CN220499963U

CN220499963U - Printing head and 3D printer

Info

Publication number: CN220499963U
Application number: CN202321495351.5U
Authority: CN
Inventors: 周承立; 杨锦锋
Original assignee: Shenzhen Anycubic Technology Co Ltd
Current assignee: Shenzhen Anycubic Technology Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2024-02-20
Anticipated expiration: 2033-06-12

Abstract

The application provides a print head and 3D printer belongs to 3D and prints technical field, wherein print head includes the nozzle, heating element, radiator unit and choke, specifically, heating element is used for carrying out heating and melting to the consumptive material in the choke, radiator unit is used for dispelling the heat to the choke, ensure that the consumptive material of choke transmission can stabilize the output, and be the trend that increases from the fin length at bottom to top, and then increase the radiating area at radiating block top, reduce the radiating area at radiating block bottom, make the radiating block both ends form different radiating effect, the radiating effect that is close the radiating block top more is better, this also can carry out preheating and melting when making the consumptive material in the choke arrive the radiating block bottom, ensure the melting rate of consumptive material under high-speed condition, ensure the ageing and the stability of consumptive material output, in order to realize the high-speed printing of print head.

Description

Printing head and 3D printer

Technical Field

The application belongs to the technical field of 3D printing, and particularly relates to a printing head and a 3D printer.

Background

With the continuous development of 3D printers, the printing speed requirements for various 3D printers are also higher and higher. At present, 3D printer printing speed based on fused deposition modeling technology carries out 3D and prints is generally slower, and the main reason is at the printing in-process, and the print head heating efficiency of 3D printer is low for consumable in the print head comes not as fast as melting and extrusion, and then influences printing efficiency, can't realize high-speed printing.

The utility model provides a 3D printer print head with big temperature variation scope in the patent of application number 202221488244.5, be provided with radiator unit on the print head, radiator unit includes the radiating fin of a plurality of installation on annular heat-conducting plate, the size of each radiating fin is the same for the same radiating effect has on each position of radiator unit, and the heat radiation of radiator unit internal heat convection and radiator unit self is more, and the consumable is carried and is difficult to preheat to radiator unit bottom, can't guarantee the melting rate of consumable under high-speed condition, is difficult to realize high-speed printing.

Disclosure of Invention

The main aim of the application is to provide a print head and 3D printer, solved among the prior art consumptive material be difficult to preheat in the radiating component bottom, unable assurance consumptive material melt rate under the high-speed condition is difficult to realize high-speed printed technical problem.

In order to achieve the above object, in one aspect, the present application provides a printhead including a nozzle, a heating assembly, a heat dissipating assembly, and a throat; the heat dissipation assembly, the throat pipe, the heating assembly and the nozzle are sequentially connected and arranged along a first direction; the heat dissipation assembly comprises a heat dissipation block, wherein the heat dissipation block comprises a plurality of heat dissipation fins, at least a plurality of the heat dissipation fins are arranged along the first direction, and each heat dissipation fin extends along the second direction; the dimension of the radiating fin close to the heating component in the second direction is smaller than or equal to the dimension of the radiating fin far away from the heating component in the second direction, and the dimension of the radiating fin at least partially close to the heating component in the second direction is smaller than the dimension of the radiating fin far away from the heating component in the second direction.

Optionally, in a direction from the heat dissipating component to the heating component, a plurality of the heat dissipating fins gradually decrease in size in the second direction.

Optionally, the nozzle is detachably connected to an end of the heating component away from the heat dissipation component; the throat pipe penetrates through the heat dissipation assembly along the first direction and then stretches into the heating assembly, and the throat pipe is communicated with the nozzle in the heating assembly; the radiating block further comprises a connecting piece, wherein the connecting piece comprises a first connecting section and a second connecting section which are connected; the first connecting section is arranged on one side, far away from the heating assembly, of the radiating block and is attached to the radiating fin, and a mounting hole is formed in the side face of the first connecting section; the second connecting sections are arranged along the first direction and are respectively connected with each radiating fin (201); the first through hole is formed in the axis of the connecting piece along the first direction, the first through hole sequentially penetrates through the first connecting section and the second connecting section along the axis, and the throat penetrates through the heat dissipation assembly through the first through hole.

Optionally, a first temperature measuring hole is formed on the heat dissipating block, the first temperature measuring hole is connected with a first temperature sensor in a matching way, and the first temperature sensor is used for detecting the temperature of the heat dissipating block so as to generate a temperature signal; the printing head further comprises a fan, the radiating block is provided with a connecting hole, the fan is connected with the radiating block through the connecting hole, the air outlet direction of the fan corresponds to the radiating block, and the fan is used for controlling the air outlet according to a control signal generated by the temperature signal.

Optionally, a heat insulation board is arranged between the heating component and the heat dissipation component, and the heat insulation board is attached to a heat dissipation fin on one side of the heat dissipation block, which is close to the heating component; the center of the heat insulating plate is provided with a second through hole, and the throat pipe passes through the heat insulating plate through the second through hole.

