Heating assembly, nozzle mechanism and three-dimensional printer

Abstract

The utility model discloses a heating assembly, a nozzle mechanism and a three-dimensional printer, and relates to the technical field of three-dimensional printing. The heating assembly comprises a heating piece, a heating channel set extending in the axial direction of the heating assembly is formed in the heating piece, the heating channel set comprises a first channel and a second channel, the first channel is located on the inner side of the second channel, the first channel is located in the center area of the heating piece, and the sectional area of the first channel is smaller than that of the consumable; the second channel is arranged around the peripheral side of the first channel, and / or a connecting channel is arranged between the first channel and the second channel. According to the heating assembly, melting of the consumable inner core can be accelerated, the consumable melting time is shortened, and the printing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of three-dimensional printing technology, and in particular to a heating component, a nozzle mechanism and a three-dimensional printer. Background Art

[0002] During the operation of a three-dimensional (3D) printer, a nozzle module may be used to heat and melt a solid filament to form a molten filament, which is then extruded through an output end of the nozzle module.

[0003] However, the nozzle module in the existing 3D printer has the problem of long heating time and slow melting of the filament core when heating and melting the filament, which in turn affects the 3D printing speed. Utility Model Content

[0004] The present application provides a heating component, a nozzle mechanism and a 3D printer, which can accelerate the melting of the inner core of the consumable material, shorten the melting time of the consumable material, and improve the efficiency of 3D printing.

[0005] The present application provides a heating assembly, comprising a heating element, wherein the heating element is provided with a heating channel group extending axially along the heating element, the heating channel group comprising a first channel and a second channel, the first channel being located inside the second channel, the first channel being located in a central region of the heating element, and the cross-sectional area of ​​the first channel being smaller than the cross-sectional area of ​​a consumable;

[0006] The second channel is arranged around the circumference of the first channel, and / or a connecting channel is provided between the first channel and the second channel.

[0007] In some possible embodiments, the heating channel group includes one first channel and at least two second channels, at least two second channels are distributed around the first channel, and the connecting channel is provided between any second channel and the first channel.

[0008] In some possible implementations, the heating channel group includes one first channel and four second channels, the four second channels are distributed around the first channel, and the connecting channels are provided between the four second channels and the first channel.

[0009] In some possible implementations, the heating channel group includes at least one first channel and at least one second channel, and the at least one second channel is disposed around the circumference of the at least one first channel.

[0010] In some possible implementations, the heating channel group includes two first channels and two second channels, and the two first channels are distributed around the central axis of the heating element;

[0011] The two second channels are arranged around the circumference of the two first channels.

[0012] In some possible implementations, the second channel includes a first heat-conducting surface and a second heat-conducting surface that are opposite to each other, the first heat-conducting surface is located on the inner side of the second heat-conducting surface, and the first heat-conducting surface is close to the first channel;

[0013] The first heat-conducting surface is configured with a first convex portion convex toward the second heat-conducting surface or a first concave portion concave toward the direction away from the second heat-conducting surface, and / or the second heat-conducting surface is configured with a second concave portion concave toward the direction away from the first heat-conducting surface or a second convex portion convex toward the first heat-conducting surface.

[0014] In some possible implementations, the heating assembly further includes a preheating channel group, the preheating channel group is connected to the input end of the heating channel group, and the preheating channel group includes at least two groups of structural segments;

[0015] In any two adjacent groups of the structural segments, the cross-sectional area of ​​the group of the structural segments away from the heating channel group is larger than the cross-sectional area of ​​the group of the structural segments close to the heating channel group, and the cross-sections are perpendicular to the axial direction of the heating component.

[0016] In some possible implementations, the heating assembly further includes a preheating element, the preheating element being connected to an end of the heating element close to the input end, and the preheating channel group being opened in the preheating element;

[0017] Alternatively, the preheating channel group is opened in the heating element.

[0018] In addition, the present application also provides a nozzle mechanism, including a throat assembly, a nozzle, and the heating assembly provided in the above embodiments, wherein the heating assembly is connected between the throat assembly and the nozzle.

[0019] In addition, the present application also provides a three-dimensional printer, comprising the heating assembly provided in the above embodiments.

