Air box and 3D printing equipment

Abstract

The utility model discloses an air bellow and 3D printing equipment, the air bellow comprises a box body and a cover plate arranged above the box body, a bottom plate of the box body is provided with a plurality of air inlets, the cover plate is provided with a plurality of air outlets, a first partition plate is arranged in the box body, a first cavity is formed between the first partition plate and the cover plate, and a second partition plate is arranged in the first cavity. A second cavity is formed between the first partition plate and the bottom plate, a plurality of vent holes are formed in the first partition plate, a plurality of second partition plates are arranged in the second cavity, the upper ends of the second partition plates are connected with the first partition plate, the lower ends of the second partition plates are connected with the bottom plate, and the second cavity comprises a plurality of second sub-cavities which are separated from one another; the first cavity is communicated with at least one air outlet and at least one vent hole, and each second sub-cavity is communicated with at least one air inlet and at least one vent hole. According to the utility model, airflow can be homogenized in the air bellow, uniform air is discharged, and the uniformity of printed products is improved.

Description

Technical Field

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

[0002] 3D printing technology is an additive manufacturing technology that can achieve rapid prototyping of objects. A 3D printing device is a device that uses 3D printing technology, based on a digital model file, and uses materials such as powder, filament, paste, etc., to manufacture three-dimensional objects by layer-by-layer printing.

[0003] During the printing process of a 3D printing device, smoke and particles will be generated on the printing platform and need to be discharged as soon as possible to avoid affecting the printing quality. Therefore, a combination of a common fan and a bellows is used to blow air onto the printing platform to discharge the smoke and particles.

[0004] In the prior art, since the sizes of the air inlet and the air outlet of the bellows are quite different, and the high-speed air flow has inertia and viscous effects, the wind speed and air volume in the traveling direction of the wind blown from the air outlet to the printing platform are not equal, thus seriously affecting the uniformity of the product.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a bellows and a 3D printing device. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a bellows and a 3D printing device that can evenly distribute air so that the wind speed and air volume at each position blown from the air outlet to the printing platform are equal.

[0007] To achieve the above purpose, the technical solution provided by an embodiment of the utility model is as follows:

[0008] A bellows, the bellows includes a box body and a cover plate arranged above the box body. A plurality of air inlets are opened on the bottom plate of the box body, and a plurality of air outlets are opened on the cover plate. A first partition is arranged in the box body. A first cavity is formed between the first partition and the cover plate, and a second cavity is formed between the first partition and the bottom plate. A plurality of ventilation holes are opened on the first partition. A plurality of second partitions are arranged in the second cavity. The upper end of the second partition is connected to the first partition, and the lower end is connected to the bottom plate. The second cavity includes a plurality of mutually separated second sub-cavities. The first cavity is communicated with at least one air outlet and at least one ventilation hole, and each second sub-cavity is communicated with at least one air inlet and at least one ventilation hole.

[0009] In one embodiment, the box body further includes a first side plate and a second side plate which are oppositely arranged, a third side plate and a fourth side plate which are oppositely arranged, and a fifth side plate and a sixth side plate which are oppositely arranged. The upper end of the third side plate is connected to the cover plate, and the lower end is connected to the fifth side plate. The front and rear ends of the third side plate are respectively connected to the first side plate and the second side plate. The upper end of the fourth side plate is connected to the cover plate, and the lower end is connected to the sixth side plate. The front and rear ends of the fourth side plate are respectively connected to the first side plate and the second side plate. The lower end of the fifth side plate is connected to the bottom plate. The front and rear ends of the fifth side plate are respectively connected to the first side plate and the second side plate. The lower end of the sixth side plate is connected to the bottom plate. The front and rear ends of the sixth side plate are respectively connected to the first side plate and the second side plate.

