Heating core, heating assembly, nozzle mechanism and three-dimensional printer

Abstract

The utility model discloses a heating core, a heating assembly, a nozzle mechanism and a three-dimensional printer, and relates to the technical field of three-dimensional printing. The heating core comprises a heating core body, and at least one blade point part is arranged at one end of the heating core body; and at least two melting channels are further formed in the peripheral side of the heating core body. The heating core provided by the utility model can improve the melting rate of consumables.

Description

Technical Field

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

[0002] Three-dimensional (3D) printers create the desired part structure by adding material, heating and melting the material, and then extruding and stacking the molten material according to the path planned by the digital model.

[0003] However, existing 3D printers have problems such as slow melting rate of consumables when heating materials, which affects the normal operation of the 3D printer. Utility Model Content

[0004] The present application provides a heating core, a heating assembly, a nozzle mechanism and a three-dimensional printer to increase the melting rate of consumables.

[0005] In a first aspect, the present application provides a heating core, comprising a heating core body, wherein one end of the heating core body is configured with at least one blade portion;

[0006] At least two melting channels are also provided on the peripheral side of the heating core body.

[0007] In some possible implementations, at least one melting channel is configured on either side of the blade portion;

[0008] At least one guide surface is further configured on either side of the blade portion.

[0009] In some possible implementations, the heating core body is configured with a blade tip portion, and the blade tip portion is extended along the radial direction of the heating core body.

[0010] In some possible implementations, four melting channels are opened on the circumference of the heating core body, and the four melting channels are symmetrically arranged on both sides of the blade portion.

[0011] In some possible implementations, a guide surface is provided on either side of the blade portion;

[0012] The distance between the two guide surfaces provided on both sides of any blade portion gradually increases from one end close to the blade portion to one end far away from the blade portion.

[0013] In a second aspect, the present application further provides a heating assembly, comprising a heating element and the heating core provided in each of the above embodiments;

[0014] The heating assembly is further provided with a heating channel, wherein the heating channel includes a heating section, and the heating section is provided in the heating element;

[0015] The heating core is arranged in the heating section, the peripheral side of the heating core body is in contact with the inner wall of the heating channel, and the blade portion is arranged toward the input end of the heating channel.

[0016] In some possible implementations, the heating core further includes at least one ridge disposed along a radial direction of the heating core body, and the ridge extends along a flow direction of the consumables;

[0017] The inner wall of the heating section is provided with at least one groove arranged along the flow direction of the consumables, and the at least one ridge is inserted into the at least one groove in a one-to-one correspondence.

[0018] In some possible implementations, the heating channel further includes a preheating section, and the preheating section is located on one side of the input end of the heating channel;

[0019] The preheating section includes at least one group of structural sections arranged along the flow direction of the consumables;

[0020] When there are two or more groups of structural segments, the cross-sectional area of ​​each group of structural segments decreases successively along the flow direction of the consumables.

[0021] In some possible implementations, the structural segment includes a first flow channel and at least two second flow channels, the at least two second flow channels are respectively provided around the first flow channel, and the at least two second flow channels are both connected to the first flow channel;

[0022] The cross-sectional area of ​​the second flow channel is greater than the cross-sectional area of ​​the first flow channel.

[0023] In a third aspect, the present application further provides a nozzle mechanism, comprising 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.

[0024] In a fourth aspect, the present application further provides a three-dimensional printer, comprising the heating assembly provided in the above embodiments.

[0025] Beneficial effects of the present application: When the heating core provided by the present application is applied to the nozzle mechanism of a 3D printer, in the process of melting the consumables, the blade portion can cut the consumables into multiple parts, further exposing the inner core portion of the consumables, and at the same time, can also reduce the radial size of the consumables. Multiple consumables can be dispersed into at least two melting channels, and can be heated and melted in at least two melting channels to form a molten state. Among them, the inner core of the consumables can directly contact the heating core body, which can shorten the heat conduction distance between the inner core of the consumables and the heating core body, and at the same time, can also increase the contact area (i.e., heat exchange area) between the consumables and the heating core body. As a result, the heating effect on the consumables can be significantly improved, the melting rate of the consumables can be increased, and at the same time, the consumables can be melted more fully, the fluidity of the molten consumables can be improved, the flow rate of the consumables can be increased, and the output efficiency of the molten consumables can be improved to meet the high-speed printing requirements of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 shows a schematic diagram of the three-dimensional structure of the heating core in some embodiments;

