CN212419639U

CN212419639U - Powder paving and feeding device and additive manufacturing equipment

Info

Publication number: CN212419639U
Application number: CN202021532269.1U
Authority: CN
Inventors: 郭超; 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 makes, a spread powder feeding device and vibration material disk makes equipment is disclosed, spread powder feeding device includes: a powder laying platform; the powder box is arranged above the powder laying platform, and a powder outlet is arranged below the powder box; the powder baffle is arranged below the powder outlet and used for opening or closing the powder outlet; the powder receiving box is rotatably arranged on the powder spreading platform and is used for receiving powder in the powder box; the scraper slides and arranges the powder spreading platform in, and the scraper is connected with the touch pin, and the touch pin can move and drive along with the scraper and connect the powder box to rotate, connects the rotational energy of powder box to drive and keeps off the powder board and open the powder outlet. The utility model discloses can form along the more even powder of arranging of scraper length direction in connecing the powder box to eliminate the inhomogeneity along scraper length direction powder that shop's powder in-process produced, guarantee to get the equal relatively fixed of volume of powder at every turn. And the utility model discloses do not set up the sensor, just also avoided leading to the sensor to produce the volatile material because of high temperature, cause the influence to the vibration material disk.

Description

Powder paving and feeding device and additive manufacturing equipment

Technical Field

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

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) in order to make the powder of spreading more accurate, can use the sensor among the present most powder device of spreading, detect the quantity of the powder of spreading and sending through the sensor, there is a large amount of organic matters in the material of current sensor (body and cable), and the organic matter is not the temperature resistant, and easy gassing, has volatile matter when being heated, and these problems are to needs high vacuum, and the higher vibration material disk equipment of shaping temperature can bring not good influence to vibration material disk's result.

2) The powder structure is spreading the powder in-process now, accumulates too much powder on spreading the powder platform easily, the powder condition of spreading the powder platform that overflows appears.

3) The problem that excessive powder overflows a powder spreading platform is solved by a partial powder spreading structure, but the possibility that the powder amount of the powder is uneven along the length direction of the scraper still exists, the thickness of the powder layer is easily inconsistent in a forming area, or the powder is absent in a partial area, so that more structures or operations are needed in each powder spreading process to ensure the uniformity of the layering thickness of the forming area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spread powder feeding device and vibration material disk equipment can avoid the poor condition of vibration material disk effect that the sensor leads to, can prevent moreover that the powder from spilling over and spread the powder platform, and spread the powder more even.

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

a powder paving and feeding apparatus comprising:

a powder laying platform;

the powder box is arranged above the powder spreading platform, and a powder outlet is formed below the powder box;

the powder baffle is arranged below the powder outlet and used for opening or closing the powder outlet;

the powder receiving box is rotatably arranged on the powder laying platform and is used for receiving the powder in the powder box;

the scraper slides and arranges in spread on the powder platform, the scraper is connected with the touch pin, the touch pin can remove and drive along with the scraper connect the powder box to rotate, the rotation that connects the powder box can drive the powder baffle is opened the powder outlet.

Preferably, the powder baffle is arranged below the powder outlet in a sliding manner, and the rotation of the powder receiving box can drive the powder baffle to slide so as to open or close the powder outlet.

Preferably, the powder blocking plate is provided with a through hole, and the through hole can slide along with the powder blocking plate to be aligned with the powder outlet so as to open the powder outlet.

Preferably, the powder collecting box further comprises a rotating block, the rotating block is fixedly arranged in the powder collecting box, and the touch pin can move along with the scraper and abuts against the rotating block, so that the rotating block drives the powder collecting box to rotate.

Preferably, the rotating block is provided with an arc-shaped groove, and the touch pin can be arranged in the arc-shaped groove.

Preferably, the rotating block is provided with a long hole, one end of the powder baffle plate is provided with a connecting shaft, and the connecting shaft is rotatably arranged in the long hole.

Preferably, the number of the rotating blocks is two, and the two rotating blocks are symmetrically arranged in the powder receiving box.

Preferably, the powder receiving box is provided with a bending plate at one end connected with the powder laying platform, the powder laying platform is provided with a bending groove, and the bending plate is arranged in the bending groove and forms a labyrinth structure with the bending groove.

Preferably, the bottom surface of the powder receiving box comprises a first plane section, an inclined plane section and a second plane section which are smoothly connected in sequence, and one end, which is not connected with the inclined plane section, of the second plane section is connected with the powder spreading platform.

