A bridging device and powder dispensing assembly for a binder jetting 3D printer powder dispenser.

Abstract

This utility model discloses a bridging device and powder dispensing assembly for a binder jetting 3D printer's powder dispensing chamber. The bridging device includes a bridging mounting base, a transmission connecting plate above the mounting base connected to a deflection excitation component, and a first and second vibrating plate below the mounting base. The first and second vibrating plates are respectively positioned on both sides and are used to insert into the powder dispensing chamber. The mounting base also has clearance notches. This bridging device for the binder jetting 3D printer's powder dispensing chamber has a simple structure, is easy to install and use, and the placement of the first and second vibrating plates prevents powder from sticking to the walls of the powder dispensing chamber and forming arches, thus ensuring continuous and stable powder dispensing by the powder dispensing mechanism.

Description

Technical Field

[0001] This utility model relates to the field of 3D printer technology, specifically to a bridging device and powder dispensing assembly for a binder jetting 3D printer. Background Technology

[0002] Before each layer of powder is laid, the required powder needs to be evenly sprinkled onto the powder bed. There is a powder dispensing hopper in front of the powder dispensing mechanism to store a certain amount of powder.

[0003] When the powder has poor flowability, bridging will occur in the powder spraying chamber. This means that the powder no longer flows smoothly and automatically onto the spraying mechanism, but instead stops and cannot make full contact with it. This mainly manifests in two ways: one is that it is similar to sticking to the powder chamber wall, and the other is that at the relatively narrow outlet at the bottom of the powder spraying chamber, the powder forms an arch-like effect.

[0004] When powder bridging occurs in the powder dispensing chamber, the powder cannot make full contact with the powder dispensing mechanism. The powder dispensing mechanism will then run idle without dispensing powder, interrupting the printing process and causing printing failure. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a bridging device and powder dispensing assembly for a binder jetting 3D printer.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A bridge-breaking device for a powder spraying chamber in an adhesive jetting 3D printer includes a bridge-breaking mounting base. A transmission connecting plate is provided above the bridge-breaking mounting base, and the transmission connecting plate is connected to a deflection excitation assembly. A first vibrating plate and a second vibrating plate are provided below the bridge-breaking mounting base. The first vibrating plate and the second vibrating plate are respectively disposed on both sides. Both the first vibrating plate and the second vibrating plate are used to be inserted into the powder spraying chamber. The bridge-breaking mounting base is also provided with a clearance notch.

[0007] The powder spraying chamber bridge breaking device of this binder jetting 3D printer has a simple structure and is easy to install and use. The arrangement of the first and second vibrating plates can prevent the powder in the powder spraying chamber from sticking to the wall and forming arch bridges, thereby ensuring that the powder dispensing mechanism can continuously and stably spray powder.

[0008] The bridge-breaking mounting base can be used to connect and install the transmission connecting plate at its upper position to connect the deflection excitation component. At the same time, the entire device can be installed on the main equipment (3D printer) using the deflection excitation component. The space below it can also be used to install the first and second vibrating plates. The transmission connecting plate plays the role of transmitting vibration and driving the bridge-breaking mounting base to move, thus realizing the vibration and movement of the first and second vibrating plates.

[0009] Furthermore, a connecting piece is provided below the bridge-breaking mounting base. The first vibrating plate and the second vibrating plate are respectively connected to the two sides of the connecting piece. The connecting piece is provided with multiple powder inlet openings, one of which corresponds to the clearance notch, so that powder can be added to the powder spraying chamber after installation.

[0010] Furthermore, the connecting piece, the first vibrating piece, and the second vibrating piece are an integrated structure, and the first vibrating piece and the second vibrating piece are respectively adapted to the shape of the powder spraying bin wall, so that they can better fit close to the bin wall.