[0010] In one embodiment, the fifth side plate is inclined and arranged between the third side plate and the bottom plate, and the sixth side plate is inclined and arranged between the fourth side plate and the bottom plate. The included angle between the fifth side plate and the bottom plate facing the first partition is an obtuse angle, and the included angle between the sixth side plate and the bottom plate facing the first partition is an obtuse angle.

[0011] In one embodiment, the first partition is arranged parallel to the cover plate and is respectively connected to the first side plate, the second side plate, the third side plate and the fourth side plate.

[0012] In one embodiment, at least two first partitions are spaced apart in the box body. A first cavity is formed between the cover plate and the uppermost first partition, a second cavity is formed between the bottom plate and the lowermost first partition, the upper end of the second partition is connected to the bottom of the lowermost first partition, and a third cavity is formed between two adjacent first partitions.

[0013] In one embodiment, the ventilation holes in two adjacent first partitions are arranged in a staggered manner in a direction perpendicular to the first partition.

[0014] In one embodiment, the second partition includes a first straight plate, a second straight plate and a third straight plate which are connected. The upper end of the first straight plate is connected to the first partition, the lower end of the third straight plate is connected to the bottom plate, and the two ends of the second straight plate are respectively connected to the lower end of the first straight plate and the upper end of the third straight plate.

[0015] In one embodiment, along the direction away from the central axis of the box body, the length of the third straight plate gradually decreases, the length of the second straight plate gradually increases, and the length of the first straight plate remains unchanged.

[0016] In one embodiment, the multiple first straight plates are equally spaced in the second cavity, and the multiple third straight plates are equally spaced in the second cavity.

[0017] The technical solution provided by another embodiment of the present invention is as follows:

[0018] A 3D printing device, the 3D printing device includes the above-mentioned air box.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] A first partition and a second partition are arranged between the air inlet and the air outlet of the air bellows of the utility model. A plurality of ventilation holes are formed in the first partition, so that the air flow is homogenized multiple times in the box body. After the mutual conversion of dynamic pressure and static pressure, the air flow discharged from the air outlet is realized, and on the air outlet plane, along the advancing direction of the air flow, the wind speed and air volume at each position are equal. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or 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 drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the air bellows in Embodiment 1 of the present utility model;

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the air bellows in Embodiment 1 of the present utility model;

[0024] Figure 3 is Figure 2 a partial schematic diagram at A in

[0025] Figure 4 It is a schematic structural diagram of the air bellows with two first partitions arranged in the box body of the present utility model.

[0026] Main reference numeral description:

[0027] 11 - box body, 111 - first side plate, 112 - second side plate, 113 - third side plate, 114 - fourth side plate, 115 - fifth side plate, 116 - sixth side plate, 117 - bottom plate, 12 - cover plate, 21 - first partition, 22 - second partition, 221 - first straight plate, 222 - second straight plate, 223 - third straight plate, 31 - sealing pipe. Detailed Embodiments

[0028] To enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Embodiment 1:

[0030] Refer Figure 1 And in combination with Figure 2 As shown, the bellows in this embodiment includes a box body 11 and a cover plate 12 provided above the box body. A plurality of air inlets are opened on the bottom plate 117 of the box body 11, and a plurality of air outlets are opened on the cover plate 12. A first partition 21 is arranged in the box body 11. A first cavity is formed between the first partition 21 and the cover plate 12, and a second cavity is formed between the first partition 21 and the bottom plate 117. A plurality of ventilation holes are opened on the first partition 21. A plurality of second partitions 2 are arranged in the second cavity. The upper end of the second partition 22 is connected to the first partition 21, and the lower end is connected to the bottom plate 117. The second cavity includes a plurality of mutually separated second sub-cavities. The first cavity is connected to at least one air outlet and at least one ventilation hole, and each second sub-cavity is connected to at least one air inlet and at least one ventilation hole.

[0031] Among them, the length of the bottom plate 117 is less than the length of the cover plate 12.

