CN109570505B - Metal powder feeding device and 3D printer - Google Patents

Abstract

The invention belongs to the technical field of 3D printers, and in particular relates to a metal powder feeding device and a 3D printer. The metal powder feeding device includes a mounting bracket, a material spreading component and a material feeding component, and the material spreading component includes a material spreading plate and a scraper. The board is installed on the mounting bracket, and the scraper is slidably installed on one end of the paving board and forms a paving area together with the paving board. Each feeding component includes a feed bin and a vibration motor, and the vibration motor is installed on the feed bin. One end of the silo is installed on the mounting bracket and is located above one end of the paving board, and the other end of the silo is provided with a discharge port for discharging materials into the material paving area, and an adjusting piece for adjusting the size of the discharge port is installed on the silo , when in use, by adjusting the size of the discharge port, the vibration motor is controlled to start or close, and the amount of metal powder added to the material spreading area can be realized, thereby realizing the purpose of quantitative feeding in the material spreading area , effectively reduce the waste of materials, and improve the accuracy of feeding.

Description

Metal powder feeding device and 3D printer

technical field

The invention belongs to the technical field of 3D printers, in particular to a metal powder feeding device and a 3D printer.

Background technique

3D printing is a hot spot in technology application now. 3D printing is an incremental manufacturing process, which can greatly reduce the waste of raw materials, especially rare materials. 3D printing can also directly print and manufacture features and products that cannot be manufactured by general de-quantitative processing. , such as closed lumens, curved lumen pipes, etc. Compared with printing with plastic materials such as ABS, 3D printing with metal powder is more difficult to supply materials during the printing process due to the particularity of its materials, but its application prospects are also better.

The existing 3D metal printing feeding methods include push type and flip type. Among them, the push type uses the scraper to directly push the placed metal powder raw material, so that the metal powder raw material turns over the scraper to the feeding front of the scraper, and then Carry out laying and printing; the flipping type is to provide the metal powder raw material to a turning mechanism, after quantification, turn it over and transport it to the front of the scraper for laying and printing. However, the feeding methods of these two methods are often prone to problems such as waste of metal powder raw materials, inaccurate feeding, and low efficiency.

Contents of the invention

The object of the present invention is to provide a metal powder feeding device and a 3D printer, aiming to solve the technical problems of easy waste of material and inaccurate feeding when the 3D printer in the prior art uses metal powder to print.

In order to achieve the above object, the technical solution adopted by the present invention is: a metal powder feeding device, including a mounting bracket, a material laying assembly for printing and laying materials, and at least one material supply assembly, the material laying assembly includes a material laying plate and a scraper, the laying board is installed on the mounting bracket, the scraper is slidably mounted on one end of the laying board and is co-enclosed with the laying board to form a laying area, each of the feeding components Each includes a silo and a vibration motor, the vibration motor is installed on the silo, one end of the silo is installed on the mounting bracket and is located above one end of the material spreading board, the other end of the silo One end is provided with a discharge opening for discharging material into the material laying area, and an adjusting member for adjusting the size of the discharge opening is installed on the feed bin.

Preferably, the silo includes a storage silo body and a feeding silo body, the upper end of the storage silo body is installed on the mounting bracket, and the discharge port is arranged at the lower end of the storage silo body, so The adjustment member is installed on the storage bin close to the outlet, the upper end of the feeding bin is connected to the lower end of the storage bin and communicated with the outlet, the feeding bin The lower end of the body is inclined and extends towards the material spreading area, and the vibration motor is installed on the storage bin body.

Preferably, the storage bin body includes a primary cavity and a secondary cavity, the upper end of the primary cavity is installed on the mounting bracket, and the periphery of the lower end of the primary cavity is provided with a second A necking portion, the upper end of the secondary cavity is connected to the first necking portion, the periphery of the lower end of the secondary cavity is provided with a second necking portion, the upper end of the feeding bin body Connected to the second necking part, the lower end of the feeding bin extends obliquely downward toward the middle of the paving board, the adjustment member is installed on the second necking part, the The vibration motor is mounted on the first constriction.

Preferably, the silo further includes a transition silo body, the transition silo body is connected between the second shrinkage portion and the feeding silo body, and the adjusting member is installed on the transition silo body.

Preferably, the adjusting member includes a clamping plate, and an insertion slot is opened on one side of the transition chamber body, and the clamping plate is inserted into the insertion slot and extends into the interior of the transition chamber body.

