Consumable melting assembly for 3D printer, nozzle and 3D printer

Abstract

The utility model provides a consumable melting assembly for a 3D printer, a nozzle and the 3D printer, the consumable melting assembly comprises a heating body, and a first heating runner and a second heating runner are arranged in the heating body in the axial direction of the heating body; the second heating runner is arranged in the first heating runner, the second heating runner is in an inverted cone shape in the direction from a consumable inlet to a consumable outlet, a melting runner is formed between the outer wall of the second heating runner and the inner wall of the first heating runner, a plurality of through holes are formed in the second heating runner, and the through holes are communicated with the melting runner. And the second heating runner is communicated with the melting runner through the through hole. The resistance of the consumable passing through the flow channel is reduced, the distance between the consumable melting assembly and the inner core of the consumable is shortened, the inner core of the consumable can be quickly melted, the problem that the nozzle is blocked is effectively avoided, and meanwhile the stability of the outlet flow of the nozzle and the printing speed of the 3D printer are effectively improved.

Description

Technical Field

[0001] The present application belongs to the technical field of 3D printers and relates to a consumable material melting component, a nozzle and a 3D printer for a 3D printer. Background Art

[0002] 3D printing does not subtract material to create parts like traditional machining, but rather creates parts by adding material. Parts are manufactured using a 3D printer based on a digital model. The 3D printer melts the filament and extrude it from the printer nozzle. After the melted filament leaves the printer nozzle, it becomes solid, thus achieving 3D printing of the part.

[0003] When existing nozzles melt filament, the core is relatively far from the heat source, so it takes a long time to completely melt the filament. Due to the high resistance generated by the filament passing through the nozzle's heat-conducting material, the core of the filament may not be fully melted during fast printing, causing the nozzle to easily clog, resulting in poor flow stability at the nozzle and slow printing speeds. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a consumable material melting assembly, a nozzle and a 3D printer for a 3D printer, so as to quickly melt the inner core of the consumable material and solve the technical problem that the nozzle is prone to clogging.

[0005] In the first aspect, the present application provides a consumable material melting assembly for a 3D printer, comprising: a heating body, wherein a first heating channel and a second heating channel are respectively provided inside the body along its axial direction; the second heating channel is arranged in the first heating channel, and the second heating channel is in an inverted cone shape from the consumable inlet to the outlet, and a melting channel is formed between the outer wall of the second heating channel and the inner wall of the first heating channel, and a plurality of through holes are provided on the second heating channel, and the second heating channel is connected to the melting channel through the through holes.

[0006] In one embodiment of the present application, the second heating channel includes a preheating channel and a stripping channel; the first heating channel includes a tubular channel and a funnel-shaped channel; the stripping channel is arranged in the first heating channel, and each of the through holes is arranged along the stripping channel, and the gap between the outer wall of the stripping channel and the inner wall of the first heating channel constitutes the melting channel.

[0007] In one embodiment of the present application, a plurality of the through holes are distributed on the second heating channel.

[0008] In one embodiment of the present application, at least one through hole is provided on the circumference at the same height along the second heating channel, and the through holes are arranged in an alternating manner along the second heating channel, or the through holes are evenly arranged along the circumference at the same height.

[0009] In one embodiment of the present application, the apertures of the through holes distributed along the second heating channel are equal, or the apertures of the through holes along the second heating channel consumable from the inlet to the outlet decrease successively; the through holes are square holes, circular holes or polygonal holes.

[0010] In one embodiment of the present application, at least one reinforcing rib is further included, and each of the reinforcing ribs is evenly distributed in the melting flow channel. One side of the reinforcing rib is fixed to the inner wall of the first heating flow channel, and the other side is fixed to the outer wall of the second heating flow channel.

[0011] In one embodiment of the present application, at least two of the reinforcing rib, the second heating channel, and the first heating channel are integrally formed.

[0012] In a second aspect, the present application provides a nozzle for a 3D printer, comprising the consumable melting assembly for the 3D printer provided in the first aspect, a throat assembly, and a nozzle assembly; the throat assembly is through-connected to the inlet of the consumable melting assembly, and the nozzle assembly is through-connected to the outlet of the consumable melting assembly, so that the consumable enters the consumable melting assembly from the throat assembly, and the melted consumable is ejected from the nozzle assembly.

[0013] In one embodiment of the present application, the throat pipe assembly includes a heat sink located at the top, a connecting piece located at the bottom, and a throat pipe connecting the heat sink and the connecting piece; an upper groove is formed at the heating body at the inlet end of the consumable melting assembly, and the connecting piece is fixed in the upper groove; the heat sink, the throat pipe, the connecting piece, and the bottom of the upper groove are respectively formed with a through cavity that passes through the second heating flow channel along the axial direction of the second heating flow channel, and the throat pipe is respectively connected to the heat sink and the connecting piece by interference fit.

