3D printing device

Abstract

The 3D printing device comprises a working box, a powder spreading device, a powder adding mechanism and a first powder receiving mechanism, the powder spreading device is movably arranged on the working box, the first powder receiving mechanism is located on the side, perpendicular to the moving direction of the powder spreading device, of the working box, and the first powder receiving mechanism comprises a first guide rail and a first powder receiving bin; the first powder receiving bin is movably arranged on the first guide rail, the first powder receiving bin has three working states, when the first powder receiving bin is in the first working state, the side edge of an opening of the first powder receiving bin is in sealing fit with the side edge of the working box, and the opening of the first powder receiving bin is not higher than the side edge of the working box; when the first powder receiving bin is in the second working state, the first powder receiving bin is matched and communicated with the powder spreading device; and when the first powder receiving bin is in the third working state, the first powder receiving bin is matched and communicated with the powder adding mechanism. According to the scheme, the problem that a large amount of powder is wasted easily in the powder spreading process of each layer can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a 3D printing device. Background Art

[0002] In 3D printing technology, granular or powdered materials are usually added to the powder spreader first, and the powder spreader steps forward to spread the powder material on the powder spreading surface, and then the powder is flattened with a scraper or other tools. Finally, the print head selectively sprays the bonding material onto the spread powder according to the cross-sectional shape of the designed product prototype, so that the powder material is bonded together to form the prototype cross-section of the product. After one layer is printed, the workbench descends to the height of a cross-section, and the above steps are repeated until the prototype printing is completed.

[0003] Since the powder spreading process is carried out layer by layer, the mobile powder spreader will push some excess powder out of the working box during the laying of each layer of powder. Usually, this part of powder does not participate in printing and will be directly used as waste powder, resulting in a large amount of waste powder at the end of printing, which is a great waste. Utility Model Content

[0004] Based on this, it is necessary to provide a 3D printing device to address the problem of a large amount of powder waste in the process of laying each layer of powder.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] The utility model embodiment discloses a 3D printing device, including a working box, a powder spreader, a powder adding mechanism and a first powder receiving mechanism, the powder spreader is movably arranged on the working box, the first powder receiving mechanism is located on a side of the working box perpendicular to the moving direction of the powder spreader, the first powder receiving mechanism includes a first guide rail and a first powder receiving bin, the first powder receiving bin is movably arranged on the first guide rail, and the first powder receiving bin includes three working states, when the first powder receiving bin is in the first working state, the side edge of the opening of the first powder receiving bin is sealed with the side edge of the working box, and the opening of the first powder receiving bin is not higher than the side edge of the working box; when the first powder receiving bin is in the second working state, the first powder receiving bin is in communication with the powder spreader; when the first powder receiving bin is in the third working state, the first powder receiving bin is in communication with the powder adding mechanism.

[0007] In one embodiment, when the first powder receiving bin is in the first working state, the opening of the first powder receiving bin extends along the side edge of the working box, and both ends of the opening of the first powder receiving bin exceed the side edge of the working box.

[0008] In one embodiment, the first powder receiving mechanism further includes a stirring member, and the stirring member is movably disposed in the first powder receiving bin.

[0009] In one of the embodiments, the first powder receiving mechanism also includes a driving member and a powder baffle plate. A discharge port connected to the powder spreader is opened at the bottom of the first powder receiving bin. The powder baffle plate is movably arranged at the bottom of the first powder receiving bin, and the driving member is connected to the powder baffle plate. The driving member drives the powder baffle plate to open or close the discharge port.

[0010] In one embodiment, the area of ​​the bottom of the first powder receiving bin gradually increases toward the opening.

[0011] In one of the embodiments, a second powder receiving mechanism is further included, which is located on the other side of the working box and is arranged opposite to the first powder receiving mechanism. The second powder receiving mechanism includes a second guide rail and a second powder receiving bin. The second powder receiving bin is movably arranged on the second guide rail, and the first powder receiving bin includes two working states. When the second powder receiving bin is in the first working state, the opening side of the second powder receiving bin is sealed with the side edge of the working box, and the opening of the second powder receiving bin is not higher than the side edge of the working box; when the first powder receiving bin is in the second working state, the first powder receiving bin is connected with the powder spreader.

[0012] In one of the embodiments, the powder adding mechanism includes a powder adding bin and a material equalizing component, and the material equalizing component is arranged at the bottom of the powder adding bin. When the first powder receiving bin is in the third working state, the first powder receiving bin is connected with the powder adding mechanism, and at least part of the material equalizing component is in the first powder receiving bin.

