.

Optionally, the height refers to a height when the air outlet direction of the air outlet intersects with the target area;

the at least two air outlets with different heights comprise air outlets with opposite positions or air outlets with arrayed positions;

the height difference of the air outlets with different heights is between 0.5 and 1.5 mm;

wherein the target area is a central axis of the nozzle.

Optionally, the enhanced cooling structure further comprises a refrigeration assembly;

the refrigerating assembly comprises a refrigerator and a refrigerating connecting piece, the refrigerating connecting piece comprises a refrigerating cavity, and the refrigerating cavity is communicated with the air source and the air inlet channel; a refrigeration component of the refrigerator acts on the refrigeration cavity to cool the gas flowing through the refrigeration cavity;

the refrigerator is a semiconductor refrigerator;

the refrigerating assembly further comprises a first air conveying pipeline and a second air conveying pipeline, the refrigerating cavity is communicated with the air inlet channel through the first air conveying pipeline, the refrigerating cavity is also communicated with the air source through the second air conveying pipeline, the first air conveying pipeline is positioned on one side of the refrigerating cavity, and the second air conveying pipeline is positioned on the other side of the refrigerating cavity;

The first air conveying pipeline comprises a split joint and an air guide pipe;

the branch connectors comprise a main pipe and branch pipes communicated with the main pipe, the number of the branch pipes is the same as that of the air inlet channels, and the branch pipes are communicated with the corresponding air inlet channels;

the main pipe is communicated with the refrigerating cavity through the air guide pipe;

the printhead further includes a first nozzle link and a first housing;

the nozzle, the first nozzle connecting piece and the shunt joint are positioned in the first shell, and the nozzle is connected with the first nozzle connecting piece; the first nozzle connection member protrudes from an upper portion of the first housing, and the nozzle protrudes from a lower portion of the first housing;

the first nozzle channel through which the nozzle passes, the main channel, the air inlet channel and the air outlet channel are all arranged around the first nozzle channel.

Optionally, the air-blowing device further comprises an air-blowing channel, wherein the air-blowing channel comprises the air outlet, and the air outlet faces the nozzle; the air inlet and the air outlet are correspondingly arranged and are positioned on different sides of the nozzle;

wherein the air outlet is positioned in the negative pressure area of the air inlet; the air outlet is opposite to the air inlet, and the nozzle is positioned between the air outlet and the air inlet; an air inlet of the air blowing channel is communicated with an air blowing end of the air source, and an air outlet of the air suction channel is communicated with an air suction end of the air source;

The heights of the air inlet and the air outlet are the same.

Optionally, the air blowing channel comprises a first air blowing section and a second air blowing section communicated with the first air blowing section, the first air suction channel comprises a first air suction section and a second air suction section, and the second air blowing section and the second air suction section incline towards the direction close to the printing head;

the cross section of the second air blowing section gradually decreases along a first direction, and the first direction is the direction from one end of the second air blowing section communicated with the first air blowing section to one end far away from the first air blowing section;

the cross section of the second air suction section gradually decreases along a second direction, and the second direction is the direction from one end of the second air suction section, which is communicated with the first air suction section, to one end of the second air suction section, which is far away from the first air suction section;

the 3D printer further comprises an air suction connecting pipe and an air blowing connecting pipe, wherein the air blowing end is communicated with the first air blowing section through the air blowing connecting pipe, and the air suction end is communicated with the first air suction section through the air suction connecting pipe.

Optionally, the tuyere comprises a tuyere housing comprising a second nozzle channel to accommodate the nozzle;

The printhead further includes a second nozzle link and a second housing;

the nozzle and the second nozzle connecting piece are positioned in the shell, and the nozzle is connected with the second nozzle connecting piece; the second nozzle connecting piece extends from the upper part of the second shell, and the nozzle extends from the lower part of the second shell;

the air nozzle is characterized in that a second nozzle channel for the nozzle to pass through is further arranged on the air nozzle, the air suction channel is positioned on one side of the second nozzle channel, and the air blowing channel is positioned on the other side of the second nozzle channel.

In a second aspect, an embodiment of the present utility model provides an enhanced cooling structure for a 3D printer, including a tuyere, where the tuyere includes an air supply channel, and the air supply channel includes at least two air outlets with different heights.

According to the 3D printer and the enhanced cooling structure for the 3D printer, provided by the embodiment of the utility model, not only can the air blown from the air outlet by the air source be utilized to dissipate heat, but also the consumable extruded by the nozzle can be utilized to dissipate heat by the enhanced cooling structure, so that the heat dissipation effect is better, the purpose of quickly cooling a model is achieved, and the molding quality of the model is further improved.

Drawings

The following drawings of the present utility model are included as part of the description of embodiments of the utility model. The drawings illustrate embodiments of the utility model and their description to explain the principles of the utility model.