[0014] In one embodiment of the present application, a limiting portion is provided at one end of the connecting member close to the heat sink, and when the connecting member is fixed in the upper groove, the limiting portion clamps the top surface of the heating body; the through cavity inside the connecting member includes a first through cavity and a second through cavity, wherein the first through cavity is connected to the throat by an interference fit, and the cross-sectional area of ​​the second through cavity is less than or equal to the cross-sectional area of ​​the throat.

[0015] In one embodiment of the present application, a lower groove is formed at the heating body at the outlet end of the consumable melting assembly, and the lower groove is connected to the bottom of the second heating channel. One end of the nozzle assembly is fixed in the lower groove, and the other end of the nozzle assembly sprays the consumable, and an ejection channel is formed inside the nozzle assembly along its axial direction and is connected to the first heating channel.

[0016] In a third aspect, the present application provides a 3D printer, comprising the nozzle for a 3D printer provided in the second aspect.

[0017] The technical solution of this application has the following effects:

[0018] The consumable melting assembly for melting the consumable in the present application includes a first heating channel and a second heating channel arranged in the heating body. The second heating channel is in an inverted cone shape from the consumable inlet to the outlet, and a melting channel is formed between the second heating channel and the first heating channel. The second heating channel is provided with multiple through holes. When the consumable passes through the second heating channel, the consumable body is heated and softened in the second heating channel, and the outer layer of the consumable is continuously peeled off. The peeled consumable enters the melting channel through the through holes and melts, reducing the resistance of the consumable through the channel, and shortening the distance between the consumable melting assembly and the inner core of the consumable, so that the inner core of the consumable can be quickly melted, effectively avoiding the problem of nozzle blockage, and at the same time effectively improving the stability of the nozzle outlet flow and the printing speed of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Shown is a schematic structural diagram of a consumable material melting assembly for a 3D printer provided by the present application in one embodiment.

[0021] Figure 2 Shown is a three-dimensional perspective structural diagram of a consumable material melting assembly for a 3D printer provided by the present application in one embodiment.

[0022] Figure 3 Shown is a schematic three-dimensional cross-sectional structure diagram of a consumable material melting assembly for a 3D printer provided by the present application in one embodiment.

[0023] Figure 4 Shown is a cross-sectional view of a consumable material melting assembly for a 3D printer provided by the present application in one embodiment.

[0024] Figure 5 Display as Figure 4 Schematic diagram of the cross-sectional structure in the CC direction.

[0025] Figure 6 Display as Figure 4 Schematic diagram of the cross-sectional structure in the DD direction.

[0026] Figure 7 The diagram shows a cross-sectional structure of a consumable material melting assembly for a 3D printer provided by the present application having another through hole in one embodiment.

[0027] Figure 8 Shown is a top view of the heating body structure of a consumable material melting assembly for a 3D printer provided by the present application in one embodiment.

[0028] Figure 9 Shown is a schematic cross-sectional structure diagram of a nozzle for a 3D printer provided by the present application in one embodiment.

[0029] Figure 10 Shown is a front view schematic diagram of the structure of a nozzle for a 3D printer provided by the present application in one embodiment.

[0030] Figure 11 Shown is a three-dimensional perspective structural diagram of a throat assembly of a nozzle for a 3D printer provided by the present application in one embodiment.

[0031] Figure 12 Shown is a top view of the throat component structure of a nozzle for a 3D printer provided by the present application in one embodiment.

[0032] Figure 13 A side view showing a throat component structure of a nozzle for a 3D printer provided by the present application in one embodiment is shown.

[0033] Figure 14 A side view showing another perspective of the throat component structure of a nozzle for a 3D printer in one embodiment provided by the present application is shown.

[0034] Figure 15 Shown is a three-dimensional perspective structural diagram of a connector in a throat assembly of a nozzle for a 3D printer provided by the present application in one embodiment.

[0035] Figure 16 Shown is a side view of a connector structure in a throat assembly of a nozzle for a 3D printer provided by the present application in one embodiment.

[0036] Figure 17 Shown is a three-dimensional perspective structural diagram of a nozzle assembly of a 3D printer provided by the present application in one embodiment.

[0037] Figure 18 Shown is a side view of the nozzle assembly structure of a nozzle for a 3D printer provided by the present application in one embodiment.

