Collimation type grid nozzle and 3D printer

Abstract

The utility model provides a collimation type grid nozzle and a 3D printer. The collimation type grid nozzle comprises a nozzle body. The consumable molten pool is formed in the top of the nozzle body and used for heating consumables to be in a liquid state; and the collimation mesh holes are formed in the nozzle body, the collimation mesh holes communicate with the consumable molten pool, metal mesh objects are arranged in the collimation mesh holes, and the collimation mesh holes are used for improving the adhesive force of consumables. The collimation mesh holes formed in the collimation type grid nozzle can enlarge the attachment area of liquid consumables, it is guaranteed that the liquid consumables do not drop, adhesion force distribution is more uniform, the wiredrawing phenomenon does not occur in the printing process, and defects do not occur in the next printing position. And meanwhile, in the state that the adhesion force is uniformly distributed, the pressure of the liquid consumables sprayed out of the nozzle is more uniform, and the internal structure of a printed workpiece is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printer nozzles, in particular to a collimated grid nozzle and a 3D printer. Background Art

[0002] As my country's economic construction continues to make new progress, 3D printing technology has developed rapidly. The nozzle is a very important component of a 3D printer. The printing material is melted at high temperature and then ejected through the nozzle to form a three-dimensional product. For 3D printing nozzles, domestic scientific researchers have proposed many innovative solutions from different angles:

[0003] Publication No. CN117428889A proposes a method for preventing deposits at the nozzle plate of a 3D printer and a 3D printer. By increasing the saturation level of the carrier liquid of the printing liquid in the air in front of the nozzle plate, it is possible to prevent external dust impurities from entering the nozzle when the nozzle is not in use and causing blockage, so that subsequent nozzle printing can be used normally.

[0004] Publication No. CN117601426A proposes a fast-melting nozzle for a 3D printer, which enables the consumables of the 3D printer nozzle to be fully melted by increasing the heating area of ​​the consumables.

[0005] Publication No. CN116533516A proposes a 3D printer nozzle and a 3D printing device, which solves the problem that the material first extruded from the nozzle in the existing 3D printing process will present a taper that affects the size of the product by sliding a sleeve between the feed pipe and the barrel.

[0006] Publication No. CN116330655A proposes a 3D printer nozzle and a 3D printer thereof, which reduces the difficulty of replacing the nozzle for the staff through the cooperation of the gear and gear ring structure.

[0007] Publication No. CN219564145U proposes a 3D printer nozzle with stable heating and heat dissipation. The nozzle is uniformly heated by a spiral heating wire arranged in the inner heating tube, effectively preventing the nozzle from being blocked by consumables due to uneven heating. The throat is stably cooled by the heat dissipation fins and water-cooled heat pipes spirally arranged on the throat.

[0008] The current FDM3D printer nozzle is a round hole nozzle, which is suitable for most small 3D printers. However, for large 3D printers, a larger printing format and printing speed are required, which requires the printing nozzle diameter to be larger. The large-caliber nozzle has the following problems in practical applications: due to the large nozzle diameter (the nozzle diameter of large 3D printers is generally greater than 1mm, and the nozzle of high-speed 3D printers is 5-10mm), the consumables are liquid at the nozzle during printing; when the nozzle diameter is small, the liquid consumables will not drip under gravity during the idle movement of the printer, and no wire drawing will occur. However, as the nozzle diameter increases, the surface tension of the liquid consumables cannot support the gravity of the liquid consumables in the nozzle, causing the liquid consumables to drip under the action of gravity, which in turn causes serious wire drawing on the surface of the printed workpiece. As mentioned above, the liquid consumables at the nozzle will drip during the idle movement of the printer, and when entering the printing state again, it will inevitably cause a loss of material volume, thereby causing workpiece defects.

[0009] Since the liquid consumables have a certain adhesion to the inner surface of the nozzle, the adhesion of the liquid consumables away from the inner surface to the inner surface of the nozzle will be reduced, resulting in inconsistent pressure and flow rate of the liquid consumables at the center of the nozzle and the liquid consumables at the inner surface, which leads to differences in the bonding strength inside and outside the printed lines, resulting in uneven internal structure of the final printed workpiece. Utility Model Content

[0010] In view of the above problems, the utility model proposes a collimated grid nozzle and a 3D printer to solve the above defects of the prior art.

[0011] In order to achieve the purpose of the utility model, the utility model is implemented through the following technical solutions:

[0012] In a first aspect, a collimated grid nozzle is provided, comprising:

[0013] Nozzle body;

[0014] A consumable molten pool is provided on the top of the nozzle body and is used to heat the consumable to a liquid state;

[0015] The collimating mesh is arranged inside the nozzle body, the collimating mesh is connected with the consumable molten pool, a metal mesh is arranged inside the collimating mesh, and the collimating mesh is used to improve the adhesion of the consumable.

