Powder falling system for various kinds of 3D printing powder

Abstract

The utility model discloses a powder falling system for various 3D printing powders, which comprises a hopper used for containing powder raw materials and a powder bed, a plurality of storage parts are arranged in the hopper, the storage parts are separated by partition plates, the storage parts are communicated with first powder falling assemblies, the first powder falling assemblies are communicated with powder mixing assemblies, and the powder mixing assemblies are communicated with powder mixing assemblies. And the powder bed is communicated with the powder mixing assembly. The powder falling device has the advantages that the powder falling device can be applied to powder falling of various metal powder raw materials, and powder falling can be achieved after the various metal powder raw materials are mixed.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a powder dropping system for multiple 3D printing powders. Background Art

[0002] At present, 3D printing technology that uses powder as raw material and selective sintering / melting process to print parts is a hot topic in the field of rapid manufacturing. Typical technologies include selective laser sintering, selective laser melting, etc. The process flow of these technologies is similar: first, a layer of raw material powder is laid on the processing plane, and then the processing heat source partitions the powder according to the cross-sectional shape of the part to form the cross-sectional contour of the part.

[0003] 3D printing technology is a multidisciplinary system engineering technology. In 3D printing technology using powder as raw material, the molding process must include the storage and supply of powder raw materials. As the basis of process molding, the continuity and reliability of the storage and supply device of powder raw materials will inevitably have a decisive impact on the entire molding process.

[0004] As an important means of manufacturing parts, 3D printing technology has the following advantages: it adopts a layered manufacturing method, the complexity of the parts does not affect the molding, and any complex parts can be directly manufactured; the molding accuracy is high; metal parts are metallurgical bonds, and their performance exceeds that of traditional castings.

[0005] The metal powder raw materials are stored in a powder box, and when used, the powder raw materials are passed into the powder bed. The existing powder dropping method uses the powder's own gravity to make the powder fall into the powder bed. The existing powder dropping system can only drop powder for one type of metal powder raw material, and cannot be used for dropping powder for multiple metal powder raw materials, let alone mixing multiple metal powder raw materials and dropping powder.

[0006] Therefore, it is necessary to propose a powder dropping system for multiple 3D printing powders, which can not only be used for powder dropping of multiple metal powder raw materials, but also can mix multiple metal powder raw materials and then drop them. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a powder dropping system for multiple 3D printing powders, which can not only be used for powder dropping of multiple metal powder raw materials, but also can mix multiple metal powder raw materials and then drop them.

[0008] The purpose of the utility model is achieved through the following technical scheme: a powder dropping system for multiple 3D printing powders, including a hopper and a powder bed for containing powder raw materials, a plurality of storage parts are arranged in the hopper, the plurality of storage parts are separated by partitions, the plurality of storage parts are connected to a first powder dropping component, the plurality of the first powder dropping components are connected to a powder mixing component, and the powder bed is connected to the powder mixing component.

[0009] A stirring component connected to the powder mixing component is arranged between the powder mixing component and the powder bed.

[0010] A conveyor belt is arranged between the second powder dropping component and the powder bed, the powder bed is located at the terminal of the conveyor belt, a baffle is arranged between the terminal of the conveyor belt and the second powder dropping component, the baffle moves towards or away from the conveyor belt, and a first motor for driving the conveyor belt is arranged on the conveyor belt.

[0011] The stirring assembly comprises a stirring shell, a stirring shaft is rotatably arranged in the stirring shell, and a second motor for driving the stirring shaft to rotate is arranged on the stirring shell.

[0012] The first powder dropping component and the second powder dropping component both include a powder dropping shell, a powder dropping shaft is rotatably arranged in the powder dropping shell, a third motor for driving the powder dropping shaft to rotate is arranged on the powder dropping shell, a plurality of powder dropping groove groups are provided on the powder dropping shaft along its extension direction, and the powder dropping groove group consists of a plurality of powder dropping grooves which are arranged in a ring shape on the powder dropping shaft with the central axis of the powder dropping shaft as the center.

[0013] The powder mixing assembly comprises a powder mixing shell, a gear roller is rotatably arranged in the powder mixing shell, a fourth motor for driving the gear roller to rotate is arranged on the powder mixing shell, and a powder valve is arranged at one end of the powder mixing shell away from the hopper.

[0014] A screw rod and a slide rod are respectively arranged on both sides of the baffle plate. The baffle plate is connected to the screw rod threadedly rotating sleeve, and the baffle plate is connected to the slide rod sliding sleeve. The screw rod is connected to a fourth motor for driving the screw rod to rotate.

