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, the heat conduction part is provided with a conveying channel, the conveying channel penetrates through the two axial ends of the heat conduction part, the conveying channel comprises a plurality of connecting channels which are sequentially communicated, and every two adjacent connecting channels face opposite directions in the axial direction of the heat conduction part; the stripping part is arranged in the conveying channel, the stripping part is provided with a first channel penetrating in the axial direction of the heat conduction part, and a second channel is defined by the outer wall of the stripping part and the inner wall of the conveying channel; the first channel and the second channel are both communicated with the conveying channel. The heating area of the solid wire and the conveying channel is increased through the connecting channels facing the opposite directions, meanwhile, the heat conduction distance between the inner core and the heat conduction component is reduced through the stripping component, the heat conduction component can conduct heat transfer on the inner core more quickly, the melting efficiency is improved, the extrusion rate of the melting nozzle is increased, and the printing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing devices, and particularly 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 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 quickly melted, resulting in nozzle blockage, low printing efficiency, and affecting the printing quality. Utility Model Content

[0004] Based on this, in view of the problem that the inner core of the current solid wire is far from the heat source, affecting the heating efficiency and printing efficiency, it is necessary to provide a melting nozzle and a 3D printer, which can increase the heat receiving 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 includes:

[0006] A heat conducting member, the heat conducting member has a conveying channel, the conveying channel penetrates to the axial two ends of the heat conducting member, the conveying channel includes a plurality of sequentially connected connecting channels, and along the axis of the heat conducting member, the orientations of two adjacent connecting channels are opposite; and

[0007] A peeling member, disposed in the conveying channel, the peeling member has a first channel penetrating along the axis of the heat conducting member, and the outer wall of the peeling member and the inner wall of the conveying channel enclose a second channel;

[0008] Wherein, the first channel and the second channel both communicate with the conveying channel.

[0009] In an embodiment of the present application, the connecting channel is arc-shaped, so that the conveying channel is a curved channel;

[0010] Alternatively, the connecting channel is linearly arranged, so that the conveying channel is a zigzag channel.

[0011] In an embodiment of the present application, the conveying channel is coaxially arranged with the first channel;

[0012] And / or, the first channel includes a conical section and a straight channel, and the conical section is arranged at the entrance of the straight channel.

[0013] In an embodiment of the present application, the conveying channel has an inlet end and an outlet end along the axial direction of the heat conducting component, the peeling component is arranged near the outlet end, and there is a preset distance from the outlet end.

[0014] In an embodiment of the present application, the peeling component includes a diversion block and a support rib, the diversion block is arranged in the conveying channel, the diversion block has the first channel, and the inner wall of the conveying channel is enclosed with the diversion block to form the second channel;

[0015] The support rib is arranged on the outer wall of the diversion block to support and connect the inner wall of the conveying channel and the outer wall of the diversion block.

[0016] In an embodiment of the present application, the number of the support ribs is multiple, and the multiple support ribs are arranged at intervals along the circumferential direction of the diversion block;

[0017] And / or, the axial length of the support rib along the heat conducting component is less than the axial length of the diversion block along the heat conducting component.

[0018] In an embodiment of the present application, the diversion block is in an ellipsoidal shape, and the shape of the second channel is adapted to the outer contour shape of the diversion block.

[0019] In an embodiment of the present application, the axial length of the diversion block along the heat conducting component is 1 / 3 to 1 / 5 of the axial length of the conveying channel along the heat conducting component.

[0020] In an embodiment of the present application, 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, and the output channel is communicated with the conveying channel.

[0021] A 3D printer includes a throat structure and the melting nozzle as described in any one of the above technical features, and the throat structure is arranged at the inlet end of the melting nozzle.

[0022] After adopting the above technical solution, the present application has at least the following technical effects:

[0023] The melting nozzle and 3D printer of the present application. In the melting nozzle, the heat-conducting component forms a conveying channel by using a plurality of connected connecting channels. Along the axial direction of the heat-conducting component, two adjacent connecting channels face in opposite directions. When the solid wire enters the conveying channel, the solid wire can sequentially contact the connecting channels facing in opposite directions, increasing the heat-receiving area of the solid wire and the conveying channel, and improving the heat transfer effect of the heat-conducting component on the solid wire. Moreover, after the outer circle of the solid wire is heated and melted, the solid wire can abut against the peeling component, and the peeling component can separate the outer circle and the inner core of the solid wire. The melted outer circle enters the second channel to continue being heated and melted, and the inner core continues to be heated and melted in the first channel. The wire melt formed by the melted outer circle in the second channel and the melted inner core in the first channel can be extruded by the melting nozzle.

