Melting nozzle and 3D printer

Abstract

The utility model relates to a melting nozzle and a 3D printer. The melting nozzle comprises a heat conduction part and a nozzle body, wherein the heat conduction part is provided with a mounting channel penetrating in the axial direction; the preheating component is arranged in the mounting channel, and the preheating component is provided with a preheating channel penetrating in the axial direction; the first insertion part comprises a first main body and a first separation part, the first main body is arranged in the mounting channel and located at the outlet of the preheating part, the first separation part is arranged in the first main body in the axial direction, and an inner cavity of the first main body is divided into a first channel and a second channel by the first separation part; the first channel and the second channel communicate with the preheating channel. The first inserting part can separate the solid wire rod, so that the solid wire rod is conveyed and heated respectively, the heating area of the solid wire rod is increased, the first separating part can transfer heat to the solid wire rod more quickly, the melting efficiency is improved, the extrusion rate of the melting nozzle is increased, and the printing speed is increased.

Description

Technical Field

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

[0002] The FDM (Fused Deposition Modeling) type 3D printer uses solid wire as the printing consumable, and the nozzle of the 3D printer is used to melt and extrude the molten solid wire. Specifically, the solid wire enters the nozzle under the action of an external force, is heated and melted in the nozzle, and is extruded from the nozzle outlet, and is laminated layer by layer to print a 3D model.

[0003] Currently, when the nozzle melts the solid wire, the outer layer of the solid wire contacts the heat source, and the inner core of the solid wire is far from the heat source, resulting in low heating efficiency. Moreover, when the solid wire moves in the nozzle, it contacts the heat source as a whole, resulting in too large a moving resistance of the solid wire in the nozzle. In this way, the solid wire cannot be melted quickly, and the nozzle is blocked, resulting in low printing efficiency and affecting the printing quality. Summary of the Utility Model

[0004] Based on this, in view of the problem that the inner core of the current solid wire is far from the heat source, which affects the heating efficiency and printing efficiency, it is necessary to provide a melting nozzle and a 3D printer, which can increase the heating area of the solid wire, realize separate heating of the outer ring and the inner core, enable the inner core to be heated faster, improve the melting efficiency, and ensure the printing quality and printing speed.

[0005] A melting nozzle, comprising:

[0006] A heat-conducting member having an installation channel axially penetrating therethrough;

[0007] A preheating member disposed in the installation channel, the preheating member having a preheating channel axially penetrating therethrough; and

[0008] A first insertion member, including a first main body and a first separating member, the first main body is disposed in the installation channel and is located at the outlet of the preheating member, the first separating member is axially disposed in the first main body, and the first separating member divides the inner cavity of the first main body into a first channel and a second channel, and both the first channel and the second channel communicate with the preheating channel.

[0009] In an embodiment of the present application, the first separating member is at least one, and the first separating member is disposed in the axial direction of the first main body and encloses the first channel and the second channel with the first main body;

[0010] And / or, there are two first separating members, and the two first separating members are spaced apart in the first main body. The two first separating members enclose the first channel, and each first separating member and the inner wall of the first main body enclose the second channel;

[0011] The two first separating members approach each other at one end far from the preheating component, and / or the axial length of the first separating member is less than the axial length of the first main body.

[0012] In an embodiment of the present application, the melting nozzle further includes a second insertion component coaxially arranged with the first insertion component;

[0013] The second insertion component includes a second main body and a second separating member. The second main body is arranged in the installation channel and is located at the outlet of the first insertion component. The second separating member is arranged in the middle area of the second main body. The second separating member divides the inner cavity of the second main body into a third channel and a fourth channel, and both the third channel and the fourth channel communicate with the first channel and the second channel.

[0014] In an embodiment of the present application, one end of the second separating member facing the first insertion component has a first tip, and the end of the second separating member far from the first insertion component has a second tip;

[0015] And / or, the second main body has a protruding heat-conducting protrusion, and the heat-conducting protrusion protrudes in the third channel and / or the fourth channel.

[0016] In an embodiment of the present application, the melting nozzle further includes an alignment component, and the alignment component includes a first positioning portion and a second positioning portion. The first positioning portion is arranged at one end of the first insertion component facing the second insertion component, and the second positioning portion is arranged at the first section of the second insertion component facing the first insertion component. The first positioning portion and the second positioning portion are in positioning cooperation.

[0017] In an embodiment of the present application, the preheating component further has a preheating protrusion and a preheating groove. The preheating protrusion protrudes from the inner wall of the preheating channel, and the preheating groove is recessed in the inner wall of the preheating channel;

[0018] One end of the preheating protrusion far from the first insertion component has a conical protrusion, and / or the preheating groove penetrates through one end of the preheating component facing the first insertion component, and the cross-sectional dimension of the preheating groove gradually increases in the direction close to the first insertion component.

[0019] In an embodiment of the present application, the melting nozzle further includes a melting component, which is located at an end of the first insertion component away from the preheating component. The melting component has a melting channel, and the melting channel communicates with the first channel and the second channel;

[0020] The melting component includes a melting body and support ribs. The support ribs are arranged axially in the melting body to form a plurality of the melting channels in the melting body.

[0021] In an embodiment of the present application, the melting component further includes a support ring, which is arranged in the melting body. The support ribs include a first rib and a second rib. The first rib is arranged in the support ring and encloses a plurality of first flow channels with the support ring. The second rib is arranged between the melting body and the support ring and supports and connects the melting body and the support ring. The second rib, the support ring and the melting body enclose a plurality of second flow channels; the first flow channels and the second flow channels communicate with the first channel and the second channel;

[0022] The first rib and the second rib are arranged staggeredly in the circumferential direction; and / or, the end of the melting body away from the first insertion component has a receiving cavity.

[0023] A 3D printer includes a throat structure and the melting nozzle as described in any of the above technical features, and the throat structure is arranged on the melting nozzle.

[0024] In an embodiment of the present application, the melting nozzle further has a nozzle body, which has an output channel. The nozzle body is arranged at one end of the heat-conducting component of the melting nozzle, and the output channel communicates with the first channel and the second channel in the melting nozzle.

[0025] After adopting the above technical solution, the present application has at least the following technical effects:

[0026] In the melting nozzle and the 3D printer of the present application, the preheating component and the first insertion component are arranged axially in the installation channel of the heat-conducting component, and the heat-conducting component can conduct heat to the preheating component and the first body. After the solid wire enters the preheating channel of the preheating component, the preheating component can transfer heat to the solid wire, so that the outer circle of the solid wire is gradually softened or even melted by heat. When the solid wire moves to the first insertion component, the solid wire can contact the first separating member, and the first separating member can separate the solid wire into the first channel and the second channel, and the melted solid wire in the first channel and the second channel can be extruded by the melting nozzle.

[0027] The melting nozzle uses a heat-conducting component to conduct heat to the internal preheating component and the first insertion component. After preheating the outer circle of the solid wire through the preheating component, the solid wire is separated into a first channel and a second channel through the first insertion component. In this way, the solid wire can be transported and heated separately, increasing the heating area of the solid wire, reducing the heat transfer distance between the inner core of the solid wire and the heat source, and enabling the first separation component to transfer heat to the inner core faster. Thus, the solid wire can be melted quickly, improving the melting efficiency, avoiding clogging of the melting nozzle, increasing the extrusion rate of the melting nozzle, improving the printing speed, and ensuring the printing quality. Description of the Drawings

[0028] Figure 1 Is a perspective view of the melting nozzle according to an embodiment of the present application.

