3D printing extruder nozzle

Abstract

The present invention discloses a 3D printing extruder nozzle, comprising a guide post, a nozzle body, and a nozzle head. The guide post partially extends into a first end of the nozzle body, and the nozzle head partially extends into a second end of the nozzle body. Material passages are defined within the guide post, the nozzle body, and the nozzle head. A flow channel is defined on the outer wall of the nozzle body, and the flow channel extends at an angle to the direction of the material passage within the nozzle body. The technical solution of the present invention can solve the problem of conventional nozzles in which material cannot be smoothly extruded from the channel.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing extruder nozzle. Background Art

[0002] The nozzle is one of the important parts of the 3D printing extruder. When the material is extruded from the nozzle, the back pressure of the extrusion system is established to form the required cross-sectional shape of the extrudate, providing a strong guarantee for the subsequent additive manufacturing process.

[0003] While the nozzle establishes the back pressure of the extrusion system, it also needs to ensure that the material entering the nozzle is completely melted. The straight-through nozzle is not suitable for such applications, and the material in the existing nozzle cannot be extruded smoothly from the passage.

[0004] In view of this, it is necessary to propose a 3D printing extruder nozzle to solve the above defects. Summary of the Invention

[0005] The main purpose of the present invention is to provide a 3D printing extruder nozzle, which aims to solve the problem that materials cannot be extruded smoothly in the material channel of the nozzle.

[0006] To achieve the above-mentioned objectives, the present invention proposes a 3D printing extruder nozzle, which includes a guide column, a nozzle body and a nozzle, wherein the guide column partially extends into the first end of the nozzle body, and the nozzle partially extends into the second end of the nozzle body. Material channels are provided inside the nozzle body and the nozzle, and a flow channel is provided on the outer wall of the nozzle body, and the extension direction of the flow channel is arranged at an angle to the extension direction of the material channel inside the nozzle body.

[0007] Preferably, the material channel includes a first channel and a second channel, the first channel is arranged inside the nozzle body, the flow channel is connected to the first channel, the second channel is arranged inside the nozzle, and the material enters the first channel and the second channel in sequence along the flow channel.

[0008] Preferably, a plurality of the flow channels are evenly spaced along the circumferential direction on the outer wall of the nozzle body, and outlets of the plurality of the flow channels are all connected to the feed port of the first channel.

[0009] Preferably, the flow channel is arranged in a straight line along the outer wall of the nozzle body toward the material channel; or, the flow channel is arranged in a spiral line along the outer wall of the nozzle body toward the material channel.

[0010] Preferably, the surface of the nozzle body is provided with a plurality of continuous arc-shaped protrusions, and the flow channels are correspondingly provided in the recesses between the plurality of protrusions.

[0011] Preferably, a diameter of an end of the second channel away from the nozzle body is smaller than a diameter of an end of the second channel close to the nozzle body.

[0012] Preferably, the end of the guide column extending into the nozzle body is arranged in a conical shape, the inclination of the flow channel is adapted to the inclination of the cone, and the side wall of the cone is used to guide the material entering through the flow channel.

[0013] Preferably, the end of the guide column away from the nozzle body is arranged in a cone shape.

[0014] Preferably, the shape of the extrusion port of the nozzle is circular; or, the shape of the extrusion port of the nozzle is a plurality of circles arranged circumferentially; or, the shape of the extrusion port of the nozzle includes a circle and a plurality of circles arranged circumferentially of the circle; or, the shape of the extrusion port of the nozzle is three passages and the inner ends of the three passages are interconnected; or, the shape of the extrusion port of the nozzle is a plurality of radial passages and the inner ends of the plurality of passages are interconnected.

[0015] Preferably, the guide column is threadedly connected to the nozzle body, the nozzle is threadedly connected to the nozzle body, and the outer end of the nozzle body is convexly provided with a connecting thread for connecting to the barrel.

