Metal 3D printer dust removal device

Abstract

The utility model relates to dust removal device technical field, and its in order to solve the dust removal device of existing metal 3D printer, will lead to the internal partial vortex or turbulent airflow phenomenon of printing box body, not only influence the effective extraction of smoke dust, but also exist the problem of the abrasion of metal powder to the box body, the utility model provides a metal 3D printer dust removal device, including air deflector assembly, air deflector assembly is along the inside in the box body, air deflector assembly is along the linear direction and is horizontally arranged between the air inlet pipe and the air outlet pipe, the utility model discloses a linear airflow path is formed between the air inlet pipe and the air outlet pipe by setting air deflector assembly to regularize airflow, reduce turbulent flow, make smoke dust more concentratedly along air deflector assembly channel fast flow to the air outlet pipe, can also avoid the abrasion to the inside of box body, and the cleaning work of box body is convenient subsequently.

Description

Technical Field

[0001] This utility model relates to the field of dust removal device technology, and more specifically, to a dust removal device for a metal 3D printer. Background Technology

[0002] Metal 3D printers primarily utilize laser melting technology to melt metal powder and form functional solid parts. Specifically, a 3D printing powder feeding system lays the powder material flat on a substrate. In an inert gas atmosphere (to prevent the metal powder from oxidizing or burning), an energy source moves along the X and Y axes to sinter the powder material, layer by layer, to obtain the solid part. During this process, a large number of tiny metal particles, harmful gases, and chemical vapors are generated. These substances mix together to form dust, so further dust removal equipment is needed to treat the dust.

[0003] In existing technologies, ventilation mechanisms are typically used to expel fumes and dust. For example, the dust removal structure for a metal 3D printer disclosed in patent CN220480252U removes dust by setting a ventilation chamber at the bottom of the chamber and then ventilating it to blow out residual heat and fumes. However, while direct ventilation and blowing can blow dust-laden gas out of the chamber, the presence of grinding and material laying structures can cause localized eddies or turbulent airflow. This not only affects the effective extraction of fumes and dust but also causes wear and tear on the chamber caused by metal powder. Furthermore, it leads to the loss of a large amount of inert gas along with the fumes and dust, requiring frequent replenishment of fresh gas and increasing raw material costs.

[0004] Based on the above description, there is an urgent need for a dust removal device for metal 3D printers that can efficiently remove dust and recover inert gases. Utility Model Content

[0005] The purpose of this utility model is to provide a dust removal device for a metal 3D printer, which aims to solve the technical problem that the existing direct ventilation and blowing methods, although able to blow dust-laden gas out of the chamber, will cause local vortex or turbulent airflow phenomena inside the printing chamber due to the presence of structures such as grinding and material laying. This not only affects the effective extraction of smoke and dust, but also causes wear and tear on the chamber caused by metal powder.

[0006] The embodiments of this utility model are achieved through the following technical solutions: A dust removal device for a metal 3D printer includes a printing chamber, an air inlet pipe, and an air outlet pipe; the air inlet pipe and the air outlet pipe are connected to each other in the chamber; it also includes an air guide assembly; the air guide assembly is disposed inside the chamber; the air guide assembly is horizontally disposed between the air inlet pipe and the air outlet pipe in a straight line direction.

[0007] Preferably, the air guiding assembly includes multiple air guiding rods and a pair of mounting ring plates; the multiple air guiding rods are spaced apart between the pair of mounting ring plates; the pair of mounting ring plates are opposite to the inner sidewall of the housing; the air inlet pipe and the air outlet pipe are both connected to the hollow portion of the pair of mounting ring plates.

[0008] Preferably, the cross-section of the air guide rod is circular.

[0009] Preferably, the cross-section of the air guide rod is an isosceles triangle or an isosceles trapezoid.

[0010] Preferably, the air outlet duct is connected to a purification component.

[0011] Preferably, the exhaust end of the purification component is connected to the air inlet pipe via a circulation pipe.

[0012] Preferably, the circulation pipe includes a filter section and a pair of air supply sections; the filter section is disposed between the pair of air supply sections; the pair of air supply sections are respectively connected to the purification component and the air inlet pipe.

[0013] Preferably, the filter pipe section is provided with a filter assembly; a positioning cylinder is provided between the filter pipe section and the air supply pipe section; one end of the positioning cylinder is connected to the filter pipe section and the air supply pipe section; the other end of the positioning cylinder is embedded in the filter pipe section and abuts against the side end of the filter assembly.

