Hot melting nozzle and 3D printer

Abstract

According to the hot melting nozzle and the 3D printer, the consumable melting efficiency can be improved, a melting runner is arranged in the hot melting nozzle, a movable part is further arranged in the hot melting nozzle, a driving assembly corresponding to the movable part in position is connected to the outer side of the hot melting nozzle, and the movable part comprises a cutting blade part and a connecting runner; the connecting runner is in sealed communication with the melting runner, and the driving assembly is configured to be used for driving the movable part to move relative to the melting runner.

Description

Technical Field

[0001] The present disclosure relates to the technical field of 3D printers, in particular to a hot melt nozzle and a 3D printer. Background Art

[0002] The nozzle of an FDM (Fused Deposition Modeling) 3D printer is used to melt and extrude molten solid filaments. Specifically, the solid filament enters the nozzle under the action of an external force, where it is heated and melted, and then extruded from the nozzle outlet, gradually accumulating layer by layer to create a 3D model.

[0003] In the related art, a heat conductor is provided inside the flow channel of the nozzle, which can accelerate the melting of the consumables or melt the consumables in parts, thereby preventing the inner core of the consumables from being insufficiently melted and resulting in a hard core.

[0004] However, as the printing speed increases, when the extrusion rate of the filament is high, the internal thermal conductor of the runner cannot obtain more heat due to heat transfer problems. The thermal conductor has limited melting capacity of the inner core of the filament, making it difficult to melt the hard core of the filament quickly. The filament is heated unevenly. At the same time, the internal thermal conductor will increase the feeding resistance of the filament to a certain extent, thereby reducing the feeding speed. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide a hot melt nozzle and a 3D printer to improve the melting efficiency of the hard core of the consumable material.

[0006] A hot melt nozzle, wherein a melting flow channel is provided inside the hot melt nozzle, and a movable part is also provided inside the hot melt nozzle. A driving component is connected to the outside of the hot melt nozzle, and the position of the driving component corresponds to the movable part. The movable part includes a cutting blade and a connecting flow channel, and the connecting flow channel is sealed and connected to the melting flow channel. The driving component is configured to drive the movable part to move relative to the melting flow channel.

[0007] In some embodiments, the movable part includes a magnetic part; the driving assembly includes a magnetic driving part, and the magnetic driving part is used to provide an electromagnetic force to drive the movable part to rotate around its own axis or to move. In some embodiments, the driving assembly includes an output part, and the output part is transmission-connected with the movable part to drive the movable part to move; the output part is a rotating part that can rotate around its own axis, and the rotating part is transmission-connected with the movable part to drive the movable part to rotate; or, the output part is transmission-connected with the movable part to drive the movable part to reciprocate.

[0008] In some embodiments, the output portion is connected to a first gear, the movable member is connected to a second gear, and the second gear is engaged with the first gear; the second gear and the hot melt nozzle are sealed by an end face of a sealing ring.

[0009] In some embodiments, the movable part and the hot melt nozzle are in sliding friction contact or rolling friction contact.

[0010] In some embodiments, in the conveying direction of the melting flow channel, the melting flow channel includes a first melting channel and a second melting channel, and the movable member is located between the first melting channel and the second melting channel.

[0011] In some embodiments, the movable part has a through hole, and a plurality of blades serving as the cutting edge portion are arranged circumferentially spaced in the through hole. One ends of the plurality of blades are gathered and connected at the axis of the through hole, and the other ends are connected to the inner wall of the through hole. The intervals between adjacent blades constitute a part of the connecting flow channel.

[0012] In some embodiments, the connecting flow channel passes through the movable member, and the cutting blade is provided at an inlet end of the connecting flow channel.

[0013] In some embodiments, a plurality of the connecting flow channels are provided, and the edges of the inner walls of the connecting flow channels are circumferentially concave and convex to form the cutting edge portion, and two adjacent connecting flow channels share at least one cutting edge portion.

