Top cover, 3D printing feeding device and 3D printing equipment

Abstract

According to the top cover, the 3D printing feeding device and the 3D printing equipment, the top cover comprises a cover body and a drying bin, the drying bin is arranged inside or outside the cover body, the drying bin is connected with the cover body, the cover body and the drying bin jointly define an airflow channel, and the airflow channel communicates with the interior of the cover body. Compared with the prior art, the top cover integrates the drying and ventilating functions and can replace an outer cover of the 3D printing feeding device.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and particularly relates to a top cover, a 3D printing feeding device and a 3D printing device. Background Art

[0002] A 3D printing device (also known as a three-dimensional printer or a stereoscopic printer) constructs a three-dimensional object by means of layer-by-layer printing. The 3D printing device includes a print head for extruding printing material and a printing platform for depositing the printing material to form a three-dimensional object. The print head is configured to be movable relative to the printing platform and to extrude the printing material onto the surface of the printing platform while moving. The printing material is deposited and fused layer by layer on the surface of the printing platform to print out a three-dimensional object.

[0003] With the development of 3D printing technology, people's demand for the color or variety of materials of printed objects is also getting higher and higher. How to meet the diverse needs of printed objects has gradually become a research hotspot. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a top cover, a 3D printing feeding device and a 3D printing device, so as to solve the problem that the existing 3D printing feeding device lacks a drying and ventilation function.

[0005] To achieve the purpose of the utility model, the following technical solutions are provided:

[0006] In a first aspect, the utility model provides a top cover for a 3D printing feeding device. The top cover is used to cover a part of the outer periphery of a material tray, and includes a cover body and a drying chamber. Wherein, the drying chamber is arranged inside or outside the cover body, and the drying chamber is connected to the cover body. The cover body and the drying chamber jointly enclose an air flow channel, and the air flow channel communicates with the inside of the cover body.

[0007] In an implementation manner, the cross-section of the cover body is an arc. Along the circumference of the cover body, the cover body includes a first side and a second side that are opposite to each other. The air flow channel extends in an arc along the outer periphery of the cover body. The outlet of the air flow channel is close to the first side, and a blower is placed near the second side.

[0008] In an implementation manner, the air flow channel includes a connected receiving space and a guiding space. The receiving space is located at one end of the guiding space close to the second side. Along the direction from the second side to the first side, the guiding space extends in a flared shape. The receiving space is used to receive the blower.

[0009] In one embodiment, the top cover includes a flow guide plate, which is received in the flow guide space and connected to the cover body. In the circumferential direction of the cover body, the flow guide plate extends from the first side to the second side, and the flow guide plate divides the flow guide space to form at least two flow guide grooves.

[0010] In one embodiment, when the drying chamber is connected to the outside of the cover body, a first ventilation hole is provided in the cover body, and the first ventilation hole communicates with the inside of the cover body and the air flow channel. The first ventilation hole is close to the first side.

[0011] In one embodiment, the number of the flow guide plates is multiple, and multiple flow guide plates converge from the first side to the second side. The number of the first ventilation holes is multiple, and at least one first ventilation hole is provided in each flow guide groove, or each flow guide groove communicates with the first ventilation hole.

[0012] In one embodiment, the fan includes a first air inlet surface and a second air inlet surface opposite to each other. A second ventilation hole is provided in the cover body, and a third ventilation hole is provided in the drying chamber. The second ventilation hole and the third ventilation hole are arranged opposite to each other. The fan is arranged between the second ventilation hole and the third ventilation hole. The first air inlet surface faces the second ventilation hole, and the second air inlet surface faces the third ventilation hole.

[0013] In one embodiment, when the drying chamber is connected to the outside of the cover body, the motor of the fan is close to the third ventilation hole, or when the drying chamber is connected to the inside of the cover body, the motor of the fan is close to the second ventilation hole.

[0014] In one embodiment, the top cover further includes a first switch. When the drying chamber is connected to the inside of the cover body, the first switch is arranged at the second ventilation hole, or when the drying chamber is connected to the outside of the cover body, the first switch is arranged at the third ventilation hole.

[0015] In one embodiment, the connection line between the center point of the first ventilation hole and the axis of the material tray is the first connection line, and the connection line between the center point of the second ventilation hole and the axis of the material tray is the second connection line. In a plane perpendicular to the axis of the material tray, the included angle between the first connection line and the second connection line is 75° - 120°.

[0016] In one embodiment, the top cover includes a ventilation switch. An external ventilation hole is provided in the cover body, and the external ventilation hole communicates with the inside and the outside of the cover body. The ventilation switch is arranged at the external ventilation hole, and the external ventilation hole and the first ventilation hole are on opposite sides of the cover body.

[0017] In one embodiment, the drying chamber is disposed outside the cover body. The drying chamber extends in a necking shape away from the cover body. An air port is formed at one end of the drying chamber away from the cover body. The air port communicates the air flow channel and the drying chamber. A first ventilation hole is formed in the cover body, and the first ventilation hole communicates the interior of the cover body and the air flow channel.