[0011] Furthermore, the deflection excitation assembly includes a motor mounting base, on which a reduction eccentric motor is mounted, and the eccentric shaft of the reduction eccentric motor is connected to the transmission connecting plate; the eccentric shaft is arranged horizontally, the transmission connecting plate is arranged vertically, and the motor mounting base is also provided with a mounting position for connection to the main equipment.

[0012] The decelerated eccentric motor drives the eccentric shaft to make eccentric motion, and the axis of the eccentric shaft will form a circular motion trajectory. Thus, driven by the transmission connecting plate, the bridge breaking mounting base and the vibrating plate below it will also make corresponding movements. For the powder spraying bin, the first vibrating plate and the second vibrating plate will move up, down and left and right along its bin wall, which can initiate the movement of powder in the bin and break powder adhesion and powder arching.

[0013] Furthermore, a connecting seat is provided on one side of the upper end of the transmission connecting plate, and the connecting seat is connected to the eccentric shaft through a coupling.

[0014] Furthermore, one deflection excitation component may be arranged on one side, or two may be arranged on both sides.

[0015] A powder dispensing assembly for an adhesive jetting 3D printer employs the aforementioned powder dispensing chamber bridging device. The powder dispensing assembly includes a powder dispensing chamber with an opening at the top. A bridging mounting base is disposed at the opening. A first vibrating plate and a second vibrating plate extend downward along the chamber wall. A dispersing roller is arranged between the first and second vibrating plates inside the powder dispensing chamber. A long strip-shaped powder outlet is located below the powder dispensing chamber, and a powder dispensing roller is disposed at the outlet.

[0016] Furthermore, the lengths of both the first and second vibrating plates are less than the length of the bin wall, and at least one of the first and second vibrating plates is an upper bent vibrating plate.

[0017] Furthermore, an open cover is provided above the powder spraying chamber, and a movement gap for vertical movement is provided between the open cover and the bridge breaking mounting base.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. The adhesive jetting 3D printer powder spraying chamber bridging device has a simple structure, is easy to install and use. The arrangement of the first and second vibrating plates prevents the powder in the powder spraying chamber from sticking to the wall and forming arch bridges, thereby ensuring continuous and stable powder spraying by the powder dispensing mechanism; 2. The bridging mounting base can be used to connect and install the transmission connecting plate at its upper position to connect the deflection excitation component. At the same time, the entire device can be installed on the main body using the deflection excitation component. The space below can also be used to install the first and second vibrating plates. 3. The first and second vibrating plates not only rely on vibration to break up powder arches, but more importantly, they use their periodic movement to reduce powder adhesion to the bin wall and reduce powder accumulation during movement, thus avoiding the formation of powder arches; 4. For the powder dispensing assembly, the first and second vibrating plates are respectively arranged downward along the bin wall in the length direction of the powder dispensing bin. After the bridge breaking device is activated, the first and second vibrating plates can effectively reduce powder adhesion on the bin wall and can move downward to the powder outlet to break up the powder arches formed there, allowing the powder to fall smoothly. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a bridging device for a powder spraying chamber in a 3D adhesive jet printer according to the present invention. Figure 2 This is a front structural schematic diagram of a bridging device for a powder spraying chamber in a 3D adhesive jet printer according to the present invention. Figure 3This is a top view of the bridging device for the powder spraying chamber of an adhesive jetting 3D printer according to the present invention. Figure 4 This is a three-dimensional structural diagram of a powder-dispensing assembly for an adhesive jetting 3D printer according to the present invention. Figure 5 This is a partial exploded structural diagram of the powder dispensing assembly of a binder jetting 3D printer according to the present invention. Figure 6 This is a partial cross-sectional view of the powder dispensing assembly of a binder jetting 3D printer according to the present invention. In the diagram: 1. Bridge breaking mounting base; 2. Transmission connecting plate; 3. First vibrating plate; 4. Second vibrating plate; 5. Connecting plate; 6. Clearance notch; 7. Powder inlet opening; 8. Motor mounting base; 9. Gearbox eccentric motor; 10. Eccentric shaft; 11. Connecting base; 12. Coupling; 13. Powder spraying bin; 14. Powder spraying bin opening; 15. Bin wall; 16. Dispersing roller shaft; 17. Powder spraying roller; 18. Opening cover plate. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Example 1