The utility model also provides an additive manufacturing equipment, including foretell shop's powder feeding device.

The utility model has the advantages that: move through the scraper drive contact round pin, connect the powder box rotation by the drive of touching round pin, connect the powder box to drive the powder baffle through the rotation of self and open out the powder mouth, powder incasement is followed through going out the powder mouth and is fallen into in connecing the powder box, after connecing the powder box in piling up the powder, the powder of powder incasement no longer flows this moment, the powder stops to flow, can form the more even powder of arranging along scraper length direction in connecing the powder box this moment, and eliminate the inhomogeneous along scraper length direction powder of spreading the powder in-process production, guarantee that the volume of getting the powder at every turn is all relatively more fixed. Because connect the powder box and only drive the drive of touching round pin through the scraper and rotate, need not extra power input and can realize opening and closing the powder outlet. Furthermore, the utility model discloses a spread powder feeding device does not set up the sensor, has just also avoided leading to the sensor to produce the volatile material because of high temperature, causes the influence to the vibration material disk.

Drawings

Fig. 1 is a schematic perspective view of a powder spreading and feeding device provided by the present invention;

FIG. 2 is a schematic view showing a state of the powder box of the powder paving and feeding device according to the present invention when the powder outlet is opened;

FIG. 3 is a schematic view of a powder outlet of a powder box of the powder paving and feeding device provided by the present invention in a closed state;

fig. 4 is an assembly schematic diagram of the scraper and the powder receiving box provided by the present invention.

In the figure:

1. a powder laying platform; 11. bending the groove; 2. powder box; 21. a powder outlet; 22. mounting blocks; 3. a powder baffle plate; 31. a through hole; 32. a connecting shaft; 4. a powder box is connected; 41. bending the plate; 42. a rotating shaft; 5. a scraper; 51. a fixed block; 6. a touch pin; 7. rotating the block; 71. an arc-shaped slot; 72. a long hole; 8. 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.

The utility model provides a spread powder feeding device, it is applied to vibration material disk equipment, can realize the transport of vibration material disk in-process powder and spread the powder, and can not waste the powder. As shown in fig. 1, the powder spreading and feeding device comprises a powder spreading platform 1, a powder box 2, a powder baffle plate 3, a powder receiving box 4 and a scraper 5, wherein the scraper 5 is arranged on the powder spreading platform 1 in a sliding manner, the powder receiving box 4 is arranged on the powder spreading platform 1 in a rotating manner, and powder in the powder receiving box 2 can be received. The powder box 2 is arranged at one end of the powder laying platform 1 and is positioned above the powder receiving box 4. The powder baffle 3 is arranged below the powder box 2, and can open or close the powder outlet 21 of the powder box 2, so that the powder in the powder box 2 can be controlled.

In this embodiment, be provided with side shield 8 along the left and right sides of spreading powder direction at above-mentioned shop powder platform 1, when can avoiding scraper 5 to spread the powder through side shield 8, the powder overflows shop powder platform 1 through the scraper 5 left and right sides. The powder laying platform 1 is provided with a forming cylinder in a matching mode, and the scraper 5 can lay powder to the forming cylinder to form a powder thin layer so as to facilitate subsequent additive manufacturing.

The powder box 2 is arranged above the powder laying platform 1, powder is stored in the powder box, a powder outlet 21 is arranged below the powder box 2, and the powder can fall into the powder receiving box 4 through the powder outlet 21. Preferably, a vibration device can be further arranged on the powder box 2, so that the powder can smoothly flow out of the powder outlet 21 through the vibration of the vibration device, and the powder is prevented from accumulating at the powder outlet 21 and being incapable of flowing out. In this embodiment, above-mentioned powder outlet 21 is rectangle open structure, and it is parallel with the length direction of scraper 5, and then makes the powder can be comparatively even through powder outlet 21 and falls to the powder side of scraping of scraper 5.