[0018] In one embodiment, the top cover includes a flow guide plate. The flow guide plate is received in the air flow channel and connected to the drying chamber. The flow guide plate extends from one side of the air port towards the cover body and is connected to the cover body. The flow guide plate divides the air flow channel to form at least two flow guide grooves.

[0019] In one embodiment, the number of the flow guide plates is multiple. A plurality of the flow guide plates converge from the cover body towards the air port. The number of the first ventilation holes is multiple, and each flow guide groove communicates with the first ventilation hole.

[0020] In a second aspect, the present utility model provides a 3D printing feeding device. The 3D printing feeding device includes a blower, a housing, and the top cover as described in any one of the embodiments in the first aspect. The housing and the top cover are detachably connected.

[0021] In one embodiment, the blower is received in the drying chamber.

[0022] In one embodiment, the blower is installed outside the housing, and the blower is connected to the side plate of the housing.

[0023] In a third aspect, the present utility model provides a 3D printing device. The 3D printing device includes a 3D printer and the 3D printing feeding device as described in the second aspect.

[0024] The present utility model provides a top cover. The top cover includes a cover body and a drying chamber integrated on the cover body. The drying chamber can be used for air flow to pass through. The air flow flows into the interior of the top cover through the air flow channel, thereby drying the material tray covered by the top cover. Compared with the existing outer cover, this top cover integrates the drying and ventilation functions and can replace the outer cover of the 3D printing feeding device in the prior art, and the material tray can be dried without replacing the whole 3D printing feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 The external view of a 3D printing feeding device of an implementation mode;

[0027] Figure 2 The rear view of a top cover of an implementation mode;

[0028] Figure 3 The sectional view of a top cover of an implementation mode;

[0029] Figure 4 The internal view of an air flow channel at the front of an implementation mode;

[0030] Figure 5 The internal view of an air flow channel at the back of an implementation mode;

[0031] Figure 6 The top view of an air flow channel of an implementation mode;

[0032] Figure 7 The front view of a top cover under external circulation of an implementation mode;

[0033] Figure 8 The external view of a 3D printing feeding device of another implementation mode;

[0034] Figure 9 is Figure 8 The top view of the 3D printing feeding device in

[0035] Figure 10 is Figure 8 The front view of the 3D printing feeding device in

[0036] Figure 11 is Figure 8 The side view of the 3D printing feeding device in

[0037] Figure 12 The external view of a 3D printing feeding device of yet another implementation mode.

[0038] Explanation of reference numerals:

[0039] 100 - 3D printing feeding device;

[0040] 10 - housing, 11 - storage bin;

[0041] 20 - mounting member, 21 - rotating shaft;

[0042] 30 - Top cover, 30A - First side, 30B - Second side, 31 - Cover body, 311 - Main body part, 312 - Outer edge, 313 - First ventilation hole, 314 - Second ventilation hole, 315 - External ventilation hole, 32 - Drying bin, 321 - Enclosing plate, 322 - Top plate, 323 - Third ventilation hole, 324 - Air port, 33 - Fan, 34 - Heating element, 35 - Air flow channel, 351 - Accommodating space, 352 - Diversion space, 3521 - Diversion groove, 36 - Diversion plate, 37 - First switch, 38 - Ventilation switch, P - First connection line, Q - Second connection line. Detailed implementation mode

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the present invention in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0046] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0047] The present invention provides a top cover 30 applicable to a 3D printing feeding device 100. Please refer to Figure 1, a feeding device 100 for 3D printing. Among them, the 3D printing feeding device 100 includes a housing 10, a mounting member 20, and the top cover 30. The housing 10 and the top cover 30 are detachably connected through the mounting member 20. The 3D printing feeding device 100 is used to accommodate the material tray, so the top cover 30 covers a part of the outer periphery of the material tray. In a specific embodiment, multiple material trays can be placed in the 3D printing feeding device 100 provided by the present utility model, and the 3D printing feeding device 100 can selectively output the material on one of the material trays.

[0048] Optionally, the material tray is disc-shaped. The material tray includes a tray body and a linear material (hereinafter referred to as material) wound around the tray body. The material is wound around the tray body in circles. When the material needs to be output, the 3D printing feeding device 100 drives the material tray to rotate so that the tray body rotates to drive the material to be released from the tray body.

[0049] The top cover 30 provided by the present utility model is detachably connected to the housing 10, so the top cover 30 provided by the present utility model can be used as a replaceable accessory of the 3D printing feeding device 100. In the prior art, most 3D printing feeding devices 100 do not have the function of ventilation and heating. If there is a need for ventilation and heating, a new 3D printing feeding device 100 needs to be replaced, resulting in an increase in the cost of 3D printing. Therefore, the present utility model separately provides a top cover 30, which can be used to replace the outer cover of the 3D printing feeding device 100 that does not have the function of ventilation and heating in the prior art. The top cover 30 provided by the present utility model has the function of ventilation and heating, and the cost of 3D printing can be saved by only replacing the top cover 30.