[0029] Figure 2 Is Figure 1 The front view of the melting nozzle shown.

[0030] Figure 3 Is Figure 2 The cross-sectional view of the melting nozzle shown at A-A.

[0031] Figure 4 Is Figure 3 The schematic diagram of transporting the solid wire in the melting nozzle shown.

[0032] Figure 5 Is Figure 3 The front view of the first insertion component in the melting nozzle shown.

[0033] Figure 6 Is Figure 5 The cross-sectional view of the first insertion component shown at B-B.

[0034] Figure 7 Is Figure 5 The top view of the first insertion component shown.

[0035] Figure 8 Is Figure 5 The perspective view of the first insertion component shown.

[0036] Figure 9 Is Figure 3 The front view of the second insertion component in the melting nozzle shown.

[0037] Figure 10 Is Figure 9 The cross-sectional view of the second insertion component shown at C-C.

[0038] Figure 11 Is Figure 9 The top view of the second insertion component shown.

[0039] Figure 12 The Figure 9 sectional view of the second insertion component shown.

[0040] Figure 13 The Figure 3 front view of the preheating component shown.

[0041] Figure 14 The Figure 13 sectional view of the preheating component at D-D shown.

[0042] Figure 15 The Figure 13 top view of the preheating component shown.

[0043] Figure 16 The Figure 13 isometric view of the preheating component shown.

[0044] Figure 17 The Figure 3 front view of the melting component described.

[0045] Figure 18 The Figure 17 isometric view of the melting component shown.

[0046] Figure 19 The Figure 17 top view of the melting component shown.

[0047] Wherein: 100, melting nozzle; 110, heat conducting component; 111, installation channel; 120, preheating component; 121, preheating channel; 1211, first preheating section; 1212, tapered section; 1213, second preheating section; 122, preheating protrusion; 123, preheating groove; 130, first insertion component; 131, first main body; 132, first separating piece; 133, first channel; 134, second channel; 140, second insertion component; 141, second main body; 1411, heat conducting protrusion; 142, second separating piece; 1421, first tip; 1422, second tip; 143, third channel; 144, fourth channel; 150, alignment component; 151, first positioning portion; 152, second positioning portion; 160, melting component; 161, melting main body; 1611, accommodating cavity; 162, support rib; 1621, first rib; 1622, second rib; 163, melting channel; 1631, first flow channel; 1632, second flow channel; 164, support ring; 170, nozzle main body; 171, output channel; 200, solid wire; 300, throat structure; 310, connecting piece; 320, throat; 330, heat dissipating piece. Specific embodiments

[0048] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These 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 thus should not be construed as a limitation of the present application.

[0050] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0051] In the present application, unless otherwise clearly specified and limited, if terms such as "installation", "connection", "connection", "fixation", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0052] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0054] It can be understood that currently when the nozzle melts the solid wire, the outer layer of the solid wire contacts the heat source, and the inner core of the solid wire is far from the heat source, resulting in low heating efficiency. Moreover, when the solid wire moves in the nozzle, it contacts the heat source as a whole, resulting in too large a moving resistance of the solid wire in the nozzle. In this way, the solid wire cannot be melted quickly, resulting in nozzle blockage and low printing efficiency, affecting the printing quality.

[0055] See Figures 1 to 4 , for this reason, this application provides a melting nozzle 100. Figure 1 is a perspective view of the melting nozzle 100 according to an embodiment of this application, Figure 2 is Figure 1 the front view of the melting nozzle 100 shown in Figure 3 is Figure 2 the sectional view of the melting nozzle 100 shown in Figure 4 is Figure 3 the schematic diagram of conveying the solid wire 200 in the melting nozzle 100 shown in . This melting nozzle 100 is mainly applied to a 3D printer. After the solid wire 200 is conveyed to the melting nozzle 100, the melting nozzle 100 can transfer heat to the solid wire 200 so that the solid wire 200 is heated and melted into a wire melt, and the wire melt is extruded to achieve 3D printing operations. Of course, in other embodiments of this application, this melting nozzle 100 can also be applied to equipment such as thermal spraying that requires the use of the melting nozzle 100.

[0056] This application is illustrated by taking the melting nozzle 100 applied in a 3D printer as an example. The melting nozzle 100 can separate the solid wire 200, realize the transportation and heating of the solid wire 200, reduce the movement resistance of the solid wire 200 during transportation, increase the heating area of the solid wire 200, reduce the heat transfer distance between the inner core of the solid wire 200 and the heat source, so as to transfer heat to the inner core faster, and then enable the solid wire 200 to melt quickly, improve the melting efficiency, avoid the situation of blocking the melting nozzle 100, improve the extrusion efficiency of the melting nozzle 100, and ensure the printing quality and printing speed.

[0057] The following introduces the specific structure of the melting nozzle 100 in an embodiment.

[0058] See Figures 1 to 8 , in an embodiment, the melting nozzle 100 includes a heat-conducting component 110, a preheating component 120, and a first insertion component 130. The heat-conducting component 110 has an installation channel 111 penetrating axially. The preheating component 120 is arranged in the installation channel 111, and the preheating component 120 has a preheating channel 121 penetrating axially. The first insertion component 130 includes a first main body 131 and a first separating piece 132. The first main body 131 is arranged in the installation channel 111 and is located at the outlet of the preheating component 120. The first separating piece 132 is arranged axially in the first main body 131.

[0059] The first separating piece 132 divides the first main body 131 into a first channel 133 and a second channel 134, and both the first channel 133 and the second channel 134 communicate with the preheating channel 121. Figure 5 For Figure 3 the front view of the first insertion component 130 in the melting nozzle 100 shown, Figure 6 For Figure 5 the sectional view of the first insertion component 130 at B-B shown, Figure 7 For Figure 5 the top view of the first insertion component 130 shown, Figure 8 For Figure 5 the three-dimensional perspective view of the first insertion component 130 shown.

[0060] The heat-conducting component 110 can achieve heat conduction. The heat-conducting component 110 is hollowly arranged, and the inner cavity of the heat-conducting component 110 is the installation channel 111. The installation channel 111 penetrates the heat-conducting component 110 axially. The axial direction here refers to the axial direction of the heat-conducting component 110, that is, the height direction of the heat-conducting component 110. As Figures 1 to 4 shown, the connection direction between the top and the bottom of the heat-conducting component 110 is the axial direction of the heat-conducting component 110, and the circumferential direction is the circumferential direction of the heat-conducting component 110. This axial direction and circumferential direction are also applicable to other components, and will not be elaborated later.

[0061] The preheating component 120 and the first insertion component 130 are installed in the installation channel 111 from top to bottom. The preheating component 120 is installed above the first insertion component 130, that is, the first insertion component 130 is located at the outlet of the preheating component 120, and the preheating component 120 is located at the inlet of the first insertion component 130. The inlet and outlet of the present application are set according to the moving direction of the solid wire 200. The port where the solid wire 200 enters is the inlet, and the port where the solid wire 200 is output is the outlet. This inlet and outlet are also applicable to other components and will not be elaborated hereinafter.

[0062] The preheating component 120 is used to preheat the solid wire 200. The preheating component 120 is hollow, and the hollow cavity of the preheating component 120 is the preheating channel 121. The solid wire 200 can enter the preheating channel 121 of the preheating component 120 from the top of the heat conducting component 110. At this time, the heat conducting component 110 can transfer heat to the solid wire 200 in the preheating channel 121 through the preheating component 120. The outer ring of the solid wire 200 can be softened and gradually melted after being heated.