[0014] A 3D printer comprises the hot melt nozzle.

[0015] In the present disclosure, the movable parts can break up and stir the consumables to disperse them, thereby reducing the consumables' propulsion resistance on the one hand, and increasing the contact area with the heating channel on the other hand, so that the consumables are heated evenly, which can improve the melting efficiency of the consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural diagram of a hot melt nozzle according to an embodiment of the present disclosure.

[0017] Figure 2 for Figure 1 AA cross-sectional view.

[0018] Figure 3 This is a schematic structural diagram of a first embodiment of a movable part.

[0019] Figure 4 Schematic diagram of the structure of the second embodiment of the movable part.

[0020] Figure 5 It is a structural schematic diagram of the third embodiment of the movable part.

[0021] Figure 6 This is a cross-sectional view of a hot melt nozzle according to another embodiment of the present disclosure.

[0022] Figure 7Schematic diagram of the structure of the fourth embodiment of the movable part.

[0023] Figure 8 for Figure 7 Exploded view of the movable parts.

[0024] Figure 9 This is a front view of the hot melt nozzle according to another embodiment of the present disclosure.

[0025] Figure 10 This is a side structural diagram of a hot melt nozzle according to another embodiment of the present disclosure.

[0026] Figure 11 for Figure 10 BB cross-sectional view.

[0027] Reference numerals:

[0028] 100. Hot melt nozzle; 101. Melting flow channel; 10. Nozzle body; 110. First melting channel; 120. First sealing ring; 20. Preheating part; 210. Second melting channel; 220. Groove; 230. Second sealing ring; 30. Moving part; 310. Cutting edge; 320. Connecting flow channel; 330. Magnetic part; 340. Blade; 350. Main body; 360. Rolling part; 361. Outer ring; 362. Inner ring; 363. Ball; 370. Second gear; 40. Driving assembly; 410. Magnetic driving part; 420. Output part; 430. First gear; 50. Connecting assembly; 510. First connecting part; 520. Throat; 530. Second connecting part; 60. Heating source; 70. Nozzle. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present disclosure more clearly understood, specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.

[0030] In the description of the present disclosure, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial X", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this disclosure, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] One embodiment of the first aspect of the present disclosure provides a hot melt nozzle 100 for receiving and melting solid filamentary consumables (hereinafter referred to as consumables) before extruding them from a nozzle outlet. The hot melt nozzle 100 disclosed herein can be used in any industry requiring a hot melt nozzle 100, such as 3D printing, spinning, thermal spraying, and so on.

[0033] like Figure 1 、 Figure 2 As shown, the hot melt nozzle 100 includes a nozzle body 10 and a preheating element 20 disposed at the front end of the nozzle body 10. A first melting channel 110 is provided within the nozzle body 10, and a second melting channel 210 is provided within the preheating element 20. The first melting channel 110 and the second melting channel 210 constitute a melt flow channel 101, which serves as a heating channel for heating consumables. The second melting channel 210 is used to receive and heat the consumables. The heated consumables are then pushed into the first melting channel 110 under the action of an external force and heated and melted. The molten consumables then flow out of the nozzle body 10 under the action of an external force.

[0034] The first melting channel 110 of the nozzle body 10 is used to heat and melt the consumable material inside. The front end of the nozzle body 10 refers to the end of the nozzle body 10 that receives the consumable material. The first melting channel 110 of the preheating element 20 is used to heat and soften the consumable material. Optionally, both the nozzle body 10 and the preheating element 20 are made of a material with high thermal conductivity, such as copper or aluminum.

[0035] A movable member 30 is also provided within the hot melt nozzle 100, and a drive assembly 40 is connected to the outside of the hot melt nozzle 100. The movable member 30 is movably disposed between the second melt channel 210 and the first melt channel 110 relative to the preheating element 20. The movable member 30 includes a cutting edge 310 and a connecting flow channel 320, which connects the second melt channel 210 with the first melt channel 110. The drive assembly 40 is specifically connected to the outside of the nozzle body 10 and is positioned corresponding to the movable member 30. The drive assembly 40 is used to drive the movable member 30 relative to the preheating element 20.