[0038] Component number description

[0039] 1 Consumables melting assembly

[0040] 11 Heating element

[0041] 111 First heating channel

[0042] 1111 Tubular flow channel

[0043] 1112 Funnel-shaped flow channel

[0044] 112 Second heating channel

[0045] 1121 through hole

[0046] 1121a1, 1121a2 through holes in the first row

[0047] 1121b1, 1121b2 through holes in the second row

[0048] 1121c1, 1121c2 through holes in the third row

[0049] 1121d1 Through hole in the fourth column

[0050] 1122 Preheating Channel

[0051] 1123 Stripping channel

[0052] 113 Melt Channel

[0053] 114 reinforcement

[0054] 115 upper groove

[0055] 116 lower groove

[0056] 2. Hose assembly

[0057] 21 heat sink

[0058] 22 throat

[0059] 23 Connectors

[0060] 231 First through cavity

[0061] 232 Second through cavity

[0062] 233 Limiting part

[0063] 2331 assembly surface

[0064] 3 Nozzle assembly

[0065] 31 Nozzle body

[0066] 311 First ejection channel

[0067] 312 Second ejection channel

[0068] 313 Nozzle

[0069] 32 Installation

[0070] 4 Consumables

[0071] 41 Side wall of the first direction of the consumables

[0072] 42 Second direction side wall of consumables

[0073] 43 Third side wall of consumables

[0074] 44 Consumables fourth direction side wall DETAILED DESCRIPTION

[0075] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the information disclosed in this application. The present application can also be implemented or applied through different specific embodiments. The details in this application can also be modified or changed according to different viewpoints and application modules without departing from the spirit of this application. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless they conflict.

[0076] Below Figure 1 and Figure 18 For reference, the embodiments of the present application are described in detail so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0077] Throughout the present application, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or a group of embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, as described herein, without conflicting opinions.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include at least one such feature. In the present application, "a group" means two or more, unless otherwise specifically defined.

[0079] Although in some examples the terms first, second, etc. are used in this application to represent various structural features, these structural features should not be limited by these terms. These terms are only used to distinguish one structural feature from another structural feature. Furthermore, as used in this embodiment, the singular forms "one", "an", and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the presence of the structural features described, but do not exclude the presence, occurrence, or addition of one or a group of other structural features. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition will only occur when the combination of structural features is inherently mutually exclusive in some way.

[0080] In order to clearly describe the present application, structures not related to the description are omitted, and the same or similar structures throughout the specification are given the same reference numerals.

[0081] Throughout the description of the specific embodiments, when a structure is said to be "connected" to another structure, this includes not only "direct connection" but also "indirect connection" by placing other structural elements therebetween. Furthermore, when a structure is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the structure may include other components.

[0082] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit this application. The singular form used herein also includes the plural form, unless the statement explicitly indicates otherwise. The use of "include" in this specification is intended to specify specific features and structural elements and does not exclude the existence or addition of other features and structural elements.

[0083] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the current information provided. Unless otherwise defined, they should not be overly interpreted as ideal or highly formal meanings.

[0084] A 3D printer is a device that can directly create three-dimensional objects based on a digital model. It builds objects by printing materials layer by layer. The 3D printer described in the embodiments of this application is a 3D printer that requires heating and melting consumables.

[0085] The consumables used for melting described in the embodiments of the present application are also called wires or filaments. The types of materials of the consumables melted in the embodiments of the present application include but are not limited to polylactic acid (PLA) consumables, ABS (acrylonitrile butadiene styrene) consumables, nylon consumables, PETG (polyethylene terephthalate) consumables, TPE consumables, TPU consumables, TPC consumables, biodegradable wires, etc. The consumables are selected according to the purpose of the printing object of the 3D printer, the required physical properties, the printing environment and the user's preferences, which is not a limitation of the present application.

[0086] The following will be combined Figures 1 to 18 The principles and implementation methods of a consumable material melting assembly, a nozzle, and a 3D printer for a 3D printer of this embodiment are described in detail so that those skilled in the art can understand the nozzle for a 3D printer of this embodiment without creative work.

[0087] The embodiment of the present application first provides a consumable material melting component for a 3D printer, which can heat the consumable material so that the consumable material melts quickly in the consumable material melting component, effectively improving the melting efficiency of the consumable material.

[0088] Figure 1 The schematic diagram of the structure of the consumable material melting component for a 3D printer provided by the present application in one embodiment is shown. Figure 1 As shown, in this embodiment, the consumable melting component 1 includes: a heating body 11, which is connected to a heat source and can heat the consumable to melt the consumable. The heating body 11 is made of copper, aluminum or other materials with good thermal conductivity.

[0089] Specifically, in this embodiment, the interior of the heating body 11 is provided with a first heating channel 111 and a second heating channel 112 along its axial direction; wherein, the second heating channel 112 is provided in the first heating channel 111, and the consumables are heated in a dual-channel manner through the second heating channel 112 and the first heating channel 111, which can improve the heating efficiency of the consumables and improve the overall melting speed of the consumables. In this embodiment, the second heating channel 112 is in an inverted cone shape along the direction from the consumable inlet to the outlet, and a melting channel 113 is formed between the outer wall of the second heating channel 112 and the inner wall of the first heating channel 111. The second heating channel 112 is provided with a plurality of through holes 1121, and the second heating channel 112 and the melting channel 113 are connected through the through holes 1121.

[0090] In this embodiment, the through holes 1121 are used to peel the outer layer of the consumable material to the melting channel 113 for heating and melting. As the consumable material enters and moves downward along the inverted tapered second heating channel 112, the second heating channel 112 heats the consumable material, softening the outer layer of the consumable material. The through holes 1121 provided on the second heating channel 112 peel the surface layer of the consumable material, sequentially peeling the corresponding softened surface of the consumable material into the melting channel, which heats the peeled consumable material to a molten state.