Preferably, the adjustment member also includes a push-pull frame, and two push-pull slots are opened on the transition chamber body, and the two push-pull slots are respectively located on both sides of the insertion slot, and the push-pull frame includes a push-pull frame. A rod and a pull rod connected to both sides of the push rod, the ends of the two pull rods respectively pass through the two push-pull slots and are connected to the clamping plate.

Preferably, the adjustment member further includes at least one limit pin, each of the limit pins includes a first limit post, a second limit post and a connecting post, and the first limit post is fixedly installed on the On the other side of the transition chamber body, one end of the connecting column is connected to the first limiting column, and the other end extends in a direction away from the first limiting column and passes through the push rod. The second limiting post is connected to the end of the connecting post, and the push rod is slidably connected to the connecting post.

Preferably, powder baffles are respectively provided on both sides of the material spreading board, and the two ends of the scraper are respectively slidably mounted on the two powder baffles, and the material spreading board, the scraper and the two The powder baffles are arranged together to form the material spreading area.

Preferably, both ends of the scraper are provided with inverted "U"-shaped sliders, and sliding grooves are provided on both sides of the two powder baffles on the material spreading plate, and the lower part of the material spreading plate There are two guide rails on the end surface, the two guide rails are respectively located under the two powder baffles and extend in the same direction as the powder baffles, and the upper ends of the two inverted "U"-shaped sliders are respectively socketed On the two powder baffles, the lower ends of the two inverted "U"-shaped sliders respectively pass through the sliding grooves and are slidingly connected with the two guide rails; the metal powder feeding device also includes a driving mechanism , the drive mechanism includes a drive motor, a synchronous belt, a first synchronous wheel and a second synchronous wheel, at least one of the inverted "U"-shaped sliders is provided with a fixed clip, and the drive motor is installed on the paving material On the board and close to one end of the guide rail, the second synchronous wheel is fixedly connected to the main shaft of the drive motor, and the first synchronous wheel is installed on the paving board and close to the other end of the guide rail , the synchronous belt is wound and engaged between the first synchronous wheel and the second synchronous wheel, and the fixed clip is fixedly connected with the synchronous belt.

Beneficial effects of the present invention: when the metal powder feeding device of the present invention is used, the metal powder is added into the silo, and the size of the outlet is adjusted by the adjusting member, so that the metal powder in the silo forms a The frictional damping is exactly balanced with its own gravity, that is, the metal powder remains in a static state in the silo without falling; then, when it is necessary to discharge the material into the material laying area for 3D printing, start the vibration motor to make the silo A certain range of vibration occurs, and the metal powder will change the balance state due to the vibration and start to flow out from the discharge port; when it is necessary to stop discharging into the material spreading area, just turn off the vibration motor, the material bin stops vibrating, and the metal powder The material powder is restored to a balanced state and no longer flows out. In this way, the purpose of quantitative feeding to the material spreading area is realized by starting the working time of the vibration motor, effectively reducing the waste of materials and improving the accuracy of feeding. sex. Moreover, the metal powder placed in the silo can be selected according to the actual printing needs, such as stainless steel powder, tungsten steel powder or titanium powder, etc., because the frictional damping between different metal powders is different, so after the material is finished When discharging in the area, the vibration amplitude of the vibration motor and the size of the discharge port can be adjusted to achieve the purpose of quantitative feeding for different materials, which has excellent market application prospects.

Another technical solution adopted by the present invention is: a 3D printer, including a powder receiving device for receiving metal powder in the laying area and the above-mentioned metal powder feeding device, and the powder receiving device is installed on the mounting bracket on and below the decking board.

The 3D printer of the present invention uses the above-mentioned metal powder feeding device. When printing, by controlling the vibration time of the vibrating motor, it can accurately supply the amount of metal powder required in the material laying area, and then the scraper scrapes the metal powder The powder is pushed to the powder outlet, so that the metal powder enters the powder receiving device for printing, which not only improves the accuracy of model printing, but also saves metal materials, and has excellent market application prospects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only the present invention For some embodiments of the invention, those skilled in the art can also obtain other drawings according to these drawings without paying creative efforts.

