Multi-consumable extrusion printing device and 3D printing apparatus using same

Abstract

Provided in the embodiments of the present application are a multi-consumable extrusion printing device and a 3D printing apparatus using same. The multi-consumable extrusion printing device comprises a driving assembly, a switching assembly, and a plurality of extrusion assemblies. The plurality of extrusion assemblies are arranged side by side, each extrusion assembly comprising an extrusion gear set, and each extrusion gear set being used for extruding a consumable in a first direction. The driving assembly comprises a gear driving portion, the gear driving portion being such configured that the gear driving portion can be engaged with one of the extrusion gear sets. The switching assembly comprises an abutting portion, the abutting portion being arranged on the side of the plurality of extrusion assemblies away from the gear driving portion, and the abutting portion being configured to abut against one of the extrusion assemblies, so that the extrusion gear set corresponding to the extrusion assembly moves in the first direction, so as to engage with the gear driving portion.

Description

Multi-material extrusion printing apparatus and 3D printing equipment using it

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202421244570.0, filed with the Chinese Patent Office on May 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of 3D printing, and more particularly to a multi-material extrusion printing apparatus and a 3D printing device using the same. Background Technology

[0004] 3D printing is a rapid prototyping technology that uses digital model files as a basis and employs bondable materials such as special waxes, powdered metals, or plastics to create three-dimensional objects by printing layers of material. Fused deposition modeling (FDM) is one of the main 3D printing technologies. This technology involves heating and melting a hot-melt filament, extruding it from a nozzle, and depositing it onto a forming platform or a previously cured layer of material. Once the temperature drops below the filament's curing temperature, it begins to solidify, ultimately creating the physical object.

[0005] Traditional two-color printing no longer meets the needs of today's consumers, and multi-color printing technology has begun to emerge. Most existing 3D printing devices can print multiple colors or multiple materials. When it is necessary to change the color or material of the consumables, one way is to change the material manually, and another way is to equip a corresponding number of motors to control the feeding of consumables of the corresponding color or material. This has problems such as complex structure and large space occupation.

[0006] How to solve the above problems is something that skilled technicians need to consider. Summary of the Invention

[0007] To address the problems in the prior art, this application provides a multi-consumable extrusion printing apparatus and a 3D printing device using the same.

[0008] This application provides a multi-consumable extrusion printing apparatus, which includes a drive assembly, a switching assembly, and a plurality of extrusion assemblies. The plurality of extrusion assemblies are arranged side by side, and each extrusion assembly includes an extrusion gear set for extruding consumables in a first direction. The drive assembly includes a gear drive portion configured to mesh with one of the extrusion gear sets. The switching assembly includes a holding portion disposed on the side of the plurality of extrusion assemblies away from the gear drive portion. The holding portion is configured to abut against one of the extrusion assemblies to move the extrusion gear set corresponding to that extrusion assembly in the first direction, thereby meshing with the gear drive portion.

[0009] In one embodiment, a plurality of the extrusion components are arranged side by side along a second direction, the gear drive includes drive teeth that extend along the second direction, and the abutment is configured to be movable along the second direction.

[0010] In one embodiment, the switching assembly further includes a first driving part, a transmission rod, and a guide rod. The transmission rod and the guide rod extend along the second direction and are spaced apart. The abutting part is sleeved on the outside of the transmission rod and the guide rod. The abutting part is connected to the first driving part through the transmission rod and is slidably connected to the guide rod.

[0011] In one embodiment, the transmission rod and the guide rod are arranged in the same layer along a first direction, each of the extrusion gear sets is located between the abutment portion and the gear drive portion along the first direction, and the extrusion assembly is located on the same side of the gear drive portion along the second direction.

[0012] In one embodiment, the abutment has a protruding end on the side near the extrusion assembly, the protruding end being configured to move with the abutment to selectively abut one of the extrusion assemblies.

