Melting assembly, melting assembly and heating structure for melting 3D printing consumable, and 3D printer

Abstract

A melting assembly and heating structure for melting a 3D printing consumable, and a 3D printer. The melting assembly comprises: a heat conduction piece, at least one flow channel configured to guide a consumable being formed inside the heat conduction piece, an accommodating groove being further formed in the heat conduction piece, and the accommodating groove being communicated with the flow channel; and an insertion piece disposed in the accommodating groove and connected to the heat conduction piece, wherein a first gap configured to achieve the pressing of the consumable is formed between at least part of the insertion piece and the peripheral wall of the accommodating groove. By forming the gap, on one hand, the flow distance of the consumable in a body can be increased, i.e., heating time is prolonged; on the other hand, the heat conduction piece presses the consumable through the gap, so that the thermal contact distance of the axis of the consumable can be reduced; in addition, compared with a linear flow channel, the gap can increase the thermal contact area of the consumable, thereby facilitating the melting of the consumable.

Description

Melting component, melting component and heating structure for melting 3D printing consumables, and 3D printer

[0001] Cross-references to related publications

[0002] The present disclosure claims priority to Chinese patent applications with application number 2023116308261 filed with the Chinese Patent Office on November 30, 2023, entitled “Melting component and 3D printer for melting 3D printing consumables” and with application number 2024223961553 filed with the Chinese Patent Office on September 29, 2024, entitled “A nozzle assembly and 3D printer”, the entire contents of which are incorporated by reference into the present disclosure. Technical Field

[0003] The present disclosure relates to the field of 3D printing technology, and in particular to a melting component, a melting component and a heating structure for melting 3D printing consumables, and a 3D printer. Background Art

[0004] As 3D printing technology becomes more and more mature, the speed of 3D printers is also constantly improving. In order to achieve high-speed and high-quality printing effects, traditional nozzle melting technology can no longer meet the needs of high-speed printing.

[0005] In the prior art, the thermal conductivity of consumables is generally below 1W / m·K. For the melting of consumables, most of the methods are to increase the number of flow channels in the nozzle or heating block, or to extend the length of the flow channels to increase the contact area between the consumables and the heating block or nozzle, thereby increasing the melting rate of the consumables. However, in the above two solutions, extending the length of the flow channels will cause the overall structure to be lengthened, which is inconvenient to install. Moreover, when the length of the heating block or nozzle is extended, the torque resistance will deteriorate. In the method of increasing the contact area, the heating of the consumable core still has the problem of low melting speed of the consumables, which cannot meet the requirements for melting the consumables during high-speed printing. Summary of the Invention

[0006] The technical problem to be solved by the present disclosure is to provide a melting component, a melting component and a heating structure for melting 3D printing consumables, and a 3D printer, which can extrude the consumables, thereby further improving the melting rate of the consumables.

[0007] In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

[0008] In a first aspect, the present disclosure provides a melting assembly for melting 3D printing consumables, comprising:

[0009] A heat conducting member, wherein the heat conducting member is provided with at least one flow channel configured to guide the consumable material, and the heat conducting member is further provided with a receiving groove, the receiving groove being in communication with the flow channel;

[0010] A plug-in component is disposed in the receiving groove and connected to the heat conducting component;

[0011] Wherein, a first gap configured to extrude consumables is provided between at least a portion of the connector and the peripheral wall of the accommodating groove.

[0012] Optionally, the heat conducting member is further provided with an outlet configured to guide the extruded consumable to flow out, and the axis of the outlet and the axis of the flow channel are staggered with each other, or;

[0013] The axis of the outlet is coaxial with the axis of the flow channel.

[0014] Optionally, the axis of the accommodating groove is arranged at an angle to the axis of the flow channel.

[0015] Optionally, the plug-in connector includes an inserting section configured to be inserted into the receiving groove, and the gap is formed between at least a portion of the inserting section and a groove wall of the receiving groove;

[0016] The inserting section abuts against one end of the accommodating groove; or a distance is left between the inserting section and one end of the accommodating groove.

[0017] Optionally, the flow channel includes at least two first sub-flow channels and one second sub-flow channel, and the first sub-flow channels are arranged along the circumference of the second sub-flow channel.

[0018] A cross-sectional area of ​​the second sub-flow channel is smaller than a cross-sectional area of ​​the first sub-flow channel.

[0019] Optionally, the first sub-channel is connected to the second sub-channel.

[0020] Optionally, the melting assembly further includes a heating plate, and the heating plate is attached to the outer surface of the heat conducting member.

[0021] Optionally, there are multiple flow channels.

[0022] Optionally, the connector is a heating rod.

[0023] In a second aspect, the present disclosure provides a melting assembly, comprising:

[0024] A heat conducting member, wherein the heat conducting member is provided with a through-type heating channel for conveying consumables, the heating channel comprising a preheating channel and a channel, the preheating channel and the channel being sequentially connected in the conveying direction;

[0025] The flow channel has a pair of wall surfaces arranged opposite to each other, the distance between the pair of wall surfaces is smaller than the diameter of the consumable, and the cross-sectional area of ​​the flow channel is larger than the cross-sectional area of ​​the consumable.

[0026] Optionally, a guide channel is provided at at least one end of the flow channel, and the guide channel is used to guide the consumables to pass through the heating flow channel.

[0027] Optionally, the wall surface and the extension direction of the preheating channel are arranged to intersect.

[0028] Optionally, the wall surface and the extension direction of the preheating channel are arranged in parallel.

[0029] Optionally, in the conveying direction, the preheating channel has a guide section and a stripping section connected in sequence, and the stripping section is connected to the channel; wherein the cross-sectional area of ​​the guide section gradually decreases in the conveying direction.

[0030] Optionally, the inner wall of the preheating channel has a plurality of protrusions, and the plurality of protrusions are arranged at intervals along the circumference of the preheating channel, and the protrusions extend along the conveying direction, and a first sub-channel is formed between adjacent protrusions, and a second sub-channel is formed between the ends of all the protrusions facing away from the inner wall of the preheating channel, and the cross-sectional area of ​​the second sub-channel gradually decreases; the minimum cross-sectional area of ​​the second sub-channel is smaller than the cross-sectional area of ​​the consumable, and / or the cross-sectional area of ​​the first sub-channel is larger than the cross-sectional area of ​​the second sub-channel.

[0031] In a third aspect, the present disclosure proposes a heating structure for melting 3D printing consumables, comprising: a body, a flow channel, a gap, and an outlet;

[0032] The flow channel, gap and outlet are all arranged inside the body and are connected in sequence;

[0033] The gap spacing is smaller than the diameter of the consumables. The consumables enter the body through the flow channel, are squeezed into sheets at the gap, and flow out of the body from the outlet.

[0034] Optionally, the gap includes a first wall surface and a second wall surface; the first wall surface and the second wall surface are formed by the inner wall of the body.

[0035] Optionally, the body includes a heat conductor and a connector, the heat conductor has a receiving groove, the connector is inserted into the receiving groove and sealed with the heat conductor, and the first wall and the second wall are formed by the inner wall of the receiving groove and the outer wall of the connector.

[0036] Optionally, the distance between the first wall and the second wall is 0.2 to 0.75 times the diameter of the consumable.

[0037] Optionally, at least a portion of the first wall surface and the second wall surface is a rectangular plane, an elliptical plane, a rounded prismatic plane, a polygonal plane, a torus, or a semi-torus.

[0038] Optionally, the first wall surface and the second wall surface are rounded prism planes, and the flow channel and the outlet are respectively located at the diagonals of the rounded prism planes and are perpendicular to the rounded prism planes.

[0039] Optionally, the heating structure further includes a drainage portion, and the drainage portion is provided between the flow channel and the gap;

[0040] And / or the drainage portion is arranged between the gap and the outlet.

[0041] Optionally, the flow channel preheats the consumables, and the flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel is connected to the second sub-flow channel, and the first sub-flow channel is arranged along the circumference of the second sub-flow channel.

[0042] Optionally, the flow channel further includes a transition flow channel, and the first sub-flow channel and the second sub-flow channel are both connected to the transition flow channel, and the consumables enter the first sub-flow channel and the second sub-flow channel through the transition flow channel.

[0043] In a fourth aspect, the present disclosure proposes a melting component for melting 3D printing consumables, the melting component including any of the heating structures described above, and also including a throat and a nozzle; the throat is connected to the body through the flow channel; the nozzle is connected to the outlet and connected to the body.

[0044] In a fifth aspect, the present disclosure proposes a 3D printer comprising: a melting component as described in any one of the above items.

[0045] The technical solution disclosed in this disclosure has the following effects:

[0046] The melting component proposed in the present disclosure, in a first aspect, is configured by setting at least one flow channel configured to guide the flow of consumables in the heat conductive part, and providing a receiving groove configured to accommodate a connector in the heat conductive part, the receiving groove is connected to the flow channel, and the connector and the groove peripheral wall of the receiving groove are provided with a first gap configured to extrude the consumables. When the connector transfers heat to the heat conductive part, the heat conductive part and the connector can heat the consumables in the first gap. When the consumables enter the first gap from the flow channel, the consumables are heated along the circumference of the first gap, increasing the heating area, and are squeezed at the same time. The extruded consumables can melt quickly, thereby improving the melting rate of the consumables by the melting component and meeting the needs of fast printing.

[0047] The second aspect of the melting assembly proposed in the present disclosure is to allow the consumables to pass through the flow channel for preheating and the gap for rapid melting in sequence. After being preheated in the flow channel, the consumables are softened, which is conducive to their deformation and entry into the gap; the consumables are compressed into a thinner shape in the gap, which can improve the heat conduction effect on the core of the consumables; the cross-sectional area of ​​the melting flow channel is larger than the cross-sectional area of ​​the consumables, which on the one hand increases the contact area between the consumables and the body, helping to improve the heat transfer efficiency, and on the other hand reduces the propulsion resistance of the consumables, thereby accelerating the melting speed of the consumables. This design is particularly suitable for application scenarios that require high-speed printing and can significantly improve printing speed and efficiency.