[0063] After the solid wire 200 absorbs heat in the preheating component 120, the solid wire 200 softens from the outside to the inside. In order to ensure that the melting nozzle 100 can output the wire melt and avoid the situation that the inner core of the solid wire 200 is not melted, the first insertion component 130 is provided in the installation channel 111 in the present application. After the solid wire 200 is output from the preheating component 120 and enters the first insertion component 130, the first insertion component 130 can separate the solid wire 200. At this time, the heat conducting component 110 can transfer heat to the solid wire 200 through the first insertion component 130 respectively, separate and heat the solid wire 200 respectively, increase the heating area of the solid wire 200, so that the solid wire 200 can be fully melted.

[0064] The first insertion component 130 includes a first main body 131 and a first separating member 132. The first main body 131 is arranged in the installation channel 111 and is located at the outlet of the preheating component 120. The first main body 131 is hollow, and the hollow cavity of the first main body 131 is the first inner cavity. The first separating member 132 is arranged in the first inner cavity and is connected to the inner wall of the first main body 131. The first separating member 132 can divide the first inner cavity into a first channel 133 and a second channel 134, and the tops of the first channel 133 and the second channel 134 are both communicated with the preheating channel 121.

[0065] After the solid wire 200 enters the first insertion member 130 from the preheating member 120, since the outer ring of the solid wire 200 has been softened or even melted, at this time, the first separating member 132 can contact the solid wire 200. During the movement of the solid wire 200, the blocking force generated by the first separating member 132 can cause the solid wire 200 to separate, thereby softening the solid wire 200 in contact with the first separating member 132 and the first main body 131.

[0066] See Figures 1 to 4 , after the first separating member 132 separates the solid wire 200, the inner core of the solid wire 200 can directly enter the first channel 133 along the vertical direction. The heat conducting member 110 can transfer heat to the first separating member 132 through the first main body 131, and the first separating member 132 can also be affected by the thermal radiation of the first main body 131, so that the first separating member 132 can conduct heat to the inner core of the solid wire 200 in the first channel 133. In this way, the inner core of the solid wire 200 can be gradually melted by heat in the first channel 133 and move in the first channel 133.

[0067] When the inner core of the solid wire 200 is heated in the first channel 133, the inner core of the solid wire 200 can directly contact the first separating member 132, that is, the first separating member 132 can directly transfer heat to the inner core of the solid wire 200, reducing the distance between the inner core and the heat source, enabling the inner core of the solid wire 200 to be directly heated, and thus the inner core of the solid wire 200 can be quickly melted. This avoids nozzle blockage and ensures printing quality.

[0068] Moreover, the outer ring of the solid wire 200 is heated in the second channel 134, and the inner core of the solid wire 200 is heated in the first channel 133. The outer ring and the inner core of the solid wire 200 can be heated separately, increasing the contact area between the solid wire 200 and the first insertion member 130, thereby increasing the heat receiving area of the solid wire 200, improving the melting efficiency of the solid wire 200, and enabling the solid wire 200 to be fully melted. The wire melt generated after the solid wire 200 melts can meet the requirements of the extrusion rate of the melting nozzle 100, so as to improve the printing efficiency.

[0069] When the melting nozzle 100 is working, the solid wire 200 enters the preheating channel 121 of the preheating component 120 from the top of the heat-conducting component 110 and moves in the preheating channel 121. During this process, the preheating component 120 can conduct the heat transferred by the heat-conducting component 110 to the solid wire 200. Since the outer ring of the solid wire 200 is in contact with the inner wall of the preheating channel 121, the outer ring of the solid wire 200 will soften and gradually melt. When the solid wire 200 moves out of the preheating component 120 and enters the first insertion component 130, the first separating part 132 can separate the outer ring and the inner core of the solid wire 200. The outer ring of the solid wire 200 enters the second channel 134, and the inner core of the solid wire 200 enters the first channel 133. Moreover, the outer ring of the solid wire 200 is heated and melted and moves in the second channel 134, and the inner core of the solid wire 200 is heated and gradually melted and moves in the first channel 133, so that the solid wire 200 can be fully melted after being heated. Furthermore, the melting nozzle 100 can extrude the wire melt for 3D printing operations.

[0070] For the melting nozzle 100 of the above embodiment, the heat-conducting component 110 is used to conduct heat to the internal preheating component 120 and the first insertion component 130. After the outer ring of the solid wire 200 is preheated by the preheating component 120, the first insertion component 130 separates the outer ring and the inner core of the solid wire 200. In this way, the outer ring and the inner core of the solid wire 200 can be respectively transported and heated, reducing the moving resistance of the solid wire 200 during transportation, increasing the heat-receiving area of the solid wire 200, reducing the heat-transfer distance between the inner core and the heat source, and enabling the first separating part 132 to transfer heat to the inner core faster. Thus, the solid wire 200 can be quickly melted, the melting efficiency is improved, the situation of blocking the melting nozzle 100 is avoided, the extrusion rate of the melting nozzle 100 is increased, so as to improve the printing speed and ensure the printing quality.

[0071] See Figures 1 to 4 , in an embodiment, the melting nozzle 100 further has a nozzle body 170. The nozzle body 170 has an output channel 171. The nozzle body 170 is arranged at one end of the heat-conducting component 110, and the output channel 171 is communicated with the first channel 133 and the second channel 134. The nozzle body 170 is arranged at the bottom of the heat-conducting component 110. The output channel 171 in the nozzle body 170 is arranged axially through, and moreover, the output channel 171 can be communicated with the first channel 133 and the second channel 134.

[0072] The solid wire 200 enters the preheating channel 121 from one end of the heat-conducting component 110 that is far from the nozzle body 170, that is, the solid wire 200 enters the preheating channel 121 from the top of the heat-conducting component 110. After the outer ring and the inner core of the solid wire 200 are separated by the first insertion component 130, the solid wire 200 can be completely melted. In this way, the first insertion component 130 can output the completely melted wire melt through the first channel 133 and the second channel 134. Furthermore, the wire melt can enter the output channel 171 of the nozzle body 170, and the nozzle body 170 extrudes the wire melt through the output channel 171 to perform a 3D printing operation.

[0073] It should be noted that the 3D printer has a propulsion mechanism (not shown) for the solid wire 200. The propulsion mechanism provides a propulsion force to push the solid wire 200 into the preheating component 120 and the first insertion component 130. Moreover, there will be a certain resistance during the movement of the solid wire 200 after melting. The propulsion force provided by the propulsion mechanism can make the solid wire 200 move, and this propulsion force can also prevent the wire melt from blocking in the preheating channel 121, the first channel 133 and the second channel 134, so as to facilitate the extrusion of the wire melt by the nozzle body 170.

[0074] In one embodiment, the melting nozzle 100 further includes a heating element (not shown). The heating element surrounds the circumferential side of the heat-conducting component 110 to heat the heat-conducting component 110. When the heating element works, it can generate heat, and this heat can be transferred to the heat-conducting component 110, and then the heat is conducted to the solid wire 200 in the conveying channel through the heat-conducting component 110 to heat the solid wire 200. 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.

[0075] In one embodiment, the number of the first separating members 132 is at least one. The first separating members 132 are arranged in the axial direction of the first main body 131 and enclose the first channel 133 and the second channel 134 with the first main body 131. That is to say, the number of the first separating members 132 can be one. One first separating member 132 is located in the middle area of the first inner cavity of the first main body 131, and the first separating member 131 divides the first inner cavity into the first channel 133 and the second channel 134.

