Feeding device and three-dimensional printing system

Abstract

The utility model discloses a feeding device and a three-dimensional printing system, relates to the technical field of printing equipment, and mainly aims to prevent backflow resin from polluting a gas driving mechanism. According to the main technical scheme, the feeding device is applied to the three-dimensional printer and comprises a gas driving part, and the gas driving part comprises a gas blowing opening and a gas extraction opening; the container is communicated with the air blowing port and is used for storing resin so as to provide the resin for the three-dimensional printer when the air blowing port blows out the air; and the surge bin is respectively communicated with the extraction opening and the container, so that gas in the container is sucked into the surge bin when the extraction opening sucks gas.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a feeding device and a three-dimensional printing system. Background Art

[0002] In recent years, 3D printers have developed rapidly, especially light-curing 3D printers, which are widely used.

[0003] A photocurable 3D printer generally includes a feeding device, which generally blows gas into a resin container through a gas drive mechanism to squeeze out the resin in the container, so as to feed the material into the printer cartridge. After the feeding is completed, the resin is easily left in the feeding tube connected to the container. In order to avoid the residual resin affecting the feeding accuracy, the residual resin is usually pumped back into the resin container. For example, the patent with the publication number CN112721166A discloses a feeding device and a 3D printing device, and specifically discloses a material tank, a driving device and a conveying device. The driving device is connected to a container with resin liquid inside through the conveying device, and the inside of the container is also connected to the material tank through the conveying device. If the height of the resin liquid in the material tank is lower than the first preset height, the driving device inputs gas into the container through the conveying device, so that the resin liquid in the container is transported to the material tank through the conveying device. When the feeding is stopped, the driving device is controlled to extract the gas in the container, so that the resin liquid in the material tank or the residual resin liquid in the second connecting tube of the conveying device flows back to the container.

[0004] If an error occurs during the process of extracting the residual resin, such as the resin container tipping over, the resin may easily flow back into the gas drive mechanism, causing contamination to the mechanism, possibly causing damage to the machine and inconvenience in use.

[0005] Therefore, how to prevent misoperation during the process of withdrawing residual resin has become a demand of the prior art. Utility Model Content

[0006] In view of this, an embodiment of the utility model provides a feeding device and a three-dimensional printing system, the main purpose of which is to prevent the backflow of resin from contaminating the gas drive mechanism.

[0007] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0008] On the one hand, an embodiment of the utility model provides a feeding device for a three-dimensional printer, comprising:

[0009] A gas driving part, the gas driving part comprises an air blowing port and an air suction port, the air blowing port is used for blowing air, and the air suction port is used for inhaling air;

[0010] A container, the container is in communication with the air blowing port and is used to store resin so as to provide resin to the three-dimensional printer when the air blowing port blows out gas;

[0011] The buffer bin is connected to the air suction port and the container respectively, so that the gas in the container is sucked into the buffer bin when the air suction port sucks air.

[0012] Furthermore, a vent is provided on the top of the buffer bin, and the vent is connected to the air extraction port and the container.

[0013] Furthermore, the buffer bin comprises a cover body and a bin body with an opening at the top, and the cover body is arranged to cover the opening;

[0014] The cover body is detachably connected to the bin body;

[0015] The vent is arranged on the cover.

[0016] Furthermore, a sealing member is provided between the cover body and the bin body.

[0017] Furthermore, a reinforcement part is provided on the warehouse body and / or the cover body, and the reinforcement part is used to strengthen the strength of the warehouse body and / or the cover body.

[0018] Further, the gas driving part includes a diaphragm pump and a first valve, and the diaphragm pump includes the air suction port and the air blowing port;

[0019] The vent includes a first vent and a second vent; the first vent is connected to the air extraction port through the first valve, and the first valve is used to control the on and off of the air flow between the air extraction port and the first vent; the second vent is connected to the container.

[0020] Furthermore, the gas driving unit also includes a second valve, and the diaphragm pump also includes the blowing port, the blowing port is connected to the container through the second valve, the second valve is used to control the on and off of the air flow between the blowing port and the container, and the gas driving unit is used to allow gas to enter the container to discharge the resin in the container.

[0021] Further, the vent further comprises a third vent;

[0022] The second valve is communicated with the third vent and the air blowing port respectively, so that the air blowing port is communicated with the container through the second valve and the buffer bin, and the second valve is used to control the on-off of the air flow between the air blowing port and the buffer bin.

[0023] Furthermore, the feeding device also includes a shell, and the buffer bin is vertically arranged in the shell so that the vent is always located at the top of the buffer bin.