[0013] In one embodiment, each of the extrusion gear sets includes a first extrusion wheel and a second extrusion wheel, the first extrusion wheel and the second extrusion wheel being arranged side by side along a third direction, the second extrusion wheel being located along the third direction on the side of the first extrusion wheel away from the gear drive unit.

[0014] In one embodiment, each first extrusion wheel includes a first transmission tooth and a first guide tooth arranged side by side along the second direction and capable of rotating synchronously, and each second extrusion wheel includes a second transmission tooth and a second guide tooth arranged side by side along the second direction. The first guide tooth and the second guide tooth are spaced apart, the first transmission tooth meshes with the second transmission tooth, and the first transmission tooth is in separable contact with the gear drive unit.

[0015] In one embodiment, the multi-consumable extrusion printing apparatus further includes a limiting frame, and a plurality of extrusion components are connected to the limiting frame. Each extrusion component includes a reset member connected to the limiting frame, and the reset member is configured to drive the extrusion component to reset along the first direction.

[0016] In one embodiment, the multi-consumable extrusion printing device further includes a limiting frame, the limiting frame having multiple through holes, the multiple hot ends corresponding to the multiple extrusion components being respectively provided with the multiple through holes, and the end of each hot end away from the extrusion component passing through one of the through holes.

[0017] This application also provides a 3D printing device, which includes a support frame, a molding substrate, and a multi-material extrusion printing device as described in any of the foregoing embodiments. The multi-material extrusion printing device is movably connected to the support frame to adjust the position of the multi-material extrusion printing device relative to the molding substrate. Attached Figure Description

[0018] Figure 1 is a perspective view of a multi-consumable extrusion printing apparatus provided in one or more embodiments of this application.

[0019] Figure 2 is a perspective view of the multi-consumable extrusion printing apparatus provided in one or more embodiments of this application from another angle.

[0020] Figure 3 is a perspective view of the multi-consumable extrusion printing apparatus provided in one or more embodiments of this application from another angle.

[0021] Figure 4 is an exploded perspective view of a multi-consumable extrusion printing apparatus provided in one or more embodiments of this application.

[0022] Figure 5 is a partial perspective view of a multi-consumable extrusion printing apparatus provided in one or more embodiments of this application.

[0023] Figure 6 is a schematic diagram of a 3D printing device provided in one or more embodiments of this application.

[0024] Explanation of reference numerals in the attached drawings: 10-Multi-consumable extrusion printing device; 11-Switching assembly; 111-Supporting part; 1110-Through hole; 1111-Protruding end; 112-Transmission rod; 113-Guide rod; 114-First drive unit; 12-Drive assembly; 121-Gear drive unit; 1210-Drive gear; 122-Second drive unit; 123-Gear transmission structure; 13-Extrusion assembly; 130-Transmission channel; 131-Transmission unit; 1311-Housing; 1312-Accommodation cavity; 1313-Opening; 1314-Rotating shaft; 1315-Extrusion gear set; 1316-First extrusion wheel; 13161-First transmission gear; 13162-First guide gear; 1317-Second extrusion wheel; 13171-Second transmission gear; 13172-Second guide gear; 133-Reset part; 18-Hot end; 181-Throat; 182-Nozzle; 183-Thermal coupling functional structure; 14-Bracket; 141-First connecting plate; 142-Second connecting plate; 15-Air-cooled assembly; 151-First air-cooled section; 152-Second air-cooled section; 16-Limiting frame; 160-Through hole; 161-Assembly slot; Z-First direction; X-Second direction; Y-Third direction; 2-3D printing equipment; 21-Support frame; 22-Molding substrate; The following detailed embodiments will further illustrate this application in conjunction with the above drawings. Detailed Implementation

[0025] The following description will be given with reference to the accompanying drawings for a more complete description of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the present application. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but without excluding the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant technology and in the content of this application, and should not be interpreted as having an idealized or overly formal meaning.