[0091] When the consumables are melted by the consumable melting component 1 in the embodiment of the present application, the consumables themselves are in a dual heating environment formed by the first heating channel 111 and the second heating channel 112. The consumables are continuously heated and melted, and the outer layer of the consumables is continuously peeled off into the melting channel for heating and melting. While effectively reducing the large resistance generated when the consumables pass through the channel, the closer the consumables are to the nozzle, the smaller the inner diameter of the consumables' inner core, and the closer the consumables' inner core is to the heat source, so that the consumables' inner core can be quickly melted. Therefore, when the consumables pass through the consumable melting component 1 in the embodiment of the present application, the heating efficiency of the consumables can be improved, the overall melting speed of the consumables can be increased, the resistance of the consumables through the channel can be reduced, and the distance between the consumable melting component and the consumables' inner core can be shortened, so that the inner core can be quickly melted, avoiding the problem that part of the inner core of the consumables is not melted when the consumables flow into the nozzle, causing the nozzle to be blocked.

[0092] The first heating channel 111 , the second heating channel 112 , the melting channel 113 and the through hole 1121 in the consumable melting assembly 1 of this embodiment are described in detail below.

[0093] Figure 2 The figure shows a perspective structural diagram of a consumable material melting assembly 1 for a 3D printer provided by the present application in one embodiment. Figure 3The figure shows a schematic diagram of a three-dimensional cross-sectional structure of a consumable material melting assembly 1 for a 3D printer provided by the present application in one embodiment. Figure 2 and Figure 3 As shown, as an embodiment, a first heating channel 111 and a second heating channel 112 are formed inside the heating body 11, wherein the second heating channel 112 is arranged inside the first heating channel 111. Since the second heating channel 112 is in an inverted cone shape, a gap is formed between the outer wall of the second heating channel 112 and the inner wall of the first heating channel 111. In this embodiment, the gap is used as a melting channel 113.

[0094] refer to Figure 2 and Figure 3 As shown, as an embodiment, the first heating channel 111 includes a tubular channel 1111 and a funnel-shaped channel 1112, wherein the second heating channel 112 is arranged in the tubular channel 1111, and the gap formed between the second heating channel 112 and the tubular channel 1111 serves as the melting channel 113. The melted consumables in the second heating channel 112 flow from the bottom of the second heating channel 112 into the funnel-shaped channel 1112, and the melted consumables in the melting channel 113 also flow from the bottom of the melting channel 113 into the funnel-shaped channel 1112, that is, the melted consumables in the second heating channel 112 and the melted consumables in the melting channel 113 are fused in the funnel-shaped channel 1112, and the funnel-shaped channel 1112 is connected to the nozzle to transport the fused consumables to the nozzle for ejection.

[0095] In this embodiment, the second heating channel 112 is in an inverted cone shape from the consumable inlet to the consumable outlet. Because the through holes 1121 provided on the second heating channel 112 continuously peel off the outer layer of the consumable, causing the consumable to become increasingly thinner, the inverted cone shape of the second heating channel 112 in this embodiment allows the outer wall of the consumable to remain in close contact with or in contact with the inner wall of the second heating channel 112 after the outer layer of the consumable is peeled off, allowing the second heating channel 112 to continue to heat and soften the consumable, while the through holes 1121 on the second heating channel 112 continue to peel off the outer layer of the consumable.

[0096] When the consumable material initially enters the second heating channel 112, the outer layer may not be heated and softened to the extent that it can be easily peeled off by the through hole 1121. Therefore, before peeling off the outer layer of the consumable material, the consumable material entering the second heating channel 112 is first preheated to soften the outer layer of the consumable material and make it easier to peel off. Figure 2 and Figure 3As shown, as an embodiment, the second heating channel 112 includes a preheating channel 1122 and a stripping channel 1123; the preheating channel 1122 preheats the consumables that initially enter the second heating channel 112, and after the outer layer of the preheated consumables is softened, the consumables enter the stripping channel 1123 for heating and stripping.

[0097] In one embodiment, the preheating channel 1122 is disposed at the top of the first heating channel 111, and the stripping channel 1123 is disposed within the first heating channel 111. Each through-hole 1121 is disposed along the stripping channel 1123, and the gap between the outer wall of the stripping channel 1123 and the inner wall of the first heating channel 111 constitutes the melting channel 113. After the consumable enters the stripping channel 1123 from the preheating channel 1122, the outer layer of the consumable is stripped from the through-holes 1121 of the stripping channel 1123 to the melting channel 113.

[0098] In other embodiments, the preheating channel 1122 may also be disposed within the first heating channel 111. Dual heating of the first heating channel 111 and the preheating channel 1122 can increase the heating speed of the consumables. When the preheating channel 1122 is disposed within the first heating channel 111, the length of the preheating channel 1122 may be shorter than when the preheating channel is disposed at the top of the first heating channel 111.