[0020] Beneficial effects of the present application: In the heating component provided by the present application, the heating channel group includes a first channel and a second channel, wherein the first channel is located on the inner side of the second channel, the first channel is located in the central area of ​​the heating element, and the cross-sectional area of ​​the first channel is smaller than the cross-sectional area of ​​the consumable. The second channel can be arranged around the circumference of the first channel, and / or a connecting channel is provided between the second channel and the first channel. When the consumable passes through the heating channel group, since the cross-sectional area of ​​the first channel is smaller than the cross-sectional area of ​​the consumable, the consumable can be dispersed to the first channel and the second channel, wherein the first channel can contact and exchange heat with the part of the consumable close to the inner core, shortening the heat conduction distance between the heating element and the inner core of the consumable, increasing the melting speed of the inner core of the consumable, shortening the melting time of the inner core of the consumable, and at the same time, increasing the heat exchange area between the heating element and the consumable, thereby improving the overall melting efficiency of the consumable and meeting the high-speed printing requirements of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A bottom view schematic diagram of the heating assembly in some embodiments is shown;

[0023] Figure 2 Shown Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0024] Figure 3 Shown Figure 2 A schematic diagram of the partially enlarged structure of part B;

[0025] Figure 4 A bottom view schematic diagram of the heating element in some embodiments is shown;

[0026] Figure 5 Schematic diagrams of the bottom view of the heating element in other embodiments are shown;

[0027] Figure 6 Schematic diagrams of the bottom view of the heating element in some other embodiments are shown;

[0028] Figure 7 Shown Figure 6 A schematic diagram of the partially enlarged structure of part C in the middle;

[0029] Figure 8 A partial structural schematic diagram of the second heating channel in some embodiments is shown;

[0030] Figure 9 shows a schematic cross-sectional structure diagram of a heating element in some embodiments;

[0031] Figure 10 Schematic diagrams of the bottom view of the heating element in some further embodiments are shown;

[0032] Figure 11 shows a schematic cross-sectional structure diagram of a heating assembly in some embodiments;

[0033] Figure 12 Schematic diagrams of the top view of the preheating element in some embodiments are shown;

[0034] Figure 13 Schematic diagrams of the cross-sectional structure of the nozzle mechanism in some embodiments are shown.

[0035] Description of main component symbols:

[0036] 1000-heating component;

[0037] 100 - heating element; 110 - heating channel group; 1101 - input end; 1102 - output end; 111 - first channel; 112 - second channel; 113 - connecting channel; 1131 - main channel; 1132 - branch channel; 1141 - first heat-conducting surface; 11411 - first convex portion; 11412 - first concave portion; 1142 - second heat-conducting surface; 11421 - second concave portion; 11422 - second convex portion;

[0038] 200-preheating element; 210-preheating channel group; 211-first structural section; 2111-first preheating channel; 2112-second preheating channel; 212-second structural section; 213-third structural section;

[0039] 2000-throat assembly; 2001-flow channel; 2100-first connecting pipe; 2200-throat; 2300-second connecting pipe;

[0040] 3000-nozzle; 3001-spray hole;

[0041] L-axis line. DETAILED DESCRIPTION

[0042] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0046] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0047] like Figures 1 to 13 As shown, a heating assembly 1000 provided in an embodiment can be applied to the nozzle mechanism of a 3D printer to heat and melt the consumables required for 3D printing. The 3D printer can be any type of printer, including but not limited to a fused deposition modeling (FDM) printer.

[0048] In an embodiment, the heating assembly 1000 includes a heating element 100, in which a heating channel group 110 is defined. The heating channel group 110 may extend axially along the heating element 1000. The axial direction of the heating element 1000 may refer to the extension direction of the axis L of the heating element 1000. The central area of ​​the heating element 100 is the area at the axis L. In some embodiments, the central axis of the heating element 100 may coincide with the axis L of the heating element 1000.

[0049] In an embodiment, the heating channel group 110 may include a first channel 111 and a second channel 112. The first channel 111 is located inside the second channel 112 and in the center of the heating element 100, i.e., the first channel 111 may be located on the side of the second channel 112 that is close to the inner core of the consumable. The cross-sectional area of ​​the first channel 111 may be smaller than the cross-sectional area of ​​the consumable, and each cross-sectional area is perpendicular to the axis L.

[0050] In some embodiments, the second channel 112 may be disposed around the circumference of the first channel 111 . And / or, a connecting channel 113 may be provided between the second channel 112 and the first channel 111 , and the second channel 112 and the first channel 111 may be connected through the connecting channel 113 .