[0026] Traditional two-color printing no longer meets the needs of today's consumers, leading to the rise of multi-color printing technology. Most existing 3D printing devices can print multiple colors or materials. When changing filament colors or materials, one method is manual filament changing, and another is using a corresponding number of motors to control the feeding of the corresponding color or material. However, this method suffers from complex structures and large space requirements. Solving these problems is a challenge that technical personnel need to address.

[0027] Correspondingly, the multi-consumable extrusion printing apparatus includes a drive assembly, a switching assembly, and multiple extrusion assemblies; the multiple extrusion assemblies are arranged side by side, each extrusion assembly includes an extrusion gear set for extruding consumables in a first direction; the drive assembly includes a gear drive unit configured to mesh with one of the extrusion gear sets; the switching assembly includes a holding part located on the side of the multiple extrusion assemblies away from the gear drive unit, the holding part being configured to abut against one of the extrusion assemblies to move the extrusion gear set corresponding to that extrusion assembly in the first direction, thereby meshing with the gear drive unit.

[0028] Furthermore, the multi-material extrusion printing device of this application has multiple extrusion components capable of extruding various consumables. The switching component, driving component, and multiple extrusion components cooperate with each other. The supporting part can selectively contact one of the multiple extrusion components, pushing that extrusion component along a first direction until the extrusion gear set contacts and meshes with the gear drive unit. The gear drive unit drives the extrusion gear set to rotate and extrude the consumables. The multi-material extrusion printing device of this application has a compact and reasonable structure and high space utilization. The 3D printing equipment of this application utilizes this multi-material extrusion printing device, which also has the advantages of a compact and reasonable structure and high space utilization.

[0029] As will be understood by those skilled in the art, “3D printing” refers to a technology that constructs objects by printing layer by layer using powdered metal or plastic and other bondable materials based on digital model files.

[0030] As will be understood by those skilled in the art, “consumable” refers to a thermoplastic material constructed in the form of a strip, which is usually solid at room temperature.

[0031] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments. It should be noted that components depicted in the drawings are not necessarily shown to scale; and identical or similar components will be designated with the same or similar reference numerals or similar technical terms.

[0032] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0033] As shown in Figures 1 to 5, this application embodiment provides a multi-consumable extrusion printing apparatus 10, including a switching component 11, a driving component 12, and a plurality of extrusion components 13. Each of the plurality of extrusion components 13 is capable of extruding consumables (not shown). The driving component 12 is configured to be spaced apart from the plurality of extrusion components 13. The switching component 11 is movable relative to the plurality of extrusion components 13, pushing one of the plurality of extrusion components 13 to contact and drive the connection with the driving component 12, thereby realizing the extrusion of consumables by that extrusion component 13.

[0034] In one embodiment, a plurality of extrusion assemblies 13 are arranged side by side. Each extrusion assembly 13 includes an extrusion gear set 1315 for extruding consumables in a first direction Z. A drive assembly 12 includes a gear drive 121 configured to mesh with one of the extrusion gear sets 1315. A switching assembly 11 includes a holding portion 111 located on the side of the plurality of extrusion assemblies 13 away from the gear drive 121. The holding portion 111 is configured to abut against one of the extrusion assemblies 13 to move the corresponding extrusion gear set 1315 in the first direction Z, thereby engaging with the gear drive 121.

[0035] Understandably, the multi-consumable extrusion printing apparatus 10 of this application has multiple extrusion components 13 capable of extruding various consumables. The switching component 11, the drive component 12, and the multiple extrusion components 13 cooperate with each other. The holding part 111 can selectively abut against one of the multiple extrusion components 13, pushing that extrusion component 13 along the first direction Z until the extrusion gear set 1315 contacts and meshes with the gear drive part 121. The gear drive part 121 drives the extrusion gear set 1315 to start rotating to extrude consumables. The multi-consumable extrusion printing apparatus 10 of this application has a compact and reasonable structure and high space utilization.

