3D printer nozzle and 3D printing head

Abstract

The utility model discloses a 3D printer nozzle, including nozzle body, the through flow channel of inside being provided with in nozzle body, set up the core plug in nozzle body, the core plug includes sleeve, along the sleeve inner wall circumferential direction is provided with a plurality of material guide plate, and is provided according to preset interval distance between two adjacent material guide plate, and each material guide plate has a plurality of material guide surface, and a plurality of material guide plate are set around the flow channel simultaneously. Through setting the core plug, increase the contact area of nozzle interior and consumable, prolong the flow time of consumable in the nozzle, realized the melting amount of consumable in unit time, and then increase the extrusion speed, reach the purpose of increasing flow, improve the printing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, specifically to a 3D printer nozzle and a 3D printing head. Background Technology

[0002] The print head is the material output mechanism of a 3D printer. The print head generally consists of a throat, heating block, heating rod, thermal sensor, and nozzle. Its working principle is as follows: When the heating rod is powered on, it heats the heating block. Then, the printing material enters from the upper end of the throat. Usually, a 1.75 mm diameter filament is used. The filament is heated at the lower end of the throat (the part where the throat is screwed into the heating block), causing it to preheat and melt. It continues to melt and flow out through the nozzle channel. Combined with the continuous movement of the print head, the printing function is achieved.

[0003] Traditional printer nozzles use M6 threads, with a flow channel diameter of 2mm and a flow channel depth of approximately 6mm. Heat is generated by the contact between the inner wall of the entire flow channel and the filament to melt it, resulting in consistently low printing efficiency. Improving printing efficiency while keeping all other factors constant (such as the external shape of the nozzle, i.e., maintaining the diameter of the M6 ​​thread, the size of the heating block, and the heat efficiency provided by the heating rod) is a pressing issue that needs to be addressed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a 3D printer nozzle, including a nozzle body with a through flow channel. A plug is disposed within the nozzle body, and the plug includes a sleeve. Multiple guide plates are arranged circumferentially along the inner wall of the sleeve, with adjacent guide plates spaced at a preset interval. Each guide plate has multiple guide surfaces, and the multiple guide plates are simultaneously arranged around the flow channel.

[0005] Furthermore, the guide plate comprises four sets and is arranged in a spiral structure.

[0006] Furthermore, the guide plate has a first spiral section and a second spiral section from top to bottom, and the free ends of the first spiral section and the second spiral section are respectively arranged in a cross-shaped structure.

[0007] Furthermore, the guide plate has a first guide plane, a second guide plane, and a third guide arc surface, wherein the first guide plane and the second guide plane are arranged opposite to each other, and the third guide arc surface is arranged close to the flow channel.

[0008] Furthermore, an installation groove is formed inward along the end of the nozzle body, and the plug core is disposed in the installation groove and fits against the inner wall of the installation groove.

[0009] Furthermore, the guide plate and the sleeve are integrally formed.

[0010] As another aspect of this application, a 3D printing head is also provided, which includes the 3D printer nozzle described above.

[0011] The advantages of this application are: by setting a plug core, the provided 3D printer nozzle increases the contact area between the nozzle interior and the filament, prolongs the flow time of the filament in the nozzle, and achieves the goal of increasing the melting amount of the filament per unit time, thereby increasing the extrusion speed, and thus increasing the flow rate and improving printing efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of one embodiment of the nozzle of the 3D printer in this application;

[0013] Figure 2 A schematic diagram of the assembly of the plug core and the nozzle body;

[0014] Figure 3 for Figure 2 Schematic diagram of the middle guide plate structure;

[0015] Figure 4 for Figure 3 Another structural diagram of the middle guide plate;

[0016] Figure 5 for Figure 3 Schematic diagram of a single guide plate structure;

[0017] Figure 6 This is a schematic diagram of another embodiment of the guide plate;

[0018] Figure 7 This is a schematic diagram of a 3D printer structure;

[0019] Figure 8 for Figure 7 Explosion diagram.

[0020] The following are marked in the diagram: 10. Nozzle body, 101. Flow channel, 102. Mounting groove, 11. Plug core, 111. Sleeve, 112. Guide plate, 113. First spiral part, 114. Second spiral part, 115. First guide plane, 116. Second guide plane, 117. Third guide arc surface, 13. Throat, 14. Thermistor, 15. Thermistor fixing screw, 16. Heating rod, 17. Heating block, 18. Heating rod fixing screw, 19. Nozzle. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0027] See Figures 1-5 This embodiment provides a high-flow nozzle for a 3D printer, including a nozzle body 10. The nozzle body 10 adopts a V6 nozzle commonly used in 3D printers, and its upper end is tapped with an M6 thread for threaded connection with the heating block of the print head. The nozzle has a flow channel 101 that runs through the nozzle from top to bottom. The printing material melts from the upper end and then flows out from the flow channel of the nozzle.

[0028] To increase the contact area between the nozzle interior and the consumables and extend the flow time of the consumables in the nozzle, a countersunk hole with a depth of 6 mm and a diameter of 4 mm is milled at the upper end of the nozzle body 10 as an installation groove 102. A plug core 11 is provided in the installation groove 102. After the plug core 11 is inserted, its end does not protrude from the nozzle body. The plug core 11 includes a sleeve 111. Four guide plates 112 are arranged circumferentially along the inner wall of the sleeve 111. The guide plates 112 are arranged at a preset interval. The center of the entire plug core 11 still retains a flow channel that runs through it from top to bottom and is connected to the flow channel of the nozzle body below.

