Dust removal device and additive manufacturing equipment

Abstract

The utility model provides a dust removal device and additive manufacturing equipment. The dust removal device sequentially comprises an air blowing module, a forming bin, an air suction module and a filtering module. A printing platform is arranged at the bottom of the forming bin, the air blowing module comprises an air blowing opening, an air blowing fan and an air blowing pipeline, the air suction module comprises an air suction opening and an air suction pipeline, and the filtering module comprises a first filter, a filtering pipeline and a second filter. And the first filter and the second filter of the filtering module are communicated through a filtering pipeline. A cross-flow fan is adopted as a blowing fan of the blowing module, a blowing opening, a blowing pipeline, an air suction opening and an air suction pipeline are all square pipelines of a long-strip-shaped structure, the cross-flow fan can generate long-strip-shaped airflow, the airflow moves along the pipelines of the long-strip-shaped structure, the air speed of the airflow in all the areas is uniform, and the air suction effect is good. The problem of turbulent flow of airflow entering the forming bin can be effectively avoided.

Description

Technical Field

[0001] This application relates to the field of selective laser melting (SLM) metal 3D printing technology, and more particularly to a dust removal device and additive manufacturing equipment having the same. Background Technology

[0002] The 3D printing industry uses laser sintering to print layer by layer. During the printing process, tiny splatter residues and dust are generated. If these residues are not treated, firstly, they will fall onto the printed surface, resulting in poor printing quality; secondly, the tiny residues will float upwards and stick to the laser protective glass, causing the protective glass to be damaged.

[0003] As described in patent CN114211009B, current dust removal devices in the industry typically use centrifugal fans as the power source. The airflow generated by the centrifugal fan is guided into the forming chamber through a process of converting a round tube into a square tube. Due to the different structures of the round and square tubes, the airflow velocity varies across different areas of the forming chamber, easily causing turbulence and affecting the dust removal effect. Although the technical solution described in patent CN114211009B adjusts the airflow direction and eliminates the lateral component of the airflow through structural design, making the airflow more uniform, the uniformity and stability of the airflow are still not ideal, and the structural design is relatively complex. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a dust removal device and additive manufacturing equipment that can uniformly blow airflow and effectively remove and collect metal residues, in order to address the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution.

[0006] This application provides a dust removal device and additive manufacturing equipment having the same. The dust removal device sequentially includes: a blowing module, a forming chamber, a suction module, and a filtering module. The bottom of the forming chamber is equipped with a printing platform. The blowing module includes: a blowing outlet, a blowing fan, and a blowing duct. The suction module includes: a suction outlet and a suction duct. The filtering module includes: a first filter, a filtering duct, and a second filter. The first filter and the second filter of the filtering module are connected through the filtering duct. The second filter is connected to the blowing duct to ensure the cleanliness of the airflow entering the blowing duct, while the first filter is used to filter out blown-away smoke, dust, and splashes.

[0007] Currently, the industry generally uses centrifugal fans connected to round pipes, and then uses variable diameter or conversion to rectangular air outlets. The process of changing the diameter or conversion requires adjusting the air speed evenly, which is difficult and structurally complex.

[0008] The blowing module of the dust removal device of this application uses a crossflow fan. In addition, the blowing port, blowing pipe and suction port and suction pipe of the dust removal device of this application all adopt a long strip-shaped square pipe. Since the crossflow fan itself can generate a long strip-shaped airflow, the airflow moves along the long strip-shaped pipe, and the air speed of the airflow in each area will be more uniform, which can effectively avoid the problem of turbulence in the airflow entering the forming chamber.

