CN212419646U

CN212419646U - Powder paving device and additive manufacturing device

Info

Publication number: CN212419646U
Application number: CN202021535922.XU
Authority: CN
Inventors: 郭超; 梁爽; 李龙; 马旭龙; 阚文斌
Original assignee: Tianjin Qingyan Zhishu Technology Co ltd
Current assignee: Tianjin Qingyan Zhishu Technology Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-01-29
Anticipated expiration: 2030-07-29

Abstract

The utility model belongs to the technical field of the vibration material disk, a spread powder device and vibration material disk device is disclosed, spread the powder device and include: the powder laying platform is provided with a first position and a second position; the powder box is arranged above the powder laying platform; the powder pouring box is rotationally connected with the powder box and can open or close the powder outlet of the powder box through rotation; the scraper is arranged on the powder spreading platform in a sliding manner and can drive the powder pouring box to rotate; when the scraper slides to the second position from the first position, the powder outlet is opened by the powder pouring box, powder in the powder box is conveyed to the powder scraping side of the scraper, and when the scraper leaves the second position, the powder outlet is closed by the powder pouring box. The utility model discloses a scraper is in the removal between two positions of first position and second position, can realize falling the rotation of powder box, and then realize that the powder of powder incasement is carried to scraping of scraper powder side through falling the powder box, can effectively control the conveying capacity of powder incasement powder, and the powder volume of having guaranteed every layer of transport is enough, the too much or too little condition can not appear.

Description

Powder paving device and additive manufacturing device

Technical Field

The utility model relates to a vibration material disk technical field especially relates to a spread powder device and vibration material disk device.

Background

Additive manufacturing (3D printing) is a manufacturing technique for building three-dimensional objects by successively fusing more than one thin layer of material. Powder bed type additive manufacturing is one of additive manufacturing technical routes, and the basic process steps are as follows: the three-dimensional model is stored in a computer, and the model is layered to obtain the section data of each layer. The powder system (device) spreads the powder material into a thin layer on the working platform, and a high-energy-density ray beam (laser or electron beam) scans a section of the three-dimensional model on the powder layer; then, the working platform descends by the thickness of one powder layer, a new layer of powder is laid on the working platform, and the next section of the three-dimensional model is scanned by rays; and repeating the steps until the three-dimensional object is manufactured.

In the existing additive manufacturing device, when the powder spreading device is used for supplying and spreading powder, the following problems can be caused:

1. the amount of powder provided by each layer of printing is excessive, and a large amount of powder is accumulated in long-time printing and finally overflows a forming platform.

2. The powder provided by each layer of printing is too little to meet the required powder dosage for each layer of printing, so that parts are partially lost, and printing failure is caused.

3. The powder provided by each layer is not uniform, and partial areas are not enough in powder, so that parts are partially lost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spread powder device and vibration material disk device can ensure that the enough and ration of powder volume of every layer of laying, and the powder layer of laying is even.

To achieve the purpose, the utility model adopts the following technical proposal:

a powder spreading device comprising:

the powder spreading platform is provided with a first position and a second position;

the powder box is arranged above the powder laying platform;

the powder pouring box is rotationally connected with the powder box and can open or close the powder outlet of the powder box through rotation;

the scraper is arranged on the powder spreading platform in a sliding mode and can drive the powder pouring box to rotate;

the scraper by first position slides to during the second position, the powder box of falling is opened go out the powder mouth, and will powder in the powder case is carried extremely the powder side of scraping of scraper, the scraper leaves when the second position, the powder box of falling seals go out the powder mouth.

Preferably, a gear is fixedly arranged on one side of the powder pouring box, a rack which can be meshed with the gear is arranged on the scraper, and the rack drives the gear to rotate in the process that the scraper slides from the first position to the second position, so that the powder outlet is opened by the powder pouring box; the scraper slides to the in-process of first position by the second position, rack drive gear revolve to make the powder pouring box close the powder outlet.

Preferably, a counterweight is arranged on the powder pouring box, and the counterweight is configured to enable the powder pouring box to keep a state of closing the powder outlet when the scraper leaves the second position.

Preferably, the powder box is provided with a limiting block, and the limiting block is configured to abut against the powder pouring box when the powder pouring box rotates to a horizontal state. .

Preferably, the powder spreading device further comprises a powder baffle plate, and the powder baffle plate is positioned on the non-powder-scraping side of the scraper.

