Melting assembly, melting nozzle and 3D printer

Abstract

The utility model relates to a melting assembly, a melting nozzle and a 3D printer. The melting assembly comprises: a heat conducting member; the supporting ribs are arranged on the heat conduction piece, and a melting channel is formed between every two adjacent supporting ribs; and the plurality of melting channels are formed on the heat conduction piece by the plurality of supporting ribs. The multiple melting channels are formed in the heat conduction piece through the supporting ribs, the preheated consumables can enter the melting channels correspondingly, and therefore the consumables can make direct contact with the inner walls of the melting channels, and the heating area of the consumables is increased. Therefore, the consumables can be quickly melted, the melting efficiency is improved, the melting requirement for the consumables during high-speed printing is met, the printing speed is increased, and the printing quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing equipment, and in particular to a melting component, a melting nozzle and a 3D printer. Background Art

[0002] FDM (Fused Deposition Modeling) 3D printers use solid filament as the printing material. The printer's nozzle is used to melt and extrude the molten filament. Specifically, the filament enters the nozzle under external force, where it heats and melts inside the nozzle and is extruded from the nozzle outlet, gradually building up layer by layer to create a 3D model.

[0003] To increase the melting speed of the filament, a current solution involves adding an insert to the nozzle. Typically, heat from the main body is transferred to the insert to melt the filament. However, when feeding very quickly, insufficient heat may be transferred to the insert, affecting the filament's melting. Furthermore, the filament's hardness can cause a hard contact between the insert and the material, hindering the filament's feed and preventing it from quickly entering the nozzle for melting. In other words, adding an insert to the nozzle cannot meet the filament melting requirements of high-speed printing. Utility Model Content

[0004] Based on this, it is necessary to provide a melting component, a melting nozzle and a 3D printer to address the problem that adding inserts to the current nozzle cannot meet the melting requirements of consumables for high-speed printing. The melting components can increase the heating area of ​​the consumables, enable the consumables to melt quickly, improve the melting efficiency, meet the melting requirements of the consumables during high-speed printing, and ensure the printing speed.

[0005] A melting assembly comprising:

[0006] thermally conductive components; and

[0007] Support ribs are provided on the heat conducting member, and a melting channel is formed between two adjacent support ribs; a plurality of support ribs form a plurality of melting channels on the heat conducting member.

[0008] In one embodiment of the present application, a plurality of the melting channels are arranged at intervals along the circumference of the heat conducting member.

[0009] In one embodiment of the present application, the plurality of melting channels include a plurality of first channels and a plurality of second channels, and the plurality of first channels are disposed around the circumference of the plurality of second channels.

[0010] In one embodiment of the present application, the melting assembly further comprises a tapered groove, and the tapered groove is provided on a side of the melting assembly toward which the consumables flow;

[0011] The diameter of the tapered groove gradually decreases along the flow direction of the consumables, and each of the melting channels is connected to the tapered groove.

[0012] In one embodiment of the present application, the tapered groove includes an inclined inner wall and a groove bottom wall, and the inclined inner wall is connected to the groove bottom wall.

[0013] In one embodiment of the present application, a plurality of first channels in each of the melting channels are arranged on the inclined inner wall of the tapered groove, and a plurality of second channels in each of the melting channels are arranged on the groove bottom wall of the tapered groove.

[0014] A melting nozzle, comprising a nozzle, a preheating portion, and a melting assembly according to any of the above technical features;

[0015] One end of the melting assembly at least accommodates a portion of the preheating portion, and the nozzle is connected to the other end of the melting assembly;

[0016] The preheating part comprises a heat conduction channel and a separator. The heat conduction channel penetrates the preheating part in the axial direction. The separator is arranged on the inner wall of the heat conduction channel.

[0017] In one embodiment of the present application, the heat conduction channel includes a main channel and two branch channels, and the two branch channels are arranged on both sides of the main channel and connected to the main channel.

[0018] In one embodiment of the present application, the separation member includes a plurality of separation steps, and the plurality of separation steps are provided on at least a portion of the inner wall of the main channel;

[0019] The widths of the multiple separation steps increase step by step along the flow direction of the consumables, so that the main channel is gradually contracted.

[0020] A 3D printer comprises a throat structure and a melting nozzle according to any of the above technical features, wherein the throat structure is arranged at one end of the melting nozzle.

[0021] After adopting the above technical solution, this application has at least the following technical effects:

[0022] The melting assembly, melting nozzle, and 3D printer of the present application have multiple support ribs disposed on a heat conducting member, forming multiple melting channels on the heat conducting member. After the preheated consumables flow into the heat conducting member, the consumables can flow into the various melting channels of the melting assembly, where they are melted into a molten wire melt and extruded by the melting nozzle.

[0023] This melting assembly uses supporting ribs to form multiple melting channels within the heat conductor. These channels allow preheated filament to flow directly into each channel, allowing the filament to directly contact the inner walls of the channels, increasing the heated surface area. This allows the filament to melt quickly, improving melting efficiency and meeting the melting requirements of high-speed printing, thereby increasing printing speed and ensuring print quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a melting nozzle according to an embodiment of the present application.

[0025] Figure 2 for Figure 1 A front view of the melting nozzle is shown.

[0026] Figure 3 for Figure 2 A cross-sectional view of the melting nozzle is shown at AA.