[0036] For ease of understanding, this application defines an intersecting second direction X, a third direction Y, and a first direction Z. The second direction X, the third direction Y, and the first direction Z can be three non-parallel straight lines in space; further, the second direction X, the third direction Y, and the first direction Z can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the second direction X is described as the X-axis direction of the three-dimensional coordinate system, the third direction Y as the Y-axis direction of the three-dimensional coordinate system, and the first direction Z as the Z-axis direction of the three-dimensional coordinate system.

[0037] In one embodiment, a plurality of extrusion components 13 are arranged side by side along a second direction X, a gear drive unit 121 includes a drive tooth 1210 that extends along the second direction X, and a holding part 111 is configured to be movable along the second direction X.

[0038] Understandably, the holding part 111 is able to move along the second direction X, thereby contacting one of the plurality of extrusion components 13 arranged side by side along the second direction X, and pushing the extrusion component 13 to contact the gear drive part 121, thereby extruding the gear set 1315 and engaging the drive teeth 1210. The drive teeth 1210 extend along the second direction X, so that any one of the plurality of extrusion components 13 can engage with the drive teeth 1210 after being pushed by the holding part 111, realizing the switching of the extrusion component 13.

[0039] In this embodiment, the drive output structure in the switching component 11 and the drive component 12 is located on the side of the gear drive unit 121 away from the multiple extrusion components 13 along the third direction Y. Other components in the multi-consumable extrusion printing device 10 (e.g., air cooling) can also be located on the side of the gear drive unit 121 away from the multiple extrusion components 13 along the third direction Y, so as to avoid interference of other structures with the multiple extrusion components 13 and improve space utilization efficiency.

[0040] In one embodiment, the switching assembly 11 further includes a first driving part 114, a transmission rod 112, and a guide rod 113. The transmission rod 112 is driveably connected to the first driving part 114, and the abutment part 111 is driveably connected to the first driving part 114 via the transmission rod 112. The transmission rod 112 and the guide rod 113 extend along the second direction X and are spaced apart. The abutment part 111 is sleeved on the outside of the transmission rod 112 and the guide rod 113, and the abutment part 111 is slidably connected to the guide rod 113.

[0041] In this embodiment, the supporting portion 111 has two parallel through holes 1110, through which the transmission rod 112 and the guide rod 113 pass. The inner wall of the through hole 1110 through which the transmission rod 112 passes may be provided with internal threads (not shown), and the outer side of the transmission rod 112 may be provided with external threads (not shown). The first driving portion 114 drives the transmission rod 112 to rotate, thereby driving the supporting portion 111 to move along the second direction X. The inner wall of the through hole 1110 through which the guide rod 113 passes may have a smooth inner surface, and the guide rod 113 may also have a smooth outer surface. The guide rod 113 extends along the second direction X to guide the supporting portion 111. The side of the supporting portion 111 without the through holes 1110 is a protruding end 1111 with an arc-shaped surface, which is used to abut the surface of the extrusion assembly 13. In one embodiment, the abutment portion 111 has a protruding end 1111 on the side near the extrusion assembly 13, the protruding end 1111 being configured to move with the abutment portion 111 to selectively abut one of the extrusion assemblies 13.

[0042] In one embodiment, the height of the supporting portion 111 relative to the protruding portion of the guide rod 113 facing the extrusion assembly 13 is greater than the gap between the extrusion assembly 13 and the guide rod 113. It is understood that multiple extrusion assemblies 13 arranged side-by-side are spaced apart from the guide rod 113 when not compressed by the supporting portion 111, but the spacing of this gap is less than the height of the protrusion of the supporting portion 111 (or understood as the protrusion height of the protruding end 1111), such that after the supporting portion 111 abuts against the corresponding extrusion assembly 13, the height difference pushes the extrusion assembly 13 out, causing the extrusion assembly 13 to be pushed into contact with the gear drive portion 121.

[0043] In one embodiment, the multi-consumable extrusion printing apparatus 10 further includes a support 14, which includes a first connecting plate 141 and a second connecting plate 142 spaced apart along a second direction X. The transmission rod 112, the guide rod 113, and the gear drive unit 121 are all disposed between the first connecting plate 141 and the second connecting plate 142, and their ends are all fixed by the first connecting plate 141 and the second connecting plate 142.