[0036] The connecting channel 320 of the movable member 30 connects the second melt channel 210 with the first melt channel 110. Thus, when the preheated consumable is pushed forward by an external force, it first passes through the connecting channel 320 and then enters the first melt channel 110 of the nozzle body 10. There may be one or more connecting channels 320. The cutting edge 310 of the connecting channel 320 may be provided at the inlet end of the connecting channel 320 or on the wall of the connecting channel 320, or the entire wall of the connecting channel 320 may comprise the cutting edge 310.

[0037] In this embodiment, the movable member 30 can move relative to the preheating member 20 by rotating about its own axis or by reciprocating. The movable member 30 can rotate within a range of 360° or less, such as within a range of 180°. The reciprocating motion can be either translational or rotational.

[0038] In this embodiment, the driving assembly 40 drives the movable member 30 to rotate or reciprocate around its own axis through electromagnetic force. Figure 2 、 Figure 3 As shown, the movable member 30 includes a magnetic portion 330. The driving assembly 40 includes a magnetic driving member 410, which is used to provide an electromagnetic force to drive the movable member 30 to rotate around its own axis or to reciprocate.

[0039] Optionally, the movable member 30 includes a body 350 having the aforementioned connecting flow channel 320. Multiple magnetic portions 330 are evenly distributed along the circumference of the outer periphery of the body 350. Optionally, the magnetic portions 330 are annular structures fixed to the outer periphery of the body 350. Specifically, the magnetic portions 330 may be magnets or lodestones. In this case, the body 350 may be made of a non-magnetic material.

[0040] The magnetic driving component 410 may be, for example, a stator coil or an electromagnet, and generates a magnetic field when energized.

[0041] Optional, such as Figure 4 and Figure 5As shown, the main body 350 of the movable part 30 is made of a high temperature resistant magnetic material, so that the entire movable part 30 is the magnetic part 330. Optionally, only the outer periphery of the main body 350 of the movable part 30 is made of a high temperature resistant magnetic material. The high temperature here refers to the heating and melting temperature of the consumables.

[0042] like Figure 1 、 Figure 2 As shown, the hot melt nozzle 100 also includes a connecting assembly 50, one end of which is connected to the inlet of the second melting channel 210 and the other end of which is opposite to the extrusion wheel (not shown) used to transport the consumables. The connecting assembly 50 is used to provide guidance for the incoming consumables and isolate the heat conduction of the high-temperature preheating element 20.

[0043] Furthermore, the connection assembly 50 includes a first connector 510, a throat 520, and a second connector 530. Both the first connector 510 and the second connector 530 are hollow tubular structures, with the throat 520 connecting the first connector 510 and the second connector 530 in the middle. The first connector 510 is threadedly connected to the inlet of the second melting channel 210, and the second connector 530 is used to connect to the output end of the consumables delivery device.

[0044] like Figure 1 、 Figure 2 As shown, the hot melt nozzle 100 further includes a heating source 60. The heating source 60 is connected to the outside of the nozzle body 10 and the preheating member 20. Furthermore, the heating source 60 is sleeved on the outside of the nozzle body 10 and the preheating member 20, and the length of the heating source 60 is consistent with the total length of the nozzle body 10 and the preheating member 20.

[0045] like Figure 1 、 Figure 2 As shown, the hot melt nozzle 100 further includes a nozzle head 70. The nozzle head 70 is connected to the bottom end of the nozzle body 10, and the nozzle head 70 is used to extrude the melted consumable material according to the shape of the nozzle head 70.