[0023] like Figures 1-3 As shown, a bridge-breaking device for the powder spraying chamber of an adhesive jetting 3D printer includes a bridge-breaking mounting base 1. A transmission connecting plate 2 is provided above the bridge-breaking mounting base 1, and the transmission connecting plate 2 is connected to a deflection excitation assembly. A first vibrating plate 3 and a second vibrating plate 4 are provided below the bridge-breaking mounting base. The first vibrating plate 3 and the second vibrating plate 4 are respectively arranged on both sides. Both the first vibrating plate 3 and the second vibrating plate 4 are used to be inserted into the powder spraying chamber. The bridge-breaking mounting base 1 is also provided with a clearance notch 6.

[0024] The powder spraying chamber bridge breaking device of this adhesive jetting 3D printer has a simple structure and is easy to install and use. The arrangement of the first vibrating plate 3 and the second vibrating plate 4 can prevent the powder in the powder spraying chamber from sticking to the wall and forming an arch bridge, thereby ensuring that the powder dispensing mechanism continuously and stably sprays powder.

[0025] The bridge-breaking mounting base 1 can be configured to connect and install the transmission connecting plate 2 at its upper position, so as to connect the deflection excitation component. At the same time, the entire device can be mounted on the main equipment (3D printer) using the deflection excitation component. The space below it can also be used to install the first vibrating plate 3 and the second vibrating plate 4. The transmission connecting plate 2 plays the role of transmitting vibration and driving the bridge-breaking mounting base 1 to move, thus realizing the vibration and movement of the first vibrating plate 3 and the second vibrating plate 4.

[0026] The first vibrating plate 3 and the second vibrating plate 4 not only rely on vibration to break up powder arches, but more importantly, they use their periodic movement to reduce powder adhesion to the bin wall and reduce powder accumulation during movement, thus avoiding the formation of powder arches. In addition, the movement of the first vibrating plate 3 and the second vibrating plate 4 can also drive the powder to move, enhance the powder's fluidity, and reduce powder adhesion and accumulation.

[0027] Since the bridge breaking mounting base 1 is installed on the powder spraying chamber, in order not to affect the normal powder feeding of the powder spraying chamber, the clearance notch 6 is provided on the bridge breaking mounting base so as to add powder into the powder spraying chamber.

[0028] Furthermore, a connecting piece 5 is provided below the bridge-breaking mounting base 1. The first vibrating plate 3 and the second vibrating plate 4 are respectively connected to the two sides of the connecting piece 5. The connecting piece 5 is provided with a plurality of powder inlet openings 7, one of which corresponds to the clearance notch.

[0029] The first vibrating plate 3 and the second vibrating plate 4 are connected by the connecting plate 5 and bolts and installed below the bridge breaking mounting base 1. The connecting plate 5 is larger than the bridge breaking mounting base 1 and has some powder inlet openings so that powder can be added to the powder spraying chamber after installation.

[0030] Both the first vibrating plate 3 and the second vibrating plate 4 are thin metal sheets. This arrangement is beneficial for them to be inserted into the powder spraying chamber and arranged close to the chamber wall, which can also reduce the space occupied inside the chamber. On the other hand, the thin sheet structure can generate and transmit vibration effects during the movement, dispersing the powder in contact with it.

[0031] In this embodiment, the connecting piece 5, the first vibrating piece 3, and the second vibrating piece 4 are integrally formed and bent structures. The first vibrating piece 3 and the second vibrating piece 4 are respectively adapted to the shape of the powder spraying bin wall, so that they can better fit close to the bin wall.