[0024] In this melting nozzle, the heat-receiving area of the solid wire and the conveying channel is increased through the connecting channels facing in opposite directions. At the same time, the melted outer circle of the solid wire is separated by the peeling component, reducing the moving resistance of the solid wire in the conveying channel and the heat-conducting distance between the inner core and the heat-conducting component, enabling the heat-conducting component to transfer heat to the inner core faster. In this way, the solid wire can be quickly melted after being heated, improving the melting efficiency, avoiding nozzle blockage, increasing the extrusion rate of the melting nozzle, thereby improving the printing efficiency and ensuring the printing quality. Description of the Drawings

[0025] Figure 1 Is a perspective view of the melting nozzle in an embodiment of the present application.

[0026] Figure 2 Is Figure 1 The front view of the melting nozzle shown in the figure.

[0027] Figure 3 Is Figure 2 The sectional view of the melting nozzle shown in the figure at A-A.

[0028] Figure 4 Is Figure 3 The schematic diagram of the solid wire entering the melting nozzle shown in the figure.

[0029] Figure 5 Is Figure 2 The front view of the heat-conducting component in the melting nozzle shown in the figure.

[0030] Figure 6 Is Figure 5 The sectional view of the heat-conducting component shown in the figure at B-B.

[0031] Figure 7 Is Figure 2 The side view of the melting nozzle shown in the figure.

[0032] Figure 8 Is Figure 7Cross-sectional view of the shown melting nozzle at C-C.

[0033] Figure 9 is Figure 5 Cross-sectional view of the shown melting nozzle at D-D.

[0034] Figure 10 is Figure 8 Partially enlarged view of the shown melting nozzle at E.

[0035] Wherein: 10, melting nozzle; 100, heat-conducting component; 110, conveying channel; 111, connecting channel; 112, inlet end; 113, outlet end; 200, peeling component; 210, first channel; 211, tapered section; 212, straight channel; 220, second channel; 230, flow guiding block; 240, support rib; 300, nozzle body; 310, output channel; 40, solid wire; 50, throat structure; 501, connecting piece; 502, throat; 503, heat dissipation piece. Specific embodiments

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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.

[0037] 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 drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0038] In addition, if terms such as "first" and "second" appear, these terms are only used 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 defined.

[0039] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", 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 it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In this application, unless otherwise clearly specified and defined, 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 mean 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 mean 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.

[0041] 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.

[0042] 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, the whole contacts the heat source, 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.

[0043] See Figures 1 to 3 , for this reason, this application provides a melting nozzle 10. Figure 1 is a perspective view of the melting nozzle 10 in an embodiment of this application, Figure 2 is Figure 1 the front view of the melting nozzle 10 shown in Figure 3 is Figure 2Cross-sectional view of the melting nozzle 10 shown at A-A. The melting nozzle 10 is mainly applied to a 3D printer. After the solid wire 40 is conveyed to the melting nozzle 10, the melting nozzle 10 can transfer heat to the solid wire 40 to heat and melt the solid wire 40, and extrude the wire melt to achieve 3D printing operations. Of course, in other embodiments of the present application, the melting nozzle 10 can also be applied to devices such as thermal spraying that require the use of the melting nozzle 10.

[0044] In this application, only the case where the melting nozzle 10 is applied to a 3D printer is taken as an example for illustration. The melting nozzle 10 can increase the heating area of the solid wire 40. At the same time, it can also separate the outer ring and the inner core of the solid wire 40, realizing separate heating of the outer ring and the inner core, enabling the inner core to be heated faster, thereby enabling the solid wire 40 to melt quickly, improving the melting efficiency, avoiding nozzle blockage, increasing the extrusion rate of the melting nozzle 10, and ensuring the printing quality and printing speed.

[0045] The following introduces the specific structure of the melting nozzle 10 in an embodiment.

[0046] See Figures 1 to 6 , in an embodiment, the melting nozzle 10 includes a heat-conducting component 100 and a peeling component 200. The heat-conducting component 100 has a conveying channel 110 that penetrates through both axial ends of the heat-conducting component 100. The conveying channel 110 includes a plurality of sequentially connected connecting channels 111. Along the axis of the heat-conducting component 100, the orientations of two adjacent connecting channels 111 are opposite. The peeling component 200 is disposed in the conveying channel 110. The peeling component 200 has a first channel 210 that penetrates axially along the heat-conducting component 100. The outer wall of the peeling component 200 and the inner wall of the conveying channel 110 enclose a second channel 220. Among them, both the first channel 210 and the second channel 220 communicate with the conveying channel 110. Figure 4 For Figure 3 the schematic diagram of the solid wire 40 entering the melting nozzle 10 shown, Figure 5 For Figure 2 the front view of the heat-conducting component 100 in the melting nozzle 10 shown, Figure 6 For Figure 5 the cross-sectional view of the heat-conducting component 100 shown at B-B.

[0047] The heat-conducting component 100 can achieve heat conduction. The heat-conducting component 100 is hollow, and the hollow channel of the heat-conducting component 100 is the conveying channel 110. The conveying channel 110 is used for conveying the solid wire 40, and the conveying channel 110 penetrates through both axial ends of the heat-conducting component 100. After the solid wire 40 enters the conveying channel 110 from one axial end of the heat-conducting component 100, the solid wire 40 can contact the inner wall of the conveying channel 110, and the heat-conducting component 100 conducts heat to the solid wire 40 in the conveying channel 110 to melt the solid wire 40. Then, the wire melt formed after melting the solid wire 40 is extruded from the other end of the heat-conducting component 100, and then the wire melt is extruded through the melting nozzle 10 to realize the 3D printing operation.