[0050] In one embodiment, the housing 10 encloses a receiving cavity with one end open. The top cover 30 is connected to the opening of the housing 10, and the top cover 30 and the housing 10 are rotatably connected. The top cover 30 is opened so that the opening of the housing 10 is exposed, and the material tray is placed in the receiving cavity through the opening. The top cover 30 is closed so that the receiving cavity is closed, and the material is exported through the perforation on the housing 10.

[0051] In one embodiment, please refer to Figure 1 , the number of the mounting members 20 is two, and the two mounting members 20 are respectively arranged at the opposite ends on the same side of the top cover 30. It can be understood that the top cover 30 and the housing 10 are rotatably connected through a rotating shaft 21, and the mounting member 20 is used to connect to both ends of the rotating shaft 21 to fix the rotating shaft 21; after the mounting member 20 is removed, the top cover 30 or the housing 10 can be separated from the rotating shaft 21.

[0052] In one embodiment, please refer to Figures 2 to 4, the top cover 30 includes a cover body 31, a drying bin 32, a blower 33 and a heating element 34. Among them, the drying bin 32 is arranged inside or outside the cover body 31, and the drying bin 32 is connected to the cover body 31. The cover body 31 and the drying bin 32 jointly enclose an air flow channel 35, and the air flow channel 35 communicates with the inside of the cover body 31; the blower 33 is housed in the drying bin 32.

[0053] In one embodiment, please refer to Figure 3 and Figure 4 , the cover body 31 includes a connected main body portion 311 and an outer edge 312. Among them, the interface shape of the main body portion 311 can be arc-shaped, that is, the cross-sectional contour line of the main body portion 311 is an arc line. In a specific embodiment, the main body portion 311 is semi-cylindrical. It can be understood that since the shape of the material tray is disc-shaped, when the top cover 30 covers the outer periphery of the material tray, the shape of the top cover 30 needs to be adapted to the material tray, and the main body portion 311 is the part of the top cover 30 that is adapted to the material tray. The outer edge 312 is connected to the end surface of the main body portion 311, and the outer edge 312 is a closed-loop ring, and the outer edge 312 protrudes from the outer periphery of the end surface of the main body portion 311; it can be understood that the end surface of the main body portion 311 is the opening edge of the top cover 30 opposite to the outer shell 10. The outer edge 312 is used to be adapted to the end surface of the outer shell 10, and it is also for the convenience of opening or closing the top cover 30 through the outer edge so that the top cover 30 and the outer shell 10 can be adapted after being closed.

[0054] In one embodiment, please refer to Figure 3 , the cover body 31 includes an inside and an outside. It should be explained that the inside of the cover body 31 is the semi-circular space on the side of the top cover 30 facing the material tray, that is, the space enclosed by the main body portion 311; the outside of the cover body 31 is the external space of the top cover 30 (3D printing feeding device 100). The drying bin 32 can be arranged inside or outside the cover body 31. Among them, when the drying bin 32 is arranged outside, it actually means that the drying bin 32 is exposed to the external space, and when the drying bin 32 is arranged inside, it actually means that the drying bin 32 is housed in the space enclosed by the top cover 30 and the outer shell 10.

[0055] In one embodiment, please refer to Figure 2 and Figure 3 , the drying bin 32 is connected to the main body portion 311, and the drying bin 32 includes a surrounding plate 321 and a top plate 322. Among them, the surrounding plate 321 is connected to the main body portion 311, and the top plate 322 is connected to the surrounding plate 321 and is spaced apart from the inner surface (or outer surface) of the main body portion 311. The gap space between the top plate 322 and the surface of the main body portion 311 is the air flow channel 35. The drying bin 32 is used to supply air flow to the inside of the top cover 30.

[0056] In a specific embodiment, when the drying chamber 32 is disposed on the outside, the internal space of the drying chamber 32 and the top cover 30 is separated by the top cover 30. Therefore, when the drying chamber 32 is disposed on the outside, in order to ensure that the air flow provided by the drying chamber can flow into the interior of the top cover 30, it is necessary to provide ventilation holes in the cover body 31 to connect the air flow channels 35 through the ventilation holes. Moreover, in order to ensure the airtightness of the drying chamber 32, the above-mentioned surrounding plate 321 is a circular ring with its ends connected, and the space of the air flow channel 35 is closed by the top plate 322.

[0057] In a specific embodiment, when the drying chamber 32 is disposed on the inside, the drying chamber 32 is in the internal space, and there is no need to limit the airtightness of the drying chamber 32. Therefore, the surrounding plate 321 in the above-mentioned place may not be a circular ring with its ends connected, and there is a gap between the surrounding plates 321, and this gap can be used to discharge the air flow in the air flow channel 35. The top plate 322 can be used to block the components in the material tray and the drying chamber 32.

