Material conveying and spraying device for 3D printing

Abstract

The utility model discloses a material conveying and spraying device for 3D printing, and belongs to the technical field of material conveying for 3D printing, the material conveying and spraying device for 3D printing comprises a discharging bin and a feeding port formed in the side wall of the discharging bin, the bottom of the discharging bin is fixedly connected with a connector, the connector is detachably connected with a nozzle, and the nozzle is fixedly connected with the discharging bin. A first baffle and a second baffle which are of an annular structure are sequentially and fixedly connected to the axial position of the inner side of the nozzle from top to bottom, a hard spring is installed on the upper surface of the second baffle, and the top end of the hard spring is connected with a sealing ball abutting against a through hole in the first baffle. Guide rods are symmetrically installed on the outer wall of the sealing ball, guide grooves in sliding connection with the ends of the guide rods are formed in the inner wall of the nozzle, a sealing cover is installed on the top of the discharging bin, an air inlet pipe is installed on the sealing cover, it is guaranteed that the pressure of material spraying is consistent front and back, and then the printing effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of material feeding technology for 3D printing, and more specifically, to a material feeding and jetting device for 3D printing. Background Technology

[0002] 3D printing is a technology that constructs objects by printing layer by layer based on digital model files. It uses powdered metals or plastics and other bondable materials to create solid parts by adding materials one layer at a time. 3D printing is also known as additive manufacturing because it builds objects by adding materials layer by layer.

[0003] Patent publication number CN220517555U discloses a 3D printing material feeding and jetting device, including a feeding cylinder. An auger for feeding material is rotatably connected to the inner wall of the feeding cylinder. A heating chamber is fixedly connected to the end of the feeding cylinder. A heating ring for heating the 3D printing material is fixedly installed on the inner wall of the heating chamber. A resistance wire structure is provided on the inner wall of the heating ring. The output end of the heating chamber is plugged into and connected to a discharge chamber. A nozzle is fixedly installed at the bottom of the discharge chamber. The feeding cylinder is used to feed 3D printing material to the 3D printer. This invention relates to the field of 3D printing devices. By setting the feeding cylinder, heating chamber, and discharge chamber as separate structures, it facilitates quick disassembly of the feeding cylinder, heating chamber, and discharge chamber when blockages occur inside, thus facilitating the cleaning and unblocking of residual 3D printing material and the unblocking and maintenance of the feeding structure.

[0004] However, the patent publication number CN220517555U uses a cylinder to drive the pusher plate to move up and down on the inner wall of the feeding bin, so as to facilitate the ejection of 3D printing material through the nozzle at the bottom of the feeding bin for 3D printing. However, when the cylinder is working in the initial state, its moving end moves slowly, which leads to unstable pressure in the early stage of transmission. This results in inconsistent material ejection pressure before and after, which affects the printing effect. Therefore, we propose a material conveying and ejection device for 3D printing to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a material feeding and jetting device for 3D printing, which ensures that the pressure of material jetting is consistent before and after, thereby ensuring the printing effect.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A material feeding and jetting device for 3D printing includes a material feeding bin and a material inlet opened on the side wall of the material feeding bin, and a connector is fixedly connected to the bottom of the material feeding bin;

[0010] A nozzle is detachably connected to the connector. A first baffle and a second baffle with an annular structure are fixedly connected to the inner axial position of the nozzle from top to bottom. A rigid spring is installed on the upper surface of the second baffle. A sealing ball that abuts against a through hole on the first baffle is connected to the top of the rigid spring. Guide rods are symmetrically installed on the outer wall of the sealing ball. A guide groove is opened on the inner wall of the nozzle that slides and connects with the end of the guide rod.

[0011] The top of the feeding hopper is equipped with a sealing cover, and an air inlet pipe is installed on the sealing cover;

[0012] A high-pressure air pump is installed on the side wall of the feeding hopper away from the feed inlet, and the air outlet of the high-pressure air pump is connected to the air inlet pipe.

[0013] Furthermore, a dustproof mesh cover is installed at the air inlet of the high-pressure air pump, and the dustproof mesh cover is made of stainless steel.

[0014] Furthermore, the outer wall of the connector is provided with an external thread, and the inner wall of the nozzle is provided with an internal thread that is screwed into the external thread.

[0015] Furthermore, a boss integrally formed with the connector is provided above the external thread, and a sealing ring that fits against the inner wall of the nozzle top opening is embedded on the outer wall of the boss.