[0048] The third aspect of the heating structure proposed in the present disclosure is that the flow distance of the consumable in the body can be increased by setting a gap; and the heat conductor squeezes the consumable through the gap, which can reduce the distance from the axis of the consumable to the heat conductor. At the same time, the gap can also increase the thermal contact area of ​​the consumable compared to the linear flow channel, which is beneficial to increase the melting rate of the consumable and meet the needs of fast printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments of the present disclosure. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0050] FIG1 is a schematic diagram of the three-dimensional structure of a melting assembly provided in a first embodiment of the present disclosure;

[0051] FIG2 is a schematic diagram of the three-dimensional structure of the heat conducting member provided in the first embodiment of the present disclosure;

[0052] FIG3 is a schematic top view of the heat conducting member of FIG2 of the present disclosure;

[0053] FIG4 is a schematic cross-sectional view of the melting assembly of FIG1 of the present disclosure;

[0054] FIG5 is a schematic top view of the heat conducting member provided in the second embodiment of the present disclosure;

[0055] FIG6 is a schematic cross-sectional view of the melting assembly formed by the heat conducting member of FIG5 of the present disclosure;

[0056] FIG7 is a schematic top view of the structure of a heat conducting member provided in a third embodiment of the present disclosure;

[0057] FIG8 is a schematic cross-sectional view of the melting assembly formed by the heat conducting member of FIG7 of the present disclosure;

[0058] FIG9 is a schematic top view of the structure of a heat conducting member provided in a fourth embodiment of the present disclosure;

[0059] FIG10 is a schematic diagram of the three-dimensional structure of a melting assembly provided in a fifth embodiment of the present disclosure;

[0060] FIG11 is a schematic top view of the melting assembly of FIG10 of the present disclosure;

[0061] FIG12 is a schematic cross-sectional view of the melting assembly of FIG10 of the present disclosure;

[0062] FIG13 is a schematic cross-sectional view of a melting assembly according to a sixth embodiment of the present disclosure;

[0063] FIG14 is a schematic top view of the structure of a melting assembly provided in a seventh embodiment of the present disclosure;

[0064] FIG15 is a schematic cross-sectional view of the melting assembly of FIG14 of the present disclosure;

[0065] FIG16 is a schematic cross-sectional view of a melting assembly according to an eighth embodiment of the present disclosure;

[0066] FIG17 is a schematic cross-sectional view of a melting assembly according to a ninth embodiment of the present disclosure;

[0067] FIG18 is a schematic cross-sectional view of a melting assembly according to a tenth embodiment of the present disclosure;

[0068] FIG19 is a schematic cross-sectional view of a melting assembly according to an eleventh embodiment of the present disclosure;

[0069] FIG20 is a schematic cross-sectional view of a melting assembly according to a twelfth embodiment of the present disclosure;

[0070] FIG21 is a schematic diagram of the exploded structure of the melting assembly provided in the thirteenth embodiment of the present disclosure;

[0071] FIG22 is a schematic cross-sectional view of a melting assembly according to a thirteenth embodiment of the present disclosure;

[0072] FIG23 is a schematic diagram of the explosion structure of the melting assembly provided in the fourteenth embodiment of the present disclosure;

[0073] FIG24 is a schematic cross-sectional view of a melting assembly according to a fourteenth embodiment of the present disclosure;

[0074] FIG25 is a schematic diagram of the structure of a melting assembly provided in the fifteenth embodiment of the present disclosure from one perspective (left) and a schematic diagram of the structure of an AA cross-section (right);

[0075] FIG26 is a schematic structural diagram of the melting assembly provided in the fifteenth embodiment of the present disclosure from another perspective (left) and a schematic structural diagram of the BB cross-section (right);

[0076] FIG27 is a schematic structural diagram of a melting assembly provided in the sixteenth embodiment of the present disclosure from one perspective (left) and a CC cross-sectional structural diagram thereof;

[0077] FIG28 is a schematic diagram of the DD cross-sectional structure in FIG27 of the present disclosure;

[0078] FIG29 is a schematic structural diagram of a melting assembly provided in the seventeenth embodiment of the present disclosure from one perspective (left) and a schematic structural diagram of an EE cross-section (right);

[0079] FIG30 is a schematic structural diagram of a melting assembly provided in the seventeenth embodiment of the present disclosure from another perspective and a schematic cross-sectional structural diagram thereof in FF view;

[0080] FIG31 is a schematic diagram of the cross-sectional structure of GG in FIG30 of the present disclosure.

[0081] FIG32 is a schematic structural diagram of a melting assembly in the prior art.

[0082] Icon: 200-main body; 1-heat conducting part; 11-flow channel; 111-first sub-flow channel; 112-second sub-flow channel; 113-columnar flow channel; 12-first connecting flow channel; 13-transition flow channel; 14-accommodating groove; 15-outlet; 16-second connecting flow channel; 2-connector; 21-insertion section; 22-fixing part; 23-protrusion; 3-first gap; 4-second gap; 5-throat; 6-nozzle; 7-blocking part; 210-heating flow channel; 212-gap; 2121-wall; 21211-first wall; 21212-second wall; 213-first drainage part; 2131-first connection port; 214-second drainage part; 2141-second connection port; 220-protrusion. DETAILED DESCRIPTION

[0083] The technical solutions in the embodiments of the present disclosure will be described below with reference to the accompanying drawings in the embodiments of the present disclosure.

[0084] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present disclosure, the terms "first," "second," etc. are only configured to distinguish the description and should not be understood as indicating or implying relative importance.

[0085] An embodiment of the present disclosure provides a heating structure for melting 3D printing consumables.

[0086] The embodiments of the present disclosure introduce a heating structure for melting 3D printing consumables, as shown in Figures 2, 4 and 27, comprising: a body 200, a flow channel 11, a gap 212, and an outlet 15; the flow channel 11, the gap 212, and the outlet 15 are all arranged inside the body 200 and are connected in sequence; the spacing between the gaps 212 is smaller than the diameter of the consumables, so that when the consumables enter the body 200 through the flow channel 11, they are squeezed into sheets at the gaps 212 and flow out of the body 200 through the outlet 15.

[0087] It is understandable that by providing a gap 212 within the body 200, when the consumable flows from the flow channel 11 into the gap 212, the gap 212 can squeeze and heat the consumable, squeezing the consumable into a sheet, causing the consumable to flow along the gap 212, thereby reducing the distance from the consumable axis to the inner wall of the body 200, that is, shortening the heat conduction distance, and causing the consumable axis to heat faster. Therefore, by providing the gap 212, on the one hand, the flow distance of the consumable within the body 200 can be increased, that is, the heating time can be increased; on the other hand, the heat conducting member 1 squeezes the consumable through the surface gap 212, thereby reducing the thermal contact distance of the consumable axis. At the same time, the gap 212 can also increase the thermal contact area of ​​the consumable compared to the linear flow channel 11, both of which are beneficial to increasing the melting rate of the consumable and meeting the needs of fast printing.

[0088] In this embodiment, the gap 212 is formed by a first wall surface 21211 and a second wall surface 21212 of the body 200 .

[0089] In this embodiment, as shown in FIG. 25 to FIG. 31 , the first wall surface 21211 and the second wall surface 21212 are, or at least a portion thereof is, a rectangular plane, an elliptical plane, a rounded prismatic plane, a polygonal plane, or the like.

[0090] In some optional embodiments, as shown in Figures 25-31, the main body 200 includes a heat conducting member 1, and the first wall surface 21211 and the second wall surface 21212 can be formed by the inner wall of the main body 200.

[0091] In some optional embodiments, as shown in Figures 1-24, the body 200 includes a heat conductor 1 and a connector 2. The first wall 21211 and the second wall 21212 can be formed by the inner wall of the heat conductor 1 and the outer wall of the connector 2, respectively, thereby forming an annular or semi-annular gap surface. Compared to a planar gap surface, an annular or semi-annular gap surface can provide a larger thermal contact surface for the consumables. The heat conductor 1 and the connector 2 can be provided separately or as a whole. When provided separately, the connector 2 can be directly used as a heat source to directly heat the consumables.

[0092] In some optional embodiments, as shown in Figures 26 and 27, the gap 212 is arranged in the horizontal direction, that is, the gap 212 intersects the axis of the flow channel 11 and the outlet 15 perpendicularly, which is beneficial for controlling the overall length of the melting component, thereby facilitating the control of the stability of the melting component during the printing process.

[0093] In some optional embodiments, as shown in FIG. 29 and FIG. 30 , the gap 212 is arranged along the vertical direction, that is, the gap 212 is arranged parallel to the extension direction of the flow channel 11 and the outlet 15 .

[0094] In other optional embodiments, as shown in Figure 28, the first wall 21211 and the second wall 21212 are rounded prismatic planes, and the flow channel 11 and the outlet 15 are respectively located at the diagonals of the rounded prismatic planes and perpendicular to the rounded prismatic planes. This can reduce the flow dead corners formed when the consumables flow in the gap 212.

[0095] In this embodiment, as shown in Figures 3, 7, 9, 28, and 31, the flow channel 11 preheats the consumables. The flow channel 11 includes a first sub-flow channel 111 and a second sub-flow channel 112. Furthermore, the first sub-flow channel 111 is connected to the second sub-flow channel 112, and the first sub-flow channel 111 is arranged along the circumference of the second sub-flow channel 112.

[0096] The number of the second sub-channel 112 is one; the number of the first sub-channel 111 can be set to at least one, and can be optionally two, three, etc.

[0097] Optionally, a cross-sectional area of ​​the second sub-channel 112 is smaller than a cross-sectional area of ​​the first sub-channel 111 .

[0098] It can be understood that the preheated consumable enters the channel 11 composed of the first sub-channel 111 and the second sub-channel 112. The first sub-channel 111 cooperates with the second sub-channel 112 to peel off the outer surface of the preheated consumable, so that the outer surface of the consumable enters the first sub-channel 111, and the inner core of the consumable that receives less heat can enter the second sub-channel 112 for direct heating, thereby improving the melting efficiency of the consumable and thus improving the heating efficiency.

[0099] In this embodiment, as shown in Figures 3, 4, 7 to 9, and 11 to 15, the flow channel 11 also includes a transition flow channel 13, the first sub-flow channel 111 and the second sub-flow channel 112 are both connected to the transition flow channel 13, and the consumables enter the first sub-flow channel 111 and the second sub-flow channel 112 from the transition flow channel 13.

[0100] In this embodiment, as shown in FIG. 27 , the heating structure further includes a drainage portion, and the drainage portion includes a first drainage portion 213 and / or a second drainage portion 214 .

[0101] Optionally, the drainage portion may be provided between the flow channel 11 and the gap 212. The drainage portion may be provided between the gap 212 and the outlet 15. The drainage portion may also be provided between the flow channel 11 and the gap 212 and between the gap 212 and the outlet 15.

[0102] The disclosed embodiment also provides a melting assembly for melting 3D printing consumables.

[0103] In this embodiment, as shown in FIG. 1 and FIG. 25 , the melting assembly includes a heating structure and a throat 5 : the throat 5 is connected to the body 200 through the flow channel 11 .

[0104] In this embodiment, the melting assembly further includes a nozzle 6 ; the nozzle 6 is connected to the body 200 through the outlet 15 .

[0105] The disclosed embodiments also provide a more specific heating structure and melting assembly for melting 3D printing consumables.

[0106] As an embodiment, the main body 200 of the heating structure includes a heat conducting member 1 and a connector 2. The gap 212 is a gap formed by the inner wall of the heat conducting member 1 and the outer wall of the connector 2. Furthermore, the gap may include a first gap 3 and a second gap 4.

