A 3D printing nozzle easy to disassemble

Abstract

The present application relates to the technical field of 3D printing, and particularly relates to a 3D printing nozzle easy to disassemble and assemble, comprising a throat pipe, a nozzle head, a split heating module, a quick disassembly and assembly hinge and a U-shaped part, wherein the split heating module comprises a first heating module and a second heating module. The split heating module, the quick disassembly and assembly hinge, the quick disassembly structure based on the U-shaped part and other mechanical structures solve the problems of difficult disassembly of the nozzle head of the 3D printing nozzle and easy damage of the nozzle thread, the heating module is manufactured into two symmetrical parts, the nozzle head, the heating module and the throat pipe are assembled together through the U-shaped part, the quick disassembly and replacement of the heating module and other components are facilitated, the split heating module is provided with petal-shaped first and second threaded half holes, the nozzle head can be quickly fixed, the threads of the nozzle head and the nozzle are prevented from being damaged in the process of multiple disassembly, and the magnetic adsorption device arranged in the nozzle is adopted to realize the quick replacement and fixation of the heating source.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to an easily detachable 3D printing nozzle. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a rapid prototyping technology that builds three-dimensional objects by adding materials layer by layer. Since its inception in the 1980s, 3D printing technology has been widely applied and developed. In the 3D printing process, the nozzle plays a crucial role. The nozzle is one of the core components of a 3D printer; it is responsible for precisely extruding molten printing material along a pre-defined path and depositing it onto the printing platform. Therefore, the nozzle largely determines whether a material extrusion 3D printer can successfully print an object.

[0003] Traditional nozzles consist of a nozzle head, a heating module, and a throat. In practical use, they suffer from the following main drawbacks:

[0004] 1. Difficult disassembly affects printing efficiency. During printing, material easily accumulates inside the nozzle, and once blockage occurs, the printhead needs to be cleaned. However, traditional nozzles have an integral structure, with the printhead and heating module connected by an integral thread. Disassembly generally requires cooling to a lower temperature, such as room temperature, before the printhead can be disassembled for cleaning. Furthermore, the threads become fused with the printing material, making disassembly difficult. This inevitably leads to printing interruptions and delays.

[0005] 2. The nozzle threads are easily damaged. The nozzle is a consumable part. In traditional nozzles, the nozzle is connected to the heating module by threads, which are easily damaged during repeated thermal expansion and contraction and disassembly.

[0006] 3. Improper assembly can lead to material leakage. Loose assembly between the nozzle, heating module, and throat can cause material leakage. After tightening the nozzle, it is difficult to control the precision of the gap between the nozzle and the throat.

[0007] 4. Difficult to disassemble and assemble the heating source. The heating source in traditional nozzles is fixed in the corresponding hole of the heating module by using an internal hex screw. However, since the nozzle needs to be disassembled frequently, it is very easy for the fastener to fail after repeated temperature changes and disassembly. Moreover, the internal hex screw needs to be tightened every time it is disassembled and assembled, which is cumbersome. Summary of the Invention

[0008] This application provides an easy-to-disassemble 3D printing nozzle, which solves the problems of difficult nozzle disassembly, easy damage and easy material leakage in the prior art of 3D printers, and realizes the rapid disassembly and assembly of 3D printing nozzles.

[0009] This application provides an easily detachable 3D printing nozzle, including...

[0010] The throat tube has external threads on its outer wall;

[0011] The nozzle has external threads on its upper outer wall;

[0012] The split heating module includes a first heating module and a second heating module. The first heating module has a first fastening hole that extends from left to right, a first heating hole that extends from left to right, and a first threaded half-hole that extends vertically to one side. The first fastening hole, the first heating hole, and the first threaded half-hole are not interconnected or overlapped with each other. The second heating module has a second fastening hole that extends from left to right, a second heating hole that extends from left to right, and a second threaded half-hole that extends vertically to one side. In the combined state, the first fastening hole and the second fastening hole are coaxial, the first heating hole and the second heating hole are coaxial, and the first threaded half-hole and the second threaded half-hole together form a complete threaded hole. The complete threaded hole can be threadedly engaged with the external threads of the throat and the nozzle.