Fig. 1 is a schematic structural view of a metal powder feeding device provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the explosive structure of the metal powder feeding device provided by the embodiment of the present invention;

Fig. 3 is a second schematic diagram of the explosive structure of the metal powder feeding device provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of the silo of the metal powder feeding device provided by the embodiment of the present invention;

Fig. 5 is a schematic cross-sectional structural view of the silo of the metal powder feeding device provided by the embodiment of the present invention;

Fig. 6 is a schematic structural view of the outlet of the metal powder feeding device provided by the embodiment of the present invention.

Wherein, each reference sign in the figure:

10—Installation bracket 20—Paving component 21—Paving board

22—scraper 23—spreading area 24—powder baffle

30—feeding assembly 31—storage bin 32—vibration motor

33—Regulator 34—Outlet 40—Drive mechanism

41—drive motor 42—synchronous belt 43—fixed clip block

221—inverted "U" type slider 311—storage bin body 312—feed bin body

313—transition chamber body 331—card plate 332—push-pull frame

333—Limiting bolt 3111—First-level cavity 3112—Second-level cavity

3131—fixing hole 3321—push rod 3322—pull rod

3331—the first limit column 3332—the second limit column 3333—connecting column

31111—the first necking portion 31121—the second necking portion.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to FIGS. 1 to 6 are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figures 1 to 6, an embodiment of the present invention provides a metal powder feeding device, including a mounting bracket 10, a laying assembly 20 for printing laying materials, and at least one feeding assembly 30, the laying assembly 20 includes a paving board 21 and a scraper 22, the paving board 21 is mounted on the mounting bracket 10, the scraper 22 is slidably installed on one end of the paving board 21 and surrounds it together with the paving board 21 Set to form material paving area 23, each described feeding assembly 30 all comprises feed bin 31 and vibration motor 32, and described vibration motor 32 is installed on the described feed bin 31, and one end of described feed bin 31 is installed on the installation On the support 10 and above one end of the material spreading plate 21, the other end of the material bin 31 is provided with a discharge port 34 for discharging material in the material spreading area 23, and the material bin 31 is equipped with An adjustment member 33 for adjusting the size of the discharge opening 34 .

Specifically, when using the metal powder feeding device of the embodiment of the present invention, the metal powder is added into the silo 31, and the size of the discharge port 34 is adjusted through the adjustment member, so that the metal powder in the silo 31 The frictional damping formed between is just in balance with its own gravity, that is, the metal powder remains in a static state in the silo 31 and does not fall; then, when it is necessary to discharge the material into the material laying area 23 for 3D printing, start the vibration motor 32, so that the feed bin 31 vibrates to a certain extent. At this time, the metal powder will change the equilibrium state due to the vibration and start to flow out from the discharge port 34; The motor 32 and the feed bin 31 stop vibrating, and the metal powder recovers to be in a balanced state and no longer flows out. In this way, the purpose of quantitative feeding in the material spreading area 23 is realized by starting the vibration motor 32 working hours, effectively Minimize the waste of materials and improve the accuracy of feeding. Moreover, when the metal material powder placed in the material bin 31 can be selected according to the actual printing needs, such as stainless steel powder, tungsten steel powder or titanium powder, etc., wherein the frictional damping between different metal material powders is different, so when the material powder is completely When discharging materials in the material spreading area 23, the vibration amplitude of the vibrating motor 32 and the size of the discharge port 34 can be adjusted to achieve the purpose of quantitative feeding for different materials, which has excellent market application. prospect.

Further, the number of the feed bins 31 is two, and the two feed bins 31 are respectively located above the two ends of the laying board 21 . Specifically, the two feed bins 31 are respectively installed at the left and right ends of the material spreading area 23, so that before feeding to the material spreading area 23, the scraper 22 moves to the left limit position of the material spreading area 23, so that the scraper 22 is located at one of the feed bin 31 (as the feed bin 31 at the left end) the rear of the discharge port 34, after the feed bin 31 at the left end has finished putting a material in the material spreading area 23 like this, the scraper 22 moves toward the right on the material spreading area 23, and the The material powder in the material spreading area 23 is spread and printed, that is, one layer of printing is completed; when the scraper 22 moves to the limit position on the right end of the material spreading area 23, the material bin 31 located at the right end spreads the material in the material spreading area 23, When the material bin 31 at the right end has finished placing the materials in the material spreading area 23 once, the scraper 22 moves toward the left on the material spreading area 23, and the material powder in the material spreading area 23 is spread and printed, that is, another layer of printing is completed ; Repeating in this way, the printing efficiency is doubled, and the use effect is good.