[0058] In one embodiment, the fan 33 and the heating element 34 together form a heating assembly, and both the fan 33 and the heating element 34 are housed in the drying chamber 32. The fan 33 is used to create an air flow environment in the drying chamber 32, and the heating element 34 is used to heat the gas in the drying chamber 32 so that the air in the drying chamber 32 forms a hot air flow. In a specific implementation, the fan 33 can draw the gas in the receiving cavity into the drying chamber 32 and then discharge it into the receiving cavity through the air flow channel 35, so as to create an internal air flow circulation; in other specific embodiments, the fan 33 can draw external gas into the drying chamber 32 and then discharge it into the receiving cavity through the air flow channel 35. Under the action of the fan, the air pressure in the receiving cavity increases, and then it is discharged through some gaps of the 3D printing feeding device 100, so as to create an external air flow circulation and dry the material. Optionally, in the direction of the air flow in the air flow channel 35, the heating element 34 is located behind the fan 33. In this way, after the fan 33 blows out air, the air flow will flow out through the heating element 34 via the air flow channel 35, improving the heating efficiency.

[0059] The present invention provides a top cover 30, which includes a cover body 31 and a drying chamber 32 integrated on the cover body 31. The fan 33 in the drying chamber 32 can be used for air flow, and the air flow flows into the interior of the top cover 30 through the air flow channel 35, thereby drying the material tray covered by the top cover 30; compared with the existing outer cover, this top cover 30 integrates the functions of drying and ventilation, can replace the outer cover of the 3D printing feeding device 100 in the prior art, and can dry the material tray without replacing the whole 3D printing feeding device 100.

[0060] In one embodiment, please refer to Figure 3, the cross-section of the cover body 31 is circular arc. Along the circumference of the cover body 31, the cover body 31 includes opposite first side 30A and second side 30B. The air flow channel 35 extends in an arc along the outer periphery of the cover body 31. The outlet of the air flow channel 35 is close to the first side 30A, and the fan 33 is close to the second side 30B.

[0061] Specifically, due to the shape of the main body portion 311 of the cover body 31, a part of the cross-section of the cover body 31 is circular arc (mainly the position of the main body portion 311), so the cover body 31 includes a circumferential direction, that is, the direction around the outer periphery of the main body portion 311. At both opposite ends in the circumferential direction of the cover body 31 are the first side 30A and the second side 30B respectively, and the first side 30A and the second side 30B together are used to form part of the outer edge 312 mentioned above. In a specific embodiment, the first side 30A is the connection part between the top cover 30 and the outer shell 10, that is, the rotating shaft 21 and the mounting member 20 mentioned above are installed on the first side 30A, and the second side 30B faces away from the first side 30A, so the second side 30B is the opening of the top cover 30 and the outer shell 10.

[0062] The air flow channel 35 extends in an arc along the circumferential direction of the cover body 31 from a position close to the second side 30B to a position close to the first side 30A. The air outlet of the air flow channel 35 is close to the first side 30A, and the fan 33 is installed at a position close to the second side 30B. In this way, the air blown out by the fan 33 can flow in an arc along the inner surface or the outer surface of the cover body 31. The setting mode of the air flow channel 35 and the fan 33 adapts to the flow characteristics of the air flow. Whether the drying bin 32 is inside or outside, the air flow flows along the cover body 31, so that the flow range of the air flow can be provided, and the turbulence or disordered flow generated during the air flow can also be reduced.

[0063] In one implementation, please refer to Figure 4 , the air flow channel 35 includes a connected receiving space 351 and a guiding space 352. The receiving space 351 is located at one end of the guiding space 352 close to the second side 30B. Along the direction from the second side 30B to the first side 30A, the guiding space 352 extends in a flared shape, and the fan 33 is received in the receiving space 351.

[0064] Specifically, the receiving space 351 and the guiding space 352 are connected, and both the fan 33 and the heating element 34 are arranged in the receiving space 351. In a specific embodiment, the receiving space 351 extends in the circumferential direction of the cover body 31 and is connected to the guiding space 352. The guiding space 352 extends in a flared shape from the connection with the receiving space 351 to the direction of the first side 30A, so the volume of the receiving space 351 is smaller than that of the guiding space 352. One end of the guiding space 352 far from the receiving space 351 is connected to the inside of the top cover 30.

[0065] It is understood that in order to allow the airflow provided by the drying chamber 32 to cover a larger area within the receiving chamber and improve the drying efficiency of multiple trays, it is necessary to diffuse the airflow as much as possible at the outlet of the airflow channel 35 to increase the airflow coverage area. Therefore, the present invention provides a flared extension of the guide space 352, which improves the airflow diffusion effect and covers the largest possible tray.

[0066] In one embodiment, please refer to Figure 4 and Figure 5 The top cover 30 includes a guide plate 36, which is accommodated in the guide space 352 and connected to the cover body 31. In the circumferential direction of the cover body 31, the guide plate 36 extends from the first side 30A to the second side 30B, and the guide plate 36 divides the guide space 352 to form at least two guide grooves 3521.

[0067] Specifically, the guide plate 36 is disposed within the drying chamber 32 and connected to the inner or outer surface of the cover 31. The guide plate 36 is used to guide the airflow in the airflow channel 35, ensuring a fixed airflow direction and uniform airflow distribution. The guide plate 36 extends from the first side 30A to the second side 30B, thereby dividing the outlet of the airflow channel 35 into sub-ports of uniform size, thereby ensuring a uniform amount of airflow from each sub-port. It is understood that the number of guide grooves 3521 that the guide plate 36 divides the guide space 352 into should be n+1, where n is the number of guide plates 36.