[0015] The first powder dropping component and the second powder dropping component both include an intermittent component, and the intermittent component includes a first moving part and a second moving part. One end of the second moving part is connected to the powder dropping shaft, and the other end is evenly provided with a plurality of slide grooves with three-side openings. The plurality of slide grooves are distributed in a ring with the center of the second moving part as the center of the circle. The first moving part is connected to a driving part that matches the size of the slide groove. The first moving part is connected to a third motor, and the plurality of slide grooves are all located on the moving track of the driving part.

[0016] The beneficial effects of the utility model are as follows: by arranging the partition and the powder mixing assembly, it is possible to not only shed a variety of metal powder raw materials, but also shed a variety of metal powder raw materials after mixing, which greatly improves the practicability compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the first schematic diagram of Embodiment 1 of the utility model;

[0018] Figure 2 This is a second schematic diagram of Embodiment 1 of the utility model;

[0019] Figure 3 This is a schematic diagram of the screw connection;

[0020] Figure 4 This is a schematic diagram of the first action component;

[0021] In the figure, 1-hopper, 11-storage part, 12-partition, 2-powder bed, 3-conveyor belt, 31-first motor, 4-baffle, 41-screw, 42-slide, 43-fifth motor, 51-powder falling shell, 52-powder falling shaft, 53-third motor, 54-powder falling trough, 55-first moving part, 56-second moving part, 57-slide, 58-driving part, 61-mixing shell, 62-mixing shaft, 63-second motor, 71-powder mixing shell, 72-tooth roller, 73-fourth motor, 74-powder valve. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0023] It is to be noted that the concepts of directions “left”, “right”, “up”, “down”, “front”, “back”, “inside” and “outside” in the following schemes are all relative directions and will not be listed one by one here.

[0024] A powder dropping system for various 3D printing powders, reference Figure 1 and Figure 2 , comprising a hopper 1. The hopper 1 is divided into three mutually unconnected receiving parts 11 by arranging two partitions 12. The three receiving parts 11 are respectively filled with different metal powder raw materials.

[0025] The lower ends of the three storage parts 11 are connected to a first powder dropping assembly. The first powder dropping assembly includes a powder dropping shell 51. A powder dropping shaft 52 is rotatably arranged in the powder dropping shell 51. A third motor 53 for driving the powder dropping shaft 52 to rotate is arranged on the powder dropping shell 51. A plurality of powder dropping groove groups are provided on the powder dropping shaft 52 along its extension direction, and the powder dropping groove group consists of a plurality of powder dropping grooves 54 arranged on the powder dropping shaft 52 in a ring shape with the central axis of the powder dropping shaft 52 as the center.

[0026] The lower ends of the three first powder dropping assemblies are all connected to the powder mixing housing 71. A gear roller 72 is arranged in the powder mixing housing 71. A fourth motor 73 is arranged on the powder mixing housing 71 for driving the gear roller 72 to rotate. A powder valve 74 is arranged at the lower end of the powder mixing housing 71.

[0027] The lower end of the powder mixing housing 71 is connected to a stirring housing 61. A stirring shaft 62 is rotatably arranged in the stirring housing 61. The stirring housing 61 is provided with a second motor 63 for driving the stirring shaft 62 to rotate.

[0028] A second powder dropping assembly is connected to the lower end of the stirring housing 61. The second powder dropping assembly has the same structure as the first powder dropping assembly.

[0029] The lower end of the second powder dropping assembly is provided with a conveyor belt 3. The conveyor belt 3 is provided with a first motor 31 for driving the conveyor belt 3 to work.

[0030] A baffle 4 is arranged above the conveyor belt 3. The baffle 4 moves up and down. There are many ways to drive the baffle 4 to move up and down, such as using a telescopic rod, which will not be described in detail here. A powder bed 2 is arranged below the terminal of the conveyor belt 3.

[0031] The first motor 31 , the second motor 63 , the third motor 53 and the fourth motor 73 are all motors with adjustable speeds.

[0032] The required powder materials are placed in different storage parts 11. The powder materials in the hopper 1 fall into the first powder dropping assembly and then into the powder mixing shell 71. After the powder is mixed, the powder valve is opened, and the mixed metal powder falls into the mixing shell 61. The mixing shaft 62 is stirred to make it uniform, and then falls into the powder dropping groove 54. The powder dropping shaft 52 rotates, and the powder in the powder dropping groove 54 falls onto the conveyor belt 3. The conveyor belt 3 transports the powder, and the height of the baffle 4 is adjusted to flatten the powder on the conveyor belt 3. The conveyor belt 3 evenly delivers the powder to the powder bed 2.

[0033] For further improvement of the present invention, the above cases can be further extended to provide a variety of new embodiments.