Furthermore, there are two feeding windows on the mounting bracket 10 for adding metal powder into the two storage bins 31 . Specifically, by setting the charging window above the two feed bins 31 on the mounting bracket 10, wherein the charging window is set to be movable and open, that is, one end of the charging window can be hinged on the mounting bracket 10, so that the operator can Check the metal material powder balance of the material bin 31 through the feeding window at any time, so as to add metal material powder to the material bin 31 in time, and ensure that the material bin 31 can continue to feed into the material laying area 23 during the printing process.

In this embodiment, as shown in Figures 2 to 5, the silo 31 includes a storage silo body 311 and a feeding silo body 312, the upper end of the storage silo body 311 is installed on the mounting bracket 10, the The discharge port 34 is located at the lower end of the storage bin body 311, the adjusting member 33 is installed on the storage bin body 311 near the discharge port 34, and the upper end of the feeding bin body 312 is in contact with the storage bin body 311. The lower end of the storage bin body 311 is connected to and communicated with the discharge port 34, the lower end of the feeding bin body 312 is inclined toward the material spreading area 23, and the vibrating motor 32 is installed on the storage bin. On the bin body 311. Specifically, the metal material powder is stored in the storage bin body 311, and the feeding bin body 312 is installed between the storage bin body 311 and the material spreading area 23 in an oblique shape, and both ends of the feeding bin body 312 are open, When the vibration motor 32 was started, the storage bin body 311 began to vibrate, and the metal powder flowed out from the discharge port 34, and the feeding bin body 312 was guided by the metal powder that flowed out from the discharge port 34 on the storage bin body 311. to the top of the material spreading area 23, and then fall into the material spreading area 23. After the metal material powder falls into the specified amount in the material spreading area 23, the scraper 22 starts to move back and forth in the material spreading area 23, and the metal material powder Perform pavement printing.

In this embodiment, as shown in Figures 4-5, the storage bin 311 includes a primary cavity 3111 and a secondary cavity 3112, and the upper end of the primary cavity 3111 is installed on the mounting bracket 10 , the periphery of the lower end of the primary cavity 3111 is provided with a first constriction 31111, the upper end of the secondary cavity 3112 is connected to the first constriction 31111, and the secondary cavity 3112 The periphery of the lower end is provided with a second shrinkage portion 31121, the upper end of the feeding bin body 312 is connected to the second necking portion 31121, and the lower end of the feeding bin body 312 faces the middle of the material-laying board 21 The direction extends obliquely downward, the adjustment member 33 is installed on the second necking portion 31121 , and the vibration motor 32 is installed on the first necking portion 31111 . Specifically, both the primary cavity 3111 and the secondary cavity 3112 are in a square shape, and the cross-sectional area of the primary cavity 3111 is larger than the cross-sectional area of the secondary cavity 3112, wherein the first cavity below the primary cavity 3111 A constriction part 31111 is composed of four slanted plates, and the lower ends of the four slanted plates all extend obliquely downward towards the middle direction of the primary cavity 3111, shrinking the lower part of the primary cavity 3111 to be in line with the secondary cavity. The upper end of 3112 has an opening with the same size, and the upper end of the secondary cavity 3112 is connected to the lower ends of the four slanting plates; similarly, the lower end of the secondary cavity 3112 is also inclined towards the middle direction through two slanting plates. Extending downward, shrinking the lower end of the secondary cavity 3112 into a discharge port 34 . In this way, when the metal material powder is placed in the primary cavity 3111 and the secondary cavity 3112, the slope on the first necking portion 31111 and the slope on the second necking portion 31121 play a certain blocking effect twice , so that the friction damping between the metal powder can balance its own gravity, so that when the vibration motor 32 installed on the first necking part 31111 vibrates, the metal powder flows out from the discharge port 34 and stops the vibration , the metal powder does not flow out.

In this embodiment, as shown in Figures 4-6, the feed bin 31 further includes a transition bin body 313, and the transition bin body 313 is connected between the second shrinkage portion 31121 and the feeding bin body 312 , the adjusting member 33 is installed on the transition chamber body 313 . Specifically, the transition bin body 313 is used to convey the metal material powder flowing out of the second constriction portion 31121 into the feeding bin body 312, and by installing the adjustment member 33 on the transition bin body 313, the adjustment member 33 has sufficient The installation position is to adjust the size of the discharge port 34, so that the metal powder can be accurately discharged through the vibration of the vibration motor 32 in the feed bin 31, and the use effect is good.