[0044] In one embodiment, the drive assembly 12 further includes a second drive unit 122, which is connected to the gear drive unit 121 in a transmission manner. The first drive unit 114 is connected to the first connecting plate 141, and the second drive unit 122 is connected to the second connecting plate 142. It is understood that both the first drive unit 114 and the second drive unit 122 can be motors. The first drive unit 114 can be directly connected to the transmission rod 112, and the second drive unit 122 and the gear drive unit 121 can be connected in a transmission manner through a gear transmission structure 123. The gear transmission structure 123 may, for example, include a pair of helical gears (not shown), one of which is connected to the second drive unit 122, and the other of which is connected to the gear drive unit 121.

[0045] In other embodiments, the gear drive unit 121 can also be driven by other driving methods, such as by impact, pushing or other means to drive the gear drive unit 121 to move.

[0046] In one embodiment, the transmission rod 112 and the guide rod 113 are arranged in the same layer along the first direction Z. Each extrusion gear set 1315 is located between the supporting part 111 and the gear drive part 121 along the first direction Z, and a plurality of extrusion assemblies 13 are arranged on the same side of the gear drive part 121 along the second direction X.

[0047] In this embodiment, multiple extrusion components 13 are arranged side by side along the second direction X, and the multiple extrusion components 13 are at the same or very close distance from the gear drive unit 121 along the third direction Y. The gear drive unit 121 has the same outer diameter, and the multiple extrusion components 13 are at the same or very close distance from the gear drive unit 121 along the first direction Z.

[0048] In this embodiment, the transmission rod 112 and the guide rod 113 being arranged in the same layer along a first direction Z means that the transmission rod 112 and the guide rod 113 are in the same layer in terms of spatial geometry along the first direction Z, that is, the transmission rod 112 and the guide rod 113 have the same spacing relative to the same reference object along the first direction Z.

[0049] Understandably, when a specific consumable needs to be extruded, the control switching component 11 moves the holding part 111 along the second direction X to the corresponding extrusion component 13. The protruding end 1111 of the holding part 111 protrudes towards the extrusion component 13 along the first direction Z, abutting the extrusion component 13. Under the push of the holding part 111, the extrusion component 13 approaches the gear drive part 121 along the first direction Z. One of the extrusion gear sets 1315 contacts and meshes with the gear drive part 121, thus extruding the consumable. Simultaneously, the extrusion components 13 not abutted by the holding part 111 maintain a spaced-apart position from the gear drive part 121. The extrusion gear sets 1315 in these extrusion components 13 do not mesh with the gear drive part 121 and therefore do not rotate, thus preventing the extrusion of consumables.

[0050] In one embodiment, the extrusion assembly 13 includes a transmission section 131, which is connected to and engages with a hot end 18 located on the side of the transmission section 131 away from the drive assembly 12. The extrusion assembly 13 has a transmission channel 130 for transmitting consumables, which passes through the transmission section 131 and the hot end 18 in sequence. The transmission section 131 includes an extrusion gear set 1315, which clamps the transmission channel 130.

[0051] Understandably, the transmission unit 131 is used to mesh with the gear drive unit 121, further driving the extrusion gear set 1315 to rotate and push the consumable to the hot end 18. The hot end 18 includes common functional units such as the throat 181, nozzle 182, and thermal coupling functional structure 183, which are used to further process the consumable and finally extrude the molten consumable.

[0052] In one embodiment, the transmission unit 131 includes a housing 1311, and an extrusion gear set 1315 is housed within the housing 1311 and rotatably connected to the housing 1311. An opening 1313 is provided on the side of the housing 1311, through which one of the extrusion gear sets 1315 is exposed on the side away from the other for separable contact with the gear drive unit 121.