In the accompanying drawings:

FIG. 1 is a front view of an enhanced cooling structure for a 3D printer according to an alternative embodiment of the present utility model;

FIG. 2 is a perspective view of an enhanced cooling structure for a 3D printer according to an alternative embodiment of the present utility model;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is an exploded view of a printhead and a tuyere according to an alternative embodiment of the present utility model;

FIG. 5 is a perspective view of a tuyere according to an alternative embodiment of the present utility model;

FIG. 6 is a partial cross-sectional view of FIG. 5;

FIG. 7 is a top perspective view of FIG. 5;

FIG. 8 is a side view of FIG. 5;

FIG. 9 is a cross-sectional view taken along the direction A-A of FIG. 8;

fig. 10 is a front view of fig. 5;

FIG. 11 is a cross-sectional view in the direction B-B of FIG. 8;

FIG. 12 is a top view of FIG. 5;

FIG. 13 is a block diagram of a tuyere according to another alternative embodiment of the present utility model;

FIG. 14 is a front view of an enhanced cooling structure for a 3D printer according to another alternative embodiment of the present utility model;

FIG. 15 is a perspective view of an enhanced cooling structure for a 3D printer according to another alternative embodiment of the present utility model;

FIG. 16 is an exploded view of FIG. 15;

FIG. 17 is an exploded view of a printhead and a tuyere according to another alternative embodiment of the present utility model;

FIG. 18 is a perspective view of a tuyere according to an alternative embodiment of the present utility model;

FIG. 19 is a partial cross-sectional view of FIG. 18;

FIG. 20 is a top view of FIG. 18;

FIG. 21 is a top perspective view of FIG. 18;

FIG. 22 is a side view of FIG. 18;

FIG. 23 is a cross-sectional view taken in the direction A-A of FIG. 22;

fig. 24 is a front view of fig. 18;

fig. 25 is a sectional view in the direction B-B of fig. 24.

Reference numerals illustrate:

1-tuyere, 101-air supply channel, 1011-air intake channel, 1012-main channel, 1013-air outlet channel, 1014-air outlet, 102-air supply channel, 1021-first air supply section, 103-second air supply section, 103-air suction channel, 1031-first air suction section, 1032-second air suction section, 1033-air intake, 2-print head, 201-first housing, 202-first nozzle connection piece, 203-nozzle, 204-second housing, 205-second nozzle connection piece, 3-first air supply line, 301-air guide pipe, 302-split joint, 3021-main pipe, 3022-branch pipe, 4-connection pipe, 5-refrigerator, 501-refrigeration part, 6-refrigeration connection piece, 601-refrigeration cavity, 7-second air supply line, 8-air source, 9-first nozzle channel, 10-air supply connection pipe, 11-air suction connection pipe, 12-connection part, 13-second nozzle channel.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.

In a first aspect, as shown in fig. 1 to 6 and fig. 14 to 25, an embodiment of the present utility model provides a 3D printer, including a frame, a printing platform and a movement mechanism, wherein the printing platform and the movement mechanism are disposed on the frame, and the movement mechanism is connected with a printing head 2; the printing head 2 comprises a nozzle 203 and a heating device for heating consumable materials, extruding the consumable materials from the nozzle 203 to a printing platform for printing a three-dimensional model, and further comprises a model heat dissipation mechanism arranged on a frame or at the printing head 203, wherein the model heat dissipation mechanism comprises a wind source 8 and a wind supply structure, the wind supply structure comprises a wind outlet 1014 for discharging wind under the action of the wind source 8, and the wind supply structure further comprises an enhanced cooling structure.

The printing platform, the moving mechanism and the heating device can adopt the existing components with corresponding functions, and the embodiment is not strictly limited. The consumable may be a linear consumable. The air source can adopt an air blower, and the air blower has the advantages of small volume, light weight and high bearing capacity.

In specific application, the motion mechanism drives the printing head 2 to move, and simultaneously the heating device heats the consumable, so that the consumable is in a molten state, and then the consumable is extruded by the nozzle 203, and the consumable extruded by the nozzle 203 is cooled by the wind blown out from the air outlet through the wind source 8 and the enhanced cooling structure, so that the cooling effect is better, the purpose of quickly cooling the model is achieved, and the molding quality of the model is improved.

Specifically, in one implementation, as shown in fig. 6 and 10, the enhanced cooling structure includes a tuyere 1, the tuyere 1 includes a blast channel 101, and the blast channel 101 includes at least two air outlets 1014 having different heights.

In a specific application, the tuyere 1 can be made of a metal material, so that the rigidity and the service life of the tuyere 1 are improved.

The air supply channel 101 on the air nozzle 1 is provided with at least two air outlets 1014 with different heights, so that the quantity of the air outlets 1014 is increased, the air output is further improved, the heat dissipation effect is enhanced, the air output by the air outlets 1014 is different in height, the condition that the air output by the air outlets 1014 is interfered with each other is avoided, the heat dissipation effect is better, the heat dissipation effect of the air nozzle 1 on consumable materials sprayed out by the printing head 2 is better, the purpose of quickly cooling a model is achieved, and the molding quality of the model is further improved.

The at least two air outlets 1014 with different heights may be a part of the air outlets 1014 with different heights, and another part of the air outlets 1014 with the same height, or may be all the air outlets 1014 with different heights. For example, the number of the air outlets 1014 is four, and the number of the air outlets is a first air outlet, a second air outlet, a third air outlet and a fourth air outlet respectively, wherein the first air outlet is opposite to the second air outlet, and the third air outlet and the fourth air outlet are opposite to each other.

Specifically, as shown in fig. 5 to 11, the air supply duct 101 includes a main duct 1012 provided upstream in the tuyere 1 and an air outlet duct 1013 provided downstream in the tuyere 1, and the main duct 1012 communicates with the air outlet duct 1013; the air outlet channel 1013 corresponds to the air outlet 1014; the main channels 1012 are respectively communicated with the air inlet ends of at least two air outlet channels 1013, and the air outlets 1014 are arranged at the air outlet ends of the corresponding air outlet channels 1013.