[0048] It should be noted that in this application, the axial direction of the heat-conducting component 100 is the height direction of the heat-conducting component 100. As Figures 2 to 6 shown, the connection direction between the top and the bottom of the heat-conducting component 100 is the axial direction of the heat-conducting component 100. The circumferential direction of the heat-conducting component 100 is the circumferential direction of the heat-conducting component 100. This axial direction and circumferential direction are also applicable to other components, which will not be elaborated later.

[0049] When the solid wire 40 passes through the conveying channel 110, one end of the solid wire 40 first enters the conveying channel 110 and gradually moves in the conveying channel 110. Moreover, the outer circle of the solid wire 40 can contact the inner wall of the conveying channel 110. During the movement of the solid wire 40 in the conveying channel 110, the heat-conducting component 100 can conduct heat to the outer circle of the solid wire 40, and the outer circle gradually melts after absorbing heat. The solid wire 40 continues to move in the conveying channel 110, and the heat-conducting component 100 continuously conducts heat to the solid wire 40 to continuously melt the solid wire 40 to form a wire melt, which is extruded through the melting nozzle 10.

[0050] Moreover, the conveying channel 110 includes a plurality of connecting channels 111, and the plurality of connecting channels 111 are sequentially connected along the moving direction of the solid wire 40, and the two adjacent connecting channels 111 are opposite in the axial direction of the heat-conducting component 100. As Figure 3 、 Figure 4 and Figure 6 shown, the previous connecting channel 111 faces left, and the next connecting channel 111 faces right. In this way, the inner wall on the left side of the previous connecting channel 111 protrudes into the conveying channel 110, and the inner wall on the right side is recessed from the conveying channel 110. The inner wall on the right side of the next connecting channel 111 is recessed from the conveying channel 110, and the inner wall on the left side protrudes into the conveying channel 110.

[0051] In this way, the connecting channels 111 with opposite directions can increase the length of the conveying channel 110, that is, the length of the conveying channel 110 is greater than the axial length of the heat-conducting component 100. As Figure 3 、Figure 4 and Figure 6 As shown in Figure 6 , after the solid wire 40 enters the conveying channel 110, the heat-conducting component 100 conducts heat to the solid wire 40. The solid wire 40 is deformed by heat to adapt to the shape of the conveying channel 110, increasing the contact area between the solid wire 40 and the conveying channel 110, and further increasing the heat transfer area between the solid wire 40 and the heat-conducting component 100.

[0052] In this way, during the movement of the solid wire 40 in the conveying channel 110, the outer ring of the solid wire 40 can gradually melt or even has melted after being heated. After increasing the contact area between the solid wire 40 and the conveying channel 110, the heat-conducting component 100 can conduct more heat to the solid wire 40. Then, the inner core of the solid wire 40 gradually softens or even is close to melting, so as to improve the heat transfer efficiency of the heat-conducting component 100 to the solid wire 40 and ensure the heating effect of the solid wire 40.

[0053] After the solid wire 40 absorbs heat and softens from the outside to the inside, in order to ensure that the melting nozzle 10 can output the wire melt and avoid the situation that the inner core of the solid wire 40 is not melted, the present application further provides a peeling component 200 in the conveying channel 110. After the solid wire 40 absorbs heat in the conveying channel 110 and reaches the position of the peeling component 200, the peeling component 200 can separate the outer ring and the inner core of the solid wire 40, and the heat-conducting component 100 can conduct heat to the outer ring and the inner core respectively, realizing the separate heating of the outer ring and the inner core, increasing the heating area, so that the solid wire 40 can be fully melted.

[0054] The peeling component 200 is arranged in the conveying channel 110. The peeling component 200 has a first channel 210 penetrating axially. The outer wall of the peeling component 200 and the inner wall of the conveying channel 110 enclose an annular second channel 220. Both the first channel 210 and the second channel 220 are communicated with the conveying channel 110. After the solid wire 40 absorbs heat in the conveying channel 110, the outer ring of the solid wire 40 melts. When the solid wire 40 contacts the peeling component 200, the peeling component 200 can separate the melted outer ring and the non-melted inner core of the solid wire 40.

[0055] At this time, the melted outer ring of the solid wire 40 enters the second channel 220, and the heat-conducting component 100 can continue to conduct heat to the melted outer ring in the second channel 220. At the same time, the inner core of the solid wire 40 enters the first channel 210, and the heat-conducting component 100 can conduct heat to the peeling component 200, and the heat is conducted to the inner core of the solid wire 40 in the first channel 210 through the peeling component 200.