Optionally, the heating component comprises a heating block, a ceramic heating plate and a clamping seat; the heating block is arranged in a manner of being attached to the ceramic heating plate, and the clamping seat is sleeved outside the ceramic heating plate and the heating block and used for clamping the ceramic heating plate and the heating block.

Optionally, an installation groove is formed in the outer wall of the heating block, the ceramic heating sheet is arranged in the installation groove, and heat conduction silicone grease is smeared on one side, which is attached to the heating block, of the ceramic heating sheet; the heating block (301) is a nickel-plated copper block; the heating block is provided with a third through hole along a first direction, and the throat pipe extends into the heating assembly through the third through hole; a second temperature measuring hole is formed in the side face of the heating block, a second temperature sensor is connected in the second temperature measuring hole, and the second temperature sensor is used for detecting the temperature of the heating block; the heating block is far away from the threaded hole is formed in one end of the heat radiating component, the heating block is in threaded connection with the nozzle through the threaded hole, and the third through hole is communicated with the nozzle.

Optionally, the locating hole has been seted up to the side of heating block, be provided with the locating part on the inner wall of cassette, the locating hole with the locating part cooperation is connected, so that the cassette chucking is in on the outer wall of heating block.

Optionally, the heating assembly further comprises a thermal insulation sleeve; the heat preservation sleeve is sleeved on the outer wall of the clamping seat and is used for preserving heat of the heating block and the ceramic heating piece; the nozzle is a hardened steel nozzle or a titanium alloy nozzle, and the throat is a titanium alloy throat.

In another aspect of the present application, a 3D printer is provided, including any of the printheads described above.

Advantageous effects

According to the printing head and the 3D printer provided by the embodiment of the utility model, the heating component is arranged on the printing head and used for heating and melting consumable materials in the throat, the heat dissipation component is used for dissipating heat of the throat, the consumable materials transferred by the throat can be stably output, the lengths of the plurality of heat dissipation fins in the heat dissipation block extending along the second direction are changed along the first direction far away from the heating component, so that the heat dissipation areas formed by the heat dissipation fins at the two ends of the heat dissipation block are different, the heat dissipation area of the heat dissipation block far away from the top of the heating component is increased, the heat dissipation area of the heat dissipation block close to the bottom of the heating component is reduced, the heat dissipation effect of the heat dissipation block close to the top of the heat dissipation block is better, the consumable materials in the throat can be preheated and melted when reaching the bottom of the heat dissipation block, the melting rate of the consumable materials under the high-speed condition is ensured, and the timeliness and stability of the consumable materials output are ensured, so that the high-speed printing of the printing head is realized.

Drawings

FIG. 1 is a schematic perspective view of a printhead according to an embodiment of the present application;

FIG. 2 is a schematic exploded view of a printhead according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a printhead according to an embodiment of the present application;

FIG. 4 is a side view of a printhead of an embodiment of the present application;

fig. 5 is a schematic structural diagram of a middle heat dissipating component of a printhead according to an embodiment of the present application.

The reference numerals are expressed as:

1. a nozzle;

2. a heat dissipation assembly; 201. a heat sink; 202. a connecting piece; 2021. a mounting hole; 2022. a first temperature measuring hole; 2023. a first through hole; 204. a fan; 205. a first temperature sensor;

3. a heating assembly; 301. a heating block; 3011. a third through hole; 3012. a second temperature measuring hole; 302. a ceramic heating sheet; 303. a clamping seat; 304. a second temperature sensor; 305. a thermal insulation sleeve;

4. a throat;

5. and the heat insulation plate.

Detailed Description

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

In one aspect of the present application, there is provided a printhead, as shown in fig. 1 to 4, comprising a nozzle 1, a heating assembly 3, a heat dissipating assembly 2 and a throat 4; the heat radiation component 2, the throat pipe 4, the heating component 3 and the nozzle 1 are sequentially connected and arranged along a first direction; the heat dissipation assembly 2 includes a heat dissipation block including a plurality of heat dissipation fins 201, at least the plurality of heat dissipation fins 201 being arranged along the first direction, each heat dissipation fin 201 extending along the second direction; the dimension of the heat sink 201 near the heating element 3 in the second direction is smaller than or equal to the dimension of the heat sink 201 far from the heating element 3 in the second direction, and at least part of the dimension of the heat sink 201 near the heating element 3 in the second direction is smaller than the dimension of the heat sink 201 far from the heating element in the second direction.

In this application, the heat dissipation assembly 2, the throat 4, the heating assembly 3 and the nozzle 1 are sequentially connected and are arranged along the first direction, and the centers of the heat dissipation assembly 2, the throat 4, the heating assembly 3 and the nozzle 1 can be on the same straight line, but the heat dissipation assembly 2, the throat 4, the heating assembly 3 and the nozzle 1 are not limited to be on the same straight line.

