CN214812462U

CN214812462U - Powder screening device

Info

Publication number: CN214812462U
Application number: CN202120144052.1U
Authority: CN
Inventors: 龙勇刚; 杜文栋; 谭建均; 田龙龙; 秦林
Original assignee: Andron Chongqing Material Technology Co ltd
Current assignee: Andron Chongqing Material Technology Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-11-23
Anticipated expiration: 2031-01-19

Abstract

The utility model relates to a 3D prints metal powder technical field, concretely relates to powder sieve powder device, including casing and shake mechanism, the casing includes feeding section, sieve powder section and ejection of compact section in proper order, the internal diameter of sieve powder section is greater than the feeding section the internal diameter of ejection of compact section, sieve powder section slope is installed the screen cloth. The utility model discloses a screen cloth of installation slope in the casing, at the top installation powder bucket of feeding section, be connected with the screening machine through the spiral feeder in the bottom of ejection of compact section, can replace gas in the screening machine for all be full of inert gas in the whole casing. Therefore, the metal powder in the powder barrel falls onto the screen mesh and is primarily screened out larger metal blocks/pieces through the screen mesh, so that the normal and continuous operation of the spiral feeder is ensured; therefore, labor force is saved, and working efficiency is improved.

Description

Powder screening device

Technical Field

The utility model relates to a 3D prints metal powder technical field, concretely relates to powder sieve powder device.

Background

The 3D printing is an advanced forming technology for printing and stacking the cross section of a model with any shape layer by layer, and has wide application prospect in the fields of medical treatment and health, aerospace, mechanical electronics and the like. 3D printed materials are very extensive, and macromolecules, ceramics, metal materials and the like can be printed and molded. 3D printing consumables require can liquefy, powderize to have reasonable mechanical properties. The 3D printing of metal parts, being the most advanced and potential technology in the whole 3D printing system, is an important development direction of advanced manufacturing technology. The main methods for preparing metal powder include a reduction method, an electrolysis method, a milling method, and an atomization method, wherein the atomization method is one of the main methods for preparing metal powder for 3D printing.

The atomization method is that after the metal is liquefied, the metal flows into a tundish, flows into a spray tray from the tundish, and blows air into the spray tray to break the metal liquid into metal particles which are then cooled. The metal liquid is formed into fine metal particle powder by air cooling, and since the particle size of the formed metal powder may be non-uniform, it is necessary to store the metal powder having different particle sizes separately by using a sieving machine. When the molten metal is formed into metal powder, metal blocks or metal sheets may be formed due to various reasons, so that the metal powder needs to be sieved out before entering a sieving machine, so that the blocky metal can not damage a sieving screen of the sieving machine or block a spiral feeder, and the powder quality is not affected or the continuous feeding and sieving production of a production line is blocked.

The existing method is to sieve out metal blocks in metal powder manually by workers, which not only wastes labor force, but also has high labor intensity and low working efficiency. On the other hand, in the manual sieving of the metal block type, the metal powder is exposed to air, so that the oxygen content in the powder is increased and the powder is easily oxidized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses increased workman's intensity of labour when screening to present manual work, work efficiency is low and artifical screening is screening in the air, and the problem of the easy oxidation of metal powder provides a powder sieve powder device.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a powder screening device comprises a shell and a shaking mechanism, wherein the shell sequentially comprises a feeding section, a powder screening section and a discharging section; the inner diameter of the powder sieving section is larger than the inner diameters of the feeding section and the discharging section, and a screen is obliquely arranged on the powder sieving section; the shaking mechanism is connected with the screen and used for shaking the screen. If the metal powder contains more metal blocks and metal sheets, the screen can be blocked, so that the screen is vibrated by the shaking mechanism, and the metal powder can pass through the screen conveniently.

Preferably, the screen is installed on the diagonal line of the cross section of the powder sieving section.

Preferably, the shaking mechanism vibrates using ultrasonic waves or a vibration motor. As long as can make the screen cloth produce the shake can, this application adopts the ultrasonic wave to vibrate, can also shake the screen cloth through setting up vibrating motor certainly.

Preferably, the inner wall of the feeding section is provided with a guide sliding plate which inclines downwards in an opposite direction to the inclination direction of the screen. Through setting up the direction slide of slope at the feeding section, and the incline direction of direction slide is opposite with the incline direction of screen cloth to metal powder falls on the slide, from the top of screen cloth landing downwards after the direction, makes the metal block like this can gather in the bottom of screen cloth under the effect of self gravity and shake, can not block the sieve of metal powder and fall.

Preferably, a sealing ring is arranged around the screen to prevent the metal powder from falling below without passing through the screen.

Preferably, the side edge of the powder sieving section is provided with a baffle. After the sieve is used for a period of time, the baffle can be opened to clean the metal blocks on the sieve in time.

Preferably, a transparent observation window is arranged at the joint of the feeding section and the powder sieving section. The condition of the screen can be observed in time through the transparent observation window so as to clean the metal blocks/metal sheets in time.

Compared with the prior art, the beneficial effects of the utility model are that: through the screen cloth of installation slope in the casing, at the top installation powder bucket of feeding section, be connected through the screw feeder screening machine in the bottom of ejection of compact section with the bottom that passes through the spiral feeder screening machine, can replace gas in the screening machine for all be full of inert gas in the whole casing. Therefore, the metal powder in the powder barrel falls onto the screen mesh and is primarily screened by the screen mesh to remove larger metal blocks/pieces, so that the normal and continuous operation of the spiral feeder is ensured; therefore, labor force is saved, and working efficiency is improved.

Description of the drawings:

fig. 1 is a schematic structural view of the powder sieving device provided by the present invention.