The air outlet passages 1013 correspond to the air outlets 1014, which means that each air outlet passage 1013 is provided with one air outlet 1014.

The main channel 1012 is connected with the air outlet channels 1013, so that wind energy conveyed by the main channel 1012 can be simultaneously conveyed to each air outlet channel 1013, conveying efficiency is improved, and heat dissipation efficiency is also improved. And the air outlet channel 1013 is capable of directing air from the main channel 1012 of the tuyere 1 to below the print head 2, thereby functioning as a drainage.

As shown in fig. 1 to 11, the air supply duct 101 further includes an air intake duct 1011, and the air intake duct 1011 connects the ventilation source 8 and the main duct 1012, so that the air of the air source 8 can be introduced into the main duct 1012 and then delivered to each of the air outlet ducts 1013 through the main duct 1012.

In an embodiment, the number of the air inlet channels 1011 is at least two, so that the cooling air can be simultaneously conveyed to the main channels 1012 by multiple channels, thereby greatly improving the air quantity of the main channels 1012 and further improving the efficiency of conveying the air to the main channels 1012.

The number of the air inlet channels 1011 is greater than or equal to that of the air outlet channels 1013, so that air can be supplied to the main channels 1012 through multiple channels, and the air supply efficiency is improved; the multi-channel air outlet can be realized, so that the heat dissipation effect is improved.

Further, as shown in fig. 5 to 6 and fig. 8 to 10, the air outlet direction of the air outlet channel 1013 faces the nozzle 203, so that the air can be intensively guided to the lower part of the printing head 2, and the consumable extruded by the nozzle 203 can be timely cooled, so that the model is partially cooled; and the cross section of the air outlet channel 1013 is reduced along the direction from the air inlet end to the air outlet end, so that the air pressure near the air outlet 1014 is increased, and the air output from the air outlet 1014 is rapid and uniform, and the heat dissipation effect is better.

As shown in fig. 4 to 15, the tuyere 1 includes a tuyere housing including a first nozzle channel 9 to accommodate the nozzle 203; the main channel 1012 is a single annular main channel, and the single annular main channel is communicated with the air inlet channel 1011 and the air outlet channel 1013; a single annular main channel surrounds the first nozzle channel 9.

The main channel 1012 is a single annular main channel so as to be convenient for communication with each of the air intake channel 1011 and the air outlet channel 1013, and the single annular main channel surrounds the first nozzle channel 9 to reduce the space occupied by the main channel 1012, thereby reducing the overall size of the tuyere 1. Meanwhile, the wind energy entering from the air inlet channel 1011 can be mixed to a certain extent, so that the flow velocity, the flow rate and the like of the wind exiting from the different air outlet channels 1013 are not excessively different.

The nozzle 203 passes through the first nozzle channel 9 arranged on the tuyere 1, so that the nozzle 203 and the tuyere 1 form a whole, the structure is more compact, the whole volume is reduced, and the occupied space is reduced.

Further, as shown in fig. 5 to 6, and fig. 8 to 10, the height is a height indicating when the air outlet direction of the air port 1014 intersects with the target area; the at least two air outlets 1014 with different heights comprise air outlets 1014 with opposite positions or air outlets 1014 with array arrangement positions; the height difference L of at least two air outlets 1014 with different heights is between 0.5 and 1.5 mm; wherein the target area is the central axis of nozzle 203.

In one embodiment, the at least two air outlets 1014 with different heights include the air outlets 1014 with opposite positions, so as to improve the air output, reduce the dead space of the wind shielding, and enhance the heat dissipation effect. In another embodiment, the at least two air outlets 1014 with different heights include the air outlets 1014 arranged in an array, so that the number of the air outlets 1014 is further increased, and the heat dissipation effect is better.

The height of the air outlet 1014 is determined as the height when the air outlet direction of the air outlet 1014 intersects with the target area, so that the air outlet air path intersects with the central axis of the nozzle 203, and the air blown out by the air outlet 1014 is ensured to be sent to the consumable extruded by the nozzle 203. The air outlet direction may be along the central line direction of the air outlet, or the extending direction of a certain inner side wall of the air outlet, so long as each air outlet determines the air direction according to the same definition.

The difference in height L of the air outlets 1014 with different heights is between 0.5 and 1.5mm, so that the situation that the heat dissipation effect is affected due to mutual interference of wind output by the two opposite air outlets 1014 can be avoided, enough air quantity can be ensured to cool the consumable extruded by the printing head 2, wind forces received by two opposite sides of the consumable are similar, and deformation is avoided when the consumable is cooled and solidified. For example, the number of the air outlets 1014 is four, two air outlets 1014 are disposed opposite to each other, the other two air outlets 1014 are disposed opposite to each other, and the height difference between the two opposite air outlets 1014 is 1mm.

Further, as shown in fig. 1-4, the enhanced cooling structure further includes a refrigeration assembly; the refrigerating assembly comprises a refrigerator 5 and a refrigerating connecting piece 6, the refrigerating connecting piece 6 comprises a refrigerating cavity 601, and the refrigerating cavity 601 is communicated with a wind source 8 and an air inlet channel 1011; the refrigerating part 501 of the refrigerator 5 acts on the refrigerating chamber 601 to cool the gas flowing through the refrigerating chamber; the refrigerator 5 is a semiconductor refrigerator.