[0027] Figure 4 for Figure 3 Schematic diagram of conveying consumables in the melting nozzle shown.

[0028] Figure 5 for Figure 2 The cross-sectional view of the melting nozzle is shown at BB.

[0029] Figure 6 for Figure 3 A perspective view of a first embodiment of a melting assembly is shown.

[0030] Figure 7 for Figure 6 A side view of the melting assembly is shown.

[0031] Figure 8 for Figure 7 A cross-sectional view of the melting assembly is shown at CC.

[0032] Figure 9 for Figure 3 A side view of a second embodiment of a melting assembly is shown.

[0033] Figure 10 for Figure 9 A cross-sectional view of the melting assembly is shown at DD.

[0034] Figure 11 for Figure 3 A side view of a third embodiment of a melting assembly is shown.

[0035] Figure 12 for Figure 11 A cross-sectional view of the melting assembly is shown at EE.

[0036] Figure 13 for Figure 3 A side view of a fourth embodiment of a melting assembly is shown.

[0037] Figure 14 for Figure 13 A cross-sectional view of the melting assembly is shown at FF.

[0038] Figure 15 for Figure 3 A perspective view of the preheating section in the melting nozzle is shown.

[0039] Figure 16 for Figure 15 A side view of the preheating section is shown.

[0040] Figure 17 for Figure 16 The cross-sectional view of the preheating section at GG is shown.

[0041] Figure 18 for Figure 16 The cross-sectional view of the preheating section is shown at HH.

[0042] Among them: 100, melting nozzle; 110, preheating part; 111, heat conduction channel; 1111, main channel; 1112, branch channel; 112, separation part; 1121, separation step; 113, third mounting groove; 120, melting assembly; 121, melting channel; 1211, first channel; 1212, second channel; 122, first mounting groove; 123, second mounting groove; 124, heat conduction part; 125, supporting rib; 126, tapered groove; 1261, inclined inner wall; 1262, groove bottom wall; 127, accommodating groove; 130, nozzle; 131, output channel; 200, consumables; 300, throat structure; 310, connecting part; 320, throat; 330, heat dissipation part. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above," "above," and "above" the second feature 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. The first feature being "below," "below," and "below" the second feature 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.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] Understandably, to increase the melting speed of the filament, the current solution involves adding an insert to the nozzle. Typically, heat from the main body is transferred to the insert to melt the filament. However, when the feed rate is very high, insufficient heat may be transferred to the insert, affecting the filament's melting. Furthermore, the filament is relatively hard when in contact with the insert, causing a hard contact between the two. This hinders the filament's feed and prevents it from quickly entering the nozzle for melting. In other words, adding an insert to the nozzle cannot meet the filament melting requirements during high-speed printing.

[0050] See also Figures 1 to 5 To this end, the present application provides a melting component 120 , which is applied to the melting nozzle 100 . Figure 1 This is a three-dimensional diagram of a melting nozzle 100 according to an embodiment of the present application. Figure 2 for Figure 1 The front view of the melting nozzle 100 is shown, Figure 3 for Figure 2 The cross-sectional view of the melting nozzle 100 is shown at AA. Figure 4 for Figure 3 The schematic diagram of the conveying consumable 200 in the melting nozzle 100 is shown. Figure 5 for Figure 2 The figure shows a cross-sectional view of the melt nozzle 100 at point BB. The melt nozzle 100 is primarily used in 3D printers. After the consumable 200 is delivered to the melt nozzle 100, the melt nozzle 100 transfers heat to the consumable 200, causing the consumable 200 to melt into a molten wire. The molten wire is then extruded to achieve 3D printing. Of course, in other embodiments of the present application, the melt nozzle 100 can also be used in equipment such as thermal spraying that requires the use of the melt nozzle 100.

[0051] This application only uses the example of a 3D printer using a melt nozzle 100 having a melting assembly 120. The melting assembly 120 can transfer heat to the preheated consumable 200 separately, increasing the heated area of ​​the consumable 200, thereby enabling the consumable 200 to melt quickly and improve melting efficiency, thereby meeting the melting requirements of the consumable 200 during high-speed printing, increasing printing speed, and ensuring print quality.

[0052] To better illustrate the structure of the melting assembly 120, the structure of the melting nozzle 100 is briefly introduced here. The melting nozzle 100 includes a preheating portion 110 and a melting assembly 120. One end of the melting assembly 120 at least partially accommodates the preheating portion 110. Figures 1 to 5 As shown, the bottom of the preheating portion 110 is disposed on the top of the melting assembly 120 .

[0053] It is worth noting that the top, bottom, up and down directions described in this application are Figures 1 to 5 The direction shown is the reference and will not be described in detail later. Moreover, the axial direction in this application refers to the axial direction and height direction of the melting component 120. Figures 1 to 5 As shown, the direction of the line connecting the top and bottom of the melting assembly 120 is the axial direction of the melting assembly 120. The circumferential direction of the melting assembly 120 is the circumferential direction of the melting assembly 120. The axial and circumferential directions are also used for other components and will not be repeated hereafter.

[0054] The preheating unit 110 and the melting assembly 120 can achieve heat conduction, and the preheating unit 110 is arranged on the top of the melting assembly 120. The flow direction of the consumables 200 is as follows: Figure 4 As shown, after the consumables 200 enter the preheating part 110 along the direction of the arrow for preheating and melting, the consumables 200 flows into the melting assembly 120 along the direction indicated by the arrow for full melting.