[0099] As an implementation method, refer to Figure 2 and Figure 3 As shown, the stripping channel 1123 is disposed within the tubular channel 1111 of the first heating channel 111. The bottom ends of the stripping channel 1123 and the melting channel 113 are respectively connected to the top of the funnel-shaped channel 1112. A through hole is formed at the bottom of the stripping channel 1123, allowing the melted consumables in the stripping channel 1123 to flow from the bottom into the funnel-shaped channel 1112.

[0100] As an embodiment, the top of the stripping channel 1123 is flush with the top of the tubular channel 1111, and the length of the stripping channel 1123 matches the length of the tubular channel 1111. In this way, the length of the stripping channel 1123 and the length of the melting channel 113 are both relative maximum lengths, which can make the heating and melting of the consumables more complete and thorough, and reduce the risk of there being an unmelted inner core after the consumables pass through the stripping channel 1123.

[0101] In other embodiments, the length of the stripping channel 1123 may also be smaller than the length of the tubular channel 1111 , but the length of the stripping channel 1123 should be sufficient to ensure that the inner core of the consumable passing therethrough can be completely melted.

[0102] In one embodiment, the cross-sectional area of ​​the top of the second heating channel 112 matches the cross-sectional area of ​​the consumable. When the consumable enters the second heating channel 112 under pressure, the outer wall of the consumable can fully contact the inner wall of the second heating channel 112, increasing the heating and melting speed and facilitating subsequent peeling of the outer layer of the consumable by the peeling channel.

[0103] In this embodiment, each of the through holes 1121 of the second heating channel 112 passes through the inner wall and the outer wall of the second heating channel 112 , that is, passes through the second heating channel 112 in the transverse direction.

[0104] As an embodiment, the second heating channel 112 is provided with a plurality of through holes 1121 in a randomly distributed manner. The plurality of through holes 1121 may not be arranged in a line or array on the second heating channel 112, but the plurality of through holes 1121 should be distributed along the entire second heating channel 112 and be sufficient in number to ensure a good peeling effect.

[0105] In this embodiment, at least one through hole 1121 is provided along the circumference of the second heating channel 112 at the same height.

[0106] As a preferred embodiment of this embodiment, the through holes 1121 on the circumference of the second heating channel 112 at different heights are staggered along the second heating channel 112. This allows the outer wall of the consumable to be peeled off alternately, ensuring a good peeling effect while further reducing the significant resistance generated when the consumable passes through the second heating channel 112.

[0107] When the through holes 1121 on the circumference of the second heating channel 112 at different heights are staggered along the second heating channel 112, as an embodiment, a through hole 1121 is provided on the circumference of the second heating channel 112 at the same height, and the arc length of the through hole 1121 is less than or equal to the semicircle circumference of the circumference. That is, when a through hole 1121 is provided on the circumference of the second heating channel 112 at the same height, the aperture of the through hole 1121 can be larger, but generally does not exceed the semicircle circumference of the circumference. The through holes 1121 on the circumferences of different heights are staggered to alternately strip the consumables.

[0108] When the through holes 1121 on the circumference of the second heating channel 112 at different heights are staggered along the second heating channel 112, as another embodiment, at least two through holes 1121 are provided on the circumference at the same height of the second heating channel 112. The at least two through holes 1121 provided on the circumference at the same height are evenly arranged along the entire circumference, or evenly arranged along a semicircle.

[0109] In one embodiment, the at least two through holes 1121 provided on the circumference at the same height are evenly arranged along the entire circumference. For example, two through holes 1121 are provided on the circumference at the same height, and the two through holes 1121 are arranged opposite each other along the entire circumference at the same height, with the spacing between the two through holes 1121 being less than or equal to the aperture length of the through holes 1121. In this way, the two through holes 1121 provided on the adjacent circumference below can correspond to the gap between the two through holes 1121 above.

[0110] As an embodiment, at least two of the through holes 1121 arranged on the circumference of the same height are evenly arranged along the semicircle. For example, two through holes 1121 are arranged on the circumference of the same height, and the two through holes 1121 are evenly arranged along the semicircle, and the other semicircle is empty. In this way, the two through holes 1121 arranged on the adjacent circumference below can be arranged correspondingly to the empty semicircle above, forming a staggered distribution of through holes 1121 in sequence.

[0111] In this embodiment, two through holes 1121 are provided on the circumference at the same height, and the two through holes 1121 are arranged opposite to each other along the entire circumference as an example to illustrate how the through holes 1121 in this embodiment peel off the consumables.

[0112] Figure 4 The cross-sectional view of the consumable material melting assembly 1 for a 3D printer provided by the present application in one embodiment is shown. Figure 4 As shown, the consumable side wall 41 in the first direction, the consumable side wall 42 in the second direction, the consumable side wall 43 in the third direction, and the consumable side wall 44 in the fourth direction are different side walls of the consumable 4 along the axial direction. The through holes 1121a1 in the first row and the through holes 1121a2 in the first row are through holes in the same longitudinal linear direction, the through holes 1121b1 in the second row and the through holes 1121b2 in the second row are through holes in the same longitudinal linear direction, and the through holes 1121c1 in the third row and the through holes 1121c2 in the third row are through holes in the same longitudinal linear direction. The through holes 1121 in the first row and the through holes 1121 in the third row on the circumference at the same height are arranged opposite to each other, and the through holes 1121 in the second row and the through holes 1121 in the fourth row on the circumference at the same height are arranged opposite to each other.