[0046] When the hot melt nozzle 100 is in use, the consumables are pushed through the hot melt nozzle 100 through four processes in sequence: preheating, crushing and stirring, heating, and extrusion. Specifically: after the consumables enter the second melting channel 210, they are first preheated and softened to become highly elastic; then the movable part 30 rotates under the drive of the external magnetic field generated by the driving component 40, and the cutting blade 310 can crush the consumables and stir the consumables at the same time. After preheating the consumables, the hardness of the consumables can be reduced. In the process of the movable part 30 crushing the consumables, the requirements for external driving power are reduced, thereby reducing the volume of the external driving magnetic field, reducing the inertia of the hot melt nozzle 100 during operation, and making the structure and operation of the hot melt nozzle 100 more stable.

[0047] The cut hard core of the consumable material is evenly dispersed and continues to move downward to reach the first melting channel 110 of the nozzle body 10. Since the surface area of the crushed consumable material increases, the contact area of the nozzle body 10 increases, and the heat transfer distance becomes shorter, the melting speed is increased; the melted consumable material is extruded through the nozzle 70.

[0048] Specifically, according to the thermodynamic formula for heat conduction, the amount of heat received by the filament is Q=kΔT / R=ΔT*λ*S / L, where R= / (λ*S); Q: heat (w), ΔT: temperature difference (k); R: thermal resistance (k / w), L: filament thickness (m); λ: thermal conductivity [w / (mK]); S: area (m2). As can be seen from the above formula, the larger the heated area S of the filament and the shorter the central heat conduction distance, the faster it heats and the faster it melts.

[0049] In the hot melt nozzle 100 disclosed in the present invention, the surface area of the crushed consumables is increased, the heat transfer distance is shortened, and the contact area with the melting flow channel 101 is increased. According to the above formula, the heat transferred is large and the melting rate of the consumables is high. In addition, the consumables melt quickly, and there are fewer hard obstacles when the consumables are pushed forward. The consumables push resistance is small, the pushing speed is fast, and the molten consumables extruded from the nozzle 70 have a large flow rate and a high rate, which can meet the needs of fast printing. In other alternative embodiments, the movable part 30 is arranged at the front end of the melting flow channel 101. For example, the movable part 30 is arranged between the first connecting part 510 and the nozzle body 10. After the movable part 30 breaks the consumables, the consumables continue to push down and reach the melting flow channel 101, where they can be evenly heated, thereby providing high efficiency in melting the hard core of the consumables.

[0050] In alternative embodiments, the movable member 30 is disposed at the rear end of the melt channel 101. For example, the movable member 30 is disposed between the nozzle head 70 and the nozzle body 10. After the melt channel 101 heats the consumable material, the movable member 30 breaks the heated consumable material into pieces. This allows the consumable material to flow out of the movable member 30 and be further heated in the heating channel of the nozzle head 70, thereby improving the efficiency of hard core melting.

[0051] When the movable member 30 is disposed at the front end or the rear end of the melting flow channel 101 , the nozzle body 10 and the preheating member 20 may also be integrally formed.

[0052] In some embodiments, reference Figure 3 and Figure 4 As shown, the movable part 30 has a through hole, in which a plurality of blades 340 serving as cutting edges 310 are arranged at intervals along the circumferential direction. One ends of the plurality of blades 340 are gathered and connected at the axis of the through hole, and the other ends are connected to the inner wall of the through hole. The intervals between adjacent blades 340 constitute a part of the connecting channel 320.

[0053] Optionally, four blades 340 are provided in the through hole of the movable member 30. The blades 340 themselves are spiral-shaped. When the movable member 30 rotates, the blades 340 can cut and crush the consumables. The number of blades 340 is not limited to four, and can be two, three, or more than four.

[0054] In other embodiments, reference Figure 5 As shown, the connecting channel 320 passes through the movable member 30, and the cutting blade 310 is provided at the inlet end of the connecting channel 320. The inlet end of the connecting channel 320 refers to the end of the connecting channel 320 that receives the consumables. Specifically, the cutting blade 310 is provided at the end of the connecting channel 320 that faces the preheating member 20.