Preferably, a channel is formed in the powder pouring box, an opening at one end of the channel is a powder receiving opening, an opening at the other end of the channel is a powder conveying opening, the powder receiving opening is communicated with the powder outlet, and the powder conveying opening can point to the powder paving platform.

Preferably, the powder case is equipped with two, two the powder case branch is arranged in spread the both ends department of powder platform, every the powder case all rotates and connects one the powder box that falls, the scraper can drive arbitrary one the powder box that falls rotates.

Preferably, the scraper is provided with two racks, one of the racks can be meshed with the gear on one of the powder pourers, and the other rack can be meshed with the gear on the other of the powder pourers.

Preferably, the powder paving device further comprises side baffles arranged on two sides of the powder paving platform.

The utility model also provides a vibration material disk device includes foretell shop's powder device.

The utility model has the advantages that: through the scraper removal between two positions in primary importance and second position, can realize falling the rotation of powder box, and then realize that the powder of powder incasement carries to scraping of scraper powder side through falling the powder box, can effectively control the conveying capacity of powder in the powder incasement, and the powder volume on every layer of having guaranteed to carry is enough, the too much or too little condition can not appear. But also the laid powder layer can be made uniform.

In addition, after laying one deck powder, pile up the certain degree along with the powder, it can cross the scraper to scraping the powder side, and when the powder piles up the volume that satisfies the powder requirement of one deck, because the natural rest characteristic that the powder flows, this powder can the shutoff fall the defeated powder mouth of powder box, and the powder of powder incasement can't flow out to shop's powder platform, and the scraper can directly lay accumulational powder, and then avoids powder accumulational more and more on shop's powder platform.

Drawings

Fig. 1 is a schematic structural diagram of a powder spreading device provided in an embodiment of the present invention;

fig. 2 is a cross-sectional view of a powder spreading device provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a powder pouring box according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating a state of the powder pouring box closing the powder outlet according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a state of the powder discharging opening of the powder pouring box according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a scraper cooperating with a powder pouring box according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a powder spreading device provided by the second embodiment of the present invention;

fig. 8 is a cross-sectional view of a powder laying device provided by the second embodiment of the present invention;

fig. 9 is a schematic structural diagram of the scraper and the powder pouring box provided by the second embodiment of the present invention.

In the figure:

1. a powder laying platform; 2. powder box; 21. a powder outlet; 3. pouring the powder box; 31. a powder receiving port; 32. a powder conveying port; 33. a rotating shaft; 4. a scraper; 41. a support; 5. a gear; 6. a rack; 7. balancing weight; 8. a limiting block; 9. a powder baffle plate; 10. side dams.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The embodiment provides a powder laying device, which is applied to an additive manufacturing device and is used for laying powder to a forming cylinder position of the additive manufacturing device, as shown in fig. 1 and fig. 2, the powder laying device comprises a powder laying platform 1, a powder box 2, a powder pouring box 3 and a scraper 4, wherein the scraper 4 is movably arranged on the powder laying platform 1 so as to carry out powder laying operation on the powder laying platform 1. A forming cylinder is arranged at the powder laying platform 1, and the scraper 4 can lay the powder at the forming cylinder so as to facilitate the subsequent additive manufacturing operation. The powder box 2 is arranged above the powder laying platform 1, is used for storing powder and enables the powder to flow out from the powder outlet 21 below. The powder pouring box 3 is rotatably installed at the powder outlet 21 of the powder box 2, can open and close the powder outlet 21, and can guide the powder flowing out through the powder outlet 21 of the powder box 2 to the powder spreading platform 1.

In this embodiment, the powder laying platform 1 is provided with a first position and a second position, the first position and the second position are arranged at intervals, and are both located at one end of the powder laying platform 1. The first position is located behind the second position in the moving direction of the doctor blade 4. Above-mentioned scraper 4 can stop at primary importance and second position, and scraper 4 when the stop at the second position, the powder is carried to shop's powder platform 1 on, and the powder falls to the position that shop's powder platform 1 on and is located the powder side of scraping of scraper 4.

Preferably, the powder laying platform 1 is provided with side baffles 10 on the left and right sides along the powder laying direction in the embodiment, and the side baffles 10 are used for preventing powder from overflowing the powder laying platform 1 through the left and right sides in the powder laying process. Furthermore, powder blocking plates 9 can be arranged on the front side and the rear side of the powder paving platform 1 in the powder paving direction, the powder blocking plates 9 are located on the non-powder scraping side of the scraper 4, and powder can be prevented from overflowing the powder paving platform 1 from the front side and the rear side.