[0016] Compared with the prior art, the 3D printing extruder nozzle provided by the present invention has the following beneficial effects:

[0017] The technical solution of the present invention, by arranging the flow channel at an angle to the material channel within the nozzle body, facilitates the smooth flow of molten material from the flow channel into the material channel, preventing material accumulation and blockage, and facilitating subsequent cleaning of the flow channel. This solves the existing problem of material not being able to be smoothly extruded from the nozzle's material channel. Furthermore, the split nozzle design facilitates subsequent cleaning of the flow channel and material channel, as well as parts replacement and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a 3D printing extruder nozzle of the present invention;

[0020] Figure 2 A cross-sectional view of an embodiment of a 3D printing extruder nozzle of the present invention;

[0021] Figure 3 A side view of an embodiment of a 3D printing extruder nozzle of the present invention;

[0022] Figure 4 This is a schematic structural diagram of another embodiment of a 3D printing extruder nozzle of the present invention;

[0023] Figure 5 This is a schematic structural diagram of another embodiment of a 3D printing extruder nozzle of the present invention;

[0024] Figure 6 This is a schematic structural diagram of a first embodiment of a nozzle according to the present invention;

[0025] Figure 7 This is a schematic structural diagram of a second embodiment of a nozzle according to the present invention;

[0026] Figure 8 is a cross-sectional view of a second embodiment of a nozzle of the present invention;

[0027] Figure 9 is a side view of a second embodiment of a nozzle of the present invention;

[0028] Figure 10 This is a schematic structural diagram of a third embodiment of a nozzle according to the present invention;

[0029] Figure 11 is a cross-sectional view of a third embodiment of a nozzle of the present invention;

[0030] Figure 12 is a side view of a third embodiment of a nozzle of the present invention;

[0031] Figure 13 Schematic diagram of the structure of the fourth embodiment of the nozzle of the present invention;

[0032] Figure 14 is a cross-sectional view of a fourth embodiment of a nozzle of the present invention;

[0033] Figure 15 is a side view of a fourth embodiment of a nozzle of the present invention;

[0034] Figure 16 This is a schematic structural diagram of a fifth embodiment of the nozzle of the present invention;

[0035] Figure 17 is a cross-sectional view of a fifth embodiment of a nozzle of the present invention;

[0036] Figure 18 It is a side view of the fifth embodiment of the nozzle of the present invention.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 3D printing extruder nozzle 31 Feeding section 1 guide column 32 Extrusion section 2 Nozzle body 33 Extrusion port 21 runner 4 Material channel 22 bulge 41 First Channel 3 nozzle 42 Second channel

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Please refer to Figure 1-18 The present invention proposes a 3D printing extruder nozzle 100, which includes a guide column 1, a nozzle body 2 and a nozzle head 3. The guide column 1 partially extends into the first end of the nozzle body 2, and the nozzle head 3 partially extends into the second end of the nozzle body 2. A material channel 4 is opened inside the nozzle body 2 and the nozzle head 3. A flow channel 21 is opened on the outer wall of the nozzle body 2, and the extension direction of the flow channel 21 is set at an angle to the extension direction of the material channel 4 inside the nozzle body 2.

[0044] Specifically, the 3D printing extruder nozzle 100 is configured as a guide post 1, a nozzle body 2, and a nozzle head 3. It adopts a split design to facilitate component replacement and maintenance. The guide post 1 partially extends into the first end of the nozzle body 2 to guide the material flow toward the nozzle body 2. The nozzle head 3 partially extends into the second end of the nozzle body 2. A material channel 4 is defined within the nozzle body 2 and nozzle head 3. The feed port of the material channel 4 is located in the nozzle body 2, and the discharge port of the material channel 4 is located in the nozzle head 3.

[0045] like Figure 2 A flow channel 21 is formed on the outer wall of the nozzle body 2. The outlet of the flow channel 21 extends in an angle with the direction of extension of the material passage 4 within the nozzle body 2. In this embodiment, the angle ranges from 10 to 80 degrees. Preferably, the angle can be 30, 45, or 60 degrees.

[0046] When the 3D printing extruder nozzle 100 is working, its guide column 1 and part of the nozzle body 2 extend into the barrel (not shown in the figure). The material first flows through the guide column 1, and along the inflow channel 21 on the outer wall of the nozzle body 2, and enters the material channel 4 inside the nozzle body 2, and then enters the material channel 4 inside the nozzle head 3, and finally is extruded from the outlet of the material channel 4.

[0047] The technical solution of the present invention arranges the flow channel 21 at an angle to the material channel 4 within the nozzle body 2. The inclined flow channel 21 facilitates smooth flow of molten material from the flow channel 21 into the material channel 4, preventing material accumulation and clogging. It also facilitates subsequent cleaning of the flow channel 21, thus resolving the existing problem of material not being able to be smoothly extruded from the material channel 4 of the nozzle. Furthermore, the split design of the 3D printing extruder nozzle 100 facilitates subsequent cleaning of the flow channel 21 and the material channel 4, and facilitates the replacement and repair of parts.