[0076] When the solid wire 200 enters the first insertion component 130 from the preheating channel 121, the top of the first separating member 131 can contact the solid wire 200 to separate the solid wire 200, and make the separated solid wire 200 enter the first channel 133 and the second channel 134 respectively, increasing the heating area of the solid wire 200.

[0077] Optionally, the first separating member 132 is provided in a plate shape. Of course, in other embodiments of the present application, the first separating member 132 can also be a cone or an ellipsoid. The first separating member 132 has a first channel 133 inside, and a second channel 134 is defined by the outer wall of the first separating member 132 and the inner wall of the first main body 131.

[0078] See Figures 3 to 8 , in this embodiment, there are two first separating members 132, and the two first separating members 132 are spaced apart in the first main body 131. The two first separating members 132 enclose the first channel 133, and each first separating member 132 and the inner wall of the first main body 131 enclose the second channel 134.

[0079] The two first separating members 132 are disposed substantially along the axial direction in the first inner cavity of the first main body 131. The edge of the first separating member 132 is in contact with the inner wall of the first main body 131, and there is a certain distance between the two first separating members 132 in the radial direction of the heat conducting member 110, that is, the two first separating members 132 are spaced apart in the horizontal direction. In this way, the space between the two first separating members 132 is the first channel 133, and the spaces on the opposite sides of the two first separating members 132 are the second channels 134.

[0080] When the solid wire 200 enters the first inserting member 130 from the preheating channel 121, the tops of the two first separating members 132 can contact the solid wire 200. During the movement of the solid wire 200, the blocking force generated by the first separating member 132 can separate the outer circle and the inner core of the solid wire 200. The outer circle of the solid wire 200 enters the second channel 134, and the first main body 131 and the first separating member 132 can transfer heat to the outer circle of the solid wire 200 in the second channel 134. The inner circle of the solid wire 200 enters the second channel 134, and the first main body 131 and the first separating member 132 can also transfer heat to the inner core of the solid wire 200 in the first channel 133.

[0081] In one embodiment, the distance between the two first separating members 132 is consistent with the diameter of the inner core of the solid wire 200. In this way, the two first separating members 132 can effectively separate the outer circle and the inner core of the solid wire 200, so that the softened or even melted outer circle can enter the second channel 134, and the hard inner core enters the first channel 133 to be heated.

[0082] See Figure 3 , Figure 4 , Figures 6 to 8, in one embodiment, two first separating members 132 are symmetrically arranged in the first inner cavity of the first main body 131. The distances of the two first separating members 132 from the central axis of the first main body 131 are equal, and the cross-sectional areas of the two second channels 134 are ensured to be substantially the same. In this way, after the first separating members 132 separate the outer ring and the inner core of the solid wire 200, the cross-sectional shape of the inner core of the solid wire 200 is substantially uniform, so as to facilitate the uniform heating of the inner core of the solid wire 200. At the same time, it is also possible to facilitate the movement of the inner core of the solid wire 200 in the first channel 133 and reduce the movement resistance of the inner core of the solid wire 200.

[0083] See Figure 3 , Figure 4 , Figures 6 to 8 , in this embodiment, the first separating member 132 is arranged in a plate shape, that is, the first separating member 132 is a separating plate, and the separation of the outer ring and the inner core of the solid wire 200 is realized through the separating plate. In other embodiments, the first separating member 132 can also be a separating block or the like.

[0084] See Figure 3 , Figure 4 , Figures 6 to 8 , in one embodiment, the two first separating members 132 are close to each other at the end far from the preheating member 120. That is to say, the distances of the upper parts of the two first separating members 132 are substantially equal, and the distances of the lower parts of the two first separating members 132 gradually decrease from top to bottom.

[0085] It can be understood that after the inner core of the solid wire 200 is heated in the first channel 133, the upper parts of the two first separating members 132 can contact the outer ring of the inner core to heat the inner core, and the outer ring of the inner core will soften or even gradually melt. When the inner core of the solid wire 200 moves to the lower part of the first separating member 132, the first separating member 132 and the second separating member 142 will squeeze the inner core of the solid wire 200 to separate the melted part of the outer ring of the inner core to ensure the heating effect of the inner core of the solid wire 200.

[0086] See Figure 3 , Figure 4 , Figures 6 to 8 , in one embodiment, the axial length of the first separating member 132 is less than the axial length of the first main body 131. That is to say, there is a preset distance between the top of the first separating member 132 and the top of the first main body 131, and there is a preset distance between the top of the second separating member 142 and the top of the second main body 141 to provide space for the movement of the solid wire 200.

[0087] It can be understood that if the combination of the preheating component 120 and the first insertion component 130 can already meet the melting requirements of the solid wire 200, that is, the solid wire 200 can be completely melted through the first insertion component 130. At this time, no other heat transfer components are provided at the outlet of the first insertion component 130. If the inner core of the solid wire 200 has not been completely melted after passing through the first insertion component 130, at this time, at least one heat transfer component can be provided at the second outlet.

[0088] See Figure 3 and Figure 4 , in one embodiment, the melting nozzle 100 further includes a second insertion component 140 coaxially arranged with the first insertion component 130. The second insertion component 140 is arranged at the outlet of the first insertion component 130. The second insertion component 140 can re-separate the inner core of the solid wire 200 output from the first channel 133. Furthermore, the second insertion component 140 can transfer heat to the re-separated inner core of the solid wire 200 so that the inner core of the solid wire 200 can be fully melted.

[0089] Moreover, the first insertion component 130 and the second insertion component 140 are coaxially arranged. In this way, the inner core of the solid wire 200 separated by the first insertion component 130 can accurately contact the second insertion component 140, so that the second insertion component 140 can accurately re-separate the inner core of the solid wire 200, and the inner core of the solid wire 200 can be uniformly heated to ensure the heating effect.

[0090] See Figure 3 and Figure 4 , in this embodiment, the number of the first insertion component 130 and the second insertion component 140 is one each, and the structures of the first insertion component 130 and the second insertion component 140 are different. Of course, in other embodiments of the present application, the first insertion component 130 can be at least one, and the second insertion component 140 can also be at least one. For example, a combination of one first insertion component 130 and at least two second insertion components 140; or a combination of at least two first insertion components 130 and one second insertion component 140; or a combination of at least two first insertion components 130 and at least two second insertion components 140.

[0091] See Figure 3 、 Figures 9 to 12, in one embodiment, the second insertion member 140 includes a second main body 141 and a second separating member 142. The second main body 141 is disposed in the installation channel 111 and is located at the outlet of the first insertion member 130. The second separating member 142 is disposed in the middle region of the second main body 141. The second separating member 142 divides the inner cavity of the second main body 141 into a third channel 143 and a fourth channel 144. Both the third channel 143 and the fourth channel 144 communicate with the first channel 133 and the second channel 134. Figure 9 is Figure 3 the front view of the second insertion member 140 in the melting nozzle 100 shown in Figure 10 is Figure 9 the sectional view of the second insertion member 140 at C-C shown in Figure 11 is Figure 9 the top view of the second insertion member 140 shown in Figure 12 is Figure 9 the sectional view of the second insertion member 140 shown in

[0092] The second main body 141 is hollow. The hollow cavity of the second main body 141 is the second inner cavity. The second separating member 142 is disposed in the second inner cavity and is located in the middle region of the second inner cavity. The second separating member 142 is connected to the inner wall of the second main body 141. The second separating member 142 can divide the second inner cavity into a third channel 143 and a fourth channel 144. The third channel 143 and the fourth channel 144 are located on both sides of the second separating member 142, and the cross-sectional areas of the third channel 143 and the fourth channel 144 are substantially the same, and both communicate with the first channel 133 and the second channel 134.