[0009] This application also provides an additive manufacturing equipment, which includes: the dust removal device described above, and further includes a powder spreading system, a lifting chamber system and an air circulation system. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A front view structural schematic diagram of the dust removal device provided in this application;

[0012] Figure 2 A top view of the dust removal device provided in this application;

[0013] Figure 3 A three-dimensional structural schematic diagram of the dust removal device provided in this application;

[0014] Figure 4 A schematic diagram of the air outlet of the dust removal device provided in this application;

[0015] Figure 5 A schematic diagram of the first structure of the first surface of the air outlet provided in this application;

[0016] Figure 6 A schematic diagram of the second structure of the first surface of the air outlet provided in this application;

[0017] Figure 7 This is a schematic diagram of the air intake of the dust removal device provided in this application.

[0018] Reference numerals: 11. Molding chamber, 12. Blowing module, 13. Suction module, 14. Filtering module, 111. Printing platform, 121. Blowing outlet, 122. Blowing fan, 123. Blowing duct, 131. Suction outlet, 132. Suction duct, 141. First filter, 142. Filtering duct, 143. Second filter, 121a. First surface, 1211. Blowing hole, 131a. First opening, 131b. Second opening. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present application and are not intended to limit the scope of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0020] like Figures 1-3 As shown, Figures 1-3 These are, respectively, a front view, a top view, and a three-dimensional view of the dust removal device provided in this application.

[0021] The dust removal device comprises, in sequence, a blowing module 12, a forming chamber 11, a suction module 13, and a filter module 14. The bottom of the forming chamber 11 is equipped with a printing platform 111. The blowing module 12 includes a blowing port 121, a blowing fan 122, and a blowing duct 123. The suction module 13 includes a suction port 131 and a suction duct 132. The filter module 14 includes a first filter 141, a filter duct 142, and a second filter 143.

[0022] The blowing module 12 of the dust removal device of this application uses a crossflow fan for its blowing fan 122. In addition, the blowing port 121, blowing pipe 123, and suction port 131 and suction pipe 132 of the dust removal device of this application all use rectangular pipes with a long strip structure (that is, rectangular air outlets can be cut out at various positions perpendicular to the airflow direction of the blowing port 121, blowing pipe 123, suction port 131, and suction pipe 132). Since the crossflow fan itself can generate a long strip airflow, the airflow moves along the long strip structure pipe, and the airflow speed in each area will be more uniform, which can effectively avoid the problem of turbulence in the airflow entering the forming chamber 11.

[0023] The first filter 141 and the second filter 143 of the filter module 14 are connected by a filter pipe 142. The second filter 143 is connected to the air blowing pipe 123 to ensure the cleanliness of the airflow entering the air blowing pipe 123, while the first filter 141 is used to filter out smoke, dust and splashes blown away.

[0024] Both the first filter 141 and the second filter 143 adopt a filter hole structure design. The filter hole size of the second filter 143 is smaller than that of the first filter 141, so that the smoke and dust blown away can only enter the first filter 141 to be removed, and cannot pass through the second filter 143. Therefore, these smoke and dust will not affect the normal additive manufacturing work.

[0025] like Figures 4-6 As shown, Figures 4-6 These are schematic diagrams of the air outlet of the dust removal device provided in this application, a first structural schematic diagram of the first surface of the air outlet, and a second structural schematic diagram of the first surface of the air outlet.

[0026] The dust removal device of this application has a first surface 121a on the side near the forming chamber 11, which is inclined from bottom to top towards the side where the forming chamber 11 is located. Several rows of air holes 1211 are formed on the first surface 121a. Through the guiding effect of the first surface 121a, the airflow entering the forming chamber 11 from the air outlet 121 flows at a certain angle from bottom to top, reducing the impact of the airflow on the working state of the metal powder normally operating on the printing platform 111.

[0027] In the specific design, the tilt angle of the aforementioned airflow is 3°-10°.

[0028] like Figures 5-6 As shown, the first surface 121a of the dust removal device's air outlet 121 is provided with several rows of air holes 1211. Usually, the air holes 1211 in the upper row are arranged more densely than those in the lower row, or the individual air holes 1211 in the upper row are larger than those in the lower row. As a result, the airflow intensity entering the forming chamber 11 through the air holes 1211 in the upper row will be greater than that in the lower row.