[0024] On the other hand, an embodiment of the present utility model further provides a three-dimensional printing system, including a three-dimensional printer and the aforementioned feeding device.

[0025] By means of the above technical solution, the utility model has at least the following beneficial effects:

[0026] The technical solution provided by the embodiment of the utility model connects the buffer bin between the air suction port of the gas drive unit and the container for storing resin, so that when the residual resin in the pipeline of the container is subsequently added to the 3D printer after the residual resin is withdrawn from the container, the gas drive unit can suck the gas in the container into the buffer bin and then enter the gas drive unit. If the resin is withdrawn from the container, the refluxed resin can be stored in the buffer bin and will not directly enter the gas drive unit, which effectively avoids the contamination of the gas drive unit by the refluxed resin and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a feeding device provided in an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of an explosion of a buffer bin in a feeding device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be described in more detail below in conjunction with the accompanying drawings in the preferred embodiments of the present invention.

[0030] like Figure 1 As shown, the embodiment of the utility model provides a feeding device for a three-dimensional printer, including a gas driving part 1, a container 2 and a buffer bin 3. The gas driving part 1 includes a blowing port 15 and a suction port 11. The blowing port 15 is used for blowing air, and the suction port 11 is used for inhaling air. The container 2 is connected with the blowing port 15, used for storing resin, and connected with the material box 100 of the three-dimensional printer, so as to provide resin to the material box 100 of the three-dimensional printer when the blowing port 15 blows out gas. The buffer bin 3 is connected with the suction port 11 and the container 2 respectively, so as to suck the gas in the container 2 into the buffer bin 3 when the suction port 11 inhales air, so as to realize the extraction of residual material in the pipeline between the container 2 and the material box 100. Among them, the gas driving part 1 can be a device that can both extract and blow air, such as a diaphragm pump or an air pump.

[0031] The feeding device provided by the embodiment of the utility model connects the buffer bin 3 between the air suction port 11 of the gas driving part 1 and the container 2 for storing resin, so that when the residual resin in the pipeline of the container 2 is subsequently sucked back to add resin to the 3D printer, the gas driving part 1 can suck the gas in the container 2 into the buffer bin 3, and then enter the gas driving part 1. If the resin is sucked back from the container 2, the refluxed resin can be stored in the buffer bin 3 and will not directly enter the gas driving part 1, which effectively avoids the contamination of the gas driving part 1 by the refluxed resin, and is safer to use.

[0032] In order to more effectively prevent the reflow resin from contaminating the gas drive unit 1, in the embodiment of the utility model, see Figure 1 A vent is provided on the top of the buffer bin 3 , and the vent is connected to the air extraction port 11 and the container 2 .

[0033] In the above embodiment, since the vent of the buffer bin 3 is located at the top of the buffer bin 3, that is, the buffer bin 3 is vertically arranged, after the reflow resin is stored in the buffer bin 3, it is not easy to flow out of the buffer bin 3, thereby ensuring that the reflow resin in the buffer bin 3 will not flow out of the buffer bin 3, thereby more effectively preventing the reflow resin from contaminating the gas drive part 1.

[0034] Specifically, the gas drive unit 1 and the buffer bin 3 can be installed together in a shell, and the buffer bin 3 can be vertically fixed on the inner wall of the shell so that the air vent of the buffer bin 3 is always located at the top of the bin body, and the buffer bin 3 can be prevented from tipping over.

[0035] In order to facilitate the maintenance of the buffer bin 3, in the embodiment of the utility model, see Figure 1 and Figure 2 The buffer bin 3 includes a cover body 31 and a bin body 32 with an opening at the top. The cover body 31 is detachably covered on the opening of the bin body 32 ; the vent is arranged on the cover body 31 .

[0036] In the above embodiment, since the bin body 32 and the cover body 31 of the buffer bin 3 are detachably connected, after the buffer bin 3 has been used for a long time, if a large amount of resin is stored in the bin body 32, the cover body 31 can be removed from the bin body 32 and the bin body 32 can be cleaned to prevent the buffer bin 3 from storing too much resin and causing the resin to flow back to the gas drive unit 1, thereby more effectively preventing the refluxed resin from contaminating the gas drive unit 1.

[0037] Of course, the bin body 32 and the cover body 31 can also be integrally formed and connected, and the specific selection can be made according to the actual use situation, and this application does not limit it. If the bin body 32 and the cover body 31 are integrally formed, a device for extracting resin from the bin body can also be provided to prevent excessive resin in the bin body 32, and this application will not further explain it.