The air output by the air source 8 enters the refrigerating cavity 601 through the second air conveying pipeline 7, the refrigerating component 501 in the refrigerating cavity 601 cools the air, then the cooled cooling air is conveyed to the air inlet channels 1011 through the first air conveying pipeline 3, flows into the main channel 1012 through the air inlet channels 1011, finally flows out to the lower part of the printing head 2 through the air outlet channels 1013, and therefore the cooling air cooled through the refrigerator 5 can further improve the heat dissipation effect on consumable materials sprayed out of the printing head 2, and the consumable materials sprayed out of the printing head 2 are cooled more rapidly.

The semiconductor refrigerator has no noise, no abrasion, long service life and high reliability when in operation, and no refrigerant is used, so the semiconductor refrigerator has no leakage and no pollution to the environment. The blower has the advantages of small volume, light weight and high bearing capacity.

Wherein, refrigeration subassembly still includes first defeated wind pipeline 3 and second defeated wind pipeline 7, and refrigeration chamber 601 is through first defeated wind pipeline 3 and air inlet channel 1011 intercommunication, and refrigeration chamber 601 still communicates with wind regime 8 through second defeated wind pipeline 7, and first defeated wind pipeline 3 is located one side of refrigeration chamber 601, and second defeated wind pipeline 7 is located the opposite side of refrigeration chamber 601.

The first air delivery pipeline 3 is located at one side of the refrigerating cavity 601, the second air delivery pipeline 7 is located at the other side of the refrigerating cavity 601, so that wind energy output by the wind source 8 can flow from one side of the refrigerating cavity 601 to the other side, and the wind path of the wind in the refrigerating cavity 601 is increased, so that the refrigerating part 501 of the refrigerator 5 can sufficiently cool the wind.

In specific application, a connecting conduit 4 which is curved is further arranged between the first air conveying pipeline 3 and the refrigerating cavity 601, so that parts on the refrigerator 5 are avoided, the situation that the first air conveying pipeline 3 is excessively curved to cause occlusion is avoided, and the connection of the first air conveying pipeline 3 and the refrigerating cavity 601 is also facilitated.

Further, as shown in fig. 4, the first air delivery pipeline 3 includes a split joint 302 and an air guide pipe 301; the split joint 302 comprises a main pipe 3021 and branch pipes 3022 communicated with the main pipe 3021, the number of the branch pipes 3022 is the same as that of the air inlet channels 1011, and the branch pipes 3022 are communicated with the corresponding air inlet channels 1011; the manifold 3021 communicates with the refrigeration cavity 601 via the air guide duct 301.

The air in the air guide pipes 301 is respectively and simultaneously conveyed to the air inlet channels 1011 through the branch pipes 3022 of the split joint 302, so that one air guide pipe 301 is not required to be configured for each air inlet channel 1011, the use quantity of the air guide pipes 301 is reduced, and the cost is saved.

Further, as shown in fig. 4 to 6, the printhead 2 further includes a first nozzle connection member 202 and a first housing 201; the nozzle 203, the first nozzle connector 202 and the shunt joint 302 are positioned in the first shell, and the nozzle 203 is connected with the first nozzle connector 202; the first nozzle link 202 protrudes from an upper portion of the first housing 201, and the nozzle 203 protrudes from a lower portion of the first housing 201; the first nozzle passage 9 through which the nozzle 203 passes, the main passage 1012, the air intake passage 1011, and the air outlet passage 1013 are all provided around the first nozzle passage 9.

The first housing 201 may be assembled by two sub-housings, so that the first housing 201 may be easily disassembled and assembled, so as to facilitate maintenance and replacement of various components in the first housing 201 by a worker. The first nozzle connecting member 202 may be a conventional structure with a connecting function, and the present embodiment is not limited thereto. The first nozzle connector 202 is used for connecting the nozzle with a moving mechanism of the 3D printer, so that the moving mechanism drives the nozzle to move to complete the printing action.

The split joint 302 is arranged in the first shell 201, so that the split joint 302 can be conveniently connected with the air inlet channel 1011, the split joint 302 can be protected by the first shell 201, and the service life of the split joint 302 is prolonged. The first nozzle link 202 protrudes from an upper portion of the first housing 201, thereby facilitating assembly of the first nozzle link 202 with the moving mechanism. The first nozzle 203 protrudes from the lower portion of the first housing 201, so that the first nozzle 203 can smoothly eject the consumable onto the printing platform, and interference of the first housing 201 is avoided.

The first nozzle 203 passes through the first nozzle channel 9 arranged on the tuyere 1, so that the first nozzle channel 9 and the nozzle 203 form a whole, the structure is more compact, the whole volume is reduced, and the occupied space is reduced. The primary channel 1012 is arranged around the first nozzle channel 9 to reduce the space occupied by the primary channel 1012 and thus the overall size of the tuyere 1. All the air outlet channels 1013 are arranged around the first nozzle channel 9, so that not only can the arrangement of the air outlet channels 1013 be facilitated for workers, but also the length of each air outlet channel 1013 can be shortened, thereby reducing the conveying path of cooling air and improving the heat dissipation efficiency. All the air inlet channels 1011 are arranged around the first nozzle channel 9, so that the communication between each air inlet channel 1011 and the main channel 1012 can be conveniently realized, and the cooling air is simultaneously conveyed to each part conveyed by the main channel 1012, thereby improving the air supply efficiency.