In this embodiment, as shown in Figures 4 to 6, the adjustment member 33 includes a clamping plate 331, and one side of the transition chamber body 313 is provided with an insertion slot, and the clamping plate 331 is inserted into the insertion slot. The slot extends into the interior of the transition chamber body 313 . Specifically, the inside of the transition bin body 313 is a flat strip-shaped cavity, and the clip 331 is vertically inserted into the inside of the transition bin body 313 from one side of the transition bin body 313, so that the clip 331 can be adjusted to Insert the depth in the transition bin body 313 to adjust the size of the discharge port 34, so that when different metal powders are placed in the silo 31, the size of the discharge port 34 can be adjusted by the clamp 331 to make it vibrate The motor 32 maintains a balanced state when not vibrating.

In this embodiment, as shown in Figures 4-6, the adjustment member 33 also includes a push-pull frame 332, and two push-pull slots are opened on the transition chamber body 313, and the two push-pull slots are respectively located on the On both sides of the insertion slot, the push-pull frame 332 includes a push rod 3321 and a pull rod 3322 connected to both sides of the push rod 3321. The ends of the two pull rods 3322 respectively pass through the two push-pull slots and are connected to the The card board 331 is connected. Specifically, by setting a push-pull frame 332 on the other side of the transition bin body 313, wherein the pull rods 3322 on both sides of the push rod 3321 can move back and forth in the two push-pull grooves, so that the clamping plate 331 connected to the pull rod 3322 The size of the discharge port 34 can be adjusted by pushing and pulling the push rod 3321 so that the clamping plate 331 is inserted into the depth of the transition chamber body 313, which is convenient to use; further, on one or both sides of the transition chamber body 313 There is also a fixing hole 3131 on the top, and the fixing hole 3131 is connected with the push-pull groove, so that when the size of the corresponding discharge port 34 is adjusted according to the different metal powders placed in the silo 31, it is possible to pass the fastener (such as screws) are screwed in from the fixing hole 3131, so that the fastener and the pull rod 3322 resist, so that the fixed pull rod 3322 no longer moves in the push-pull groove, ensuring that the discharge port 34 no longer changes under the vibration of the vibration motor 32, Therefore, when the vibrating motor 32 stops vibrating, a balanced state can be maintained between the metal powder and the silo 31 , thereby ensuring that the discharge port 34 can realize an accurate feeding amount.

In this embodiment, as shown in FIGS. 4-6 , the adjustment member 33 further includes at least one limit pin 333, each of the limit pins 333 includes a first limit post 3331, a second limit post 3332 and A connecting column 3333, the first limiting column 3331 is fixedly installed on the other side of the transition chamber body 313, one end of the connecting column 3333 is connected to the first limiting column 3331, and the other end faces away from The direction of the first limiting column 3331 extends through the push rod 3321, the second limiting column 3332 is connected to the end of the connecting column 3333, and the pushing rod 3321 is slidably connected to the connecting column 3333 on. Specifically, by setting the limit bolt 333 on the other side of the transition chamber body 313 opposite to the clamping plate 331, each connecting column 3333 passes through the push rod 3321, and the two ends of the connecting column 3333 are respectively provided with a second stopper for stopping. A limit post 3331 and a second limit post 3332, so that the push rod 3321 can only move back and forth in the length direction of the connecting post 3333, that is, the moving stroke of the push rod 3321 is equal to the length of the connecting post 3333, so that it can prevent When moving 332, the clamping plate 331 is driven to completely seal the discharge port 34, or the clamping plate 331 is driven to break away from the insertion slot.

In this embodiment, as shown in Figures 2 to 3, powder baffles 24 are respectively provided on both sides of the material spreading plate 21, and the two ends of the scraper 22 are respectively slidably mounted on the two powder baffles 24. The material spreading area 23 is formed by surrounding the material spreading plate 21 , the scraper 22 and the two powder baffles 24 together. Specifically, by setting powder baffles 24 on both sides of the material spreading plate 21, the two ends of the scraper 22 are vertically nested between the two powder baffles 24, and the scraper 22 can move back and forth on the powder baffles 24. Move, so that the two powder baffles 24 can not only effectively prevent the metal material powder on the material spreading plate 21 from overflowing to both sides during the process of spreading and printing through the scraper 22, but cause the determined supply to be reduced and affect the printing effect and can make the scraper 22 move back and forth more smoothly on the material spreading area 23 .