In this embodiment, the powder baffle 3 is slidably disposed at the powder outlet 21 of the powder box 2, and can open and close the powder outlet 21. For example, a mounting block 22 may be disposed at the bottom of the powder box 2, and the powder outlet 21 may be disposed on the mounting block 22 in a vertical direction. A sliding groove is formed in the mounting block 22 in a penetrating manner along the horizontal direction, and the powder blocking plate 3 is slidably disposed in the sliding groove. The powder blocking plate 3 is provided with a through hole 31, when the powder blocking plate 3 slides to a preset position, the through hole 31 is just aligned with the powder outlet 21, the powder outlet 21 is opened (shown in fig. 2), and the powder in the powder box 2 can flow out through the powder outlet 21 and the through hole 31 and fall into the powder receiving box 4. When the powder baffle 3 does not slide to the predetermined position, the through holes 31 and the powder outlets 21 are staggered, and at this time, the powder outlets 21 are closed by the positions (shown in fig. 3) on the powder baffle 3 except the through holes 31, so that the powder cannot flow out through the powder outlets 21. It can be understood that the through hole 31 of the present embodiment is adapted to the shape of the powder outlet 21, and is a rectangular opening structure.

In this embodiment, the powder blocking plate 3 slides by the rotation of the powder receiving box 4. That is, a connecting shaft 32 may be disposed at one end of the powder blocking plate 3, the connecting shaft 32 may be rotatably connected to the powder receiving box 4, and when the powder receiving box 4 rotates, the connecting shaft 32 can slide along with the connecting shaft. Illustratively, in the present embodiment, a rotating block 7 is fixed in the powder receiving box 4, an elongated hole 72 is opened in the rotating block 7 along the vertical direction, and the connecting shaft 32 is rotatably disposed in the elongated hole 72. When connecing the powder box 4 to rotate, turning block 7 rotates along with connecing powder box 4 synchronous, and turning block 7 can drive connecting axle 32 horizontal migration through long type hole 72 this moment, just also makes powder baffle 3 horizontal slip, when connecing powder box 4 to rotate to predetermineeing the angle, can drive powder baffle 3 and slide to the aforesaid and predetermine the position, just also makes through-hole 31 just aim at powder outlet 21, and powder outlet 21 is opened. In a similar way, when the powder receiving box 4 rotates reversely by a preset angle, the powder blocking plate 3 can be driven to slide reversely, the through holes 31 and the powder outlets 21 are staggered, and the powder outlets 21 are sealed by the powder blocking plate 3. The structure of the embodiment can realize the sliding of the powder baffle plate 3 by the rotation of the powder receiving box 4 and the arrangement of the long hole 72 of the rotating block 7 and the connecting shaft 32 of the powder baffle plate 3, and does not need to additionally arrange a driving structure to drive the powder baffle plate 3 to slide.

In this embodiment, the two turning blocks 7 can be arranged in two, the two turning blocks 7 are symmetrically fixed in the powder receiving box 4, and the two turning blocks 7 are symmetrically arranged, so that the sliding of the powder blocking plate 3 is more stable.

In this embodiment, the powder receiving box 4 is rotatably disposed on the powder spreading platform 1, so that the powder receiving box 4 has a powder receiving state shown in fig. 2 and a powder to be spread state shown in fig. 3, as shown in fig. 2 and 3, the powder receiving box 4 is connected to the powder spreading platform 1, for example, the powder spreading platform 1 is provided with a mounting hole, the powder receiving box 4 is mounted in the mounting hole, and the powder receiving box 4 is rotatably connected to the powder spreading platform 1 through a rotating shaft 42.

Should connect powder box 4 to be roughly open-ended box structure, be fixed with above-mentioned pivot 42 in connecing powder box 4 outer wall department, set up the shaft hole in the both sides of the mounting hole of shop's powder platform 1 simultaneously, pivot 42 can the pivoted arrange the shaft hole in, realize connecing powder box 4 for shop's powder platform 1 rotation. Preferably, a bearing may be provided between the shaft hole and the rotating shaft 42.

In this embodiment, when the powder receiving box 4 rotates to the powder spreading state shown in fig. 3, one end of the powder receiving box can be connected with the powder spreading platform 1 and is in a horizontal state. Illustratively, as shown in fig. 3, the bottom surface of the powder receiving box 4 comprises a first plane section, a slope section and a second plane section which are smoothly connected in sequence, wherein the first plane section is perpendicular to the side wall of the powder receiving box 4, and one end of the second plane section, which is not connected with the slope section, can be connected to the powder laying platform 1. When receiving powder box 4 and being in the powder state (shown in fig. 2), the second plane section that connects powder box 4 no longer links up and spreads powder platform 1, and is preset angle with the mesa of spreading powder platform 1, and powder baffle 3 is connected powder box 4 and is driven to slide and open powder outlet 21 this moment, and the powder falls into to receiving powder box 4 through powder outlet 21 in, because the second plane section that connects powder box 4 is preset angle with the mesa of spreading powder platform 1, the powder can be received powder box 4 completely and can not fall outside receiving powder box 4. When the powder receiving box 4 is in a state of powder to be spread (shown in fig. 3), the powder blocking plate 3 is driven by the powder receiving box 4 to slide and close the powder outlet 21, the second plane section of the powder receiving box 4 is connected with the powder spreading platform 1, and the second plane section and the table top of the powder spreading platform 1 are in the same horizontal plane.