In another implementation, as shown in fig. 18-25, the enhanced cooling structure further includes a blower channel 102, the blower channel 102 including an air outlet 1014, the air outlet 1014 facing the nozzle 203; the air inlet 1033 is disposed corresponding to the air outlet 1014 and is located at different sides of the nozzle 203; wherein the air outlet 1014 is located within the negative pressure region of the air inlet 1033.

The air outlet 1014 is utilized to convey air to one side of the nozzle 203, so that the local air pressure at the nozzle 203 is improved, and meanwhile, the air inlet 1033 is utilized to suck air to the other sides of the nozzle 203, so that the local air pressure at the nozzle 203 is reduced, a negative pressure area is formed, an air pressure difference is generated below the printing head 2, a large and fast flowing air flow can be generated, the air nozzle 1 has a better heat dissipation effect on consumable materials sprayed out of the printing head 2, the purpose of fast cooling a model is achieved, and the molding quality of the model is improved.

The air outlet 1014 is arranged opposite to the air inlet 1033, and the nozzle 203 is arranged between the air outlet 1014 and the air inlet 1033, so that the air pressure on one side of the printing head 2 is high, the air pressure on the other side is low, and the generated air flow can pass through the lower side of the printing head 2, so that the consumable material sprayed out of the printing head 2 can be sufficiently cooled, and the heat dissipation effect is improved.

As shown in fig. 14 to 17, the air inlet of the air blowing channel 102 communicates with the air blowing end of the air source 8, and the air outlet of the air suction channel 103 communicates with the air suction end of the air source 8.

The air source 8 can have the functions of blowing and air suction at the same time, that is, it can send air to the blowing channel 102, and can suck air below the printing head 2 through the air suction channel 1022, so that the number of components can be reduced, the cost is reduced, and the structure is more compact. More importantly, by the arrangement, the nozzle is the only open point in the airflow loop, so that larger suction force can be generated at the open point, namely the position of the negative pressure area, to drive more air to flow at the nozzle, and a better heat dissipation effect is achieved. In addition, the path of the air flow loop is shorter, so that the flow speed is faster, the suction force is stronger, and the air quantity is larger.

The air inlet 1033 and the air outlet 1014 have the same height, thereby shortening the flow path of the air flow and making the heat dissipation effect better.

Further, as shown in fig. 18 to 25, the air blowing channel 102 includes a first air blowing section 1021 and a second air blowing section 1022 communicating with the first air blowing section 1021, and the air suction channel 103 includes a first air suction section 1031 and a second air suction section 1032, and the second air blowing section 1022 and the second air suction section 1032 are inclined in a direction approaching the printhead 2.

The second air blowing section 1022 is inclined in a direction approaching the print head 2, so that the air can be intensively guided to the lower side of the spray head 2, and the model part can be cooled in time. The second section 1032 that induced drafts inclines to the direction that is close to shower nozzle 2 to can make the air to printing head 2 below suck, with the section 1022 that bloies to the cooperation, thereby make the below of printing head 2 produce the air pressure difference, thereby can produce great and quick air current that flows, make the radiating effect better, reach the purpose to the model rapid cooling, and then improve model shaping quality.

The cross section of the second air blowing section 1022 is gradually reduced along a first direction, which is a direction from an end of the second air blowing section 1022 communicating with the first air blowing section 1021 to an end far from the first air blowing section 1021.

The cross section of the second air blowing section 1022 gradually decreases in the first direction, so that the air pressure near the air outlet of the second air blowing section 1022 increases, and the air output from the second air blowing section 1022 is made uniform rapidly, so that the air pressure below the print head 2 can be increased rapidly.

The cross section of the second suction section 1032 gradually decreases in the second direction, which is a direction from an end of the second suction section 1032 communicating with the first suction section 1031 to an end distant from the first suction section 1031.

The cross section of the second suction section 1032 gradually decreases along the second direction, so that the situation that the air flow sucked by the second suction section 1032 is too fast, and the air pressure difference below the printing head 2 is too large to cause the air flow to be too large, so that the consumable ejected by the nozzle 2 is deformed is avoided.

As shown in fig. 14 to 16, the 3D printer further includes an air suction connection pipe 11 and an air blowing connection pipe 10, the air blowing end is communicated with the first air blowing section 1021 through the air blowing connection pipe 10, and the air suction end is communicated with the first air suction section 1031 through the air suction connection pipe 11.

Wherein, the air suction connecting pipe 11 and the air blowing connecting pipe 10 can adopt hoses, so that the air suction connecting pipe 11 and the air blowing connecting pipe 10 can be bent, and other parts are avoided, so that the air suction connecting pipe 11 and the air blowing connecting pipe 10 are conveniently arranged.

Further, as shown in fig. 14 to 17, a connecting pipe 4 in a curved shape is also provided between the blowing connecting pipe 10 and the blowing end of the wind source 8, so as to avoid the parts of the wind source 8, so as to avoid the blocking condition caused by excessive bending of the blowing connecting pipe 10, and also facilitate the connection of the blowing connecting pipe 10 and the blowing end. The suction connection pipe 11 is connected with the suction end through the connection part 12, thereby facilitating connection operation and improving connection stability.

Further, as shown in fig. 17 to 25, the tuyere 1 includes a tuyere housing including a second nozzle channel 13 to accommodate the nozzle 203; the printhead 2 further comprises a second nozzle connection 205 and a second housing 204; the nozzle 203 and the second nozzle connector 205 are positioned in the shell, and the nozzle 203 is connected with the second nozzle connector 205; the second nozzle link 205 protrudes from an upper portion of the second housing 204, and the nozzle 203 protrudes from a lower portion of the second housing 204.

