Hot end device, printhead, and 3D printer

Abstract

The application provides a hot end device, a printing head and a 3D printer. The hot end device comprises a heat sink, a throat pipe, a first heat conduction member, a second heat conduction member, a nozzle and a mounting seat. A part of the throat pipe is connected with the heat sink. The first heat conduction member is arranged in a spaced manner with the heat sink. The first heat conduction member is provided with a heating hole. Another part of the throat pipe is connected with the first heat conduction member. The second heat conduction member is connected with the first heat conduction member, and the second heat conduction member is at least partially located in the heating hole. The nozzle is connected with an end of the first heat conduction member which is away from the heat sink. The mounting seat is provided with a first open slot. At least part of the first heat conduction member and / or the second heat conduction member is arranged in the first open slot. The application is beneficial to improving the heat uniformity of different areas of the heating hole and improving the overall melting speed of the wire material.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to a hot-end device, a print head, and a 3D printer. Background Technology

[0002] Fused deposition modeling (FDM) 3D printing technology is a method of constructing three-dimensional objects by printing layer by layer using materials such as plastics based on digital models. In an FDM 3D printer, a feeding mechanism delivers thermoplastic filaments to the hot-end unit. The hot-end unit heats the filaments to a molten state and extrudes them onto a printing plate, depositing them layer by layer to form the three-dimensional object. The hot-end unit heats the filaments through heat-conducting components with perforated structures for the filaments to pass through.

[0003] In the process of developing this application, the inventors discovered at least the following problem in the related technology: the melting speed of the wire material in the hot end device is slow. Utility Model Content

[0004] The purpose of this application is to solve the above-mentioned problems and provide a hot-end device, a print head, and a 3D printer, which enables the filament in the hot-end device to melt quickly.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a hot-end device, comprising:

[0007] heat sink;

[0008] A throat, a portion of which is connected to the radiator;

[0009] A first heat-conducting element is provided, which is spaced apart from the radiator. The first heat-conducting element has a heating hole, and another part of the throat tube is connected to the first heat-conducting element.

[0010] A second heat-conducting element is connected to the first heat-conducting element, and the second heat-conducting element is at least partially located in the heating hole;

[0011] A nozzle is connected to the end of the first heat-conducting element away from the radiator;

[0012] The mounting base has a first opening groove, and at least a portion of the first heat-conducting element and / or the second heat-conducting element is disposed in the first opening groove.

[0013] Optionally, the hot end device further includes:

[0014] The mounting plate body is fixedly connected to the mounting base;

[0015] A first connecting component is used to enable a detachable connection between the mounting plate body and the heat sink.

[0016] Optionally, the first heat-conducting element includes a first section and a second section arranged circumferentially. The outer wall of the first section contacts the groove wall of the first opening groove, and the outer wall of the second section does not contact the groove wall of the first opening groove. The first section and the second section together define the heating hole.

[0017] Optionally, the second heat-conducting element is disposed at the heating hole; and

[0018] One end of the second heat-conducting element is connected to the second section, and / or the second heat-conducting element extends toward the center of the heating hole.

[0019] Optionally, the other end of the second heat-conducting element is connected to the first section, and / or the extending direction of the second heat-conducting element is not parallel to the extending direction of the heating hole.

[0020] Optionally, the second heat-conducting element includes a third section located inside the heating hole and a fourth section located outside the heating hole, the fourth section being used to connect a heating element or a heating cable.

[0021] Optionally, the third section is coaxially arranged with the first heat-conducting element, and / or the fourth section is located at the end of the first heat-conducting element near the heat sink.

[0022] Optionally, a first through hole and a second through hole are respectively provided on the third section and the fourth section. The first through hole and the second through hole have the same extending direction as the heating hole, and the axes of the first through hole and the second through hole do not coincide.

[0023] Secondly, this application provides a printhead comprising:

[0024] Printhead body;

[0025] The hot-end device as described in any of the preceding claims, wherein the mounting base of the hot-end device is mounted on the printhead body.

[0026] Thirdly, this application provides a 3D printer comprising:

[0027] Molding platform;

[0028] The print head described above is movable relative to the forming platform.