[0029] In actual operation, smoke and dust, as well as splashed residue, usually tend to splash or float upwards away from the printing platform 111. The above design can better remove splashed residue and smoke, while also preventing the blowaway of metal powder that is working normally.

[0030] like Figure 7 As shown, Figure 7 This is a schematic diagram of the suction port of the dust removal device provided in this application. The suction port 131 is a long strip design resembling a trumpet. Specifically, the opening size of the first opening 131a on the side closer to the forming chamber 11 is larger than the opening size of the second opening 131b on the side farther from the forming chamber 11. The first opening 131a expands upward to more effectively suck away the airflow blown from the air outlet 121, along with the corresponding splashed residue and dust. The first opening 131a expands downward to allow the suction port 131 to match the airflow blown from the suction port 121, preventing the blowing away of metal powder during normal operation.

[0031] In a preferred embodiment, the suction port 131 is positioned slightly higher in the vertical direction than the blowing port 121, so that the long, flared suction port 131 can better receive the upward-flowing airflow from the blowing port 121, preventing the metal powder being blown away during normal operation.

[0032] In an optional embodiment, a collection bucket (not shown in the figure) is provided below the first filter 141 to collect splashed residue and soot.

[0033] This application also provides an additive manufacturing apparatus, which includes: the dust removal device described above, and further includes a powder spreading system (not shown in the figure), a lifting chamber system (not shown in the figure), and an air circulation system (not shown in the figure).

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0035] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made to this application, as well as combinations of the various embodiments in this application, without departing from the principles of this application. These improvements, modifications, and combinations also fall within the protection scope of the claims of this application.

Claims

1. A dust removal device, characterized in that... The components include, in sequence: a blowing module (12), a forming chamber (11), a suction module (13), and a filter module (14). The bottom of the molding chamber (11) is provided with a printing platform (111), and the blowing module (12) includes: a blowing port (121), a blowing fan (122), and a blowing duct (123). The suction module (13) includes: suction port (131) and suction duct (132); The filter module (14) includes: a first filter (141), a filter pipe (142), and a second filter (143), wherein the first filter (141) and the second filter (143) are connected through the filter pipe (142); The blower (122) of the blower module (12) adopts a crossflow blower; The air outlet (121), air duct (123), air inlet (131), and air duct (132) are all rectangular pipes with a long strip structure.

2. The dust removal device according to claim 1, characterized in that... The air outlet (121) has a first surface (121a) on the side near the molding chamber (11). Several rows of air holes (1211) are opened on the first surface (121a), and the first surface (121a) has a structure that gradually slopes from bottom to top toward the side where the molding chamber (11) is located.

3. The dust removal device according to claim 2, characterized in that... Through the guiding effect of the first surface (121a), the airflow entering the molding chamber (11) from the air outlet (121) will flow obliquely from bottom to top at a certain angle, and the oblique angle of the airflow is 3°-10°.

4. The dust removal device according to claim 3, characterized in that... The air holes (1211) in the upper row are arranged more densely than those in the lower row, or the individual air holes (1211) in the upper row are larger than those in the lower row.

5. The dust removal device according to claim 4, characterized in that... The air intake (131) is a long strip design similar to a horn mouth. The opening size of the first opening (131a) on the side closer to the molding chamber (11) is larger than the opening size of the second opening (131b) on the side farther away from the molding chamber (11).

6. The dust removal device according to claim 5, characterized in that... The air intake (131) is positioned slightly higher in the vertical direction than the air outlet (121).

7. The dust removal device according to claim 1, characterized in that... Both the first filter (141) and the second filter (143) adopt a filter hole structure design, and the filter hole size of the second filter (143) is smaller than that of the first filter (141).

8. The dust removal device as described in claim 1, characterized in that, A collection bucket is provided below the first filter (141).

9. An additive manufacturing apparatus, characterized in that, include: The dust removal device according to any one of claims 1-8 further includes a dust spreading system, a lifting chamber system, and an air circulation system.

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