[0107] As shown in Figures 1 to 24, the embodiments of the present disclosure introduce a melting component for melting 3D printing consumables, including: a heat conductor 1, which has a heat conduction function. The heat conductor 1 is provided with at least one flow channel 11 configured to guide the flow of the consumable. After the heat conductor 1 is heat-conducted, it can transfer heat to the consumable, thereby preheating the consumable. A receiving groove 14 is also provided in the heat conductor 1. The receiving groove 14 is connected to the flow channel 11 and forms a first heating flow channel 210. The receiving groove 14 is configured to accommodate a plug-in component 2, and the plug-in component 2 is connected to the heat conductor 1. A first gap 3 is provided between at least a portion of the plug-in component 2 and the peripheral wall of the receiving groove 14. When the consumable flows from the flow channel 11 into the first gap 3, the heat conductor 1 and the plug-in component 2 can extrude and heat the consumable. At the same time, the consumable flows along the circumference of the plug-in component 2, thereby increasing the flow time and flow area of ​​the consumable. After the consumable is extruded, the melting rate of the consumable can be increased.

[0108] The first gap 3 is surrounded by the inner wall of the heat conducting component 1 and the outer wall of the connector 2 , so the first wall 21211 is the inner wall of the heat conducting component 1 , and the second wall 21212 is the outer wall of the connector 2 .

[0109] Optionally, the connector 2 can itself be a heating element that can generate heat, that is, the connector 2 can use a heating rod, etc.; of course, the connector 2 itself may not be a heating element and can be heat-conducted, that is, heat is transferred through the heating plate outside the heat-conducting part 1. When the connector 2 itself does not have a heating function, the connector 2 can use metal parts such as copper or aluminum alloy.

[0110] Optionally, the heat conductor 1 can be made of metal such as copper or aluminum alloy. The heat source of the heat conductor 1 can be transferred through the connector 2 or heated by a heating plate attached to the outside of the heat conductor 1.

[0111] Optionally, the heat conductor 1 and the connector 2 can be connected by a threaded connection or an interference fit; the accommodating groove 14 can be a columnar structure or other prismatic structure. If a columnar structure is adopted, the insertion section 21 of the heat conductor 1 is also set to a columnar structure, and the heat conductor 1 and the connector 2 can be connected by a thread; if a prismatic structure is adopted, the insertion section 21 of the heat conductor 1 is also set to a prismatic shape, and the heat conductor 1 and the connector 2 can be interference fit; of course, the heat conductor 1 and the connector 2 can also be connected by riveting or welding.

[0112] Optionally, the size of the insertion section 21 is slightly smaller than the size of the accommodating groove 14 , so that a first gap 3 is formed between the insertion section 21 and the peripheral wall of the accommodating groove 14 .

[0113] Optionally, the first gap 3 can form a cylindrical structure or a planar structure; wherein, a first gap 3 is provided between at least a portion of the connector 2 and the peripheral wall of the accommodating groove 14, and the insertion section 21 can form the first gap 3 between the entire circumference and the accommodating groove 14, or the first gap 3 can be formed between a part of the circumference of the insertion section 21 and the accommodating groove 14. As shown in Figures 21 to 24, a protrusion 23 is provided on the outer surface of the insertion section 21. When the insertion section 21 is inserted into the accommodating groove 14, a part of the insertion section 21 and the peripheral wall of the accommodating groove 14 form the first gap 3. Similarly, the first gap 3 can extrude the consumable, and the consumable flows along the circumference of the connector 2, thereby increasing the flow time and flow area of ​​the consumable. After the consumable is extruded, the melting rate of the consumable can be increased.

[0114] As shown in Figures 4 and 12, as an embodiment, the heat conductor 1 is further provided with an outlet 15 configured to guide the extruded consumable to flow out, the accommodating groove 14 is respectively connected to the outlet 15 and the flow channel 11, and the axis of the outlet 15 and the axis of the flow channel 11 are staggered with each other, thereby extending the distance that the consumable flows in the first gap 3 along the circumferential direction of the insertion section 21, so that the consumable is heated more fully and the melting rate of the consumable is increased; or; as shown in Figures 18 and 19, the axis of the outlet 15 is coaxially arranged with the axis of the flow channel 11, so that the melting component can reduce the occupied volume in the horizontal direction.

[0115] In the scheme in which the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged perpendicular to each other, as shown in Figures 1 to 4, an optional implementation method is used. The axis of the outlet 15 and the axis of the flow channel 11 are staggered with each other, and the distance between the axis of the outlet 15 and the axis of the flow channel 11 can be adjusted accordingly according to actual needs, thereby extending the distance and duration of the consumable being squeezed in the first gap 3, making the consumable melt more fully, and improving the melting rate of the consumable; in the scheme in which the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged parallel to each other, as shown in Figures 9 to 12, as an optional implementation method, the axis of the outlet 15 and the axis of the flow channel 11 are staggered with each other and the axis of the outlet 15 is coaxial with the accommodating groove 14, so that the consumable can be squeezed out from the first gap 3 and can flow directly out through the outlet 15, shortening the distance the consumable flows after being squeezed.

[0116] Optionally, the flow channel 11 is located on the side of the heat conductor 1, and the position of the outlet 15 can be moved to the lower end of the flow channel 11, so that the axis of the outlet 15 is coaxial with the axis of the flow channel 11; of course, as shown in Figure 18, the outlet 15 is located in the middle position of the heat conductor 1, and the position of the flow channel 11 can also be moved to the upper end of the outlet 15, so that the axis of the outlet 15 is coaxial with the axis of the flow channel 11.

[0117] As an embodiment, the axis of the receiving groove 14 is set at an angle to the axis of the flow channel 11, so that the connector 2 can be inserted into the heat conductor 1 in different directions, and form a first gap 3 with the groove wall of the receiving groove 14, thereby improving the applicability of the melting component and increasing the use requirements of the melting component.

[0118] Optionally, the angle between the axis of the receiving groove 14 and the axis of the flow channel 11 can be any angle between 0 and 90 degrees; for example, as shown in Figures 1 to 4, the axis of the receiving groove 14 and the axis of the flow channel 11 are arranged perpendicular to each other, that is, the axis of the receiving groove 14 and the axis of the flow channel 11 are at a 90-degree angle; or, as shown in Figures 10 to 13, the axis of the receiving groove 14 and the axis of the flow channel 11 are arranged parallel to each other, that is, the axis of the receiving groove 14 and the axis of the flow channel 11 are at a 0-degree angle; of course, the axis of the receiving groove 14 and the axis of the flow channel 11 can also be at a 30-degree angle, a 45-degree angle, or a 60-degree angle.

[0119] As shown in Figures 1 to 4, optionally, the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged perpendicular to each other, so that the distance between the accommodating groove 14 and the flow channel 11 can be shortened, so that after the consumables flow out along the vertical flow channel 11, they can directly enter the first gap 3 and be squeezed without passing through other bending flow channels.

[0120] As shown in Figures 10 to 12, optionally, the axis of the receiving groove 14 and the axis of the flow channel 11 are arranged parallel to each other, that is, the connector 2 can be inserted into the receiving groove 14 in the vertical direction, thereby shortening the space occupied by the melting component in the horizontal direction.

[0121] As shown in Figures 4, 12, 22 and 24, as an embodiment, the connector 2 includes an insertion section 21, and the insertion section 21 is configured to be inserted into the receiving groove 14. A first gap 3 is formed between at least a portion of the insertion section 21 and the circumferential wall of the receiving groove 14. That is, the first gap 3 can be formed between the circumference of a circle of the insertion section 21 and the receiving groove 14, or the first gap 3 can be formed between a part of the circumference of the insertion section 21 and the receiving groove 14.

[0122] As shown in FIG4 , the inner wall and inner bottom wall of the receiving groove 14 of the thermal conductor 1 are the first wall surface 21211, and the outer wall and bottom wall of the insertion section 21 of the plug connector 2 are the second wall surface 21212. The insertion section 21 of the plug connector 2 is inserted into the receiving groove 14 of the thermal conductor 1, so that the first wall surface 21211 and the second wall surface 21212 form the first gap 3 and / or the second gap 4.

[0123] As shown in Figures 21 and 22, optionally, the connector 2 includes a protrusion 23 provided on the outer surface of the insertion section 21. The protrusion 23 can be located on the outer surface of the upper half of the insertion section 21 and connected to the fixing portion 22, so that the circumference of the adjacent end of the insertion section 21 can form a first gap 3 with the accommodating groove 14; as shown in Figures 23 and 24, the protrusion 23 can also be located on the outer surface of the lower half of the insertion section 21, and is spaced apart from the fixing portion 22, so that the outer surface of the upper half of the insertion section 21 and the accommodating groove 14 form a first gap 3, and the consumables can pass through the first gap 3 and pass through the spacing distance between the protrusion 23 and the fixing portion 22 and flow out from the outlet 15.

[0124] As shown in Figure 6, as an embodiment, the insertion section 21 abuts against one end of the receiving groove 14, that is, abuts against the bottom wall of the receiving groove 14, so that the consumables can be squeezed along the circumferential flow of the insertion section 21 and flow out from the outlet 15; of course, the insertion section 21 can also leave a gap with the bottom wall of the receiving groove 14, so that the consumables can flow into the gap and be squeezed, and then be squeezed out through the first gap 3, thereby increasing the melting rate of the consumables.

[0125] Optionally, the distance between the insertion section 21 and one end of the accommodating groove 14 , that is, the bottom wall, can be a gap, or there can be a certain distance between the insertion section 21 and the bottom wall of the accommodating groove 14 .

[0126] Optionally, the distance between the insertion section 21 and one end of the receiving groove 14, i.e., the bottom wall, can be adjusted according to actual conditions. For example, in a scheme where the axis of the receiving groove 14 and the axis of the flow channel 11 are arranged perpendicular to each other, the insertion section 21 can be made shorter, that is, the end of the insertion section 21 does not exceed the position of the flow channel 11; or, the insertion section 21 can exceed the flow channel 11, and leave a gap between it and the bottom wall of the receiving groove 14. The gap can be consistent with the width of the first gap 3 to maintain the stability of the flow of consumables. Of course, the gap can also be larger or smaller than the first gap 3.

[0127] In the scheme in which the axis of the receiving groove 14 and the axis of the flow channel 11 are arranged parallel to each other, the insertion section 21 can also abut against one end of the receiving groove 14, that is, the bottom wall. At this time, an additional second connecting flow channel 16 can be opened in the heat conductor 1, and the second connecting flow channel 16 is respectively connected to the first gap 3 and the outlet 15, which is equivalent to the consumable being squeezed in the first gap 3 and flowing out to the position of the outlet 15 through the second connecting flow channel 16 opened on the peripheral wall of the receiving groove 14; of course, as shown in Figure 12, the insertion section 21 can also leave a gap with the bottom wall of the receiving groove 14 to form a second gap 4, and the outlet 15 is connected to the second gap 4, so that the consumable can enter the second gap 4 and continue to be squeezed after being squeezed in the first gap 3, and the consumable can also flow out smoothly from the outlet 15. Of course, the second gap 4 can be wider so that there is a certain distance between the insertion section 21 and the bottom wall of the receiving groove 14.