According to the printing head provided by the embodiment of the application, the heating component 3 is used for heating and melting consumable materials entering the heating component 3, the throat 4 is used for limiting the advancing direction of the consumable materials and preheating the consumable materials entering the throat 4, the heat radiating component 2 is used for radiating the throat 4, consumable materials in the throat are at least partially in a solid state, stable output of consumable materials transmitted by the throat 4 is ensured, a plurality of radiating fins 201 in the radiating block extend along the second direction, the lengths continuously change along the first direction far away from the heating component 3, the radiating areas formed by the radiating fins 201 at two ends of the radiating block are different, the radiating area of the top of the radiating block far away from the heating component 3 is increased, the radiating area of the bottom of the radiating block near the heating component 3 is reduced, different radiating effects are achieved at two ends of the radiating block, the more good radiating effect near the top of the radiating block is achieved, the consumable materials in the throat 4 near the one end of the heating component 3 are enabled to have enough required temperature, the consumable materials in the throat 4 can be stably output under the condition that the consumable materials are preheated near the one end of the heating component 3, the high-speed consumable materials can be ensured, and the printing stability is ensured, and the printing quality is ensured.

Wherein, the number of the plurality of cooling fins 201 in the cooling block is at least two, at least two cooling fins 201 can form a cooling area with a certain area, when the number of the cooling fins 201 is larger, the formed cooling area is larger, and the lengths of the cooling fins 201 extending in the second direction are different, so that the difference of the cooling areas formed at the two ends of the cooling block is larger, and the difference of the cooling effects is also larger; meanwhile, the first direction is vertical to the second direction, namely, the vertical direction perpendicular to the plane where the printing platform is located, namely, the axial direction of the throat 4, while the second direction is parallel to the plane where the printing platform is located, and the extension length of the cooling fin 201 in the second direction is the length of the cooling fin 201.

Specifically, in the above-described embodiment, in the direction of the heat radiation member 2 toward the heating member 3, the plurality of fins 201 gradually decrease in size in the second direction.

In this embodiment, the lengths of the heat dissipation fins 201 extending in the second direction continuously decrease from the heat dissipation component 2 to the heating component 3, and the difference between the lengths of the two adjacent heat dissipation fins 201 extending in the second direction is equal, so that the heat dissipation block is integrally formed into a trapezoid structure, that is, one side of the heat dissipation block away from the heating component 3 is a long bottom edge of the trapezoid structure, and one side of the heat dissipation block close to the heating component 3 is a short bottom edge of the trapezoid structure, the difference of heat dissipation effects generated by different heat dissipation areas on two sides of the heat dissipation block is more obvious due to the trapezoid structure, and the heat dissipation effect of the heat dissipation block is also more uniform along the first direction.

Specifically, in the above-described embodiment, as shown in fig. 2 and 5, the nozzle 1 is detachably attached to the end of the heating member 3 remote from the heat radiation member 2; the throat pipe 4 penetrates through the heat dissipation assembly 2 along the first direction and then stretches into the heating assembly 3, and the throat pipe 4 is communicated with the nozzle 1 in the heating assembly 3; the heat dissipation block further comprises a connecting piece 202, the connecting piece 202 comprises a first connecting section and a second connecting section which are connected, wherein the first connecting section is arranged on one side of the heat dissipation block far away from the heating component 3 and is attached to the heat dissipation fins 201, the side face of the first connecting section is provided with a mounting hole 2021, the second connecting section is arranged along the first direction, and the second connecting section is respectively connected with each heat dissipation fin 201; a first through hole 2023 is formed along the axis of the first direction connecting member 202, the first through hole 2023 sequentially passes through the first connecting section and the second connecting section along the axis, and the throat 4 passes through the heat dissipating assembly 2 through the first through hole 2023.

In the embodiment, the consumable enters from the opening of the throat pipe 4, passes through the heat dissipation component 2 in the throat pipe 4 along the first direction and then stretches into the heating component 3, the nozzle 1 is communicated with the heating component 3, and the nozzle 1 extrudes the consumable to print; the heat dissipation block is connected with each heat dissipation plate 201 specifically through the connecting piece 202, the connecting piece 202 can be divided into a first connecting section and a second connecting section specifically along the first direction, wherein the first connecting section is positioned at the top of the heat dissipation block, the side surface of the first connecting section is provided with a mounting hole 2021, and a screw penetrates through the mounting hole 2021 to integrally fix the printing head on a copper nut of an injection molding front cover of the extruder, so that the printing head can be quickly assembled and disassembled; and the second connecting section is disposed along the first direction, and the second connecting section is sequentially connected and fixed with all the heat dissipation fins 201, so that all the heat dissipation fins 201 are kept parallel and the distances between two adjacent heat dissipation fins 201 are equal. Meanwhile, a first through hole 2023 is formed along the axes of the first connection section and the second connection section in the first direction, so that the throat 4 passes through the heat dissipation component 2 along the first through hole 2023 and then extends into the heating component 3.