[0056] The heat-conducting component 100 can directly conduct heat to the inner core of the solid wire 40 through the peeling component 200, reducing the distance between the inner core and the heat-conducting component 100. The peeling component 200 can directly transfer heat to the inner core of the solid wire 40, enabling the inner core of the solid wire 40 to be directly heated, and then enabling the solid wire 40 to melt quickly, avoiding the blockage of the melting nozzle 10 and ensuring the printing quality.

[0057] Moreover, the outer ring and the inner core of the solid wire 40 are heated separately, increasing the contact area between the solid wire 40 and the heat-conducting component 100, and then increasing the heat-receiving area of the solid wire 40 to improve the melting efficiency of the solid wire 40, enabling the solid wire 40 to melt sufficiently. The wire melt generated after the solid wire 40 melts can meet the requirements of the extrusion rate of the melting nozzle 10 to improve the printing efficiency.

[0058] Meanwhile, the outer ring of the solid wire 40 moves in the second channel 220, and the inner core of the solid wire 40 moves in the first channel 210. At this time, the melted outer ring of the solid wire 40 will not generate resistance to the movement of the inner core of the solid wire 40. The inner core of the solid wire 40 melts quickly in the first channel 210 to reduce the movement resistance of the solid wire 40 in the conveying channel 110, facilitating the conveying of the solid wire 40.

[0059] When the melting nozzle 10 is working, the solid wire 40 enters the conveying channel 110 from the top of the heat-conducting component 100 and moves in the conveying channel 110. During this process, the heat-conducting component 100 can conduct heat to the solid wire 40. The outer ring of the solid wire 40 gradually melts due to contact with the inner wall of the conveying channel 110. When the solid wire 40 moves to the peeling component 200 in the conveying channel 110, the peeling component 200 separates the outer ring and the inner core of the solid wire 40. The outer ring of the solid wire 40 enters the second channel 220, and the inner core of the solid wire 40 enters the first channel 210. Moreover, the inner core of the solid wire 40 is heated and melted in the first channel 210, and the outer ring of the solid wire 40 will also continue to be heated in the second channel 220. In this way, the solid wire 40 can be completely melted after being heated and can output wire melt from the bottom of the heat-conducting component 100, enabling the melting nozzle 10 to extrude wire melt for 3D printing operations.

[0060] The melting nozzle 10 of the above embodiments increases the heat-receiving area of the solid wire 40 and the conveying channel 110 by means of the connecting channels 111 facing opposite directions. At the same time, the outer melted ring of the solid wire 40 is separated by the peeling member 200, reducing the moving resistance of the solid wire 40 in the conveying channel 110 and shortening the heat-conduction distance between the inner core and the heat-conducting member 100, enabling the heat-conducting member 100 to transfer heat to the inner core more quickly. In this way, the solid wire 40 can be melted rapidly after being heated, improving the melting efficiency, avoiding nozzle blockage, increasing the extrusion rate of the melting nozzle 10, thus enhancing the printing efficiency and ensuring the printing quality.

[0061] Referring to Figures 1 to 4 , in one embodiment, the melting nozzle 10 further has a nozzle body 300 which has an output channel 310. The nozzle body 300 is disposed at one end of the heat-conducting member 100, and the output channel 310 is in communication with the conveying channel 110. The nozzle body 300 is disposed at the bottom of the heat-conducting member 100. The output channel 310 in the nozzle body 300 is axially through, and the output channel 310 is in communication with the conveying channel 110.

[0062] The solid wire 40 enters the conveying channel 110 from the end of the heat-conducting member 100 remote from the nozzle body 300, i.e., from the top of the heat-conducting member 100, and moves in the conveying channel 110. During this process, the heat-conducting member 100 conducts heat to the solid wire 40, and after separating the outer ring and the inner core of the solid wire 40 by the peeling member 200, the solid wire 40 is completely melted. In this way, the bottom of the heat-conducting member 100 can convey the wire melt to the output channel 310 of the nozzle body 300, and the nozzle body 300 extrudes the wire melt through the output channel 310 for 3D printing operations.

[0063] It should be noted that the 3D printer has a propulsion mechanism (not shown) for the solid wire 40, which provides a propulsion force to push the solid wire 40 into the conveying channel 110. Moreover, there is also a certain resistance when the solid wire 40 melts and moves in the conveying channel 110. The propulsion force provided by the propulsion mechanism enables the solid wire 40 to move in the conveying channel 110, and this propulsion force can also prevent the wire melt from blocking in the conveying channel 110, the first channel 210 and the second channel 220, facilitating the extrusion of the wire melt by the nozzle body 300.

[0064] In one embodiment, the melting nozzle 10 further includes a heating element (not shown), which surrounds the peripheral side of the heat-conducting component 100 to heat the heat-conducting component 100. When the heating element works, it can generate heat, and this heat can be transferred to the heat-conducting component 100, and then through the heat-conducting component 100, the heat is conducted to the solid wire 40 in the conveying channel 110 to heat the solid wire 40. 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 capable of generating heat.