In this embodiment, the powder box 2 is provided with one, and it sets up in the one end department of shop's powder platform 1, and the shop's powder device of this embodiment is applicable to the vibration material disk device of one-way shop powder promptly. The powder outlet 21 of the powder box 2 is arranged at the lowest part, and then the powder in the powder box 2 can flow out through the powder outlet 21 by self gravity. Of course, the powder box 2 may be provided with a vibration motor, and the powder may be conveyed out of the powder outlet 21 by the vibration of the vibration motor.

As shown in fig. 2 and fig. 3, the powder pouring box 3 of the present embodiment is rotatably connected to the powder box 2, and the powder pouring box 3 can open or close the powder outlet 21 of the powder box 2 by rotating, and can receive the powder flowing out from the powder outlet 21 when the powder outlet 21 of the powder box 2 is opened. Illustratively, the powder container 3 is provided with a powder receiving port 31 and a powder conveying port 32, wherein the powder receiving port 31 is communicated with the powder outlet 21 of the powder box 2 so as to receive the powder flowing out from the powder outlet 21. The powder conveying port 32 is arranged corresponding to the powder paving platform 1, and powder in the powder box 2 sequentially passes through the powder outlet 21, the powder receiving port 31 and the powder conveying port 32 and is guided and conveyed to the powder paving platform 1 by the powder pouring box 3.

In addition, a channel is formed in the powder pouring box 3, the channel is used for the circulation of powder, the top opening of the channel is the powder receiving port 31, and the bottom opening of the channel is the powder conveying port 32. This passageway is the arc structure, and then back in the powder entering passageway, the passageway of arc structure can lead the flow of powder to carry to shop's powder platform 1 on. In this embodiment, as shown in fig. 3, rotating shafts 33 are disposed on two sides of the powder pouring box 3, so that the powder pouring box 3 can be rotatably connected to the powder box 2 through the rotating shafts 33, and when the powder pouring box 3 rotates to a horizontal position (shown in fig. 4), the powder conveying port 32 of the powder pouring box 3 is parallel to the powder spreading platform 1, the powder in the powder box 2 cannot flow to the powder spreading platform 1 through the powder conveying port 32 of the powder pouring box 3, and the powder outlet 21 of the powder box 2 is sealed by the powder pouring box 3. When the powder pouring box 3 rotates to the maximum angle with the horizontal plane (shown in fig. 5), the powder conveying port 32 of the powder pouring box 3 points to the powder laying platform 1, the powder in the powder box 2 can flow to the powder laying platform 1 through the powder pouring box 3, and the powder outlet 21 of the powder box 2 is opened.

In this embodiment, a gear 5 is disposed on one side of the powder pouring box 3, the gear 5 is fixedly connected to one side of the powder pouring box 3 and can drive the powder pouring box 3 to rotate, and the gear 5 can drive the powder pouring box 3 to rotate to a maximum angle with the horizontal plane to open the powder outlet 21. Be equipped with counter weight 7 in the one end that powder box 3 is close to and connect powder mouth 31 of falling, this counter weight 7 can drive powder box 3 of falling through self gravity and rotate, and counter weight 7 drives powder box 3 pivoted direction of falling and gear 5 and drives powder box 3 pivoted opposite direction, and it can make powder box 3 of falling rotate to horizontal position in order to seal out powder mouth 21.

In this embodiment, further, a limiting block 8 may be further disposed at the powder outlet 21 of the powder box 2, and the limiting block 8 is configured to limit the rotation angle of the powder pouring box 3 when the powder pouring box 3 is configured to rotate, so that the powder pouring box 3 is limited at a horizontal position, and the powder outlet 21 is effectively sealed.

As shown in fig. 6, a bracket 41 is fixedly arranged on one side of the scraper 4 of the present embodiment, and a rack 6 is arranged on the bracket 41, and the rack 6 can be meshed with the gear 5 on the powder pouring box 3. When the scraper 4 moves to the first position, the rack 6 is not engaged with the gear 5, and the compact 3 is in a horizontal position under the weight of the counterweight 7. When the scraper 4 moves to the second position, the scraper 4 drives the rack 6 to engage with the gear 5 to drive the gear 5 to rotate, the gear 5 drives the powder pouring box 3 and the counterweight 7 thereon to rotate, so that the powder conveying port 32 of the powder pouring box points to the powder spreading platform 1, the powder outlet 21 of the powder box 2 is opened, and the powder in the powder box 2 can be conveyed to the powder spreading platform 1. It will be appreciated that when the doctor blade 4 is in the second position, the powder delivered to the powder application platform 1 is on the powder application side of the doctor blade 4. In addition, the powder conveying port 32 of the powder pouring box 3 of the present embodiment is located higher than the topmost position of the scraper 4 so as to avoid interference with the movement of the scraper 4.