Specifically, in the above embodiment, as shown in fig. 2 to 4, the heat dissipating block is provided with a first temperature measuring hole 2022, the first temperature measuring hole 2022 is cooperatively connected with a first temperature sensor 205, and the first temperature sensor 205 is used for detecting the temperature of the heat dissipating block to generate a temperature signal; the printing head further comprises a fan 204, the heat dissipation block is provided with a connecting hole, the fan 204 is connected with the heat dissipation block through the connecting hole, the air outlet direction of the fan 204 corresponds to the heat dissipation block, and the fan 204 is used for controlling the air outlet according to a control signal generated by a temperature signal.

In this embodiment, a first temperature measuring hole 2022 is formed in a side surface of the heat dissipating block, a first temperature sensor 205 extends into the first temperature measuring hole 2022 to detect the temperature of the heat dissipating block and generate a temperature signal based on the temperature of the heat dissipating block, a fan 204 is further disposed on the print head, the fan 204 is used as an air-cooled heat dissipating source, the heat dissipating block is disposed opposite to the heat dissipating block, specifically, a connecting hole is additionally formed in one surface of the heat dissipating block to connect the fan 204 to the heat dissipating block, at this time, the fan 204 is perpendicular to each heat dissipating fin 201 in the heat dissipating block, and the fan 204 completely covers the whole heat dissipating block, so that the fan 204 can perform air-cooled heat dissipation on all the heat dissipating fins 201 in the heat dissipating block, and the heat dissipating rate of the heat dissipating block is accelerated. Wherein, first temperature sensor 205 is preferably NTC thermistor, when needs carry out high-speed printing according to the print demand of 3D printer, utilize NTC thermistor to detect the inside temperature variation of radiator unit 2, and with the mainboard of temperature signal feedback to 3D printer, and the mainboard control fan 204 of 3D printer reduces the air output, and then reduce the heat dissipation rate of radiator block and ensure the melting rate of consumptive material in heating element 3, guarantee the timeliness and the stability of consumptive material output, in order to satisfy the demand of high-speed printing, fan 204 and first temperature sensor 205 cooperation use can be based on the radiating effect of printing the effective adjustment radiator block of demand.

Specifically, in the above embodiment, the heat insulation board 5 is disposed between the heating component 3 and the heat dissipation component 2, and the heat insulation board 5 is attached to the heat dissipation fin 201 on the heat dissipation block near to the side of the heating component 3, and the center of the heat insulation board 5 is provided with the second through hole, through which the throat 4 passes through the heat insulation board 5.

In this embodiment, be provided with heat insulating board 5 in the bottom of radiating block promptly at the one end that the radiating block is close to heating element 3, heat insulating board 5 laminating sets up the fin 201 bottom that is closest to heating element 3 in the radiating block, the heat insulating sheet sets up between heating element 3 and cooling element 2, fully keep apart the heat dissipation space and the heating space in the print head, can prevent effectively that the heat that heating element 3 produced from constantly radiating to cooling element 2, and then influence the radiating effect of cooling element 2, reduce the possibility of consumable card material in choke 4. The throat 4 passes through the heat dissipation assembly 2 along the vertical direction and then extends into the heating assembly 3 through the heat insulation plate 5, so that a second through hole is formed in the center of the heat insulation plate 5, and the diameter of the second through hole is equal to that of the first through hole 2023, so that the throat 4 can be smoothly inserted.

Specifically, in the above embodiment, as shown in fig. 2 and 3, the heating assembly 3 includes a heating block 301, a ceramic heating plate 302, and a clamping seat 303, where the heating block 301 is attached to the ceramic heating plate 302, and the clamping seat 303 is sleeved outside the ceramic heating plate 302 and the heating block 301, so as to clamp the ceramic heating plate 302 and the heating block 301.

In this embodiment, the throat pipe 4 specifically extends into the heating block 301 and is conducted with the nozzle 1 in the heating block 301, the ceramic heating sheet 302 is attached to the heating block 301, the ceramic heating sheet 302 heats the heating block 301 to heat the throat pipe 4 in the heating block 301 and the connecting channel between the throat pipe 4 and the nozzle 1, so as to achieve the effect of heating the consumable in the throat pipe 4, and the clamping seat 303 is arranged outside the ceramic heating sheet 302 and the heating block 301 to clamp the ceramic heating sheet 302 and the heating block 301, so that the heating effect of the ceramic heating sheet 302 on the heating block 301 is ensured; specifically, the clamping seat 303 is a spring clamping seat, and can elastically clamp the ceramic heating sheet 302 and the heating block 301, and simultaneously, the clamping degree is convenient to adjust.

Further, an installation groove is formed in the outer wall of the heating block 301, a ceramic heating plate 302 is arranged in the installation groove, and heat conduction silicone grease is smeared on one side, which is attached to the heating block 301, of the ceramic heating plate 302; the heating block 301 is a nickel-plated copper block; the third through hole 3011 has been seted up along the first direction to the heating block 301, and choke 4 stretches into heating element 3 through third through hole 3011, and second temperature measurement hole 3012 has been seted up to the side of heating block 301, is connected with second temperature sensor 304 in the second temperature measurement hole 3012, and second temperature sensor 304 is used for detecting the temperature of heating block 301, has seted up the screw hole on the one end that heating block 301 kept away from radiator unit 2, and heating block 301 passes through screw hole and nozzle 1 threaded connection, and third through hole 3011 switches on with nozzle 1.