[0068] By setting the guide plate 36 in the guide space 352, on the one hand, the shape of the guide space 352 is used to guide and stabilize the airflow, and on the other hand, the airflow is evenly dispersed so that the airflow blown out of the airflow channel 35 can be evenly blown to all parts of the receiving cavity.

[0069] In one embodiment, please refer to Figures 4 to 6 When the drying chamber 32 is connected to the outside of the cover body 31, a first vent hole 313 is opened on the cover body 31, and the first vent hole 313 connects the interior of the cover body 31 and the air flow channel 35. The first vent hole 313 is close to the first side 30A, and the fan 33 is close to the second side 30B.

[0070] Specifically, when the drying chamber 32 is located externally, the airflow it provides must pass through the cover 31 to reach the interior of the top cover 30. Therefore, a first vent 313 is provided on the cover 31. The first vent 313 serves as the outlet of the airflow channel 35. The first vent 313 is located at the end of the airflow channel 35, that is, near the first side 30A.

[0071] The air flow channel 35 is communicated with the interior of the top cover 30 through the first ventilation holes 313, so that the drying chamber 32 can also provide (hot) air flow to the interior even when it is located outside; and the drying chamber 32 arranged outside does not occupy the internal space, making the cooperation between the cover body 31 and the material tray better.

[0072] In one embodiment, please refer to Figure 5 and Figure 6 , the number of the guide plates 36 is multiple, and the multiple guide plates 36 converge from the first side 30A to the second side 30B. The number of the first ventilation holes 313 is multiple, and at least one first ventilation hole 313 is opened in each flow guide groove 3521, or each flow guide groove 3521 is communicated with the first ventilation hole 313.

[0073] Specifically, when there are multiple guide plates 36, since the guide space 352 is constricted from the first side 30A to the second side 30B, in order to adapt to the shape of the guide space 352, the multiple guide plates 36 should also show a gradually approaching extension manner. Therefore, a corresponding first ventilation hole 313 should be opened at the end of each flow guide groove 3521, so that each flow guide groove 3521 can guide out a similar volume of air flow.

[0074] Optionally, the number of the first ventilation holes 313 can be one, and each flow guide groove 3521 is communicated with the first ventilation hole 313. It can be understood that the first ventilation hole 313 can be strip-shaped and extend along the axial direction parallel to the main body portion 311, so as to cover multiple flow guide grooves 3521, so that multiple flow guide grooves 3521 can be guided out through the first ventilation hole 313.

[0075] Optionally, the first ventilation hole 313 can be an oval hole, that is, the hole walls of the first ventilation hole 313 are all arc-shaped or straight-line shaped. In this way, the included angle at the first ventilation hole 313 can be reduced to avoid the influence of the included angle at the first ventilation hole 313 on the stability of the air flow.

[0076] By setting the number of the guide plates 36 to be multiple, the air flow in the air flow channel 35 can be divided into multiple strands. The air flow is guided by the guide plates 36 and uniformly guided out, improving the stability and uniformity of the air flow. And the first ventilation hole 313 is set to be one or more to make the air flow uniform and stable, avoiding the formation of turbulent flow due to the collision of multiple strands of air flow.

[0077] In one embodiment, please refer to Figure 3 and Figure 7, the fan 33 includes a first air inlet surface and a second air inlet surface facing away from each other. A second ventilation hole 314 is formed in the cover body 31, and a third ventilation hole 323 is formed in the drying bin 32. The second ventilation hole 314 and the third ventilation hole 323 are arranged opposite to each other. The fan 33 is arranged between the second ventilation hole 314 and the third ventilation hole 323. The first air inlet surface faces the second ventilation hole 314, and the second air inlet surface faces the third ventilation hole 323.

[0078] Specifically, the fan 33 provided by the present utility model is a centrifugal fan 33 with double-sided air inlet. This fan 33 not only has a larger air intake volume, but also has better air intake efficiency and stability. Therefore, in order to make full use of the double-sided air inlet characteristic of the fan 33, ventilation holes can be arranged on both corresponding surfaces of the fan 33. It can be understood that the fan 33 is installed in the drying bin 32, and the two opposite surfaces of the fan 33 are respectively the cover body 31 and the bin body of the drying bin 32. Therefore, two ventilation holes can be respectively formed in the bin body of the drying bin 32 and the cover body 31 to correspond to the two air inlet surfaces of the fan 33.

[0079] In a specific embodiment, when the drying bin 32 is arranged outside, the second ventilation hole 314 communicates with the inside of the top cover 30 and the air flow channel 35, and the third ventilation hole 323 communicates with the external space and the air flow channel 35; when the drying bin 32 is arranged inside, the second ventilation hole 314 communicates with the external space and the air flow channel 35, and the third ventilation hole 323 communicates with the inside of the top cover 30 and the air flow channel 35. Optionally, both the second ventilation hole 314 and the third ventilation hole 323 can be circular holes to adapt to the shape of the air inlet surface of the fan 33.

