Nozzle kit and stereolithography apparatus

Abstract

This application provides a printhead kit and a 3D printing device. The printhead kit includes a detachably disposed nozzle assembly and a base assembly; the nozzle assembly includes a transport channel and a first thermal coupling portion, the transport channel being used to transport consumables and extending through the first thermal coupling portion along a transport direction; the base assembly includes a second thermal coupling portion, at least two surfaces of the second thermal coupling portion being in contact with the first thermal coupling portion, the first thermal coupling portion and the second thermal coupling portion being thermally coupled for heating the consumables within the transport channel. The 3D printing device includes a 3D printing body and a printhead kit as described in the foregoing embodiments, the printhead kit being connected to the 3D printing body.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and more particularly to a printhead kit and a 3D printing device. Background Technology

[0002] 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a thermoplastic filament, extruding it from a nozzle, and depositing it onto a forming platform or a previously cured material layer to ultimately create the object. During the printing process, consumables (usually filaments) need to be introduced through the feed end of the nozzle assembly and further melted and extruded at the nozzle. For multi-color 3D printing scenarios, how to achieve multiple nozzle devices corresponding to multiple filaments is a consideration for those skilled in the art. Utility Model Content

[0003] To address the problems in the prior art, embodiments of this application provide a printhead kit and a 3D printing device capable of multi-color printing.

[0004] This application provides a nozzle kit, which includes a detachably disposed nozzle assembly and a base assembly, wherein:

[0005] The nozzle assembly includes a transmission channel and a first thermal coupling part. The transmission channel is used to transmit consumables and is disposed through the first thermal coupling part along a transmission direction.

[0006] The base assembly includes a second thermal coupling part, at least two surfaces of which are in contact with the first thermal coupling part. The first thermal coupling part and the second thermal coupling part are thermally coupled to heat the consumables in the transmission channel.

[0007] In one embodiment, at least two surfaces of the second thermal coupling portion are two side mating surfaces, which are configured to be spaced apart along the mating direction for clamping the first thermal coupling portion.

[0008] In one embodiment, the second thermal coupling part further includes a bottom mating surface, which is located between and connected to the two side mating surfaces along the mating direction. The two side mating surfaces are located on the same side of the bottom mating surface to form an assembly cavity, and the first thermal coupling part is disposed in the assembly cavity.

[0009] In one embodiment, the first thermal coupling portion has a width along the mating direction, and the multiple widths of the first thermal coupling portion along the transmission direction are not completely the same, and the second thermal coupling portion has an assembly cavity that extends through the transmission direction.

[0010] In one embodiment, the width of the portion of the first thermal coupling part located outside the assembly cavity is greater than the width of the portion of the first thermal coupling part located inside the assembly cavity, or the width of the portion of the first thermal coupling part located upstream along the transmission direction is greater than the width of the portion of the first thermal coupling part located downstream along the transmission direction.

[0011] In one embodiment, the first thermal coupling portion includes a first portion, a second portion, and a third portion arranged sequentially along the transmission direction. The width of the first portion and the width of the third portion are respectively greater than the width of the second portion. The second portion is configured to be disposed within the assembly cavity, and the first portion and the third portion are configured to be disposed outside the assembly cavity.

[0012] In one embodiment, the first thermal coupling portion has a through hole extending through it along the transmission direction, the through hole being used to form the transmission channel.

[0013] In one embodiment, the second thermal coupling part includes a heat-conducting part and a heat-generating part. The heat-conducting part has the assembly cavity. The heat-generating part is disposed on the outside of the heat-conducting part away from the assembly cavity along the mating direction. The heat-generating part is thermally coupled to the heat-conducting part. The heat-conducting part includes a side mating surface and a bottom mating surface for thermal coupling with the first thermal coupling part.

[0014] In one embodiment, there are multiple nozzle assemblies, each of which has the first thermal coupling portion. One nozzle assembly is connected to one base assembly, and the remaining nozzle assemblies are separate from the base assembly.

[0015] This application also provides a stereoscopic printing device, which includes a stereoscopic printing body and a printhead kit as described in any of the foregoing embodiments, the printhead kit being connected to the stereoscopic printing body.