[0032] Furthermore, the deflection excitation assembly includes a motor mounting base 8, on which a reduction eccentric motor 9 is provided, and the eccentric shaft 10 of the reduction eccentric motor 9 is connected to the transmission connecting plate 2; the eccentric shaft 10 is arranged horizontally, the transmission connecting plate 2 is arranged vertically, and the motor mounting base 8 is also provided with a mounting position for connection to the main equipment.

[0033] The motor mounting base 8 allows the entire bridge-breaking device to be connected to the main equipment via its mounting position. Simultaneously, the reduction eccentric motor 9 can be installed. When the reduction eccentric motor 9 is started, its eccentric shaft 10 will perform eccentric motion, meaning the axis of the eccentric shaft 10 will form a circular motion trajectory. Driven by the transmission connecting plate 2, the bridge-breaking mounting base 1 and the vibrating plates below it will also move accordingly. For the powder-spreading bin, the first vibrating plate 3 and the second vibrating plate 4 will move up, down, left, and right along its bin wall, thus initiating powder movement within the bin and breaking up powder adhesion and powder arching. Simultaneously, the eccentric shaft 10 generates moving polarization, and these vibrations are also transmitted to the first vibrating plate 3 and the second vibrating plate 4. The amplitude of the periodic movement of the first vibrating plate 3 and the second vibrating plate 4 driven by the eccentric shaft 10 is adapted to the size of the powder-spreading bin, and generally, the movement is not excessively large.

[0034] Furthermore, a connecting seat 11 is bolted to one side of the upper end of the transmission connecting plate 2, and the connecting seat 11 is connected to the eccentric shaft 10 via a coupling 12. The connection seat 11 and the coupling 12 facilitate the connection between the eccentric shaft 10 and the transmission connecting plate 2, reducing the difficulty of direct mating installation. The coupling 12 has a structure with a connecting shaft at one end and a connecting hole at the other end. The connecting shaft is connected to the connecting seat, and the eccentric shaft is fitted into the connecting hole and fixed by a pin connection.

[0035] Furthermore, one deflection excitation component may be arranged on one side, or two may be arranged on both sides.

[0036] In this embodiment, two deflection excitation components are arranged on both sides of the bridge breaking mounting base 1. The synchronous movement of the two reduction eccentric motors 9 can more stably drive the bridge breaking mounting base to perform periodic movement. The shapes of the two motor mounting bases can be different, and the shapes of the two transmission connecting plates 2 can also not be exactly the same.

[0037] Example 2

[0038] This embodiment provides a binder jetting 3D printer powder dispensing assembly and uses the bridge breaking device from Embodiment 1.

[0039] Specifically, such as Figures 4-6 As shown, the powder-spraying assembly includes a powder-spraying chamber 13, with an opening 14 above the powder-spraying chamber 13. The bridge-breaking mounting base 1 is located at the opening 14 of the powder-spraying chamber. The first vibrating plate 3 and the second vibrating plate 4 extend downward along the chamber wall 15 of the powder-spraying chamber 13, respectively. A dispersing roller 16 is arranged inside the powder-spraying chamber 13 between the first vibrating plate 3 and the second vibrating plate 4. A long strip-shaped powder outlet is located below the powder-spraying chamber 13, and a powder-spraying roller 17 is provided at the powder outlet.

[0040] With the above configuration, the first vibrating plate 3 and the second vibrating plate 4 are respectively arranged downward along the wall 15 of the powder spraying chamber 13 in the length direction. After the bridge breaking device is activated, the first vibrating plate 3 and the second vibrating plate 4 can effectively reduce the powder adhesion on the chamber wall and can move downward to the powder outlet to break up the powder arch bridge formed here, allowing the powder to fall smoothly.

[0041] The dispersing roller 16 is equipped with spiral blades, which can disperse and evenly distribute the powder during rotation, allowing it to fall more evenly in stages. The dispersing roller 16 is located between the first vibrating plate 3 and the second vibrating plate 4, and they do not contact each other, so as not to affect various movements. Motors connecting to and driving the dispersing roller 16, as well as motors connecting to and driving the powder-spraying roller, are distributed outside the powder-spraying chamber 13.