[0055] The consumable material 200 enters the preheating section 110 from the top and gradually moves downward. During this movement, the preheating section 110 and the melting assembly 120 transfer heat to the consumable material 200, causing it to melt. When the consumable material 200 reaches the bottom of the melting assembly 120, it melts into a molten wire melt, which is then extruded by the melting nozzle 100 to achieve 3D printing.

[0056] The melting nozzle 100 can transfer heat and separate the outer ring and inner core of the consumable 200 during the transportation of the consumable 200, so that the outer ring and the inner core of the consumable 200 can be transported and heated separately, reducing the transportation resistance of the consumable 200, increasing the heating area of ​​the consumable 200, and reducing the heat transfer distance between the inner core of the consumable 200 and the heat source, so as to better transfer heat to the inner core, thereby enabling the consumable 200 to melt quickly, improving the melting efficiency, meeting the melting requirements of the consumable 200 during high-speed printing, improving the printing speed, and ensuring the printing quality.

[0057] The specific structure of the melting assembly 120 according to one embodiment is described below.

[0058] See also Figures 3 to 8In one embodiment, the melting assembly 120 includes a heat conductive member 124 and a plurality of support ribs 125 . The plurality of support ribs 125 are disposed in the heat conductive member 124 , and a melting channel 121 is formed between two adjacent support ribs 125 . The plurality of support ribs 125 form a plurality of melting channels 121 on the heat conductive member 124 . Figure 6 for Figure 3 A perspective view of a first embodiment of the melting assembly 120 is shown, Figure 7 for Figure 6 A side view of the melting assembly 120 is shown, Figure 8 for Figure 7 A cross-sectional view of the melting assembly 120 is shown at CC.

[0059] A plurality of support ribs 125 are disposed within the heat conducting member 124, and a plurality of melting channels 121 are formed on the heat conducting member 124. Each melting channel 121 extends axially through the heat conducting member 124 and is independent of the others. Consumables 200 are accommodated within the melting channels 121, thereby increasing the contact area between the consumables 200 and the melting assembly 120.

[0060] Multiple support ribs 125 extend axially in the heat conductor 124. The heat conductor 124 can transfer heat to the multiple support ribs 125. The heat conductor 124 and the multiple support ribs 125 can transfer heat to each melting channel 121, so that the consumables 200 are fully heated and melted.

[0061] Typically, after the consumable material 200 passes through the preheating unit 110, the preheating unit 110 can form a wire melt from the outer ring of the consumable material 200. That is, the preheating unit 110 can output the wire melt and the unmelted portion of the inner core. The wire melt and the unmelted portion of the inner core then flow into the various melting channels 121 of the melting assembly 120.

[0062] The molten wire and the unmelted portion of the inner core in each melting channel 121 contact the inner wall of the melting channel 121. The heat conductor 124 can conduct heat to each support rib 125. Then, the heat conductor 124 and the support rib 125 can transfer heat to the molten wire and the unmelted portion of the inner core in the melting channel 121, so that the consumable 200 can be fully melted after being heated, forming a molten wire melt.

[0063] The melting component 120 diverts the wire melt and the unmelted portion of the inner core output by the preheating part 110 through multiple small-section melting channels 121, so that the wire melt and the unmelted portion of the inner core can be heated separately, greatly increasing the heating area, so that the wire melt and the unmelted portion of the inner core in the melting component 120 can be melted quickly; in this way, the consumables 200 can be fully melted to meet the extrusion rate requirements of the melting nozzle 100, thereby improving printing efficiency.

[0064] The melting assembly 120 of the above embodiment uses support ribs 125 to form multiple melting channels 121 within the heat conducting member 124. These allow the preheated consumable 200 to flow into each melting channel 121. This allows the consumable 200 to directly contact the inner walls of the melting channels 121, increasing the heated surface area of ​​the consumable 200. This allows the consumable 200 to melt quickly, improving melting efficiency and meeting the melting requirements of the consumable 200 during high-speed printing, thereby increasing printing speed and ensuring print quality.

[0065] Optionally, the plurality of support ribs 125 are arranged in a crisscross pattern, a grid pattern, etc. in the inner cavity of the heat conducting member 124. Of course, in other embodiments of the present application, the plurality of support ribs 125 may also be arranged in an inner and outer ring staggered or in other structural forms capable of forming the melting channel 121.

[0066] In one embodiment, the heat conducting member 124 and the plurality of support ribs 125 are integrally formed. That is, the melting assembly 120 can be formed in an integrally formed manner. Of course, in other embodiments of the present application, the plurality of support ribs 125 are interference-fitted or clipped onto the heat conducting member 124. In other words, the support ribs 125 are inserts, disposed within the inner cavity of the heat conducting member 124 to form the plurality of melting channels 121.

[0067] See also Figures 3 to 8 In one embodiment, a first mounting groove 122 is formed at one end of the melting assembly 120, and the preheating portion 110 is partially disposed in the first mounting groove 122. In other words, the top of the melting assembly 120 has the first mounting groove 122, and the bottom of the preheating portion 110 is disposed in the first mounting groove 122. In this way, the melting assembly 120 can transfer heat to the preheating portion 110 in the first mounting groove 122, thereby keeping the preheating portion 110 heated.

