Adjustable uniform powder falling system

Abstract

The utility model discloses an adjustable uniform powder falling system which comprises a hopper used for containing powder raw materials and a powder bed, a powder falling assembly communicated with the hopper is arranged between the powder bed and the hopper, and a conveying belt is arranged between the powder falling assembly and the powder bed. A baffle capable of moving close to or away from the conveying belt is arranged between the end of the conveying belt and the powder falling assembly, a first motor used for driving the conveying belt to move is arranged on the conveying belt, and a second motor used for driving the powder falling assembly to work is arranged on the powder falling assembly. The powder feeding device has the advantages that powder can evenly fall into the powder bed, and the amount of the powder falling into the powder bed can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to an adjustable uniform powder dropping system. 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 the powder raw materials are passed into the powder bed when used. The existing powder dropping method uses the powder's own gravity to make the powder fall into the powder bed. However, this method cannot make the powder fall into the powder bed evenly, and the amount of powder falling cannot be adjusted.

[0006] Therefore, it is necessary to propose an adjustable uniform powder dropping system to achieve uniform powder falling into the powder bed and to adjust the amount of powder falling into the powder bed. Utility Model Content

[0007] The utility model aims to overcome the deficiencies of the prior art and provides an adjustable uniform powder dropping system, which enables powder to fall uniformly into a powder bed and can adjust the amount of powder falling into the powder bed.

[0008] The purpose of the utility model is achieved through the following technical solutions: an adjustable uniform powder dropping system, comprising a hopper and a powder bed for containing powder raw materials, a powder dropping assembly connected to the hopper is arranged between the powder bed and the hopper, a conveyor belt is arranged between the powder dropping assembly and the powder bed, a baffle that can move closer to or away from the conveyor belt is arranged between the end of the conveyor belt and the powder dropping assembly, a first motor for driving the conveyor belt to move is arranged on the conveyor belt, and a second motor for driving the powder dropping assembly to work is arranged on the powder dropping assembly.

[0009] The powder dropping assembly includes a powder dropping shell, a powder dropping shaft is rotatably arranged between the powder dropping shells, a plurality of powder dropping groove groups are provided on the powder dropping shaft along its extension direction, the powder dropping groove group consists of a plurality of powder dropping grooves which are annularly arranged on the powder dropping shaft with the central axis of the powder dropping shaft as the center, and the second motor is arranged on the powder dropping shell to drive the powder dropping shaft to rotate.

[0010] The powder dropping component includes 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 matching the size of the slide groove. The first moving part is connected to a second motor, and the plurality of slide grooves are all located on the moving track of the driving part.

[0011] The first motor and the second motor are motors with adjustable speed.

[0012] A stirring component is arranged between the powder dropping component and the hopper.

[0013] The stirring assembly comprises a stirring shell, a stirring shaft is rotatably arranged in the stirring shell, and a third motor for driving the stirring shaft to rotate is arranged on the stirring shell.

[0014] The third motor is a motor with adjustable speed.

[0015] 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.

[0016] The beneficial effect of the utility model is that by setting a baffle, the metal powder on the conveyor belt can be flattened to achieve uniform falling of the metal powder into the powder bed, and by adjusting the distance between the baffle and the conveyor belt, the thickness of the metal powder on the conveyor belt can be controlled, thereby controlling the amount of metal powder on the conveyor belt falling into the powder bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an attempt to implement Example 1 of the utility model;

[0018] Figure 2 is a schematic diagram of the stirring shaft;

[0019] Figure 3 It is a schematic diagram of the powder dropping axis;

[0020] Figure 4 This is a schematic diagram of the screw connection;

[0021] Figure 5 This is a schematic diagram of the first action component;

[0022] In the figure, 1-hopper, 2-powder bed, 3-conveyor belt, 31-first motor, 4-baffle, 41-screw, 42-slide, 43-fourth motor, 51-second motor, 52-powder falling shell, 53-powder falling shaft, 54-powder falling trough, 55-first moving part, 56-second moving part, 57-chute, 58-driving part, 61-stirring shell, 62-stirring shaft, 63-third motor. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] An adjustable uniform powder dropping system, reference Figure 1-Figure 3 , including a hopper 1. A stirring shell 61 is connected to the lower end of the hopper 1. A stirring shaft 62 is rotatably arranged in the stirring shell 61. A third motor 63 for driving the stirring shaft 62 to rotate is arranged on the stirring shell 61.