[0016] Understandably, the printhead kit provided in this application uses a nozzle assembly and a base assembly to achieve filament extrusion printing. The nozzle assembly and the base assembly are configured to be detachably arranged. The nozzle assembly has a transport channel, and different transport channels corresponding to different nozzle assemblies can simultaneously accommodate different filaments (e.g., different colors). By selecting a suitable nozzle assembly and connecting it to the base assembly, printing of the corresponding filament can be achieved. By changing different nozzle assemblies connected to the base assembly, the printing filament can be changed. Furthermore, at least two surfaces of the second thermal coupling part are in contact with the first thermal coupling part, so that the first thermal coupling part and the second thermal coupling part are thermally coupled to heat the filament in the transport channel, thereby achieving cooperation between the base assembly and the nozzle assembly during the filament heating process. Attached Figure Description

[0017] Figure 1 This is a perspective view of the nozzle kit provided in the embodiments of this application.

[0018] Figure 2 This is a partial perspective view of the nozzle kit provided in an embodiment of this application.

[0019] Figure 3 This is a perspective view of the base assembly provided in an embodiment of this application.

[0020] Figure 4 This is a perspective view of the nozzle assembly provided in an embodiment of this application.

[0021] Figure 5 This is a partial perspective view of the base assembly provided in an embodiment of this application.

[0022] Figure 6 for Figure 5 A cross-sectional view along the VI-VI direction.

[0023] Figure 7 for Figure 5 A cross-sectional view along direction VII-VII.

[0024] Figure 8 A schematic diagram of a stereoscopic printing device provided in an embodiment of this application.

[0025] Key component symbols: 10, Nozzle assembly; 100, Transmission channel; 11, Base assembly; 110, Second thermal coupling part; 1100, Assembly cavity; 1101, Heating part; 1102, Heat-conducting part; 11021, Bottom mating surface; 11022, Side mating surface; 11023, Mounting slot; 111, First bracket; 112, Mounting plate; 113, Alignment part; 114, First air-cooling structure; 1140, Air outlet part; 115, Second air-cooling structure; 1150, Fan part; 1161, First clearance channel ; 1162, Second clearance channel; 12, Nozzle assembly; 120, First thermal coupling part; 1201, First part; 1202, Second part; 1203, Third part; 1204, Through hole; 121, Second bracket; 122, Heat dissipation part; 123, Extrusion part; 124, Material guide part; 125, Pipe; 126, Nozzle part; 2, Stereoscopic printing equipment; 20, Stereoscopic printing body; 21, Housing; 22, Drive assembly; 23, Forming platform; Z, Conveying direction; Y, Mating direction; X, Installation direction.

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0027] The following description will be given with reference to the accompanying drawings for a more complete description of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the present application. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but without excluding the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant technology and in the content of this application, and should not be interpreted as having an idealized or overly formal meaning.

[0028] Typically, 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a thermoplastic filament, extruding it from a nozzle, and depositing it onto a forming platform or a previously solidified layer of material to ultimately create the object. During the printing process, consumables (usually filaments) need to be introduced through the feed end of the nozzle assembly and further melted and extruded at the nozzle. For multi-color 3D printing scenarios, how to achieve multiple nozzle devices corresponding to multiple filaments is a consideration for those skilled in the art.

[0029] Correspondingly, the nozzle kit provided in this application embodiment includes a detachable nozzle assembly and a base assembly. The nozzle kit includes a detachable nozzle assembly and a base assembly; the nozzle assembly includes a transmission channel and a first thermal coupling portion, the transmission channel being used to transmit consumables and extending through the first thermal coupling portion along a transmission direction; the base assembly includes a second thermal coupling portion, at least two surfaces of the second thermal coupling portion being in contact with the first thermal coupling portion, the first thermal coupling portion and the second thermal coupling portion being thermally coupled for heating the consumables within the transmission channel.