[0051] During use, the consumables can pass through the heating channel group 110 and come into contact with the inner wall of the heating channel group 110. Since the cross-sectional area of ​​the first channel 111 is smaller than the cross-sectional area of ​​the consumables, the consumables can be dispersed into the first channel 111 and the second channel 112. The first channel 111 can contact and exchange heat with the portion of the consumables close to the inner core, thereby shortening the heat conduction distance between the heating element 100 and the inner core of the consumables, increasing the melting speed of the inner core of the consumables, shortening the melting time of the inner core of the consumables, and reducing the thermal insulation effect of the outer surface material of the consumables on the inner core of the consumables. At the same time, the heat exchange area between the heating element 100 and the consumables can be increased, thereby improving the overall melting efficiency of the consumables and meeting the high-speed printing requirements of the 3D printer.

[0052] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in some embodiments, the heating channel group 110 may be configured with an input end 1101 and an output end 1102 along the axial direction of the heating assembly 1000. The input end 1101 and the output end 1102 are both connected to the external environment. The input end 1101 allows consumables to be input into the heating channel group 110, and the consumables melted by the heating element 100 can be output through the output end 1102.

[0053] In some embodiments, the heating channel group 110 may include a first channel 111 and at least two second channels 112. The first channel 111 and the second channel 112 both extend axially along the heating component 1000 and extend from the input end 1101 to the output end 1102. The at least two second channels 112 may be distributed around the first channel 111, and a connecting channel 113 may be provided between any of the second channels 112 and the first channel 111. In some embodiments, the first channel 111 and the second channel 112 may both be channels with a generally circular cross-section. The connecting channel 113 may extend radially along the heating element 100 and be a channel with a long strip cross-section. During use, consumables may pass through the first channel 111, the at least two second channels 112, and the connecting channel 113, and fit against the inner wall of the first channel 111, the inner wall of the at least two second channels 112, and the inner wall of the connecting channel 113. The inner wall of the first channel 111 , the inner wall of the second channel 112 , and the inner wall of the connecting channel 113 can transfer heat in the heating element 100 to the consumables.

[0054] The first channel 111 can contact and exchange heat with the inner core of the consumable. This shortens the heat conduction distance between the heating element 100 and the inner core of the consumable, while also increasing the contact area between the heating element 100 and the consumable, thereby accelerating the melting efficiency of the consumable. While ensuring the melting efficiency of the consumable, the axial length of the heating element 100 can be shortened within the heating assembly 1000, thereby reducing the flow resistance of the consumable and increasing the flow rate of the consumable.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments, the heating channel group 110 may include a first channel 111 and four second channels 112. The four second channels 112 may be evenly distributed around the first channel 111. Connecting channels 113 are provided between the four second channels 112 and the first channel 111. Accordingly, a cross-section of the heating channel group 110 perpendicular to the axial direction of the heating assembly 1000 may be cross-shaped.

[0056] In other embodiments, the four second channels 112 may also be unevenly distributed around the first channel 111 .

[0057] like Figure 1 、 Figure 4 and Figure 5 As shown, in some embodiments, the heating channel group 110 may further include a first channel 111 and three, five, or six second channels 112. The plurality of second channels 112 may be evenly or unevenly distributed around the first channel 111. A connecting channel 113 is provided between each second channel 112 and the first channel 111, and the connecting channel 113 is connected to each other.

[0058] like Figure 1 and Figure 5 As shown, in some embodiments, the connecting channel 113 further includes a main channel 1131 and a plurality of branch channels 1132. The main channel 1131 may extend radially along the heating element 100. Accordingly, a cross-section of the heating channel group 110 perpendicular to the axis L may be shaped like a snowflake, further increasing the contact area between the heating element 100 and the consumable, thereby improving the melting rate of the consumable.

[0059] like Figure 6 、 Figures 9 to 11 As shown, in some embodiments, the heating channel group 110 may include at least one first channel 111 and at least one second channel 112. The first channel 111 and the second channel 112 both extend along the axial direction of the heating assembly 1000, and both the first channel 111 and the second channel 112 extend from the input end 1101 to the output end 1102.