[0032] In this embodiment, the box body 11 further includes a first side plate 111 and a second side plate 112 arranged oppositely, a third side plate 113 and a fourth side plate 114 arranged oppositely, and a fifth side plate 115 and a sixth side plate 116 arranged oppositely. The upper end of the third side plate 113 is connected to the cover plate 12, and the lower end is connected to the fifth side plate 115. The front and rear ends of the third side plate 113 are respectively connected to the first side plate 111 and the second side plate 112. The upper end of the fourth side plate 114 is connected to the cover plate 12, and the lower end is connected to the sixth side plate 116. The front and rear ends of the fourth side plate 114 are respectively connected to the first side plate 111 and the second side plate 112. The lower end of the fifth side plate 115 is connected to the bottom plate 117. The front and rear ends of the fifth side plate 115 are respectively connected to the first side plate 111 and the second side plate 115. The lower end of the sixth side plate 116 is connected to the bottom plate 117. The front and rear ends of the sixth side plate 116 are respectively connected to the first side plate 111 and the second side plate 112.

[0033] Specifically, the six side plates of the box body 11, the bottom plate 117, and the cover plate 12 provided above the box body enclose to form a closed cavity.

[0034] Exemplarily, the cover plate 12 in this embodiment is a flange cover for easy installation and disassembly.

[0035] In this embodiment, the fifth side plate 115 is inclined between the third side plate 113 and the bottom plate 117, and the sixth side plate 116 is inclined between the fourth side plate 114 and the bottom plate 117.

[0036] Wherein, the included angle between the fifth side plate 115 and the bottom plate 117 facing the first partition 21 is an obtuse angle, and the included angle between the sixth side plate 116 and the bottom plate 117 facing the first partition 21 is an obtuse angle.

[0037] In this embodiment, the first partition 21 is arranged parallel to the cover plate 12 and is respectively connected to the first side plate 111, the second side plate 112, the third side plate 113 and the fourth side plate 114.

[0038] Preferably, there is no gap between the first partition 21 and the first side plate 111, the second side plate 112, the third side plate 113 and the fourth side plate, and the air flow passes through the first partition 21 only through the ventilation holes on the first partition 21.

[0039] Wherein, the ventilation holes can be cylindrical, cubic or cuboid. And a plurality of ventilation holes are arranged at equal intervals on the first partition 21.

[0040] Further, at least two first partitions 21 are arranged at intervals in the box body 11. A first cavity is formed between the cover plate 12 and the uppermost first partition 21, a second cavity is formed between the bottom plate 117 and the lowermost first partition 21, the upper end of the second partition 22 is connected to the bottom of the lowermost first partition 21, and a third cavity is formed between two adjacent first partitions 21.

[0041] Wherein, the ventilation holes in two adjacent first partitions 21 are arranged in a staggered manner in the direction perpendicular to the first partition 21.

[0042] In this embodiment, three first partitions 21 are arranged at intervals in the box body 11. The three first partitions 21 are parallel to each other, and a third cavity is formed between every two adjacent first partitions 21.

[0043] Combined Figure 3 As shown, the ventilation holes in this embodiment are designed as cuboids, the distance between adjacent ventilation holes is the same as the width of the ventilation holes, and the uppermost first partition 21 is the same as the lowermost first partition 21.

[0044] Of course, in other embodiments, the number of the first partitions can also be 2 or more than 4. As Figure 4 shown is a schematic diagram of a box body with two first partitions 21. At this time, only one third cavity is included.

[0045] It should be understood that the number and spacing of the first partition plates 21 need to be designed according to requirements. The more the number of the first partition plates 21, the greater the resistance that the gas needs to overcome when passing through, the greater the energy consumption, and the smaller the gas flow rate when finally entering the first cavity.