[0028] Figure 2 Schematic diagrams of the top view of the heating core in some embodiments are shown;

[0029] Figure 3 A schematic cross-sectional view of a heating assembly in some embodiments is shown;

[0030] Figure 4 Another cross-sectional schematic diagram of the heating assembly in some embodiments is shown;

[0031] Figure 5 A schematic cross-sectional view of a heating element in some embodiments is shown;

[0032] Figure 6 Another schematic cross-sectional view of the heating element in some embodiments is shown;

[0033] Figure 7 Schematic diagrams of the top view of the heating element in some embodiments are shown;

[0034] Figure 8 shows a partial cross-sectional structural schematic diagram of a heating assembly in some other embodiments;

[0035] Figure 9Shows a schematic structural diagram of the nozzle mechanism in some embodiments;

[0036] Figure 10 Schematic diagrams of the cross-sectional structure of the nozzle mechanism in some embodiments are shown.

[0037] Description of main component symbols:

[0038] 1000-heating component;

[0039] 100 - heating core; 110 - heating core body; 111 - blade; 112 - melting channel; 1121 - opening structure; 113 - flow guide surface; 120 - ridge;

[0040] 200 - heating element; 210 - heating channel; 2101 - input end; 2102 - output end; 211 - heating section; 212 - preheating section; 212a - structural section; 2121 - first structural section; 21211 - first flow channel; 21212 - second flow channel; 2122 - second structural section; 2123 - third structural section; 2124 - step structure; 220 - groove;

[0041] 300-preheating parts;

[0042] 2000-throat assembly; 2001-feeding channel; 2002-gap; 2100-first connecting pipe; 2200-conduit; 2300-second connecting pipe;

[0043] 3000-nozzle; 3100-spray hole;

[0044] M-center axis; L-axis line. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figure 1 and Figure 2 As shown, a heating core 100 is provided in an embodiment, which can be applied to a nozzle mechanism of a three-dimensional printer (ie, a 3D printer).

[0051] like Figure 1 and Figure 2 As shown, the heating core 100 may include a heating core body 110, one end of which is provided with at least one blade portion 111, which can be used to cut the consumables into multiple portions. At least two melting channels 112 are also provided on the circumference of the heating core body 110. The melting channels 112 may extend along the axial direction of the heating core 100, from the end of the heating core body 110 close to the blade portion 111 to the end away from the blade portion 111. The axial direction of the heating core 100 may refer to the extension direction of the central axis M of the heating core 100.

[0052] During use, the heating core 100 can be installed in the nozzle mechanism of the 3D printer. In the process of melting the consumables, the consumables can first be brought into contact with the blade portion 111 of the heating core body 110. The blade portion 111 can cut the consumables into multiple portions, further exposing the inner core of the consumables and reducing the radial size of the consumables. Multiple portions of consumables can be dispersed into at least two melting channels 112 and can be heated and melted in at least two melting channels 112 to form a molten state. Among them, the inner core of the consumables can directly contact the heating core body 110, which can shorten the heat conduction distance between the inner core of the consumables and the heating core body 110. At the same time, the contact area (i.e., the heat exchange area) between the consumables and the heating core body 110 can also be increased.

[0053] Compared with the traditional structure of heating and melting consumables, the heating core 100 provided in the embodiment of the present application can significantly improve the heating effect of the consumables and increase the melting rate of the consumables. At the same time, it can make the consumables melt more fully, improve the fluidity of the molten consumables, and increase the flow rate of the consumables, thereby improving the output efficiency of the molten consumables and meeting the high-speed printing requirements of the 3D printer.

[0054] like Figure 1 and Figure 2 As shown, in some embodiments, the cross-section of one end of the heating core body 110 away from the blade portion 111 perpendicular to the axial direction of the heating core 100 may be substantially circular.

[0055] In other embodiments, the cross-sectional shape of the end of the heating core body 110 away from the blade portion 111 perpendicular to the axial direction of the heating core 100 can also be set to a square, rectangular or elliptical shape.

[0056] In some embodiments, the heating core body 110 may include a blade portion 111. The blade portion 111 may extend radially along the heating core body 110. The radial extension length of the blade portion 111 may be equal to or slightly less than the diameter of the heating core body 110. As consumables pass through, the blade portion 111 may cut the consumables into two portions.