[0030] Furthermore, the nozzle assembly and the base assembly are configured to be detachably arranged. The nozzle assembly has a transmission channel, and different transmission channels corresponding to different nozzle assemblies can simultaneously accommodate different consumables (e.g., different colors). By selecting a suitable nozzle assembly to connect and cooperate with the base assembly, printing on the corresponding consumable can be achieved. By replacing different nozzle assemblies connected to the base assembly, the printing consumable can be replaced. Furthermore, at least two surfaces of the second thermal coupling part are in contact with the first thermal coupling part, so that the first thermal coupling part and the second thermal coupling part are thermally coupled to heat the consumable in the transmission channel, thereby achieving cooperation between the base assembly and the nozzle assembly during the consumable heating process.

[0031] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.

[0032] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, this application embodiment provides a nozzle kit 10, which includes a separable base assembly 11 and a nozzle assembly 12, the base assembly 11 and the nozzle assembly 12 being detachably connected.

[0034] In this embodiment, there are multiple nozzle assemblies 12, each of which has a first thermal coupling part 120. One nozzle assembly 12 is connected to a base assembly 11, while the remaining nozzle assemblies 12 are separate from the base assembly 11.

[0035] Understandably, each nozzle assembly 12 can be configured to hold one filament (not shown), and different nozzle assemblies 12 can be matched with different filaments. When a nozzle assembly 12 is engaged with a base assembly 11, the base assembly 11 can engage with the nozzle assembly 12 to achieve filament extrusion printing. At this time, other nozzle assemblies 12 can be in a standby state. When it is necessary to change the filament, the base assembly 11 is directly separated from the connected nozzle assembly 12, and then the base assembly 11 is connected to another nozzle assembly 12 to proceed to the next printing step, thereby achieving multi-color printing.

[0036] In one embodiment, the nozzle assembly 12 includes a transmission channel 100 and a first thermal coupling portion 120. The transmission channel 100 is used to transmit consumables and is disposed through the first thermal coupling portion 120 along the transmission direction Z. The base assembly 11 includes a second thermal coupling portion 110. At least two surfaces of the second thermal coupling portion 110 are in contact with the first thermal coupling portion 120. The first thermal coupling portion 120 and the second thermal coupling portion 110 are thermally coupled to heat the consumables in the transmission channel 100.

[0037] In one embodiment, the first thermal coupling portion 120 has a width along the mating direction Y, and the widths of the first thermal coupling portion 120 along the transmission direction Z are not exactly the same, the transmission direction Z intersects the mating direction Y. The second thermal coupling portion 110 has an assembly cavity 1100 that extends through along the transmission direction Z, and the first thermal coupling portion 120 is disposed in the assembly cavity 1100 and engages with the second thermal coupling portion 110. The first thermal coupling portion 120 and / or the second thermal coupling portion 110 are configured to generate heat for heating consumables within the transmission channel 100.

[0038] Understandably, the printhead kit 10 provided in this application is used to achieve printing by cooperating with the base assembly 11 via the nozzle assembly 12. The nozzle assembly 12 and the base assembly 11 are configured to be detachably arranged. The nozzle assembly 12 has a transport channel 100, and different transport channels 100 corresponding to different nozzle assemblies 12 can respectively accommodate different consumables (e.g., consumables of different colors). By replacing the nozzle assembly 12 connected to the base assembly 11, consumable switching during multi-color printing is achieved.

[0039] Furthermore, the first thermal coupling portion 120 extends along the transmission direction Z and has a not entirely identical width along the mating direction Y. That is, the first thermal coupling portion 120 has a structure that is protruding or recessed along the transmission direction Z compared to the mating direction Y. This protruding or recessed structure can mate with the recessed or protruding structure of the assembly cavity 1100, so that the first thermal coupling portion 120 and the second thermal coupling portion 110 are engaged, connecting the nozzle assembly 12 and the base assembly 11. The first thermal coupling portion 120 and / or the second thermal coupling portion 110 are configured to generate heat. The first thermal coupling portion 120 and the second thermal coupling portion 110 are thermally coupled to heat the consumables in the transmission channel 100, so as to realize the mating of the base assembly 11 and the nozzle assembly 12 during the consumable heating process.

[0040] For ease of understanding, the embodiments of this application introduce the transmission direction Z, mating direction Y, and installation direction X for description. The transmission direction Z, mating direction Y, and installation direction X are three non-parallel directions in the spatial coordinate system. In subsequent embodiments, the transmission direction Z, mating direction Y, and installation direction X are described as three mutually perpendicular reference directions in the three-dimensional Cartesian coordinate system. The directions shown in the embodiments of this application are used to help understand the relative positions of the components, but do not limit their specific directions.