[0128] Optionally, in the scheme where the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged parallel to each other, the first gap 3 and the second gap 4 can be set to the same width, or the width of the first gap 3 can be slightly larger than the second gap 4, or slightly smaller than the second gap 4.

[0129] Optionally, the plug connector 2 further includes a fixing portion 22 , which is fixedly connected to the insertion section 21 , and the fixing portion 22 is configured to be connected to the heat conducting member 1 .

[0130] As shown in Figures 12, 13 and 15, as an embodiment, in the scheme in which the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged parallel to each other, the heat conductor 1 is further provided with a first connecting flow channel 12 configured to connect the flow channel 11 with the first gap 3, and a blocking member 7 is further provided at one end of the first connecting flow channel 12. Since the axis of the accommodating groove 14 and the axis of the flow channel 11 are arranged parallel to each other, the consumables cannot flow directly into the first gap 3 after flowing out of the flow channel 11. By setting the first connecting flow channel 12, when the consumables flow out of the flow channel 11, they can enter the first gap 3 through the first connecting flow channel 12, and the first connecting flow channel 12 plays a guiding role.

[0131] Optionally, the first connecting channel 12 penetrates from the outside of the heat conductor 1 for ease of processing. Of course, the first connecting channel 12 can enter from any direction of the heat conductor 1; in order to prevent consumables from flowing out of the first connecting channel 12, a sealing member 7 is provided at the end of the first connecting channel 12, which is configured to prevent consumables from flowing out.

[0132] As shown in Figure 20, optionally, the first connecting channel 12 can be set to an arc-shaped structure, so as to reduce the flow resistance of the consumables at the connection position between the first connecting channel 12 and the channel 11, facilitating the smooth flow of the consumables, and a metal part with an arc shape can be filled in the first connecting channel 12 to form an arc-shaped structure.

[0133] As shown in Figures 3, 4, 7 to 9, and 11 to 15, as an embodiment, the flow channel 11 includes at least two first sub-flow channels 111 and one second sub-flow channel 112, and the multiple first sub-flow channels 111 are arranged along the circumference of the second sub-flow channel 112. The cross-sectional area of ​​the second sub-flow channel 112 is smaller than the cross-sectional area of ​​the first sub-flow channel 111, thereby peeling off the outer surface of the consumable, causing the outer surface of the consumable to flow into the first sub-flow channel 111, and the radial dimension of the inner core of the consumable is small. Therefore, the inner core flows into the second sub-flow channel 112, and the heat conductor 1 heats the inner core separately, reducing the influence of the material on the outer surface of the consumable on the heating of the inner core, improving the heating effect of the heat conductor 1 on the consumable, improving the heating efficiency of the consumable, and further improving the overall melting rate of the consumable.

[0134] Optionally, the cross-sectional area of ​​the first sub-channel 111 can be twice the cross-sectional area of ​​the second sub-channel 112. Of course, it can also be other multiples, such as three, four, or five times. It is understandable that when the preheated consumable passes through the second sub-channel 112 and the first sub-channel 111, the second sub-channel 112 and the first sub-channel 111 are combined to peel off the outer softened portion of the consumable, so that the outer softened portion of the consumable enters the first sub-channel 111, and the axial core portion of the consumable enters the second sub-channel 112 for heating. This arrangement allows the second sub-channel 112 to heat the inner core of the consumable, thereby improving heating efficiency.

[0135] Optionally, the first sub-channel 111 and the second sub-channel 112 constitute the melting channel 11, and the cross-section of the second sub-channel 112 is set to be smaller than the cross-section of the first sub-channel 111 next to it, so that the center of the melting channel 11 becomes thinner. In this way, the melting channel 11 can preheat the consumables, and the outer surface of the preheated consumables will be squeezed into the first sub-channel 111, and the inner core of the consumables will be squeezed into the second sub-channel 112. The protrusion 220 of the heat conductor 1 heats the inner core separately, reducing the influence of the material on the outer surface of the consumables on the heating of the inner core, improving the heating effect of the heat conductor 1 on the consumables, improving the heating efficiency of the consumables, and further improving the overall melting speed of the consumables.

[0136] Optionally, the flow channel 11 and the throat 5 form a preheating section, which can facilitate the deformation of the consumable material, and then be extruded through the first gap 3, thereby increasing the melting rate of the consumable material.

[0137] Optionally, the flow channel 11 may also be a circular hole straight flow channel without the first sub-flow channel 111 and the second sub-flow channel 112 .

[0138] As shown in Figures 3 and 4, Figures 7 and 8, Figures 11 and 12, Figures 14 and 15, as an embodiment, the first sub-channel 111 is connected to the second sub-channel 112, reducing the obstruction of the consumables by the isolation area between the first sub-channel 111 and the second sub-channel 112, improving the smoothness of the flow of the consumables, and at the same time, allowing the outer surface of the preheated consumables to directly enter the first sub-channel 111, and the inner core of the consumables that receives less heat can enter the second sub-channel 112 for direct heating, thereby improving the heating efficiency.

[0139] Optionally, the axis of at least one first sub-channel 111 and the second sub-channel 112 is coaxially arranged with an extension line of the heat conducting member 1 in the same radial direction.

[0140] As shown in Figures 3 and 4, Figures 11 and 12, optionally, the number of first sub-channels 111 is set to two, three, four, etc. Through the above design, the circulation volume of the consumables and the smoothness of the flow of the consumables can be increased. The two first sub-channels 111 can heat the outer surface of the consumables, and the inner core that receives less heat can enter the second sub-channel 112 for direct heating, further improving the heating efficiency.

[0141] As shown in Figures 7 and 8, Figures 14 and 15, optionally, the number of first sub-channels 111 is set to three, and the three first sub-channels 111 are all connected to the second sub-channel 112, thereby increasing the fluidity of the consumables, allowing more of the outer surface of the preheated consumables to flow into the first sub-channel 111, increasing the contact area between the consumables and the first sub-channel 111, and increasing the heating efficiency.

[0142] Optionally, the three first sub-channels 111 are evenly arranged along the circumference of the second sub-channel 112, thereby improving the uniformity of the consumables flowing into the first sub-channel 111 and increasing the flow rate of the consumables entering the first sub-channel 111, further improving the heating efficiency of the consumables.

[0143] As shown in Figure 9, as a parallel embodiment, the first sub-channel 111 and the second sub-channel 112 are spaced apart, and the cross-section of the second sub-channel 112 is smaller than that of the first sub-channel 111, so that the inner core of the consumable can also be peeled off. The second sub-channel 112 heats the inner core alone, and the first sub-channel 111 heats the outer surface of the consumable, thereby improving the heating efficiency of the consumable.

[0144] As shown in Figure 9, the cross-section of the first sub-channel 111 is a closed figure surrounded by multiple arc-shaped edges, which can increase the contact area between the heat conductor 1 and the consumables and improve the heating efficiency. The second sub-channel 112 can be circular or square. As an option, the second sub-channel 112 is circular.

[0145] As shown in Figures 3, 4, 7 to 9, and 11 to 15, as an embodiment, a transition channel 13 is provided in the heat conductor 1, and the transition channel 13 is connected to the channel 11. The end of the transition channel 13 away from the channel 11 is configured as the first end, and the end connected to the channel 11 is configured as the second end, wherein the cross-sectional area of ​​the transition channel 13 gradually decreases from the first end toward the second end, so that the transition channel 13 constitutes a tapered section. By providing the transition channel 13, the transition channel 13 plays a transition role in the flow of the consumable, which can reduce the flow resistance of the consumable flowing down from the throat 5, because the consumable flowing down from the throat 5 has been preheated through the throat 5 on the outside, and the inner core is harder. Therefore, by providing the transition channel 13, the resistance of the hard core flowing into the second sub-channel 112 is reduced, which plays a buffering role in the flow of the consumable, facilitates the consumable to flow into the channel 11, and thus improves the melting efficiency of the consumable.

[0146] Optionally, the transition channel 13 may be made into a conical shape or a chamfered shape.

[0147] As a parallel embodiment, a transition flow channel 13 is provided in the heat conductor 1, and the transition flow channel 13 is connected to the flow channel 11. The transition flow channel 13 includes multiple sections of connected transition sub-flow channels (not shown in the figure); wherein, the cross-sectional area of ​​the transition sub-flow channel at one end of the transition flow channel 13 away from the flow channel 11 is larger than the cross-sectional area of ​​the transition sub-flow channel at the end connected to the flow channel 11, so that the transition flow channel 13 forms multiple sections of stepped transition sub-flow channels, which plays a transition role in the flow of consumables and can reduce the flow resistance of the consumables flowing down from the throat 5.

[0148] Optionally, the transition sub-channel may be provided with two sections, three sections, or more sections.

[0149] As a parallel implementation, a straight hole flow channel with a diameter larger than that of the second sub-flow channel 112 is provided in the heat conducting member 1 , and the straight hole flow channel is connected to the flow channel 11 .

[0150] Of course, in some cases, the transition channel 13 may not be provided in the heat conducting member 1 , that is, the channel 11 is directly connected to the pipe in the throat 5 .

[0151] As an embodiment, the melting component also includes a heating plate, which is attached to the outer surface of the heat conductor 1. By attaching the heating plate to the outside of the heat conductor 1, the temperature of the consumables in the flow channel 11 and the first gap 3 can be controlled separately. At the same time, compared with the heat transfer of the heat conductor 1 through the connector 2, attaching the heating plate to the outer surface of the heat conductor 1 can also improve the heating efficiency and further improve the fluidity of the consumables.

[0152] Optionally, the heating plate may be a ceramic heating plate.

[0153] As shown in FIG. 1 and FIG. 10 , as an embodiment, the melting assembly further includes a nozzle 6 , which is installed at the position of the outlet 15 . By setting the nozzle 6 , the extruded consumable can be guided to flow out, thereby meeting the flow requirements of the consumable.

[0154] Optionally, the nozzle 6 may be made of copper, aluminum or other metals with good thermal conductivity.

[0155] As shown in Figures 1 and 10, as an embodiment, the melting component also includes a throat pipe 5, which is connected to the heat conductor 1, and the flow channel 11 in the throat pipe 5 is connected to the transition flow channel 13, so that the consumables can flow into the flow channel 11 through the throat pipe 5, thereby improving the smoothness of the consumables.

[0156] Optionally, the cross-sectional area of ​​the first sub-channel 111 and the second sub-channel 112 is 4% to 64% of the cross-sectional area of ​​the throat 5, so that when the consumable flows to the second sub-channel 112, since the cross-sectional area of ​​the second sub-channel 112 is smaller than the cross-sectional area of ​​the throat 5, it can peel off the consumable. At the same time, the cross-sectional area of ​​the first sub-channel 111 and the second sub-channel 112 can also be adjusted according to actual needs to improve operational convenience.

