Dust removal device and additive manufacturing equipment

Abstract

The invention 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 technical field of selective laser melting (SLM) metal 3D printing technology, and particularly to a dust removal device and an additive manufacturing device having the same. Background Art

[0002] The 3D printing industry conducts layer-by-layer printing through laser sintering. During the printing process, fine splashing residues and soot are generated. If these residues are not processed, first, the residues will fall on the printing surface, resulting in a poor printing effect; second, the fine residues will float upward and stick to the laser protection glass, causing the protection glass to be damaged.

[0003] As described in patent CN114211009B, currently, the dust removal devices in the industry usually use a centrifugal fan as the power source of the wind force, and introduce the airflow generated by the centrifugal fan into the forming chamber through the method of converting a round pipe to a square pipe. Due to the different structures of the round pipe and the square pipe, the wind speeds of the airflow entering the forming chamber in each area of the forming chamber are inconsistent, and turbulent flow is likely to occur, thereby affecting the dust removal effect. Although the technical solution described in patent CN114211009B adjusts the airflow direction through structural design and eliminates the left and right direction components of the airflow, making the airflow relatively uniform. However, the uniformity and stability of the airflow in this solution 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 an additive manufacturing device that can uniformly blow the airflow, effectively remove and collect metal residues, aiming at the deficiencies of the prior art.

[0005] To solve the above technical problems, this application adopts the following technical solutions.

[0006] This application provides a dust removal device and an additive manufacturing device having the same. The dust removal device sequentially includes: a blowing module, a forming chamber, a suction module, and a filtering module. A printing platform is provided at the bottom of the forming chamber. The blowing module includes: a blowing port, a blowing fan, and a blowing pipeline. The suction module includes: a suction port and a suction pipeline. The filtering module includes: a first filter, a filtering pipeline, and a second filter. The first filter and the second filter of the filtering module are connected through the filtering pipeline. The second filter is connected to the blowing pipeline to ensure the cleanliness of the airflow entering the blowing pipeline, and the first filter is used to filter the blown soot and splashes.

[0007] Currently, in the industry, a centrifugal fan is generally connected to a round pipe, and then a variable diameter or a rectangular air outlet is used for connection or conversion. It is difficult to adjust the wind speed evenly during the variable diameter or conversion process, and the structure is complex.

[0008] The blowing fan of the blowing module of the dust removal device of the present application uses a cross-flow fan. In addition, the air blowing port, the blowing pipeline, the air suction port, and the air suction pipeline of the dust removal device of the present application all adopt square pipelines with a long strip structure. Since the cross-flow fan itself can generate a long strip of air flow, and the air flow moves along the pipeline with a long strip structure, the wind speed of the air flow in each area will be relatively uniform, which can effectively avoid the problem of turbulent flow of the air flow entering the forming chamber.

[0009] The present application also provides an additive manufacturing device, which includes: the above-mentioned dust removal device, and also includes a powder spreading system, a lifting bin system, and an air circuit circulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 It is a front view structural schematic diagram of the dust removal device provided by the present application;

[0012] Figure 2 It is a top view structural schematic diagram of the dust removal device provided by the present application;

[0013] Figure 3 It is a three-dimensional structural schematic diagram of the dust removal device provided by the present application;

[0014] Figure 4 It is a structural schematic diagram of the air blowing port of the dust removal device provided by the present application;

[0015] Figure 5 It is a first structural schematic diagram of the first surface of the air blowing port provided by the present application;

[0016] Figure 6 It is a second structural schematic diagram of the first surface of the air blowing port provided by the present application;

[0017] Figure 7 It is a structural schematic diagram of the air suction port of the dust removal device provided by the present application.

[0018] Reference numerals: 11, forming chamber; 12, blowing module; 13, air suction module; 14, filtering module; 111, printing platform; 121, air blowing port; 122, blowing fan; 123, blowing pipeline; 131, air suction port; 132, air suction pipeline; 141, first filter; 142, filtering pipeline; 143, second filter; 121a, first surface; 1211, blowing hole; 131a, first opening; 131b, second opening. Detailed implementation manners

[0019] To enable those skilled in the art to better understand the solution of this application, the following further details this application in conjunction with the accompanying drawings and specific implementation manners. Obviously, the described embodiments are only a part of the embodiments of this application, rather than a limitation on the scope of rights of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope protected by this application.

[0020] As Figures 1-3 shown Figures 1-3 are respectively the front view structural schematic diagram, top view structural schematic diagram, and three-dimensional structural schematic diagram of the dust removal device provided by this application.

[0021] The dust removal device sequentially includes: a blowing module 12, a forming chamber 11, a suction module 13, and a filtering module 14. A printing platform 111 is provided at the bottom of the forming chamber 11. The blowing module 12 includes: a blowing port 121, a blowing fan 122, and a blowing pipeline 123. The suction module 13 includes: a suction port 131 and a suction pipeline 132. The filtering module 14 includes: a first filter 141, a filtering pipeline 142, and a second filter 143.

[0022] The blowing fan 122 of the blowing module 12 of the dust removal device of this application uses a cross-flow fan. In addition, the blowing port 121, the blowing pipeline 123, the suction port 131, and the suction pipeline 132 of the dust removal device of this application all use square pipelines with a long-strip structure (that is, rectangular air outlets can be intercepted at each position perpendicular to the air flow direction of the blowing port 121, the blowing pipeline 123, the suction port 131, and the suction pipeline 132). Since the cross-flow fan itself can generate long-strip air flow, and the air flow moves along the pipeline with a long-strip structure, the air flow speed in each area will be relatively uniform, which can effectively avoid the problem of air flow turbulence entering the forming chamber 11.