[0013] In one of the embodiments, the material equalizing component includes a connecting plate and a material equalizing piece, the material equalizing piece is arranged at the bottom of the connecting plate, and a material hole is opened on the connecting plate. When the first powder receiving bin is in the third working state, the connecting plate matches the opening of the first powder receiving bin, and the first powder receiving bin is connected to the powder adding mechanism through the material hole, and at least part of the material equalizing piece is in the first powder receiving bin.

[0014] In one embodiment, the material distribution member is a spiral rod, and the spiral rod extends along the length direction of the first powder receiving bin.

[0015] The technical solution adopted by the utility model can achieve the following beneficial effects:

[0016] In the 3D printing device disclosed in the embodiment of the utility model, a first powder receiving mechanism is added, so that the powder pushed out by the powder spreader during the powder spreading process can be collected in real time, and the first powder receiving bin moves on the first guide rail, so that the collected powder can be used for powder spreading again. Such operation will not produce old powder, thereby reducing the amount of raw materials, improving the utilization rate of powder, and solving the problem of a large amount of powder waste in the process of each layer of powder spreading; at the same time, the first powder receiving mechanism can also play a transition powder adding function, thereby improving the powder adding efficiency and thus improving the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a 3D printing device disclosed in an embodiment of the utility model;

[0018] Figure 2 It is a schematic structural diagram of the material leveling assembly disclosed in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 100-working box, 200-powder spreader, 300-powder adding mechanism, 310-powder adding bin, 320-material equalizing component, 321-connecting plate, 321a-material hole, 322-material equalizing piece, 400-first powder receiving mechanism, 410-first guide rail, 420-first powder receiving bin, 500-second powder receiving mechanism, 510-second guide rail, 520-second powder receiving bin. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] like Figure 1 As shown, an embodiment of the utility model discloses a 3D printing device, and the disclosed 3D printing device includes a working box 100, a powder spreader 200, a powder adding mechanism 300 and a first powder receiving mechanism 400.

[0025] The powder spreader 200 is movably arranged on the working box 100. During operation, the movable powder spreader 200 spreads printing powder layer by layer on the working box 100. The first powder receiving mechanism 400 is located on the side of the working box 100 perpendicular to the moving direction of the powder spreader 200. Specifically, since the end of the powder spreader 200 moved to during the powder spreading process is easy to scrape out the excess powder, the first powder receiving mechanism 400 is located on the side of the working box 100 perpendicular to the moving direction of the powder spreader 200, that is, the first powder receiving mechanism 400 is located on the side of the end of the powder spreader 200 moved to spread the powder, so as to ensure that the excess powder scraped out from the powder spreader 200 can be received.

[0026] The specific structure of the first powder receiving mechanism 400 includes a first guide rail 410 and a first powder receiving bin 420. The first powder receiving bin 420 is movably disposed on the first guide rail 410. It should be noted that the first guide rail 410 can be a lifting mechanism, and the first powder receiving bin 420 can be lifted and lowered on the first guide rail 410 to meet different working conditions.

[0027] Specifically, the first powder receiving bin 420 includes three working states. When the first powder receiving bin 420 is in the first working state, the side edge of the opening of the first powder receiving bin 420 is sealed with the side edge of the working box 100, and the opening of the first powder receiving bin 420 is not higher than the side edge of the working box 100. That is, the first powder receiving bin 420 moves on the first guide rail 410, and stops when the first powder receiving bin 420 moves to the side edge of the working box 100 to seal, and then the first powder receiving bin 420 can be used for material receiving work, that is, it can receive the powder scraped out of the working box 100 by the powder spreader 200 during the powder spreading process.

[0028] When the first powder receiving bin 420 is in the second working state, the first powder receiving bin 420 is connected with the powder spreader 200; that is, the first powder receiving bin 420 moves on the first guide rail 410, and when the first powder receiving bin 420 moves to a preset position, the powder spreader 200 moves to a position connected with the first powder receiving bin 420, and then the first powder receiving bin 420 can transport the powder to the powder spreader 200.

[0029] When the first powder receiving bin 420 is in the third working state, the first powder receiving bin 420 is connected with the powder adding mechanism 300. That is, the first powder receiving bin 420 moves on the first guide rail 410, and stops when the first powder receiving bin 420 moves to a position matching the powder adding mechanism 300, and then the powder adding mechanism 300 conveys the powder to the first powder receiving bin 420, and then conveys the powder to the powder spreading device 200 through the first powder receiving bin 420, that is, the first powder receiving bin 420 plays the role of transitionally adding powder to the powder spreading device 200 at this time.