[0038] There may be a variety of detachable connection methods between the bin body 32 and the cover body 31 , for example, the two may be connected by bolts or snaps.

[0039] In the present utility model embodiment, see Figure 2 A sealing member 33 is provided between the cover body 31 and the bin body 32 so that the sealing member 33 seals the buffer bin 3 to prevent air leakage in the buffer bin 3, thereby ensuring smooth resin withdrawal.

[0040] Specifically, the seal 33 can have various structural forms, for example, the seal 33 can be a sealing ring, a groove is provided around the opening of the bin body 32, and the sealing ring can be arranged in the groove; or the seal 33 can be a sealing gasket, the sealing gasket is sandwiched between the bin body 32 and the cover body 31, and a through hole is provided on the sealing gasket at a position corresponding to the vent. The seal 33 can be made of elastic material such as silicone or rubber.

[0041] In the present utility model embodiment, see Figure 2 A reinforcing portion 321 is provided on the bin body 32 and / or the cover body 31 , and the reinforcing portion 321 is used to strengthen the strength of the bin body 32 and / or the cover body 31 .

[0042] In the above embodiment, the reinforcing portion 321 can strengthen the strength of the bin body 32 and / or the cover body 31, thereby preventing the buffer bin 3 from deforming and affecting the sealing of the buffer bin 3, thereby better ensuring the smooth progress of the resin withdrawal work.

[0043] Specifically, the reinforcing portion 321 may have various structural forms, for example, the reinforcing portion 321 may include a plurality of first reinforcing ribs, which may be arranged at intervals along the circumference of the bin body 32; and / or, a plurality of second reinforcing ribs may be arranged at intervals along the length direction of the cover body 31. It is understood that the reinforcing portion 321 may be located inside the bin body 32, or located on the side of the cover body 31 facing the inside of the bin body 32.

[0044] In the present utility model embodiment, see Figure 1 and Figure 2 The gas driving part 1 includes a diaphragm pump 12 and a first valve 13. The diaphragm pump 12 includes the aforementioned air suction port 11 and air blowing port 15. The air vent includes a first air vent 311 and a second air vent 312. The first air vent 311 is connected to the air suction port 11 through the first valve 13. The first valve 13 is used to control the on-off of the airflow between the air suction port 11 and the first air vent 311. The second air vent 312 is connected to the container 2.

[0045] In the above embodiment, when the feeding is completed, the first valve 13 can be opened, and the diaphragm pump 12 can suck air and inhale the gas in the container 2 into the buffer bin 3 to drive the residual resin in the feed pipe to flow back into the container 2, thereby realizing the extraction of the residual resin and avoiding waste of resin.

[0046] In order to avoid damage to the diaphragm pump 12, in the embodiment of the utility model, see Figure 1 Shock absorbers 121 may be provided at both ends of the diaphragm pump 12, respectively. Specifically, the shock absorber 121 may include an elastic shock absorbing ring sleeved on the corresponding end of the diaphragm pump 12, so that the diaphragm pump 12 can be adjacent to or abut against other components through the shock absorbing ring, thereby buffering the vibration generated by the diaphragm pump 12 during operation through the shock absorbing ring, avoiding damage to the diaphragm pump 12, and extending its service life. At the same time, it can also reduce the impact of the vibration generated by the diaphragm pump 12 during operation on other components.

[0047] In the present utility model embodiment, see Figure 1 The gas driving unit 1 also includes a second valve 14, and the air port 15 is connected to the container 2 through the second valve 14. The second valve 14 is used to control the on-off of the air flow between the air port 15 and the container 2. The gas driving unit 1 is used to blow air into the container 2 through the air port 15 to discharge the resin stored in the container 2, thereby achieving the purpose of feeding the resin box.

[0048] In the above embodiment, when feeding, the second valve 14 can be opened and the first valve 13 can be closed at the same time. The diaphragm pump 12 blows air through the blowing port 15 so that the gas enters the container 2 through the second valve 14 and squeezes the resin in the container 2 to discharge the resin into the resin box 100 of the 3D printer, thereby realizing automatic feeding.

[0049] Specifically, the first valve 13 and the second valve 14 can both be solenoid valves, such as micro solenoid valves, and both can be electrically connected to an additional control system or a control system of a 3D printer so that the control system can control the opening or disconnection of the first valve 13 and the second valve 14.

