3D printing powder conveying and screening apparatus

Abstract

The application discloses a 3D printing powder conveying and screening equipment, which comprises a screening barrel and a motor frame, belongs to the powder screening technical field, and can drive the screening barrel to shake to screen the powder. The spring rubber on the outer wall of the screening barrel is repeatedly extruded and stretched during the shaking process, which can assist the screening barrel to shake and protect the screening barrel. After the vertical piezoelectric ceramic sheet and the horizontal piezoelectric ceramic sheet are electrified and stretched, the rubber ring can be deformed to drive the screening plate to produce displacement in the vertical direction and the horizontal direction, increase the shaking degree of the screening plate, and improve the screening efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of powder screening, and particularly relates to a 3D printing powder conveying and screening device. BACKGROUND

[0002] 3D printing or additive manufacturing is a new method for directly manufacturing parts from a digital model by layer-by-layer material accumulation, and has been widely applied to many technical fields. A large amount of printing powder is needed for 3D printing technology, and the particle diameters of the powder needed for different printing work are different. Therefore, the powder needs to be screened before printing. At present, the powder is mainly screened by a vibrating screening method. Since the particle size of the printing powder is relatively small, the hole size in the screening device is small, and the conventional vibrating screening method often causes blockage, which seriously restricts the screening efficiency. Therefore, a 3D printing powder conveying and screening device is needed to solve the above problems. SUMMARY

[0003] In view of the above problems, the present application provides a 3D printing powder conveying and screening device to solve the problems in the background art.

[0004] The technical scheme adopted by the present application is as follows: the present application provides a 3D printing powder conveying and screening device, which comprises a screening barrel and a motor frame, the motor frame is installed on the top wall of the screening barrel, an eccentric cam is rotatably connected to the top wall of the motor frame, a screening plate is arranged in the screening barrel, a rubber ring is fixedly connected to the outer ring of the screening plate, the rubber ring is fixed to the inner wall of the screening barrel, vertical piezoelectric ceramic pieces and horizontal piezoelectric ceramic pieces are arranged in the rubber ring, the vertical piezoelectric ceramic pieces are arranged on the upper and lower sides of the horizontal piezoelectric ceramic pieces, the vertical piezoelectric ceramic pieces can stretch and contract in the vertical direction after being electrified, and the horizontal piezoelectric ceramic pieces can stretch and contract in the horizontal direction after being electrified.

[0005] As a preferred technical scheme of the present application, the bottom end of the screening barrel is in the form of a funnel, and the bottom end of the screening barrel is in the form of an opening.

[0006] As a preferred technical scheme of the present application, the screening plate is provided in multiple groups, and the screening plates are arranged in an array in the vertical direction.

[0007] As a preferred technical scheme of the present application, the screening plate has a plurality of circular through holes, the sizes of the through holes on each screening plate are different, and the diameter of the through hole of the upper screening plate is larger than that of the through hole of the lower screening plate.

[0008] As a preferred technical scheme of the present application, elastic fixing blocks are installed on the upper and lower ends of the rubber ring, and the elastic fixing blocks are fixedly connected to the inner wall of the screening barrel.

[0009] As a preferred technical scheme of the present application, the eccentric cam is fixedly connected with the top end of the driving shaft, and the driving shaft penetrates through the motor frame and is rotatably connected with the motor frame.

[0010] As a preferred technical scheme of the present application, the bottom end of the driving shaft is connected with the output end of the driving motor, and the driving motor is installed on the top wall of the screening barrel.

[0011] As a preferred technical scheme of the present application, the upper side of the screening plate is provided with a material suction pipe, one end of the material suction pipe is located in the screening barrel, the other end of the material suction pipe is connected with a ring-shaped communication pipe, the ring-shaped communication pipe is arranged around the outer wall of the screening barrel, and the material suction pipe penetrates through the barrel wall of the screening barrel.

[0012] As a preferred technical scheme of the present application, the ring-shaped communication pipe is connected with one end of a conveying hose, the other end of the conveying hose is connected with a conveying pump, and the conveying pump is installed on the vertical plate, and the bottom end of the vertical plate is fixed on the base.

[0013] As a preferred technical scheme of the present application, the outer wall of the screening barrel is connected with one end of the spring rubber, the other end of the spring rubber is connected with a limiting plate, the bottom end of the limiting plate is fixed on the base, and a feeding pipe is further installed on the barrel wall of the screening barrel.

[0014] The 3D printing powder conveying and screening equipment provided by the present application has the following beneficial effects:

[0015] (1) The eccentric cam can drive the screening barrel to shake to screen the powder, and the spring rubber on the outer wall of the screening barrel is repeatedly squeezed and stretched during the shaking process, which can assist the screening barrel to shake and protect the screening barrel.

[0016] (2) After the vertical piezoelectric ceramic sheet and the horizontal piezoelectric ceramic sheet are electrified and stretched, the rubber ring can be deformed to drive the screening plate to produce displacement in the vertical direction and the horizontal direction, increase the shaking degree of the screening plate, and improve the screening efficiency.