[0157] Optionally, the throat pipe 5 and the heat conducting member 1 may be connected by threads or welding.

[0158] As shown in FIG. 16 and FIG. 17 , as an embodiment, a plurality of flow channels 11 are provided, so as to meet the requirement of melting multiple consumables at the same time. In addition, consumables of different colors can be melted in the heat conductor 1 to improve the adaptability of the melting component.

[0159] In summary, the embodiment of the present disclosure proposes a melting component for melting 3D printing consumables, by setting at least one flow channel 11 configured to guide the flow of consumables in the heat conductor 1, and providing a receiving groove 14 configured to accommodate the plug-in component 2 in the heat conductor 1, the receiving groove 14 is connected to the flow channel 11, and the connector 2 and the groove peripheral wall of the receiving groove 14 are provided with a first gap 3 configured to extrude the consumables. When the plug-in component 2 transfers heat to the heat conductor 1, the heat conductor 1 and the connector 2 can heat the consumables in the first gap 3. When the consumables enter the first gap 3 from the flow channel 11, the consumables are heated along the circumference of the first gap 3, increasing the heating area, and are squeezed at the same time. The extruded consumables can melt quickly, thereby improving the melting rate of the consumables by the melting component and meeting the needs of fast printing.

[0160] The disclosed embodiments also provide another more specific heating structure and melting assembly for melting 3D printing consumables. As another embodiment, the melting assembly includes a heating structure, wherein the heating structure's body 200 includes a heat conductor 1 but does not include a connector 2. The gap 212 is formed solely by the inner wall of the body 200.

[0161] As shown in Figures 25 to 31, an embodiment of the present disclosure introduces a melting component for melting 3D printing consumables, which includes a heat conductor 1. The heat conductor 1 is provided with a through-type heating channel 210 configured to convey the consumables. The heating channel 210 has a channel 11 and a gap 212. The channel 11 and the gap 212 are connected in sequence in the conveying direction; wherein the gap 212 has a pair of oppositely arranged walls 2121, the distance between the pair of walls 2121 is less than the diameter of the consumables, and the cross-sectional area of ​​the gap 212 is larger than the cross-sectional area of ​​the consumables.

[0162] In these embodiments, the heating channel 210 passes through the heat-conducting member 1 and has a feed port and a discharge port formed at opposite ends of the heat-conducting member 1. The feed port is connected to the throat 5, and the discharge port is connected to the nozzle 6. In other words, the consumable material passes through the throat 5, the feed port, the heating channel 210, the discharge port, and the nozzle 6 in sequence, and during this process, the consumable material is gradually heated and melted.

[0163] The heating channel 210 has a conveying direction, and the heating channel 210 can be divided into a channel 11 and a gap 212 according to the flow direction of the consumables. The channel 11 is located at the front end of the heating channel 210 and is configured to preliminarily heat the consumables and soften the outer layer of the consumables. The cross-sectional area of ​​the end of the channel 11 near the feed port is relatively large to ensure that the consumables can pass smoothly. The gap 212 is located downstream of the channel 11 and is configured to quickly melt the consumables.

[0164] Furthermore, the distance between a pair of walls 2121 is set to be smaller than the diameter of the consumable, and the pair of walls 2121 are set opposite to each other. The distance between the pair of walls 2121 in the opposite directions is smaller than the diameter of the consumable, and the cross-sectional area of ​​the gap 212 is larger than the cross-sectional area of ​​the consumable. This means that the consumable can be squeezed and dispersed by the wall 2121 during the circulation process in the gap 212, and the contact area between the consumable and the inner wall of the gap 212 is increased, which helps to improve heat transfer and thus speed up the melting speed of the consumable.

[0165] In this embodiment, a through-type heating channel 210 configured to transport consumables is provided in the heat conducting member 1. The heating channel 210 has a channel 11 and a gap 212. The channel 11 and the gap 212 are sequentially connected in the transport direction.

[0166] The heating channel 210 has a conveying direction, and the heating channel 210 can be divided into a channel 11 and a gap 212 according to the flow direction of the consumables.

[0167] In this embodiment, flow channel 11 is located at the front end of heating channel 210 and is configured to initially heat the consumable material, thereby softening the outer layer of the consumable material. The cross-sectional area of ​​flow channel 11 near the feed port is relatively large to ensure smooth passage of the consumable material. Gap 212 is located downstream of flow channel 11 and is configured to quickly melt the consumable material.

[0168] In this embodiment, the gap 212 has a pair of walls 2121 arranged opposite to each other, wherein the pair of walls 2121 includes a first wall 21211 and a second wall 21212, the first wall 21211 is the upper inner wall of the main body 200, and the second wall 21212 is the lower inner wall of the main body 200; the distance formed by the first wall 21211 and the second wall 21212 is smaller than the diameter of the consumable, and the cross-sectional area of ​​the gap 212 is larger than the cross-sectional area of ​​the consumable.

[0169] It can be understood that the distance between the first wall 21211 and the second wall 21212 is set to be smaller than the diameter of the consumable, and the first wall 21211 and the second wall 21212 are set opposite to each other, the distance between the first wall 21211 and the second wall 21212 in the opposite directions is smaller than the diameter of the consumable, and the cross-sectional area of ​​the gap 212 is larger than the cross-sectional area of ​​the consumable, which means that the consumable can be squeezed and dispersed by the first wall 21211 and the second wall 21212 during the circulation process in the gap 212, and the contact area between the consumable and the wall 2121 of the gap 212 is increased, which helps to improve heat transfer and thus speed up the melting speed of the consumable.

[0170] In some optional embodiments, the wall surface 2121 is set to a flat structure, and the corresponding gap 212 is a flat structure. Of course, in other embodiments, the wall surface 2121 can also be set to a curved surface, a wavy surface, etc., and the corresponding gap 212 is a curved surface structure, a wavy surface structure, etc.

[0171] In some optional embodiments, the shape of the planar structure includes at least a circle, an arc, a rectangle, an ellipse, and a rounded prism.

[0172] It is understandable that the larger exposed area of ​​the consumables is conducive to improving the efficiency of heat transfer. In addition, the consumables are squeezed and dispersed through the gap 212, which is conducive to rapid heat conduction to the core of the consumables, thereby improving the melting efficiency. Simply put, a long and flat structure is formed between the wall surfaces, which enables the consumables to be flattened into a sheet after entering the gap 212. Obviously, it can effectively disperse the consumables, facilitate heating of the core of the consumables, and increase the heat conduction area of ​​the consumables, thereby improving the melting efficiency.

[0173] In some optional embodiments, the gap 212 is flat and forms a rectangular channel.

[0174] In some optional embodiments, in a direction perpendicular to the wall surface 2121 , the gap 212 is elliptical, prismatic, polygonal, etc.

[0175] In some optional embodiments, in the conveying direction, the length of the gap 212 perpendicular to the conveying direction changes from small to large and then from large to small; in other words, the middle sections of the two walls 2121 are bent outward. This arrangement can reduce the dead angle of the consumable flow.

[0176] For example, some optional embodiments provide a melting assembly, wherein the heating channel 210 is divided into a channel 11 and a gap 212, and the heat conducting member 1 is made of copper or other high thermal conductivity materials. The heating channel 210 runs through the heat conducting member 1, and the consumables enter from one end and flow out from the other end. The length of the channel 11 is L1, and the diameter is D1. The cross-sectional area of ​​the channel 11 is A1 = π(D1 / 2) 2 The flow channel 11 is primarily configured to preliminarily heat the consumable material, ensuring that it can soften and smoothly enter the gap 212. The cross-section of the gap 212 is rectangular, with a length of L2 and a width of L3. The cross-section of the gap 212 is A2 = L2 x L3. The walls 2121 are arranged sequentially in the width direction, such that L3 is less than D1, L2 is greater than D1, and A2 is greater than A1.

[0177] It is understandable that the design of the gap 212 allows the consumable to be compressed within the gap 212, thereby increasing the contact area between the consumable and the heat-conducting member 1, improving the heat transfer efficiency, and accelerating the melting of the consumable.

[0178] Therefore, through the improved structural design of the melting assembly, the consumable material is subjected to greater pressure within gap 212, compressing the consumable material into a thinner shape. The cross-sectional area of ​​gap 212 is larger than that of the consumable material, increasing the contact area between the consumable material and the thermal conductor 1. This also improves the heat conduction effect on the core of the consumable material, helping to improve heat transfer efficiency, thereby accelerating the melting speed of the consumable material as a whole. This design is particularly suitable for applications requiring high-speed printing, significantly improving printing speed and efficiency.

[0179] As shown in Figure 27, in this embodiment, a flow channel is provided at least at one end of gap 212 to guide the consumable material through heating channel 210. Optionally, a flow channel is provided upstream of gap 212; alternatively, a flow channel is provided downstream of gap 212. Alternatively, flow channels are provided both upstream and downstream of gap 212. Clearly, the purpose of providing the flow channel is to provide flow diversion.

[0180] As shown in Figure 27, in some optional embodiments, as described below, the diversion channel at one end of the gap 212 close to the flow channel 11 is a second diversion portion 214, which is equivalent to providing a second diversion portion 214 at one end of the flow channel 11 close to the gap 212. The second diversion portion 214 is configured to guide the consumables in the flow channel 11 into the gap 212.

[0181] In these embodiments, the second guide portion 214 is intended to guide the consumable material smoothly from the flow channel 11 into the gap 212. In other words, by optimizing the consumable material's flow path, the resistance to the consumable material entering the gap 212 can be reduced, thereby improving the consumable material's fluidity. Furthermore, by ensuring a smooth transition of the consumable material into the gap 212, the consumable material's melting process can be accelerated.

[0182] Optionally, the shape of the second drainage portion 214 can be designed according to specific application requirements. Common shapes include cone, frustum, slope or gradient shape.

[0183] It is understandable that in the design of the melting component, a second drainage portion 214 is provided at one end of the runner 11 close to the gap 212, and the diameter of the runner 11 is slightly larger than the diameter of the consumable to ensure that the consumable can pass smoothly. The runner 11 is configured to preheat the consumable to begin to soften. Among them, the spacing of the gap 212 is smaller than the diameter of the consumable to ensure that the consumable is compressed when passing through the gap 212, and the gap 212 helps to accelerate the melting process of the consumable. The length of the second drainage portion 214 can be determined according to the diameter of the consumable and the difference in spacing between the runner 11 and the gap 212.

[0184] Obviously, before entering the gap 212, the consumable material will first pass through the second guide portion 214, which helps ensure that the consumable material can smoothly transition to the gap 212. The shape and position of the second guide portion 214 can further optimize the flow path of the consumable material, reduce the resistance of the consumable material when entering the gap 212, and thus increase the melting speed of the consumable material.