[0029] In related technologies, the hot-end device only has a first heat-conducting element with heating holes. The wire is heated within these holes, but the wire in different areas of the heating hole is heated differently (for example, the outer sheath of the wire is heated more and melts earlier, while the inner core is heated less and melts later). This difference in heating results in a slower overall melting rate of the wire. However, one of the above-mentioned technical solutions has the following advantages or beneficial effects: the above-mentioned technical solution also includes a second heat-conducting element connected to the first heat-conducting element, and the second heat-conducting element is at least partially located within the heating hole. The second heat-conducting element can facilitate heat transfer between different areas of the heating hole, which helps improve the heat uniformity in different areas of the heating hole and increases the overall melting rate of the wire. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of the hot end device of some embodiments of this application from a first angle.

[0031] Figure 2 This is a structural schematic diagram of the hot end device of some embodiments of this application from a second angle.

[0032] Figure 3 for Figure 1 The diagram shown is a schematic of the structure with the heat sink, mounting base, and elastic clamps hidden.

[0033] Figure 4 for Figure 2 A schematic diagram of the cross-section along AA.

[0034] Figure 5 This is a schematic diagram of a second type of installation of the second heat-conducting element in a heating hole according to some embodiments of this application.

[0035] Figure 6 This is a schematic diagram of a third installation of the second heat-conducting element in a heating hole according to some embodiments of this application.

[0036] Figure 7 This is a fourth installation diagram of the second heat-conducting element in the heating hole according to some embodiments of this application.

[0037] Figure 8 This is a schematic diagram of the structure of the elastic clamp according to some embodiments of this application.

[0038] Figure 9 This is a schematic diagram of the throat, the first heat-conducting element, the second heat-conducting element, and the first angle of the nozzle in some other embodiments of this application.

[0039] Figure 10 This is a schematic diagram of the second angle of the throat, the first heat-conducting element, the second heat-conducting element, and the nozzle in some other embodiments of this application.

[0040] Figure 11 for Figure 10 A schematic diagram of the cross-section along BB.

[0041] Figure 12 This is a schematic diagram of the structure of the second heat-conducting element in some other embodiments of this application.

[0042] Among them, 1-radiator, 11-socket, 2-throat, 3-first heat conductor, 31-heating hole, 32-first section, 33-second section, 4-second heat conductor, 41-third section, 42-fourth section, 43-first through hole, 44-second through hole, 5-nozzle, 6-mounting base, 61-first opening slot, 71-mounting plate body, 72-first mounting plate, 73-second mounting plate, 731-second opening slot, 8-first connecting assembly, 81-insertion plate, 811-first rotating arm, 812-second rotating arm, 82-rotating shaft, 9-elastic clamp, 91-C-shaped clamp body, 92-clamping part, 93-contact part, 10-ceramic heating element. Detailed Implementation

[0043] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0044] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0045] In this application, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0046] In a first aspect, embodiments of this application provide a hot-end device, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, it includes a radiator 1, a throat 2, a first heat-conducting element 3, a second heat-conducting element 4, a nozzle 5, and a mounting base 6.

[0047] A portion of the throat tube 2 is connected to the radiator 1. A first heat-conducting element 3 is spaced apart from the radiator 1 and has a heating hole 31. Another portion of the throat tube 2 is connected to the first heat-conducting element 3. A second heat-conducting element 4 is connected to the first heat-conducting element 3, and at least a portion of the second heat-conducting element 4 is located within the heating hole 31. A nozzle 5 is connected to the end of the first heat-conducting element 3 furthest from the radiator 1. A mounting base 6 has a first opening groove 61, and at least a portion of the first heat-conducting element 3 and / or the second heat-conducting element 4 is disposed within the first opening groove 61.

[0048] Understandably, another part of the throat 2 is connected to the first heat-conducting element 3, which can both deliver consumables to the first heat-conducting element 3 and position the first heat-conducting element 3. In some embodiments, the first opening groove 61 extends axially along the mounting base 6. The first heat-conducting element 3 and / or the second heat-conducting element 4 are interlocked within the first opening groove 61 by an interference fit.

[0049] The mounting base 6 can be a heating base, which can heat the first heat-conducting element 3 and / or the second heat-conducting element 4 located in the first opening groove 61.

[0050] Optional, see Figures 1 to 3 The hot end device also includes a mounting plate body 71 and a first connecting component 8.

[0051] The mounting plate body 71 is fixedly connected to the mounting base 6, and the first connecting component 8 is used to realize the detachable connection between the mounting plate body 71 and the heat sink 1.