[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: This utility model uses an air inlet pipe and an air outlet pipe arranged opposite each other and connected to the printing area of ​​the housing, which facilitates the efficient extraction of smoke and dust by the exhaust fan. In particular, by setting an air guide component between the air inlet pipe and the air outlet pipe to form a straight airflow path, the airflow is regulated, turbulence is reduced, and the smoke and dust are more concentrated and flow quickly along the air guide component channel to the air outlet pipe. It can also avoid wear and tear on the inside of the housing and facilitate subsequent cleaning of the housing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the air guide component structure of this utility model; Figure 3 for Figure 2 The first top view; Figure 4 for Figure 2 The second top view; Figure 5 This is a schematic diagram of the filter assembly structure of this utility model.

[0016] Icons: 1-Box body, 2-Inlet duct, 3-Outlet duct, 4-Air guide assembly, 41-Air guide rod, 42-Mounting ring plate, 5-Purification assembly, 6-Circulation pipe, 61-Filter section, 62-Air supply section, 7-Filter assembly, 8-Positioning cylinder. Detailed Implementation

[0017] The specific implementation method is described below with reference to the accompanying drawings.

[0018] Example 1 Please see Figures 1 to 5 The present invention provides the following technical solution: a dust removal device for a metal 3D printer, which is suitable for extracting and treating the dust from the existing metal 3D printing box.

[0019] Specifically, such as Figure 1 and Figure 2 As shown, a dust removal device for a metal 3D printer includes a housing 1, an air inlet pipe 2, and an air outlet pipe 3; the air inlet pipe 2 and the air outlet pipe 3 are connected to each other in the housing 1; it also includes an air guide assembly 4; the air guide assembly 4 is disposed inside the housing 1; the air guide assembly 4 is horizontally disposed between the air inlet pipe 2 and the air outlet pipe 3 in a straight line direction.

[0020] In this embodiment, the air inlet pipe 2 and the air outlet pipe 3 are arranged opposite to each other and are connected to the printing area of ​​the housing 1, so as to facilitate the efficient extraction of smoke and dust by the exhaust fan. In this embodiment, by setting the air guide component 4 between the air inlet pipe 2 and the air outlet pipe 3, a straight airflow path is formed to regulate the airflow, reduce turbulence, and make the smoke and dust flow more concentratedly and quickly to the air outlet pipe 3 along the channel of the air guide component 4. This also avoids wear on the inside of the housing 1 and facilitates the subsequent cleaning of the housing 1.

[0021] In this embodiment, ventilation openings are provided on both sides of the box 1 near the printing area, and the air inlet pipe 2 and the air outlet pipe 3 are connected to the ventilation openings.

[0022] Specifically, such as Figures 2 to 4 As shown, the air guide assembly 4 includes multiple air guide rods 41 and a pair of mounting ring plates 42; the multiple air guide rods 41 are spaced apart between the pair of mounting ring plates 42; the pair of mounting ring plates 42 are opposite to the inner side wall of the housing 1; the air inlet pipe 2 and the air outlet pipe 3 are both connected to the hollow part of the pair of mounting ring plates 42.

[0023] In this embodiment, the mounting ring plate 42 is installed on the inner side wall of the housing 1 by screwing or welding; multiple air guide rods 41 are connected between a pair of mounting ring plates 42 by snap-fitting or welding.

[0024] In this embodiment, the cross-section of the guide rod 41 is circular, i.e., a circular guide rod. When the airflow enters from the air inlet pipe 2 and flows through the circular guide rod, the curved structure allows the airflow to smoothly transition along the surface of the rod, avoiding local eddies caused by sharp corners, and thus preventing dust from accumulating locally due to eddies. It can also regulate the airflow introduced by the air inlet pipe 2 into a stable laminar flow, flowing in a straight line towards the air outlet pipe, ensuring that dust is uniformly entrained and achieving a highly efficient dust removal effect.

[0025] In this embodiment, the cross-section of the air guide rod 41 can also be an isosceles triangle or an isosceles trapezoid. When the airflow flows in from the air inlet pipe 2, it will converge along the inclined side of the triangle / trapezoidal shape towards the bottom, forming a "contractive airflow". This creates a local acceleration zone inside the air guide assembly 4, further increasing the flow velocity compared to the circular air guide rod. This allows the airflow to concentrate and rush towards the printing area, accurately capturing the high-concentration smoke and dust that rises due to heat. In other words, the convergence effect compensates for the airflow dispersion problem that may be caused by distributed air intake.

[0026] Specifically, such as Figure 1 As shown, the air outlet duct 3 is connected to the purification component 5.