[0050] Among them, in order to ensure the feeding accuracy of the feeding device, the feeding device can also include a detection module for detecting the liquid level of the resin in the resin box 100 and electrically connected to the control system, such as a liquid level sensor or a weight sensor, so that during the feeding process, the detection module can detect the amount of resin in the box 100 in real time. When the detection module detects that the amount of resin in the box 100 does not reach the required amount, the control system controls the second valve 14 to open and the first valve 13 to close to continue feeding; when the amount of resin reaches the required amount, the control system controls the second valve 14 to close and the first valve 13 to open to stop feeding, thereby ensuring the feeding accuracy and realizing the withdrawal of residual materials at the same time.

[0051] In the present utility model embodiment, see Figure 1 and Figure 2 The vent also includes a third vent 313; the second valve 14 is connected to the third vent 313 and the blowing port 15 respectively, so that the blowing port 15 is connected to the container 2 through the second valve 14 and the buffer bin 3, and the second valve 14 is used to control the on-off of the air flow between the blowing port 14 and the buffer bin 3. When feeding, after opening the second valve 14, the diaphragm pump 12 blows air through the blowing port 15, so that the gas passes through the second valve 14 and the buffer bin 3 into the container 2, and squeezes the resin in the container 2 to discharge the resin into the resin material box 100 of the 3D printer, so as to realize automatic feeding.

[0052] As mentioned above, the gas drive unit 1 can be installed as a whole in the shell. In the above embodiment, by connecting the second valve 14 with the buffer bin 3, the blowing port 15 is connected with the container 2 through the buffer bin 3. In this way, there is only one pipeline connected to the container 2 outside the shell, thereby simplifying the pipeline structure outside the shell, and then simplifying the structure of the feeding device, which is more convenient to use.

[0053] In the present utility model embodiment, see Figure 1 and Figure 2 The feeding device also includes a first pipeline 16, a second pipeline 17 and a third pipeline 18. The first air vent 311 is connected to the first valve 13 through the first pipeline 16, and the shape and size of the first air vent 311 are matched with the shape and size of the interface of the first pipeline 16; the second air vent 312 is connected to the container 2 through the second pipeline 17, and the shape and size of the second air vent 312 are matched with the shape and size of the interface of the second pipeline 17; the third air vent 313 is connected to the second valve 14 through the third pipeline 18, and the shape and size of the third air vent 313 are matched with the shape and size of the interface of the third pipeline 18.

[0054] In the above embodiment, since the thickness of the pipeline connecting the container 2 and the pipeline connecting the solenoid valve may be different, the shapes and sizes of the first air vent 311, the second air vent 312 and the third air vent 313 may be different, that is, the three are respectively adapted to the shapes and sizes of the pipelines connected thereto, so that when assembling, the operator can quickly identify which pipeline the current air vent should be connected to according to the different shapes and sizes of each vent. This not only avoids assembly errors and makes the operation more convenient and quick, but also ensures the sealing of the connection after the components are adapted and connected.

[0055] The embodiment of the utility model further provides a three-dimensional printing system, including a three-dimensional printer and the aforementioned feeding device.

[0056] The three-dimensional printing system provided by the embodiment of the utility model includes a feeding device, which connects the buffer bin 3 between the air suction port 11 of the gas driving part 1 and the container 2 for storing resin, so that when the residual resin in the pipeline of the container is subsequently added to the three-dimensional printer after the resin is withdrawn, the gas driving part 1 can suck the gas in the container 2 into the buffer bin 3, and then enter the gas driving part 1. If the resin is withdrawn from the container, the refluxed resin can be stored in the buffer bin 3 and will not directly enter the gas driving part 1, which effectively avoids the contamination of the gas driving part 1 by the refluxed resin, and is safer to use.