[0013] A quick-release hinge includes a hinge shaft and a hinge base, wherein the hinge shaft is fixedly mounted on the first heating module and the hinge base is fixedly mounted on the second heating module;

[0014] The U-shaped component includes a crossbar and two supports located at both ends of the crossbar. The U-shaped component passes through the first fastening hole and the second fastening hole. The width between the two supports is consistent with the width of the split heating module in the left-right direction. The U-shaped component cooperates with the quick-release hinge to lock the first heating module and the second heating module.

[0015] As some embodiments of this application, the upper surface of the second heating module is further provided with a magnet mounting groove, which is in communication with the second heating hole; a magnet is provided in the magnet mounting groove.

[0016] As some embodiments of this application, the hinge shaft includes an upper shaft portion, a middle shaft portion, and a lower shaft portion, wherein the diameter of the middle shaft portion is smaller than the diameter of the upper shaft portion and the diameter of the lower shaft portion; the hinge seat includes an upper shaft seat that is hinged to the upper shaft portion and a lower shaft seat that is hinged to the lower shaft portion, wherein a quick-release opening is provided on one side of the upper shaft seat, and the width of the quick-release opening is greater than the diameter of the middle shaft portion and smaller than the diameter of the upper shaft portion.

[0017] As a preferred embodiment of this application, the upper shaft portion and the lower shaft portion have the same diameter.

[0018] As some embodiments of this application, it also includes a concave-convex structure, including protrusions on both sides of the first threaded half-hole and grooves on both sides of the second threaded half-hole. The protrusions and grooves of the concave-convex structure can cooperate to achieve rapid positioning of the split heating module after it is separated and prevent material leakage after the split heating module is reassembled.

[0019] As some embodiments of this application, the support of the U-shaped part has a chamfered portion, which facilitates the guidance and movement of the U-shaped part when locking the split heating module.

[0020] As some embodiments of this application, wear-resistant positioning blocks may also be fixedly provided on the upper and lower sides of the first and second fastening holes to facilitate positioning and guidance during the disassembly and assembly of the U-shaped parts, and at the same time to avoid wear of the U-shaped parts on the split heating module during the disassembly and assembly process.

[0021] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0022] 1. Compared with existing integral nozzles, this invention solves the problems of difficult disassembly of 3D printing nozzles and easy damage to nozzle threads by using mechanical structures such as split heating modules, quick-release hinges, and quick-release structures based on U-shaped parts.

[0023] 2. The nozzle adopts a split heating module, which facilitates quick disassembly and replacement of parts. The heating module is manufactured into two symmetrical parts, and the nozzle, heating module and throat are assembled together by U-shaped parts, which facilitates quick disassembly of the heating module and replacement of nozzles and other parts.

[0024] 3. The system adopts a quick-clamping structure based on U-shaped parts and a quick-release hinge that enables rapid assembly and disassembly, thereby achieving quick assembly, disassembly, positioning, and locking of the split heating module.

[0025] 4. The split heating module is equipped with a first threaded half-hole and a second threaded half-hole, which can quickly fix the nozzle and prevent the threads of the nozzle and spray nozzle from being damaged during repeated disassembly.

[0026] 5. Employing a convex-concave structure enables rapid positioning of the split heating module and prevents material leakage. In traditional nozzles, the nozzle head and throat cannot be perfectly aligned, causing some of the flowing molten material to leak out from the joint between the throat and nozzle. The convex-concave structure prevents material leakage while simultaneously enabling rapid positioning of the split components.

[0027] 6. The heating source in the nozzle is fixed by a magnetic adsorption device, which enables rapid fixation of the heating source. Traditional nozzles are fixed with hexagonal screws, which are cumbersome to disassemble and assemble, and are prone to stripping after repeated disassembly and assembly. This application uses a magnetic adsorption device in the nozzle to achieve rapid replacement and fixation of the heating source. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the easily detachable 3D printing nozzle according to an embodiment of this application;

[0030] Figure 2 This is a three-dimensional structural diagram of the easily detachable 3D printing nozzle in another direction according to an embodiment of this application.