[0034] As a second embodiment of the present invention, based on Embodiment 1, Figure 4, a screw rod 41 and a slide rod 42 are respectively arranged on both sides of the baffle plate 4. The baffle plate 4 is connected to the screw rod 41 by a threaded rotation sleeve, and is connected to the slide rod 42 by a sliding sleeve. The screw rod 41 is connected to a fifth motor 43 for driving the screw rod 41 to rotate.

[0035] The output end of the third motor 53 is connected to the first moving member 55. One end of the second moving member 56 is connected to the powder dropping shaft 52, and the other end is evenly provided with a plurality of chute grooves 57 with three-side openings. The plurality of chute grooves 57 are distributed in a ring with the center of the second moving member 56 as the center. The first moving member 55 is connected to a driving member 58 whose size matches that of the chute grooves 57. The plurality of chute grooves 57 are all located on the moving track of the driving member 58. The number of chute grooves 57 matches the number of powder dropping grooves 54 in the powder dropping groove group.

[0036] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above description or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A powder dropping system for multiple 3D printing powders, comprising a hopper (1) for containing powder raw materials and a powder bed (2), characterized in that: A plurality of storage sections (11) are provided in the hopper (1), the plurality of storage sections (11) are separated by partitions (12), the storage sections (11) are all connected to a first powder dropping assembly, the plurality of first powder dropping assemblies are all connected to a powder mixing assembly, and the powder bed (2) is connected to the powder mixing assembly.

2. A powder dropping system for multiple 3D printing powders according to claim 1, characterized in that: A stirring component connected to the powder mixing component is provided between the powder mixing component and the powder bed (2).

3. A powder dropping system for multiple 3D printing powders according to claim 2, characterized in that: A second powder dropping component in communication with the stirring component and the powder bed (2) is provided between the stirring component and the powder bed (2).

4. A powder dropping system for multiple 3D printing powders according to claim 3, characterized in that: A conveyor belt (3) is arranged between the second powder dropping component and the powder bed (2), the powder bed (2) is located at the terminal of the conveyor belt (3), a baffle (4) is arranged between the terminal of the conveyor belt (3) and the second powder dropping component, the baffle (4) moves towards or away from the conveyor belt (3), and a first motor (31) for driving the conveyor belt (3) is arranged on the conveyor belt (3).

5. A powder dropping system for multiple 3D printing powders according to claim 2, characterized in that: The stirring assembly comprises a stirring shell (61), a stirring shaft (62) is rotatably arranged in the stirring shell (61), and a second motor (63) for driving the stirring shaft (62) to rotate is arranged on the stirring shell (61).

6. A powder dropping system for multiple 3D printing powders according to claim 3, characterized in that: The first powder dropping assembly and the second powder dropping assembly both comprise a powder dropping shell (51), a powder dropping shaft (52) being rotatably arranged in the powder dropping shell (51), a third motor (53) being arranged on the powder dropping shell (51) for driving the powder dropping shaft (52) to rotate, a plurality of powder dropping groove groups being provided on the powder dropping shaft (52) along its extension direction, the powder dropping groove group comprising a plurality of powder dropping grooves (54) being annularly arranged on the powder dropping shaft (52) with the central axis of the powder dropping shaft (52) as the center.

7. The system for discharging multiple 3D printing powders according to claim 1, characterized in that: The powder mixing assembly comprises a powder mixing housing (71), a toothed roller (72) being rotatably arranged inside the powder mixing housing (71), a fourth motor (73) being arranged on the powder mixing housing (71) for driving the toothed roller (72) to rotate, and a powder valve (74) being arranged at one end of the powder mixing housing (71) away from the hopper (1).

8. A powder dropping system for multiple 3D printing powders according to claim 4, characterized in that: A screw rod (41) and a slide rod (42) are respectively provided on both sides of the baffle plate (4); the baffle plate (4) is connected to the screw rod (41) by a threaded rotation sleeve; the baffle plate (4) is connected to the slide rod (42) by a sliding sleeve; and the screw rod (41) is connected to a fifth motor (43) for driving the screw rod (41) to rotate.

9. A powder dropping system for multiple 3D printing powders according to claim 6, characterized in that: The first powder dropping assembly and the second powder dropping assembly both include an intermittent assembly, and the intermittent assembly includes a first moving member (55) and a second moving member (56). One end of the second moving member (56) is connected to the powder dropping shaft (52), and the other end is evenly provided with a plurality of slide grooves (57) with three-side openings. The plurality of slide grooves (57) are distributed in a ring shape with the center of the second moving member (56) as the center of the circle. The first moving member (55) is connected to a driving member (58) whose size matches that of the slide groove (57). The first moving member (55) is connected to a third motor (53), and the plurality of slide grooves (57) are all located on the moving track of the driving member (58).

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