[0093] After the second separating member 142 is disposed in the middle region of the inner cavity, the top of the second separating member 142 is aligned with the middle region of the first channel 133. In this way, after the inner core of the solid wire 200 is heated and output from the first channel 133 and enters the second insertion member 140, the second separating member 142 can directly contact the center of the inner core of the solid wire 200. During the movement of the solid wire 200, the blocking force generated by the second separating member 142 can divide the inner core of the solid wire 200 into two parts.

[0094] That is, the second separating member 142 disposed in the middle region in this embodiment can play a cutting role. The inner core of the solid wire 200 can be softened or even the outer ring starts to melt after being heated in the first channel 133. After the second separating member 142 contacts the solid wire 200, the second separating member 142 can directly cut the inner core of the solid wire 200 into two parts. In this way, the inner core of the solid wire 200 can enter the third channel 143 and the fourth channel 144 respectively.

[0095] At this time, the heat-conducting component 110 can transfer heat to the second main body 141 and the second separating member 142, so that the inner cores of the solid wires 200 in the third channel 143 and the fourth channel 144 are heated. After the second separating member 142 cuts the inner cores of the solid wires 200, the middle regions of the inner cores of the solid wires 200 can be directly heated, further increasing the heating area of the solid wires 200 and making it easier for the inner cores of the solid wires 200 to melt.

[0096] Meanwhile, the outer rings of the solid wires 200 in the second channel 134 have melted into wire melts and respectively enter the third channel 143 and the fourth channel 144, and are heated together with the inner cores of the solid wires 200 to melt into wire melts. After the solid wires 200 are further separated by the second insertion member 140, the solid wires 200 can output the wire melts from the third channel 143 and the fourth channel 144 and enter the output channel 171 of the nozzle body 170, so that the nozzle body 170 extrudes the wire melts.

[0097] See Figure 3 , in one embodiment, the second separating member 142 is located between the two first separating members 132 and is arranged parallel to the first separating members 132. In this way, the inner cores of the solid wires 200 output from the first channel 133 can directly contact the second separating member 142, so that the second separating member 142 can roughly even out the inner cores of the solid wires 200. When the inner cores of the solid wires 200 enter the third channel 143 and the fourth channel 144 respectively, it can ensure that the inner cores of the solid wires 200 are heated in the same way, avoiding the situation where all the melts in one side channel are melted while the melts in the other side channel are not completely melted due to uneven cutting.

[0098] See Figure 3 、 Figures 10 to 12 , in one embodiment, one end of the second separating member 142 facing the first insertion member 130 has a first tip 1421. That is to say, the top of the second separating member 142 is the first tip 1421, and the first tip 1421 can facilitate the separation operation of the inner cores of the solid wires 200. In this way, the second separating member 142 can cut and separate the inner cores of the solid wires 200 output from the first channel 133 through the first tip 1421.

[0099] See Figure 3 、 Figure 10 and Figure 12 , one end of the second separating member 142 away from the first insertion member 130 has a second tip 1422. That is to say, the bottom of the second separating member 142 is the second tip 1422, and the second tip 1422 can increase the space in the lower parts of the third channel 143 and the fourth channel 144, so as to reduce the flow pressure of the wire melts in the third channel 143 and the fourth channel 144 and facilitate the flow of the wire melts.

[0100] Refer to Figure 11 and Figure 12 , the second body 141 has protruding heat-conducting protrusions 1411, and the heat-conducting protrusions 1411 protrude into the third channel 143 and / or the fourth channel 144. The heat-conducting protrusions 1411 protrude from the inner walls of the third channel 143 and the fourth channel 144 to reduce the cross-sectional areas of the third channel 143 and the fourth channel 144. In this way, the surface areas of the third channel 143 and the fourth channel 144 can be increased, and the wire melt and the inner core of the solid wire 200 can be easily brought into contact with the second body 141, increasing the contact area, thereby enhancing the heat transfer effect and making it easier for the inner core of the solid wire 200 to melt.

[0101] Refer to Figure 3 , Figure 4 , Figure 6 , Figures 8 to 12 , in one embodiment, the melting nozzle 100 further includes an alignment member 150, and the alignment member 150 can achieve the alignment connection between the first insertion member 130 and the second insertion member 140. The alignment member 150 is separately provided on the first body 131 and the second body 141. After the first body 131 and the second body 141 are installed in the installation channel 111, the alignment member 150 is in alignment cooperation to ensure the stable connection between the first insertion member 130 and the second insertion member 140.

[0102] It can be understood that if one of the first insertion member 130 and the second insertion member 140 rotates, the position of the second separating member 142 relative to the first separating member 132 will change, which will affect the uniform separation of the inner core of the solid wire 200 by the second separating member 142. The alignment member 150 can circumferentially position the first insertion member 130 and the second insertion member 140, prevent one of the first insertion member 130 and the second insertion member 140 from rotating circumferentially, and enable the stable connection between the first insertion member 130 and the second insertion member 140, thereby ensuring that the second separating member 142 can uniformly separate the inner core of the solid wire 200.

[0103] Refer to Figure 3 , Figure 4 , Figure 6 , Figures 8 to 12 , in one embodiment, the alignment member 150 includes a first positioning portion 151 and a second positioning portion 152. The first positioning portion 151 is provided at one end of the first insertion member 130 facing the second insertion member 140, and the second positioning portion 152 is provided at the first section of the second insertion member 140 facing the first insertion member 130. The first positioning portion 151 and the second positioning portion 152 are in positioning cooperation.

[0104] The first positioning portion 151 is located at the bottom of the first main body 131, the second positioning portion 152 is located at the top of the second main body 141, and the first positioning portion 151 and the second positioning portion 152 are correspondingly arranged. When the first insertion member 130 and the second insertion member 140 are installed in the installation channel 111, the first positioning portion 151 and the second positioning portion 152 are in alignment and cooperation to achieve a stable connection between the first insertion member 130 and the second insertion member 140.

[0105] In this embodiment, the first positioning portion 151 is a groove, and the second positioning portion 152 is a protrusion. The stable connection of the alignment between the first insertion member 130 and the second insertion member 140 is achieved through the cooperation of the protrusion and the groove. Of course, in other embodiments of the present application, it is also possible that the first positioning portion 151 is a groove, the second positioning portion 152 is a protrusion, or the first positioning portion 151 and the second positioning portion 152 are other structural forms capable of achieving alignment and cooperation, such as snap-fits, etc.

[0106] See Figure 3 , Figures 13 to 16 , in one embodiment, the preheating member 120 further has a preheating protrusion 122 and a preheating groove 123. The preheating protrusion 122 protrudes from the inner wall of the preheating channel 121, and the preheating groove 123 is recessed in the inner wall of the preheating channel 121. Figure 13 For Figure 3 the front view of the preheating member 120 shown in Figure 14 For Figure 13 the cross-sectional view of the preheating member 120 at D-D shown in Figure 15 For Figure 13 the top view of the preheating member 120 shown in Figure 16 For Figure 13 the three-dimensional view of the preheating member 120 shown in

[0107] The preheating protrusion 122 protrudes from the inner wall of the preheating member 120 to be located in the preheating channel 121. In this way, after the solid wire 200 enters the preheating channel 121, the preheating member 120 can transfer heat to the solid wire 200. The preheating protrusion 122 can increase the contact area between the solid wire 200 and the preheating member 120, thereby increasing the heat-receiving area of the solid wire 200 and making the solid wire 200 more easily heated and softened. At the same time, the preheating protrusion 122 can also guide the movement of the solid wire 200.