[0057] In other embodiments, the heating core body 110 may include two, three, four, or eight blade portions 111. The multiple blade portions 111 may roughly intersect at the central axis of the heating core body 110, and the cross-sections of the multiple blade portions 111 perpendicular to the axial direction of the heating core 100 may cooperate to form a V-shape, a cross-shape, a Y-shape, or a rice shape. The central axis of the heating core body 110 may coincide with the central axis M of the heating core 100. When the consumables pass through, the multiple blade portions 111 may cooperate to cut the consumables into three, four, or eight portions.

[0058] In the embodiment, at least one melting channel 112 is disposed on either side of the blade portion 111 .

[0059] In some embodiments, four melting channels 112 are provided on the circumferential side of the heating core body 110, and the four melting channels 112 can be symmetrically arranged on both sides of the blade portion 111. The consumables cut by the blade portion 111 can be further dispersed into the four melting channels 112 under the action of extrusion. When the consumables pass through the melting channels 112, the inner core of the consumables can exchange heat with the heating core body 110, so that the consumables are heated and melted. Among them, the inner core of the consumables can directly contact the inner wall of the melting channel 112, which can realize direct contact between the inner core of the consumables and the heating core body 110, shorten the heat conduction distance between the inner core of the consumables and the heating core 100, and at the same time, increase the contact area between the consumables and the heating core body 110, improve the melting rate of the consumables, and make the consumables melt more fully.

[0060] In other embodiments, two, three, or six melting channels 112 may be provided around the periphery of the heating core body 110. The plurality of melting channels 112 may be provided on the sides of the blade portion 111, with at least one melting channel 112 provided on each side of each blade portion 111 to ensure that the cut consumables can all enter the melting channel 112 on the corresponding side.

[0061] In some embodiments, the cross-sectional area of ​​the melting channel 112 can be set as small as possible, wherein the cross-sectional area may refer to the cross-sectional area of ​​the melting channel 112 perpendicular to the axial direction of the heating core 100. On the one hand, the heat conduction distance between the heating core body 110 and the inner core of the consumable can be shortened. On the other hand, it is beneficial to open a larger number of melting channels 112 on the circumferential side of the heating core body 110, further increasing the contact area between the heating core body 110 and the consumable. In this way, the melting efficiency of the consumable can be further improved, which can ensure that the consumable is melted more fully, improve the fluidity of the consumable, and further improve the output efficiency of the molten consumable to meet the high-speed printing requirements of the 3D printer.

[0062] In some embodiments, the melting channel 112 may be formed along the radial direction of the heating core body 110 by being recessed from the side of the heating core body 110 toward the central axis of the heating core body 110. Accordingly, the side of the melting channel 112 facing the circumference of the heating core body 110 may be configured as an opening structure 1121.

[0063] In addition, the melting channel 112 may be configured with a width direction, and the width direction may be perpendicular to the radial direction of the melting channel 112. In some embodiments, the dimension n of the melting channel 112 in the width direction may be set to 0.5 mm ≤ n ≤ 2.0 mm. On the one hand, it can ensure the smooth passage of the consumables, and on the other hand, it can shorten the heat conduction distance between the heating core body 110 and the inner core of the consumables, thereby increasing the contact area between the heating core body 110 and the consumables. Exemplarily, in some embodiments, the dimension of the melting channel 112 in the width direction may be set to 0.5 mm, 0.85 mm, 1.2 mm, 1.45 mm, 1.6 mm, 1.9 mm, 2.0 mm or any other size between 0.5 mm and 2.0 mm.

[0064] In other embodiments, the melting channel 112 may also be a channel with closed circumference, that is, a cross section of the melting channel 112 perpendicular to the axial direction of the heating core 100 may have a closed edge.

[0065] like Figure 1 As shown, in the embodiment, at least one guide surface 113 is disposed on both sides of the blade portion 111 , which can guide the cut consumables to the melting channel 112 on the corresponding side.

[0066] In some embodiments, a guide surface 113 is disposed on each side of the blade 111. The guide surfaces 113 may be inclined surfaces. Specifically, the distance between the two guide surfaces 113 may gradually increase from the end closer to the blade 111 to the end farther from the blade 111. In other words, the guide surfaces 113 may gradually tilt away from the central axis M from the end closer to the blade 111 to the end farther from the blade 111.

[0067] In other embodiments, two, three, or five guide surfaces 113 may be configured on any side of the blade portion 111. Each guide surface 113 may be connected between the blade portion 111 and the corresponding melting channel 112, and may guide the cut consumables into the corresponding melting channel 112.