[0031] Figure 3 This is an exploded three-dimensional structural diagram of the easily detachable 3D printing nozzle according to an embodiment of this application;

[0032] Figure 4 This is a three-dimensional structural diagram of the split heating module according to an embodiment of this application;

[0033] Figure 5 For this application Figure 4 A magnified view of a portion of point A in the middle;

[0034] Figure 6 This is a three-dimensional structural diagram of the second heating module according to an embodiment of this application;

[0035] Figure 7 This is a three-dimensional structural diagram of the first heating module in an embodiment of this application;

[0036] Figure 8 This is a three-dimensional structural diagram of the U-shaped part according to an embodiment of this application.

[0037] The attached figures are labeled as follows: 1. throat; 2. nozzle; 3. U-shaped part; 31. crossbar; 32. support; 33. chamfer; 4. split heating module; 41. first heating module; 411. first fastening hole; 412. first heating hole; 413. first threaded half hole; 42. second heating module; 421. second fastening hole; 422. second heating hole; 423. second threaded half hole; 424. magnet mounting slot; 5. magnet; 6. quick-release hinge; 61. hinge shaft; 611. upper shaft; 612. middle shaft; 613. lower shaft; 62. hinge seat; 621. upper shaft seat; 622. quick-release opening; 623. lower shaft seat; 7. concave-convex structure; 71. protrusion; 72. groove. Detailed Implementation

[0038] To better understand the above technical solution, the following detailed description of the specific implementation method is provided.

[0039] This embodiment describes an easily detachable 3D printing nozzle, such as... Figures 1-8 As shown, including

[0040] The throat tube 1 has external threads on its outer wall;

[0041] Nozzle 2 has external threads on its upper outer wall;

[0042] Split heating module 4, such as Figure 1 , 2 As shown in Figures 6 and 7, the heating module includes a first heating module 41 and a second heating module 42. The first heating module 41 has a first fastening hole 411 that extends from left to right, a first heating hole 412 that extends from left to right, and a first threaded half-hole 413 that extends vertically from one side. The first fastening hole 411, the first heating hole 412, and the first threaded half-hole 413 do not overlap or communicate with each other. The second heating module 42 has a second fastening hole 421 that extends from left to right, a second heating hole 422 that extends from left to right, and a second threaded half-hole 423 that extends vertically from one side. In the combined state, the first fastening hole 411 and the second fastening hole 421 are coaxial, the first heating hole 412 and the second heating hole 422 are coaxial, and the first threaded half-hole 413 and the second threaded half-hole 423 together form a complete threaded hole.

[0043] Quick-release hinge 6, such as Figure 1 , 3 As shown, it includes a hinge shaft 61 and a hinge seat 62. The hinge shaft 61 is fixedly mounted on the first heating module 41, and the hinge seat 62 is fixedly mounted on the second heating module 42.

[0044] U-shaped part 3, such as Figure 1 , 3 As shown in Figure 8, the device includes a crossbar portion 31 and two supports 32 located at both ends of the crossbar portion 31. The U-shaped part 3 passes through the first fastening hole 411 and the second fastening hole 421. The width between the two supports 32 is consistent with the width of the split heating module 4 in the left-right direction. The U-shaped part 3 cooperates with the quick-release hinge 6 to lock the first heating module 41 and the second heating module 42.

[0045] Among them, such as Figure 6 As shown, the upper surface of the second heating module 42 is also provided with a magnet mounting groove 424, which is connected to the second heating hole 422; a magnet 5 is provided in the magnet mounting groove 424.

[0046] like Figure 4 , 5As shown, the hinge shaft 61 includes an upper shaft portion 611, a middle shaft portion 612, and a lower shaft portion 613. The diameter of the middle shaft portion 612 is smaller than the diameters of the upper shaft portion 611 and the lower shaft portion 613. The hinge seat 62 includes an upper shaft seat 621 that is hinged to the upper shaft portion 611 and a lower shaft seat 623 that is hinged to the lower shaft portion 613. A quick-release opening 622 is also provided on one side of the upper shaft seat 621. The width of the quick-release opening 622 is greater than the diameter of the middle shaft portion 612 but smaller than the diameter of the upper shaft portion 611. In this embodiment, the diameters of the upper shaft portion 611 and the lower shaft portion 613 are equal.