[0048] As a preferred embodiment of the present invention, the material channel 4 includes a first channel 41 and a second channel 42. The first channel 41 is arranged inside the nozzle body 2, the flow channel 21 is connected to the first channel 41, and the second channel 42 is arranged inside the nozzle 3. The material enters the first channel 41 and the second channel 42 in sequence along the flow channel 21.

[0049] Specifically, the material channel 4 includes a first channel 41 and a second channel 42, which are connected. The first channel 41 is disposed within the nozzle body 2, and the feed port of the first channel 41 is connected to the outlet of the flow channel 21. Material enters the first channel 41 along the flow channel 21. The second channel 42 is disposed within the nozzle head 3, and the material enters the second channel 42 along the first channel 41 and is extruded from the outlet thereof. By arranging the flow channel 21 in conjunction with the first channel 41 and the second channel 42, the material can be extruded more smoothly from the 3D printing extruder nozzle 100.

[0050] As a preferred embodiment of the present invention, a plurality of flow channels 21 are evenly spaced along the circumferential direction on the outer wall of the nozzle body 2 , and the outlets of the plurality of flow channels 21 are all connected to the feed port of the first channel 41 .

[0051] It is noteworthy that multiple flow channels 21 are provided on the outer wall of the nozzle body 2. These channels 21 are evenly spaced along the circumference of the nozzle body 2. The outlets of these channels 21 are all connected to the feed port of the first channel 41. The provision of multiple flow channels 21 increases the material feed rate. The molten material is first divided into multiple streams and then converged together, which also facilitates homogenization of material composition and temperature, thereby improving product quality. Furthermore, the number of flow channels 21 is preferably an even number, such as 2, 4, 6, 8, or 10.

[0052] As a preferred embodiment of the present invention, the flow channel 21 is arranged in a straight line along the outer wall of the nozzle body 2 toward the material channel 4; or, the flow channel 21 is arranged in a spiral line along the outer wall of the nozzle body 2 toward the material channel 4.

[0053] Specifically, the transition form of the flow channel 21 can be set according to actual needs, as long as the extension direction of the outlet end of the flow channel 21 is inclined relative to the material channel 4 of the nozzle body 2. In one embodiment, the flow channel 21 is arranged in a straight line along the outer wall of the nozzle body 2 toward the material channel 4, that is, multiple straight flow channels 21 along the outer wall of the nozzle body 2 are divided. In another embodiment, the flow channel 21 is arranged in a spiral line along the outer wall of the nozzle body 2 toward the material channel 4, that is, multiple spiral flow channels 21 along the outer wall of the nozzle body 2 are divided.

[0054] Furthermore, a plurality of continuous arc-shaped protrusions 22 are provided on the surface of the nozzle body 2 , and the flow channels 21 are correspondingly provided in the recesses between the plurality of protrusions 22 .

[0055] In detail, a plurality of continuous arc-shaped protrusions 22 are provided on the surface of the nozzle body 2, and a flow channel 21 is correspondingly provided at the recessed portion between each two protrusions 22. When the material flows from the guide column 1 to the outer wall of the nozzle body 2, the protrusion 22 can guide the material, which is beneficial for the material to enter the flow channel 21 from the outer wall of the nozzle body 2, so that the material enters the material channel 4 from the entrance of the flow channel 21.

[0056] As a preferred embodiment of the present invention, the diameter of the second channel 42 at one end away from the nozzle body 2 is smaller than the diameter of the second channel 42 at one end close to the nozzle body 2 .

[0057] It should be understood that the diameter of the discharge port of the second channel 42 within the nozzle head 3 can be smaller than or equal to the diameter of the inlet of the second channel 42. The specific aperture setting can be set according to actual needs. In this embodiment, the diameter of the end of the second channel 42 away from the nozzle body 2 is set to be smaller than the diameter of the end of the second channel 42 close to the nozzle body 2. This can increase the pressure at the discharge port of the second channel 42, allowing the material to be extruded more smoothly from the discharge port of the second channel 42.