Fig. 2 is a top view of the powder sieving device provided by the present invention.

Fig. 3 is a schematic structural diagram of a screen and a shaking mechanism.

The labels in the figure are: 1-shell, 11-feeding section, 12-powder sieving section, 13-discharging section, 2-guide sliding plate, 3-screen, 4-shaking mechanism, 5-sealing ring, 6-baffle and 7-observation window.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the utility model provides a powder screening device, including casing 1 and shake mechanism 4, casing 1 includes feeding section 11, sieve powder section 12 and ejection of compact section 13 in proper order, the internal diameter of sieve powder section 12 is greater than feeding section 11 the internal diameter of ejection of compact section 13. The top of the feeding section 11 is connected with a powder barrel filled with metal powder, and the bottom of the discharging section 13 is connected with a sieving machine through a spiral feeder.

In one or more embodiments, the inner diameter of the powder sieving section 12 corresponding to the middle is larger than the inner diameters of the feeding section 11 and the discharging section 13 at two sides, and the screen 3 is obliquely arranged in the inner cavity of the powder sieving section 12; a packing 5 is attached around the screen 3, and the inclination angle of the screen can be adjusted by the position or thickness of the packing 5. Preferably, the screen 3 is arranged on the diagonal of the cross section of the inner cavity of the powder sieving section 12, so that the screen 3 arranged obliquely does not fall off. By replacing the sealing ring 5 with different thickness, the inclination angle of the screen 3 can be adjusted and the sealing function can be achieved.

In order to sieve the metal powder more quickly, in one or more embodiments, a shaking mechanism 4 is installed on the side edge of the screen 3, and the metal powder can fall more quickly by vibrating the screen 3 through the shaking mechanism 4; and because the screen cloth 3 is the slope setting, the metal block can more quickly landing to the lowest of screen cloth 3 under the effect of shake, can not stop in the middle part and cause the metal powder jam. The shaking mechanism 4 in this embodiment may be vibrated by ultrasonic waves, and may also be a vibration motor to vibrate the screen 3.

In order to be able to extend the sifting path of the metal powder, in one or more embodiments, guide slides 2 are therefore provided on the inner wall of the feed section 11. The guide sliding plate 2 is obliquely arranged, and the oblique direction of the guide sliding plate 2 is opposite to that of the screen cloth 3; one end of the guide sliding plate 2 can be connected with the shell 1 through a bolt, and a certain gap is formed between the other end of the guide sliding plate and the inner wall of the feeding section 11, so that metal powder and metal blocks can slide onto the screen 3. In order to observe the condition of the sifted powder in real time, in one or more embodiments, a transparent observation window 7 is arranged at the joint of the feeding section 11 and the sifting section 12, because the metal blocks are gathered to the lowest part of the screen cloth 3 under the action of shaking.

In one or more embodiments, baffles 6 are provided on the sides of the sifter section 12. When the metal blocks on the lowest part of the screen cloth 3 are seen to be more through the observation window 7, the baffle 6 can be opened to clean the metal blocks on the screen cloth 3.

The working process is as follows: the powder bucket that will be equipped with the metal powder with the utility model provides a powder sieve powder device's feed section 11 is connected, passes through the spiral feeder with the screening machine and is connected with ejection of compact section 13. The gas replacement switch of the sieving machine is opened to replace the air in the housing 1 and the sieving machine with inert gas. And starting the shaking mechanism 4, opening a valve of the powder barrel, sliding the metal powder onto the screen mesh 3 through the guide sliding plate 2, sieving the metal powder with the particle size smaller than the aperture of the screen mesh 3, and sieving the metal powder with different particle sizes in the sieving machine. The metal particles and metal blocks with the particle diameter larger than the aperture of the screen 3 are blocked by the screen 3 and slide down to the lowest part of the screen 3 under the action of the self gravity and the shaking of the screen 3. When more metal blocks remain on the pipeline screen 3 through the observation window 7, the valve of the powder barrel is closed, the sieving machine is closed, then the baffle 6 is opened, after the metal blocks are cleared away, the valve of the powder barrel is opened after the gas replacement switch of the sieving machine is opened again. Like this the whole in-process that the metal powder is from powder bucket to sieve powder device to the screening machine again all with air isolation, reduced the probability that the metal powder is oxidized, be automatic through whole sieve powder process, reduced the labour, alleviateed workman's intensity of labour, improved work efficiency.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The powder screening device is characterized by comprising a shell (1) and a shaking mechanism (4), wherein the shell (1) sequentially comprises a feeding section (11), a powder screening section (12) and a discharging section (13); the inner diameter of the powder sieving section (12) is larger than the inner diameters of the feeding section (11) and the discharging section (13), and the powder sieving section (12) is obliquely provided with a screen (3); the shaking mechanism (4) is connected with the screen (3) and is used for shaking the screen (3).

2. The powder sifting apparatus of claim 1, wherein the screen (3) is mounted on a diagonal of the cross-section of the sifter section (12).

3. The powder sifting apparatus of claim 1, wherein the shaking mechanism (4) is vibrated using ultrasonic waves or a vibration motor.

4. The powder sifting apparatus of claim 1 or 2, wherein the inner wall of the feed section (11) is provided with a guide slide (2) which is inclined downwards, the direction of inclination of the guide slide (2) being opposite to the direction of inclination of the sieve screen (3).

5. The powder sifting apparatus of claim 1, wherein a sealing ring (5) is provided around the screen (3).

6. The powder sifting apparatus of claim 1, wherein the side of the sifter section (12) is fitted with a baffle (6).

7. The powder sifting apparatus of claim 1, wherein the junction of the feed section (11) and the sifting section (12) is provided with a transparent viewing window (7).