[0068] like Figure 1 、 Figure 3 and Figure 4 As shown, a heating assembly 1000 is further provided in the embodiment, comprising a heating element 200 and a heating core 100 provided in the embodiment.

[0069] In the embodiment, the heating assembly 1000 is further configured with a heating channel 210. The heating channel 210 may include a heating section 211 provided in the heating element 200. In addition, the heating channel 210 may include an input end 2101 and an output end 2102.

[0070] In some embodiments, the heater core 100 can be assembled within the heating section 211, that is, the heater core 100 can be located within the heating element 200. Furthermore, one end of the heater core body 110, provided with the blade portion 111, can be positioned toward the input end 2101 of the heating channel 210. In some embodiments, the heater core 100 can be coaxially disposed with the heating element 200, with the central axis M of the heater core 100 coinciding with the axis L of the heating assembly 1000. The axial direction of the heating assembly 1000 can refer to the direction in which the axis L extends.

[0071] In an embodiment, the peripheral surface of the heating core body 110 can be in contact with the inner wall of the heating channel 210, thereby facilitating the transfer of heat from the heating element 200 to the heating core 100, thereby heating and melting the consumables passing through the heating core 100. In some embodiments, the heating core body 110 and the heating element 200 can be fixedly connected by an interference fit or a tight fit, and the peripheral surface of the heating core body 110 can be in contact with the inner wall of the heating element 200 facing the heating channel 210.

[0072] like Figure 1 and Figure 4 As shown, in an embodiment, the heating core 100 further includes at least one ridge 120 extending along the flow direction of the consumables. The flow direction of the consumables may be parallel to the axial direction of the heating assembly 1000, and the flow direction of the consumables may refer to the direction from the input end 2101 to the output end 2102. The ridge 120 may be arranged on the circumferential side of the heating core body 110 along the radial direction of the heating core body 110. The inner wall of the heating section 211 may be provided with at least one groove 220 adapted to the ridge 120, that is, the groove 220 may be provided on the inner wall of the heating element 200 facing the heating channel 210. The groove 220 may extend along the flow direction of the consumables. In an embodiment, at least one ridge 120 may be inserted into at least one groove 220 in a one-to-one correspondence and fit against the inner wall of the groove 220. On the one hand, the positioning and installation of the heating core 100 and the heating element 200 can be achieved, thereby improving the stability of the installation of the heating core 100 and the heating element 200. On the other hand, the contact area (ie, heat exchange area) between the heating core 100 and the heating element 200 can be increased, thereby improving the heat exchange efficiency between the heating core 100 and the heating element 200 and further improving the melting efficiency and melting effect of the consumables.

[0073] In some embodiments, the heating core 100 may include two ridges 120 symmetrically disposed around the heating core body 110. Correspondingly, the inner wall of the heating section 211 may have two opposing grooves 220. The two ridges 120 are inserted into the two grooves 220 in a one-to-one correspondence.

[0074] In other embodiments, the heating core 100 may further include one, three, or four ridges 120. When the heating core 100 includes multiple ridges 120, the ridges 120 may be evenly or unevenly distributed around the circumference of the heating core body 110. Correspondingly, the side of the heating element 200 facing the heating channel 210 may be provided with grooves 220 equal in number to the ridges 120. The grooves 220 may be located on the inner wall of the heating section 211, and the grooves 220 may be arranged in a one-to-one correspondence with the ridges 120.

[0075] In some embodiments, the cross section of the ridge 120 may be semicircular, semi-elliptical, or square, where the cross section refers to a section of the ridge 120 perpendicular to the central axis M of the heating core 100 . The shape of the groove 220 may be adapted to the shape of the ridge 120 .

[0076] like Figure 3 、 Figures 5 to 7 As shown, in some embodiments, the heating channel 210 further includes a preheating section 212. The preheating section 212 can be disposed on the side of the input end 2101 of the heating channel 210, that is, the preheating section 212 can be located at the end of the heating section 211 near the blade portion 111, and the preheating section 212 can be connected to the heating section 211. In embodiments, the end of the preheating section 212 away from the heating section 211 can serve as the input end 2101 of the heating channel 210. The end of the heating section 211 away from the preheating section 212 can serve as the output end 2102 of the heating channel 210.