[0017] (3) After the screening is completed, the material suction pipe can collect the powder on the screening plate without opening the screening barrel for manual collection, and after the collection is completed, the powder blocked on the screening plate can be removed by increasing the wind power.

[0018] (4) During the screening process, the amount of powder in the screening barrel gradually decreases, the weight of the screening barrel changes, the stress of the spring rubber in the vertical direction decreases, and the stretching range decreases, so that the shaking range of the spring rubber in the vertical direction can be reduced as the amount of powder decreases. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application provides a 3D printing powder conveying and screening equipment, and a schematic diagram of the overall structure of the 3D printing powder conveying and screening equipment is shown in the figure.

[0020] Figure 2 A top view of a 3D printing powder conveying and screening device according to the present application;

[0021] Figure 3 A schematic diagram of the overall structure of a screening barrel according to the present application;

[0022] Figure 4 A sectional view of a screening barrel according to the present application;

[0023] Figure 5 A schematic diagram of the internal structure of a screening barrel according to the present application;

[0024] Figure 6 A partial enlarged view of part A of Figure 4

[0025] 1, screening barrel, 101, screening plate, 102, rubber ring, 103, vertical piezoelectric ceramic sheet, 104, horizontal piezoelectric ceramic sheet, 105, elastic fixing block, 106, material extraction pipe, 107, annular communication pipe, 108, conveying hose, 109, conveying pump, 110, vertical plate, 111, spring rubber, 112, limiting plate, 113, feeding pipe, 2, motor frame, 201, driving motor, 202, driving shaft, 203, eccentric cam, 3, base.

[0026] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. Embodiments

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] As a new embodiment of the present application, as Figures 1-6 ​As shown, the present application provides a 3D printing powder conveying and screening device, which comprises a screening barrel 1 and a motor frame 2, the motor frame 2 is installed on the top wall of the screening barrel 1, the top wall of the motor frame 2 is rotationally connected with an eccentric cam 203, the screening barrel 1 is provided with a screening plate 101, the outer ring of the screening plate 101 is fixedly connected with a rubber ring 102, the rubber ring 102 is fixed on the inner wall of the screening barrel 1, the rubber ring 102 is provided with a vertical piezoelectric ceramic sheet 103 and a horizontal piezoelectric ceramic sheet 104, the vertical piezoelectric ceramic sheet 103 is located on the upper and lower sides of the horizontal piezoelectric ceramic sheet 104, the vertical piezoelectric ceramic sheet 103 can stretch and contract along the vertical direction after being electrified, and the horizontal piezoelectric ceramic sheet 104 can stretch and contract along the horizontal direction after being electrified.

[0029] As shown in Figure 3 and Figure 4 , the bottom end of the screening barrel 1 is funnel-shaped, and the bottom end of the screening barrel 1 is open.

[0030] As shown in Figure 4 , the screening plate 101 is provided with a plurality of groups, and the screening plate 101 is arranged in an array along the vertical direction.

[0031] As shown in Figure 4 , the screening plate 101 has a plurality of circular through holes, the sizes of the through holes on each screening plate 101 are different, and the diameter of the through hole of the upper screening plate 101 is larger than that of the lower screening plate 101.

[0032] As shown in Figure 5 and Figure 6 , the upper and lower ends of the rubber ring 102 are provided with elastic fixing blocks 105, and the elastic fixing blocks 105 are fixedly connected to the inner wall of the screening barrel 1.

[0033] As shown in Figure 3 and Figure 4 , the eccentric cam 203 is fixedly connected with the top end of the drive shaft 202, the drive shaft 202 penetrates the motor frame 2, and the drive shaft 202 is rotationally connected with the motor frame 2.

[0034] As shown in Figure 3 and Figure 4 , the bottom end of the drive shaft 202 is connected with the output end of the drive motor 201, and the drive motor 201 is installed on the top wall of the screening barrel 1.

[0035] As shown in Figure 3 and Figure 4 , the upper side of the screening plate 101 is provided with a material extraction pipe 106, one end of the material extraction pipe 106 is located in the screening barrel 1, the other end of the material extraction pipe 106 is connected with a ring-shaped communication pipe 107, the ring-shaped communication pipe 107 is arranged around the outer wall of the screening barrel 1, and the material extraction pipe 106 penetrates the barrel wall of the screening barrel 1.

[0036] AsFigures 1-4 As shown in the figure, the annular communication pipe 107 is connected with one end of the conveying hose 108, the other end of the conveying hose 108 is connected with the conveying pump 109, the conveying pump 109 is installed on the vertical plate 110, and the bottom end of the vertical plate 110 is fixed on the base 3.