[0068] See also Figures 3 to 8 In one embodiment, the melting assembly 120 has a second mounting groove 123 at one end away from the preheating unit 110. The melting nozzle 100 further includes a nozzle 130, which is disposed in the second mounting groove 123. The nozzle 130 has an output channel 131, which communicates with the melting channel 121. The second mounting groove 123 is disposed at the bottom of the melting assembly 120, and the nozzle 130 is disposed in the second mounting groove 123. The output channel 131 in the nozzle 130 is axially extending therethrough.

[0069] The filament 200 enters the preheating section 110 from the top, where it is heated and separated. The outer ring and inner core of the filament 200 are separated by heat in the preheating section 110 and then enter the melting assembly 120 to fully melt the filament 200 and form a molten wire. The melting assembly 120 delivers the molten wire to the output channel 131 of the nozzle 130, which extrudes the molten wire through the output channel 131 for 3D printing.

[0070] See also Figure 3 、 Figure 6 、 Figure 9 、 Figure 11 and Figure 13 In one embodiment, a plurality of melting channels 121 are arranged at intervals along the circumference of the heat conducting member 124 . Figure 9 for Figure 3 A side view of a second embodiment of the melting assembly 120 is shown. Figure 11 for Figure 3 A side view of a third embodiment of the melting assembly 120 is shown. Figure 13 for Figure 3 A side view of a fourth embodiment of a melting assembly 120 is shown.

[0071] After the preheating unit 110 outputs the wire melt and the unmelted portion of the inner core of the consumable 200, the wire melt and the unmelted portion of the inner core enter the respective melting channels 121, so that the consumable 200 can be fully melted after being heated to form a molten wire melt.

[0072] It is worth noting that the cross-sectional shape of the melting channel 121 is not restricted in principle, as long as the melting channel 121 can divert the wire melt of the consumable 200 output by the preheating part 110 and the unmelted part of the inner core, thereby increasing the heating area of ​​the consumable 200.

[0073] See also Figure 3 、 Figure 6 、 Figure 9 、 Figure 11 and Figure 13 In one embodiment, the cross-sectional shape of the melting channel 121 is circular, elliptical, oblong, polygonal, or other regular or irregular shapes. Any shape is acceptable as long as it facilitates the processing and shaping of the melting channel 121 and facilitates the flow of the wire melt and the unmelted portion of the inner core therein.

[0074] In one embodiment, the shapes of the melting channels 121 are the same and / or different. The cross-sectional shapes of the melting channels 121 can be all the same, such as all circular, etc. Of course, the cross-sectional shapes of the melting channels 121 can also be partially different, partially the same, or different.

[0075] It is worth noting that the layout of each melting channel 121 in the melting component 120 is not restricted in principle. Each melting channel 121 can be arranged in a ring shape, for example, in a circle or in two layers inside and outside. Each melting channel 121 can also be arranged in an array, that is, multiple melting channels 121 are arranged in rows, columns, or rows and columns. Each melting channel 121 can also adopt a combination of ring and array arrangements. Of course, each melting channel 121 can also be distributed unevenly.

[0076] See also Figure 7 、 Figure 11 and Figure 13 In one embodiment, the plurality of melting channels 121 include a plurality of first channels 1211 and a plurality of second channels 1212, and the plurality of first channels 1211 are arranged around the circumference of the plurality of second channels 1212; the wire melt output by the preheating unit 110 and the unmelted portion of the inner core can flow into the plurality of first channels 1211 and the plurality of second channels 1212 respectively, and the contact area between the consumable 200 and the melting assembly 120 is increased through the first channels 1211 and the second channels 1212, so that the consumable 200 can be fully heated and melted.

[0077] See also Figure 7 、 Figure 11 and Figure 13 In one embodiment, the number of the second channels 1212 is less than the number of the first channels 1211. In one embodiment, the cross-sectional shape of the first channels 1211 is the same as or different from the cross-sectional shape of the second channels 1212.

[0078] See also Figures 6 to 8 In the first embodiment of the present application, the multiple melting channels 121 are multiple first channels 1211 and multiple second channels 1212, the number of the second channels 1212 is three, the number of the first channels 1211 is six, and the cross-sectional shape of each melting channel 121 is circular. Figure 7 for Figure 6 A side view of the melting assembly 120 is shown, Figure 8 for Figure 7 The cross-sectional view of the melting assembly 120 at CC is shown. In this way, the wire melt outputted from the preheating unit 110 and the unmelted portion of the inner core can flow into the plurality of first channels 1211 and the plurality of second channels 1212 respectively.

[0079] See also Figure 9 and Figure 10 In the second embodiment of the present application, the plurality of melting channels 121 are a plurality of first channels 1211 , the number of the melting channels 121 is six, and the cross-sectional shape of each melting channel 121 is an ellipse or an oblong. Figure 10 for Figure 9The cross-sectional view of the melting assembly 120 at DD is shown. In this way, the wire melt outputted from the preheating unit 110 and the unmelted portion of the inner core can flow into each melting channel 121 respectively.

[0080] See also Figure 11 and Figure 12 In the third embodiment of the present application, the multiple melting channels 121 are multiple first channels 1211 and multiple second channels 1212, the number of second channels 1212 is two, the number of first channels 1211 is eight, and the cross-sectional shape of the second channels 1212 is circular, and the cross-sectional shape of the first channels 1211 is elliptical or oblong. Figure 12 for Figure 11 The cross-sectional view of the melting assembly is shown at EE. In this way, the wire melt outputted from the preheating unit 110 and the unmelted portion of the inner core can flow into the plurality of first channels 1211 and the plurality of second channels 1212 respectively.