[0029] Preferably, all four guide plates 112 are arranged in a spiral structure. Each guide plate has a first spiral part 113 and a second spiral part 114 from top to bottom. The first spiral part 113 and the second spiral part 114 can be an integrally formed structure or a segmented structure. The curvature of the spiral surface can be set according to actual needs to increase the area of ​​the entire spiral surface. The guide plate 112 and the sleeve 111 are integrally formed. The entire plug core is prepared using powder metallurgy technology.

[0030] Traditional nozzles have a flow channel diameter of 2mm and a flow channel depth of 6mm. Therefore, the contact area between the inner wall of the flow channel and the filament is: S1 = 2πr * 6, which equals 37.68 square millimeters. Next, let's calculate the contact area between the filament and the inner wall of the nozzle after embedding the plug: S2 = 2πR * 6 + 4 * the side area of ​​the spiral guide plate. The side area of ​​a single guide plate is 14.3 square millimeters, so S2 = 56.52 + 4 * 14.3, or S2 = 128.32 square millimeters. As you can see, using an increased flow plug increases the contact area between the nozzle and the filament to three times that of a traditional nozzle. This increases the amount of filament melted per unit time, allowing it to melt faster and be extruded through the flow channel more quickly. This increases the extrusion speed, thereby increasing the flow rate and improving printing efficiency. Example

[0031] See Figure 6 This embodiment provides a high-flow nozzle for a 3D printer. The main structure of the nozzle is the same as that in Embodiment 1, and the plug also includes a sleeve. The difference lies in the structure of the guide plate. In Embodiment 1, it is a spiral structure. In this embodiment, there are also four guide plates, with a flow channel running vertically through the middle. Each guide plate is roughly rectangular in shape, specifically including a first guide plane 115, a second guide plane 116, and a third guide arc surface 117. The first guide plane 115 and the second guide plane 116 are arranged opposite to each other, and the third guide arc surface 117 is the side closest to the flow channel. Of course, the structure of the above guide plate can also be segmented, preferably an integrated structure. Example

[0032] See Figure 7 This embodiment provides a print head for a 3D printer, including a throat 13, a thermocouple 14, a thermocouple fixing screw 15, a heating rod 16, a heating block 17, a heating rod fixing screw 18, and a nozzle 19. Both ends of the throat 13 are tapped with M6 threads. The thermocouple 14 is used to detect temperature. The thermocouple fixing screw 15 uses the flange of the screw head to restrict the thermocouple from sliding out, thereby fixing the thermocouple. The heating rod 16 generally uses 24V, and common specifications include 50W, 70W, etc., for heating the heating block. The nozzle 19 adopts the nozzle structure in embodiment 1 or 2.

[0033] During installation, first screw the lower end of the throat into the heating block using the M6 ​​thread. Then screw the nozzle into the lower end of the heating block using the M6 ​​thread. The screwing depth should be such that the lower end of the nozzle's M6 relief groove is about 1 mm from the lower end of the heating block. At this point, tighten the throat and nozzle. Since the throat is screwed from top to bottom and the nozzle from bottom to top, when the lower end face of the throat contacts the upper end face of the nozzle, the two surfaces will fit tightly together during the tightening process to seal the flow channel and prevent the consumable 12 from melting and leaking out. Then, insert the heating rod and screw the heating rod fixing screw into the heating block to make the heating block hold the heating rod tightly. This allows the heating rod to provide heat to the heating block through close contact after being energized. Finally, install the thermistor and screw the thermistor fixing screw into the heating block to restrict the thermistor's sliding and fix it in place.

[0034] After the heating rod is powered on, it heats the heating block. At this time, consumable 12 is fed in. The consumable is heated at the lower end of the throat tube (the part screwed into the heating block) to preheat and melt it. It continues to melt and flow out through the nozzle channel. The printing function is achieved by the continuous movement of the print head.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 3D printer nozzle, comprising a nozzle body, wherein a through-flow channel is formed within the nozzle body, characterized in that: The nozzle body is provided with a plug core, the plug core includes a sleeve, and multiple guide plates are arranged circumferentially along the inner wall of the sleeve. Adjacent guide plates are arranged at a preset interval distance, each guide plate has multiple guide surfaces, and multiple guide plates are arranged around the flow channel at the same time.

2. A 3D printer nozzle according to claim 1, characterized in that: The guide plates consist of four sets, arranged in a spiral structure.

3. A 3D printer nozzle according to claim 2, characterized in that: The guide plate has a first spiral section and a second spiral section from top to bottom, and the free ends of the first spiral section and the second spiral section are respectively arranged in a cross shape.

4. A 3D printer nozzle according to claim 1, characterized in that: The guide plate has a first guide plane, a second guide plane, and a third guide arc surface, wherein the first guide plane and the second guide plane are arranged opposite to each other, and the third guide arc surface is arranged close to the flow channel.

5. A 3D printer nozzle according to claim 1, characterized in that: An installation groove is formed inward along the end of the nozzle body, and the plug is disposed in the installation groove and fits against the inner wall of the installation groove.

6. A 3D printer nozzle according to claim 3 or 4, characterized in that: The guide plate and the sleeve are integrally formed.

7. A 3D printing head, characterized in that: Includes the 3D printer nozzle as described in any one of claims 1-6.

Images