In this embodiment, the heating block 301 is specifically a copper block, and the surface of the heating block 301 is treated by adopting a copper nickel plating process, that is, a layer of nickel is plated on the heating block 301 made of copper by an electrolysis or chemical method, the heating block 301 adopts the copper nickel plating heating block 301, which has a higher heat conduction coefficient of about 401W/m.k, and the nickel plating on the surface of the heating block 301 can not only effectively prevent the dissipation of heat radiation, but also prevent the abrasion of threaded holes or through holes on the heating block 301, improve the surface finish of the inside of the heating block 301, and reduce the resistance of consumable extrusion. Meanwhile, an installation groove is formed in the side face of the heating block 301, heat-conducting silicone grease is smeared on one face of the ceramic heating sheet 302, the ceramic heating sheet 302 is arranged in the installation groove, the ceramic heating sheet 302 coated with the heat-conducting silicone grease is attached to the heating block 301, the clamping seat 303 further fixes the ceramic heating sheet 302 and the heating block 301, the ceramic heating sheet 302 serves as a heat source of the heating assembly 3, the heating block 301 is continuously heated, and consumable materials in the throat 4 in the heating block 301 are heated and melted, so that the heating effect is stable. A second temperature measuring hole 3012 is formed in the side face of the heating block 301, and a second temperature sensor 304 extends into the second temperature measuring hole 3012 to measure the temperature of the heating block 301, so that the heating temperature of the heating assembly 3 can be known in time. Specifically, the second temperature sensor 304 is a K-type thermocouple, which has a simple structure and low cost, can accurately obtain the temperature of the heating block 301, and can display the temperature of the heating block 301 through an instrument and feed the temperature back to the 3D printer in a signal form, so that the heating rate of the heating assembly 3 can be adjusted in time. And a threaded hole is formed in the center of the bottom end of the heating block 301 for connecting the nozzle 1, meanwhile, a third through hole 3011 is formed in the axis of the heating block 301, the third through hole 3011 is specifically divided into two parts, the diameter of the third through hole 3011, which is positioned at the top of the heating block 301 and is close to one end of the heat dissipation component 2, is larger than that of the throat 4, so that the throat 4 can conveniently extend into the heating block 301, the diameter of the third through hole 3011 of the other parts is equal to the inner diameter of the nozzle 1, and is further communicated with the nozzle 1, and compared with the throat 4, the diameter of the throat 4 is small, consumable materials flow into the third through hole 3011 of the heating block 301 through the throat 4 and then flow into the nozzle 1, and are used for the subsequent output printing process.

Further, a positioning hole is formed in the side face of the heating block 301, a limiting piece is arranged on the inner wall of the clamping seat 303, and the positioning hole is connected with the limiting piece in a matched mode, so that the clamping seat 303 is clamped on the outer wall of the heating block 301.

In the present embodiment, the ceramic heat generating sheet 302 is used as a heat source of the heating unit 3, and the ceramic heat generating sheet 302 is clamped and bonded to the heating block 301 by the clamping base 303, so that the ceramic heat generating sheet 302 can continuously heat the heating block 301. In order to ensure that the clamping seat 303 can stably play a clamping role, a limiting piece is arranged in the inner wall of the clamping seat 303, the limiting piece is specifically in a convex structure, a positioning hole is formed in the outer wall of one surface of the heating block 301, the positioning hole is in a concave structure, and the limiting piece and the positioning hole are oppositely arranged and are matched and connected, so that the clamping seat 303 can be stably fixed on the outer wall of the heating block 301, and the ceramic heating plate 302 and the heating block 301 are clamped. By means of the positioning mode of the concave-convex structure, the structure is simple, the clamping seat 303 can be firmly clamped on the heating block 301, and the ceramic heating plate 302 can stably provide a heat source.

Further, the heating assembly 3 further comprises a heat insulation sleeve 305, wherein the heat insulation sleeve 305 is sleeved on the outer wall of the clamping seat 303 and is used for insulating the heating block 301 and the ceramic heating plate 302; the nozzle 1 is a hardened steel nozzle or a titanium alloy nozzle, and the throat 4 is a titanium alloy throat.