[0030] Correspondingly, in the specific working process, the working status of the first powder receiving bin 420 can also be transformed into each other, that is, when the first powder receiving bin 420 moves freely according to the specific situation, it can not only play the role of receiving powder, but also can timely add the full powder to the powder spreader 200, and can also play the role of transitional powder adding in time, so as to ensure work efficiency.

[0031] Of course, it should be noted that since the first powder receiving bin 420 is raised and lowered on the first guide rail 410, during the powder adding process, the first powder receiving bin 420 can move upward, and then the powder spreader 200 moves to the bottom of the first powder receiving bin 420, so as to add the powder in the first powder receiving bin 420 to the powder spreader 200. On this basis, the powder adding mechanism 300 can be located above the first powder receiving bin 420, so that powder can be directly added to the first powder receiving bin 420. That is, during the above working process, the powder adding mechanism 300, the first powder receiving bin 420 and the powder spreader 200 can be located in the upper, middle and lower positions to facilitate the powder adding and powder receiving work, and the first powder receiving bin 420 can move freely according to the specific situation.

[0032] It can be seen from the above content that in the 3D printing device disclosed in the embodiment of the utility model, by adding the first powder receiving mechanism 400, the powder pushed out by the powder spreader 200 during the powder spreading process can be collected in real time, and the first powder receiving bin 420 moves on the first guide rail 410, so that the collected powder can be used for powder spreading again. Such operation will not produce old powder, thereby reducing the amount of raw materials, improving the utilization rate of powder, and solving the problem of a large amount of powder waste in the process of each layer of powder spreading; at the same time, the first powder receiving mechanism 400 can also play a transition powder adding function, thereby improving the powder adding efficiency and thus improving the printing efficiency.

[0033] In an optional embodiment, when the first powder receiving bin 420 is in the first working state, the opening of the first powder receiving bin 420 extends along the side edge of the working box 100, that is, the side edge of the opening of the first powder receiving bin 420 is parallel to the side edge of the working box 100, so that the side edge of the opening of the first powder receiving bin 420 can be sealed in contact with the entire side edge of the working box 100, and both ends of the opening of the first powder receiving bin 420 can exceed the side edge of the working box 100, that is, the opening length of the first powder receiving bin 420 is greater than the side edge length of the working box 100. In this way, most of the powder pushed out by the powder spreader 200 during the powder spreading process can be collected by the first powder receiving bin 420, thereby better reducing the amount of raw materials used, improving the utilization rate of powder, and better solving the problem of a large amount of powder waste in the process of each layer of powder spreading.

[0034] Of course, in order to ensure the sealing fit between the opening side of the first powder receiving bin 420 and the side edge of the working box 100, a flexible strip can be provided between the opening side of the first powder receiving bin 420 and the side edge of the working box 100, which can prevent interference between the two and affect the sealing effect while ensuring the sealing effect.

[0035] In the embodiment of the utility model, the first powder receiving mechanism 400 may further include a stirring member, which may be movably disposed in the first powder receiving bin 420. The stirring member can play a role in loosening the powder during the process of conveying the powder from the first powder receiving bin 420 to the powder spreading device 200, thereby ensuring the powder delivery efficiency. Optionally, the stirring member may extend along the length direction of the first powder receiving bin 420, and then the powder may be conveyed to various positions of the first powder receiving bin 420 along the length direction to improve the uniformity of the powder. Of course, the stirring member may be a spiral rod, or other components having the function of loosening the powder, and the embodiment of the utility model is not limited to this.

[0036] Furthermore, the first powder receiving mechanism 400 may also include a driving member and a powder baffle plate. The bottom of the first powder receiving bin 420 may be provided with a discharge port connected to the powder spreader 200. The powder baffle plate may be movably arranged at the bottom of the first powder receiving bin 420, and the driving member may be connected to the powder baffle plate. The driving member may drive the powder baffle plate to open or close the discharge port. In the specific working process, when the first powder receiving bin 420 is receiving powder, the driving member may drive the powder baffle plate to close. When the first powder receiving bin 420 is conveying powder to the powder spreader 200, the driving member may drive the powder baffle plate to open, so that the powder in the first powder receiving bin 420 is conveyed to the powder spreader 200. This method has a simple structure and is easy to operate, and can better realize the powder receiving and powder supplying functions of the first powder receiving bin 420.