[0055] Furthermore, the edge of the inner wall of the connecting flow channel 320 is arranged to be concave and convex in the circumferential direction to form the cutting edge portion 310 .

[0056] Further, Figure 5 As shown, a plurality of connecting flow channels 320 are provided, and adjacent connecting flow channels 320 share at least one cutting edge portion 310. In this way, when the aperture of the connecting flow channels 320 is constant, the gaps between adjacent cutting edges 310 are small, and a relatively dense cutting edge portion 310 can be formed on the surface of the movable member 30 facing the preheating member 20, which has a better cutting and shredding effect on the consumables.

[0057] The connecting channel 320 and the cutting edge 310 on the movable member 30 are not limited to the two configurations described above. In some embodiments, the magnetic drive member 410 is a stator coil, and the movable member 30 is positioned within the space enclosed by the stator coil. The position of the stator coil should correspond to the radial direction of the hot melt nozzle 100, so that the movable member 30 is within the magnetic field generated by the stator coil.

[0058] Taking the movable part 30 as an example, which is entirely made of magnetic material, it has NS polarity after magnetization (the NS pole direction is the radial direction). After being affected by the magnetic field generated by the external stator coil, the NS pole of the movable part 30 changes with the change of the magnetic field generated by the stator coil (following the principle that like poles repel and opposite poles attract). When the magnetic field generated by the stator coil changes alternately in a circular pattern, the movable part 30 realizes rotational motion. When the magnetic field generated by the stator coil changes alternately in NS pole, the movable part 30 realizes reciprocating motion. Optionally, the reciprocating motion of the movable part 30 can be linear reciprocating motion or rotational reciprocating motion based on a certain axis.

[0059] Optionally, the stator coil is sleeved on the outside of the heating source 60. The stator coil is directly installed on the outside of the preheating element 20 or the nozzle body 10, which is convenient to install.

[0060] In some embodiments, reference Figure 2The nozzle body 10 is sealedly connected to the preheating element 20, and the movable member 30 is disposed in a groove 220 on the preheating element 20 or the nozzle body 10. The connection method between the nozzle body 10 and the preheating element 20 is not limited to threads, interference fit, welding, etc. When the drive assembly 40 drives the movable member 30 to rotate or reciprocate about its own axis through electromagnetic force, the preheating element 20 is made of a non-magnetic conductive material to facilitate the entry of external magnetic fields.

[0061] In one example, the movable member 30 is disposed in a groove 220 on the bottom surface of the preheating member 20. The groove 220 connects the first melt channel 110 and the second melt channel 210. The groove 220 also forms part of the melt flow channel 101. The movable member 30 is located within the hot melt nozzle 100 and within the melt flow channel 101. The drive assembly 40 drives the movable member 30 to rotate about its own axis through electromagnetic force. The drive assembly 40 does not contact the movable member 30, thereby preventing leakage of consumables as they pass through the movable member 30.

[0062] In some embodiments, the movable member 30 is in sliding friction contact with the nozzle body 10 and the preheating member 20 , or the movable member 30 is in rolling friction contact with at least one of the nozzle body 10 and the preheating member 20 .

[0063] Optional, reference Figure 2 、 Figure 3 As shown, the top of the movable member 30 is in sliding friction contact with the preheating member 20, and the bottom of the movable member 30 is in sliding friction contact with the nozzle body 10. The top and bottom of the movable member 30 are both set to have as little roughness as possible.

[0064] Optional, reference Figures 6 to 8 As shown, the movable member 30 is in rolling friction contact with the preheating member 20 .