[0057] The embodiment of the utility model provides a feeding device for a three-dimensional printer, comprising a gas driving part 1, the gas driving part 1 comprising a blowing port 15 and a suction port 11, the blowing port 15 is used for blowing, and the suction port 11 is used for sucking; a container 2, which is connected to the blowing port 15, is used to store resin, so as to provide resin to the three-dimensional printer when the blowing port 15 blows out gas; a buffer bin 3, which is respectively connected to the suction port 11 and the container 2, so as to suck the gas in the container 2 into the buffer bin 3 when the suction port 11 sucks air. A vent is provided at the top of the buffer bin 3, and the vent is connected to the suction port 11 and the container 2. The buffer bin 3 comprises a cover body 31 and a bin body 32 with an opening at the top, the cover body 31 is covered at the opening of the bin body 32; the cover body 31 and the bin body 32 are detachably connected; and the vent is provided on the cover body 31. A sealing member 33 is provided between the cover body 31 and the bin body 32, so that the sealing member 33 seals the buffer bin 3. The chamber body 32 and / or the cover body 31 are provided with a reinforcement part 321, which is used to strengthen the strength of the chamber body 32 and / or the cover body 31. The gas drive unit 1 includes a diaphragm pump 12 and a first valve 13. The diaphragm pump 12 includes an air suction port 11 and an air blowing port 15. The air vents include a first air vent 311 and a second air vent 312. The first air vent 311 is connected to the air suction port 11 through the first valve 13. The first valve 13 is used to control the on-off of the air flow between the air suction port 11 and the first air vent 311. The second air vent 312 is connected to the container 2. The gas drive unit 1 also includes a second valve 14. The diaphragm pump 12 also includes an air blowing port 15. The air blowing port 15 is connected to the container 2 through the second valve 14. The second valve 14 is used to control the on-off of the air flow between the air blowing port 15 and the container 2. The gas drive unit 1 is used to blow air into the container 2 through the air blowing port 15 to discharge the resin stored in the container 2. The vent also includes a third vent 313; the second valve 14 is connected to the third vent 313 and the blowing port 15 respectively, so that the blowing port 15 is connected to the container 2 through the second valve 14 and the buffer bin 3, and the second valve 14 is used to control the on and off of the air flow between the blowing port 15 and the buffer bin 3. The feeding device also includes a shell, and the buffer bin 3 is vertically arranged in the shell so that the vent is always located at the top of the buffer bin 3. The embodiment of the utility model also provides a three-dimensional printing system, including a three-dimensional printer and the aforementioned feeding device.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A feeding device, applied to a 3D printer, characterized in that: include: A gas driving part (1), the gas driving part (1) comprising an air blowing port (15) and an air suction port (11), the air blowing port (15) being used for blowing air, and the air suction port (11) being used for inhaling air; a container (2), the container (2) being in communication with the air blowing port (15) and being used for storing resin so as to provide the resin to the three-dimensional printer when the air blowing port (15) blows out gas; A buffer bin (3), wherein the buffer bin (3) is respectively connected to the air suction port (11) and the container (2), so that when the air suction port (11) inhales air, the gas in the container (2) is sucked into the buffer bin (3).

2. The feeding device according to claim 1, characterized in that: The top of the buffer bin (3) is provided with a vent, and the vent is in communication with the air extraction port (11) and the container (2).

3. The feeding device according to claim 2, characterized in that: The buffer bin (3) comprises a cover body (31) and a bin body (32) having an opening at the top, wherein the cover body (31) is arranged to cover the opening; The cover body (31) is detachably connected to the bin body (32); The vent is arranged on the cover body (31).

4. The feeding device according to claim 3, characterized in that: A sealing member (33) is provided between the cover body (31) and the bin body (32).

5. The feeding device according to claim 3, characterized in that: A reinforcing portion (321) is provided on the warehouse body (32) and / or the cover body (31), and the reinforcing portion (321) is used to strengthen the strength of the warehouse body (32) and / or the cover body (31).

6. The feeding device according to claim 2, characterized in that: The gas drive unit (1) comprises a diaphragm pump (12) and a first valve (13), and the diaphragm pump (12) comprises the air suction port (11) and the air blowing port (15); The vent comprises a first vent (311) and a second vent (312); the first vent (311) is connected to the air extraction port (11) via the first valve (13), and the first valve (13) is used to control the on / off of the air flow between the air extraction port (11) and the first vent (311); the second vent (312) is connected to the container (2).

7. The feeding device according to claim 6, characterized in that: The gas driving part (1) further comprises a second valve (14), the air blowing port (15) is connected to the container (2) via the second valve (14), the second valve (14) is used to control the on-off of the air flow between the air blowing port (15) and the container (2), and the gas driving part (1) is used to allow the gas to enter the container (2) so as to discharge the resin in the container (2).

8. The feeding device according to claim 7, characterized in that: The vent further comprises a third vent (313); The second valve (14) is connected to the third vent (313) and the air blowing port (15) respectively, so that the air blowing port (15) is connected to the container (2) through the second valve (14) and the buffer bin (3). The second valve (14) is used to control the on / off of the air flow between the air blowing port (15) and the buffer bin (3).

9. The feeding device according to claim 2, characterized in that: Also includes: The buffer bin (3) is vertically arranged in the shell so that the vent is always located at the top of the buffer bin (3).

10. A three-dimensional printing system, characterized in that: include: A three-dimensional printer and a feeding device as claimed in any one of claims 1 to 9.

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