[0058] As a preferred embodiment of the present invention, the end of the guide column 1 extending into the nozzle body 2 is configured in a conical shape, the inclination of the flow channel 21 is adapted to the inclination of the cone, and the side wall of the cone is used to guide the material entering through the flow channel 21.

[0059] In detail, such as Figure 2 One end of the guide column 1 extends all the way into the feed port of the first channel 41 of the nozzle body 2. The end of the guide column 1 extending into the nozzle body 2 is set to a cone, and the inclined surface of the cone is flush with the flow channel 21, so as to facilitate guiding the material entering from the flow channel 21 to flow toward the second material channel 4, thereby preventing the material from accumulating at the feed port of the first channel 41.

[0060] Furthermore, the end of the guide column 1 away from the nozzle body 2 is configured in a cone shape.

[0061] It is worth noting that the end of the guide column 1 away from the nozzle body 2 is set in a cone shape. When the 3D printing extruder nozzle 100 is working, its guide column 1 and part of the nozzle body 2 extend into the interior of the barrel. The material first flows through the conical end face of the guide column 1. The guide column 1 can guide the material to flow toward the outer wall of the nozzle body 2, making the material flow smoother.

[0062] As a preferred embodiment of the present invention, the shape of the extrusion port 33 of the nozzle head 3 is circular; or, the shape of the extrusion port 33 of the nozzle head 3 is a plurality of circles arranged circumferentially; or, the shape of the extrusion port 33 of the nozzle head 3 includes a circle and a plurality of circles arranged circumferentially of the circle; or, the shape of the extrusion port 33 of the nozzle head 3 is three passages and the inner ends of the three passages are interconnected; or, the shape of the extrusion port 33 of the nozzle head 3 is a plurality of radial passages and the inner ends of the plurality of passages are interconnected.

[0063] Specifically, such as Figure 8 The nozzle 3 includes a feeding section 31 and an extrusion section 32. The extrusion port 33 is the outlet of the second channel 42 of the nozzle 3. The shape of the extrusion port 33 of the nozzle 3 is the cross-sectional shape of the extrusion section 32. The shape of the extrusion port 33 of the nozzle 3 can be set according to actual needs. The 3D printing extruder nozzle 100 of the present invention adopts a split design, and it is very convenient to replace the nozzle 3. Therefore, the nozzle 3 with different shapes of the extrusion port 33 can be selected according to actual conditions.

[0064] In the first embodiment, as Figure 6 , the shape of the extrusion port 33 of the nozzle 3 is circular. In the second embodiment, as Figure 7-9 The extrusion openings 33 of the nozzle 3 are shaped as a plurality of circles arranged around the circumference. Figure 10-12The shape of the extrusion port 33 of the nozzle 3 includes a circle and a plurality of circles arranged around the circumference of the circle. Figure 13-15 The extrusion port 33 of the nozzle 3 is shaped as three passages and the inner ends of the three passages are interconnected. The inner ends of the three passages refer to the ends at which the passages are connected, and the outer ends of the three passages are radially arranged outward. In the fifth embodiment, as Figure 16-18 The extrusion port 33 of the nozzle 3 is shaped as multiple radial passages, the inner ends of the multiple passages are interconnected, the side of each passage close to the inner end is straight, and the outer end of the passage is circular.

[0065] In addition to changing the extrusion style of nozzle 3 due to the special needs of space printing, when there are high requirements for the corrugation of the facade of the printed product, the extrusion style of nozzle 3 also needs to be changed. During 3D printing additive manufacturing, the materials are stacked up layer by layer. The larger the aperture of the extrusion nozzle, the more obvious the corrugation between layers. Reducing the aperture of the extrusion nozzle 3 is conducive to reducing the corrugation between layers, but it means a significant increase in the number of layers, longer printing time, and higher costs, because the thickness of the product is usually more than twice the aperture of the nozzle 3. Therefore, the present invention can be used as Figure 12 The nozzle 3 in the shape of the extrusion port 33 or other types of nozzles 3 can replace the most basic circular nozzle 3. Figure 12 The extrudate of the nozzle 3 shown is a melt tube, which is folded in half and spread on the printing surface of the product. While ensuring that the corrugations on the facades on both sides of the product are small, the middle part of the printing area is filled. Compared with directly using a nozzle 3 with a very small aperture, the efficiency can be greatly improved.