[0065] In one embodiment, the heat-conducting component 100 is made of a material with a high thermal conductivity. When the solid wire 40 moves in the conveying channel 110, the heat-conducting component 100 can transfer the heat of the heating element to the solid wire 40 to transfer heat to the solid wire 40, so that the solid wire 40 is heated and melted. Optionally, the heat-conducting component 100 is made of materials such as copper or aluminum.

[0066] See Figure 3 , Figure 4 and Figure 6 , in one embodiment, the conveying channel 110 has an inlet end 112 and an outlet end 113 along the axial direction of the heat-conducting component 100. The inlet end 112 is located at the top of the conveying channel 110, and the outlet end 113 is located at the bottom of the conveying channel 110. The solid wire 40 enters the conveying channel 110 from the inlet end 112. After being heated in the conveying channel 110, the wire melt is output from the outlet end 113 into the output channel 310 of the nozzle body 300.

[0067] See Figure 3 , Figure 4 and Figure 6 , in one embodiment, the peeling component 200 is arranged close to the outlet end 113. That is to say, the peeling component 200 is located in the lower part of the conveying channel 110. It can be understood that when the solid wire 40 just enters the conveying channel 110 from the inlet end 112, it takes a certain time for the solid wire 40 to be heated and melted. After the peeling component 200 is arranged close to the outlet end 113, the solid wire 40 can absorb enough heat, so that the outer ring of the solid wire 40 gradually melts, and then the outer ring and the inner core of the solid wire 40 are separated by the peeling component 200, increasing the heat absorption area of the solid wire 40 and improving the melting speed of the solid wire 40.

[0068] Moreover, there is a preset distance between the stripping component 200 and the outlet end 113, that is, the first channel 210 and the second channel 220 communicate with the conveying channel 110 at the top and also connect to the conveying channel 110 at the bottom. In this way, after the inner core of the solid wire 40 enters the first channel 210, it is heated and melted and enters the conveying channel 110 at the bottom. After the outer ring of the solid wire 40 enters the second channel 220, it is also heated and melted and enters the conveying channel 110 at the bottom. In this way, the outer ring of the solid wire 40 and the wire melt after the inner core is melted are mixed and then enter the nozzle body 300.

[0069] Of course, in other embodiments of the present application, the stripping component 200 may also be located in the middle region of the conveying channel 110. At this time, after the solid wire 40 absorbs a certain amount of heat, the outer ring of the solid wire 40 softens or even melts. At this time, the stripping component 200 can also separate the outer ring and the inner core of the solid wire 40, increasing the heating area of the solid wire 40 and improving the melting speed of the solid wire 40.

[0070] See Figure 3 、 Figure 4 and Figure 6 In an embodiment, the outlet end 113 is a conical opening. That is to say, the outlet end 113 is in the structure form of a flared opening, and the diameter of the outlet end 113 gradually decreases from top to bottom, and the diameter of the bottom of the outlet end 113 is adapted to the diameter of the output channel 310. In this way, it is convenient for the wire melt in the conveying channel 110 to enter the output channel 310.

[0071] See Figure 3 、 Figure 4 and Figure 6 In an embodiment of the present application, the connecting channel 111 is arranged in an arc shape so that the conveying channel 110 is a curved channel. That is to say, the conveying channel 110 is arranged in a wave shape, and the adjacent two connecting channels 111 are smoothly connected in a transitional manner.

[0072] After the solid wire 40 enters the curved channel, the outer ring of the solid wire 40 can contact the inner wall of the curved channel. While increasing the contact area between the solid wire 40 and the conveying channel 110, it can also play a guiding role in the movement of the solid wire 40, avoiding the influence of the bending part of the conveying channel 110 on the movement of the conveying channel 110 and facilitating the pushing of the solid wire 40.

[0073] Of course, in other embodiments of the present application, the connecting channel 111 is arranged in a straight line so that the conveying channel 110 is a folded channel. That is to say, the conveying channel 110 is bent, and the adjacent two connecting channels 111 are bent to form a corner.

[0074] After the solid wire 40 enters the zigzag channel, the outer ring of the solid wire 40 can contact the inner wall of the zigzag channel to increase the contact area between the solid wire 40 and the conveying channel 110. At the same time, an obtuse angle is formed between two adjacent connecting channels 111 to facilitate the passage of the solid wire 40.

[0075] See 3, Figure 4 and Figure 6 , in one embodiment, the conveying channel 110 and the first channel 210 are coaxially arranged. That is to say, the central axis of the conveying channel 110 coincides with the central axis of the first channel 210. In this way, when the peeling member 200 separates the outer ring and the inner core of the solid wire 40, the cross-sectional shape of the inner core is substantially uniform. Furthermore, the peeling member 200 can transfer heat to the inner core evenly, so that the inner core is heated evenly, ensuring that the inner core can be melted evenly. At the same time, the coaxial arrangement can also ensure that the inner core of the solid wire 40 accurately enters the first channel 210, reducing the moving resistance of the solid wire 40 and facilitating the movement of the solid wire 40 in the conveying channel 110.