[0080] By forming the second ventilation hole 314 in the cover body 31 and the third ventilation hole 323 in the drying bin 32, not only can the double-sided air inlet characteristic of the fan 33 be utilized to increase the air flow rate, but also a circulating air flow can be formed inside and outside the top cover 30. The external circulation is used to increase the internal air flow. Under the action of the fan, the air pressure in the accommodation cavity increases and then is discharged outside through some gaps of the 3D printing feeding device 100, so as to create an external air flow circulation and dry the materials.

[0081] In one implementation manner, when the drying bin 32 is connected to the outside of the cover body 31, the motor of the fan 33 is close to the third ventilation hole 323, or when the drying bin 32 is connected to the inside of the cover body 31, the motor of the fan 33 is close to the second ventilation hole 314.

[0082] Specifically, the installation orientation of the fan 33 in the drying bin 32 is mainly set such that the motor side of the fan 33 faces outward, because the air intake volume on the motor side of the fan 33 is larger. Therefore, when the drying bin 32 is connected to the outside of the cover body 31, the outside of the third ventilation hole 323 is the outside, and when the drying bin 32 is connected to the inside of the cover body 31, the outside of the second ventilation hole 314 is the outside.

[0083] In one embodiment, please refer to Figure 7 The top cover 30 also includes a first switch 37. When the drying chamber 32 is connected to the inside of the cover body 31, the first switch 37 is set at the second vent 314, or when the drying chamber 32 is connected to the outside of the cover body 31, the first switch 37 is set at the third vent 323.

[0084] Specifically, the first switch 37 is primarily used to block external airflow from entering the airflow channel 35 through the fan 33. Therefore, closing the first switch 37 creates an environment in which air circulates within the 3D printing feeding device 100, while opening the first switch 37 creates an environment in which air circulates both inside and outside the 3D printing feeding device 100. Optionally, the first switch 37 can be a manual switch or an automatic switch, allowing the user to open it when needed.

[0085] In a specific embodiment, when the drying chamber 32 is connected to the interior of the cover 31, the first switch 37 can be movably connected to the outer wall of the cover 31, and the first switch 37 can be closed or opened by, for example, rotating, plugging, or the like. Alternatively, when the drying chamber 32 is connected to the exterior of the cover 31, the first switch 37 can be movably connected to the outer wall of the drying chamber 32, and the first switch 37 can be closed or opened by, for example, rotating, plugging, or the like.

[0086] In one embodiment, during the drying process, the first switch is initially closed, and the fan 33 and heater 34 form an internal circulation within the receiving chamber, thereby rapidly raising the temperature within the receiving chamber. Moisture absorbed by the material evaporates upon heating to produce strands. After a preset internal circulation period, the first switch is controlled to open, and the fan 33 draws air through the third vent 323 to form an external circulation, expelling the humid air from the receiving chamber. This operation achieves both rapid heating and dehumidification, improving dehumidification effectiveness and efficiency.

[0087] In one embodiment, please refer to Figure 3 The line connecting the center point of the first vent hole 313 and the axis of the tray is a first line P, and the line connecting the center point of the second vent hole 314 and the axis of the tray is a second line Q. On a plane perpendicular to the axis of the tray, the angle α between the first line P and the second line Q is 75° to 120°. Optionally, the angle α can be 75°, 80°, 85°, 90°, 95°, 100°, 105°, 110°, 115°, or 120°.

[0088] Specifically, the material tray is a disc-shaped material tray, so the material tray includes an axis. After the material tray is installed on the 3D printing feeding device 100, as shown in FIG. Figure 3 As shown in the first connecting line P and the second connecting line Q, the connecting line between the center point of the second vent hole 314 and the axis of the tray is the second connecting line Q.

[0089] It can be understood that since the air flow channel 35 extends in an arc shape, the included angle formed by the first connection line P and the second connection line Q is the partial arc length corresponding to the air flow channel 35. Specifically, it is the arc length of the air flow within the air flow channel 35 after the air enters the fan 33. Ensuring that the included angle between the first connection line P and the second connection line Q is within the above range can ensure that the air flow has a longer flow path. When the angle is less than the above range, the air flow path is shorter, the diffusibility of the air flow is poor, it is difficult to cover all the trays, and it is easy to cause the distance between the first ventilation hole 313 and the second ventilation hole 314 to be too close, thus forming a short circuit of the wind and preventing the hot air from diffusing to the entire receiving groove; when the angle is greater than the above range, the occupied space of the drying chamber 32 becomes larger, squeezing the tray space or increasing the external volume of the top cover 30, and the controllability of the fan 33 over the air flow at the farthest point of the channel becomes worse.

[0090] In one embodiment, please refer to Figure 7 , the top cover 30 includes a ventilation switch 38, and an external ventilation hole 315 is formed on the cover body 31. The external ventilation hole 315 communicates the inside and the outside of the cover body 31, and the ventilation switch 38 is arranged at the external ventilation hole 315.