[0016] Furthermore, the cross-section of the consumable molten pool is annular.

[0017] Furthermore, one end of the collimating mesh is connected to the consumable molten pool, and the other end is connected to the outlet at the bottom end of the nozzle body.

[0018] Furthermore, the collimating mesh holes are evenly arranged in the bottom outlet of the nozzle body.

[0019] Furthermore, the collimating mesh is connected to the middle of the bottom of the consumable molten pool.

[0020] Furthermore, the length of the consumable molten pool is smaller than the length of the collimating mesh.

[0021] Furthermore, the consumable molten pool is opened at the upper end of the top of the nozzle body.

[0022] Furthermore, the collimating mesh is located below the consumable molten pool.

[0023] Furthermore, the nozzle body is a conical structure.

[0024] In a second aspect, a 3D printer is provided, comprising a 3D printer body, on which the nozzle as described above is mounted.

[0025] The beneficial effects of the utility model are:

[0026] 1. The collimated mesh holes in the collimated grid nozzle can increase the adhesion area of ​​the liquid consumables, ensure that the liquid consumables do not drip, and the adhesion force is more evenly distributed. There will be no wire drawing during the printing process, and there will be no defects in the next printing position. At the same time, when the adhesion force is evenly distributed, the pressure of the liquid consumables sprayed from the nozzle is more uniform, and the internal structure of the printed workpiece is more uniform.

[0027] 2. Since the cross-section of the consumable molten pool is annular, heat can be better transferred and diffused inside the molten pool, thereby avoiding the concentration of heat in a specific area and achieving uniform distribution of the molten pool temperature, which helps to reduce defects such as thermal stress and cracks in the molten pool, and can also improve the smelting efficiency and product quality of the molten pool; secondly, the consumable molten pool has a large surface area, which is conducive to heat exchange and material transfer during the smelting process. On the one hand, the larger surface area can increase the heat exchange area between the molten pool and the surrounding environment, and speed up the smelting speed; on the other hand, the annular structure can promote convection and mixing of the fluid inside the molten pool, accelerate chemical reactions and material transfer during the smelting process, and thus improve the smelting efficiency.

[0028] 3. The collimated mesh can ensure that the molten material in the consumables melt pool flows out in a uniform manner, avoiding the problem of material blockage or uneven flow caused by uneven melt pool shape or flow state. The combination of the consumables melt pool and the collimated mesh enables the consumables flowing out of the melt pool to be further homogenized when passing through the mesh, ensuring that the material output from the bottom outlet of the nozzle body is uniform.

[0029] 4. Due to the uniform arrangement of the collimating mesh holes, the molten material in the consumables melt pool can flow out evenly through each mesh hole, avoiding excessive concentration of material in certain areas or insufficient material in certain areas.

[0030] 5. The connection position is selected in the middle of the bottom of the molten pool, which can ensure that the molten material in the molten pool is evenly and effectively utilized, help reduce the residence time of the material in the molten pool, and improve the smelting efficiency.

[0031] 6. Due to the short length of the consumable molten pool, the molten material in the molten pool can be absorbed and transmitted more quickly by the collimated mesh. This means that the material in the molten pool can be used more efficiently, reducing the retention time of the material in the molten pool, thereby improving the utilization efficiency of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A cross-sectional schematic diagram of a collimated grid nozzle provided by the utility model;

[0033] Figure 2 It is a schematic diagram of the cross section of a nozzle in the prior art;

[0034] Wherein: 1. nozzle body; 1-1. consumable molten pool; 1-2. alignment mesh; 2. existing nozzle. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0036] like Figure 2 As shown, during use, the existing nozzle 2 cannot improve the adhesion area and adhesion of the liquid consumables, causing the liquid consumables to drip easily, resulting in a loss of material volume and defects in the workpiece.

[0037] In order to solve the above-mentioned defects of the prior art, the inventor provides a collimated grid nozzle and a 3D printer.

[0038] like Figure 1As shown, on the first aspect, this embodiment provides a collimated grid nozzle, which includes a nozzle body 1; a consumable molten pool 1-1, which is opened at the top of the nozzle body 1 and is used to heat the consumable to a liquid state; wherein the cross-section of the consumable molten pool 1-1 is annular, and heat can be better transferred and diffused inside the molten pool, thereby avoiding the concentration of heat in a specific area, achieving a uniform distribution of the molten pool temperature, helping to reduce defects such as thermal stress and cracks in the molten pool, and also improving the smelting efficiency and product quality of the molten pool; secondly, the consumable molten pool has a large surface area, which is beneficial to heat exchange and material transfer during the smelting process. On the one hand, the large surface area can increase the heat exchange area between the molten pool and the surrounding environment, thereby accelerating the smelting speed; on the other hand, the annular structure can promote convection and mixing of the fluid inside the molten pool, accelerate chemical reactions and material transfer during the smelting process, thereby improving the smelting efficiency. The collimating mesh 1-2 is arranged inside the nozzle body 1, the collimating mesh 1-2 is connected to the consumable molten pool 1-1, a metal mesh is arranged inside the collimating mesh 1-2, and the collimating mesh 1-2 is used to improve the adhesion of the consumable.