[0053] In this embodiment, the housing 1311 has an internal accommodating cavity 1312, which communicates with the opening 1313. The accommodating cavity 1312 also contains two parallel rotating shafts 1314, which are fixed to the housing 1311. Two of the extrusion gear sets 1315 are respectively fitted onto these two rotating shafts 1314, and the extrusion gear sets 1315 are always in a meshed state. The opening 1313 is located on the side of the housing 1311 facing the gear drive unit 121, and one of the extrusion gear sets 1315 located on this side can contact and mesh with the gear drive unit 121.

[0054] In one embodiment, each extrusion gear set 1315 includes a first extrusion wheel 1316 and a second extrusion wheel 1317. The first extrusion wheel 1316 and the second extrusion wheel 1317 are arranged side by side along a third direction Y, and the second extrusion wheel 1317 is located on the side of the first extrusion wheel 1316 away from the gear drive unit 121 along the third direction Y.

[0055] In one embodiment, each first extrusion wheel 1316 includes a first transmission tooth 13161 and a first guide tooth 13162 arranged side-by-side along the second direction X and capable of rotating synchronously. Each second extrusion wheel 1317 includes a second transmission tooth 13171 and a second guide tooth 13172 arranged side-by-side along the second direction X. The first guide tooth 13162 and the second guide tooth 13172 are spaced apart, and a transmission channel 130 is disposed between the first guide tooth 13162 and the second guide tooth 13172. The first transmission tooth 13161 meshes with the second transmission tooth 13171, and the first transmission tooth 13161 is in separable contact with the gear drive unit 121.

[0056] Understandably, in an extrusion assembly 13, the first drive tooth 13161 and the second drive tooth 13171 are respectively extended outward from the axis of the first extrusion wheel 1316 and the second extrusion wheel 1317, so that the first drive tooth 13161 and the second drive tooth 13171 remain engaged in the assembled state; the first guide tooth 13162 and the second guide tooth 13172 are respectively biased towards one side of the axis of the first extrusion wheel 1316 and the second extrusion wheel 1317, so that there is a gap between the first guide tooth 13162 and the second guide tooth 13172 to accommodate consumables, and the grooves of the first guide tooth 13162 and the second guide tooth 13172 cooperate to guide the consumables. When consumables are provided in the transmission channel 130, the consumables will be clamped by the first guide tooth 13162 and the second guide tooth 13172. When the first extrusion wheel 1316 starts to rotate driven by the gear drive unit 121, the second extrusion wheel 1317 meshes with the first extrusion wheel 1316 and also starts to rotate. The first guide tooth 13162 and the second guide tooth 13172 cooperate to push the consumables.

[0057] In one embodiment, the multi-consumable extrusion printing apparatus 10 further includes a limiting frame 16. The limiting frame 16 has a plurality of through holes 160, and the plurality of hot ends 18 corresponding to the plurality of extrusion components 13 are respectively disposed in the plurality of through holes 160, with the end of each hot end 18 away from the extrusion component 13 passing through a through hole 160.

[0058] In this embodiment, one side of the limiting frame 16 is connected to the bracket 14, and the other side, spaced along the first direction Z, is provided with a plurality of through holes 160. The plurality of through holes 160 are spaced along the second direction X, and each through hole 160 corresponds to an extrusion assembly 13. When the extrusion assembly 13 is held by the holding part 111, the hot end 18 extends along the first direction Z under the guidance of the hole wall of the through hole 160, so as to extrude consumables.

[0059] Understandably, multiple extrusion components 13 are movably connected to the limiting frame 16, and all multiple extrusion components 13 can move relative to the limiting frame 16 along the first direction Z. The connection between the extrusion components 13 and the limiting frame 16 can be varied. For example, the limiting frame 16 may have an assembly groove 161 extending along the first direction Z, and the extrusion component 13 may have a connecting block (not shown) extending along the first direction Z. The connecting block is located in the groove, and a compressed spring (not shown) may be provided at the bottom end of the groove away from the supporting portion 111 along the first direction Z. The spring abuts against the inner wall of the limiting frame 16 and the connecting block for the repositioning of the extrusion component 13. Other connection methods between the extrusion components 13 and the limiting frame 16 can also be used, which will not be elaborated here.