In this embodiment, as shown in Figures 2 to 3, both ends of the scraper 22 are provided with inverted "U"-shaped sliders 221, and the material spreading plate 21 is located at the two ends of the two powder baffle plates 24. Sliding grooves are respectively opened on the sides, and two guide rails are provided on the lower end surface of the material spreading plate 21, and the two guide rails are respectively located below the two powder baffle plates 24 and extend in the same direction as the powder baffle plates 24. , the upper ends of the two inverted "U"-shaped sliders 221 are respectively sleeved on the upper and lower ends of the two powder baffle plates 24, respectively pass through the sliding grooves and are slidingly connected with the two guide rails; the metal powder The feeding device also includes a drive motor 41, a synchronous belt 42, a first synchronous wheel and a second synchronous wheel, at least one of the inverted "U"-shaped sliders 221 is provided with a fixed clip 43, and the drive motor 41 is installed on On the said paving board 21 and close to one end of the guide rail, the second synchronous wheel is fixedly connected with the main shaft of the drive motor 41, and the first synchronous wheel is installed on the said paving board 21 and close to At the other end of the guide rail, the synchronous belt 42 is wound and engaged between the first synchronous wheel and the second synchronous wheel, and the fixed clip 43 is fixedly connected with the synchronous belt 42 . Specifically, the two ends of the scraper 22 are respectively provided with an inverted "U"-shaped slider 221, wherein the upper end of the inverted "U"-shaped slider 221 is sleeved on the upper end of the powder baffle plate 24, and the lower end is slidably connected with the guide rail, and the timing belt 42 It is wound on the first synchronous wheel, the fixed clamp block 43 and the second synchronous wheel, so that when the driving motor 41 starts, the fixed clamp block 43 drives the inverted "U" type slider 221 to move between the first synchronous wheel and the second synchronous wheel. Move back and forth between, that is to drive the scraper 22 to move back and forth on the two powder baffle plates 24.

Wherein, the fixed clamping block includes a fixed plate body and an engaging block body, and the engaging block body is provided with engaging teeth engaged with the synchronous belt 42, and the fixed plate body is located above the engaging block body, so that when the synchronous belt 42 and the engaging block body After meshing, the timing belt 42 is clamped between the fixing plate and the engaging block through the fixing of the fixing plate, so that the fixing clip can move back and forth driven by the timing belt 42 without making the synchronization Relative slippage occurs between the belt 42 and the fixed jaws.

The embodiment of the present invention also provides a 3D printer, including a powder receiving device for receiving metal powder in the laying area 23 and the above-mentioned metal powder feeding device, and the powder receiving device is installed on the mounting bracket 10 And it is located below the paving board 21 .

The 3D printer of the embodiment of the present invention, owing to use above-mentioned metal powder feeding device, when printing, by controlling the vibrating time of vibrating motor 32, can accurately supply the amount that needs metal powder in material laying area 23, and then scraper 22 Push these metal powders to the powder outlet, so that the metal powder enters the powder receiving device for printing, which not only improves the accuracy of model printing, but also saves metal materials, and has excellent market application prospects.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A metal powder feeding device, characterized in that: the automatic feeding device comprises a mounting bracket, a spreading component and at least one feeding component, wherein the spreading component is used for printing spreading, the spreading component comprises a spreading plate and a scraper, the spreading plate is mounted on the mounting bracket, the scraper is slidably mounted at one end of the spreading plate and is surrounded with the spreading plate together to form a spreading area, each feeding component comprises a storage bin and a vibrating motor, the vibrating motor is mounted on the storage bin, one end of the storage bin is mounted on the mounting bracket and is positioned above one end of the spreading plate, the other end of the storage bin is provided with a discharge hole for discharging materials in the spreading area, and an adjusting piece for adjusting the size of the discharge hole is mounted on the storage bin;

when the metal powder feeding device is used, metal powder is added into the bin, the size of the discharge hole is adjusted through the adjusting piece, so that friction damping formed between the metal powder in the bin is balanced with self gravity, the metal powder is kept in a static state in the bin and does not fall, when 3D printing is carried out by discharging in the spreading area, the vibrating motor is started, the bin is enabled to vibrate by a certain amplitude, the balance state of the metal powder is changed due to vibration, and the metal powder starts to flow out from the discharge hole.