[0185] As shown in Figure 27, in some optional embodiments, as described below, the guide channel at the end of the gap 212 away from the flow channel 11 is a first guide portion 213, which is equivalent to providing a first guide portion 213 at the end of the gap 212 close to the nozzle 6. The first guide portion 213 is configured to guide the consumables in the gap 212 into the nozzle 6.

[0186] In these embodiments, a first guide portion 213 is provided at one end of the gap 212 near the nozzle 6. This design is intended to better guide the filament from the gap 212 into the nozzle 6 smoothly, thereby ensuring that the filament can be evenly distributed and extruded in the nozzle 6. In other words, by optimizing the flow path of the filament, the resistance of the filament when entering the nozzle 6 can be reduced, the fluidity of the filament can be improved, and the filament can be ensured to smoothly transition to the nozzle 6, thereby ensuring better consistency of the filament during extrusion.

[0187] For example, the shape of the first drainage portion 213 can be designed according to specific application requirements. Common shapes include cone, frustum, slope or gradient shape.

[0188] It is understandable that, through the above design, the filament will first pass through the first guide portion 213 before entering the nozzle 6, which helps to ensure that the filament can smoothly transition to the nozzle 6. The shape and position of the first guide portion 213 can further optimize the flow path of the filament, reduce the resistance of the filament when entering the nozzle 6, and thus improve the extrusion effect of the filament.

[0189] As shown in Figure 27, in some optional embodiments, as described below, a second drainage portion 214 is provided at one end of the flow channel 11 near the gap 212, and the second drainage portion 214 is configured to guide the consumables in the flow channel 11 into the gap 212; a first drainage portion 213 is provided at one end of the gap 212 near the nozzle 6, and the first drainage portion 213 is configured to guide the consumables in the gap 212 into the nozzle 6.

[0190] In these embodiments, the second drainage portion 214 and the first drainage portion 213 are provided simultaneously to achieve the technical effects of the second drainage portion 214 and the first drainage portion 213. Obviously, the flow resistance of the consumables can be further reduced on the basis of providing the second drainage portion 214 and the first drainage portion 213 simultaneously.

[0191] As shown in FIG. 26 and FIG. 27 , in some embodiments, the wall surface 2121 and the extension direction of the flow channel 11 are intersected; the gap 212 formed by the two wall surfaces 2121 intersects with the extension direction of the flow channel 11 and is arranged at a certain angle.

[0192] It is understood that the wall surface 2121 in these embodiments refers to a pair of inner wall surfaces 2121 in the gap 212 configured to squeeze the consumable material. The pair of wall surfaces 2121 includes a first wall surface 21211 and a second wall surface 21212. The first wall surface 21211 is the upper inner wall of the body 200, and the second wall surface 21212 is the lower inner wall of the body 200. The distance between the gap 212 formed by the pair of wall surfaces 2121 is less than the diameter of the consumable material, thereby mechanically squeezing the consumable material as it passes through. Furthermore, the design of the wall surfaces 2121 helps increase the contact area between the consumable material and the thermal conductor 1, thereby accelerating the melting process of the consumable material.

[0193] The extension direction of the wall 2121 intersects with the extension direction of the flow channel 11. This layout can optimize the transition of the consumable from the flow channel 11 to the gap 212. By arranging the wall 2121 and the flow channel 11 to intersect, the flow path of the consumable can be changed when it enters the gap 212, thereby facilitating the dispersion of the consumable, increasing the contact area between the consumable and the thermal conductor 1, and accelerating the melting process of the consumable.

[0194] For example, the flow channel 11 can extend vertically, while the wall 2121 can extend horizontally. This intersecting arrangement helps change the flow path of the consumable, increasing the contact area between the consumable and the thermal conductor 1, thereby increasing the melting speed of the consumable. At the same time, it can reduce the overall length of the melting assembly.

[0195] Of course, in some optional embodiments, the angle between the wall 2121 and the extension direction of the flow channel 11 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc.; then the angle between the gap 212 and the extension direction of the flow channel 11 is correspondingly 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0196] It is worth mentioning that when the gap 212 formed by the two wall surfaces 2121 intersects with the extension direction of the flow channel 11 and is set at a certain angle, a transition design is performed between the gap 212 and the first drainage portion 213 and the second drainage portion 214. The transition design is described below.

[0197] As shown in Figures 27 and 28, in some embodiments, the diversion channel at one end of the gap 212 away from the flow channel 11 is a first diversion portion 213, and the first diversion portion 213 has a first large diameter end and a first small diameter end. The first small diameter end is connected to the nozzle 6, and the first large diameter end is connected to the gap 212.

[0198] It will be understood that the first drainage portion 213 in these embodiments has a first large diameter end and a first small diameter end. The first small diameter end is connected to the nozzle 6, and the first large diameter end is connected to the gap 212. This design helps to guide the consumable to smoothly transition from the gap 212 to the nozzle 6. The first small diameter end is connected to the nozzle 6, and its inner diameter is designed to match the inner diameter of the nozzle 6 to ensure that the consumable can smoothly enter the nozzle 6 from the first drainage portion 213. By ensuring that the inner diameter of the first small diameter end matches the inner diameter of the nozzle 6, the resistance of the consumable when entering the nozzle 6 can be reduced. The first large diameter end of the first drainage portion 213 is connected to the flow channel 11, and the inner diameter of the first large diameter end can be slightly larger than the diameter of the consumable to ensure that the consumable can smoothly transition to the first drainage portion 213.

[0199] Obviously, through the above design, the consumable material will first pass through the first guide portion 213 before entering the nozzle 6, which helps the consumable material to smoothly transition to the nozzle 6. The design of the first large-diameter end and the first small-diameter end of the first guide portion 213 can further optimize the flow path of the consumable material, reduce the resistance of the consumable material when entering the nozzle 6, and thus improve the extrusion effect of the consumable material.

[0200] As shown in Figures 27 and 28, in some embodiments, the diversion channel at one end of the gap 212 close to the flow channel 11 is a second diversion portion 214, and the second diversion portion 214 has a second large diameter end and a second small diameter end. The second small diameter end is connected to the flow channel 11, and the second large diameter end is connected to the gap 212, and the inner diameter of the second small diameter end is not less than the inner diameter of the flow channel 11.

[0201] It is understandable that the second drainage portion 214 in these embodiments helps to optimize the transition of the consumable from the flow channel 11 to the gap 212 and increase the melting rate of the consumable. The second drainage portion 214 has a second large diameter end and a second small diameter end, the second small diameter end is connected to the flow channel 11, and the second large diameter end is connected to the gap 212. The inner diameter of the second small diameter end is not less than the inner diameter of the flow channel 11, which means that the consumable can smoothly transition from the flow channel 11 to the second drainage portion 214, reducing flow resistance. Since the gap 212 is used to squeeze the consumable, the inner diameter of the second large diameter end may be slightly larger than the diameter of the consumable to ensure that the consumable can smoothly transition to the gap 212.

[0202] Obviously, the filament will first pass through the second guide portion 214 before entering the gap 212, which helps ensure that the filament can smoothly transition into the gap 212. The design of the second small diameter end and the second large diameter end of the second guide portion 214 can further optimize the flow path of the filament, reduce the resistance of the filament when entering the gap 212, and thus increase the melting speed of the filament.

[0203] As shown in Figures 27 and 28, in some embodiments, when the flow channel 11 is provided with a second drainage portion 214 and the gap 212 is provided with a first drainage portion 213, the second drainage portion 214 has a second large diameter end and a second small diameter end, the second small diameter end is connected to the flow channel 11, the second large diameter end is connected to the gap 212, and the inner diameter of the second small diameter end is not less than the inner diameter of the flow channel 11; the first drainage portion 213 has a first large diameter end and a first small diameter end, the first small diameter end is connected to the nozzle 6, and the first large diameter end is connected to the gap 212.

[0204] In these embodiments, the second drainage portion 214 and the first drainage portion 213 are provided at the same time, and the specific structures of the second drainage portion 214 and the first drainage portion 213 are disclosed respectively, so as to simultaneously have the technical effects of the second drainage portion 214 and the first drainage portion 213.

[0205] As shown in FIG. 29 and FIG. 30 , in some embodiments, the wall surface 2121 is arranged parallel to the extension direction of the flow channel 11 ; and the gap 212 correspondingly formed by the two wall surfaces 2121 is arranged parallel to the extension direction of the flow channel 11 .

[0206] In these embodiments, the wall 2121 is arranged parallel to the direction in which the flow channel 11 extends to provide another embodiment. This arrangement optimizes the transition of the consumable from the flow channel 11 to the gap 212. By arranging the wall 2121 parallel to the flow channel 11, the speed at which the consumable enters the gap 212 is increased, accelerating the melting process of the consumable.

[0207] For example, the extension direction of the flow channel 11 and the gap 212 can both be horizontal, and the extension direction of the wall 2121 is also horizontal and parallel to the flow channel 11 .

[0208] It is worth mentioning that when the gap 212 formed by the two walls 2121 is arranged parallel to the extension direction of the flow channel 11, a transition design is performed between the gap 212 and the first drainage portion 213 and the second drainage portion 214. The transition design is described below.

[0209] As shown in Figures 29 and 30, in some embodiments, the guide channel at one end of the gap 212 away from the flow channel 11 is a first guide portion 213, and the heating flow channel 210 is formed with an outlet 15 on the heat conductor 1, and the outlet 15 is configured to install the nozzle 6; the first guide portion 213 is extended along the extension direction of the outlet 15, and the inner diameter of the first guide portion 213 is not less than the inner diameter of the outlet 15, and the inner wall of the first guide portion 213 has a first connecting port 2131, and the first connecting port 2131 is extended along the extension direction of the first guide portion 213, and the first connecting port 2131 is connected to the gap 212.

[0210] In these embodiments, the first drainage portion 213 is extended along the extension direction of the outlet 15, which is consistent with the flow direction of the consumables. The inner diameter of the first drainage portion 213 is not less than the inner diameter of the nozzle 6, which means that the consumables can smoothly transition from the gap 212 to the first drainage portion 213. By ensuring that the inner diameter of the first drainage portion 213 is large enough, the resistance of the consumables when entering the first drainage portion 213 can be reduced. The first connecting port 2131 is provided on the inner wall of the first drainage portion 213 and extends along the extension direction of the nozzle 6 installed at the outlet 15. The first connecting port 2131 is connected to the gap 212, which means that the consumables can smoothly transition from the first drainage portion 213 to the nozzle 6.

[0211] It is understandable that, through the above design, the consumable material will first pass through the first guide portion 213 before entering the nozzle 6, which helps to ensure that the consumable material can smoothly transition to the nozzle 6. The design of the inner diameter of the first guide portion 213 and the first connecting port 2131 can further optimize the flow path of the consumable material, reduce the resistance of the consumable material when entering the nozzle 6, and thus improve the extrusion effect of the consumable material.