[0023] The first filter 141 and the second filter 143 of the filtering module 14 are conducted through the filtering pipeline 142. The second filter 143 is connected to the blowing pipeline 123 to ensure the cleanliness of the air flow entering the blowing pipeline 123. The first filter 141 is used to filter the blown dust and spatter.

[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 filtered blown dust and spatter can only enter the first filter 141 to be removed and cannot pass through the second filter 143. Furthermore, these dust and spatter will not affect the normal additive manufacturing work.

[0025] As shown Figures 4-6 in Figures 4-6 Figure 1, Figure 2, and Figure 3 are respectively the schematic structural diagrams of the air blowing port of the dust removal device provided by the present application, the first surface of the air blowing port, and the second surface of the air blowing port.

[0026] On one side of the air blowing port 121 of the dust removal device of the present application close to the forming chamber 11, there is a first surface 121a, which is a structure that gradually inclines towards the side where the forming chamber 11 is located from bottom to top. At the same time, several rows of air blowing holes 1211 are provided on the first surface 121a. Through the guiding effect of the first surface 121a, the airflow entering the forming chamber 11 from the air blowing port 121 will flow obliquely from bottom to top along a certain angle, reducing the influence of the airflow on the working state of the metal powder on the printing platform 111.

[0027] In a specific solution, the inclination angle of the above airflow is 3° - 10°.

[0028] As shown Figures 5-6 in Figure 4, several rows of air blowing holes 1211 are provided on the first surface 121a of the air blowing port 121 of the dust removal device. Usually, the air blowing holes 1211 in the upper row are arranged more densely than those in the lower row, or the size of a single air blowing hole 1211 in the upper row is larger than that in the lower row. Furthermore, the airflow intensity entering the forming chamber 11 through the air blowing holes 1211 in the upper row will be greater than that in the lower row.

[0029] Usually, during actual operation, dust and splashed residues generally splash or float upward away from the printing platform 111. The above design method can better carry away the splashed residues and dust, and at the same time, it will not blow away the normally working metal powder.

[0030] As shown Figure 7 in Figure 7 Figure 5 is the schematic structural diagram of the air suction port of the dust removal device provided by the present application. The air suction port 131 is designed as a long strip shape similar to a flared opening. Specifically, the opening size of the first opening 131a close to the side where the forming chamber 11 is located is larger than the opening size of the second opening 131b far from the side where the forming chamber 11 is located. The first opening 131a expands upward to more effectively suck away the airflow blown by the air blowing port 121 and the corresponding splashed residues and dust. The first opening 131a expands downward to enable the air suction port 131 to match the airflow blown by the air blowing port 121 and will not blow away the normally working metal powder.

[0031] In a preferred embodiment, the position of the air suction port 131 in the vertical direction is slightly higher than the position of the air blowing port 121 in the vertical direction, so that the long strip-shaped air suction port 131 designed like a flared trumpet can better receive the air flow that blows out from the air blowing port 121 and flows obliquely upward from bottom to top, without blowing away the normally working metal powder.

[0032] In an alternative embodiment, a collection bucket (not shown in the figure) is provided below the first filter 141, and the splashing residues and soot are collected through the collection bucket.

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

[0034] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes the inherent elements thereof. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element. In addition, parts of the above technical solutions provided in the embodiments of this application that are consistent with the corresponding technical solutions in the prior art in terms of implementation principles are not described in detail to avoid excessive elaboration.

[0035] Specific examples are used in this text to elaborate on the principles and implementation manners of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can be made to this application, and the various embodiments in this application can be combined. 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 , comprising in sequence: a blowing module (12), a forming chamber (11), a suction module (13) and a filtering module (14); A printing platform (111) is provided at the bottom of the molding chamber (11), and the blowing module (12) comprises: a blowing port (121), a blowing fan (122), and a blowing duct (123); The air suction module (13) comprises: an air suction port (131) and an air suction duct (132); The filter module (14) comprises: a first filter (141), a filter pipe (142), and a second filter (143); the first filter (141) and the second filter (143) are connected via the filter pipe (142); The blowing fan (122) of the blowing module (12) is a cross-flow fan; The air blowing port (121), the air blowing duct (123), the air suction port (131), and the air suction duct (132) are all square ducts with long strip structures.

2. The dust removal device according to claim 1, characterized in that The blowing port (121) is provided with a first surface (121a) on a side close to the forming bin (11), and a plurality of rows of blowing holes (1211) are provided on the first surface (121a), and the first surface (121a) is a structure gradually inclined from bottom to top toward the side where the forming bin (11) is located.

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

4. The dust removal device according to claim 3, characterized in that The blowing holes (1211) in the upper row are arranged more densely than the blowing holes (1211) in the lower row, or the single blowing hole (1211) in the upper row is larger in size than the single blowing hole (1211) in the lower row.

5. The dust removal device according to claim 4, characterized in that The air suction port (131) is designed to be a long strip similar to a trumpet mouth, and the opening size of the first opening (131a) on the side close to the molding bin (11) is larger than the opening size of the second opening (131b) on the side away from the molding bin (11).

6. The dust removal device according to claim 5, characterized in that The vertical position of the air suction port (131) is slightly higher than the vertical position of the air blowing port (121).

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

8. The dust removal device according to claim 8, characterized in that: A collection bucket is provided below the first filter (141).

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

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