[0060] In one embodiment, the extrusion assembly 13 further includes a reset section 133, which can be a magnetic reset structure. Specifically, the reset section 133 includes two strip-shaped permanent magnets, one of which is connected to the limiting frame 16, and the other is connected to the housing 1311 of the extrusion assembly 13. Both permanent magnets of the reset section 133 extend along the first direction Z, and the two permanent magnets are configured such that opposite magnetic poles are arranged side by side along the first direction Z. When the extrusion assembly 13 is not pushed by the protrusion end 1111 along the first direction Z, the arrangement of the reset section 133 is such that the N pole of one permanent magnet corresponds to the S pole of the other permanent magnet, and the S pole of one permanent magnet corresponds to the N pole of the other permanent magnet; when the extrusion assembly 13 is pushed by the protrusion end 1111 along the first direction Z to engage with the gear drive section 121, the arrangement of the reset section 133 changes to such that the S pole of one permanent magnet corresponds to the S pole of the other permanent magnet, and the N poles of the two permanent magnets are staggered. As will be understood by those skilled in the art, when the protruding end 1111 that is resisting the extrusion assembly 13 is removed, the extrusion assembly 13 will be reset along the first direction Z under the magnetic reset force of the reset part 133.

[0061] In one embodiment, the multi-consumable extrusion printing apparatus 10 further includes an air-cooling assembly 15 connected to the limiting frame 16. The air-cooling assembly 15 may include a first air-cooling section 151 for cooling the nozzle 182, and a second air-cooling section 152 for cooling the thermally coupled functional structure 183. The first air-cooling section 151 is disposed on the side of the limiting frame 16 away from the hot end 18 along the third direction Y, and the second air-cooling section 152 is arranged side by side with the plurality of extrusion assemblies 13 along the second direction X.

[0062] Further referring to Figure 6, this embodiment of the application also provides a 3D printing device 2, including a support frame 21, a molding substrate 22, and the aforementioned multi-material extrusion printing device 10. The molding substrate 22 is located below the multi-material extrusion printing device 10. The multi-material extrusion printing device 10 is movably connected to the support frame 21, and the multi-material extrusion printing device 10 can slide relative to the support frame 21 along a second direction X, a third direction Y, or a first direction Z to adjust the position of the multi-material extrusion printing device 10 relative to the molding substrate 22.

[0063] Furthermore, the 3D printing equipment 2 also includes a feeding assembly (not shown in the figure), which is connected to the feed port (not shown in the figure) of the multi-material extrusion printing device 10 via a pipe. The feeding assembly can be installed at the proximal or distal end of the multi-material extrusion printing device 10 to achieve proximal or distal material feeding of the 3D printing equipment 2. The 3D printing equipment 2 of this application utilizes the multi-material extrusion printing device 10 of the embodiments of this application, which also has the advantages of compact and reasonable structure and high space utilization.

[0064] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A multi- consumable extrusion printing device, characterized by, The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device.

2. The multi consumable extrusion printing device of claim 1, wherein, The application relates to a multi-extrusion printing device.

3. The multi consumable extrusion printing device of claim 2, wherein, The application relates to a multi-extrusion printing device.

4. The multi consumable extrusion printing device of claim 3, wherein, The application relates to a multi-extrusion printing device.

5. The multi consumable extrusion printing device of claim 3, wherein, The application relates to a multi-extrusion printing device.

6. The multi consumable extrusion printing device of claim 2, wherein, The application relates to a multi-extrusion printing device.

7. The multi consumable extrusion printing device of claim 6, wherein, The application relates to a multi-extrusion printing device.

8. The multi consumable extrusion printing device of claim 1, wherein, The application relates to a multi-extrusion printing device.