[0212] In some embodiments, the diversion channel at one end of the gap 212 close to the flow channel 11 is a second diversion portion 214, the second diversion portion 214 is extended along the extension direction of the flow channel 11, and the inner diameter of the second diversion portion 214 is not less than the inner diameter of the flow channel 11, the inner wall of the second diversion portion 214 has a second connecting port 2141, the second connecting port 2141 is extended along the extension direction of the flow channel 11, and the second connecting port 2141 is connected to the gap 212.

[0213] In these embodiments, the second drainage portion 214 extends along the direction of flow channel 11, which aligns with the flow direction of the consumables. The inner diameter of the second drainage portion 214 is no smaller than the inner diameter of the flow channel 11, which means that the consumables can smoothly transition from the flow channel 11 to the second drainage portion 214. By ensuring that the inner diameter of the second drainage portion 214 is sufficiently large, the resistance of the consumables entering the second drainage portion 214 can be reduced.

[0214] The second connection port 2141 is provided on the inner wall of the second drainage portion 214 and extends along the extension direction of the flow channel 11. The second connection port 2141 is connected to the gap 212, which means that the consumables can smoothly transition from the second drainage portion 214 to the gap 212.

[0215] Through the above design, the consumable material will first pass through the second guide portion 214 before entering the gap 212, which helps ensure that the consumable material can smoothly transition into the gap 212. The design of the inner diameter of the second guide portion 214 and the second connecting port 2141 can further optimize the flow path of the consumable material, reduce the resistance of the consumable material when entering the gap 212, and thus increase the melting speed of the consumable material.

[0216] As shown in Figures 29 and 30, in some embodiments, the guide channel at one end of the gap 212 away from the flow channel 11 is a first guide portion 213, and the guide channel at one end of the gap 212 close to the flow channel 11 is a second guide portion 214. The second guide portion 214 is extended along the extension direction of the flow channel 11, and the inner diameter of the second guide portion 214 is not less than the inner diameter of the flow channel 11. The inner wall of the second guide portion 214 has a second connecting port 2141, and the second connecting port 2141 is extended along the extension direction of the flow channel 11. The heating channel 210 is provided with an outlet 15 on the heat-conducting member 1, and the first guide portion 213 is extended along the extension direction of the outlet 15, and the inner diameter of the first guide portion 213 is not less than the inner diameter of the outlet 15, and the inner wall of the first guide portion 213 has a first connecting port 2131, which is extended along the extension direction of the first guide portion 213, and the first connecting port 2131 is connected to the channel 11.

[0217] In these embodiments, the difference from the above embodiments is that the present application is provided with a second drainage portion 214 and a first drainage portion 213 at the same time, and the specific structures of the second drainage portion 214 and the first drainage portion 213 are disclosed respectively, so as to have the above technical effects at the same time.

[0218] In some embodiments, in the conveying direction, the flow channel 11 has a guide section and a stripping section connected in sequence, and the stripping section is connected to the gap 212; wherein the cross-sectional area of ​​the guide section gradually decreases in the conveying direction.

[0219] In some optional embodiments, the structure of the guide section facilitates the flow of consumables, thereby facilitating their entry into the stripping section. For example, the guide section is configured as a conical structure, and the stripping section is configured as a constant diameter structure. Of course, in other embodiments, the guide section may also have a stepped hole structure, which is not specifically limited here.

[0220] As shown in Figures 30 and 31, in some embodiments, the inner wall of the flow channel 11 has a plurality of protrusions 220, and the plurality of protrusions 220 are arranged at intervals along the circumference of the heating flow channel 210, and the protrusions 220 extend along the conveying direction; wherein, a first sub-flow channel 111 is formed between adjacent protrusions 220, and a second sub-flow channel 112 is formed between the ends of all the protrusions 220 facing away from the inner wall of the flow channel 11.

[0221] In some embodiments, in the direction in which the second sub-channel 112 approaches the gap 212, the cross-sectional area of ​​the second sub-channel 112 gradually decreases, the minimum cross-sectional area of ​​the second sub-channel 112 is smaller than the cross-sectional area of ​​the consumable, and the maximum cross-sectional area of ​​the second sub-channel 112 is larger than the cross-sectional area of ​​the consumable.

[0222] It can be understood that in these embodiments, in the conveying direction, after the consumable enters the heating channel 210, the outer layer of the softened consumable can be quickly squeezed toward the first sub-channel 111 between adjacent protrusions 220 under the extrusion action of the protrusions 23 and 220 and flows along the conveying direction, and the second sub-channel 112 is configured as the core of the conveying consumable.

[0223] At the same time, the protrusion 220 gradually penetrates into the consumable material and approaches the core to increase the heat conduction contact area, and can directly conduct heat to the core of the consumable material, thereby quickly heating and melting the inside of the consumable material. The outer layer of the softened consumable material is squeezed into the gap 212 between adjacent protrusions 220 and continues to be heated and melted. Obviously, the softened part of the consumable material can be quickly peeled off in the process of passing through the flow channel 11, which plays a preheating role and can quickly heat the core of the consumable material. The protrusion 220 also increases the contact area between the consumable material and the heat conductor 1, which helps to improve the heat conduction efficiency. Therefore, the present application can increase the melting speed of the consumable material to meet the requirements of high-speed printing.

[0224] These embodiments differ from the above-described embodiments in that the cross-sectional area of ​​the first sub-channel 111 is larger than that of the second sub-channel 112. The larger cross-sectional area of ​​the first sub-channel 111 allows the consumable to flow more freely between the protrusions 220, helping to heat the consumable more evenly and reducing the flow resistance of the stripped portion of the consumable. This ensures that the preheated stripped consumable can smoothly enter the gap 212, improving the stripping efficiency of the consumable. The smaller cross-sectional area of ​​the second sub-channel 112, which serves as the flow path for the core of the consumable, facilitates closer access to the inner core of the consumable, thereby accelerating the melting of the inner core.

[0225] In some optional embodiments, the cross-section of the first sub-channel 111 is circular. Of course, in other embodiments, the cross-section of the first sub-channel 111 can also be shaped like a five-pointed star, a triangular star, an ellipse, etc.

[0226] As shown in Figures 25 and 26, in some embodiments, the melting assembly further includes a throat 5 and a nozzle 6, which are respectively connected to the heat conductor 1, the throat 5 is connected to the flow channel 11, the nozzle 6 is connected to the gap 212, and the throat 5 and the nozzle 6 are staggered.

[0227] In these embodiments, the throat 5 is a pipe connecting the heat conductor 1 with other components, usually a narrow part, and its function is to guide the consumables into the heating channel 210 of the heat conductor 1. The heat conductor 1 is configured to heat the material and melt it for easy extrusion. The nozzle 6 is where the material is finally extruded and determines the shape and size of the extrudate. The flow channel 11 is the part where the consumable begins to be heated but has not yet completely melted. The gap 212 is where the consumable needs to melt quickly and be ready for extrusion. The gap 212 is connected to the nozzle 6, which means that at this stage, the material is very close to its molten state and is ready to be extruded. Among them, the throat 5 and the nozzle 6 are staggered, which means that they are not in the same straight line in space. This layout can be to optimize the material flow path, reduce the overall length of the melting component, and help improve the torque resistance of the melting component.

[0228] Obviously, such a melting component design is intended to improve the melting efficiency and structural strength of the material.

[0229] As shown in Figures 25 and 26, in some optional embodiments, the throat 5, flow channel 11, and nozzle 6 extend in the same direction, and the gap 212 is perpendicular to the flow channel 11. In these embodiments, the above-described arrangement of the throat 5, flow channel 11, gap 212, and nozzle 6 can further reduce the length of the melting assembly; this significantly improves the structural strength of the melting assembly.

[0230] Of course, in other embodiments, the gap 212 and the flow channel 11 may be arranged to intersect, and the angle between the gap 212 and the flow channel 11 may be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0231] It is worth noting that the flow channel 11 in the heat conducting member 1 and the gap 212 in the heat conducting member 1, the first connecting flow channel 12 in the heat conducting member 1 and the second drainage portion 214 in the heat conducting member 1, and the second connecting flow channel 16 in the heat conducting member 1 and the first drainage portion 213 in the heat conducting member 1 can all adopt the same setting.

[0232] The embodiment of the present disclosure proposes a melting component for melting 3D printing consumables. By setting a gap 212 in the heat-conducting part 1, when the consumable flows from the flow channel 11 into the gap 212, the gap 212 can squeeze and heat the consumable, and at the same time, the consumable flows along the circumference of the gap 212. The consumable is subjected to greater pressure in the gap 212, so that the consumable is compressed into a thinner shape. The cross-sectional area of ​​the gap 212 is larger than the cross-sectional area of ​​the consumable, which increases the contact area between the consumable and the heat-conducting part 1; and it can improve the heat conduction effect on the core of the consumable, which helps to improve the heat transfer efficiency, thereby accelerating the melting speed of the consumable as a whole. This design is particularly suitable for application scenarios that require high-speed printing and can significantly improve printing speed and efficiency.

[0233] The heating structure proposed in the embodiment of the present disclosure also discloses a comparative ratio of the gap 212 and the flow channel 11, as shown in Table 1 below.

[0234] Table 1 Comparative example of gap 212 and flow channel 11

[0235] The spacing of the gap 212 can be understood as the distance between the two wall surfaces 2121 ; and the tableting coefficient can be understood as the ratio of the spacing 212 of the gap 212 to the diameter of the flow channel 11 .

[0236] Comparative Examples 1-4 are the melting components of the present disclosure as shown in FIG6 , and Comparative Example 5 is the prior art melting component as shown in FIG32 . Accordingly, the prior art melting component, as shown in FIG32 , includes a heating structure, a throat 5 , and a nozzle. The heating structure body 200 includes a columnar flow channel 113 ; the throat 5 is connected to the heating structure via the columnar flow channel 113 ; and the nozzle is connected to the heating structure via the columnar flow channel 113 .

[0237] The higher the outlet temperature, the greater the heating efficiency of the consumables. The inlet pressure represents the resistance and difficulty of the consumables being pushed into the flow channel 11 by external force. The higher the pressure, the greater the resistance the consumables encounter at the inlet, which will affect the advancement speed.

[0238] It can be understood that when the inlet pressure does not change much, the smaller the width of the gap 212, the shorter the heat conduction distance between the center of the consumable and the heat conductor 1. It can be seen that after the consumable is squeezed by the gap 212, the melting rate of the consumable can be increased; at the same time, the outlet temperature can reflect the heating efficiency of the heat conductor 1 on the consumable, and the higher the outlet temperature, the greater the heating efficiency of the consumable.

[0239] Among them, the melting assembly disclosed in the prior art No. 5 has a heating structure with only a columnar flow channel 113, so there is no gap 212 and a tableting coefficient.

[0240] As shown in Table 1, with the diameters of flow channel 11 and columnar flow channel 113 unchanged, the temperature and contact area at outlet 15 of consumable in No. 5 are much lower than those in Nos. 2-4, and the inlet pressure of the heating structure is minimally affected. Furthermore, the outlet temperatures of Nos. 2-4 are significantly higher than those of No. 5, indirectly reflecting the exponential increase in consumable heating efficiency. Therefore, it can be seen that the melting assembly proposed in this embodiment significantly improves the melting efficiency of the consumable by providing gap 212.