[0077] In some embodiments, the preheating section 212 may be provided in the heating element 200, that is, the heating channel 210 may be formed in the heating element 200. The heating channel 210 may penetrate the heating element 200 along the axial direction of the heating element 200. Thus, the assembly gap in the heating assembly 1000 may be reduced, thereby reducing the possibility of leakage of the molten consumable from the assembly gap.

[0078] In an embodiment, the preheating section 212 may include at least one group of structural sections 212a sequentially arranged along the flow direction of the consumables.

[0079] In some embodiments, the preheating section 212 may include at least two groups of structural segments 212a, and the at least two groups of structural segments 212a may be arranged in sequence along the flow direction of the consumables. The cross-sectional area of ​​each group of structural segments 212a may decrease in sequence along the flow direction of the consumables, wherein the cross-sectional area may refer to the cross-sectional area of ​​each structural segment 212a perpendicular to the axial direction of the heating component 1000. Thus, the preheating section 212 may present a stepped hole, and a corresponding step structure 2124 may be formed between two adjacent structural segments 212a. When the consumables pass through the preheating section 212, the step structure 2124 between the two adjacent groups of structural segments 212a may peel off the melted portion of the consumables, so that the portion of the consumables close to its inner core is exposed and is always in contact with the inner wall of the preheating section 212 for heating. Thus, the overall melting efficiency of the consumables can be improved, the output efficiency of the molten consumables can be improved, and at the same time, the feeding resistance of the consumables can be reduced.

[0080] In some embodiments, the preheating section 212 may include three groups of structural segments 212a, namely a first structural segment 2121, a second structural segment 2122, and a third structural segment 2123. The first structural segment 2121, the second structural segment 2122, and the third structural segment 2123 may be arranged sequentially along the flow direction of the consumables, wherein the third structural segment 2123 is arranged close to the heating section 211.

[0081] In this embodiment, the cross-sectional area of ​​the first structural segment 2121 is greater than the cross-sectional area of ​​the second structural segment 2122. The cross-sectional area of ​​the second structural segment 2122 is greater than the cross-sectional area of ​​the third structural segment 2123. When the consumable passes through the preheating section 212, the outer surface of the consumable is peeled off layer by layer, allowing the inner core of the consumable to directly contact the heating element 200, shortening the heat conduction distance between the inner core of the consumable and the heating element 200, thereby accelerating the melting efficiency of the entire consumable.

[0082] In other embodiments, the preheating section 212 may further include one, two, four, five, or seven groups of structural segments 212a.

[0083] In addition, in some embodiments, the first structural section 2121 further includes a first flow channel 21211 and at least two second flow channels 21212. The at least two second flow channels 21212 are arranged on the circumferential side of the first flow channel 21211. The second flow channels 21212 can be connected to the side of the first flow channel 21211. In an embodiment, the cross-sectional area of ​​the second flow channel 21212 can be greater than the cross-sectional area of ​​the first flow channel 21211, wherein the cross-sectional area can refer to the cross-sectional area of ​​each flow channel perpendicular to the axial direction of the heating component 1000. Thus, when the consumable passes through the first structural section 2121, the portion of the consumable that has been melted by heat can be peeled off by the partial structure of the heating element 200 near the connection between the first flow channel 21211 and the second flow channel 21212, wherein the portion of the consumable that has been melted near the outside can pass through the second flow channel 21212. The portion of the consumable material near the inner core can pass through the first flow channel 21211 and always contact the inner wall of the first flow channel 21211. 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 section 212 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.

[0084] In some embodiments, the first structural segment 2121 may include two second flow channels 21212 , and the two second flow channels 21212 are symmetrically arranged around the first flow channel 21211 .

[0085] In other embodiments, the first structural section 2121 may further include three, four, or six second flow channels 21212. The plurality of second flow channels 21212 may be evenly or unevenly distributed around the first flow channel 21211, and each second flow channel 21212 is connected to a side surface of the first flow channel 21211.

[0086] In the embodiment, the structures of the second structural segment 2122 and the third structural segment 2123 may be similar to the structure of the first structural segment 2121 , and the first structural segment 2121 , the second structural segment 2122 and the third structural segment 2123 are coaxially arranged.

