Molding sand recovery device and sand mold printer
By designing a molding sand recycling device and utilizing components such as vacuum conveyors and guide chutes, the problem of difficult molding sand transportation to the sand mold printer was solved, realizing the recycling and convenient separation of molding sand and reducing equipment costs.
Patent Information
- Application Number
- CN202423299385.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing technologies, the separated molding sand is difficult to transport to the sand mold printer, making it difficult to recycle.
A molding sand recycling device was designed, including a sand supply component and a recycling component. The device uses a second vacuum conveyor and a suction nozzle to suck up excess molding sand around the sand mold, and ensures smooth conveying through a guide chute and a vibrator. The first and third vacuum conveyors are combined to transport the molding sand to the sand mold printer.
It enables the convenient separation of excess molding sand from the mold and mixing it with new sand, realizing the recycling of molding sand, simplifying the sand conveying process, and reducing equipment costs.
Smart Images
Figure CN223833369U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of 3D printing equipment, and in particular to a molding sand recycling device and a sand mold printer. Background Technology
[0002] After a sand mold printer finishes printing a sand mold, the excess molding sand needs to be separated from the sand mold. In order to reduce the loss of molding sand, the separated molding sand needs to be recycled. However, the separated molding sand is difficult to transport to the sand mold printer, making it difficult to recycle. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a molding sand recycling device and a sand mold printer.
[0004] The molding sand recovery device according to a first aspect embodiment of the present invention includes:
[0005] A sand supply assembly includes a sand storage tank and a first hopper. The first hopper is equipped with a stirring mechanism. The sand storage tank is equipped with a sand outlet located above the first hopper. The first hopper is equipped with a first sand outlet, which is connected to a first feeding mechanism for conveying sand to a sand mold printer.
[0006] The recycling assembly includes a suction nozzle and a second vacuum conveyor, wherein a hose is connected between the suction nozzle and the conveying inlet of the second vacuum conveyor, and the conveying outlet of the second vacuum conveyor is located above the first hopper.
[0007] According to the first aspect of the present invention, the molding sand recycling device has at least the following technical effects: when in use, the second vacuum conveyor can be started, and then the suction nozzle can be brought close to the printed sand mold to suck up the excess molding sand around the sand mold, so as to separate the excess molding sand from the sand mold; the molding sand sucked by the second vacuum conveyor can be transported to the first hopper, mixed with new molding sand, and then transported to the sand mold printer to achieve the purpose of recycling molding sand.
[0008] According to some embodiments of the present invention, the recycling assembly further includes a downwardly inclined guide trough, which is located between the conveying outlet of the second vacuum conveyor and the first hopper.
[0009] According to some embodiments of the present invention, the feed trough is equipped with a vibrator.
[0010] According to some embodiments of this utility model, the vibrator is a vibration motor.
[0011] According to some embodiments of the present invention, the first feeding mechanism includes a first vacuum conveyor, and the first sand outlet is connected to the conveying inlet of the first vacuum conveyor.
[0012] According to some embodiments of the present invention, the first sand outlet is located at the bottom of the side wall of the first hopper, and the stirring mechanism includes a stirring shaft and a stirring motor. The stirring shaft passes through the bottom wall of the first hopper vertically and is connected to the stirring motor.
[0013] According to a second aspect of the present invention, a sand mold printer includes a printer body and the aforementioned molding sand recycling device. The printer body has a sand inlet, which is connected to the conveying outlet of the first feeding mechanism.
[0014] According to the second aspect of the present invention, the sand mold printer has at least the following technical effects: by setting the above-mentioned molding sand recycling device, it is not only convenient to separate excess molding sand from the finished sand mold, but also to mix the separated molding sand with new molding sand and then transport it to the printer body for continued use.
[0015] According to some embodiments of the present invention, the printer body has a recycling hopper, the recycling hopper is provided with a second sand outlet, and a third feeding mechanism is connected between the second sand outlet and the first hopper.
[0016] According to some embodiments of the present invention, the third feeding mechanism includes a third vacuum conveyor, the second sand outlet is connected to the conveying inlet of the third vacuum conveyor, and the conveying outlet of the second vacuum conveyor is located above the first hopper.