[0060] In particular, at least one first channel 111 is located inside at least one second channel 112, and the first channel 111 is located in the central area of ​​the heating element 100, that is, at least one first channel 111 is located on the side of the at least one second channel 112 close to the inner core of the consumable, and at least one first channel 111 can be arranged around the central axis of the heating element 100. In addition, the second channel 112 can extend along the circumference of the heating element 100, and accordingly, the at least one second channel 112 can be arranged around the circumference of the at least one first channel 111. The cross-section of the first channel 111 perpendicular to the axis L can be circular, and the cross-section of the second channel 112 perpendicular to the axis L can be a portion of a ring. During use, the consumable can pass through the at least one first channel 111 and the at least one second channel 112, and conform to the inner walls of the at least one first channel 111 and the inner walls of the at least one second channel 112. The inner walls of the first channel 111 and the inner walls of the second channel 112 can transfer heat from the heating element 100 to the consumable. The first channel 111 can be positioned close to the inner core of the consumable material, thereby shortening the heat conduction distance between the heating element 100 and the inner core of the consumable material, thereby increasing the melting rate of the inner core of the consumable material. Simultaneously, the contact area between the heating element 100 and the consumable material can be increased, thereby improving the melting efficiency of the consumable material. While ensuring the melting efficiency of the consumable material, the axial length of the heating element 100 can also be shortened within the heating assembly 1000, reducing the flow resistance of the consumable material and increasing the flow rate of the consumable material.

[0061] like Figure 6 and Figure 9As shown, in some embodiments, the heating channel group 110 may include two first channels 111 and two second channels 112. The two first channels 111 are located in the central region of the heating element 100, are spaced apart and arranged side by side, and are symmetrically arranged about the axis L. The two second channels 112 may be arranged around the two first channels 111 and may be symmetrically arranged about the axis L. In addition, the two second channels 112 are isolated from each other, and the second channels 112 are also isolated from the first channels 111.

[0062] In other embodiments, the two second channels 112 may also be asymmetrically arranged about the central axis L.

[0063] like Figure 10 As shown, in some embodiments, the heating channel group 110 may also include one, three, or four first channels 111. When the heating channel group 110 includes one first channel 111, the first channel 111 may be coaxial with the heating element 100. When the heating channel group 110 includes multiple first channels 111, the multiple first channels 111 may be evenly or unevenly distributed around the central axis (i.e., axis L) of the heating element 100, that is, the first channel 111 is located in the central area of ​​the heating element 100.

[0064] In some embodiments, the heating channel group 110 may further include one, three, or four second channels 112. When the heating channel group 110 includes multiple second channels 112, the multiple second channels 112 may be evenly or unevenly distributed around the center area of ​​the first channel 111.

[0065] like Figure 6 、 Figure 7 and Figure 9 As shown, in some embodiments, the second channel 112 may be configured with a first heat-conducting surface 1141 and a second heat-conducting surface 1142 that are relatively arranged, and the first heat-conducting surface 1141 is located on the inner side of the second heat-conducting surface 1142, and the first heat-conducting surface 1141 is close to the first channel 111, that is, the first heat-conducting surface 1141 may be located on the side of the second heat-conducting surface 1142 close to the axis L, that is, the first heat-conducting surface 1141 is located on the side of the second heat-conducting surface 1142 close to the inner core of the consumable.

[0066] In some embodiments, the first heat conducting surface 1141 may be configured with a plurality of first protrusions 11411 protruding toward the second heat conducting surface 1142. This can further increase the contact area between the heating element 100 and the consumables, further improving the melting efficiency of the consumables.

[0067] In some embodiments, the second heat conducting surface 1142 may be configured with a plurality of second recesses 11421 recessed away from the first heat conducting surface 1141 to further increase the contact area between the heating element 100 and the consumables, thereby further improving the melting efficiency of the consumables.

[0068] like Figure 8 As shown, in some embodiments, the first heat conducting surface 1141 may be configured with a plurality of first recesses 11412 that are recessed in a direction away from the second heat conducting surface 1142, and / or the second heat conducting surface 1142 may be configured with a plurality of second protrusions 11422 that protrude in a direction toward the first heat conducting surface 1141. This can further increase the contact area between the heating element 100 and the consumables, further improving the melting efficiency of the consumables.

[0069] In other embodiments, the first heat-conducting surface 1141 may be configured with a plurality of first protrusions 11411 protruding toward the second heat-conducting surface 1142, and the second heat-conducting surface 1142 may be configured with a plurality of second protrusions 11422 protruding toward the first heat-conducting surface 1141. Alternatively, the first heat-conducting surface 1141 may be configured with a plurality of first recesses 11412 recessed toward the second heat-conducting surface 1142, and the second heat-conducting surface 1142 may be configured with a plurality of second recesses 11421 recessed toward the first heat-conducting surface 1141.

[0070] like Figure 2 、 Figure 3 and Figure 11 As shown, the heating assembly 1000 is further configured with a preheating channel group 210. The preheating channel group 210 can be connected to the input end 1101 of the heating channel group 110. During use, the preheating channel group 210 can preheat the consumables entering the heating channel group 110 and peel off the outer layer to further improve the melting efficiency of the consumables.