[0081] See also Figure 13 and Figure 14 In the fourth embodiment of the present application, the multiple melting channels 121 are multiple first channels 1211 and multiple second channels 1212, the number of second channels 1212 is two, the number of first channels 1211 is eight, and the cross-sectional shape of the second channels 1212 is circular, and the cross-sectional shape of the first channels 1211 is triangular. Figure 14 for Figure 13 The cross-sectional view of the melting assembly is shown at FF. In this way, the wire melt outputted from the preheating unit 110 and the unmelted portion of the inner core can flow into the plurality of first channels 1211 and the plurality of second channels 1212 respectively.

[0082] It should be noted that the above only lists several possible implementation forms of the melting assembly 120. Of course, in other possible implementation forms of the present application, the layout form, quantity and cross-sectional shape of each melting channel 121 can be combined with each other and are not limited here.

[0083] See also Figure 3 、 Figure 4 、 Figure 8 、 Figure 10 、 Figure 12 and Figure 14 In one embodiment, the melting component 120 further has a tapered groove 126 , which is arranged on the side of the melting component 120 toward the flow of the consumable 200 . The diameter of the tapered groove 126 gradually decreases along the flow direction of the consumable 200 , and each melting channel 121 is connected to the tapered groove 126 .

[0084] That is to say, the connection point between the melting assembly 120 and the first mounting groove 122 has a tapered groove 126, and the tapered groove 126 has a structure in which the upper part is larger and the lower part is smaller. The top of the tapered groove 126 is connected to the branch channel 1112 and the main channel 1111 of the preheating part 110, and the inner wall of the tapered groove 126 is connected to each melting channel 121, so that the tapered groove 126 connects each melting channel 121 with the branch channel 1112 and the main channel 1111.

[0085] In this way, the wire melt and the unmelted portion of the inner core outputted from the preheating section 110 can enter the tapered groove 126 , and the tapered groove 126 can play a guiding role, making it easier for the wire melt and the unmelted portion of the inner core to enter each melting channel 121 .

[0086] See also Figure 3 、 Figure 4 、 Figure 8 、 Figure 10 、 Figure 12 and Figure 14 In one embodiment, the tapered groove 126 includes an inclined inner wall 1261 and a groove bottom wall 1262, which are connected to each other. The inclined inner wall 1261 is arranged on the groove bottom wall 1262, extending toward the direction of consumable material entry and expanding outward, forming a flared structure of the tapered groove 126. The preheating unit 110 outputs the molten wire and the unmelted portion of the inner core through the tapered groove 126 and enters each melting channel 121.

[0087] See also Figure 3 、 Figure 4 、 Figure 8 、 Figure 10 、 Figure 12 and Figure 14 In one embodiment, each melting channel 121 is connected to the inclined inner wall 1261, or a portion of the melting channel 121 is provided on the inclined inner wall 1261, and another portion of the melting channel 121 is provided on the bottom wall 1262. Thus, the provision of the inclined inner wall 1261 facilitates the entry of the wire melt and the unmelted portion of the inner core into each melting channel 121.

[0088] like Figures 6 to 8 、 Figures 11 to 14 For example, in each melting channel 121, the first channel 1211 is located on the inclined inner wall 1261 of the tapered groove 126, and the second channel 1212 is located on the bottom wall 1262 of the tapered groove 126. Thus, the inclined inner wall 1261 can guide the wire melt and the unmelted portion of the inner core into the first channel 1211 and the second channel 1212. At the same time, the wire melt and the unmelted portion of the inner core conveyed by the main channel 1111 can also flow directly into the second channel 1212.

[0089] Of course, if Figure 9 and Figure 10 As shown, each melting channel 121 can be provided on the inclined inner wall 1261 and extend to the groove bottom wall 1262. In this way, the inclined inner wall 1261 can guide the wire melt and the unmelted portion of the inner core to flow into each melting channel 121.

[0090] See also Figure 3 、 Figure 4 、 Figure 8 、 Figure 10 、 Figure 12 and Figure 14 In one embodiment, the melting assembly 120 further comprises a receiving groove 127 at one end away from the preheating portion 110. The receiving groove 127 is provided at the bottom of the melting assembly 120 and communicates with the second mounting groove 123. The receiving groove 127 can accommodate the melted wire material.

[0091] The receiving groove 127 is tapered, and the cross-sectional area of ​​the receiving groove 127 gradually increases from top to bottom. On the one hand, the receiving groove 127 can serve as a storage device to store the molten wire melt to meet the needs of continuous extrusion of the wire melt by the nozzle 130. On the other hand, the receiving groove 127 can also serve as a guide to facilitate the entry of the wire melt into the nozzle 130.

[0092] See also Figures 1 to 5 、 Figures 15 to 18 In one embodiment, the preheating portion 110 has a heat conducting channel 111 and a separator 112 . The heat conducting channel 111 penetrates the preheating portion 110 along the axial direction, and the separator 112 is disposed on the inner wall of the heat conducting channel 111 . Figure 15 for Figure 3 The perspective view of the preheating section 110 in the melting nozzle 100 is shown. Figure 16 for Figure 15 The side view of the preheating unit 110 is shown. Figure 17 for Figure 16 The cross-sectional view of the preheating section 110 at GG is shown. Figure 18 for Figure 16 The preheating section 110 is shown in a cross-sectional view at HH.