2. The metal powder feeding device according to claim 1, wherein: the feed bin comprises a storage bin body and a feeding bin body, wherein the upper end of the storage bin body is installed on the installation support, the discharge hole is formed in the lower end of the storage bin body, the adjusting piece is installed on the storage bin body and is close to the discharge hole, the upper end of the feeding bin body is connected with the lower end of the storage bin body and is communicated with the discharge hole, the lower end of the feeding bin body is inclined towards the spreading area, and the vibrating motor is installed on the storage bin body.

3. The metal powder feeding device according to claim 2, wherein: the storage bin body comprises a first-level cavity and a second-level cavity, the upper end of the first-level cavity is installed on the installation support, a first shrinkage part is arranged on the periphery of the lower end of the first-level cavity in a surrounding mode, the upper end of the second-level cavity is connected to the first shrinkage part, a second shrinkage part is arranged on the periphery of the lower end of the second-level cavity in a surrounding mode, the upper end of the feeding bin body is connected to the second shrinkage part, the lower end of the feeding bin body faces the direction in the middle of the spreading plate and extends downwards in an inclined mode, the adjusting part is installed on the second shrinkage part, and the vibrating motor is installed on the first shrinkage part.

4. A metal powder feeding device according to claim 3, wherein: the feed bin further comprises a transition bin body, the transition bin body is connected between the second shrinkage part and the feeding bin body, and the adjusting piece is installed on the transition bin body.

5. The metal powder feeding device of claim 4, wherein: the adjusting piece comprises a clamping plate, a splicing groove is formed in one side of the transition bin body, and the clamping plate is inserted into the splicing groove and extends into the transition bin body.

6. The metal powder feeding device of claim 5, wherein: the adjusting piece further comprises a push-pull frame, two push-pull grooves are further formed in the transition bin body, the two push-pull grooves are respectively located on two sides of the inserting groove, the push-pull frame comprises a push rod and pull rods connected to two sides of the push rod, and the tail ends of the two pull rods respectively penetrate through the two push-pull grooves and are connected with the clamping plate.

7. The metal powder feeding device of claim 6, wherein: the regulating part further comprises at least one limiting bolt, each limiting bolt comprises a first limiting column, a second limiting column and a connecting column, the first limiting column is fixedly arranged on the other side of the transition bin body, one end of the connecting column is connected to the first limiting column, the other end of the connecting column extends towards the direction deviating from the first limiting column and penetrates through the push rod, the second limiting column is connected with the tail end of the connecting column, and the push rod is slidably connected to the connecting column.

8. The metal powder feeding device according to any one of claims 1 to 7, wherein: the powder blocking plates are respectively arranged on two sides of the spreading plate, two ends of the scraper are respectively and slidably arranged on the two powder blocking plates, and the spreading plate, the scraper and the two powder blocking plates are jointly enclosed to form the spreading area.

9. The metal powder feeding device of claim 8, wherein: the two ends of the scraper are provided with inverted U-shaped sliding blocks, sliding grooves are respectively formed in two sides of the two powder baffle plates on the spreading plate, two guide rails are arranged on the lower end face of the spreading plate, the two guide rails are respectively positioned below the two powder baffle plates and extend in the same direction as the powder baffle plates, the upper ends of the two inverted U-shaped sliding blocks are respectively sleeved on the two powder baffle plates, and the lower ends of the two inverted U-shaped sliding blocks respectively pass through the sliding grooves and are in sliding connection with the two guide rails;

the metal powder feeding device further comprises a driving mechanism, the driving mechanism comprises a driving motor, a synchronous belt, a first synchronous wheel and a second synchronous wheel, at least one inverted U-shaped sliding block is provided with a fixed clamping block, the driving motor is mounted on the material spreading plate and is close to one end of the guide rail, the second synchronous wheel is fixedly connected with a main shaft of the driving motor, the first synchronous wheel is mounted on the material spreading plate and is close to the other end of the guide rail, and the synchronous belt is meshed between the first synchronous wheel and the second synchronous wheel in a winding mode, and the fixed clamping block is fixedly connected with the synchronous belt.

10. A 3D printer, characterized in that: the metal powder feeding device comprises a powder receiving device for receiving metal powder in a spreading area and the metal powder feeding device according to any one of claims 1 to 9, wherein the powder receiving device is arranged on the mounting bracket and is positioned below the spreading plate.