The second nozzle link 205 protrudes from an upper portion of the second housing 204, thereby facilitating assembly of the second nozzle link 205 with the moving mechanism. The nozzle 203 protrudes from the lower portion of the second housing 204, so that the nozzle 203 can smoothly eject the consumable onto the printing platform, and interference from the second housing 204 is avoided.

The tuyere 1 is further provided with a second nozzle channel 13 for the nozzle 203 to pass through, the air suction channel 103 is positioned on one side of the second nozzle channel 13, and the air blowing channel 102 is positioned on the other side of the second nozzle channel 13.

The nozzle 203 passes through the second nozzle channel 13 arranged on the tuyere 1, so that the nozzle 203 and the nozzle 203 form a whole, the structure is more compact, the whole volume is reduced, and the occupied space is reduced. The primary channel 1012 is disposed around the secondary nozzle channel 13 to reduce the space occupied by the primary channel 1012 and thus the overall size of the tuyere 1. The air suction channel 1022 is located at one side of the second nozzle channel 13, and the air blowing channel 102 is located at the other side of the second nozzle channel 13, that is, the air blowing channel 102 is opposite to the air suction channel 1022, so that air pressure on one side below the spray head 2 is high, air pressure on the other side is low, and air flow generated by the air suction channel can pass through below the spray head 2, so that consumable materials sprayed out of the spray head 2 can be sufficiently cooled, and the heat dissipation effect is improved.

In the embodiment of the application, the cooling part can be combined with negative pressure circulation, so that the effect is better.

In one embodiment, the application provides a 3D printer, including a frame, a printing platform and a movement mechanism, wherein the printing platform and the movement mechanism are arranged on the frame, and the movement mechanism is connected with a printing head 2; the printing head 2 comprises a nozzle 203 and a heating device for heating consumable materials, extruding the consumable materials to a printing platform for printing a three-dimensional model, and further comprises a model heat dissipation mechanism arranged on a frame or at the printing head 2, wherein the model heat dissipation mechanism comprises a wind source 8 and a wind supply structure, the wind supply structure comprises a wind outlet 1014 for discharging wind under the action of the wind source 8, and the wind supply structure further comprises an enhanced cooling structure.

Wherein, the enhanced cooling structure includes a tuyere 1, the tuyere 1 includes an air supply channel 101, and the air supply channel 101 includes at least two air outlets 1014 having different heights.

Wherein the enhanced cooling structure comprises a tuyere 1, the tuyere 1 comprises an air suction channel 103, and the air suction channel 103

The suction plenum comprising the inlet 1033, the inlet 1033 is located at the nozzle 203.

The air supply channel 101 comprises a main channel 1012 arranged in the air nozzle 1 and positioned at the upstream and an air outlet channel 1013 arranged in the air nozzle 1 and positioned at the downstream, and the main channel 102 is communicated with the air outlet channel 1013; the air outlet channel 1013 corresponds to the air outlet 1014;

The main channels 1012 are respectively communicated with the air inlet ends of at least two air outlet channels 1013, and the air outlets 1014 are arranged at the air outlet ends of the corresponding air outlet channels 1013;

the air supply channel 101 further comprises an air inlet channel 1011, and the air inlet channel 1011 is connected with the ventilation source 8 and the main channel 1012;

the number of air intake channels 1011 is greater than or equal to the number of air outlet channels 1013;

the air outlet direction of the air outlet channel 1013 faces the nozzle, and the cross section of the air outlet channel 1013 is reduced along the direction from the air inlet end to the air outlet end;

the tuyere 1 comprises a tuyere housing comprising a first nozzle channel 9 to accommodate a nozzle 203; the main channel 1012 is a single annular main channel, and the single annular main channel is communicated with the air inlet channel 1011 and the air outlet channel 1013; a single annular main channel surrounds the first nozzle channel 9.

Wherein the height is the height indicating when the air outlet direction of the air port 1014 intersects the target area;

the at least two air outlets 1014 with different heights comprise air outlets 1014 with opposite positions or air outlets 1014 with array arrangement positions;

the height difference of the at least two air outlets 1014 with different heights is between 0.5 and 1.5 mm;

wherein the target area is the central axis of the nozzle.

Wherein the enhanced cooling structure further comprises a refrigeration assembly;

The refrigerating assembly comprises a refrigerator 5 and a refrigerating connecting piece 6, the refrigerating connecting piece 6 comprises a refrigerating cavity 601, and the refrigerating cavity is communicated with a wind source and an air inlet channel 1011; the refrigerating part 501 of the refrigerator 5 acts on the refrigerating chamber to cool the gas flowing through the refrigerating chamber;

the refrigerator 5 is a semiconductor refrigerator 5;

the refrigerating assembly further comprises a first air conveying pipeline 3 and a second air conveying pipeline 7, the refrigerating cavity 601 is communicated with the air inlet channel 1011 through the first air conveying pipeline 3, the refrigerating cavity 601 is also communicated with the air source 8 through the second air conveying pipeline 7, the first air conveying pipeline 3 is positioned on one side of the refrigerating cavity 601, and the second air conveying pipeline 7 is positioned on the other side of the refrigerating cavity 601;

the first air delivery pipeline 3 comprises a split joint 302 and an air guide pipe 301;

the split joint 302 comprises a main pipe 3021 and branch pipes 3022 communicated with the main pipe 3021, the number of the branch pipes 3022 is the same as that of the air inlet channels 1011, and the branch pipes 3022 are communicated with the corresponding air inlet channels 1011;

the main pipe 3021 is communicated with the refrigerating cavity 601 through the air guide pipe 301;

the printhead 2 further comprises a first nozzle connection 202 and a first housing 201;

the nozzle 203, the first nozzle connector 202 and the shunt joint 302 are positioned in the first shell, and the nozzle 203 is connected with the first nozzle connector 202; the first nozzle link 202 protrudes from an upper portion of the first housing 201, and the nozzle 203 protrudes from a lower portion of the first housing 201;