[0076] See Figure 3 , Figure 4 and Figure 6 , in one embodiment, the first channel 210 includes a tapered section 211 and a straight channel 212, and the tapered section 211 is arranged at the entrance of the straight channel 212. That is to say, the tapered section 211 is arranged at the top of the straight channel 212, and the diameter of the tapered section 211 gradually decreases from top to bottom. The diameter of the straight channel 212 is the same as the diameter of the bottom of the tapered section 211 (as shown in Figure 10 ). In this way, the tapered section 211 can play a guiding role to make the inner core of the separated solid wire 40 easily enter the first channel 210.

[0077] In one embodiment, the peeling member 200 and the heat-conducting member 100 are of an integral structure. That is to say, the peeling member 200 and the heat-conducting member 100 are processed by an integral molding method to simplify the production process of the melting nozzle 10. Of course, in other embodiments of the present application, the peeling member 200 can also be separately arranged from the heat-conducting member 100, and the peeling member 200 is fixed to the conveying channel 110 by interference fit, clamping and other methods.

[0078] See Figure 3 , Figure 4 and Figure 6 , in this embodiment, the number of the peeling members 200 is one. One peeling member 200 is arranged in the conveying channel 110. After the outer ring and the inner core of the solid wire 40 are separated by the peeling member 200, the solid wire 40 can be fully heated to output the wire melt.

[0079] Of course, in other embodiments of the present application, the number of the stripping components 200 may also be two, and the two stripping components 200 are arranged at intervals along the axial direction. That is, after the outer ring and the inner core of the solid wire 40 are separated by the previous stripping component 200, the next stripping component 200 can further strip the inner core of the solid wire 40, so that the solid wire 40 can be fully heated and melted.

[0080] See Figure 3 , Figure 4 , Figures 6 to 10 , in one embodiment, the stripping component 200 includes a diversion block 230 and a support rib 240. The diversion block 230 is arranged in the conveying channel 110. The diversion block 230 has a first channel 210 and encloses a second channel 220 with the inner wall of the conveying channel 110. The support rib 240 is arranged on the outer wall of the diversion block 230 to support and connect the inner wall of the conveying channel 110 and the outer wall of the diversion block 230. Figure 7 is Figure 2 the side view of the melting nozzle 10 shown in Figure 8 is Figure 7 the cross-sectional view of the melting nozzle 10 at C-C shown in Figure 9 is Figure 5 the cross-sectional view of the melting nozzle 10 at D-D shown in Figure 10 is Figure 8 the partial enlarged view of the melting nozzle 10 at E shown in

[0081] The diversion block 230 is the main component of the stripping component 200 for separating the outer ring and the inner core of the solid wire 40. The middle area of the diversion block 230 has a first channel 210. The first channel 210 penetrates the diversion block 230 along the axial direction. The outer wall of the diversion block 230 and the inner wall of the conveying channel 110 enclose an annular second channel 220. The support rib 240 is located in the conveying channel 110 and is arranged on the outer wall of the diversion block 230. The support rib 240 can support and connect the outer wall of the diversion block 230 and the inner wall of the conveying channel 110 to support and fix the diversion block 230 in the conveying channel 110.

[0082] Since the outer ring of the solid wire 40 has melted after being heated, when the solid wire 40 contacts the top of the diversion block 230 under the pushing force, the top of the diversion block 230 can separate the outer ring and the inner core of the solid wire 40. The softer outer ring of the solid wire 40 is separated from the hard inner core of the solid wire 40. At this time, the outer ring of the solid wire 40 enters the second channel 220, and the inner core of the solid wire 40 enters the first channel 210.

[0083] At this time, the heat-conducting component 100 can conduct heat to the outer ring of the solid wire 40 in the second channel 220, so that the outer ring of the solid wire 40 continues to be heated and melted. At the same time, the support rib 240 can establish a connection between the heat-conducting component 100 and the diversion block 230. Furthermore, the support rib 240 can conduct heat to the diversion block 230, and the diversion block 230 is also affected by the thermal radiation in the conveying channel 110, so that the diversion block 230 can also conduct heat.

[0084] In this way, the diversion block 230 can conduct heat to the inner core of the solid wire 40 in the first channel 210. The inner core of the solid wire 40 can directly contact the diversion block 230, reducing the distance between the inner core of the solid wire 40 and the heat source, so that the inner core of the solid wire 40 is heated and melted. In this way, the outer ring and the inner core of the solid wire 40 can be heated separately, increasing the heating area of the solid wire 40 and improving the melting efficiency of the solid wire 40.