[0093] The consumable 200 enters the heat transfer channel 111 from the top of the preheating unit 110. The outer ring of the consumable 200 contacts the inner wall of the heat transfer channel 111, and the preheating unit 110 conducts heat to the consumable 200, softening the outer ring of the consumable 200. As the consumable 200 moves through the heat transfer channel 111, the preheating unit 110 conducts more heat to the consumable 200, gradually melting the outer ring of the consumable 200.

[0094] After absorbing heat in the heat-conducting channel 111, the consumable 200 softens from the outside inward. When the consumable 200 abuts the separator 112, the blocking force generated by the separator 112 can separate the outer ring and inner core of the consumable 200 during its movement. That is, the outer ring of the consumable 200 can directly contact the inner wall of the heat-conducting channel 111, and the inner core of the consumable 200 can also directly contact the inner wall of the heat-conducting channel 111. The preheating unit 110 can conduct heat to the outer ring and inner core of the consumable 200 respectively. In this way, the outer ring and inner core of the consumable 200 are heated separately in the heat-conducting channel 111, increasing the heated area of ​​the consumable 200.

[0095] Moreover, after the inner core of the consumable material 200 directly contacts the inner wall of the heat conduction channel 111, the distance between the inner core of the consumable material 200 and the heat source can be reduced, so that the inner core of the consumable material 200 is directly heated, the melting rate of the inner core of the consumable material 200 is increased, and the printing quality is ensured.

[0096] That is to say, the preheating part 110 transfers heat and separates the consumables 200 in the heat conduction channel 111 through the cooperation between the heat conduction channel 111 and the separation piece 112, so as to increase the contact area between the consumables 200 and the preheating part 110, thereby increasing the heated area of ​​the consumables 200 and improving the melting efficiency of the consumables 200.

[0097] At the same time, after the consumable 200 is heated in the heat conduction channel 111, its outer ring has softened or even melted. At this time, the separator 112 can separate the softened or even melted outer ring of the consumable 200 from the inner core, reducing the conveying resistance of the consumable 200 and facilitating the conveying of the consumable 200.

[0098] The wire melt and the unmelted portion of the inner core output by the preheating section 110 can enter the various melting channels 121 of the melting component 120. At this time, the heat conductor 124 and the support ribs 125 can conduct heat to the wire melt and the unmelted portion of the inner core in each melting channel 121, so that the consumables 200 can be fully melted after being heated to form a molten wire melt.

[0099] When the melting nozzle 100 is in operation, the consumable 200 enters the heat conduction channel 111 from the top of the preheating section 110 and moves within the heat conduction channel 111. During this process, the preheating section 110 can transfer heat to the consumable 200. Due to the contact between the outer ring of the consumable 200 and the inner wall of the heat conduction channel 111, the outer ring of the consumable 200 will soften and gradually melt. When the consumable 200 moves within the heat conduction channel 111 to the separator 112, the separator 112 can separate the outer ring of the consumable 200 from the inner core, thereby increasing the heating area of ​​the consumable 200 and allowing the inner core of the consumable 200 to be heated quickly.

[0100] The melt nozzle 100 of the above embodiment uses a preheating unit 110 to conduct heat to the heat conduction channel 111 to preheat the consumable 200. The outer ring and inner core of the consumable 200 are separated by a separator 112, so that the inner core can directly contact the preheating unit 110. This allows the outer ring and inner core of the consumable 200 to be transported and heated separately, reducing the transport resistance of the consumable 200 and increasing the heated area of ​​the consumable 200. In this way, the consumable 200 can be melted quickly, improving the melting efficiency, meeting the melting requirements of the consumable 200 during high-speed printing, improving printing speed, and ensuring print quality.

[0101] It is worth noting that the 3D printer has a propulsion mechanism (not shown) for the consumable 200 , which provides a propulsion force to propel the consumable 200 into the preheating portion 110 and the melting assembly 120 , thereby extruding the wire melt from the nozzle 130 .

[0102] In one embodiment, the melt nozzle 100 further includes a heating element (not shown), which is disposed around the melting assembly 120 to heat the melting assembly 120. The heating element can generate heat when in operation, and this heat can be transferred to the melting assembly 120, which conducts the heat to the preheating unit 110 through the melting assembly 120, and then transfers the heat to the consumables 200. Of course, the heating element can also be disposed around the melting assembly 120 and the preheating unit 110. Optionally, the heating element is a heating wire. Of course, in other embodiments of the present application, the heating element can also be other components that can generate heat.

[0103] In one embodiment, the preheating unit 110 and the melting assembly 120 are made of a material with a high thermal conductivity. This allows the preheating unit 110 and the melting assembly 120 to have a certain thermal conductivity, transferring heat from the heating element to the preheating unit 110 and the consumable 200. Furthermore, the preheating unit 110 and the melting assembly 120 can transfer heat to the consumable 200, causing it to melt. Alternatively, the melting assembly 120 is made of materials such as copper or aluminum.

[0104] See also Figure 3 、 Figure 4 、 Figures 15 to 18 In one embodiment, a predetermined distance exists between the separator 112 and the end of the preheating section 110 away from the melting assembly 120. In other words, a preheating distance exists between the separator 112 and the top of the preheating section 110. This means that after the consumable 200 enters the heat transfer channel 111, it does not initially contact the separator 112. At this point, the preheating section 110 can transfer heat to the consumable 200, which then moves to the separator 112 to separate the outer ring from the inner core.