[0091] Specifically, the external ventilation hole 315 can be an air outlet formed on the outer edge 312 of the cover body 31. The main function of the external ventilation hole 315 is to assist the second ventilation hole 314 and the third ventilation hole 323 to complete the external air circulation. Optionally, the number of the external ventilation holes 315 can be two, which are respectively arranged at both ends of the second side 30B. The external ventilation hole 315 can be an oval hole.

[0092] Furthermore, the ventilation switch 38 is also a manual switch. The ventilation switch 38 is slidably connected to the outer edge 312, and the ventilation switch 38 slides left and right to open or close the external ventilation hole 315. By providing the external ventilation hole 315 on the 3D printing feeding device 100, the dehumidification effect can be improved, enabling the fan to discharge the humid air to the outside during the process of internal circulation or external circulation.

[0093] In one embodiment, the present utility model further provides a 3D printing feeding device with a fan installed on the outer shell. Please refer to Figures 8 to 12 , wherein the top cover 30 only includes the cover body 31 and the drying chamber 32; the drying chamber 32 is arranged outside the cover body 31, and the drying chamber 32 extends in a flared shape away from the cover body 31. An air port 324 is formed at one end of the drying chamber 32 far from the cover body 31. The air port 324 communicates the air flow channel 35 and the drying chamber 32, and a first ventilation hole 313 is formed on the cover body 31. The first ventilation hole 313 communicates the inside of the cover body 31 and the air flow channel 35.

[0094] Specifically, the two opposite ends of the cover 31 in the circumferential direction are the first side 30A and the second side 30B respectively. In a specific embodiment, the first side 30A is the connection part of the top cover 30 and the outer shell 10, that is, the rotating shaft 21 and the mounting part 20 are installed on the first side 30A, and the second side 30B faces away from the first side 30A, so the second side 30B is the opening of the top cover 30 and the outer shell 10. The drying bin 32 is connected at a position close to the first side 30A.

[0095] Furthermore, an air port 324 is provided on the side of the drying bin 32 away from and facing away from the cover 31, and external air enters the air flow channel 35 through the air port 324. And when the drying bin 32 is arranged outside, if the air flow it provides is to reach the inside of the top cover 30, it has to pass through the cover 31. Therefore, a first ventilation hole 313 needs to be provided on the cover 31, and the first ventilation hole 313 is the outlet of the air flow channel 35.

[0096] The external space, the air flow channel 35 and the inside of the top cover 30 are connected through the first ventilation hole 313 and the air port 324, so that external air can enter the top cover 30 under the negative pressure inside the top cover 30; and the drying bin 32 arranged outside does not occupy the internal space, making the cooperation between the cover 31 and the material tray better.

[0097] In one implementation, please refer to Figure 9 , the top cover 30 includes a flow guide plate 36, the flow guide plate 36 is received in the air flow channel 35 and connected to the drying bin 32, the flow guide plate 36 extends from one side of the air port 324 to the cover 31 and is connected to the cover 31, and the flow guide plate 36 divides the air flow channel 35 to form at least two flow guide grooves 3521. In this embodiment, the setting method of the flow guide plate 36 can refer to the above embodiment, and will not be elaborated here. Optionally, one end of the flow guide plate 36 extends to the air port 324, so that the flow guide plate 36 diverts the gas at the air port 324 where the drying bin 32 intakes air.

[0098] In one implementation, please refer to Figure 9 , the number of the flow guide plates 36 is multiple, multiple flow guide plates 36 converge from the cover 31 to the air port 324, the number of the first ventilation holes 313 is multiple, and each flow guide groove 3521 is communicated with the first ventilation hole 313.

[0099] In one implementation, please refer to Figure 8 and Figure 12 , a receiving bin 11 is connected to the side wall of the outer shell 10, the fan 33 and the heating element 34 are both received in the receiving bin 11, and the receiving bin 11 is used to provide hot air and is connected to the air port 324, so as to blow the hot air into the receiving cavity. In a specific embodiment, an air outlet is provided on the receiving bin 11, and the air outlet and the air port 324 are connected through a connecting pipe.

[0100] In one embodiment, the blower 33 is a centrifugal blower. The blower 33 includes an air inlet surface. The blower 33 sucks air from the air inlet surface and blows hot air into the accommodation chamber. Under the action of positive pressure, the accommodation chamber discharges the hot air and takes away the humid air.

[0101] In one embodiment, the blower 33 is a double-sided air inlet centrifugal blower. The blower 33 includes a first air inlet surface and a second air inlet surface which are opposite to each other. A second ventilation hole 314 is formed in the side wall of the housing 10. A third ventilation hole 323 is formed in the wall plate of the accommodation bin 11 opposite to the side wall of the housing 10. The second ventilation hole 314 and the third ventilation hole 323 are arranged oppositely. The blower 33 is arranged between the second ventilation hole 314 and the third ventilation hole 323. The first air inlet surface faces the second ventilation hole 314, and the second air inlet surface faces the third ventilation hole 323. The first air inlet surface and the second air inlet surface of the blower 33 can extract gas from the accommodation chamber or the external space of the accommodation bin 11 through the second ventilation hole 314 and the third ventilation hole 323.