[0047] like Figure 1 , 2 As shown in Figures 6 and 7, the system also includes a concave-convex structure 7, which includes protrusions 71 on both sides of the first threaded half-hole 413 and grooves 72 on both sides of the second threaded half-hole 423. The protrusions 71 and grooves 72 of the concave-convex structure 7 can cooperate to achieve rapid positioning of the split heating module 4 after it is separated and prevent material leakage after the split heating module 4 is reassembled.

[0048] like Figure 1 , 2 As shown in Figures 6 and 7, the support 32 of the U-shaped part 3 has a chamfered part 33, which facilitates the guidance and movement of the U-shaped part 3 when locking the split heating module 4.

[0049] Wear-resistant positioning blocks can also be fixedly installed on the upper and lower sides of the first fastening hole 411 and the second fastening hole 421 to facilitate the positioning and guidance of the U-shaped part 3 during disassembly and assembly, and at the same time avoid the wear of the U-shaped part 3 on the split heating module 4 during disassembly and assembly.

[0050] One assembly process for the easy-to-assemble 3D printing nozzle is as follows: First, grasp the first heating module 41 and the second heating module 42, and then attach the hinge shaft 61 and hinge seat 62 mounted on them as follows. Figure 4 and Figure 5The arrangement shown is such that the central shaft 612 passes through the quick-release opening 622 and is positioned within the upper shaft seat 621. Then, the first heating module 41 is moved downwards and / or the second heating module 42 is moved upwards, causing the upper shaft 611 to enter the upper shaft seat 621 and the lower shaft 613 to enter the lower shaft seat 623. This quickly achieves the hinge connection between the first heating module 41 and the second heating module 42. Then, the throat tube 1 and the nozzle 2 are placed tightly against each other within the first threaded half-hole 413 or the second threaded half-hole 423, ensuring their threads mesh. Finally, the first heating module... Module 41 and the second heating module 42 rotate and engage around the quick-release hinge 6, forming a complete threaded hole with the first threaded half-hole 413 and the second threaded half-hole 423. The concave-convex structure 7 provides positioning, ensuring full engagement between the threads of the throat 1 and the nozzle 2 and the threads of the first threaded half-hole 413 and the second threaded half-hole 423. Then, the U-shaped part 3 passes through the first fastening hole 411 and the second fastening hole 421 and is pressed down, causing the supports 32 on both sides of the U-shaped part 3 to lock the first heating module 41 and the second heating module 42. Figure 1 and Figure 2 As shown, this fixes the positions of the first heating module 41 and the second heating module 42 relative to each other. At this point, the concave-convex structure 7 prevents the molten printing substrate from overflowing when there is a gap between the throat 1 and the nozzle 2 (if properly assembled, there is no gap between the throat 1 and the nozzle 2; if there is misalignment, the concave-convex structure 7 can prevent the molten printing substrate from overflowing, thus avoiding subsequent disassembly difficulties). Then, the magnet 5 is inserted into the magnet mounting slot 424, and the heating source and thermistor are placed in their respective positions, completing the assembly of the easily detachable 3D printing nozzle. The heating source and thermistor will not easily detach under the magnetic force of the magnet, eliminating the need for additional screws for fastening.