In this embodiment, preferably, a bending plate 41 is disposed at one end of the second plane section of the powder receiving box 4, which is connected to the powder laying platform 1, the powder laying platform 1 is provided with a bending groove 11 having a U-shaped structure, and when the second plane section is connected to the powder laying platform 1, the bending plate 41 is disposed in the bending groove 11 and forms a labyrinth structure with the bending groove 11. Through the labyrinth-shaped structure that forms, can guarantee that the powder as far as possible overflows through the junction of second plane section and shop's powder platform 1.

As shown in fig. 2-4, the scraper 5 is slidably disposed on the powder spreading platform 1 and can slide into the powder receiving box 4, the scraper 5 is connected with a touch pin 6, the touch pin 6 can move along with the scraper 5 and drive the powder receiving box 4 to rotate, specifically, an arc-shaped groove 71 is formed in the rotating block 7, when the scraper 5 slides into the powder receiving box 4, the touch pin 6 can abut against the arc-shaped groove 71, along with the continuous sliding of the scraper 5, the touch pin 6 can drive the rotating block 7 to drive the powder receiving box 4 to synchronously rotate, when the scraper 5 slides to a position to be scraped with powder, the powder receiving box 4 rotates by a preset angle and is in a powder receiving state, meanwhile, the rotating block 7 drives the powder blocking plate 3 to open the powder outlet 21, the powder falls into the powder receiving box 4, until the powder is filled in the powder receiving box 4, and at this time, the powder does not flow out due to the characteristics of the flowability and the repose angle. Similarly, when scraper 5 reverse slip scrapes the powder, touch round pin 6 breaks away from arc wall 71 gradually, connects powder box 4 to begin the antiport under the drive of self gravity and scraper 5 and front side powder this moment to finally link up with shop's powder platform 1, scraper 5 lays the powder to shaping jar department. In the process, the rotating block 7 drives the powder baffle plate 3 to seal the powder outlet 21, so that the powder in the powder box 2 is prevented from flowing out. Above-mentioned structure, the volume that can guarantee powder case 2 and carry the powder at every turn is fixed, and then has avoided the not enough or waste of powder of carrying.

This embodiment drives turning block 7 and connects powder box 4 to rotate through the touch pin 6 on the scraper 5, connect the rotation of powder box 4 afterwards to drive powder baffle 3 and slide, it is enlarged through the horizontal motion with scraper 5, transmit for powder baffle 3, realize opening and closing of powder baffle 3 to the powder outlet 21 of powder case 2, its structure is ingenious, and the removal that only passes through scraper 5 can realize connecing the rotation of powder box 4 and the slip of powder baffle 3, need not extra power input.

Preferably, fixing blocks 51 are provided at both sides of the scraper 5 in the length direction, and the touch pin 6 is fixedly installed on the fixing blocks 51. Through setting up two fixed blocks 51 for scraper 5 is dumbbell structure, and the homogeneity that the powder flowed along scraper 5 length direction that can be better guaranteed to its symmetrical structure.

It should be noted that, the powder position of waiting to scrape of the above-mentioned scraper 5 of this embodiment is located the one side that is close to the turning block 7 of powder outlet 21, and then when powder outlet 21 was opened, the powder can fall to the powder side of scraping of scraper 5 to can follow the even dropping of scraper 5 length direction, the mobility of powder also can make the powder volume of scraping powder side length direction of scraper 5 even moreover, and then the homogeneity of powder when having guaranteed scraper 5 shop powder.

It is understood that when the scraper 5 finishes spreading powder and slides into the powder receiving box 4, residual powder remains in the powder receiving box 4, and after the powder outlet 21 is opened, the powder in the powder box 2 is stacked on the residual powder in the powder receiving box 4, that is, the conveying amount of the powder is related to the amount of the residual powder. And because the powder receiving box 4 is full of powder and then the scraper 5 spreads the powder, the amount of the powder left each time is consistent, and the conveying amount of the powder is relatively fixed each time.