[0016] Furthermore, the outer diameter of the sealing ball is larger than the inner diameter of the first baffle.

[0017] Furthermore, the outer diameter of the rigid spring is larger than the inner diameter of the second baffle.

[0018] Furthermore, a two-way connector is installed between the outlet end of the high-pressure air pump and the inlet pipe.

[0019] 3. Beneficial Effects

[0020] Compared with existing technologies, the advantages of this utility model are:

[0021] (1) In this scheme, the melted material enters the feeding hopper through the feed port, the high-pressure air pump is turned on, and the gas is filled into the feeding hopper through the air inlet pipe, so that the air pressure in the feeding hopper gradually increases. When the air pressure reaches a certain value, the hard spring located between the first baffle and the second baffle is compressed, and at the same time, the guide rod slides with the guide groove, thereby causing the sealing ball to move, so that the material in the feeding hopper is sprayed out through the nozzle under constant pressure, ensuring that the pressure of the material spraying is consistent before and after, thereby ensuring the printing effect.

[0022] (2) In this scheme, when the high-pressure air pump is working, the dustproof net can be used to intercept the dust in the air, thereby preventing impurities from being sucked into the feeding hopper and preventing the material from being contaminated. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the connector structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the nozzle structure of this utility model;

[0026] Figure 4 This is a front view schematic diagram of the nozzle of this utility model;

[0027] Figure 5 This is a cross-sectional view of the nozzle AA portion of this utility model;

[0028] Figure 6 This is a schematic diagram of the high-pressure air pump structure of this utility model.

[0029] Explanation of the labels in the diagram:

[0030] 1. Feed hopper; 2. Feed inlet; 3. Connector; 4. External thread; 5. Sealing ring; 6. Nozzle; 7. Internal thread; 8. First baffle; 9. Second baffle; 10. Hard spring; 11. Sealing ball; 12. Guide rod; 13. Guide groove; 14. Sealing cover; 15. Air inlet pipe; 16. High-pressure air pump; 17. Dustproof mesh cover. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Please see Figure 1-6 A material feeding and jetting device for 3D printing includes a material feeding bin 1 and a material inlet 2 opened on the side wall of the material feeding bin 1. A connector 3 is fixedly connected to the bottom of the material feeding bin 1.

[0034] A nozzle 6 is detachably connected to the connector 3. A first baffle 8 and a second baffle 9 with an annular structure are fixedly connected to the inner axial position of the nozzle 6 from top to bottom. A rigid spring 10 is installed on the upper surface of the second baffle 9. A sealing ball 11 that abuts against the through hole on the first baffle 8 is connected to the top of the rigid spring 10. Guide rods 12 are symmetrically installed on the outer wall of the sealing ball 11. A guide groove 13 that slides and connects with the end of the guide rod 12 is opened on the inner wall of the nozzle 6.

[0035] A sealing cover 14 is installed on the top of the feeding hopper 1, and an air inlet pipe 15 is installed on the sealing cover 14;

[0036] A high-pressure air pump 16 is installed on the side wall of the feeding hopper 1 away from the feed inlet 2, and the air outlet of the high-pressure air pump 16 is connected to the air inlet pipe 15.

[0037] It should be noted that when using this 3D printing material feeding and jetting device, the molten material enters the unloading bin 1 through the feed inlet 2 (the connection between the feed inlet 2 and the feeding conveying mechanism is closed). The high-pressure air pump 16 is turned on, and gas is injected into the unloading bin 1 through the air inlet pipe 15, so that the air pressure in the unloading bin 1 gradually increases. When the air pressure reaches a certain value, the rigid spring 10 located between the first baffle 8 and the second baffle 9 is compressed, and at the same time, the guide rod 12 slides in conjunction with the guide groove 13, thereby causing the sealing ball 11 to move. This allows the material in the unloading bin 1 to be ejected through the nozzle 6 under a constant pressure, ensuring that the material ejection pressure is consistent before and after, thus ensuring the printing effect. After the high-pressure air pump 16 stops working, the rigid spring 10 returns to its original position, causing the sealing ball 11 to seal the first baffle 8.

[0038] like Figure 6 As shown, a dustproof mesh cover 17 is installed at the air inlet port of the high-pressure air pump 16, and the dustproof mesh cover 17 is made of stainless steel.

[0039] It should be noted that when the high-pressure air pump 16 is working, the dustproof net cover 17 can trap dust in the intake air, thereby preventing impurities from being sucked into the feeding hopper 1 and preventing the material from being contaminated.