[0026] The lower end of the stirring shell 61 is connected to a powder dropping shell 52. A powder dropping shaft 53 is rotatably arranged in the powder dropping shell 52. The powder dropping shaft 53 is provided with a plurality of powder dropping grooves along its extension direction. The powder dropping groove group is composed of a plurality of powder dropping grooves 54 uniformly distributed in an annular shape with the center of the powder dropping shaft 53 as the center. The powder dropping grooves 54 are arranged on the powder dropping shaft 53. The powder dropping shell 52 is provided with a plurality of powder dropping grooves 54 for driving the powder dropping shaft 53 to rotate.

[0027] A conveyor belt 3 is provided at the lower end of the powder dropping housing 52. A first motor 31 for driving the conveyor belt 3 is provided. A baffle plate 4 is provided above the terminal end of the conveyor belt 3. The baffle plate 4 moves up and down. There are many ways to drive the baffle plate 4 to move up and down, such as using a telescopic rod drive, etc. Since it is a prior art, it will not be described in detail here. A powder bed 2 is provided below the terminal end of the conveyor belt 3.

[0028] The first motor 31 , the second motor 51 and the third motor 63 are all motors with adjustable speeds.

[0029] The powder material in the hopper 1 falls into the mixing shell 61, is mixed by the mixing shaft 62 to make it uniform, and then falls into the powder dropping groove 54. The powder dropping shaft 53 rotates, and the powder in the powder dropping groove 54 falls onto the conveyor belt 3, which transports the powder. 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.

[0030] For further improvement of the present invention, the above cases can be further extended to provide a variety of new embodiments.

[0031] As a second embodiment of the present invention, based on Embodiment 1, Figure 4 and Figure 5 , 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 fourth motor 43 for driving the screw rod 41 to rotate.

[0032] The output end of the second motor 51 is connected to the first moving member 55. One end of the second moving member 56 is connected to the powder dropping shaft 53, and the other end is evenly provided with a plurality of chutes 57 with three-side openings. The plurality of chutes 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 chutes 57. The plurality of chutes 57 are all located on the moving track of the driving member 58. The number of chutes 57 matches the number of powder dropping grooves 54 in the powder dropping groove group.

[0033] 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. An adjustable uniform powder dropping system, comprising a hopper (1) for containing powder raw materials and a powder bed (2), characterized in that: A powder dropping component connected to the hopper (1) is provided between the powder bed (2) and the hopper (1), a conveyor belt (3) is provided between the powder dropping component and the powder bed (2), a baffle (4) capable of moving toward or away from the conveyor belt (3) is provided between the end of the conveyor belt (3) and the powder dropping component, a first motor (31) for driving the conveyor belt (3) to move is provided on the conveyor belt (3), and a second motor (51) for driving the powder dropping component to work is provided on the powder dropping component.

2. The adjustable uniform powder dropping system according to claim 1, characterized in that: The powder dropping assembly comprises a powder dropping shell (52), a powder dropping shaft (53) is rotatably arranged between the powder dropping shell (52), a plurality of powder dropping groove groups are provided on the powder dropping shaft (53) along its extension direction, the powder dropping groove group comprises a plurality of powder dropping grooves (54) annularly arranged on the powder dropping shaft (53) with the central axis of the powder dropping shaft (53) as the center, and the second motor (51) is arranged on the powder dropping shell (52) for driving the powder dropping shaft (53) to rotate.

3. The adjustable uniform powder dropping system according to claim 2, characterized in that: The powder dropping component includes an intermittent component, and the intermittent component 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 (53), and the other end is evenly provided with a plurality of slide grooves (57) with three-side openings. The number of the slide grooves (57) matches the number of the powder dropping grooves (54) in the powder dropping groove group. 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 second motor (51), and the plurality of slide grooves (57) are all located on the moving track of the driving member (58).

4. The adjustable uniform powder dropping system according to claim 1, characterized in that: The first motor (31) and the second motor (51) are motors with adjustable speeds.

5. The adjustable uniform powder dropping system according to claim 1, characterized in that: A stirring component is provided between the powder dropping component and the hopper (1).

6. The adjustable uniform powder dropping system according to claim 5, characterized in that: The stirring assembly comprises a stirring shell (61), a stirring shaft (62) is rotatably arranged inside the stirring shell (61), and a third motor (63) for driving the stirring shaft (62) to rotate is arranged on the stirring shell (61).

7. The adjustable uniform powder dropping system according to claim 6, characterized in that: The third motor (63) is a motor with adjustable speed.

8. The adjustable uniform powder dropping system according to claim 1, 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 fourth motor (43) for driving the screw rod (41) to rotate.

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