In this embodiment, the heating block 301 and the ceramic heating sheet 302 in the heating assembly 3 are clamped by the clamping seat 303 to form an integral structure, so as to ensure the heating effect of the heating assembly 3, the outer wall of the clamping seat 303 is sleeved with the insulation sleeve 305, the insulation sleeve 305 integrally wraps the heating block 301, the ceramic heating sheet 302 and the clamping seat 303 to perform insulation, heat radiation and heat convection heat dissipation in the heating block 301 are effectively reduced, the heating assembly 3 is always kept in a high-temperature state, and smoothness and stability of material consumption output in the throat 4 are ensured. Meanwhile, the print head is one of the most important factors affecting the quality of the 3D printer printing model, wherein the nozzle 1 and the throat 4 are the most important parts in the print head. The heating component 3 in the printing head melts liquid resin and other consumable materials in the throat 4 into colloid, the consumable materials continuously extruded in the throat 4 continuously apply pressure, the melted colloid liquid resin and other consumable materials are extruded through the nozzle 1, and the throat 4 is communicated with the nozzle 1 to serve as a channel for conveying the consumable materials. Based on the service environment of the throat pipe 4, the material of the throat pipe 4 is selected, so that the throat pipe 4 is firstly ensured to have the characteristic of high temperature resistance, softening does not occur in the heating process of the heating component 3, the printing quality is affected, meanwhile, certain strength is required, and the fluency of consumable output is ensured, so that the throat pipe 4 is selected from a titanium alloy throat pipe, can work in the environment of 450-500 ℃, has very strong heat resistance, has very high strength, and meanwhile, the titanium alloy material has very strong corrosion resistance, so that the throat pipe 4 can work under severe working conditions for a long time. Similarly, the nozzle 1 can be a titanium alloy nozzle made of the same material as the throat 4, and can also be a hardened steel nozzle, and the hardened steel is used as an iron-carbon alloy, so that the nozzle has high strength and high formability, and can be suitable for the working environment of the nozzle 1.

In another embodiment of the printheads provided herein: the printing head comprises a nozzle 1, a heating component 3, a heat dissipation component 2 and a throat 4, wherein the nozzle 1, the heating component 3, the heat dissipation component 2 and the throat 4 are sequentially connected and are arranged along a first direction. The heat dissipation assembly 2 comprises a heat dissipation block, the heat dissipation block comprises a plurality of heat dissipation fins 201, at least the plurality of heat dissipation fins 201 are arranged along a first direction, each heat dissipation fin extends along a second direction, the dimension of the heat dissipation fin 201 close to the heating assembly 3 in the second direction is smaller than or equal to the dimension of the heat dissipation fin 201 far away from the heating assembly 3 in the second direction, and the dimension of at least part of the heat dissipation fin close to the heating assembly 3 in the second direction is smaller than the dimension of the heat dissipation fin far away from the heating assembly 3 in the second direction, specifically, in the direction of the heat dissipation assembly 2 towards the heating assembly 3, the dimension of the plurality of heat dissipation fins 201 in the second direction is gradually decreased, so that the heat dissipation area of the top of the heat dissipation block is larger, the heat dissipation effect is better, consumable materials at the bottom of the heat dissipation block can be preheated and melted, the melting rate of consumable materials under high-speed conditions can be ensured, and the timeliness and stability of consumable material output are ensured; the heat dissipation block specifically still includes connecting piece 202, connecting piece 202 is connected with every fin 201, the first linkage segment in the connecting piece 202 is located the top of heat dissipation block, set up the mounting hole 2021 of being convenient for install and dismantlement, and the second linkage segment side is provided with first temperature measurement hole 2022, stretch into first temperature measurement hole 2022 with first temperature sensor 205 and can accurately detect the temperature of heat dissipation block and produce temperature signal, be convenient for follow-up regulation radiator unit 2 and the accuse temperature tactics of heating unit 3, simultaneously, the side of heat dissipation block still threaded connection has fan 204, fan 204 is just to all fins 201, the air output of fan 204 is used for dispelling the heat to fin 201 based on temperature signal control, the control heat dissipation rate. A heat insulation plate 5 is arranged between the heat radiation component 2 and the heating component 3, so that the heat radiation area is isolated from the heating area, and the heat of the heating area is transferred to the heat radiation area, thereby influencing the heat radiation effect. And heating element 3 specifically includes ceramic heating plate 302 and heating block 301 that the laminating set up, and ceramic heating plate 302 is paintd and is had heat conduction silicone grease, can be as the heat source to heat heating block 301, and then carries out heating melting to the consumptive material in the heating block 301, cassette 303 passes through concave-convex structure cooperation with heating block 301, realizes the fixed of ceramic heating plate 302 and heating block 301 to be equipped with heat preservation cover 305 at cassette 303 outer wall cover for keep warm heating element 3 wholly, avoid the heat to run off, and nozzle 1 and heating block 301 bottom threaded connection, specifically optional hardening steel or titanium alloy material preparation. And, first through hole 2023, second through hole and third through hole 3011 have been seted up in proper order along the axis of radiating block, heat insulating board 5 and heating block 301, and choke 4 passes three through holes in proper order and stretches into in the heating block 301, realizes switching on with nozzle 1 through third through hole 3011 finally, and choke 4's material selects the titanium alloy material.

In another aspect of the present application, a 3D printer is provided, including the printhead described above.

The application provides a 3D printer, the radiating area at the radiating block both ends in the print head wherein is different for the consumable can carry out the preheating melting in the bottom of radiating block, can ensure the melting rate of consumable under high-speed condition, ensures the timeliness and the stability of consumable output, and then ensures that 3D printer can stably carry out high-speed printing.