[0041] Further integration Figure 3 As shown, in one embodiment, the base assembly 11 further includes a first bracket 111, a mounting plate 112, an alignment member 113, a first air-cooling structure 114, and a second air-cooling structure 115. The mounting plate 112, the alignment member 113, the first air-cooling structure 114, and the second air-cooling structure 115 are all connected to the first bracket 111 and disposed on the same side of the first bracket 111 along the installation direction X. The second thermal coupling part 110 is connected to the first bracket 111 through the mounting plate 112.

[0042] In one embodiment, a first air-cooling structure 114 is disposed at the end of the first support 111 along the conveying direction Z, and is configured to correspond to the nozzle portion 126 of the nozzle assembly 12 to achieve rapid cooling of the extruded consumable. The first air-cooling structure 114 includes two air outlets 1140, which are spaced apart along the mating direction Y. The air outlets of the two air outlets 1140 can be configured to have a specific angle to form vortices. Those skilled in the art will know that this is certainly achievable, and will not be elaborated here.

[0043] In one embodiment, the mounting plate 112 is disposed between the two air outlets 1140 of the first air-cooling structure 114 along the mating direction Y, and the mounting plate 112 is fixed to the first bracket 111. The mounting plate 112 may be provided with multiple mounting points (not shown) to improve the installation strength and installation efficiency of the second thermal coupling part 110.

[0044] In one embodiment, the second air-cooling structure 115 is positioned upstream of the first air-cooling structure 114 along the transmission direction Z, and is configured to correspond to the heat dissipation portion 122 of the nozzle assembly 12, thereby improving the heat dissipation efficiency of the nozzle assembly 12. The second air-cooling structure 115 includes a fan 1150, which is capable of blowing airflow toward the heat dissipation portion 122 of the nozzle assembly 12.

[0045] In one embodiment, the alignment member 113 is positioned upstream of the first air-cooling structure 114 along the transmission direction Z. The alignment member 113 is connected to the first bracket 111 and protrudes relative to the first bracket 111 along the installation direction X. A first clearance channel 1161 is also formed between the two air outlets 1140 of the first air-cooling structure 114. The alignment member 113 and the second air-cooling structure 115 are spaced apart along the matching direction. The alignment member 113 is positioned along the transmission direction Z corresponding to one air outlet 1140, and the second air-cooling structure 115 is positioned along the transmission direction Z corresponding to the other air outlet 1140, thereby forming a second clearance channel 1162 between the alignment member 113 and the second air-cooling structure 115. The first clearance channel 1161 and the second clearance channel 1162 communicate along the transmission direction Z, allowing the nozzle assembly 12 to be positioned accordingly.

[0046] In one embodiment, the second thermal coupling portion 110 includes a heat-conducting portion 1102 and a heat-generating portion 1101, wherein the heat-conducting portion 1102 has an assembly cavity 1100. The heat-generating portion 1101 is disposed along the mating direction Y on the outer side of the heat-conducting portion 1102 away from the assembly cavity 1100, and the heat-generating portion 1101 is thermally coupled to the heat-conducting portion 1102, and the heat-conducting portion 1102 is thermally coupled to the first thermal coupling portion 120.

[0047] In one embodiment, the heat-conducting part 1102 includes a bottom mating surface 11021 and two side mating surfaces 11022. The two side mating surfaces 11022 are located on both sides of the bottom mating surface 11021 along the mating direction Y and are connected to the bottom mating surface 11021. The bottom mating surface 11021 and the two side mating surfaces 11022 enclose an assembly cavity 1100.

[0048] In this embodiment, the bottom mating surface 11021 is located on the same side of the two side mating surfaces 11022 along the installation direction X. The two side mating surfaces 11022 are spaced apart along the mating direction Y. The bottom mating surface 11021 is located between the two side mating surfaces 11022 along the mating direction Y. One side mating surface 11022, the bottom mating surface 11021, and the other side mating surface 11022 are connected in sequence. The two side mating surfaces 11022 and the bottom mating surface 11021 are configured to be able to fit with the first thermal coupling part 120.