After the powder is carried to the certain time, scraper 4 then lays this powder, consequently scraper 4 can drive rack 6 and remove to the other end of shop's powder platform 1, scraper 4 drives rack 6 and gear 5 meshing at this moment and rotates in order to drive gear 5, gear 5 then drives the powder box 3 of falling and counter weight 7 antiport on it, when rack 6 and gear 5 separation, the powder box 3 of falling will go out powder mouth 21 and seal, it is in the horizontality to fall powder box 3 under counter weight 7 and stopper 8's effect simultaneously, the powder is no longer carried to shop's powder platform 1 this moment.

In this embodiment, the scraper 4 can be driven by a motor and a chain wheel and a chain to move, and the driving connection mode is a common structure in the prior art, and is not described again. It will be appreciated that the doctor blade 4 may also have other drive means for driving the movement.

The powder laying device of the embodiment lays powder in multiple layers along with the scraper 4, each layer has part of residual powder, when the scraper 4 moves to the second position, the remaining powder can be blocked and gradually accumulated by the powder blocking plate 9, when the build-up is high enough, the powder is able to pass the scraper blade 4 and flow to the powder scraping side of the scraper blade 4, and as more and more powder flows to the powder scraping side of the scraper blade 4, through the natural stopping characteristic of the flowing of the powder, the powder can be accumulated to the degree of blocking the powder conveying opening 32 of the powder pouring box 3, at the moment, the powder conveying opening 32 is blocked, the powder in the powder box 2 can not flow to the powder laying platform 1 through the powder conveying opening 32, thereby avoiding excessive powder accumulation, the scraper 4 can directly lay the accumulated powder at the forming cylinder, thereby realizing the reuse of the redundant powder and not causing more powder piles on the powder laying platform 1.

The above-mentioned powder paving device of this embodiment, it can realize the powder in powder box 2 through the rotation of falling powder box 3 and carry the powder side of scraping to scraper 4, can effectively control the conveying capacity of powder in powder box 2, and the powder volume on every layer of having guaranteed to carry is enough, the too much or too little condition can not appear. But also the laid powder layer can be made uniform.

This embodiment still provides an additive manufacturing device, and it includes above-mentioned shop's powder device, can realize the maximize utilization of powder, ensures that every layer shop's powder is even, has guaranteed the yields of the part of additive manufacturing.

Example two

The present embodiment provides a powder paving device, which is different from the first embodiment in that the powder paving device of the present application can realize bidirectional powder paving. Specifically, as shown in fig. 7 and 8, the number of the powder boxes 2 of the present embodiment is two, two powder boxes 2 are respectively disposed at two ends of the powder laying platform 1, and the powder outlet 21 of each powder box 2 is provided with the powder pouring box 3. The scraper 4 of this embodiment can realize two-way shop's powder action, and when scraper 4 removed to one end, can drive the powder box 3 that falls of this end and rotate the transport that realizes the powder.

Preferably, as shown in fig. 9, the support 41 of the scraper 4 of this embodiment is provided with two racks 6, wherein one rack 6 can engage with the gear 5 on one of the compacts 3, so as to drive the compact 3 to rotate, so as to convey the powder in the powder box 2. The other rack 6 can be meshed with the gear 5 on the other powder pouring box 3 to drive the powder pouring box 3 to rotate to convey powder. More preferably, the two racks 6 of the present embodiment are staggered, so as to ensure that one gear 5 is only meshed with the corresponding gear 5, and the other gear 5 is not affected.

The rest of the structure of the powder spreading device in this embodiment is the same as that in the first embodiment, and is not described again.