The first nozzle passage 9 through which the nozzle 203 passes, the main passage 1012, the air intake passage 1011, and the air outlet passage 1013 are all provided around the first nozzle passage 9.

Wherein, also include the air-blowing channel 102, the air-blowing channel 102 includes the air outlet 1014, the air outlet 1014 faces the spray nozzle 203; the air inlet 1033 is disposed corresponding to the air outlet 1014 and is located at different sides of the nozzle 203;

wherein the air outlet 1014 is located within the negative pressure region of the air inlet 1033; the air outlet 1014 is opposite to the air inlet 1033, and the nozzle 203 is located between the air outlet 1014 and the air inlet 1033; the air inlet 1033 of the air blowing channel 102 is communicated with the air blowing end of the air source 12, and the air outlet of the air suction channel 103 is communicated with the air suction end of the air source 12;

the air inlet 1033 is the same height as the air outlet 1014.

The air blowing channel 102 includes a first air blowing section 1021 and a second air blowing section 1022 that is communicated with the first air blowing section 1021, the air suction channel 103 includes a first air suction section 1031 and a second air suction section 1032, and the second air blowing section 1022 and the second air suction section 1032 are inclined toward the direction approaching the printing head 2;

the cross section of the second air blowing section 1022 is gradually reduced along a first direction, which is a direction from one end of the second air blowing section 1022 communicating with the first air blowing section 1021 to one end far from the first air blowing section 1021;

The cross section of the second suction section 1032 gradually decreases along the second direction, which is the direction from the end of the second suction section 1032 communicating with the first suction section 1031 to the end far from the first suction section 1031;

the 3D printer further comprises an air suction connecting pipe 11 and an air blowing connecting pipe 10, wherein an air blowing end is communicated with the first air blowing section 1021 through the air blowing connecting pipe 10, and the air suction end is communicated with the first air suction section 1031 through the air suction connecting pipe 11.

Wherein the tuyere 1 comprises a tuyere housing comprising a second nozzle channel 13 to accommodate the nozzle 203;

the printhead 2 further comprises a second nozzle connection 205 and a second housing 204;

the nozzle 203 and the second nozzle connector 205 are positioned in the shell, and the nozzle 203 is connected with the second nozzle connector 205; a second nozzle link 205 protruding from an upper portion of the second housing 204, and a nozzle 203 protruding from a lower portion of the second housing 204;

the tuyere 1 is further provided with a second nozzle channel 13 for the nozzle 203 to pass through, the air suction channel 103 is positioned on one side of the second nozzle channel 13, and the air blowing channel 102 is positioned on the other side of the second nozzle channel 13.

In a second aspect, as shown in fig. 5 to 6 and fig. 8 to 13, an embodiment of the present utility model provides an enhanced cooling structure for a 3D printer, including a tuyere 1, where the tuyere 1 includes a blast channel 101, and the blast channel 101 includes at least two air outlets 1014 having different heights.

According to the enhanced cooling structure for the 3D printer provided by the embodiment of the utility model, the air supply channel 101 on the air nozzle 1 is provided with at least two air outlets 1014 with different heights, so that the quantity of the air outlets 1014 is increased, the air output is further improved, the heat dissipation effect is enhanced, the heights of the air outlets 1014 are different, the condition that the air output by the air outlets 1014 interfere with each other is avoided, the heat dissipation effect is better, the purpose of rapidly cooling a model is achieved, and the molding quality of the model is further improved.

It should be noted that, the heat dissipation mechanism in this embodiment may be the heat dissipation mechanism in the above embodiment, and the implementation and working principle of the specific heat dissipation mechanism may be referred to the corresponding content in the above embodiment, which is not described herein again.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The 3D printer comprises a frame, a printing platform and a moving mechanism, wherein the printing platform and the moving mechanism are arranged on the frame, and a printing head is connected to the moving mechanism; the printing head comprises a nozzle and a heating device, wherein the nozzle is used for extruding consumable materials to the printing platform for printing a three-dimensional model, and the printing head further comprises a model heat dissipation mechanism arranged on the frame or at the printing head, and the printing head is characterized in that the model heat dissipation mechanism comprises a wind source and a wind supply structure, the wind supply structure comprises an air outlet, so that wind is discharged under the action of the wind source, and the wind supply structure further comprises an enhanced cooling structure.

2. The 3D printer of claim 1, wherein the enhanced cooling structure comprises a tuyere comprising a blast channel comprising at least two of the air outlets of different heights.

3. The 3D printer of claim 1, wherein the enhanced cooling structure comprises a tuyere comprising a suction channel comprising an air inlet, a suction negative pressure region of the air inlet being located at the nozzle.