A first aspect of the present application provides a printhead comprising a nozzle 1, a heating assembly 3, a heat dissipating assembly 2 and a throat 4;

the heat radiation component 2, the throat pipe 4, the heating component 3 and the nozzle 1 are sequentially connected and arranged along a first direction;

the heat dissipation assembly 2 includes a heat dissipation block including a plurality of heat dissipation fins 201, at least the plurality of heat dissipation fins 201 being arranged along a first direction, each heat dissipation fin extending along a second direction; the dimension of the heat sink adjacent to the heating element 3 in the second direction is less than or equal to the dimension of the heat sink remote from the heating element 3 in the second direction, and at least a portion of the dimension of the heat sink adjacent to the heating element 3 in the second direction is less than the dimension of the heat sink remote from the heating element 3 in the second direction.

Wherein, in the direction of the heat dissipation assembly 2 to the heating assembly 3, the plurality of heat dissipation fins 201 gradually decrease in size in the second direction.

Wherein the nozzle 1 is detachably connected to one end of the heating component 3 away from the heat dissipation component 2;

the throat pipe 4 penetrates through the heat dissipation assembly 2 along the first direction and then stretches into the heating assembly 3, and the throat pipe 4 is communicated with the nozzle 1 in the heating assembly 3; the heat dissipation block further comprises a connecting piece 202, wherein the connecting piece 202 comprises a first connecting section and a second connecting section which are connected;

the first connecting section is arranged on one side of the radiating block away from the heating component 3 and is attached to the radiating fin 201, and the side surface of the first connecting section is provided with a mounting hole 2021;

the second connection sections are arranged along the first direction and are respectively connected with each radiating fin 201;

a first through hole 2023 is formed along the axis of the first direction connecting member 202, the first through hole 2023 sequentially passes through the first connecting section and the second connecting section along the axis, and the throat 4 passes through the heat dissipating assembly 2 through the first through hole 2023.

The heat dissipation block is provided with a first temperature measuring hole 2022, the first temperature measuring hole 2022 is connected with a first temperature sensor 205 in a matching way, and the first temperature sensor 205 is used for detecting the temperature of the heat dissipation block so as to generate a temperature signal;

the printing head further comprises a fan 204, the heat dissipation block is provided with a connecting hole, the fan 204 is connected with the heat dissipation block through the connecting hole, the air outlet direction of the fan 204 corresponds to the heat dissipation block, and the fan 204 is used for controlling the air outlet according to a control signal generated by a temperature signal.

Wherein, a heat insulation board 5 is arranged between the heating component 3 and the heat radiation component 2, and the heat insulation board 5 is attached to a heat radiation fin 201 on one side of the heat radiation block, which is close to the heating component 3;

the center of the heat insulating plate 5 is provided with a second through hole, and the throat 4 passes through the heat insulating plate 5 through the second through hole.

Wherein, the heating component 3 comprises a heating block 301, a ceramic heating plate 302 and a clamping seat 303;

the heating block 301 is attached to the ceramic heating plate 302, and the clamping seat 303 is sleeved outside the ceramic heating plate 302 and the heating block 301 and used for clamping the ceramic heating plate 302 and the heating block 301.

Wherein, the heating block 301 is provided with an installation groove, the ceramic heating sheet 302 is arranged in the installation groove, and the heat conduction silicone grease is smeared on one side of the ceramic heating sheet 302, which is attached to the heating block 301;

the heating block 301 is made of nickel-plated copper block;

the heating block 301 is provided with a third through hole 3011 along the first direction, and the throat 4 extends into the heating component 3 through the third through hole 3011;

a second temperature measuring hole 3012 is formed in the side surface of the heating block 301, a second temperature sensor 304 is connected in the second temperature measuring hole 3012, and the second temperature sensor 304 is used for detecting the temperature of the heating block 301;

a threaded hole is formed in one end, far away from the heat radiating component 2, of the heating block 301, the heating block 301 is in threaded connection with the nozzle 1 through the threaded hole, and the third through hole 3011 is communicated with the nozzle 1;

wherein, the side of the heating block 301 is provided with a positioning hole, the inner wall of the clamping seat 303 is provided with a limiting piece, and the positioning hole is connected with the limiting piece in a matching way, so that the clamping seat 303 is clamped on the outer wall of the heating block 301.

Wherein the heating assembly 3 further comprises a thermal sleeve 305;

the heat preservation sleeve 305 is sleeved on the outer wall of the clamping seat 303 and is used for preserving heat of the heating block 301 and the ceramic heating plate 302;

the nozzle 1 is a hardened steel nozzle or a titanium alloy nozzle, and the throat 4 is a titanium alloy throat.

A second aspect of the present application provides a 3D printer comprising a printhead as described above.