[0037] Of course, in the above case, the powder adding mechanism 300, the first powder receiving bin 420 and the powder spreader 200 can be in the upper, middle and lower positions to facilitate the powder adding and powder receiving operations, and the first powder receiving bin 420 can move freely according to the specific situation.

[0038] In an optional embodiment, the area of ​​the bottom of the first powder receiving bin 420 toward the opening direction can be gradually increased, that is, the first powder receiving bin 420 can be a structure with a large top and a small bottom, and the opening of the first powder receiving bin 420 is the largest, so that while increasing the powder receiving area for easy powder receiving, it can also facilitate the cooperation with the powder adding mechanism 300. Of course, the above situation also facilitates the flow of powder materials, so as to better supply powder to the powder spreading device 200.

[0039] The 3D printing device disclosed in the embodiment of the utility model may further include a second powder receiving mechanism 500, which may be located on the other side of the working box 100, and the second powder receiving mechanism 500 is arranged opposite to the first powder receiving mechanism 400. This method can meet the needs of a 3D printing device with bidirectional powder spreading, that is, when the powder spreader 200 performs bidirectional powder spreading, powder will be pushed out from both ends it reaches. At this time, the second powder receiving mechanism 500 and the first powder receiving mechanism 400 can collect powder at both ends at the same time, thereby reducing the amount of raw materials used, improving the utilization rate of powder, and better solving the problem of a large amount of powder waste that is easily caused in the process of spreading powder in each layer.

[0040] Specifically, the second powder receiving mechanism 500 may include a second guide rail 510 and a second powder receiving bin 520. The second powder receiving bin 520 may be movably disposed on the second guide rail 510. The second guide rail 510 may be a lifting mechanism. The second powder receiving bin 520 may be lifted and lowered on the second guide rail 510 to meet different working conditions.

[0041] And the first powder receiving bin 420 can include two working states. When the second powder receiving bin 520 is in the first working state, the opening side of the second powder receiving bin 520 is sealed with the side edge of the working box 100, and the opening of the second powder receiving bin 520 is not higher than the side edge of the working box 100; that is, the second powder receiving bin 520 moves on the second guide rail 510, and stops when the second powder receiving bin 520 moves to a sealing fit with the side edge of the working box 100, and then the second powder receiving bin 520 can be used for material receiving, that is, it can receive the powder scraped out of the working box 100 by the powder spreader 200 during the powder spreading process.

[0042] When the second powder receiving bin 520 is in the second working state, the second powder receiving bin 520 can be connected with the powder spreading device 200. That is, the second powder receiving bin 520 moves on the second guide rail 510, and when the second powder receiving bin 520 moves to a preset position, the powder spreading device 200 moves to a position connected with the second powder receiving bin 520, and then the second powder receiving bin 520 can transport the powder to the powder spreading device 200.

[0043] Of course, except that the second powder receiving bin 520 is not connected to the powder adding mechanism 300, other functions and features are the same as those of the first powder receiving bin 420, and this embodiment of the utility model will not be described in detail.

[0044] In the embodiment disclosed in the present utility model, the powder adding mechanism 300 may include a powder adding bin 310 and a material equalizing component 320. The material equalizing component 320 may be arranged at the bottom of the powder adding bin 310. When the first powder receiving bin 420 is in the third working state, the first powder receiving bin 420 is connected with the powder adding bin 310, and at least part of the material equalizing component 320 may be in the first powder receiving bin 420. At this time, the material equalizing component 320 in the first powder receiving bin 420 can achieve the effect of equalizing the powder added to the first powder receiving bin 420, so as to facilitate the uniformity of powder feeding and improve the powder supply effect to the powder spreader 200.

[0045] Further, the material distribution assembly 320 may include a connecting plate 321 and a material distribution member 322, such as Figure 2 As shown, the material equalizing member 322 can be arranged at the bottom of the connecting plate 321, and a material hole 321a can be opened on the connecting plate 321. When the first powder receiving bin 420 is in the third working state, the connecting plate 321 can match the opening of the first powder receiving bin 420, so that the connecting plate 321 is equivalent to the cover of the first powder receiving bin 420 to prevent the powder from being lifted during the powder adding process, and the first powder receiving bin 420 and the powder adding bin 310 can be connected through the material hole 321a to allow the powder to flow between the two; at least part of the material equalizing member 322 can be in the first powder receiving bin 420. At this time, the material equalizing member 322 can transport the powder entering the first powder receiving bin 420 through the material hole 321a to various positions to facilitate the uniformity of powder feeding and improve the powder supply effect to the powder spreader 200.