[0241] Furthermore, while the diameters of the flow channel 11 and the columnar flow channel 113 remain unchanged, a gap 212 is provided in sequence number 1, and the spacing of the gap 212 is 0.2. It can be seen that the outlet temperature and contact area of ​​sequence number 1 are improved compared to sequence number 5. At the same time, compared to sequence numbers 2-4, the gap 212 of sequence number 1 is smaller than the gap 212 of spacing 2-4. Since the gap 212 of sequence number 1 is too small, the inlet pressure of sequence number 1 is too high, which will lead to a large propulsion resistance of the consumable as a whole and poor fluidity. Therefore, it can be seen that although setting the gap 212 can improve the heating efficiency of the consumable, setting the gap 212 too small will lead to excessive inlet pressure, that is, poor fluidity of the consumable as a whole.

[0242] In some optional embodiments, the spacing of the gap 212 ranges from 0.2 to 1.75 mm, the diameter of the flow channel 11 ranges from 2 to 3 mm, and the ratio coefficient of the tableting coefficient ranges from 0.1 to 0.75.

[0243] It can be further seen from Table 1 that the compression coefficient of No. 1 is 0.1, and the compression coefficient of No. 2 is 0.25. The outlet temperatures of the two do not change much, while the inlet pressure of No. 1 is much greater than that of No. 2, that is, the resistance encountered by the consumables in No. 2 is smaller than that in No. 1.

[0244] At the same time, the tableting coefficient of No. 2 is 0.25, and the tableting coefficient of No. 3 is 0.5. The inlet pressure of the two does not change much. Compared with No. 5, the outlet temperature of No. 2 has increased exponentially, which indirectly reflects the exponential increase in heating efficiency. The contact area of ​​the consumables has expanded by basically four times, and the maximum heat conduction distance of the consumables has been shortened by four times. The heating and melting efficiency of the consumables has been greatly improved.

[0245] Therefore, it can be seen that setting the ratio coefficient of the pressing coefficient between 0.2 and 0.75 can significantly improve the heating and melting efficiency of the consumables, which is conducive to increasing the printing speed. Optionally, the ratio coefficient of the pressing coefficient can be 0.2, 0.25, 0.3, 0.4...0.6, 0.65, 0.7, 0.75, etc.

[0246] In summary, the heating structure and melting assembly for melting 3D printing consumables disclosed in the embodiments of the present disclosure can, by setting the gap 212, increase the flow distance of the consumables in the main body 200, that is, increase the heating time; on the other hand, the heat conductor 1 squeezes the consumables through the gap 212, which can reduce the thermal contact distance of the consumable axis; at the same time, setting the gap 212 can also increase the thermal contact area of ​​the consumables compared to the linear flow channel, which is beneficial to improving the melting rate of the consumables.

[0247] Among them, the gap 212 is surrounded by the inner wall of the heat conductor 1 and the outer wall of the connector 2, thus forming an annular or semi-annular gap surface, etc. The annular or semi-annular gap surface can provide a larger thermal contact surface for the consumables than the planar gap surface. The gap 212 is arranged in the horizontal direction, that is, it intersects perpendicularly with the axis of the flow channel 11 and the outlet 15, which is conducive to controlling the overall length of the melting component, thereby helping to control the stability of the melting component during the printing process. The gap 212 cooperates with the multi-channel preheating flow channel 11 to peel off the outer surface of the consumable, so as to achieve separate preheating of the inner core, reduce the influence of the material on the outer surface of the consumable on the heating of the inner core, improve the heating effect of the heat conductor 1 on the consumables, improve the heating efficiency of the consumables, and further improve the overall melting speed of the consumables. The setting of the auxiliary transition flow channel 13 and the drainage portion can make the flow of the consumables in the heating structure smoother and reduce the resistance of the consumables through the heating structure.

[0248] The foregoing description is merely an embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and altered in various ways. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

[0249] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

[0250] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element. Industrial Applicability

[0251] Through the technical solution disclosed in the present invention, by setting the gap, on the one hand, the flow distance of the consumables in the body can be increased, that is, the heating time can be increased; on the other hand, the heat conductor squeezes the consumables through the gap, which can reduce the thermal contact distance of the consumable axis. At the same time, the gap can also increase the thermal contact area of ​​the consumables compared to the linear flow channel, which is beneficial to increasing the melting rate of the consumables and meeting the needs of fast printing.

Claims

1. A melting assembly for melting 3D printing consumables, characterized in that: include: A heat conducting member, wherein at least one flow channel configured to guide consumables is provided in the heat conducting member, and a receiving groove is also provided in the heat conducting member, and the receiving groove is connected to the flow channel; A plug-in connector, disposed in the receiving groove and connected to the heat-conducting member; Wherein, a first gap configured to extrude consumables is provided between at least a portion of the connector and the peripheral wall of the accommodating groove.

2. The melting assembly according to claim 1, characterized in that The heat conducting member is further provided with an outlet configured to guide the extruded consumable to flow out, and the axis of the outlet and the axis of the flow channel are arranged to be offset from each other, or; The axis of the outlet is coaxially arranged with the axis of the flow channel.

3. The melting assembly according to claim 2, characterized in that: The axis of the containing groove is arranged at an angle to the axis of the flow channel.

4. The melting assembly according to any one of claims 1 to 3, characterized in that: The plug-in connector includes an insertion section configured to be inserted into the receiving groove, and the gap is formed between at least a portion of the insertion section and a groove wall of the receiving groove; The insertion section abuts against one end of the receiving groove; or a distance is left between the insertion section and one end of the receiving groove.

5. The melting assembly according to any one of claims 1 to 4, characterized in that: The flow channel includes at least two first sub-flow channels and one second sub-flow channel, wherein the first sub-flow channels are arranged along the circumference of the second sub-flow channel, A cross-sectional area of ​​the second sub-flow channel is smaller than a cross-sectional area of ​​the first sub-flow channel.

6. The melting assembly according to claim 5, characterized in that The first sub-channel is communicated with the second sub-channel.

7. The melting assembly according to any one of claims 1 to 6, characterized in that: The melting assembly also includes a heating plate, which is attached to the outer surface of the heat conducting member.

8. The melting assembly according to any one of claims 1 to 7, characterized in that: The number of the flow channels is plural.

9. The melting assembly according to any one of claims 2 to 8, characterized in that The plug-in connector is a heating rod.

10. A melting assembly, characterized in that: The melting assembly comprises: A heat conducting member, wherein the heat conducting member is provided with a through-type heating channel for conveying consumables, wherein the heating channel comprises a preheating channel and a channel, and the preheating channel and the channel are sequentially connected and arranged in a conveying direction; The flow channel has a pair of wall surfaces that are arranged opposite to each other, the distance between the pair of wall surfaces is smaller than the diameter of the consumable, and the cross-sectional area of ​​the flow channel is larger than the cross-sectional area of ​​the consumable.

11. The melting assembly according to claim 10, characterized in that At least one end of the flow channel is provided with a flow guide channel, and the flow guide channel is used to guide the consumables to pass through the heating flow channel.

12. The melting assembly according to claim 10 or 11, characterized in that: The wall surface and the extension direction of the preheating channel are arranged to intersect.

13. The melting assembly according to claim 10 or 11, characterized in that: The wall surface and the extension direction of the preheating channel are arranged in parallel.

14. The melting assembly according to any one of claims 10 to 13, characterized in that In the conveying direction, the preheating channel has a guide section and a stripping section connected in sequence, and the stripping section is communicated with the channel; wherein the cross-sectional area of ​​the guide section gradually decreases in the conveying direction.

15. The melting assembly according to claim 14, characterized in that The inner wall of the preheating channel has a plurality of convex portions, the plurality of convex portions are arranged at intervals along the circumference of the preheating channel, and the convex portions are extended along the conveying direction, a first sub-channel is formed between adjacent convex portions, and a second sub-channel is formed between ends of all the convex portions away from the inner wall of the preheating channel, and the cross-sectional area of ​​the second sub-channel gradually decreases; The minimum cross-sectional area of ​​the second sub-channel is smaller than the cross-sectional area of ​​the consumable, and / or the cross-sectional area of ​​the first sub-channel is larger than the cross-sectional area of ​​the second sub-channel.

16. A heating structure for melting 3D printing consumables, characterized in that: include: Body, flow channel, gap, outlet; The flow channel, gap and outlet are all arranged inside the body and are connected in sequence; The gap spacing is smaller than the diameter of the consumables. The consumables enter the body through the flow channel, are squeezed into sheets at the gap, and flow out of the body from the outlet.

17. The heating structure according to claim 16, characterized in that: The gap includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface are formed by the inner wall of the body.

18. The heating structure according to claim 17, characterized in that: The body comprises a heat conducting member and a plug-in member, the heat conducting member has a receiving groove, the plug-in member is inserted into the receiving groove and is sealedly connected to the heat conducting member, and the first wall surface and the second wall surface are formed by the inner wall of the receiving groove and the outer wall of the plug-in member.

19. The heating structure according to claim 17 or 18, characterized in that: The distance between the first wall surface and the second wall surface is 0.2 to 0.75 times of the diameter of the consumable.

20. The heating structure according to any one of claims 16 to 19, characterized in that: At least a part of the first wall surface and the second wall surface is a rectangular plane, an elliptical plane, a rounded prism plane, a polygonal plane, a torus, or a semi-torus.

21. The heating structure according to claim 20, characterized in that The first wall surface and the second wall surface are rounded prism-shaped planes, and the flow channel and the outlet are respectively located at the diagonals of the rounded prism-shaped planes and are perpendicular to the rounded prism-shaped planes.

22. The heating structure according to any one of claims 16 to 21, characterized in that: The heating structure further includes a drainage portion, and the drainage portion is arranged between the flow channel and the gap; And / or the drainage portion is arranged between the gap and the outlet.

23. The heating structure according to any one of claims 16 to 22, characterized in that: The flow channel preheats the consumables, and the flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel is connected to the second sub-flow channel, and the first sub-flow channel is arranged along the circumference of the second sub-flow channel.

24. The heating structure according to claim 23, characterized in that The flow channel also includes a transition flow channel, the first sub-flow channel and the second sub-flow channel are both connected to the transition flow channel, and consumables enter the first sub-flow channel and the second sub-flow channel from the transition flow channel.

25. A melting assembly for melting 3D printing consumables, characterized in that: The melting component includes the heating structure described in any one of claims 16-24, and also includes a throat and a nozzle; the throat is connected to the body through the flow channel; the nozzle is connected to the outlet and connected to the body.

26. A 3D printer, characterized in that: include: The melting assembly according to any one of claims 1 to 5; or the melting assembly according to any one of claims 10 to 15; Or the melting assembly described in claim 25.

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