[0046] In this embodiment, the second partition plate 22 includes a connected first straight plate 221, a second straight plate 222, and a third straight plate 223. The upper end of the first straight plate 221 is connected to the first partition plate 21, the lower end of the third straight plate 223 is connected to the bottom plate 117, and both ends of the second straight plate 222 are respectively connected to the lower end of the first straight plate 221 and the upper end of the third straight plate 223.

[0047] Among them, the second partition plate 22 is connected to the first side plate 111 and the second side plate 112. Preferably, there is no gap between the second partition plate 22 and the first side plate 111 and the second side plate 112.

[0048] In the second cavity of this embodiment, a second partition plate 22 is provided along the central axis of the box body 11, and the number of second partition plates 22 on both sides of the central axis of the box body 11 is equal. Among the second partition plates 22 on both sides of the central axis of the box body 11, the second straight plate 222 is inclined between the first straight plate 221 and the third straight plate 223, and the angle between the first straight plate 221 and the second straight plate 222 facing the central axis of the box body 11 is an obtuse angle. The multiple second partition plates 22 divide the second cavity into several second sub-cavities.

[0049] In addition, along the direction away from the central axis of the box body 11, the length of the third straight plate 223 gradually decreases, the length of the second straight plate 222 gradually increases, and the length of the first straight plate 221 remains unchanged.

[0050] In this embodiment, a total of 9 second partition plates 22 are provided in the second cavity, dividing the second cavity into 10 second sub-cavities. The 9 first straight plates 221 are equally spaced in the second cavity, and the distance between the third side plate 113 and the leftmost first straight plate 221 is equal to the distance between adjacent two first straight plates 221, and the distance between the fourth side plate 114 and the rightmost first straight plate 221 is equal to the distance between adjacent two first straight plates 221. The 9 third straight plates 223 are equally spaced in the second cavity.

[0051] It should be noted that the number and spacing of the second partition plates 22 should also be reasonably designed according to requirements. Too many second partition plates 22 will increase the resistance that the gas needs to overcome when passing through and increase the energy consumption.

[0052] Exemplarily, the first straight plate 221 is perpendicular to the first partition plate 21, and the third straight plate 223 is perpendicular to the bottom plate 117.

[0053] The working principle of the air box in this embodiment is as follows:

[0054] Airflow enters the second cavity from the air inlet. First, it undergoes preliminary homogenization through the second partition 22. At the air inlet, the third straight plate 223 evenly divides the airflow into multiple sub-airflows, which respectively pass through the second sub-cavities. Then, it enters the third cavity through the ventilation holes on the first partition 21, and after secondary homogenization by multiple first partitions 21 and the third cavity, it enters the first cavity for overall homogenization.

[0055] In summary, after multiple rounds of mutual conversion between dynamic pressure and static pressure of the airflow in the air box, relatively uniform air is discharged at the air outlet. On the air outlet plane, along the direction of the airflow, the wind speed and air volume at each position are equal.

[0056] Furthermore, the air box in this embodiment can be applied to 3D printing equipment. The air inlet of the air box is connected to the air outlet of an external fan through a sealing pipe 31. The airflow generated by the external fan reaches the air inlet through the sealing pipe 31, is separated by the third straight plate 223 at the air inlet, and respectively enters several second sub-cavities to obtain preliminary homogenization. Then, it enters the third cavity through the ventilation holes on the first partition 21, and after passing through multiple first partitions 21 and the third cavity from bottom to top, it obtains secondary homogenization. Finally, after overall homogenization in the first cavity, it is discharged from the air outlet, realizing that on the air outlet plane, along the direction of the airflow, the wind speed and air volume at each position are equal. The homogenized air blows from the air outlet to the printing platform, discharging the dust, particles, etc. generated during the printing process, and obtaining a 3D printing product with better uniformity.

[0057] Exemplarily, the wind speed at the air outlet in this embodiment is 2 m / s to 4 m / s.