[0085] In one embodiment, the heat-conducting component 100, the support rib 240 and the diversion block 230 are of an integral structure. Of course, in other embodiments of the present application, the support rib 240 and the diversion block 230 can also be of an integral structure and are fixed in the conveying channel 110 of the heat-conducting component 100 by interference fit or clamping; or, the support rib 240 and the heat-conducting component 100 can also be of an integral structure and are fixed to the diversion block 230 by interference fit or clamping; or, the heat-conducting component 100, the support rib 240 and the diversion block 230 are separately arranged and are fixed by interference fit or clamping.

[0086] See Figure 3 、 Figure 4 、 Figures 6 to 9 In one embodiment, the number of the support ribs 240 is multiple, and the multiple support ribs 240 are arranged at intervals along the circumferential direction of the diversion block 230. The multiple support ribs 240 are evenly or unevenly distributed on the outer periphery of the diversion block 230, and the diversion block 230 can be reliably fixed to the heat-conducting component 100 through the multiple support ribs 240.

[0087] At the same time, the support rib 240 can also divide the second channel 220 into multiple flow channels to divert the wire melt in the second channel 220, facilitating the flow of the wire melt. It should be noted that the structural form of the support rib 240 is not limited in principle, as long as the support rib 240 can support the diversion block 230.

[0088] See Figure 3 、 Figure 4 、 Figures 6 to 9, in one embodiment, the axial length of the support rib 240 along the heat conducting component 100 is less than the axial length of the diversion block 230 along the heat conducting component 100. That is to say, in the axial direction, the length of the support rib 240 is less than the length of the diversion block 230. In this way, the contact area between the support rib 240 and the wire melt can be reduced, facilitating the flow of the wire melt in the second channel 220.

[0089] Of course, in other embodiments of the present application, the circumferential length of the support rib 240 can also be adapted to the length of the diversion block 230. At this time, the outer walls of the support rib 240, the diversion block 230, and the inner wall of the conveying channel 110 can enclose a plurality of second channels 220. At this time, the outer rings of the solid wires 40 can also be accommodated in the plurality of second channels 220.

[0090] See Figure 3 、 Figure 4 、 Figures 6 to 9 , in one embodiment, the diversion block 230 is ellipsoidal, and the shape of the second channel 220 is adapted to the outer contour shape of the diversion block 230. That is to say, the outer contour shape of the diversion block 230 is arc-shaped. In this way, the outer wall of the diversion block 230 can guide the flow of the outer ring of the solid wire 40, reducing the movement resistance of the outer ring of the solid wire 40 in the second channel 220.

[0091] Of course, in other embodiments of the present application, the diversion block 230 can also be plate-shaped, prismatic or other shapes, as long as it can separate the outer ring and the inner core of the solid wire 40 and increase the heat receiving area of the solid wire 40.

[0092] In one embodiment, the axial length of the diversion block 230 along the heat conducting component 100 is 1 / 3 to 1 / 5 of the axial length of the conveying channel 110 along the heat conducting component 100. In this way, the diversion block 230 can have a certain axial length, and the heat conducting component 100 and the diversion block 230 can conduct heat to the outer ring and the inner core of the solid wire 40, enabling the outer ring and the inner core of the solid wire 40 to be fully heated, and further enabling the solid wire 40 to be fully melted.

[0093] See Figure 3 、 Figure 4 、 Figure 6 and Figure 8, for the melting nozzle 10 of the present application, after the solid wire 40 enters the conveying channel 110 from the inlet end 112, the heat conducting member 100 conducts heat to the solid wire 40, so that the solid wire 40 is heated and deformed to adapt to the shape of the conveying channel 110, increasing the contact area between the outer circle of the solid wire 40 and the conveying channel 110 and improving the melting efficiency. During the movement of the solid wire 40 in the conveying channel 110, the outer circle of the solid wire 40 is softened by heat and then gradually melted. At the same time, the inner core of the solid wire 40 is heated up, preparing for the solid wire 40 to enter the peeling member 200.

[0094] When the end of the solid wire 40 moves to the diversion block 230, the diversion block 230 can separate the outer circle and the inner core of the solid wire 40. The outer circle of the solid wire 40 enters the second channel 220, and the inner core of the solid wire 40 enters the first channel 210. At this time, the heat conducting member 100 and the support rib 240 can conduct heat to the outer circle of the solid wire 40 in the second channel 220, so that the outer circle of the solid wire 40 is heated and melted. The diversion block 230 can conduct heat to the inner core of the solid wire 40 in the first channel 210, so that the inner core of the solid wire 40 is heated and melted. In this way, the heat receiving area of the solid wire 40 can be increased. Under the combined heat transfer action of the heat conducting member 100 and the diversion block 230, the outer circle and the inner core of the solid wire 40 can be quickly melted, so that the solid wire 40 forms a wire melt and is ejected from the nozzle body 300.

[0095] The nozzle body 300 increases the heat receiving area of the solid wire 40 and the conveying channel 110 through the connecting channels 111 facing in opposite directions. At the same time, the melted outer circle of the solid wire 40 is separated by the peeling member 200, reducing the heat conduction distance between the inner core and the heat conducting member 100, enabling the heat conducting member 100 to transfer heat to the inner core faster and increasing the heat receiving area of the solid wire 40. In this way, the solid wire 40 is easier to melt and can be quickly melted, so that the solid wire 40 can quickly reach the molten state, improving the printing speed and ensuring the printing quality.