4. The 3D printer of claim 2, wherein: the air supply channel comprises a main channel arranged in the air nozzle and positioned at the upstream and an air outlet channel arranged in the air nozzle and positioned at the downstream, and the main channel is communicated with the air outlet channel; the air outlet channel corresponds to the air outlet;

The main channels are respectively communicated with air inlet ends of at least two air outlet channels, and the air outlets are arranged at air outlet ends of the corresponding air outlet channels;

the air supply channel further comprises an air inlet channel, and the air inlet channel is communicated with the air source and the main channel;

the number of the air inlet channels is greater than or equal to the number of the air outlet channels;

the air outlet direction of the air outlet channel faces the nozzle, and the cross section of the air outlet channel is reduced along the direction from the air inlet end to the air outlet end;

the tuyere comprises a tuyere housing comprising a first nozzle channel to accommodate the nozzle; the main channel is a single annular main channel, and the single annular main channel is communicated with the air inlet channel and the air outlet channel; the single annular main channel surrounds the first nozzle channel.

5. The 3D printer of claim 2, wherein the height is a height at which an air outlet direction of the air outlet intersects a target area;

the at least two air outlets with different heights comprise air outlets with opposite positions or air outlets with arrayed positions;

the height difference of the air outlets with different heights is between 0.5 and 1.5 mm;

Wherein the target area is a central axis of the nozzle.

6. The 3D printer of claim 4, wherein the enhanced cooling structure further comprises a refrigeration assembly;

the refrigerating assembly comprises a refrigerator and a refrigerating connecting piece, the refrigerating connecting piece comprises a refrigerating cavity, and the refrigerating cavity is communicated with the air source and the air inlet channel; a refrigeration component of the refrigerator acts on the refrigeration cavity to cool the gas flowing through the refrigeration cavity;

the refrigerator is a semiconductor refrigerator;

the refrigerating assembly further comprises a first air conveying pipeline and a second air conveying pipeline, the refrigerating cavity is communicated with the air inlet channel through the first air conveying pipeline, the refrigerating cavity is also communicated with the air source through the second air conveying pipeline, the first air conveying pipeline is positioned on one side of the refrigerating cavity, and the second air conveying pipeline is positioned on the other side of the refrigerating cavity;

the first air conveying pipeline comprises a split joint and an air guide pipe;

the branch connectors comprise a main pipe and branch pipes communicated with the main pipe, the number of the branch pipes is the same as that of the air inlet channels, and the branch pipes are communicated with the corresponding air inlet channels;

The main pipe is communicated with the refrigerating cavity through the air guide pipe;

the printhead further includes a first nozzle link and a first housing;

the nozzle, the first nozzle connecting piece and the shunt joint are positioned in the first shell, and the nozzle is connected with the first nozzle connecting piece; the first nozzle connection member protrudes from an upper portion of the first housing, and the nozzle protrudes from a lower portion of the first housing;

the first nozzle channel through which the nozzle passes, the main channel, the air inlet channel and the air outlet channel are all arranged around the first nozzle channel.

7. The 3D printer of claim 3, further comprising a blower channel including the air outlet, the air outlet being directed toward the nozzle; the air inlet and the air outlet are correspondingly arranged and are positioned on different sides of the nozzle;

wherein the air outlet is positioned in the negative pressure area of the air inlet; the air outlet is opposite to the air inlet, and the nozzle is positioned between the air outlet and the air inlet; an air inlet of the air blowing channel is communicated with an air blowing end of the air source, and an air outlet of the air suction channel is communicated with an air suction end of the air source;

The heights of the air inlet and the air outlet are the same.

8. The 3D printer of claim 7, wherein the air-blowing channel comprises a first air-blowing section and a second air-blowing section in communication with the first air-blowing section, the air-blowing channel comprises a first air-blowing section and a second air-blowing section, the second air-blowing section and the second air-blowing section being inclined in a direction approaching the print head;

the cross section of the second air blowing section gradually decreases along a first direction, and the first direction is the direction from one end of the second air blowing section communicated with the first air blowing section to one end far away from the first air blowing section;

the cross section of the second air suction section gradually decreases along a second direction, and the second direction is the direction from one end of the second air suction section, which is communicated with the first air suction section, to one end of the second air suction section, which is far away from the first air suction section;

the 3D printer further comprises an air suction connecting pipe and an air blowing connecting pipe, wherein the air blowing end is communicated with the first air blowing section through the air blowing connecting pipe, and the air suction end is communicated with the first air suction section through the air suction connecting pipe.

9. The 3D printer of claim 8, wherein the tuyere comprises a tuyere housing comprising a second nozzle channel to house the nozzle;

The printhead further includes a second nozzle link and a second housing;

the nozzle and the second nozzle connecting piece are positioned in the shell, and the nozzle is connected with the second nozzle connecting piece; the second nozzle connecting piece extends from the upper part of the second shell, and the nozzle extends from the lower part of the second shell;

the air nozzle is characterized in that a second nozzle channel for the nozzle to pass through is further arranged on the air nozzle, the air suction channel is positioned on one side of the second nozzle channel, and the air blowing channel is positioned on the other side of the second nozzle channel.

10. The enhanced cooling structure for a 3D printer, applied to the 3D printer according to claim 1, comprising a tuyere, wherein the tuyere comprises an air supply channel, and the air supply channel comprises at least two air outlets with different heights.