[0058] It can be seen from the above technical solutions that the present utility model has the following beneficial effects:

[0059] The present utility model is provided with a first partition and a second partition between the air inlet and the air outlet of the air box. A number of ventilation holes are opened on the first partition, enabling the airflow to be homogenized multiple times in the box. After mutual conversion between dynamic pressure and static pressure, the airflow discharged from the air outlet is realized, and on the air outlet plane, along the direction of the airflow, the wind speed and air volume at each position are equal.

[0060] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0061] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bellows, characterized in that, The bellow includes a box body and a cover plate arranged above the box body. A plurality of air inlets are formed in the bottom plate of the box body, and a plurality of air outlets are formed in the cover plate. A first partition is arranged in the box body. A first cavity is formed between the first partition and the cover plate, and a second cavity is formed between the first partition and the bottom plate. A plurality of ventilation holes are formed in the first partition. A plurality of second partitions are arranged in the second cavity. The upper ends of the second partitions are connected to the first partition, and the lower ends are connected to the bottom plate. The second cavity includes a plurality of mutually separated second sub-cavities. The first cavity is communicated with at least one air outlet and at least one ventilation hole, and each second sub-cavity is communicated with at least one air inlet and at least one ventilation hole.

2. The bellow according to claim 1, wherein, The box body further includes a first side plate and a second side plate arranged oppositely, a third side plate and a fourth side plate arranged oppositely, and a fifth side plate and a sixth side plate arranged oppositely. The upper end of the third side plate is connected to the cover plate, and the lower end is connected to the fifth side plate. The front and rear ends of the third side plate are respectively connected to the first side plate and the second side plate. The upper end of the fourth side plate is connected to the cover plate, and the lower end is connected to the sixth side plate. The front and rear ends of the fourth side plate are respectively connected to the first side plate and the second side plate. The lower end of the fifth side plate is connected to the bottom plate. The front and rear ends of the fifth side plate are respectively connected to the first side plate and the second side plate. The lower end of the sixth side plate is connected to the bottom plate. The front and rear ends of the sixth side plate are respectively connected to the first side plate and the second side plate.

3. The bellow according to claim 2, characterized in that, The fifth side plate is obliquely arranged between the third side plate and the bottom plate, and the sixth side plate is obliquely arranged between the fourth side plate and the bottom plate. The included angle between the fifth side plate and the bottom plate facing the first partition is an obtuse angle, and the included angle between the sixth side plate and the bottom plate facing the first partition is an obtuse angle.

4. The bellow according to claim 2, characterized in that, The first partition is arranged parallel to the cover plate and is respectively connected to the first side plate, the second side plate, the third side plate and the fourth side plate.

5. The bellow according to claim 4, characterized in that, At least two first partitions are spaced apart in the box body. The first cavity is formed between the cover plate and the uppermost first partition, the second cavity is formed between the bottom plate and the lowermost first partition, the upper ends of the second partitions are connected to the bottom of the lowermost first partition, and a third cavity is formed between two adjacent first partitions.

6. The bellow according to claim 5, wherein The ventilation holes in two adjacent first partitions are arranged in a staggered manner in a direction perpendicular to the first partition.

7. The bellow according to claim 1, characterized in that, The second partition includes a connected first straight plate, a second straight plate and a third straight plate. The upper end of the first straight plate is connected to the first partition, the lower end of the third straight plate is connected to the bottom plate, and the two ends of the second straight plate are respectively connected to the lower end of the first straight plate and the upper end of the third straight plate.

8. The bellow according to claim 7, characterized in that, Along the direction away from the central axis of the box body, the length of the third straight plate gradually decreases, the length of the second straight plate gradually increases, and the length of the first straight plate remains unchanged.

9. The bellow according to claim 7, characterized in that, The plurality of first straight plates are equidistantly distributed in the second cavity, and the plurality of third straight plates are equidistantly distributed in the second cavity.

10. A 3D printing device, characterized in that, The 3D printing device includes the bellow according to any one of claims 1 to 9.

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