[0065] Furthermore, the movable member 30 includes a body 350 having a connecting flow channel 320 and a rolling member 360 connected to the body 350. The rolling member 360 includes an outer ring 361, an inner ring 362, and a plurality of balls 363 disposed between the outer ring 361 and the inner ring 362. The body 350 is sleeved and fixed to the outer ring 361, and the space enclosed by the connecting flow channel 320 and the inner ring 362 is connected in the axial direction of the inner ring 362. In other words, in the axial direction of the inner ring 362, the rolling member 360 is at least partially embedded in the body 350 from one end of the body 350 and is located on one side of the connecting flow channel 320.

[0066] The movable part 30 utilizes the balls 363 to realize rolling friction contact with the preheating part 20. Specifically, Figure 6As shown, the movable member 30 is installed in the groove 220 of the preheating member 20, and one end of the rolling member 360 provided on the movable member 30 faces the preheating member 20. During the rotation of the movable member 30, the inner ring 362 serves to fix the outer ring 361 and the movable member 30. The balls 363 roll between the outer ring 361 and the inner ring 362 and contact the preheating member 20, thereby causing the outer ring 361 and the movable member 30 to rotate together.

[0067] When the movable member 30 and the nozzle body 10 are in rolling friction contact, the rolling member 360 is provided at one end of the main body 350 facing the nozzle body 10 .

[0068] When the movable member 30 is disposed at the front end or the rear end of the melting flow channel 101 , the movable member 30 and the nozzle body 10 can still adopt the above-mentioned sliding friction or rolling friction contact.

[0069] like Figures 9 to 11 As shown, a hot melt nozzle 100 is provided according to another embodiment of the first aspect of the present disclosure, in which the movable part 30 is in sealed contact with the nozzle body 10 and the preheating part 20; the driving assembly 40 includes an output part 420, which is movably connected to the movable part 30 to drive the movable part 30 to move relative to the preheating part 20.

[0070] In this embodiment, the movable member 30 can be any hard material that can crush consumables. The driving assembly 40 is a power source that directly drives the movable member 30 through a contact transmission method to enable it to move.

[0071] Optionally, the output portion 420 is a rotating member capable of rotating about its own axis, and is in transmission connection with the movable member 30 to drive the movable member 30 to rotate. In one example, the output portion 420 is connected to a first gear 430. A second gear 370 is fixed to the outer periphery of the body 350 of the movable member 30, and the second gear 370 meshes with the first gear 430.

[0072] Optionally, a first sealing ring 120 is provided in the nozzle body 10, and a second sealing ring 230 is provided in the preheating element 20. The first sealing ring 120 and the second sealing ring 230 are located on both sides of the second gear 370 and are in sealing contact with the end surface of the second gear 370.

[0073] Optionally, the output portion 420 is a reciprocating member that is in transmission connection with the movable member 30 to drive the movable member 30 to reciprocate. In one example, the output portion 420 is a piston that can reciprocate. In another example, the output portion 420 is a slider in a crank slider mechanism.

[0074] In addition, the heating source 60 is configured to avoid the transmission connection between the output portion 420 and the movable member 30. Optionally, the heating source 60 is divided into two sections, which are respectively externally connected to the preheating member 20 and the nozzle body 10, with a gap between the upper and lower sections.

[0075] The other parts of the hot melt nozzle 100 may be similar to Figures 1 to 8 The overall structure of the hot melt nozzle 100 shown in any embodiment.

[0076] In other alternative embodiments, when the movable part 30 is disposed at the front end or the rear end of the melting channel 101 , only one end face of the second gear 370 is sealed with the end face of the hot melt nozzle 100 through the sealing ring.

[0077] An embodiment of the second aspect of the present disclosure provides a 3D printer, which includes the hot melt nozzle 100 and a throat 520 according to any of the above embodiments, and the throat 520 is connected to the melting flow channel 101.

[0078] The working process of the 3D printer disclosed in this disclosure is as follows:

[0079] The 3D printer is started, and the filament is fed into the hot melt nozzle 100 through the throat 520. The filament undergoes four steps as it is pushed through the hot melt nozzle 100: preheating, crushing and stirring, heating, and extrusion. Specifically, the filament is preheated after entering the second melt channel 210. The movable member 30 then moves under the drive assembly 40, and the cutting blade 310 crushes the filament. The crushed filament continues to melt as it is pushed through the first melt channel 110, and is finally extruded from the nozzle 70.