[0108] Moreover, the preheating groove 123 is recessed in the inner wall of the preheating member 120 to be recessed from the preheating passage 121. The preheating groove 123 can increase the space of the preheating passage 121. In this way, after the solid wire 200 is heated in the preheating passage 121, the outer ring of the solid wire 200 will expand. At this time, the preheating groove can accommodate the expanded portion of the solid wire 200, preventing the solid wire 200 from being squeezed in the preheating passage 121 and facilitating the movement of the solid wire 200 in the preheating passage 121.

[0109] See Figure 3 , Figures 14 to 16 , in an embodiment, the number of the preheating protrusions 122 and the preheating grooves 123 are both multiple and are staggered inside the preheating member 120. The multiple preheating protrusions 122 can uniformly transfer heat to the solid wire 200, and the multiple preheating grooves 123 can uniformly accommodate the expanded portion of the solid wire 200 to prevent the solid wire 200 from moving eccentrically in the preheating passage 121.

[0110] See Figure 3 , Figure 14 and Figure 16 , in an embodiment, one end of the preheating protrusion 122 away from the first insertion member 130 has a tapered protrusion. That is to say, the top of the preheating protrusion 122 is a tapered protrusion. The protruding height of the tapered protrusion gradually increases from top to bottom, so that the tapered protrusion can play a guiding role to facilitate the solid wire 200 to enter the preheating passage 121. Moreover, there is a preset distance between the top of the tapered protrusion and the top of the preheating member 120 to prevent blocking the solid wire 200 from entering the preheating passage 121.

[0111] See Figure 3 , Figure 14 and Figure 16 , in an embodiment, the preheating groove 123 penetrates through one end of the preheating member 120 facing the first insertion member 130, and the cross-sectional dimension of the preheating groove 123 gradually increases in the direction close to the first insertion member 130. There is a certain distance between the top of the preheating groove 123 and the preheating member 120. The bottom of the preheating groove 123 penetrates through the bottom of the preheating member 120, and the cross-sectional dimension of the preheating groove 123 gradually increases from top to bottom.

[0112] It can be understood that when the solid wire 200 just enters the preheating channel 121, the solid wire 200 has not expanded yet, so there is no preheating groove 123 provided at the top of the preheating component 120. Then, the solid wire 200 gradually moves to the preheating groove 123 in the preheating channel 121. At the same time, the solid wire 200 expands after being heated, and the expanded part is located in the preheating groove 123. Moreover, as the solid wire 200 absorbs more heat, the volume of its expansion will be larger. At this time, the preheating groove 123 with an increased cross-sectional area can better accommodate the expanded solid wire 200.

[0113] See Figure 3 and Figure 14 , in an embodiment, the preheating channel 121 includes a first preheating section 1211, a tapered section 1212, and a second preheating section 1213. The tapered section 1212 connects the first preheating section 1211 and the second preheating section 1213. The diameter of the first preheating section 1211 is larger than the diameter of the second preheating section 1213.

[0114] The first preheating section 1211 is located at the top, the tapered section 1212 is located in the middle, and the second preheating section 1213 is located at the bottom. The tapered section 1212 is transitionally connected to the first preheating section 1211 and the second preheating section 1213. The tapered section 1212 has a structure with a larger top and a smaller bottom. The diameter of the first preheating section 1211 is the same as the top diameter of the tapered section 1212, and the diameter of the second preheating section 1213 is the same as the bottom diameter of the tapered section 1212.

[0115] The expanded part of the solid wire 200 is accommodated by the preheating groove 123. In this way, the other parts of the solid wire 200 can be in contact with the inner wall of the preheating channel 121. The second preheating section 1213 with a smaller diameter can facilitate the contact between the solid wire 200 and the preheating component 120, and better transfer heat to the solid wire 200 to ensure the heating effect.

[0116] Under normal circumstances, after the inner core of the solid wire 200 passes through the third channel 143 and the fourth channel 144, the inner core of the solid wire 200 can be completely melted. To avoid incomplete melting of the inner core of the solid wire 200 or further heating of the already melted melt, see Figure 3 , this application also provides a melting component 160 at the outlet of the second insertion component 140. The melting component 160 further transfers heat to the wire melt output by the second insertion component 140, so that the wire melt is further heated to form a molten state.

[0117] See Figure 3 、 Figures 17 to 19, in one embodiment, the melting nozzle 100 further includes a melting component 160. The melting component 160 is located at one end of the first insertion component 130 away from the preheating component 120. The melting component 160 has a melting channel 163, and the melting channel 163 communicates with the first channel 133 and the second channel 134. Figure 17 is Figure 3 the front view of the melting component 160 described above, Figure 18 is Figure 17 the perspective view of the melting component 160 shown in the figure, Figure 19 is Figure 17 the top view of the melting component 160 shown in the figure.

[0118] The melting component 160 is disposed at the bottom of the second insertion component 140. The melting component 160 is hollowly arranged, and its hollow inner cavity is the melting channel 163. The melting channel 163 can communicate with the third channel 143 and the fourth channel 144 of the second insertion component 140. The third channel 143 and the fourth channel 144 output the wire melt, or output a mixture of the wire melt and a small part of the un-melted inner core, and can enter the melting channel 163.

[0119] The heat conducting component 110 can transfer heat to the melting component 160. The melting component 160 can further transfer heat to the wire melt or the mixture therein, so that the wire melt or the mixture can be fully heated and melted to form a molten wire melt. The melting channel 163 transports the wire melt to the output channel 171 of the nozzle body 170, and the wire melt is extruded through the nozzle body 170 for 3D printing operations.

[0120] See Figure 3 、 Figures 17 to 19 , in one embodiment, the melting component 160 includes a melting main body 161 and support ribs 162. The support ribs 162 are axially arranged in the melting main body 161 to form a plurality of melting channels 163 in the melting main body 161. The melting main body 161 is the main body housing of the melting component 160. The melting main body 161 is hollowly arranged, and its hollow inner cavity is the melting channel 163. The melting main body 161 is installed in the installation channel 111. The heat conducting component 110 can transfer heat to the melting main body 161, and transfer heat to the wire melt or the mixture output by the second insertion component 140 through the melting main body 161.

[0121] The support ribs 162 are disposed in the melting body 161 and connected to the inner wall of the melting body 161. Moreover, the support ribs 162 extend axially, and the support ribs 162 can divide the inner cavity of the melting body 161 into a plurality of melting channels 163. In this way, the wire melt or mixture output by the second insertion member 140 can enter each of the melting channels 163 respectively, and the melting body 161 and the support ribs 162 can conduct heat to the wire melt or mixture in the melting channels 163, so that the wire melt or mixture can be fully heated and melted to form a molten wire melt. Optionally, the support ribs 162 are in a shape of a cross or a grid, etc., to divide the inner cavity of the melting body 161 to form a plurality of melting channels 163.