[0087] In some embodiments, the cross-sectional area of ​​the first flow channel 21211 in the first structural segment 2121 may be greater than the cross-sectional area of ​​the first flow channel 21211 in the second structural segment 2122. The cross-sectional area of ​​the first flow channel 21211 in the second structural segment 2122 may be greater than the cross-sectional area of ​​the first flow channel 21211 in the third structural segment 2123. The second flow channels 21212 in each structural segment 212a may have the same cross-sectional area. The cross-sectional area of ​​the first flow channel 21211 in each structural segment 212a may refer to the cross-sectional area of ​​the first flow channel 21211 perpendicular to the axial direction of the heating assembly 1000. The cross-sectional area of ​​the second flow channel 21212 in each structural segment 212a may refer to the cross-sectional area of ​​the second flow channel 21212 perpendicular to the axial direction of the heating assembly 1000.

[0088] In other embodiments, the cross-sectional area of ​​the second flow channel 21212 in the first structural segment 2121 may be greater than the cross-sectional area of ​​the second flow channel 21212 in the second structural segment 2122. The cross-sectional area of ​​the second flow channel 21212 in the second structural segment 2122 may be greater than the cross-sectional area of ​​the second flow channel 21212 in the third structural segment 2123. The first flow channels 21211 in each structural segment 212a may have the same cross-sectional area.

[0089] In other embodiments, the cross-sectional area of ​​the first flow channel 21211 in the first structural segment 2121 may be greater than the cross-sectional area of ​​the first flow channel 21211 in the second structural segment 2122. The cross-sectional area of ​​the first flow channel 21211 in the second structural segment 2122 may be greater than the cross-sectional area of ​​the first flow channel 21211 in the third structural segment 2123. Furthermore, the cross-sectional area of ​​the second flow channel 21212 in the first structural segment 2121 may be greater than the cross-sectional area of ​​the second flow channel 21212 in the second structural segment 2122. The cross-sectional area of ​​the second flow channel 21212 in the second structural segment 2122 may be greater than the cross-sectional area of ​​the second flow channel 21212 in the third structural segment 2123.

[0090] like Figure 8 As shown, in other embodiments, the heating assembly 1000 further includes a preheating element 300, the preheating section 212 can be provided in the preheating element 300, and the heating section 211 can be provided in the heating element 200. The preheating element 300 can be connected to an end of the heating element 200 near the input end 2101 by means of interference fit or threaded connection.

[0091] During use, the solid consumable can enter from the input end 2101 of the heating channel 210. When the consumable passes through the preheating section 212, the portion of the consumable close to the surface can be peeled off layer by layer, and the portion of the consumable close to the surface can pass through the second flow channel 21212 in each structural segment 212a. Among them, the portion of the consumable close to the inner core can be gradually exposed. The portion of the consumable close to the inner core can pass through the first flow channel 21211 in each structural segment 212a and contact the inner wall of the first flow channel 21211 for heat conduction. Thereby, the heat conduction distance between the inner core of the consumable and the heating element 200 can be shortened, and the melting effect of the inner core of the consumable can be improved. In addition, the melted consumable can flow from the second flow channel 21212 in each structural segment 212a toward the direction close to the heating section 211.

[0092] When the consumable material reaches the heating section 211, the consumable material can be cut into multiple parts under the action of the blade portion 111, and enter the melting channel 112 on each side of the blade portion 111 under the action of the guide surface 113. Among them, the molten consumable material can flow in the direction close to the output end 2102 through the melting channel 112. The solid consumable material can contact the inner wall of the melting channel 112 to be heated and melted. Among them, the inner core of the consumable material can be cut into multiple parts and dispersed into multiple melting channels 112. On the one hand, the heat conduction distance between the inner core of the consumable material and the heating element 200 can be shortened, and on the other hand, the contact area between the inner core of the consumable material and the heating element 200 can be increased. As a result, the heating efficiency of the inner core of the consumable material can be improved, and the consumable material can be melted more fully, thereby improving the overall melting efficiency of the consumable material and the output rate of the molten consumable material to meet the high-speed printing requirements of the 3D printer.

[0093] like Figure 9 and Figure 10 As shown, the embodiment further provides a nozzle mechanism, including a throat assembly 2000, a nozzle 3000, and a heating assembly 1000 provided in the embodiment. The heating assembly 1000 can be connected between the throat assembly 2000 and the nozzle 3000, wherein the input end 2101 of the heating channel 210 can be arranged near one end of the throat assembly 2000.