[0040] like Figure 2 , Figure 3As shown, the outer wall of the connector 3 is provided with an external thread 4, and the inner wall of the nozzle 6 is provided with an internal thread 7 that is screwed into the external thread 4. Above the external thread 4, there is a boss integrally formed with the connector 3, and the outer wall of the boss is inlaid with a sealing ring 5 that fits against the inner wall of the nozzle 6 top opening.

[0041] It should be noted that the nozzle 6 is installed on the connector 3 by screwing the internal thread 7 into the external thread 4, and the sealing ring 5 is used to fill the gap between the nozzle 6 and the connector 3 to facilitate the disassembly and assembly of the nozzle 6.

[0042] like Figure 5 As shown, the outer diameter of the sealing ball 11 is larger than the inner diameter of the first baffle 8, and the outer diameter of the rigid spring 10 is larger than the inner diameter of the second baffle 9.

[0043] It should be noted that the rigid spring 10 is supported by the second baffle 9. When the air pressure reaches a certain value, the rigid spring 10 located between the first baffle 8 and the second baffle 9 is compressed. At the same time, the guide rod 12 slides in conjunction with the guide groove 13, thereby causing the sealing ball 11 to move, and thus causing the material in the feeding bin 1 to be ejected through the nozzle 6 under constant pressure.

[0044] A two-way connector is installed between the outlet end of the high-pressure air pump 16 and the inlet pipe 15.

[0045] In use: The melted material enters the discharge bin 1 through the feed inlet 2. The high-pressure air pump 16 is turned on, and gas is injected into the discharge bin 1 through the air inlet pipe 15, so that the air pressure in the discharge bin 1 gradually increases. When the air pressure reaches a certain value, the hard spring 10 located between the first baffle 8 and the second baffle 9 is compressed. At the same time, the guide rod 12 slides in conjunction with the guide groove 13, thereby causing the sealing ball 11 to move, and then the material in the discharge bin 1 is ejected through the nozzle 6 under constant pressure.

[0046] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A material feeding and jetting device for 3D printing, comprising a material hopper (1) and a material inlet (2) formed in a side wall of the material hopper (1), characterized in that: The bottom of the blanking bin (1) is fixedly connected with a connecting head (3); The connecting head (3) is detachably connected with a nozzle (6), the inner side of the nozzle (6) is sequentially fixedly connected from top to bottom with a first baffle (8) and a second baffle (9) arranged in a ring structure, the upper surface of the second baffle (9) is mounted with a hard spring (10), the top end of the hard spring (10) is connected with a sealing ball (11) abutting against a through hole on the first baffle (8), the outer wall of the sealing ball (11) is symmetrically mounted with a guide rod (12), the inner wall of the nozzle (6) is provided with a guide groove (13) slidably connected with the end of the guide rod (12); The top of the blanking bin (1) is mounted with a sealing cover (14), and the sealing cover (14) is mounted with an air inlet pipe (15); The side wall of the blanking bin (1) away from the feeding port (2) is mounted with a high-pressure air pump (16), and the air outlet end of the high-pressure air pump (16) is in conductive connection with the air inlet pipe (15).

2. The material delivery jet device for 3D printing of claim 1, wherein: The port part of the air inlet end of the high-pressure air pump (16) is mounted with a dustproof mesh cover (17), and the dustproof mesh cover (17) is made of stainless steel.

3. The material delivery jet device for 3D printing of claim 1, wherein: The outer wall of the connecting head (3) is provided with an external thread (4), and the inner wall of the nozzle (6) is provided with an internal thread (7) screwing with the external thread (4).

4. The material delivery jet device for 3D printing of claim 3, wherein: The upper part of the external thread (4) is provided with a boss integrally formed with the connecting head (3), and the outer wall of the boss is inlaid with a sealing rubber ring (5) abutting against the inner wall of the top opening of the nozzle (6).

5. The material delivery jet device for 3D printing of claim 1, wherein: The outer diameter of the sealing ball (11) is greater than the inner diameter of the first baffle (8).

6. The material delivery jet device for 3D printing of claim 1, wherein: The outer diameter of the hard spring (10) is greater than the inner diameter of the second baffle (9).

7. The material delivery jet device for 3D printing of claim 1, wherein: A two-way connector is mounted between the air outlet end of the high-pressure air pump (16) and the air inlet pipe (15).

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