[0105] In this way, the consumable material 200 can be heated first and then separated. After the consumable material 200 is heated, the outer ring of the consumable material 200 can soften. At this time, after the consumable material 200 contacts the separator 112, the separator 112 can directly separate the outer ring of the consumable material 200 from the inner core.

[0106] See also Figures 1 to 4 、 Figure 15 In one embodiment, the top of the preheating unit 110 has a third mounting groove 113 for mounting the throat structure 300. With the bottom of the throat structure 300 positioned in the third mounting groove 113, the throat structure 300 can introduce the consumables 200 into the heat conduction channel 111 of the preheating unit 110, thereby guiding the consumables 200 into the heat conduction channel 111.

[0107] See also Figure 3 、 Figure 4 、 Figures 15 to 18 In one embodiment, the heat conduction channel 111 includes a main channel 1111 and two branch channels 1112. The two branch channels 1112 are arranged on both sides of the main channel 1111 and connected to the main channel 1111. The separator 112 is arranged in the main channel 1111. Figure 3 、 Figure 4 、 Figures 15 to 18 In the figure, the main channel 1111 is located in the middle area, and the two branch channels 1112 are located on both sides of the main channel 1111 and are connected to the main channel 1111.

[0108] The branch channel 1112 is used to accommodate the outer ring of the consumable 200 separated by the separator 112. The inner core of the consumable 200 separated by the separator 112 moves along the main channel 1111. After the consumable 200 passes through the throat structure 300 and the top of the preheating unit 110 and enters the main channel 1111, the consumable 200 can contact the separator 112, which can separate the melted outer ring of the consumable 200 from the unmelted inner core.

[0109] At this time, the outer ring of the consumable 200 can move in the branch channel 1112, and the inner core of the consumable 200 can move in the main channel 1111. During this process, the preheating unit 110 transfers heat to the outer ring of the consumable 200 through the inner wall of the branch channel 1112, and transfers heat to the inner core of the consumable 200 through the inner wall of the main channel 1111, so that the outer ring and the inner core of the consumable 200 are heated separately, increasing the heated area, reducing the distance between the inner core of the consumable 200 and the heat source, and improving the melting efficiency of the consumable 200.

[0110] See also Figure 3 、 Figures 15 to 18In one embodiment, the branch channel 1112 is connected to the main channel 1111 at the side. In this way, after the separator 112 separates the outer ring and the inner core of the consumable 200 in the main channel 1111, the outer ring of the consumable 200 can directly enter the branch channel 1112 at the side of the main channel 1111. Of course, in other embodiments of the present application, the top of the main channel 1111 can also be connected to the branch channel 1112. In this way, the separator 112 separates the outer ring and the inner core of the consumable 200 at the top of the main channel 1111, the outer ring of the consumable 200 directly enters the branch channel 1112, and the inner core of the consumable 200 directly enters the main channel 1111.

[0111] See also Figure 3 、 Figures 15 to 18 In one embodiment of the present application, the separator 112 includes a plurality of separation steps 1121, which are disposed on at least a portion of the inner wall of the main channel 1111. The width of the plurality of separation steps 1121 increases step by step along the flow direction of the consumable 200, so that the main channel 1111 is tapered.

[0112] After multiple separation steps 1121 are provided on at least a portion of the inner wall of the main channel 1111, the inner diameter of the main channel 1111 gradually decreases from top to bottom, forming a tapered stepped structure. After the consumable 200 enters the main channel 1111, the separation step 1121 on the previous level separates the outer ring and the inner core of the consumable 200. The separation step 1121 can then directly transfer heat to the inner core of the consumable 200.

[0113] The outer ring of the inner core of the consumable 200 can be softened by heat. When the inner core of the consumable 200 moves to the next separation step 1121 in the main channel 1111, the next separation step 1121 can separate the outer ring of the inner core of the consumable 200 again. In this way, the multiple separation steps 1121 can achieve step-by-step separation of the consumable 200, gradually reducing the cross-sectional area of ​​the inner core of the consumable 200, increasing the heated area of ​​the consumable 200, improving the melting efficiency of the consumable 200, and making the consumable 200 easier to melt.

[0114] Illustratively, there are two separation steps 1121, which are arranged to project step by step from top to bottom, and are located on opposite inner walls of the main channel 1111. Thus, the two separation steps 1121 can form a three-stage tapered main channel 1111, thereby separating the consumable 200 twice. In this way, the consumable 200 separates while being heated in the preheating section 110, allowing the inner core of the consumable 200 to gradually come into contact with the heat source, thereby increasing the melting efficiency of the consumable 200.

[0115] Of course, in other embodiments of the present application, the number of separation steps 1121 can also be three or even more, and the multiple separation steps 1121 can be set on one side inner wall or both sides inner walls of the main channel 1111.

[0116] In other embodiments of the present application, the separator 112 may also be a separation plate, which is symmetrically arranged in the main channel 1111 to separate the outer ring and the inner core of the consumable 200. Of course, the separator 112 may also be a separation column or other structure that can separate the outer ring and the inner ring of the consumable 200.