[0071] like Figure 2 and Figure 3 As shown, in some embodiments, the preheating channel group 210 can be opened in the heating element 100 and arranged coaxially with the heating channel group 110. Therefore, the assembly gap of the heating component 1000 can be reduced, and the probability of leakage of the molten consumable through the assembly gap can be reduced.

[0072] In some embodiments, the preheating channel group 210 may include a first structural segment 211, a second structural segment 212, and a third structural segment 213 that are sequentially connected. Among them, the end of the third structural segment 213 away from the second structural segment 212 may be connected to the input end 1101 of the heating channel group 110. In the embodiment, the cross-sectional area perpendicular to the axis L in the first structural segment 211 is greater than the cross-sectional area perpendicular to the axis L in the second structural segment 212. The cross-sectional area perpendicular to the axis L in the second structural segment 212 is greater than the cross-sectional area perpendicular to the axis L in the third structural segment 213. Accordingly, the preheating channel group 210 may be presented as a multi-step hole, and the consumables can be peeled off layer by layer to shorten the heat conduction distance between the inner core of the consumable and the heating element 100, thereby improving the melting efficiency of the consumables.

[0073] In other embodiments, the preheating channel group 210 may include two, four, or five structural segments, and the number of structural segments is not limited here. The multiple structural segments may be arranged sequentially and connected along the axial direction of the heating assembly 1000. Among any two adjacent structural segments, the cross-sectional area of ​​the structural segment farther from the heating channel group 110 is greater than the cross-sectional area of ​​the structural segment closer to the heating channel group 110, and each cross-sectional area is perpendicular to the axis L.

[0074] like Figure 2 、 Figure 3 and Figure 11 As shown, in some embodiments, the first structural segment 211 may include a first preheating channel 2111 and at least two second preheating channels 2112. The at least two second preheating channels 2112 may be disposed around the first preheating channel 2111. The cross-sectional area of ​​the second preheating channel 2112 perpendicular to the axis L may be greater than the cross-sectional area of ​​the first preheating channel 2111 perpendicular to the axis L. In an embodiment, both the first preheating channel 2111 and the second preheating channel 2112 may extend through the first structural segment 211 along the axial direction of the heating assembly 1000. Thus, when the consumable passes through the first structural segment 211, the melted portion of the consumable can be peeled off by the portion of the heating element 100 near the junction of the first preheating channel 2111 and the second preheating channel 2112, wherein the melted portion of the consumable near the outside can pass through the second preheating channel 2112. The portion of the consumable material near the inner core can pass through the first preheating channel 2111 and always contact the inner wall of the first preheating channel 2111. This can reduce the impact of the outer portion of the consumable material on the heating of the inner core portion of the consumable material, improve the heating effect of the preheating channel group 210 on the consumable material, and thus improve the overall melting efficiency of the consumable material, while also reducing the feeding resistance of the consumable material.

[0075] In some embodiments, the first structural section 211 may include a first preheating channel 2111 and two second preheating channels 2112. The two second preheating channels 2112 may be symmetrically or asymmetrically arranged around the first preheating channel 2111.

[0076] In other embodiments, the first structural section 211 may further include one first preheating channel 2111 and three, four, or six second preheating channels 2112, and the number of the second preheating channels 2112 is not limited here. The plurality of second preheating channels 2112 may be disposed around the first preheating channel 2111.

[0077] like Figure 3As shown, in some embodiments, the structures of the second structural segment 212 and the third structural segment 213 may be similar to the structure of the first structural segment 211. The first preheating channels 2111 in each structural segment may have a cross-section of the same area, which may be a cross-section perpendicular to the axis L. The second preheating channels 2112 in each structural segment may cooperate to form a stepped hole.

[0078] like Figure 12 As shown, in some embodiments, the second preheating channels 2112 in each structural segment may have a cross section with the same area, which may be a cross section perpendicular to the axis L. The first preheating channels 2111 in each structural segment may cooperate to form a stepped hole.

[0079] like Figure 11 As shown, in some embodiments, the heating assembly 1000 further includes a preheating element 200. A preheating channel group 210 can be provided in the preheating element 200. The preheating element 200 can be connected to the heating element 100 by means of threaded connection or interference fit.

[0080] like Figure 13 As shown, the embodiment further provides a nozzle mechanism, which may include a throat assembly 2000, a nozzle 3000, and a heating assembly 1000 provided in the embodiment. The heating assembly 1000 may be connected between the throat assembly 2000 and the nozzle 3000, wherein the preheating channel group 210 of the heating assembly 1000 may be located at one end of the heating channel group 110 close to the throat assembly 2000.