[0122] See Figure 3 、 Figures 17 to 19 In one embodiment, the melting member 160 further includes a support ring 164. The support ring 164 is disposed in the melting body 161. The support ribs 162 include a first rib 1621 and a second rib 1622. The first rib 1621 is disposed in the support ring 164 and encloses a plurality of first flow channels 1631 with the support ring 164. The second rib 1622 is disposed between the melting body 161 and the support ring 164 and supports and connects the melting body 161 and the support ring 164. The second rib 1622, the support ring 164 and the melting body 161 enclose a plurality of second flow channels 1632; the first flow channels 1631 and the second flow channels 1632 communicate with the first channel 133 and the second channel 134.

[0123] The support ring 164 is disposed in the melting body 161, dividing the inner cavity of the melting body 161 into an inner ring and an outer ring. The first rib 1621 is located inside the support ring 164 and connected to the inner wall of the support ring 164. The inner cavity of the support ring 164 is supported by the first support rib 162, and the inner cavity of the support ring 164 is divided into a plurality of first flow channels 1631. The second rib 1622 is disposed between the melting body 161 and the support ring 164, that is, the second rib 1622 is located outside the support ring 164 to support and connect the inner wall of the melting body 161 and the outer wall of the support ring 164. The second rib 1622 can divide the space between the melting body 161 and the support ring 164 into a plurality of second flow channels 1632.

[0124] The top of the first runner 1631 is connected to the third channel 143 and the fourth channel 144 of the second insertion member 140, and the bottom of the first runner 1631 and the second runner 1632 is connected to the output channel 171 of the nozzle body 170. The wire melt or mixture output through the third channel 143 and the fourth channel 144 of the second insertion member 140 can enter the respective first runner 1631 and the second runner 1632. The melting body 161, the support ring 164, the first rib 1621 and the second rib 1622 can conduct heat to the wire melt or mixture in the first runner 1631 and the second runner 1632, so that the wire melt or mixture can be fully heated and melted.

[0125] In this way, the melting component 160 can uniformly transfer heat to the wire melt or mixture through the first runner 1631 and the second runner 1632 with a small cross-section, so that the wire melt or mixture in the first runner 1631 and the second runner 1632 can stably reach the molten state and then be extruded from the nozzle body 170.

[0126] See Figure 18 and Figure 19 , in one embodiment, the number of the first ribs 1621 is multiple, and the multiple first ribs 1621 are arranged in a cross shape. The number of the second ribs 1622 is multiple, and the second ribs 1622 are arranged in a straight line and are spaced around the circumferential side of the support ring 164. Of course, in other embodiments, the first ribs 1621 and the second ribs 1622 can also be in a grid shape or other regular or irregular shapes.

[0127] See Figure 18 and Figure 19 , in one embodiment, the first rib 1621 and the second rib 1622 are arranged staggeredly in the circumferential direction. That is to say, the first rib 1621 and the second rib 1622 are not collinear. In this way, the heat transfer path can be increased, so as to increase the heat dissipation area and better transfer heat to the wire melt or mixture in the first runner 1631 and the second runner 1632.

[0128] See Figure 18 , in one embodiment, the first rib 1621, the second rib 1622 and the support ring 164 extend axially. In this way, the wire melt or mixture can flow in the corresponding runner during heat transfer, while ensuring the heating area, it can also avoid mixed flow and reduce the flow resistance.

[0129] See Figure 3 and Figure 4, in one embodiment, one end of the melting body 161 away from the first insertion member 130 has a receiving cavity 1611. That is to say, the bottom of the melting body 161 has a receiving cavity 1611. The top of the receiving cavity 1611 communicates with each first flow channel 1631 and the second flow channel 1632, and the bottom of the receiving cavity 1611 communicates with the output channel 171. The wire melts output from the first flow channel 1631 and the second flow channel 1632 are stored in the receiving cavity 1611 and enter the output channel 171 through the receiving cavity 1611.

[0130] In one embodiment, the cross-sectional shape of the preheating member 120, the cross-sectional shape of the first main body 131, the cross-sectional shape of the second main body 141, and the cross-sectional shape of the melting body 161 are adapted to the cross-sectional shape of the installation channel 111 for easy installation. Exemplarily, the cross-sectional shape of the installation channel 111 is circular. Correspondingly, the preheating member 120, the first main body 131, the second main body 141, and the melting body 161 are all cylinders for easy processing. Of course, in other embodiments of the present application, the above cross-sectional shape can also be a regular polygon, etc.

[0131] In one embodiment, the heat conducting member 110 is made of a material with a high heat conduction coefficient. The heat conducting member 110 can transfer the heat of the heating element to the preheating member 120 and the first insertion member 130. Furthermore, the preheating member 120 and the first insertion member 130 can transfer heat to the solid wire 200, causing the solid wire 200 to be heated and melted. Optionally, the heat conducting member 110 is made of materials such as copper or aluminum. Of course, the preheating member 120, the first insertion member 130, the second insertion member 140, and the melting member 160 are also made of materials with a high heat conduction coefficient.

[0132] See Figure 3 and Figure 4 , in this embodiment, the melting nozzle 100 sequentially arranges the preheating member 120, the first insertion member 130, the second insertion member 140, and the melting member 160 in the installation channel 111 of the heat conducting member 110, and the nozzle body 170 is arranged at the bottom of the heat conducting member 110. The preheating channel 121, the first channel 133 and the second channel 134, the third channel 143 and the fourth channel 144, the first flow channel 1631 and the second flow channel 1632 are sequentially communicated from top to bottom, and finally communicated to the output channel 171 of the nozzle body 170.

[0133] After the solid wire 200 enters the preheating channel 121, the preheating component 120 can transfer the heat of the heat-conducting component 110 to the solid wire 200 to preheat the solid wire 200, soften the outer ring of the solid wire 200 and make it enter the preheating tank 123. Then, the solid wire 200 enters the first insertion component 130, and the two first separating parts 132 separate the outer ring and the inner core of the solid wire 200. The outer ring of the solid wire 200 enters the second channels 134 on both sides, and the inner core of the solid wire 200 enters the first channel 133. Moreover, the first main body 131 and the first separating part 132 can transfer heat to the outer ring of the solid wire 200 in the second channels 134, and the first main body 131 and the first separating part 132 can also transfer heat to the inner core of the solid wire 200 in the first channel 133, so that the outer ring and the inner core of the solid wire 200 are heated separately.

[0134] The inner core of the solid wire 200 output in the first channel 133 is heated and softened or even gradually melted, and the inner core of the solid wire 200 enters the second insertion component 140. The second separating part 142 can separate the inner core of the solid wire 200, separate the inner core of the solid wire 200 into two parts, and enter the third channel 143 and the fourth channel 144 respectively. At the same time, the wire melt after the outer ring of the solid wire 200 melts output by the second channel 134 can also enter the third channel 143 and the fourth channel 144. Meanwhile, the first insertion component 130 and the second insertion component 140 are connected in alignment through the alignment component 150 to stably connect the first insertion component 130 and the second insertion component 140.

[0135] The second main body 141 and the second separating part 142 can transfer heat to the wire melt and the inner core of the solid wire 200 in the third channel 143 and the fourth channel 144 respectively, so that the inner core of the solid wire 200 gradually melts. If the wire melt is completely melted or a small part of the inner core has not melted yet, at this time, the wire melt or the mixture output by the third channel 143 and the fourth channel 144 enters the respective first flow channels 1631 and second flow channels 1632 of the melting component 160. The melting main body 161, the support ring 164, the first rib 1621 and the second rib 1622 transfer heat to the wire melt or the mixture in the first flow channel 1631 and the second flow channel 1632 respectively to ensure that the wire melt can reach the molten state stably, and then the wire melt in the molten state can enter the output channel 171 of the nozzle main body 170.