[0113] refer to Figure 5 As shown, when the consumable 4 passes through the stripping flow channel 1123, the through holes 1121a1 in the first line and the through holes 1121c1 in the third line at the same height as the through holes 1121a1 in the first line strip the first direction side wall 41 and the third direction side wall 43 of the outer circumference of the consumable 4. The consumable 4 continues to pass through the stripping flow channel 1123, and the consumable 4 is stripped. Figure 6 As shown, through-holes 1121b1 in the second row and through-holes 1121d1 in the fourth row, which is at the same height as through-holes 1121b1 in the second row, peel the outer circumferential sidewalls 42 and 44 of the consumable material in the second direction. The stripping channel 1123 continuously and alternately strips the consumable material in the first direction 41, the consumable material in the third direction 43, the consumable material in the second direction 42, and the consumable material in the fourth direction 44. The stripped outer layer of the consumable material 4 enters the melting channel 113. After repeated stripping by through-holes 1121, the distance between the consumable material melt assembly and the consumable material core is continuously shortened, the cross-sectional area of ​​the consumable material 4 becomes smaller and smaller, and ultimately no solid consumable material is removed.

[0114] As another embodiment, in one embodiment of the present application, the aperture sizes of the through holes 1121 distributed along the second heating channel 112 can be equal, but as a preferred embodiment, the apertures of the through holes 1121 along the second heating channel 112 from the consumable inlet to the outlet decrease successively. As the inner diameter of the consumable becomes smaller and smaller, the through holes 1121 correspondingly become smaller and smaller, which can better achieve the peeling of the outer layer of the consumable.

[0115] As an implementation method, refer to Figure 3 and Figure 4 As shown, the through hole 1121 can be a square hole. Since the square hole has peelable edges on all sides, it can effectively improve the peeling of the outer layer of the consumable material and increase the peeling speed. However, the through hole 1121 of this embodiment is not limited to this, and can also be a polygonal hole or a circular hole. Figure 7 As shown, this is a schematic diagram when the through hole 1121 is a circular hole.

[0116] As an implementation method, refer to Figure 1 、 Figure 3 、 Figure 7 as well as Figure 8As shown, the consumable melting assembly 1 of this embodiment also includes at least one reinforcing rib 114, which is disposed within the melt flow channel 113 and divides the melt flow channel into two or more flow channel spaces. One side of the reinforcing rib 114 is affixed to the inner wall of the first heating flow channel 111, and the other side is affixed to the outer wall of the second heating flow channel 112. The reinforcing rib 114 enhances the thermal conductivity of the consumables peeled into the melt flow channel 113 and provides fixed support for the peeling flow channel 1123.

[0117] Exemplarily, the cross-section of the reinforcing rib 114 is fan-shaped. The top of the reinforcing rib 114 is located at the top of the gap between the outer wall of the second heating channel 112 and the inner wall of the first heating channel 111, and the bottom of the reinforcing rib 114 is flush with the bottom of the second heating channel 112. In other words, the reinforcing rib 114 can support and fix the second heating channel 112 from the top of the stripping channel 1123 and extend all the way to the bottom of the second heating channel 112. The cross-section of the reinforcing rib 114 is fan-shaped. Since the second heating channel 112 is an inverted cone and is fixed to the outer wall of the second heating channel 112, the cross-section of the reinforcing rib 114 is a cone with a smaller top and a larger bottom.

[0118] As an embodiment, the plurality of reinforcing ribs 114 are evenly distributed along the circumference of the second heating channel 112. For example, four reinforcing ribs 114 are evenly distributed along the circumference of the second heating channel 112.

[0119] In addition, in this embodiment, the number and shape of the reinforcing ribs 114 are not limited to the exemplary description of this embodiment.

[0120] As an implementation method, the reinforcing rib 114 is made of copper, aluminum or other metals with good thermal conductivity.

[0121] Exemplarily, the reinforcing rib 114 is made of the same metal as the heating body 11, and at least two of the reinforcing rib 114, the second heating channel 112 and the first heating channel 111 are integrally formed, so that a more stable connection can be achieved between the reinforcing rib 114, the second heating channel 112 and the first heating channel 111.

[0122] The present application also provides a nozzle for a 3D printer. Figure 9 The cross-sectional structure diagram of the nozzle for a 3D printer provided by the present application in one embodiment is shown. Figure 9 As shown, the nozzle in this embodiment includes the above-mentioned consumable melting component 1 for a 3D printer and a throat component 2 and a nozzle component 3 respectively connected to the consumable melting component 1.

[0123] The consumable material melting assembly 1 has been described in detail above and will not be repeated here. The throat assembly 2 and the nozzle assembly 3 in this embodiment are described in detail below.