The utility model also provides an additive manufacturing equipment, it includes foretell shop's powder feeding device. When spreading the powder, at first scraper 5 can carry the surplus powder to move to waiting to scrape the powder position, and in this process, touching round pin 6 promotes turning block 7 and rotates, and turning block 7 drives and connects powder box 4 to rotate preset angle, and turning block 7 drives powder baffle 3 in step and slides and open powder outlet 21, and the powder in powder case 2 connects powder box 4 through powder outlet 21 inflow to finally will connect powder box 4 to fill up, and the powder in powder case 2 is no longer flowed out after filling up and connect powder box 4. At this moment, the powder scraping side of the scraper 5 forms an even powder pile, then the scraper 5 starts to spread powder, namely the scraper 5 drives the powder movement of the powder scraping side, the powder on the powder scraping side is spread at a forming cylinder to form a powder thin layer, the contact pin 6 is separated from the rotating block 7 to rotate in the process, the powder box 4 and the rotating block 7 rotate reversely to a preset angle to return to the original position, and the rotating block 7 synchronously drives the powder blocking plate 3 to slide and close the powder outlet 21. The scraper 5 then moves with the remaining powder to the powder-scraping position and the next powder transport takes place.

The utility model discloses an above-mentioned vibration material disk equipment through above-mentioned powder device of sending that spreads, need not to set up the sensor, has just also avoided leading to the sensor to produce the volatile material because of high temperature, causes the influence to vibration material disk. And the powder uniformity when the doctor blade 5 scrapes the powder can be 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 and feeding apparatus, comprising:

a powder laying platform (1);

the powder box (2) is arranged above the powder laying platform (1), and a powder outlet (21) is arranged below the powder box (2);

the powder blocking plate (3) is arranged below the powder outlet (21), and the powder blocking plate (3) is used for opening or closing the powder outlet (21);

the powder receiving box (4) is rotatably arranged on the powder laying platform (1) and is used for receiving the powder in the powder box (2);

scraper (5), slide and arrange in spread on powder platform (1), scraper (5) are connected with touch pin (6), touch pin (6) can remove and drive along with scraper (5) connect powder box (4) to rotate, the rotation that connects powder box (4) can drive keep off powder board (3) and open go out powder mouth (21).

2. The powder paving and feeding device as claimed in claim 1, wherein the powder baffle plate (3) is slidably disposed below the powder outlet (21), and the rotation of the powder receiving box (4) can drive the powder baffle plate (3) to slide so as to open or close the powder outlet (21).

3. The powder paving and feeding device as claimed in claim 2, wherein the powder baffle (3) is provided with a through hole (31), and the through hole (31) can slide along with the powder baffle (3) to be aligned with the powder outlet (21) so as to open the powder outlet (21).

4. The powder paving and feeding device according to any one of claims 1 to 3, further comprising a rotating block (7), wherein the rotating block (7) is fixedly arranged in the powder receiving box (4), and the contact latch (6) can move along with the scraper (5) and abut against the rotating block (7), so that the rotating block (7) drives the powder receiving box (4) to rotate.

5. Powder spreading and feeding device according to claim 4, wherein the rotating block (7) is provided with an arc-shaped groove (71), and the touch pin (6) can be placed in the arc-shaped groove (71).

6. The powder paving and feeding device as claimed in claim 4, wherein the rotating block (7) is provided with a long hole (72), one end of the powder baffle plate (3) is provided with a connecting shaft (32), and the connecting shaft (32) is rotatably arranged in the long hole (72).

7. Powder spreading and feeding device according to claim 6, wherein two rotating blocks (7) are provided, and the two rotating blocks (7) are symmetrically arranged in the powder receiving box (4).

8. The powder paving and feeding device as claimed in any one of claims 1 to 3, wherein a bending plate (41) is arranged at one end of the powder receiving box (4) connected with the powder paving platform (1), the powder paving platform (1) is provided with a bending groove (11), and the bending plate (41) can be arranged in the bending groove (11) and forms a labyrinth-shaped structure with the bending groove (11).

9. Powder spreading and feeding device according to claim 8, wherein the bottom surface of the powder receiving box (4) comprises a first plane section, a slope section and a second plane section which are smoothly connected in sequence, and one end of the second plane section, which is not connected with the slope section, is connected with the powder spreading platform (1).

10. An additive manufacturing apparatus comprising a dusting device according to any of claims 1-9.