[0042] Furthermore, the lengths of the first vibrating plate 3 and the second vibrating plate 4 are both less than the length of the bin wall 15, allowing them to move within the powder-sprinkling bin; at least one of the first vibrating plate 3 and the second vibrating plate 4 is an upper-bent vibrating plate, which helps to form a receiving space between the upper parts of the first vibrating plate 3 and the second vibrating plate 4, so as to prevent the first vibrating plate and the second vibrating plate from touching the dispersing roller shaft during movement.

[0043] Furthermore, an open cover plate 18 is provided above the powder spraying chamber 13, and a movement gap is provided between the open cover plate 18 and the bridge breaking mounting base 1, providing space for the bridge breaking mounting base to move up and down.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A binder jet 3D printer powder spattering bridge breaking device, characterized in that, The device includes a bridge breaking mounting base, a transmission connecting plate on top of the bridge breaking mounting base, the transmission connecting plate being connected to a deflection excitation assembly, a first vibrating plate and a second vibrating plate on the bottom of the bridge breaking mounting base, the first vibrating plate and the second vibrating plate being respectively disposed on both sides, both of which are used to be inserted into the powder spraying chamber, and the bridge breaking mounting base is also provided with a clearance notch.

2. The binder jet 3D printer powder spilling break bridge device according to claim 1, characterized in that, The bridge-breaking mounting base is provided with a connecting piece below it. The first vibrating plate and the second vibrating plate are respectively connected to the two sides of the connecting piece. The connecting piece is provided with multiple powder inlet openings, one of which corresponds to the clearance notch.

3. The binder jet 3D printer powder spilling break bridge device according to claim 2, characterized in that, The connecting piece, the first vibrating piece, and the second vibrating piece are an integrated structure, and the first vibrating piece and the second vibrating piece are respectively adapted to the shape of the wall of the powder spraying bin.

4. The binder jet 3D printer powder spilling break bridge device of claim 1, wherein, The deflection excitation assembly includes a motor mounting base, on which a reduction eccentric motor is mounted, and the eccentric shaft of the reduction eccentric motor is connected to the transmission connecting plate; the eccentric shaft is arranged horizontally, the transmission connecting plate is arranged vertically, and the motor mounting base is also provided with a mounting position for connection to the main equipment.

5. The binder jet 3D printer powder spilling break bridge device of claim 4, wherein, The upper side of the transmission connecting plate is provided with a connecting seat, which is connected to the eccentric shaft through a coupling.

6. The binder jet 3D printer powder spilling break bridge device of claim 1, wherein, The deflection excitation assembly can be arranged in one side or two sides.

7. A binder jet 3D printer powder fall assembly characterized by, The adhesive jetting 3D printer powder spraying chamber bridging device according to any one of claims 1-6 is adopted. The powder dispensing assembly includes a powder spraying chamber, an opening is provided above the powder spraying chamber, a bridging mounting seat is disposed at the opening of the powder spraying chamber, a first vibrating plate and a second vibrating plate are respectively arranged to extend downward along the chamber wall of the powder spraying chamber, a dispersing roller is arranged inside the powder spraying chamber between the first vibrating plate and the second vibrating plate, an elongated powder outlet is provided below the powder spraying chamber, and a powder spraying roller is provided at the powder outlet.

8. The binder jet 3D printer powder fall assembly of claim 7, wherein, The lengths of both the first and second vibrating plates are less than the length of the bin wall, and at least one of the first and second vibrating plates is an upper bent vibrating plate.

9. The binder jet 3D printer powder fall assembly of claim 7, wherein, An open cover is provided above the powder spraying chamber, and there is a movement gap between the open cover and the bridge breaking mounting base.

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