9. The multi consumable extrusion printing device of claim 1, wherein, The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. 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The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extrusion printing device. The application relates to a multi-extr 10. The multi consumable extrusion printing device of claim 1, wherein, The extrusion assembly comprises a transmission part, the extrusion assembly is connected with a hot end, the hot end is located on the side of the transmission part away from the driving assembly; the extrusion assembly is provided with a transmission channel for transmitting consumables, the transmission channel penetrates the transmission part and the hot end in sequence; the extrusion gear set clamps the transmission channel.

11. A 3D printing device, characterized by The multi-consumable extrusion printing device comprises a support frame, a forming substrate and a multi-consumable extrusion printing device, the multi-consumable extrusion printing device is movably connected to the support frame to adjust the position of the multi-consumable extrusion printing device relative to the forming substrate, wherein the multi-consumable extrusion printing device comprises: A plurality of extrusion assemblies are arranged side by side, each extrusion assembly comprises an extrusion gear set for extruding consumables in a first direction; A driving assembly comprises a gear driving part configured to engage with one of the extrusion gear sets; A switching assembly comprises an abutting part provided on the side of the plurality of extrusion assemblies away from the gear driving part, the abutting part is configured to abut one of the extrusion assemblies to make the corresponding extrusion gear set of the extrusion assembly move in the first direction to engage with the gear driving part.

12. The 3D printing device of claim 11, wherein, The plurality of extrusion assemblies are arranged side by side in a second direction, the gear driving part comprises a driving tooth extending in the second direction, and the abutting part is configured to move in the second direction.

13. The 3D printing device of claim 12, wherein, The switching assembly further comprises a first driving part, a transmission rod and a guide rod, the transmission rod and the guide rod extend in the second direction and are arranged at intervals, the abutting part is arranged outside the transmission rod and the guide rod, the abutting part is in transmission connection with the first driving part through the transmission rod, and the abutting part is in sliding connection with the guide rod.

14. The 3D printing device of claim 13, wherein, The transmission rod and the guide rod are arranged in the same layer in a first direction, each extrusion gear set is located between the abutting part and the gear driving part in the first direction, and the extrusion assembly is arranged on the same side of the gear driving part in the second direction.

15. The 3D printing device of claim 13, wherein, The abutting part is provided with a protruding end on the side close to the extrusion assembly, and the protruding end is configured to move with the abutting part to selectively abut one of the extrusion assemblies.

16. The 3D printing device of claim 12, wherein, Each extrusion gear set comprises a first extrusion wheel and a second extrusion wheel, one first extrusion wheel and one second extrusion wheel are arranged side by side in a third direction, and the second extrusion wheel is located on the side away from the gear driving part of the first extrusion wheel in the third direction.

17. The 3D printing device of claim 16, wherein, Each first extrusion wheel comprises a first transmission tooth and a first guide tooth arranged side by side in the second direction and capable of synchronous rotation, each second extrusion wheel comprises a second transmission tooth and a second guide tooth arranged side by side in the second direction, the first guide tooth and the second guide tooth are arranged at intervals, the first transmission tooth and the second transmission tooth are engaged, and the first transmission tooth is in separable contact with the gear driving part.

18. The 3D printing device of claim 11, wherein, The multi-consumable extrusion printing device further comprises a limiting frame, and each of the plurality of extrusion assemblies is connected with the limiting frame.

19. The 3D printing device of claim 11, wherein, The multi-consumable extrusion printing device further comprises a limiting frame, and the limiting frame is provided with a plurality of through holes, and the plurality of hot ends corresponding to the plurality of extrusion assemblies are respectively arranged corresponding to the plurality of through holes, and each of the hot ends is arranged penetrating through one of the through holes away from the end of the extrusion assembly.

20. The 3D printing device of claim 11, wherein, The extrusion assembly comprises a transmission part, the extrusion assembly is connected with a hot end, and the hot end is located on the side of the transmission part away from the driving assembly; the extrusion assembly is provided with a transmission channel for transmitting consumables, and the transmission channel penetrates through the transmission part and the hot end in sequence; and the extrusion gear set clamps the transmission channel.

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