[0052] Optionally, the first connecting component 8 includes a first mounting plate 72 vertically disposed on the mounting plate body 71 and an insert plate 81 rotatably connected to the first mounting plate 72. The heat sink 1 is provided with an insertion hole 11 for inserting the insert plate 81. The insert plate 81 is configured to be disposed in the insertion hole 11 to limit the heat sink 1. When the insert plate 81 is inserted into the insertion hole 11, the insert plate 81 is disposed to avoid the throat tube 2.

[0053] Specifically, in some embodiments, the first connecting component 8 includes two first mounting plates 72, which are arranged parallel to each other on the mounting plate body 71. An insert plate 81 is positioned between the two first mounting plates 72 via a pivot 82. The pivot 82 passes through both the first mounting plates 72 and the insert plate 81. In use, the insert plate 81 rotates around the pivot 82. The first mounting plates 72 provide support and limit the end of the insert plate 81, improving the stability of the connection between the end of the insert plate 81 and the mounting plate body 71. Simultaneously, they enhance the support strength of the insert plate 81 for the heat sink 1 and improve the stability of the insertion plate 81's limiting effect on the heat sink 1.

[0054] Furthermore, the first connecting assembly 8 also includes a resilient reset member, which is sleeved outside the rotating shaft 82. The resilient reset member is configured to provide a restoring force to the insert plate 81 when it disengages from the heat sink 1. The resilient reset member may be a torsion spring. When the resilient reset member is in a naturally relaxed state, the insert plate 81 is inserted into the heat sink 1; when a force is applied to the insert plate 81 to rotate the rotating shaft 82 and unload the heat sink 1, the resilient reset member is subjected to a force; when the insert plate 81 rotates in the opposite direction around the rotating shaft 82, the resilient reset member applies a reverse force to the insert plate 81, so that the insert plate 81 can automatically reset.

[0055] Specifically, the insert plate 81 includes a first rotating arm 811 connected to the first mounting plate 72 and a second rotating arm 812 perpendicularly disposed at the end of the first rotating arm 811 away from the first mounting plate 72. The first rotating arm 811 is disposed on the side of the second rotating arm 812 so that the insert plate 81 can avoid the throat 2 after it is inserted into the radiator 1.

[0056] When the insert plate 81 is installed inside the radiator 1, the second rotating arm 812 is located on the side of the radiator 1 away from the mounting plate body 71, in order to increase the contact area between the insert plate 81 and the radiator 1 and ensure the stability of the connection between the insert plate 81 and the radiator 1.

[0057] Optionally, the mounting base 6 can be fixedly mounted to the mounting plate body 71 via a threaded assembly. This ensures the stability of the connection between the mounting base 6 and the mounting plate body 71 while achieving a detachable connection between the mounting plate 6 and the mounting plate body 71.

[0058] The hot-end device also includes a second mounting plate 73 vertically disposed on the top of the mounting plate body 71. The second mounting plate 73 has a second opening groove 731 for the throat tube 2 to pass through, and the opening of the second opening groove 731 is disposed away from the mounting plate body 71. The second mounting plate 73 serves to position the throat tube 2 and provides a structural basis for the connection between the hot-end device 101 and other devices; the second opening groove 731 facilitates the placement and removal of the throat tube 2. Optionally, the openings of the second opening groove 731 and the first opening groove 61 are arranged in the same direction, which facilitates the disassembly of the heat-conducting component and the throat tube 2.

[0059] Optional, see Figures 4 to 7 and Figure 9 The first heat-conducting element 3 includes a first section 32 and a second section 33 arranged circumferentially. The outer wall of the first section 32 contacts the groove wall of the first opening groove 61, while the outer wall of the second section 33 does not contact the groove wall of the first opening groove 61. The first section 32 and the second section 33 together define the heating hole 31. That is, the first section 32 and the second section 33 are connected and enclosed to form the heating hole 31. The first section 32 and the second section 33 are arranged opposite to each other, and the second section 33 is arranged corresponding to the opening area of ​​the first opening groove 61.

[0060] Understandably, the first section 32 and the second section 33 can be integrally formed, and an opening area can be provided on one side of the first opening groove 61. For example, an opening area is provided on the front side of the first opening groove 61, and groove walls are provided at other positions of the first opening groove 61 (e.g., the rear side, the lateral sides).

[0061] In some embodiments, the outer wall of the first segment 32 corresponds to the groove wall of the first opening groove 61, and the outer wall of the second segment 33 corresponds to the opening area of ​​the first opening groove 61. For example, if the front side of the first opening groove 61 has an opening area and other positions of the first opening groove 61 (e.g., the rear side, the lateral sides) have groove walls, then the first segment 32 defines the rear side and the lateral sides of the heating hole 31, and the second segment 33 defines the front side of the heating hole 31.