[0102] In one embodiment, the present invention further provides a 3D printing device. The 3D printing device includes a 3D printer and a 3D printing feeding device 100.

[0103] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0104] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A top cover for a 3D printing feeding device, the top cover being used to cover a part of the outer periphery of a material tray, characterized in that, It includes a cover body and a drying bin. Among them, the drying bin is arranged inside or outside the cover body, and the drying bin is connected to the cover body. The cover body and the drying bin jointly enclose an air flow channel, and the air flow channel communicates with the inside of the cover body.

2. The top cover according to claim 1, characterized in that, The cross-section of the cover body is circular arc. Along the circumference of the cover body, the cover body includes a first side and a second side that face away from each other. The air flow channel extends in an arc along the outer circumference of the cover body. The outlet of the air flow channel is close to the first side, and a blower is placed near the second side.

3. The top cover according to claim 2, characterized in that, The air flow channel includes a connected receiving space and a guiding space. The receiving space is located at one end of the guiding space close to the second side. Along the direction from the second side to the first side, the guiding space extends in a flared shape. The receiving space is used to receive the blower.

4. The top cover according to claim 3, characterized in that, The top cover includes a guiding plate. The guiding plate is received in the guiding space and connected to the cover body. Along the circumference of the cover body, the guiding plate extends from the first side to the second side. The guiding plate divides the guiding space to form at least two guiding grooves.

5. The top cover according to claim 4, characterized in that, When the drying bin is connected to the outside of the cover body, a first ventilation hole is opened on the cover body. The first ventilation hole communicates with the inside of the cover body and the air flow channel. The first ventilation hole is close to the first side.

6. The top cover according to claim 5, characterized in that, The number of the guiding plates is multiple. The multiple guiding plates converge from the first side to the second side. The number of the first ventilation holes is multiple. At least one first ventilation hole is opened in each guiding groove, or each guiding groove communicates with the first ventilation hole.

7. The top cover according to claim 5, characterized in that, The blower includes a first air inlet surface and a second air inlet surface that face away from each other. A second ventilation hole is opened on the cover body, and a third ventilation hole is opened on the drying bin. The second ventilation hole and the third ventilation hole are arranged opposite to each other. The blower is arranged between the second ventilation hole and the third ventilation hole. The first air inlet surface faces the second ventilation hole, and the second air inlet surface faces the third ventilation hole.

8. The top cover according to claim 7, characterized in that, When the drying bin is connected to the outside of the cover body, the motor of the blower is close to the third ventilation hole, or when the drying bin is connected to the inside of the cover body, the motor of the blower is close to the second ventilation hole.

9. The top cover according to claim 7, wherein The top cover further includes a first switch. When the drying bin is connected to the inside of the cover body, the first switch is arranged at the second ventilation hole, or when the drying bin is connected to the outside of the cover body, the first switch is arranged at the third ventilation hole.

10. The top cover according to claim 7, characterized in that, The connection line between the center point of the first ventilation hole and the axis of the tray is the first connection line, and the connection line between the center point of the second ventilation hole and the axis of the tray is the second connection line. In a plane perpendicular to the axis of the tray, the included angle between the first connection line and the second connection line is 75° to 120°.

11. The top cover according to claim 5, characterized in that, The top cover includes a ventilation switch. An external ventilation hole is opened on the cover body. The external ventilation hole communicates with the inside and the outside of the cover body. The ventilation switch is arranged at the external ventilation hole. The external ventilation hole and the first ventilation hole are on two opposite sides of the cover body.

12. The top cover according to claim 1, characterized in that, The drying bin is arranged outside the cover body. The drying bin extends in a necking shape away from the cover body. An air port is formed at one end of the drying bin away from the cover body. The air port communicates the air flow channel and the drying bin. A first ventilation hole is formed in the cover body, and the first ventilation hole communicates the inside of the cover body and the air flow channel.

13. The top cover according to claim 12, characterized in that, The top cover includes a guide plate. The guide plate is received in the air flow channel and connected to the drying bin. The guide plate extends from one side of the air port towards the cover body and is connected to the cover body. The guide plate divides the air flow channel to form at least two guide grooves.

14. The top cover according to claim 13, characterized in that, The number of the guide plates is multiple. The multiple guide plates converge from the cover body towards the air port. The number of the first ventilation holes is multiple, and each guide groove communicates with the first ventilation hole.

15. A 3D printing feeding device, characterized in that, The 3D printing feeding device includes a fan, a housing, and a top cover according to any one of claims 1-14. The housing and the top cover are detachably connected.

16. The 3D printing feeding device according to claim 15, characterized in that, The fan is received in the drying bin.

17. The 3D printing feeding device according to claim 15, characterized in that, The fan is installed outside the housing, and the fan is connected to the side plate of the housing.

18. A 3D printing device, characterized in that, The 3D printing device includes a 3D printer and a 3D printing feeding device according to any one of claims 15-17.

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