[0080] In the 3D printer disclosed herein, the movable part 30 can break up and stir the consumable material to disperse the consumable material, thereby reducing the consumable material propulsion resistance on the one hand, and increasing the contact area between the consumable material and the heating channel on the other hand, so that the consumable material is heated evenly and the melting efficiency of the consumable material can be improved.

[0081] Furthermore, the movable member 30 is positioned in the middle of the hot melt nozzle 100, with melt channels 101 on both sides. This allows the consumables to be preheated and softened into a highly elastic state after entering the hot melt nozzle 100, allowing the movable member 30 to effectively pulverize the softened consumables. This process reduces the external drive power required by the movable member 30, reduces the inertia of the hot melt nozzle 100 during operation, and makes the hot melt nozzle 100 more stable.

[0082] In this disclosure, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0083] In this disclosure, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions appear, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, the phrase "above," "above," and "above" a first feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The phrase "below," "below," and "below" a first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0084] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this disclosure are for illustrative purposes only and do not represent the only embodiment.

[0085] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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.

[0086] The above embodiments merely illustrate several implementations of the present disclosure, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art would be able to make numerous variations and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A hot melt nozzle, wherein a melting flow channel is provided in the hot melt nozzle, characterized in that: A movable part is also provided in the hot melt nozzle, and a driving component is connected to the outside of the hot melt nozzle, the position of which corresponds to the movable part. The movable part includes a cutting blade and a connecting flow channel, and the connecting flow channel is sealed and connected to the melting flow channel. The driving component is configured to drive the movable part to move relative to the melting flow channel.

2. The hot melt nozzle according to claim 1, characterized in that The movable part includes a magnetic portion; the driving assembly includes a magnetic driving part, and the magnetic driving part is used to provide an electromagnetic force to drive the movable part to rotate around its own axis or to perform reciprocating motion.

3. The hot melt nozzle according to claim 1, characterized in that The driving assembly includes an output part, which is in transmission connection with the movable part to drive the movable part to move; the output part is a rotating part that can rotate around its own axis, and the rotating part is in transmission connection with the movable part to drive the movable part to rotate; or, the output part is in transmission connection with the movable part to drive the movable part to reciprocate.

4. The hot melt nozzle according to claim 3, characterized in that: The output portion is connected to a first gear, the movable member is connected to a second gear, and the second gear is meshed with the first gear; the second gear and the hot melt nozzle are sealed by an end face of a sealing ring.

5. The hot melt nozzle according to claim 1, characterized in that The movable part is in sliding friction contact or rolling friction contact with the hot melt nozzle.

6. The hot melt nozzle according to claim 1, characterized in that In a conveying direction of the melting flow channel, the melting flow channel includes a first melting channel and a second melting channel, and the movable member is located between the first melting channel and the second melting channel.

7. The hot melt nozzle according to claim 1, characterized in that The movable part has a through hole, in which a plurality of blades serving as the cutting edge are arranged at intervals along the circumferential direction. One ends of the plurality of blades are gathered and connected to the axis of the through hole, and the other ends are connected to the inner wall of the through hole. The intervals between adjacent blades constitute a part of the connecting flow channel.

8. The hot melt nozzle according to claim 1, characterized in that The connecting flow channel passes through the movable member, and the cutting blade is arranged at the inlet end of the connecting flow channel.

9. The hot melt nozzle according to claim 8, characterized in that There are multiple connecting flow channels, and the edges of the inner walls of the connecting flow channels are circumferentially concave and convex to form the cutting edge portion, and two adjacent connecting flow channels share at least one cutting edge portion.

10. A 3D printer, characterized in that: Comprising the hot melt nozzle according to any one of claims 1-9.

Images