[0051] When it is necessary to disassemble the nozzle 2 of the easy-to-disassemble 3D printing nozzle, one disassembly process is as follows: First, pull out the heating source and thermistor (since they are fixed by magnetic attraction, a slight force in the direction can overcome the magnetic attraction and pull them out); then push the U-shaped part 3 upwards, and then pull it out along the first fastening hole 411 and the second fastening hole 421. At this time, the first heating module 41 and the second heating module 42 can be rotated open around the quick-release hinge 6. Then, the nozzle 2 can be removed for replacement or cleaning. Since the nozzle 2 can be removed directly during the disassembly process, there is no need to consider the impact of thermal expansion and contraction on the threaded disassembly. Therefore, with the assistance of tools, the nozzle 2 can be disassembled at any time, eliminating the need for cooling the easy-to-disassemble 3D printing nozzle, while reducing wear on the threads and increasing service life. If it is necessary to further disassemble the first heating module 41 and the second heating module 42, force is applied to move the first heating module 41 upwards and / or the second heating module 42 downwards. Figure 4 and Figure 5The central shaft portion 612 is shown in the state where it is located inside the upper shaft seat 621. Then, the central shaft portion 612 is moved out from the quick-release opening 622 to achieve quick separation of the split heating module 4.

[0052] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0053] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An easily detachable 3D printing nozzle, characterized in that, include The throat (1) has external threads on its outer wall; The nozzle (2) has an external thread on its upper outer wall; The split heating module (4) includes a first heating module (41) and a second heating module (42). The first heating module (41) is provided with a first fastening hole (411) that runs through the left and right sides, a first heating hole (412) that runs through the left and right sides, and a first threaded half hole (413) that runs through the top and bottom on one side. The first fastening hole (411), the first heating hole (412) and the first threaded half hole (413) do not overlap with each other. The second heating module (42) is provided with a second fastening hole (421) that runs through the left and right sides, a second heating hole (422) that runs through the left and right sides, and a second threaded half hole (423) that runs through the top and bottom on one side. In the combined state, the first fastening hole (411) and the second fastening hole (421) are coaxial, the first heating hole (412) and the second heating hole (422) are coaxial, and the first threaded half hole (413) and the second threaded half hole (423) together form a complete threaded hole. The quick-release hinge (6) includes a hinge shaft (61) and a hinge seat (62). The hinge shaft (61) is fixedly mounted on the first heating module (41), and the hinge seat (62) is fixedly mounted on the second heating module (42). The U-shaped part (3) includes a crossbar (31) and two supports (32) located at both ends of the crossbar (31). The U-shaped part (3) passes through the first fastening hole (411) and the second fastening hole (421). The width between the two supports (32) is consistent with the width of the split heating module (4) in the left and right direction. The U-shaped part (3) cooperates with the quick-release hinge (6) to lock the first heating module (41) and the second heating module (42). It also includes a concave-convex structure (7), which includes a protrusion (71) on both sides of the first threaded half hole (413) and a groove (72) on both sides of the second threaded half hole (423). The protrusion (71) and groove (72) of the concave-convex structure (7) can cooperate to achieve rapid positioning of the split heating module (4) after it is split and prevent material leakage after the split heating module (4) is reassembled.

2. The easily detachable 3D printing nozzle according to claim 1, characterized in that, The upper surface of the second heating module (42) is also provided with a magnet mounting groove (424), which is in communication with the second heating hole (422); a magnet (5) is provided in the magnet mounting groove (424).

3. The easily detachable 3D printing nozzle according to claim 1, characterized in that, The hinge shaft (61) includes an upper shaft portion (611), a middle shaft portion (612), and a lower shaft portion (613). The diameter of the middle shaft portion (612) is smaller than the diameters of the upper shaft portion (611) and the lower shaft portion (613). The hinge seat (62) includes an upper shaft seat (621) that is hinged to the upper shaft portion (611) and a lower shaft seat (623) that is hinged to the lower shaft portion (613). A quick-release opening (622) is also provided on one side of the upper shaft seat (621). The width of the quick-release opening (622) is greater than the diameter of the middle shaft portion (612) and smaller than the diameter of the upper shaft portion (611).

4. The easily detachable 3D printing nozzle according to claim 3, characterized in that, The upper shaft portion (611) and the lower shaft portion (613) have the same diameter.

5. The easily detachable 3D printing nozzle according to claim 1, characterized in that, The support (32) of the U-shaped part (3) has a chamfered part (33).

6. The easily detachable 3D printing nozzle according to claim 1, characterized in that, Wear-resistant positioning blocks are fixedly installed on the upper and lower sides of the first fastening hole (411) and the second fastening hole (421).

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