[0094] In some embodiments, the throat assembly 2000 may include a first connecting tube 2100, a second connecting tube 2300, and a conduit 2200, with the first connecting tube 2100 and the second connecting tube 2300 being disposed at opposite ends of the conduit 2200. The end of the first connecting tube 2100 remote from the second connecting tube 2300 may be connected to the heating assembly 1000 via a threaded connection or interference fit. Furthermore, the throat assembly 2000 may be configured with a material delivery channel 2001 that passes through the first connecting tube 2100, the conduit 2200, and the second connecting tube 2300. Consumables may pass through the material delivery channel 2001 to be delivered to the heating channel 210 of the heating assembly 1000.

[0095] In the embodiment, a gap 2002 is configured between the second connecting tube 2300 and the first connecting tube 2100, which can achieve a heat insulation effect, hinder the heat in the heating component 1000 from being transferred to the second connecting tube 2300, and reduce the probability of the consumables melting in the throat component 2000 and affecting the normal extrusion of the consumables.

[0096] 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 interference fit. The nozzle 3000 can have a spray hole 3100 disposed therein. The spray hole 3100 can extend through the nozzle 3000 and connect the heating channel 210 to the external environment. During use, the molten consumable material melted by the heating assembly 1000 can be collected at the end of the heating channel 210 near the output end 2102 and extruded outward through the spray hole 3100.

[0097] The embodiment further provides a three-dimensional printer, which may include the heating component 1000 provided in the embodiment.

[0098] 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.

[0099] 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 core, characterized in that: It comprises a heating core body (110), one end of which is provided with at least one blade portion (111); At least two melting channels (112) are also provided on the peripheral side of the heating core body (110).

2. The heating core according to claim 1, characterized in that At least one melting channel (112) is disposed on either side of the blade portion (111); At least one flow guide surface (113) is also configured on either side of the blade portion (111).

3. The heating core according to claim 1 or 2, characterized in that: The heating core body (110) is provided with a blade tip portion (111), and the blade tip portion (111) is extended along the radial direction of the heating core body (110).

4. The heating core according to claim 3, characterized in that Four melting channels (112) are provided on the circumference of the heating core body (110), and the four melting channels (112) are symmetrically arranged on both sides of the blade portion (111).

5. The heating core according to claim 2, characterized in that A guide surface (113) is provided on either side of the blade portion (111); The distance between the two guide surfaces (113) provided on both sides of any blade portion (111) gradually increases from an end close to the blade portion (111) to an end far from the blade portion (111).

6. A heating component, characterized in that: comprising a heating element (200) and a heating core according to any one of claims 1 to 5; The heating assembly is further provided with a heating channel (210), the heating channel (210) comprising a heating section (211), and the heating section (211) is opened in the heating element (200); The heating core is arranged in the heating section (211), the peripheral side of the heating core body (110) is in contact with the inner wall of the heating channel (210), and the blade portion (111) is arranged toward the input end (2101) of the heating channel (210).

7. The heating assembly according to claim 6, characterized in that The heating core further comprises at least one ridge (120) arranged along the radial direction of the heating core body (110), the ridge (120) extending along the flow direction of the consumables; The inner wall of the heating section (211) is provided with at least one groove (220) arranged along the flow direction of the consumables, and the at least one ridge (120) is inserted into the at least one groove (220) in a one-to-one correspondence.

8. The heating assembly according to any one of claims 6 to 7, characterized in that: The heating channel (210) further comprises a preheating section (212), and the preheating section (212) is located on one side of the input end (2101) of the heating channel (210); The preheating section (212) comprises at least one group of structural sections (212a) arranged along the flow direction of the consumables; When the structural segments (212a) are in two or more groups, the cross-sectional area of ​​each group of the structural segments (212a) decreases sequentially along the flow direction of the consumables.

9. The heating assembly according to claim 8, characterized in that The structural section (212a) comprises a first flow channel (21211) and at least two second flow channels (21212), wherein the at least two second flow channels (21212) are respectively arranged on the circumference of the first flow channel (21211), and the at least two second flow channels (21212) are both in communication with the first flow channel (21211); The cross-sectional area of ​​the second flow channel (21212) is greater than the cross-sectional area of ​​the first flow channel (21211).

10. A nozzle mechanism, characterized in that: It comprises a throat assembly (2000), a nozzle (3000), and a heating assembly according to any one of claims 6 to 9, wherein the heating assembly is connected between the throat assembly (2000) and the nozzle (3000).

11. A three-dimensional printer, characterized in that: Comprising a heating assembly as claimed in any one of claims 6 to 9.

Images