[0049] In this embodiment, the second thermal coupling part 110 is connected to the first bracket 111 via a mounting plate 112, and the bottom mating surface 11021 is fixed to the mounting plate 112 by fasteners (not shown, such as bolts). Two side mating surfaces 11022 are located on the same side of the bottom mating surface 11021 away from the mounting plate 112 along the installation direction X. The other end of the two side mating surfaces 11022 away from the mounting plate 112 along the installation direction X is an open structure for allowing the first thermal coupling part 120 to enter and / or exit.

[0050] In this embodiment, each side mating surface 11022 has a mounting slot 11023 on the side opposite to the assembly cavity 1100 along the mating direction Y. The shape of the heating element 1101 roughly matches the shape of the mounting slot 11023. The heating element 1101 is disposed in the mounting slot 11023 and is largely enclosed by the heat-conducting element 1102. The heating element 1101 can be a thermal resistor, an electrothermal ceramic, or other feasible heating structure. The heating element 1101 generates heat when driven, and the heat is transferred to the heat-conducting element 1102, causing the heat-conducting element 1102 to heat up. The heat can be further conducted to the first thermal coupling structure via the heat-conducting element 1102.

[0051] Further integration Figures 4 to 7 As shown, in one embodiment, the nozzle assembly 12 further includes a second support 121, a heat dissipation section 122, an extrusion section 123, a material guide section 124, a nozzle section 126, and a conduit 125. The second thermal coupling section 110, the heat dissipation section, the extrusion section 123, the material guide section 124, and the conduit 125 are all connected to the second support 121, and the nozzle section 126 and the conduit 125 are respectively connected to the second thermal coupling section 110.

[0052] In one embodiment, a guide section 124 is located upstream of the feed inlet of the second support 121 along the conveying direction Z. A heat dissipation section 122 is connected downstream of the second support 121 along the conveying direction Z relative to the guide section 124. A first thermal coupling section 120 is connected downstream of the heat dissipation section 122 along the conveying direction Z relative to the second support 121. A pipe 125 is connected to the guide section 124. The pipe 125 extends further along the conveying direction Z and passes through the second support 121 and the heat dissipation section 122 to connect with the first thermal coupling section 120. A nozzle section 126 is connected to the end of the second thermal coupling section 110 away from the pipe 125 along the conveying direction Z. A conveying channel 100 passes through the pipe 125, the second thermal coupling section 110, and the nozzle section 126 to realize the transfer and extrusion of consumables. An extrusion section 123 is located on the second support 121, between the guide section 124 and the heat dissipation section 122, and penetrates into the conveying channel 100 to clamp and extrude consumables.

[0053] In one embodiment, the first thermal coupling part 120 has a through hole 1204 extending through it along the transmission direction Z, and the through hole 1204 is used to form a transmission channel 100.

[0054] Understandably, the first thermal coupling part 120 can be an integral structure, meaning that when the consumable passes through the first thermal coupling part 120, it can directly contact and thermally couple with the first thermal coupling part 120. This reduces the number of layers through which heat is transferred from the second thermal coupling part 110 to the first thermal coupling part 120, thereby reducing heat loss when transferring between different layers or different materials and improving the thermal efficiency of the first thermal coupling part 120 in heating the consumable.

[0055] In one embodiment, the width of the portion of the first thermal coupling portion 120 located outside the assembly cavity 1100 is greater than the width of the portion of the first thermal coupling portion 120 located inside the assembly cavity 1100.

[0056] Understandably, the first thermal coupling portion 120 is configured to engage with the second thermal coupling portion 110, thereby enabling the installation of the nozzle assembly 12 and the base assembly 11. By making the width of the portion of the first thermal coupling portion 120 outside the assembly cavity 1100 smaller and the width of the portion inside the assembly cavity 1100 larger, the first thermal coupling portion 120 has a shape that matches the second thermal coupling portion 110, allowing the first thermal coupling portion 120 to be precisely placed into the assembly cavity 1100.

[0057] In one embodiment, the width of the upstream portion of the first thermal coupling part 120 along the transmission direction Z is greater than the width of the downstream portion of the first thermal coupling part 120 along the transmission direction Z.