[0081] In some embodiments, the throat tube assembly 2000 may include a first connecting tube 2100, a second connecting tube 2300, and a throat tube 2200, with the first connecting tube 2100 and the second connecting tube 2300 being disposed at opposite ends of the throat tube 2200. The end of the first connecting tube 2100 away from the second connecting tube 2300 may be connected to the heating assembly 1000 via a threaded connection or an interference fit. Furthermore, the throat tube assembly 2000 may be configured with a flow channel 2001 that passes through the first connecting tube 2100, the throat tube 2200, and the second connecting tube 2300. Consumables may pass through the flow channel 2001 to be delivered to the preheating channel group 210 of the heating assembly 1000.

[0082] In the embodiment, a gap is arranged between the second connecting tube 2300 and the first connecting tube 2100 to achieve a heat insulation effect, thereby preventing the heat in the heating component 1000 from being transferred to the second connecting tube 2300, and reducing the softening of the consumables in the throat assembly 2000 and affecting the normal entry of the consumables into the throat assembly 2000.

[0083] In some embodiments, the nozzle 3000 can be connected to the end of the heating assembly 1000 away from the throat assembly 2000 via a threaded connection or an interference fit. The nozzle 3000 can have a spray hole 3001 formed therein. The spray hole 3001 can extend through the nozzle 3000 and connect the heating channel assembly 110 to the external environment. During use, the molten consumable material heated and melted by the heating assembly 1000 can be extruded outward through the spray hole 3001.

[0084] The embodiment further provides a three-dimensional printer, which may include the heating component 1000 provided in the embodiment.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heating component, characterized in that: The heating element includes a heating channel group extending axially along the heating component, the heating channel group including a first channel and a second channel, the first channel being located inside the second channel, the first channel being located in the center of the heating element, and the cross-sectional area of ​​the first channel being smaller than the cross-sectional area of ​​the consumable; The second channel is arranged around the circumference of the first channel, and / or a connecting channel is provided between the first channel and the second channel.

2. The heating assembly according to claim 1, wherein The heating channel group includes one first channel and at least two second channels, and the at least two second channels are distributed around the first channel. The connecting channel is provided between any second channel and the first channel.

3. The heating assembly according to claim 2, characterized in that The heating channel group includes one first channel and four second channels. The four second channels are distributed around the first channel. The connecting channels are provided between the four second channels and the first channel.

4. The heating assembly according to claim 1, wherein: The heating channel group includes at least one first channel and at least one second channel, and the at least one second channel is arranged around the circumference of the at least one first channel.

5. The heating assembly according to claim 4, characterized in that The heating channel group includes two first channels and two second channels, and the two first channels are distributed around the central axis of the heating element; The two second channels are arranged around the circumference of the two first channels.

6. The heating assembly according to claim 4 or 5, characterized in that: The second channel includes a first heat conducting surface and a second heat conducting surface that are opposite to each other, the first heat conducting surface is located on the inner side of the second heat conducting surface, and the first heat conducting surface is close to the first channel; The first heat-conducting surface is configured with a first convex portion convex toward the second heat-conducting surface or a first concave portion concave toward the direction away from the second heat-conducting surface, and / or the second heat-conducting surface is configured with a second concave portion concave toward the direction away from the first heat-conducting surface or a second convex portion convex toward the first heat-conducting surface.

7. The heating assembly according to claim 1, wherein The heating assembly further includes a preheating channel group, the preheating channel group is connected to the input end of the heating channel group, and the preheating channel group includes at least two groups of structural segments; In any two adjacent groups of the structural segments, the cross-sectional area of ​​the group of the structural segments away from the heating channel group is larger than the cross-sectional area of ​​the group of the structural segments close to the heating channel group, and the cross-sections are perpendicular to the axial direction of the heating component.

8. The heating assembly according to claim 7, characterized in that The heating assembly further includes a preheating element, the preheating element being connected to one end of the heating element close to the input end, and the preheating channel group being opened in the preheating element; Alternatively, the preheating channel group is opened in the heating element.

9. A nozzle mechanism, characterized in that: The invention comprises a throat assembly, a nozzle and a heating assembly according to any one of claims 1 to 8, wherein the heating assembly is connected between the throat assembly and the nozzle.

10. A three-dimensional printer, characterized in that: Comprising the heating assembly according to any one of claims 1 to 8.

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