[0136] See Figure 3 and Figure 4, in this application, a preheating component 120 is arranged in the installation channel 111 of the heat-conducting component 110 for preheating. Then, through the first insertion component 130, the second insertion component 140, and the melting component 160, heat is transferred to and separated from the solid wire 200 step by step, increasing the contact area between the solid wire 200 and the heat source, thereby increasing the heat-receiving area of the solid wire 200. Furthermore, the solid wire 200 can be fully melted and reach a molten state, and finally flow to the nozzle body 170. The nozzle body 170 extrudes the wire melt to perform a 3D printing operation.

[0137] In other embodiments of this application, in the installation channel 111 of the heat-conducting component 110 of the melting nozzle 100, the preheating component 120, the first insertion component 130, and the melting component 160 are arranged in sequence, or the preheating component 120, the second insertion component 140, and the melting component 160 are arranged in sequence; or the preheating component 120, the first insertion component 130, and the second insertion component 140 are arranged in sequence, etc. The principle is essentially the same as that of the above embodiments and will not be elaborated here. Moreover, the number of the first insertion component 130 and the second insertion component 140 in each layout can also be adjusted.

[0138] See Figures 1 to 4 , this application also provides a 3D printer, including a throat structure 300 and the melting nozzle 100 in any of the above embodiments. The throat structure 300 is arranged on the melting nozzle 100. The throat structure 300 is arranged on the top of the melting nozzle 100 to guide the solid wire 200 into the preheating channel 121.

[0139] After the 3D printer of this application adopts the melting nozzle 100 of the above embodiments, it can increase the heat-receiving area of the solid wire 200, enable the solid wire 200 to be quickly melted, avoid nozzle blockage, improve the extrusion rate of the melting nozzle 100, so as to improve the printing efficiency and ensure the printing quality.

[0140] See Figures 1 to 4 , in one embodiment, the throat structure 300 includes a connecting piece 310 and a throat 320. The connecting piece 310 is in a hollow structural form. The throat 320 is arranged in the connecting piece 310 and extends axially out of the connecting piece 310. And the connecting piece 310 is arranged on the top of the heat-conducting component 110. The throat 320 can be docked with the propulsion mechanism of the solid wire 200 to convey the solid wire 200 through the throat 320 into the preheating channel 121 of the preheating component 120.

[0141] See Figures 1 to 4, in one embodiment, the throat structure 300 further includes a heat dissipation member 330. The heat dissipation member 330 is disposed outside the throat 320 and has a predetermined distance from the connecting member 310. The heat dissipation member 330 can play a role in heat dissipation. After the heat conducting component 110 transfers heat to the solid wire 200, due to the effect of heat conduction, the connecting member 310 and the throat 320 will also be heated. At this time, the heat dissipation member 330 can dissipate the heat of the throat 320, minimizing the heat received by the solid wire 200 in the throat 320, thereby avoiding the situation where the solid wire 200 melts in the throat 320 and blocks the throat 320.

[0142] Meanwhile, there is a certain distance between the heat dissipation member 330 and the connecting member 310 in the axial direction, so that the connecting member 310 will not directly conduct heat to the heat dissipation member 330. It should be noted that the structural form of the heat dissipation member 330 is not restricted in principle as long as heat dissipation can be achieved. For example, it can be set as fins and used in combination with a fan, etc.

[0143] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0144] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A melting nozzle, characterized in that, Comprising: A heat-conducting component having an installation channel penetrating axially therethrough; A preheating component disposed in the installation channel, the preheating component having a preheating channel penetrating axially therethrough; And A first insertion component including a first main body and a first separating member, the first main body being disposed in the installation channel and located at the outlet of the preheating component, the first separating member being axially disposed in the first main body, the first separating member dividing the inner cavity of the first main body into a first channel and a second channel, and both the first channel and the second channel communicating with the preheating channel.

2. The melting nozzle according to claim 1, wherein There is at least one first separating member, the first separating member being disposed in the axial direction of the first main body and enclosing the first channel and the second channel with the first main body; And / or, there are two first separating members, the two first separating members being spaced apart in the first main body, the two first separating members enclosing the first channel, and each first separating member enclosing the second channel with the inner wall of the first main body; The first separating members approach each other at the end far from the preheating component, and / or, the axial length of the first separating member is less than the axial length of the first main body.

3. The melt nozzle according to claim 1, characterized in that, The melting nozzle further includes a second insertion component coaxially disposed with the first insertion component; The second insertion component includes a second main body and a second separating member, the second main body being disposed in the installation channel and located at the outlet of the first insertion component, the second separating member being disposed in the middle region of the second main body, the second separating member dividing the inner cavity of the second main body into a third channel and a fourth channel, and both the third channel and the fourth channel communicating with the first channel and the second channel.

4. The melting nozzle according to claim 3, characterized in that One end of the second separating member facing the first insertion component has a first tip, and the end of the second separating member far from the first insertion component has a second tip; And / or, the second main body has a protruding heat-conducting protrusion, the heat-conducting protrusion protruding into the third channel and / or the fourth channel.

5. The melting nozzle according to claim 3, characterized in that, The melting nozzle further includes an alignment component, the alignment component including a first positioning portion and a second positioning portion, the first positioning portion being disposed at one end of the first insertion component facing the second insertion component, the second positioning portion being disposed at the first section of the second insertion component facing the first insertion component, and the first positioning portion and the second positioning portion being in positioning cooperation.

6. The melting nozzle according to any one of claims 1 to 5, characterized in that, The preheating component further has a preheating protrusion and a preheating groove, the preheating protrusion protruding from the inner wall of the preheating channel, and the preheating groove being recessed in the inner wall of the preheating channel; One end of the preheating protrusion far from the first insertion component has a tapered protrusion, and / or, the preheating groove penetrates through one end of the preheating component facing the first insertion component, and the cross-sectional dimension of the preheating groove gradually increases in the direction close to the first insertion component.

7. The melting nozzle according to any one of claims 1 to 5, characterized in that The melting nozzle further includes a melting component, the melting component being located at one end of the first insertion component far from the preheating component, the melting component having a melting channel, and the melting channel communicating with the first channel and the second channel; The melting component includes a melting body and support ribs, and the support ribs are axially arranged in the melting body to form a plurality of the melting channels in the melting body.

8. The melting nozzle according to claim 7, wherein, The melting component further includes a support ring, the support ring is arranged in the melting body, the support ribs include a first rib and a second rib, the first rib is arranged in the support ring and encloses a plurality of first flow channels with the support ring, the second rib is arranged between the melting body and the support ring and supports and connects the melting body and the support ring, and the second rib, the support ring and the melting body enclose a plurality of second flow channels; the first flow channels and the second flow channels communicate with the first channel and the second channel; The first rib and the second rib are arranged staggeredly in the circumferential direction; and / or, one end of the melting body away from the first insertion component has a receiving cavity.

9. A 3D printer, characterized in that, It includes a throat structure and the melting nozzle according to any one of claims 1 to 8, and the throat structure is arranged on the melting nozzle.

10. The 3D printer according to claim 9, characterized in that, The melting nozzle further has a nozzle body, the nozzle body has an output channel, the nozzle body is arranged at one end of the heat-conducting component of the melting nozzle, and the output channel communicates with the first channel and the second channel in the melting nozzle.

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