[0062] The assembly configuration between the first heat-conducting component 3 and the second heat-conducting component 4 is optional. For example, see... Figures 4 to 7 As shown, in the first embodiment:

[0063] Optionally, the second heat-conducting element 4 is disposed in the heating hole 31, and one end of the second heat-conducting element 4 is connected to the second section 33, and / or the second heat-conducting element 4 extends toward the center of the heating hole 31.

[0064] The second heat-conducting element 4 is connected to the second section 33 of the opening area of ​​the first opening groove 61. In use, the second heat-conducting element 4 improves the heat conduction efficiency of the opening area of ​​the first opening groove 61, compensating for heat loss in the opening area and preventing uneven heating of the filament due to uneven heating of the first heat-conducting element 3. When the second heat-conducting element 4 extends from the second section 33 to the center area of ​​the heating hole 31, it can transfer heat to the center area of ​​the heating hole 31. When the filament enters the heating hole 31, the core of the filament contacts the second heat-conducting element 4, which can directly heat the core of the filament, improving the heating efficiency of the filament core, shortening the melting time difference between the core and the outer peripheral area of ​​the filament, and improving the overall heating efficiency of the filament and printing efficiency. On the other hand, the other end of the second heat-conducting element 4 is spaced apart from the hole wall of the heating hole 31, thereby ensuring the flow rate of the filament.

[0065] Understandably, the second heat-conducting element 4 can be entirely disposed within the heating hole 31. The second heat-conducting element 4 and the first heat-conducting element 3 can be integrally formed or separately disposed and connected by means of pasting, plugging, etc. For example, the side wall of the first heat-conducting element 3 has a side hole that communicates with the heating hole 31. The second heat-conducting element 4 passes through the side hole, and one end of the second heat-conducting element 4 is located inside the heating hole 31, while the other end of the second heat-conducting element 4 is located at the side hole or in an external area of ​​the side hole away from the heating hole 31. The connection between the second heat-conducting element 4 and the side hole can be interference fit, pasting fit, etc.

[0066] The second heat-conducting element 4 and the first heat-conducting element 3 may be made of the same or different materials. In some embodiments, the second heat-conducting element 4 has a higher heat conduction efficiency than the first heat-conducting element 3, thereby ensuring the heat transfer effect. In other embodiments, the second heat-conducting element 4 has a higher hardness than the first heat-conducting element 3, thereby preventing the second heat-conducting element 4 from being damaged or deformed when subjected to the pressure of the wire.

[0067] Optionally, the other end of the second heat-conducting element 4 is connected to the first section 32, and / or the extending direction of the second heat-conducting element 4 is not parallel to the extending direction of the heating hole 31.

[0068] The other end of the second heat-conducting element 4 is connected to the first section 32, so that both sides of the second heat-conducting element 4 are in contact with the inner wall of the heating hole 31, ensuring the structural strength of the second heat-conducting element 4. In some embodiments, one end of the second heat-conducting element 4 is spaced apart from the second section 33, and the other end of the second heat-conducting element 4 is connected to the first section 32. That is, the second heat-conducting element 4 extends from the first section 32 to the second section 33, but is not connected to the second section 33. This also ensures the melting speed of the wire area corresponding to the second section 33, thereby ensuring the overall melting speed of the wire.

[0069] Optionally, from an overall perspective, the second heat-conducting element 4 can be arranged in a strip, spiral, or radial shape within the heating hole 31. When the second heat-conducting element 4 is arranged in a strip shape, from a cross-sectional perspective, the second heat-conducting element 4 can be arranged radially along the heating hole 31, or the extension direction of the heating hole 31 can have a radial component.

[0070] Understandably, the extension direction of the second heat-conducting element 4 forms a certain angle with the axial direction of the heating hole 31. For example, this angle can be less than or equal to 10°, less than or equal to 20°, less than or equal to 30°, less than or equal to 40°, less than or equal to 45°, less than or equal to 50°, less than or equal to 60°, less than or equal to 70°, less than or equal to 80°, less than or equal to 90°, etc. The fact that the extension direction of the second heat-conducting element 4 is not parallel to the extension direction of the heating hole 31 indicates that the aforementioned angle is not 0°. In some embodiments, this angle can be greater than or equal to 80° and less than or equal to 90°, thus allowing a smaller extension dimension of the second heat-conducting element 4 to have a larger radial dimension in the heating hole 31, facilitating uniform heating of the wire in different radial regions. In some embodiments, this angle can be greater than or equal to 40° and less than or equal to 50°; for example, this angle can be 45°, thus giving the second heat-conducting element 4 higher structural strength.