[0027] In this embodiment, to facilitate the recycling of inert gas, the extracted flue gas needs to be purified. Since the metal flue gas contains high-temperature metal particles, volatile organic compounds (VOCs), toxic gases, etc., the purification component 5 includes a high-pressure sealed ceramic membrane filter and a purification tower. The high-pressure sealed ceramic membrane filter is a commonly used metal powder separation device in the field. After being extracted from the exhaust pipe 3, the flue gas first enters the high-pressure sealed ceramic membrane filter for the separation of solid impurities and cooling buffering. Then, it is further drawn into the purification tower, where the organic VOCs and toxic gases are purified through the adsorption layer in the purification tower.

[0028] In this embodiment, the adsorption layer can use commonly used adsorption fillers in the prior art, such as metal Pall rings and activated carbon, and the specific selection can be made flexibly according to the concentration of VOCs and the type of toxic gas.

[0029] Specifically, such as Figure 1 and Figure 5 As shown, the exhaust end of the purification component 5 is connected to the air inlet pipe 2 via the circulation pipe 6. The circulation pipe 6 includes a filter pipe section 61 and a pair of air supply pipe sections 62; the filter pipe section 61 is located between the pair of air supply pipe sections 62; the pair of air supply pipe sections 62 are respectively connected to the purification component 5 and the air inlet pipe 2. A filter component 7 is installed inside the filter pipe section 61; a positioning cylinder 8 is provided between the filter pipe section 61 and the air supply pipe section 62; one end of the positioning cylinder 8 is connected to the filter pipe section 61 and the air supply pipe section 62; the other end of the positioning cylinder 8 is embedded in the filter pipe section 61 and abuts against the side end of the filter component 7.

[0030] In this embodiment, the purification component 5 first removes most of the metal particles and harmful gases from the smoke and dust, thereby achieving overall purification of the inert gas. Then, the purified inert gas is further introduced into the circulation pipe 6, where the composite filter element of the filter component 6 performs terminal fine filtration and drying to ensure the cleanliness and dryness of the inert gas returning to the housing 1, thus avoiding contamination of the printing layer and affecting the printing effect.

Claims

1. A dust removal device for a metal 3D printer, comprising a housing (1), an air inlet pipe (2), and an air outlet pipe (3); wherein the air inlet pipe (2) and the air outlet pipe (3) are connected to the housing (1), characterized in that: It also includes an air guide assembly (4); the air guide assembly (4) is disposed inside the housing (1); the air guide assembly (4) is horizontally disposed between the air inlet pipe (2) and the air outlet pipe (3) in a straight line direction.

2. The dust removal device for a metal 3D printer according to claim 1, characterized in that: The air guide assembly (4) includes multiple air guide rods (41) and a pair of mounting ring plates (42); the multiple air guide rods (41) are spaced apart between the pair of mounting ring plates (42); the pair of mounting ring plates (42) are opposite to the inner sidewall of the housing (1); the air inlet pipe (2) and the air outlet pipe (3) are both connected to the hollow part of the pair of mounting ring plates (42).

3. The dust removal device for a metal 3D printer according to claim 2, characterized in that: The cross-section of the air guide rod (41) is circular.

4. The dust removal device for a metal 3D printer according to claim 2, characterized in that: The cross-section of the air guide rod (41) is an isosceles triangle or an isosceles trapezoid.

5. The dust removal device for a metal 3D printer according to any one of claims 1 to 4, characterized in that: The air outlet duct (3) is connected to the purification component (5).

6. The dust removal device for a metal 3D printer according to claim 5, characterized in that: The exhaust end of the purification component (5) is connected to the air inlet pipe (2) through the circulation pipe (6).

7. The dust removal device for a metal 3D printer according to claim 6, characterized in that: The circulation pipe (6) includes a filter pipe section (61) and a pair of air supply pipe sections (62); the filter pipe section (61) is located between the pair of air supply pipe sections (62); the pair of air supply pipe sections (62) are respectively connected to the purification component (5) and the air inlet pipe (2).

8. The dust removal device for a metal 3D printer according to claim 7, characterized in that: The filter pipe section (61) is provided with a filter assembly (7); a positioning cylinder (8) is provided between the filter pipe section (61) and the air supply pipe section (62); one end of the positioning cylinder (8) is connected to the filter pipe section (61) and the air supply pipe section (62); the other end of the positioning cylinder (8) is embedded in the filter pipe section (61) and abuts against the side end of the filter assembly (7).

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