[0124] In this embodiment, the throat assembly 2 is connected to the inlet of the consumable melting assembly 1, and the nozzle assembly 3 is connected to the outlet of the consumable melting assembly 1. The consumable material enters the consumable melting assembly 1 through the throat assembly 2, and the melted consumable material is ejected from the nozzle assembly 3. The nozzle in this embodiment, through the consumable melting assembly 1, can peel and melt the consumable material at high speed, avoid nozzle outlet blockage, enhance nozzle outlet flow stability, and thus improve printing efficiency.

[0125] As an implementation method, refer to Figures 9 to 14 As shown, the throat assembly 2 includes a heat sink 21, a connecting member 23 and a throat 22 connecting the heat sink 21 and the connecting member 23; an upper groove 115 is formed at the heating body 11 at the inlet end of the consumable melting assembly 1, and the connecting member 23 is fixed in the upper groove 115.

[0126] Among them, the heat sink 21, the throat 22, the connecting piece 23 and the bottom of the upper groove 115 are respectively formed with a through cavity that penetrates the second heating channel 112 along the axial direction of the second heating channel 112, and the throat 22 is respectively connected to the heat sink 21 and the connecting piece 23 by interference fit.

[0127] In this embodiment, the consumable material passes through the throat assembly 2 and then enters the second heating channel 112. The connector 23 is disposed in the upper groove 115 and is threadedly connected or interference-fitted with the groove wall of the upper groove 115 for easy installation. The connector 23 is a metal part, so when the throat assembly 2 transports the consumable material to the second heating channel 112, the connector 23 can transfer heat, preheating the consumable material passing through the connector 23, thereby achieving a preheating effect. This softens the consumable material entering the second heating channel 112, facilitating the 3D printer's extrusion of the consumable material and allowing it to flow in the second heating channel 112, further improving the heating efficiency of the consumable melting assembly 1 for the consumable material.

[0128] In this embodiment, the heat sink 21 reduces the heat transferred upward from the heating body 11 to the consumables by heat dissipation, thereby preventing the consumables from becoming soft and being unable to smoothly enter the heating flow channel, thereby causing blockage.

[0129] As an embodiment, there is a gap between the connecting member 23 and the heat sink 21, that is, one end of the throat 22 is connected to the heat sink 21, and the other end is connected to the connecting member 23, and the middle section is empty, so that a gap is formed between the connecting member 23 and the heat sink 21, thereby further reducing the position of heat transferred to the heat sink 21 through the connecting member 23, and further preventing the consumables from softening and causing the consumables to be unable to smoothly enter the heating flow channel and thus cause blockage.

[0130] refer to Figure 15 and Figure 16 As shown, as an embodiment, the through cavity formed inside the connecting member 23 includes a first through cavity 231 and a second through cavity 232, wherein the first through cavity 231 is connected to the throat 22 by an interference fit, and the cross-sectional area of ​​the second through cavity 232 is less than or equal to the cross-sectional area of ​​the throat 22.

[0131] Since the throat pipe 22 is inserted into the through cavity inside the connecting piece 23 when connected to the connecting piece 23, in order to prevent the throat pipe 22 from being directly inserted into the bottom end of the connecting piece 23 with excessive force and causing an impact on the heating body 11 connected to the bottom end of the connecting piece 23, in this embodiment, the insertion position of the throat pipe 22 in the connecting piece 23 is limited so that the throat pipe 22 will not be fully inserted into the bottom end of the connecting piece 23.

[0132] Specifically, as an embodiment, the inner diameter of the second through cavity 232 is smaller than the inner diameter of the first through cavity 231, so that the through cavity inside the connecting piece 23 forms a boss structure, and the first through cavity 231 is connected to the throat 22 by an interference fit. The cross-sectional area of ​​the second through cavity 232 is smaller than or equal to the cross-sectional area of ​​the throat 22, and the throat 22 is inserted into the bottom end of the first through cavity 231 and is blocked by the second through cavity 232. Due to the obstruction of the second through cavity 232, the throat 22 cannot continue to be inserted downward, thereby avoiding impact on the heating body 11 connected to the bottom end of the connecting piece 23.

[0133] As an embodiment, a limiting portion 233 is provided at one end of the connecting member 23 close to the heat sink 21 . When the connecting member 23 is fixed in the upper groove 115 , the limiting portion 233 clamps the top surface of the heating body 11 .

[0134] Among them, reference Figure 15 As shown, in order to facilitate control of the limiting portion 233 , an assembly surface 2331 is provided on the limiting portion 233 , which facilitates the wrench to rotate and control the limiting portion 233 , thereby facilitating the assembly of the connecting member 23 and the heating body 11 .

[0135] As an embodiment, a lower groove 116 is formed at the heating body 11 at the outlet end of the consumable melting component 1, and the lower groove 116 is connected to the bottom of the second heating channel 112. One end of the nozzle assembly 3 is fixed in the lower groove 116, and the other end of the nozzle assembly 3 sprays out the consumable, wherein the nozzle assembly 3 is threadedly connected or interference-fitted to the groove wall of the lower groove 116 for easy installation.