[0071] See Figure 8 As shown, in the first embodiment, the hot end device further includes an elastic clamp 9 and a ceramic heating element 10 constrained by the elastic clamp 9 on the mounting base 6. The ceramic heating element 10 is disposed on the outer wall opposite to the opening area of ​​the first opening groove 61. Specifically, in some embodiments, the elastic clamp 9 includes an inverted clamp body 91 and a clamping portion 92 bent inward from the opening end of the inverted clamp body 91; the inverted clamp body 91 is attached to the outside of the mounting base 6, and the clamping portion 92 extends through the mounting base 6 to the outer wall it abuts against. The inverted clamp body 91 is provided with a contact portion 93 that can abut against the ceramic heating element 10. The ceramic heating element 10 is mounted on the mounting base 6 by the elastic clamp 9, which on the one hand makes the ceramic heating element 10 in close contact with the side wall of the mounting base 6, and on the other hand makes the ceramic heating element 10 detachably connected to the mounting base 6.

[0072] In another embodiment, see Figures 9 to 12 As shown, the second heat-conducting component 4 is disposed inside the heating hole 31.

[0073] Optionally, the second heat-conducting element 4 includes a third section 41 located within the heating hole 31 and a fourth section 42 located outside the heating hole 31, the fourth section 42 being used to connect a heating element or a heating cable. In use, the throat 2 extends into the fourth section 42.

[0074] In some embodiments, the mounting base 6 can be a heating base connected to a heating element, so that the heating base can heat the second heat-conducting element 4 disposed in the first opening groove 61. That is, the heat of the heating element is transferred to the heating base, the heating base then transfers the heat to the second heat-conducting element 4, and the heat is then transferred from the second heat-conducting element 4 to the first heat-conducting element 3.

[0075] In other embodiments, the fourth section 42 can be directly connected to the heating element, so that the heat from the heating element is transferred to the fourth section 42, the heat is transferred from the fourth section 42 to the third section 41, and the heat is then transferred from the second heat-conducting element 4 to the first heat-conducting element 3.

[0076] The heating element can be of various types, such as resistance wire, heating tube, PTC heater, heating film, and semiconductor heating element. The principle of a resistance wire is that current passes through a high-resistivity metal alloy (such as nickel-chromium alloy or iron-chromium-aluminum alloy) to generate high temperature. A heating tube seals the resistance wire in the center of a metal tube (stainless steel, copper, etc.), surrounded by metal powder with good insulation and thermal conductivity. A PTC heater can use positive temperature coefficient thermistor ceramic material. A heating film is a component formed by attaching resistive materials (such as carbon paste or metal paste) in a film form to an insulating substrate (such as mica, ceramic, or glass). A semiconductor heating element is a component formed using the Peltier effect of semiconductors.

[0077] The fourth section 42 can be directly connected to the heating cable, that is, the fourth section 42 itself is a heating element. The fourth section 42 can be a heating block. Understandably, the fourth section 42 can be made of metal material. Heat is transferred from the fourth section 42 to the third section 41, and then the heat is transferred from the second heat-conducting element 4 to the first heat-conducting element 3.

[0078] The third section 41 is located inside the heating hole 31, so that the third section 41 and the first heat-conducting element 3 can heat different areas of the wire, thereby increasing the overall melting speed of the wire.

[0079] Optionally, the third section 41 is coaxially arranged with the first heat-conducting element 3, and / or the fourth section 42 is located at the end of the first heat-conducting element 3 near the heat sink 1. The coaxial arrangement of the third section 41 with the first heat-conducting element 3 can ensure more uniform heat transfer, and the location of the fourth section 42 at the end of the first heat-conducting element 3 near the heat sink 1 facilitates the installation of the second heat-conducting element 4.

[0080] Understandably, the outer diameter of the third section 41 can be less than or equal to the diameter of the heating hole 31, and the outer diameter of the fourth section 42 can be greater than the outer diameter of the third section 41.