According to the printing head and the 3D printer provided by the embodiment of the utility model, the heating component is arranged on the printing head and used for heating and melting consumable materials in the throat, the heat dissipation component is used for dissipating heat of the throat, the consumable materials transferred by the throat can be ensured to be stably output, the heat dissipation block in the heat dissipation component specifically adopts a trapezoid structure, the length of the heat dissipation fin from the bottom to the top of the heat dissipation block is gradually increased, the heat dissipation area at the top of the heat dissipation block is further increased, the heat dissipation area at the bottom of the heat dissipation block is reduced, different heat dissipation effects are formed at two ends of the heat dissipation block, the better the heat dissipation effect is when the consumable materials in the throat reach the bottom of the heat dissipation block, the preheating and melting can be performed when the consumable materials in the throat reach the bottom of the heat dissipation block, the melting rate of the consumable materials under the high-speed condition is ensured, and the timeliness and the stability of consumable material output are ensured, so that the high-speed printing of the printing head is realized.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model. The foregoing is merely a preferred embodiment of the present application and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the present application.

Claims

1. A printhead, comprising: the device comprises a nozzle, a heating assembly, a heat dissipation assembly and a throat pipe;

the heat dissipation assembly, the throat pipe, the heating assembly and the nozzle are sequentially connected and arranged along a first direction;

the heat dissipation assembly comprises a heat dissipation block, wherein the heat dissipation block comprises a plurality of heat dissipation fins, at least a plurality of the heat dissipation fins are arranged along the first direction, and each heat dissipation fin extends along the second direction; the dimension of the radiating fin close to the heating component in the second direction is smaller than or equal to the dimension of the radiating fin far away from the heating component in the second direction, and the dimension of the radiating fin at least partially close to the heating component in the second direction is smaller than the dimension of the radiating fin far away from the heating component in the second direction.

2. The printhead of claim 1 wherein a plurality of said fins taper in size in said second direction in a direction of said heat sink assembly toward said heating assembly.

3. The printhead of claim 1 wherein said nozzle is removably attached to an end of said heating assembly remote from said heat dissipating assembly;

the throat pipe penetrates through the heat dissipation assembly along the first direction and then stretches into the heating assembly, and the throat pipe is communicated with the nozzle in the heating assembly;

the radiating block further comprises a connecting piece, wherein the connecting piece comprises a first connecting section and a second connecting section which are connected;

the first connecting section is arranged on one side, far away from the heating assembly, of the radiating block and is attached to the radiating fin, and a mounting hole is formed in the side face of the first connecting section;

the second connecting sections are arranged along the first direction and are respectively connected with each radiating fin;

the first through hole is formed in the axis of the connecting piece along the first direction, the first through hole sequentially penetrates through the first connecting section and the second connecting section along the axis, and the throat penetrates through the heat dissipation assembly through the first through hole.

4. The printhead of claim 1 wherein said heat sink is provided with a first temperature measurement aperture, said first temperature measurement aperture being cooperatively coupled to a first temperature sensor, said first temperature sensor being configured to detect a temperature of said heat sink to generate a temperature signal;

the printing head further comprises a fan, the radiating block is provided with a connecting hole, the fan is connected with the radiating block through the connecting hole, the air outlet direction of the fan corresponds to the radiating block, and the fan is used for controlling the air outlet according to a control signal generated by the temperature signal.

5. The printhead of claim 1 wherein a thermal shield is disposed between said heating assembly and said heat sink assembly and is attached to said heat sink on said heat sink adjacent said heating assembly;

the center of the heat insulating plate is provided with a second through hole, and the throat pipe passes through the heat insulating plate through the second through hole.

6. The printhead of claim 1 wherein said heating assembly comprises a heater block, a ceramic heat patch, and a cartridge;

the heating block is arranged in a manner of being attached to the ceramic heating plate, and the clamping seat is sleeved outside the ceramic heating plate and the heating block and used for clamping the ceramic heating plate and the heating block.

7. The printing head according to claim 6, wherein a mounting groove is formed in the outer wall of the heating block, the ceramic heating sheet is arranged in the mounting groove, and heat-conducting silicone grease is smeared on one side, which is attached to the heating block, of the ceramic heating sheet;

the heating block is a nickel-plated copper block;

the heating block is provided with a third through hole along a first direction, and the throat pipe extends into the heating assembly through the third through hole;

a second temperature measuring hole is formed in the side face of the heating block, a second temperature sensor is connected in the second temperature measuring hole, and the second temperature sensor is used for detecting the temperature of the heating block;

the heating block is far away from the threaded hole is formed in one end of the heat radiating component, the heating block is in threaded connection with the nozzle through the threaded hole, and the third through hole is communicated with the nozzle.

8. The printhead of claim 6 wherein a locating hole is formed in a side surface of the heating block, a limiting member is disposed on an inner wall of the clamping seat, and the locating hole is connected with the limiting member in a matching manner, so that the clamping seat is clamped on an outer wall of the heating block.

9. The printhead of claim 6 wherein said heating assembly further comprises a thermal sleeve;

the heat preservation sleeve is sleeved on the outer wall of the clamping seat and is used for preserving heat of the heating block and the ceramic heating piece;

the nozzle is a hardened steel nozzle or a titanium alloy nozzle, and the throat is a titanium alloy throat.

10. A 3D printer comprising a printhead as claimed in any one of claims 1 to 9.