[0136] refer to Figure 17 and Figure 18 As shown, the nozzle assembly 3 includes a nozzle body 31 and a nozzle 313 arranged at the lower end of the nozzle body 31, and a first ejection channel 311 and a second ejection channel 312 connected to the first heating channel 111 are formed inside the nozzle body 31 along its axial direction, and the second ejection channel 312 is placed in the nozzle 313.

[0137] The first ejection channel 311 is connected to the first heating channel 111 , a funnel-shaped transition channel is formed at the bottom of the first ejection channel 311 , and the funnel-shaped transition channel is connected to the second ejection channel 312 , and the melted consumables are ejected from the second ejection channel 312 .

[0138] As an embodiment, a mounting portion 32 is further provided on the nozzle body 31, and the mounting portion 32 is protruded outward along the radial direction of the nozzle body 31. The shape of the mounting portion 32 is not limited here. The structure of the mounting portion 32 can be a hexagonal prism structure to facilitate the assembly of the nozzle body 31 and the heating body 11.

[0139] As an embodiment, the mounting portion 32 may be a nut, and the mounting portion 32 is fixedly connected to the nozzle body 31 , thereby facilitating the assembly between the nozzle body 31 and the heating body 11 .

[0140] In other embodiments, the mounting portion 32 may also be integrally formed with the nozzle body 31 .

[0141] The present application also provides a 3D printer comprising the aforementioned nozzle for a 3D printer. Because the 3D printer nozzle is equipped with the consumable melting assembly 1 provided in this embodiment, the 3D printer provided in this embodiment can reduce the resistance of the consumable through the flow channel and shorten the distance between the consumable melting assembly and the consumable core, allowing the consumable core to melt quickly, effectively preventing nozzle blockage, and effectively improving the stability of the nozzle outlet flow rate and the printing speed of the 3D printer.

[0142] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this application shall be covered by the claims of this application.

Claims

1. A consumable material melting assembly for a 3D printer, characterized in that: include: The heating body has a first heating channel and a second heating channel respectively provided inside along its axial direction; the second heating channel is arranged in the first heating channel, and the second heating channel is in an inverted cone shape from the inlet to the outlet of the consumables. A gap is formed between the outer wall of the second heating channel and the inner wall of the first heating channel, and the gap constitutes a melting channel. A plurality of through holes are provided on the second heating channel, and the second heating channel is connected to the melting channel through the through holes.

2. The consumable material melting assembly for a 3D printer according to claim 1, characterized in that: The second heating channel includes a preheating channel and a stripping channel; the first heating channel includes a tubular channel and a funnel-shaped channel; The stripping channel is arranged in the first heating channel, each of the through holes is arranged along the stripping channel, and the gap between the outer wall of the stripping channel and the inner wall of the first heating channel constitutes the melting channel.

3. The consumable material melting assembly for a 3D printer according to claim 1 or 2, characterized in that: A plurality of through holes are distributed on the second heating channel.

4. The consumable material melting assembly for a 3D printer according to claim 1 or 2, characterized in that: At least one through hole is provided on the circumference at the same height along the second heating channel, and the through holes are arranged alternately in sequence along the second heating channel, or the through holes are evenly arranged along the circumference at the same height.

5. The consumable material melting assembly for a 3D printer according to claim 1, wherein: The apertures of the through holes distributed along the second heating channel are equal, or the apertures of the through holes along the direction from the inlet to the outlet of the second heating channel consumable decrease in sequence; the through holes are circular holes or polygonal holes.

6. The consumable material melting assembly for a 3D printer according to claim 1, characterized in that: It also includes at least one reinforcing rib, each of which is evenly distributed in the melting flow channel, with one side of the reinforcing rib being fixed to the inner wall of the first heating flow channel and the other side being fixed to the outer wall of the second heating flow channel.

7. The consumable material melting assembly for a 3D printer according to claim 6, characterized in that: At least two of the reinforcing rib, the second heating channel, and the first heating channel are integrally formed.

8. A nozzle for a 3D printer, characterized in that: The invention comprises a consumable material melting assembly for a 3D printer according to any one of claims 1 to 7, a throat assembly and a nozzle assembly; the throat assembly is connected to the inlet of the consumable material melting assembly, and the nozzle assembly is connected to the outlet of the consumable material melting assembly, so that the consumable material enters the consumable material melting assembly from the throat assembly and is melted before being ejected from the nozzle assembly.

9. The nozzle for a 3D printer according to claim 8, characterized in that: A lower groove is formed at the heating body at the outlet end of the consumable melting component, and the lower groove is connected to the bottom of the second heating channel. One end of the nozzle assembly is fixed in the lower groove, and the other end of the nozzle assembly sprays out the consumable. An ejection channel connected to the first heating channel is formed inside the nozzle assembly along its axial direction.

10. A 3D printer, characterized in that: The nozzle for a 3D printer comprises the nozzle according to any one of claim 8 or claim 9.

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