[0096] See Figures 1 to 4 , the present application also provides a 3D printer, including a throat structure 50 and the melting nozzle 10 in any of the above embodiments. The throat structure 50 is arranged at the inlet end 112 of the melting nozzle 10. The throat structure 50 is arranged at the inlet end 112 of the melting nozzle 10 to guide the solid wire 40 into the conveying channel 110.

[0097] After the 3D printer of the present application adopts the melting nozzle 10 of the above embodiment, the heat receiving area of the solid wire 40 can be increased, enabling the solid wire 40 to be quickly melted, avoiding nozzle blockage, increasing the extrusion rate of the melting nozzle 10, improving the printing efficiency, and ensuring the printing quality.

[0098] See Figures 1 to 4 In one embodiment, the throat structure 50 includes a connecting member 501 and a throat 502. The connecting member 501 is in a hollow structural form. The throat 502 is disposed in the connecting member 501 and extends axially out of the connecting member 501. The connecting member 501 is disposed at the inlet end 112 of the heat conducting member 100. The throat 502 can be docked with the propulsion mechanism of the solid wire 40 to convey the solid wire 40 through the throat 502 into the conveying channel 110.

[0099] See Figures 1 to 4 In one embodiment, the throat structure 50 further includes a heat dissipating member 503. The heat dissipating member 503 is disposed outside the throat 502 and has a predetermined spacing from the connecting member 501. The heat dissipating member 503 can play a role in heat dissipation. After the heat conducting member 100 transfers heat to the solid wire 40, due to the effect of heat conduction, the connecting member 501 and the throat 502 will also be heated. At this time, the heat dissipating member 503 can dissipate the heat of the throat 502, minimizing the heat received by the solid wire 40 in the throat 502, and thus avoiding the situation where the solid wire 40 melts in the throat 502 and blocks the throat 502.

[0100] At the same time, there is a certain spacing between the heat dissipating member 503 and the connecting member 501 in the axial direction, so that the connecting member 501 will not directly conduct heat to the heat dissipating member 503. It should be noted that the structural form of the heat dissipating member 503 is not limited 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.

[0101] 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 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.

[0102] 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 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 a conveying channel that penetrates through both axial ends of the heat-conducting component. The conveying channel includes a plurality of sequentially connected connecting channels, and along the axial direction of the heat-conducting component, the orientations of two adjacent connecting channels are opposite; And A peeling component disposed in the conveying channel. The peeling component has a first channel that penetrates axially along the heat-conducting component, and the outer wall of the peeling component and the inner wall of the conveying channel enclose a second channel; Wherein, both the first channel and the second channel communicate with the conveying channel.

2. The melting nozzle according to claim 1, characterized in that, The connecting channels are arranged in an arc shape so that the conveying channel is a curved channel; Or, the connecting channels are arranged in a straight line so that the conveying channel is a zigzag channel.

3. The melting nozzle according to claim 1, characterized in that The conveying channel is coaxially arranged with the first channel; And / or, the first channel includes a conical section and a straight channel, and the conical section is disposed at the entrance of the straight channel.

4. The melting nozzle according to claim 1, characterized in that, The conveying channel has an inlet end and an outlet end along the axial direction of the heat-conducting component. The peeling component is disposed near the outlet end and has a preset distance from the outlet end.

5. The melting nozzle according to claim 1, characterized in that, The peeling component includes a diversion block and support ribs. The diversion block is disposed in the conveying channel. The diversion block has the first channel and encloses the second channel with the inner wall of the conveying channel; The support ribs are disposed on the outer wall of the diversion block to support and connect the inner wall of the conveying channel and the outer wall of the diversion block.

6. The melting nozzle according to claim 5, characterized in that, The number of the support ribs is multiple, and the multiple support ribs are spaced along the circumferential direction of the diversion block; And / or, the axial length of the support rib along the heat-conducting component is less than the axial length of the diversion block along the heat-conducting component.

7. The melt nozzle according to claim 5, characterized in that, The diversion block is in an ellipsoidal shape, and the shape of the second channel is adapted to the outer contour shape of the diversion block.

8. The melt nozzle according to claim 5, characterized in that, The axial length of the diversion block along the heat-conducting component is 1 / 3 to 1 / 5 of the axial length of the conveying channel along the heat-conducting component.

9. The melt nozzle according to any one of claims 1 to 8, characterized in that, The melting nozzle further has a nozzle body having an output channel. The nozzle body is disposed at one end of the heat-conducting component, and the output channel communicates with the conveying channel.

10. A 3D printer, characterized in that, Comprising a throat structure and the melting nozzle according to any one of claims 1 to 9, wherein the throat structure is disposed at the inlet end of the melting nozzle.

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