[0117] The melting nozzle 100 of the present application, when the consumable 200 enters the preheating part 110, the preheating part 110 can preheat and separate the consumable 200. The preheated consumable 200 becomes a viscoelastic state and enters the various melting channels 121 of the melting component 120, thereby increasing the contact area between the consumable 200 and the hot surface, thereby ensuring heat conduction, improving the heating effect, preventing the outer ring of the consumable 200 from insulating the inner core, improving the heat transfer effect, and improving the melting efficiency of the consumable 200.

[0118] The melting nozzle 100 is provided with a separator 112 in the main channel 1111 of the preheating section 110. After the consumable 200 enters the preheating section 110, it is preheated and separated at the same time, thereby improving the overall melting efficiency of the consumable 200 and reducing the feeding resistance. Compared with the current method of increasing the contact area, this application can achieve faster feeding speed and higher melting efficiency. At the same time, after providing multiple small-cross-section melting channels 121 on the melting component 120, the contact area between the melting channels 121 and the consumable 200 can be guaranteed, so that the consumable 200 can be completely melted.

[0119] See also Figures 1 to 5 The present application further provides a 3D printer, comprising a throat structure 300 and a melting nozzle 100 as in any of the above embodiments, wherein the throat structure 300 is disposed at one end of the melting nozzle 100. The throat structure 300 is disposed at the top of the melting nozzle 100 to guide the consumable 200 into the preheating section 110.

[0120] After the 3D printer of the present application adopts the melting nozzle 100 of the above embodiment, it can increase the heating area of ​​the consumables 200, so that the consumables 200 can be melted quickly, avoiding the situation of nozzle clogging, and increasing the extrusion rate of the melting nozzle 100 to improve printing efficiency and ensure printing quality.

[0121] See also Figures 1 to 5In one embodiment, the throat structure 300 includes a connector 310 and a throat 320. The throat 320 is arranged in the connector 310 and extends axially out of the connector 310. The connector 310 is arranged in the third mounting groove 113 at the top of the preheating section 110. The throat 320 can be docked with the propulsion mechanism of the consumable 200 to transport the consumable 200 to the heat conduction channel 111 of the preheating section 110 through the throat 320.

[0122] See also Figures 1 to 4 In one embodiment, the throat structure 300 further includes a heat sink 330, which is disposed on the outside of the throat 320 and has a predetermined distance from the connector 310. The heat sink 330 can dissipate heat. After the melting assembly 120 transfers heat to the preheating portion 110 and the consumables 200, the connector 310 and the throat 320 will also be heated due to heat conduction. At this time, the heat sink 330 can dissipate the heat of the throat 320, minimizing the heating of the consumables 200 in the throat 320, thereby preventing the consumables 200 from melting in the throat 320 and blocking the throat 320.

[0123] At the same time, there is a certain distance between the heat sink 330 and the connector 310 in the axial direction, so that the connector 310 does not directly conduct heat to the heat sink 330. It is worth noting that the structural form of the heat sink 330 is not limited in principle, as long as it can achieve heat dissipation, for example, it can be set as fins and used in conjunction with a fan, etc.

[0124] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A melting assembly, characterized in that: include: Thermal conductors; as well as Support ribs, the support ribs being arranged on the heat conducting member, and a melting channel being formed between two adjacent support ribs; A plurality of the supporting ribs form a plurality of the melting channels on the heat conducting member.

2. The melting assembly according to claim 1, wherein: A plurality of melting channels are arranged at intervals along the circumference of the heat conducting member.

3. The melting assembly according to claim 1 or 2, characterized in that The plurality of melting channels include a plurality of first channels and a plurality of second channels. The plurality of first channels are disposed around the circumference of the plurality of second channels.

4. The melting assembly according to claim 1, wherein: The melting assembly further comprises a tapered groove, which is arranged on a side of the melting assembly toward which the consumables flow; The diameter of the tapered groove gradually decreases along the flow direction of the consumables, and each of the melting channels is connected to the tapered groove.

5. The melting assembly according to claim 4, wherein: The tapered groove includes an inclined inner wall and a groove bottom wall, and the inclined inner wall is connected to the groove bottom wall.

6. The melting assembly according to claim 5, wherein: A plurality of first channels in each of the melting channels are arranged on the inclined inner wall of the tapered groove, and a plurality of second channels in each of the melting channels are arranged on the groove bottom wall of the tapered groove.

7. A melting nozzle, characterized in that comprising a nozzle, a preheating portion, and a melting assembly according to any one of claims 1 to 6; One end of the melting assembly at least accommodates a portion of the preheating portion, and the nozzle is connected to the other end of the melting assembly; The preheating part comprises a heat conduction channel and a separator. The heat conduction channel penetrates the preheating part in the axial direction. The separator is arranged on the inner wall of the heat conduction channel.

8. The melting nozzle according to claim 7, characterized in that The heat conduction channel includes a main channel and two branch channels. The two branch channels are arranged on both sides of the main channel and are connected to the main channel.

9. The melting nozzle according to claim 8, characterized in that The separation member includes a plurality of separation steps, and the plurality of separation steps are provided on at least a portion of the inner wall of the main channel; The widths of the multiple separation steps increase step by step along the flow direction of the consumables, so that the main channel is gradually contracted.

10. A 3D printer, characterized in that: It comprises a throat structure and the melting nozzle according to any one of claims 7 to 9, wherein the throat structure is arranged at one end of the melting nozzle.

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