[0037] As shown in the figure, the outer wall of the screening barrel 1 is connected with one end of the spring rubber 111, the other end of the spring rubber 111 is connected with the limiting plate 112, the bottom end of the limiting plate 112 is fixed on the base 3, and the barrel wall of the screening barrel 1 is also installed with the feeding pipe 113. Figures 1-4

[0038] In specific use, the user connects the conveying pump 109 with external conveying equipment or collecting equipment, conveys the printing powder into the screening barrel 1 through the feeding pipe 113, and then starts the driving motor 201, the driving motor 201 drives the driving shaft 202 to rotate, the driving shaft 202 drives the eccentric cam 203 to rotate, the eccentric cam 203 drives the screening barrel 1 to shake, and the screening plate 101 in the screening barrel 1 screens the powder, the spring rubber 111 on the outer wall is repeatedly extruded and stretched in the process of shaking the screening barrel 1, which can assist the screening barrel 1 to rotate and protect the screening barrel 1, and at the same time, part of the powder can flow out of the screening barrel 1 through the opening at the bottom of the screening barrel 1 in the screening process, the amount of powder in the screening barrel 1 gradually decreases, the weight of the screening barrel 1 changes, the force acting on the spring rubber 111 in the vertical direction decreases, the stretching range decreases, the shaking range of the spring rubber 111 in the vertical direction can be reduced with the decrease of the amount of powder, and at the same time, the rubber ring 102 can be deformed after the vertical piezoelectric ceramic sheet 103 and the horizontal piezoelectric ceramic sheet 104 are electrified and stretched, the screening plate 101 can be displaced in the vertical direction and the horizontal direction, the shaking degree of the screening plate 101 can be increased, and the screening efficiency can be improved, the conveying pump 109 is started after the screening is completed, the powder on the screening plate 101 can be collected by using the suction pipe 106, manual collection is not needed by opening the screening barrel 1, and after the collection is completed, the powder clogged on the screening plate 101 can be removed by increasing the wind power, and the above is the working process of the whole invention, and the steps can be repeated next time.

[0039] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.​

[0040] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since various modifications can be made by those skilled in the art, without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

[0041] The above description of the application and its embodiments is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the application, without creative design, similar structure and embodiments to the technical solution should belong to the protection scope of the application.

Claims

1. A 3D printing powder conveying and screening device, comprising a screening barrel (1) and a motor frame (2), the motor frame (2) is installed on the top wall of the screening barrel (1), and an eccentric cam (203) is rotatably connected to the top wall of the motor frame (2), characterized in that: a screening plate (101) is arranged in the screening barrel (1), a rubber ring (102) is fixedly connected to the outer ring of the screening plate (101), the rubber ring (102) is fixed to the inner wall of the screening barrel (1), vertical piezoelectric ceramic pieces (103) and horizontal piezoelectric ceramic pieces (104) are arranged in the rubber ring (102), the vertical piezoelectric ceramic pieces (103) are arranged on the upper and lower sides of the horizontal piezoelectric ceramic pieces (104), the vertical piezoelectric ceramic pieces (103) can stretch and contract in the vertical direction after being electrified, and the horizontal piezoelectric ceramic pieces (104) can stretch and contract in the horizontal direction after being electrified; the bottom end of the screening barrel (1) is in the shape of a funnel, and the bottom end of the screening barrel (1) is in the shape of an opening; a plurality of groups of the screening plate (101) are arranged, and the screening plate (101) is arranged in an array in the vertical direction; a plurality of circular through holes are formed in the screening plate (101), the through holes in each of the screening plates (101) are different in size, and the diameter of the through hole in the upper screening plate (101) is greater than that of the through hole in the lower screening plate (101); elastic fixing blocks (105) are arranged at the upper and lower ends of the rubber ring (102), and the elastic fixing blocks (105) are fixedly connected to the inner wall of the screening barrel (1); the eccentric cam (203) is fixedly connected to the top end of a driving shaft (202), the driving shaft (202) penetrates the motor frame (2), and the driving shaft (202) is rotatably connected to the motor frame (2); the bottom end of the driving shaft (202) is connected to the output end of a driving motor (201), and the driving motor (201) is installed on the top wall of the screening barrel (1); an extraction pipe (106) is arranged above the screening plate (101), one end of the extraction pipe (106) is located in the screening barrel (1), the other end of the extraction pipe (106) is connected to a ring-shaped communication pipe (107), the ring-shaped communication pipe (107) is arranged around the outer wall of the screening barrel (1), and the extraction pipe (106) penetrates the barrel wall of the screening barrel (1).

2. A 3D printing powder conveying and screening apparatus according to claim 1, characterized in that: one end of the ring-shaped communication pipe (107) is connected to one end of a conveying hose (108), the other end of the conveying hose (108) is connected to a conveying pump (109), the conveying pump (109) is installed on a vertical plate (110), and the bottom end of the vertical plate (110) is fixed to a base (3).

3. A 3D printing powder conveying and screening apparatus according to claim 2, characterized in that: the outer wall of the screening barrel (1) is connected to one end of a spring rubber (111), the other end of the spring rubber (111) is connected to a limiting plate (112), the bottom end of the limiting plate (112) is fixed to the base (3), and a feeding pipe (113) is further arranged on the barrel wall of the screening barrel (1).

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