[0066] As a preferred embodiment of the present invention, the guide column 1 is threadedly connected to the nozzle body 2, the nozzle 3 is threadedly connected to the nozzle body 2, and the outer end of the nozzle body 2 is convexly provided with a connecting thread for connecting to the barrel (not shown in the figure).

[0067] In detail, when the 3D printing extruder nozzle 100 is working, its guide column 1 and part of the nozzle body 2 extend into the barrel. The communication mode between the nozzle body 2 and the barrel includes various methods, such as Figure 4-5 , can be connected by flange bolts, flange clamps or threads.

[0068] In this embodiment, the outer end of the nozzle body 2 is provided with a connecting thread for connecting to the barrel. The nozzle body 2 is threadedly connected to the barrel. At the same time, the guide column 1 is threadedly connected to the nozzle body 2, and the nozzle head 3 is threadedly connected to the nozzle body 2. The structure is simple, the connection is reliable, and it is easy to assemble and disassemble.

[0069] Furthermore, in this embodiment, when the nozzle body 2 is connected to the inner bore of the barrel, the thickness of the protruding connecting thread on the outer surface of the nozzle body 2 is controlled to keep the gap between the nozzle body 2 and the inner bore of the barrel small. This helps to establish the system back pressure required for extrusion and ensures that the material is fully melted before entering the material channel 4. Heat transfer between the material and the barrel maintains a certain temperature of the 3D printing extruder nozzle 100, ensuring smooth extrusion of the material without clogging.

[0070] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A 3D printing extruder nozzle, characterized in that, The 3D printing extruder nozzle includes a guide column, a nozzle body and a nozzle head, wherein the guide column partially extends into the first end of the nozzle body, and the nozzle head partially extends into the second end of the nozzle body. A material channel is formed inside the nozzle body and the nozzle head, and a flow channel is formed on the outer wall of the nozzle body. The extension direction of the flow channel is arranged at an angle to the extension direction of the material channel inside the nozzle body; Wherein, the surface of the nozzle body is provided with a plurality of continuous arc-shaped protrusions, and the flow channels are correspondingly provided at the recessed areas between the plurality of protrusions.

2. The 3D printing extruder nozzle according to claim 1, characterized in that The material channel includes a first channel and a second channel. The first channel is arranged inside the nozzle body. The flow channel is connected to the first channel. The second channel is arranged inside the nozzle. The material enters the first channel and the second channel in sequence along the flow channel.

3. The 3D printing extruder nozzle according to claim 2, wherein: The outer wall of the nozzle body is provided with a plurality of the flow channels evenly spaced along the circumferential direction, and the outlets of the plurality of the flow channels are all connected to the feed port of the first channel.

4. The 3D printing extruder nozzle according to claim 3, wherein: The flow channel is arranged in a straight line along the outer wall of the nozzle body toward the material channel; Alternatively, the flow channel is arranged along the outer wall of the nozzle body toward the material channel spiral line.

5. The 3D printing extruder nozzle according to claim 2, wherein: A diameter of an end of the second channel away from the nozzle body is smaller than a diameter of an end of the second channel close to the nozzle body.

6. The 3D printing extruder nozzle according to any one of claims 1 to 5, wherein The end of the guide column extending into the nozzle body is arranged in a cone shape, the inclination of the flow channel is adapted to the inclination of the cone, and the side wall of the cone is used to guide the material entering through the flow channel.

7. The 3D printing extruder nozzle according to any one of claims 1 to 5, wherein The end of the guide column away from the nozzle body is arranged in a cone shape.

8. The 3D printing extruder nozzle according to any one of claims 1 to 5, wherein The shape of the extrusion port of the nozzle is circular; Alternatively, the shape of the extrusion port of the nozzle is a plurality of circles arranged circumferentially; Alternatively, the shape of the extrusion port of the nozzle includes a circle and a plurality of circles arranged around the circle; Alternatively, the extrusion port of the nozzle is shaped as three passages and the inner ends of the three passages are interconnected; Alternatively, the extrusion port of the nozzle is shaped as a plurality of radial passages, and the inner ends of the plurality of passages are interconnected.

9. The 3D printing extruder nozzle according to any one of claims 1 to 5, wherein: The guide column is threadedly connected to the nozzle body, the nozzle is threadedly connected to the nozzle body, and the outer end of the nozzle body is convexly provided with a connecting thread for connecting to a barrel.

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