[0081] Optionally, the second heat-conducting element 4 defines a connected first through hole 43 and a second through hole 44. The first through hole 43 and the second through hole 44 extend in the same direction as the heating hole 31. The first through hole 43 is closer to the heat sink 1 than the second through hole 44. The axes of the first through hole 43 and the second through hole 44 do not coincide.

[0082] That is, the second heat-conducting element 4 has a first through hole 43 and a second through hole 44 communicating with the heating hole 31, and the second through hole 44 is located close to the heat sink 1. The third section 41 includes a first part close to the fourth section 42 and a second part away from the fourth section 42. The fourth section 42 is connected to the first part, specifically, it can be a plug-in connection, with the first part and the second part connected, and the first part and the second part can be integrally formed. The fourth section 42 and the first part together define the second through hole 44, and the second part defines the first through hole 43. Specifically, the second part defines a plurality of first through holes 43, which are arranged along the circumference of the heating hole 31, and the upper end of each first through hole 43 communicates with the second through hole 44.

[0083] Understandably, the second part includes a plurality of connecting posts and connectors. The upper end of each connecting post is connected to the end face of the first part away from the fourth section 42. The plurality of connecting posts are arranged circumferentially along the heating hole 31. The central part of the first part defines a second through hole 44. The connectors are connected to the inner surface of the lower end of each connecting post. Two adjacent connecting posts and connectors define a first through hole 43. The inner surface of the upper end of each first through hole 43 communicates with the second through hole 44.

[0084] Secondly, embodiments of this application provide a printhead, which includes a printhead body and any of the above-mentioned hot-end devices, with the hot-end device mounted on the printhead body.

[0085] Optionally, the printhead body may include a substrate and a front shell. The substrate is slidably connected to the optical axis of the 3D printer, the front shell is connected to the substrate, and a hot-end device is installed between the front shell and the substrate. The hot-end device can move synchronously with the printhead body.

[0086] The printhead may also include an extrusion assembly. The extrusion assembly is fixed relative to the hot end device, for example, the extrusion assembly and the hot end device are respectively fixedly mounted on the printhead body so that the two can move synchronously. The extrusion assembly is used to feed consumables to the hot end device, which is located below the extrusion assembly in the Z direction. The hot end device is used to receive the consumables fed by the extrusion assembly, heat and melt the consumables and print them onto the forming platform to form a printed part.

[0087] The consumables can be linear polymer materials, also known as filaments. Examples of consumables include PLA (Polylactic Acid), PETG (Polyethylene Terephthalate Glycol), TPU (Thermoplastic Polyurethane), PVA (Polyvinyl Alcohol), BVOH (Butylene Vinyl Alcohol Copolymer), ABS (Acrylonitrile Butadiene Styrene Copolymer), ASA (Acrylonitrile Styrene Acrylate Copolymer), PC (Polycarbonate), PA (Polyamide), PET (Polyethylene Terephthalate), and PPS (Polyphenylene Powder). Sulfide (polyphenylene sulfide), carbon fiber reinforced materials (referring to a mixture of PLA and other base materials with carbon fiber), or glass fiber reinforced materials (referring to a mixture of PLA and other base materials with glass fiber), etc.

[0088] The extrusion assembly may include a driving extrusion wheel and a driven extrusion wheel, defining a consumable channel between them. In use, consumables (such as linear consumables) are placed into the consumable channel and clamped by the driving and driven extrusion wheels. The driving extrusion wheel is then driven (e.g., by a motor) to rotate, thereby conveying the consumables to the heating seat assembly.

[0089] The consumables can be wound on a tray, which is then conveyed to the consumable channel by rolling. The tray can be placed inside a cassette. Understandably, multiple trays can be placed inside the cassette, and the material and / or color of the consumables wound on different trays can be the same or different.

[0090] In other embodiments, the printhead may not include an extrusion assembly. In this case, the extrusion assembly may be arranged distally, for example, fixedly mounted to the frame, fixed to the end of the optical axis, or fixed to the cartridge.

[0091] Thirdly, embodiments of this application provide a 3D printer, which includes a forming platform and a print head as described above, wherein the print head and the forming platform are movable relative to each other.

[0092] 3D printers can also include displacement components in the X, Y, and Z directions. The X direction can be a horizontal direction, the Y direction can be a horizontal forward or backward direction, and the Z direction can be a vertical or up-down direction.