[0039] In this embodiment, one end of the collimating mesh 1-2 is connected to the consumable molten pool 1-1, and the other end is connected to the bottom outlet of the nozzle body 1. The collimating mesh 1-2 can ensure that the molten material in the consumable molten pool 1-1 flows out in a uniform manner, avoiding material blockage or uneven flow caused by uneven shape of the molten pool or flow state. The cooperation between the consumable molten pool 1-1 and the collimating mesh 1-2 allows the consumable flowing out of the molten pool to be further homogenized when passing through the mesh, ensuring that the material output from the bottom outlet of the nozzle body 1 is uniform.

[0040] In this embodiment, the collimating meshes 1-2 are evenly arranged in the bottom outlet of the nozzle body 1, and the molten material in the consumable molten pool 1-1 can flow out evenly through each mesh, avoiding the situation where the material is excessively concentrated in some areas or insufficient in some areas.

[0041] In this embodiment, the collimating mesh 1-2 is connected to the middle of the bottom of the consumable molten pool 1-1, which can ensure that the molten material in the molten pool is evenly and effectively utilized, help reduce the residence time of the material in the molten pool, and improve the smelting efficiency.

[0042] In this embodiment, the length of the consumable molten pool 1-1 is smaller than the length of the collimating mesh 1-2, and the molten material in the molten pool can be absorbed and transmitted by the collimating mesh 1-2 more quickly, reducing the residence time of the material in the molten pool, thereby improving the utilization efficiency of the material.

[0043] In this embodiment, the nozzle body 1 is a conical structure, the consumable molten pool 1-1 is opened at the upper end of the top of the nozzle body 1, and the collimating mesh 1-2 is located below the consumable molten pool 1-1.

[0044] During the use of the nozzle, the consumable molten pool 1-1 heats the consumable to a liquid state, and the collimated mesh 1-2 divides the liquid consumable into multiple meshes to extrude the nozzle body. The mesh holes of the metal mesh in the collimated mesh 1-2 can increase the adhesion area of ​​the liquid consumable, ensuring that the liquid consumable does not drip, and the adhesion force is more evenly distributed. There will be no wire drawing during the printing process, and there will be no defects in the next printing position. At the same time, when the adhesion force is evenly distributed, the pressure of the liquid consumable sprayed from the nozzle is more uniform, and the internal structure of the printed workpiece is more uniform.

[0045] In a second aspect, a 3D printer is provided, including a 3D printer body, on which the nozzle as described above is installed.

[0046] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A collimated grid nozzle, characterized in that: include: Nozzle body (1); A consumable molten pool (1-1), which is opened on the top of the nozzle body (1) and is used to heat the consumable to a liquid state; The collimating mesh (1-2) is arranged inside the nozzle body (1), the collimating mesh (1-2) is connected to the consumable molten pool (1-1), a metal mesh is arranged inside the collimating mesh (1-2), and the collimating mesh (1-2) is used to improve the adhesion of the consumable.

2. The nozzle according to claim 1, characterized in that The cross section of the consumable molten pool (1-1) is annular.

3. The nozzle according to claim 1, characterized in that One end of the collimating mesh (1-2) is in communication with the consumable molten pool (1-1), and the other end is connected to the bottom outlet of the nozzle body (1).

4. The nozzle according to claim 3, characterized in that The collimating mesh holes (1-2) are evenly arranged in the bottom outlet of the nozzle body (1).

5. The nozzle according to claim 3, characterized in that The collimating mesh (1-2) is connected to the middle of the bottom of the consumable molten pool (1-1).

6. The nozzle according to claim 5, characterized in that The length of the consumable material molten pool (1-1) is smaller than the length of the collimating mesh (1-2).

7. The nozzle according to claim 1, characterized in that The consumable molten pool (1-1) is opened at the upper end of the top of the nozzle body (1).

8. The nozzle according to claim 1, characterized in that The collimating mesh (1-2) is located below the consumable molten pool (1-1).

9. The nozzle according to claim 1, characterized in that The nozzle body (1) is a conical structure.

10. A 3D printer, characterized in that: It comprises a 3D printer body, on which the nozzle according to any one of claims 1 to 9 is installed.

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