The above-mentioned powder paving device of this embodiment, at the beginning, scraper 4 is originally in the primary importance of powder paving platform 1 one end, when receiving the powder feeding instruction, scraper 4 moves to the second place, under the effect of a rack 6 on scraper 4 this moment, make powder box 3 that falls rotate to the position of directional powder paving platform 1, powder in powder box 2 is carried to the powder side of scraping of scraper 4 through falling powder box 3, after a few seconds, scraper 4 moves to the primary importance, scraper 4 drives rack 6 and gear 5 meshing in order to drive gear 5 and rotate, gear 5 then drives the counter weight 7 antiport of falling powder box 3 and above that, when rack 6 and gear 5 separate, it seals powder outlet 21 to fall powder box 3, it is in the horizontality to fall powder box 3 under the effect of counter weight 7 and stopper 8 simultaneously, powder in powder box 2 no longer carries. When receiving the instruction of inverse powder scraping, the scraper 4 lays the powder to the forming cylinder to form the required powder layer, and finally the scraper 4 stays at the first position at the other end of the powder laying platform 1 and accumulates the surplus powder on the non-powder-scraping side of the scraper 4 (note that when the scraper 4 moves from one end of the powder laying platform 1 to the other end, the powder-scraping side and the non-powder-scraping side are interchanged), and then the above processes of powder conveying and powder laying are repeated. When accumulational powder is more, scraper 4 stops when the first position, has the powder to overturn scraper 4 and places in scraping powder side of scraper 4, after reacing the second position, because of the natural rest that the powder flows, will fall the powder mouth 32 shutoff of powder box 3 when the powder piles up to a certain extent, and it no longer has the powder outflow to fall powder box 3 this moment, has guaranteed that the powder can not be more and more. When the powder is conveyed at the same time, the area with less powder can be supplemented through the natural stopping of the flowing of the powder along the direction of the powder conveying opening 32 of the powder pouring box 3, and the uniformity of the powder is ensured.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A powder paving device, comprising:

the powder laying platform (1) is provided with a first position and a second position;

the powder box (2) is arranged above the powder laying platform (1);

the powder pouring box (3) is rotatably connected to the powder box (2), and the powder pouring box (3) can open or close the powder outlet (21) of the powder box (2) through rotation;

the scraper (4) is arranged on the powder laying platform (1) in a sliding mode, and the scraper (4) can drive the powder pouring box (3) to rotate;

scraper (4) by first position slides extremely during the second position, powder outlet (21) is opened in powder box (3) of falling, and will powder in powder box (2) is carried extremely the powder side of scraping of scraper (4), when scraper (4) leave the second position, powder outlet (21) is sealed in powder box (3) of falling.

2. The powder paving device according to claim 1, characterized in that a gear (5) is fixedly arranged on one side of the powder pouring box (3), a rack (6) capable of being meshed with the gear (5) is arranged on the scraper (4), and the rack (6) drives the gear (5) to rotate in the process that the scraper (4) slides from the first position to the second position, so that the powder pouring box (3) opens the powder outlet (21); the scraper (4) slides to the process of the first position from the second position, the gear (5) is driven by the rack (6) to rotate, so that the powder outlet (21) is closed by the powder pouring box (3).

3. A powder spreading device according to claim 2, wherein a counterweight (7) is provided on the compact (3), the counterweight (7) being configured to maintain the compact (3) in a state of closing the powder outlet (21) when the scraper (4) leaves the second position.

4. A powder spreading device according to claim 3, wherein a limit block (8) is arranged on the powder box (2), and the limit block (8) is configured to abut against the powder pouring box (3) when the powder pouring box (3) rotates to a horizontal state.

5. A powder spreading device as claimed in any one of claims 1 to 4, characterized in that the powder spreading device further comprises a powder baffle (9), the powder baffle (9) being located on the non-powder-scraping side of the scraper (4).

6. A powder spreading device as claimed in claim 5, wherein a channel is opened inside the powder pouring box (3), one end of the channel is opened to form a powder receiving port (31), the other end of the channel is opened to form a powder conveying port (32), the powder receiving port (31) is communicated with the powder outlet (21), and the powder conveying port (32) can point to the powder spreading platform (1).

7. A powder spreading device as claimed in any one of claims 2 to 4, wherein two powder boxes (2) are provided, the two powder boxes (2) are respectively arranged at two ends of the powder spreading platform (1), each powder box (2) is rotatably connected with one inverted powder box (3), and the scraper (4) can drive any one inverted powder box (3) to rotate.

8. A powder spreading device according to claim 7, wherein the scraper (4) is provided with two racks (6), one of the racks (6) can be meshed with the gear (5) on one of the toppled powder containers (3), and the other rack (6) can be meshed with the gear (5) on the other toppled powder container (3).

9. A powder spreading device according to claim 1, further comprising side dams (10) arranged on both sides of the powder spreading platform (1).

10. An additive manufacturing apparatus comprising a powder spreading apparatus according to any one of claims 1 to 9.