[0058] Understandably, the first thermal coupling part 120 is typically configured to be positioned along the transmission direction Z during operation, which usually corresponds to the vertical direction or the direction of gravity under normal use. This causes the nozzle assembly 12 to tend to move downward along the transmission direction Z under its own gravity. By making the width of the downstream portion of the first thermal coupling part 120 along the transmission direction Z smaller, this portion can be placed within the assembly cavity 1100. At the same time, by making the width of the upstream portion of the first thermal coupling part 120 along the transmission direction Z larger, this portion can abut against the second thermal coupling part 110, thereby fixing the nozzle assembly 12.

[0059] In one embodiment, the first thermal coupling part 120 may have a shape that is wider vertically and narrower in the middle along the transmission direction Z, in order to improve the installation accuracy of the first thermal coupling part 120 and the second thermal coupling part 110.

[0060] In this embodiment, the first thermal coupling part 120 includes a first part 1201, a second part 1202, and a third part 1203 arranged sequentially along the transmission direction Z. The width of the first part 1201 and the width of the third part 1203 are both greater than the width of the second part 1202. The second part 1202 is configured to be disposed inside the assembly cavity 1100, while the first part 1201 and the third part 1203 are configured to be disposed outside the assembly cavity 1100.

[0061] Understandably, the length of the second part 1202 along the transport direction Z is constructed to be approximately equal to the length of the assembly cavity 1100 along the transport direction Z, so that the second part 1202 can be precisely accommodated in the assembly cavity 1100. A stepped structure is formed between the first part 1201 and the second part 1202, and a stepped structure is also formed between the third part 1203 and the second part 1202. When the second part 1202 is assembled into the assembly cavity 1100, the first part 1201 and the third part 1203 abut against the two ends of the second thermal coupling part 110 along the transport direction Z, respectively. This locks the first thermal coupling part 120 and the second thermal coupling part 110 together, preventing wobbling between the assembled nozzle assembly 12 and the base assembly 11, and improving printing accuracy.

[0062] In this embodiment, the cross-sectional shape of the second part 1202 in the plane defined by the transmission direction Z and the mating direction Y is approximately strip-shaped. In other embodiments, the plane defined by the transmission direction Z and the mating direction Y of the first thermal coupling part 120 can also be an inverted trapezoid, a sawtooth shape, or other shapes, and the assembly cavity 1100 can also have other shapes accordingly. As those skilled in the art will understand, it is sufficient that the first thermal coupling part 120 and the second thermal coupling part 110 match in shape and can be locked together, which will not be elaborated here.

[0063] In one embodiment, the first thermal coupling portion 120 may have the same thickness or width along the mounting direction X, or it may have different thicknesses or widths, which will not be elaborated here.

[0064] In this embodiment, the lower end of the first thermal coupling part 120 along the transmission direction Z can be in the shape of a boss, for matching with the nozzle part 126; the lower end of the first thermal coupling part 120 along the transmission direction Z can also be in other shapes, which will not be described in detail here.

[0065] Further integration Figure 2 As shown, in this embodiment, the first thermal coupling part 120 is configured to conduct heat, and the second thermal coupling part 110 is configured to generate heat. That is, the heating part 1101 emits heat, and the first thermal coupling part 120 is thermally coupled to the heating part 1101 through the thermally conducting part 1102, so that the heat emitted by the heating part 1101 is transferred to the consumable material disposed in the first thermal coupling part 120, further softening the consumable material and extruding it from the nozzle part 126 to achieve printing.

[0066] In other embodiments, the first thermal coupling portion 120 may also be configured to generate heat, and the second thermal coupling portion 110 may be used to fix the first thermal coupling portion 120. This can be achieved by adding or nesting a heat-generating structure (such as a ceramic heating ring or a thermal resistor) to the first thermal coupling portion 120. Alternatively, both the first thermal coupling portion 120 and the second thermal coupling portion 110 may be configured to conduct heat, that is, the first thermal coupling portion 120 and the second thermal coupling portion 110 may be heated synchronously to improve heating efficiency.