[0093] The print head and forming platform move relative to each other in a controlled manner, driven by displacement components. For example, the forming platform can be displaced relative to the 3D printer frame along the Y direction by a displacement component along the Y direction, while the print head can be displaced along the X and / or Z directions by displacement components along the X and Z directions, heating and melting the filament along a set path, and printing it onto the forming platform to form a printed part. The X, Y, and Z displacement components can be driven by lead screws and nuts, belts, or other mechanisms, and are not limited here.

[0094] In this embodiment, optionally, the frame includes a base and a gantry, with the gantry connected to the base. The forming platform is movably disposed on the base along the Y-axis. The gantry includes two columns spaced apart along the X-axis and a crossbeam connecting the ends of the two columns away from the base, wherein the columns extend along the Z-axis. The crossbeam and columns can be integrally formed or a separate structure connected by bolts or other connecting components. An optical axis movable along the Z-axis is connected between the two columns, and the print head is movably disposed on the optical axis along the X-axis. Thus, the print head can be displaced along the X-axis on the optical axis, and / or displaced along the Z-axis together with the optical axis.

[0095] In other embodiments, the rack may also take other forms of structure, which are not limited here.

[0096] In other embodiments, the movement of the printhead and the forming platform can also take other forms. For example, the forming platform may remain stationary, while the printhead may be displaced relative to the forming platform along the X, Y, and Z directions, respectively. Alternatively, the forming platform may be displaced along the X and Y directions, and the printhead may be displaced along the Z direction.

[0097] In some embodiments, the 3D printer may further include a housing that defines a receiving cavity in which the print head and forming platform are both disposed. The housing separates the internal and external spaces of the 3D printer, ensuring a stable printing environment. The housing may have a door that can be opened or closed to facilitate the removal of the printed parts.

[0098] The printhead body is movable relative to the forming platform. For example, the printhead body is slidably disposed along the optical axis in the X direction, so that the printhead body can move along the X direction relative to the optical axis in the X direction, or move along the Z direction with the optical axis. The forming platform is slidably disposed along the Y direction. Thus, the printhead body and the forming platform can move relative to each other.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A hot-end device, characterized in that, include: heat sink; A throat, a portion of which is connected to the radiator; A first heat-conducting element is provided, which is spaced apart from the radiator. The first heat-conducting element has a heating hole, and another part of the throat tube is connected to the first heat-conducting element. A second heat-conducting element is connected to the first heat-conducting element, and the second heat-conducting element is at least partially located in the heating hole; A nozzle is connected to the end of the first heat-conducting element away from the radiator; The mounting base has a first opening groove, and at least a portion of the first heat-conducting element and / or the second heat-conducting element is disposed in the first opening groove.

2. The hot-end device according to claim 1, characterized in that, Also includes: The mounting plate body is fixedly connected to the mounting base; A first connecting component is used to enable a detachable connection between the mounting plate body and the heat sink.

3. The hot-end device according to claim 1, characterized in that, The first heat-conducting element includes a first section and a second section arranged circumferentially. The outer wall of the first section is in contact with the groove wall of the first opening groove, and the outer wall of the second section is not in contact with the groove wall of the first opening groove. The first section and the second section together define the heating hole.

4. The hot-end device according to claim 3, characterized in that, The second heat-conducting element is disposed at the heating hole; and One end of the second heat-conducting element is connected to the second section, and / or the second heat-conducting element extends toward the center of the heating hole.

5. The hot-end device according to claim 4, characterized in that, The other end of the second heat-conducting element is connected to the first section, and / or the extending direction of the second heat-conducting element is not parallel to the extending direction of the heating hole.

6. The hot-end device according to claim 1, characterized in that, The second heat-conducting element includes a third section located inside the heating hole and a fourth section located outside the heating hole, the fourth section being used to connect a heating element or a heating cable.

7. The hot-end device according to claim 6, characterized in that, The third section is coaxially arranged with the first heat-conducting element, and / or the fourth section is located at the end of the first heat-conducting element near the heat sink.

8. The hot-end device according to claim 7, characterized in that, The third section and the fourth section are respectively provided with a first through hole and a second through hole. The first through hole and the second through hole extend in the same direction as the heating hole, and the axes of the first through hole and the second through hole do not coincide.

9. A printhead, characterized in that, include: Printhead body; The hot-end device as described in any one of claims 1 to 8, wherein the mounting base of the hot-end device is mounted on the printhead body.

10. A 3D printer, characterized in that, include: Molding platform; The print head as described in claim 9 is movable relative to the forming platform.

Images