[0046] Of course, in the above case, the material balancing member 322 can extend along the length direction of the first powder receiving bin 420 to improve the powder feeding uniformity. At the same time, the material balancing member 322 can achieve the material balancing effect by rotating, swinging, etc., and the embodiment of the utility model does not limit this.

[0047] In an optional embodiment, the material balancing member 322 may be a spiral rod, and the spiral rod may extend along the length direction of the first powder receiving bin 420. Such a material balancing member 322 has a simple structure, is easy to operate, and can achieve a good material balancing effect.

[0048] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A 3D printing device, characterized in that: The invention comprises a working box (100), a powder spreading device (200), a powder adding mechanism (300) and a first powder receiving mechanism (400), wherein the powder spreading device (200) is movably arranged on the working box (100), the first powder receiving mechanism (400) is located on a side of the working box (100) perpendicular to the moving direction of the powder spreading device (200), the first powder receiving mechanism (400) comprises a first guide rail (410) and a first powder receiving bin (420), the first powder receiving bin (420) is movably arranged on the first guide rail (410), and the first powder receiving bin (420) comprises three Working state, when the first powder receiving bin (420) is in the first working state, the side edge of the opening of the first powder receiving bin (420) is sealed with the side edge of the working box (100), and the opening of the first powder receiving bin (420) is not higher than the side edge of the working box (100); when the first powder receiving bin (420) is in the second working state, the first powder receiving bin (420) is in communication with the powder spreader (200); when the first powder receiving bin (420) is in the third working state, the first powder receiving bin (420) is in communication with the powder adding mechanism (300).

2. The 3D printing device according to claim 1, characterized in that: When the first powder receiving bin (420) is in a first working state, the opening of the first powder receiving bin (420) extends along the side edge of the working box (100), and both ends of the opening of the first powder receiving bin (420) exceed the side edge of the working box (100).

3. The 3D printing device according to claim 1, characterized in that: The first powder receiving mechanism (400) further comprises a stirring member, and the stirring member is movably disposed in the first powder receiving bin (420).

4. The 3D printing device according to claim 3, characterized in that: The first powder receiving mechanism (400) also includes a driving member and a powder baffle plate. A discharge port connected to the powder spreader (200) is provided at the bottom of the first powder receiving bin (420). The powder baffle plate is movably arranged at the bottom of the first powder receiving bin (420), and the driving member is connected to the powder baffle plate. The driving member drives the powder baffle plate to open or close the discharge port.

5. The 3D printing device according to claim 3, characterized in that: The area of ​​the bottom of the first powder receiving bin (420) gradually increases in the direction toward the opening.

6. The 3D printing device according to claim 1, characterized in that: It also includes a second powder receiving mechanism (500), which is located on the other side of the working box (100) and is arranged opposite to the first powder receiving mechanism (400). The second powder receiving mechanism (500) includes a second guide rail (510) and a second powder receiving bin (520). The second powder receiving bin (520) is movably arranged on the second guide rail (510), and the first powder receiving bin (420) includes two working states. When the second powder receiving bin (520) is in the first working state, the opening side of the second powder receiving bin (520) is sealed with the side edge of the working box (100), and the opening of the second powder receiving bin (520) is not higher than the side edge of the working box (100); when the second powder receiving bin (520) is in the second working state, the second powder receiving bin (520) is connected with the powder spreader (200).

7. The 3D printing device according to claim 1, characterized in that: The powder adding mechanism (300) comprises a powder adding bin (310) and a material distribution component (320), wherein the material distribution component (320) is arranged at the bottom of the powder adding bin (310), and when the first powder receiving bin (420) is in a third working state, the first powder receiving bin (420) is in communication with the powder adding bin (310), and at least a portion of the material distribution component (320) is in the first powder receiving bin (420).

8. The 3D printing device according to claim 7, characterized in that: The material distribution component (320) includes a connecting plate (321) and a material distribution piece (322). The material distribution piece (322) is arranged at the bottom of the connecting plate (321), and a material hole (321a) is opened on the connecting plate (321). When the first powder receiving bin (420) is in the third working state, the connecting plate (321) matches the opening of the first powder receiving bin (420), and the first powder receiving bin (420) is connected to the powder adding bin (310) through the material hole (321a), and at least a part of the material distribution piece (322) is in the first powder receiving bin (420).

9. The 3D printing device according to claim 8, characterized in that: The material distribution member (322) is a spiral rod, and the spiral rod extends along the length direction of the first powder receiving bin (420).

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