[0067] Further integration Figure 8 As shown, this application embodiment also provides a stereo printing device 2, which includes a stereo printing body 20 and a nozzle kit 10 as described in any of the foregoing embodiments, the nozzle kit 10 being connected to the stereo printing body 20.

[0068] In one embodiment, the 3D printing body 20 includes a housing 21, a drive assembly 22, and a forming platform 23. The drive assembly 22 and the forming platform 23 are respectively connected to the housing 21, and relative movement is possible between the drive assembly 22 and the forming platform 23. The base assembly 11 of the nozzle kit 10 is connected to the drive assembly 22. The remaining nozzle assemblies 12 that are not connected to the base assembly 11 are spaced apart on the housing 21. The drive assembly 22 can drive the base assembly 11 to move closer to or further away from these nozzle assemblies 12, thereby replacing the nozzle assemblies 12. At the same time, the drive assembly 22 can drive the base assembly 11 connected to the nozzle assemblies 12 to move relative to the forming platform 23 in three-dimensional space, for extruding molten filament at a suitable position, thereby realizing 3D printing.

[0069] Understandably, the 3D printing device 2 of this application can achieve 3D printing by separating the base assembly 11 and the nozzle assembly 12 in the nozzle kit 10 to replace consumables.

[0070] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A showerhead assembly, comprising: Includes a detachable nozzle assembly and a base assembly, wherein: The nozzle assembly includes a transmission channel and a first thermal coupling part. The transmission channel is used to transmit consumables and is disposed through the first thermal coupling part along a transmission direction. The base assembly includes a second thermal coupling part, at least two surfaces of which are in contact with the first thermal coupling part. The first thermal coupling part and the second thermal coupling part are thermally coupled to heat the consumables in the transmission channel.

2. The showerhead assembly of claim 1, wherein, At least two surfaces of the second thermal coupling part are two side mating surfaces, and the two side mating surfaces are configured to be spaced apart along the mating direction for clamping the first thermal coupling part.

3. The showerhead assembly of claim 2, wherein, The second thermal coupling part further includes a bottom mating surface, which is located between the two side mating surfaces along the mating direction and connected to the two side mating surfaces. The two side mating surfaces are located on the same side of the bottom mating surface to form an assembly cavity, and the first thermal coupling part is disposed in the assembly cavity.

4. The showerhead assembly of claim 1, wherein, The first thermal coupling part has a width along the mating direction, and the widths of the first thermal coupling part along the transmission direction are not exactly the same. The second thermal coupling part has an assembly cavity that extends through the transmission direction.

5. The showerhead assembly of claim 4, wherein, The width of the portion of the first thermal coupling part located outside the assembly cavity is greater than the width of the portion of the first thermal coupling part located inside the assembly cavity, or the width of the portion of the first thermal coupling part located upstream along the transmission direction is greater than the width of the portion of the first thermal coupling part located downstream along the transmission direction.

6. The showerhead assembly of claim 4, wherein, The first thermal coupling part includes a first part, a second part, and a third part arranged sequentially along the transmission direction. The width of the first part and the width of the third part are respectively greater than the width of the second part. The second part is configured to be disposed inside the assembly cavity, and the first part and the third part are configured to be disposed outside the assembly cavity.

7. The showerhead assembly of claim 1, wherein, The first thermal coupling part has a through hole extending through it along the transmission direction, and the through hole is used to form the transmission channel.

8. The showerhead assembly of claim 4, wherein, The second thermal coupling part includes a heat-conducting part and a heat-generating part. The heat-conducting part has the assembly cavity. The heat-generating part is located on the outside of the heat-conducting part away from the assembly cavity along the mating direction. The heat-generating part is thermally coupled to the heat-conducting part. The heat-conducting part includes a side mating surface and a bottom mating surface for thermal coupling with the first thermal coupling part.

9. The showerhead assembly of claim 1, wherein, The number of nozzle assemblies is multiple, and each of the multiple nozzle assemblies has the first thermal coupling part. One nozzle assembly is connected to one base assembly, and the remaining nozzle assemblies are separate from the base assembly.

10. A stereolithography apparatus, characterized in that It includes a stereoprinting body and a printhead assembly as described in any one of claims 1 to 9, the printhead assembly being connected to the stereoprinting body.

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