[0017] According to some embodiments of the present invention, the third feeding mechanism includes a second connecting pipe, which is connected between the second sand outlet and the conveying inlet of the second vacuum conveyor.
[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0020] Figure 1 This is a schematic diagram of the structure of the sand mold printer according to an embodiment of the present invention;
[0021] In the attached image:
[0022] 100-Sand storage box; 110-Sand outlet valve; 200-First hopper; 201-First sand outlet; 210-Agitator shaft; 220-Agitator motor; 230-First connecting pipe; 231-First valve; 300-Second vacuum conveyor; 310-Hose; 311-Suction nozzle; 320-Second connecting pipe; 321-Second valve; 330-Stop valve; 400-Guide chute; 410-Vibration motor; 500-Printer body; 510-Sand inlet; 511-First vacuum conveyor; 520-Recovery hopper. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0026] The following is for reference. Figure 1 This invention describes a sand recycling device and a sand pattern printer according to embodiments of the present invention.
[0027] The molding sand recovery device according to the first aspect of this utility model includes a sand supply component and a recovery component.
[0028] The sand supply assembly includes a sand storage tank 100 and a first hopper 200. The sand storage tank 100 is used to replenish new molding sand. The sand storage tank 100 is located above the first hopper 200. The sand storage tank 100 has a sand outlet located at the bottom of the sand storage tank 100. The sand outlet has a sand discharge valve 110 to control the opening or closing of the sand outlet, thereby controlling whether sand falls from the sand outlet. The sand discharge valve 110 can be a solenoid valve. The sand outlet is located above the first hopper 200. The top of the first hopper 200 is open so that the molding sand falling from the sand outlet can fall into the first hopper 200. The first hopper 200 has a stirring mechanism that can evenly mix the new molding sand with the recycled molding sand. The first hopper 200 has a first sand outlet 201, which is connected to a first feeding mechanism for conveying the sand to the sand mold printer.
[0029] The recycling assembly includes a suction nozzle 311 and a second vacuum conveyor 300. A hose 310 is connected between the suction nozzle 311 and the inlet of the second vacuum conveyor 300. The vacuum conveyor can create a negative pressure at its inlet to suck up sand and send the sucked sand out from its outlet. The vacuum conveyor is a conventional component in the field and can be purchased directly from the market. Its specific structure will not be described in detail here. The suction nozzle 311 is tubular and can be used to suck up excess molding sand around the finished sand mold. The suction nozzle 311 has a suction end and a connecting end. One end of the hose 310 is connected to the connecting end, and the other end of the hose 310 is connected to the inlet of the second vacuum conveyor 300. The outlet of the second vacuum conveyor 300 is located above the first hopper 200.
[0030] When in use, the second vacuum conveyor 300 can be started, and then the suction nozzle 311 can be brought close to the printed sand mold to suck up the excess molding sand around the sand mold, so as to separate the excess molding sand from the sand mold. The molding sand sucked up by the second vacuum conveyor 300 can be transported to the first hopper 200, mixed with new molding sand, and then transported to the sand mold printer to achieve the purpose of recycling molding sand.
[0031] It is understandable that sand molds may have various irregular structures, making it difficult to separate excess molding sand from the surrounding area using ordinary tools. This embodiment, by incorporating a second vacuum conveyor 300 and a first hopper 200, can separate excess molding sand through negative pressure suction. This facilitates both the separation of excess molding sand and the mixing and recycling of the separated sand with new molding sand. The flexible hose 310 facilitates the suction of molding sand from the surrounding area of the sand mold from various angles.
[0032] In some embodiments of this utility model, the recycling assembly further includes a downwardly extending guide chute 400, which is located between the conveying outlet of the second vacuum conveyor 300 and the first hopper 200. The conveying outlet of the second vacuum conveyor 300 is located at its bottom, and the top of the guide chute 400 is located below the second vacuum conveyor 300, allowing the molding sand discharged from the conveying outlet of the second vacuum conveyor 300 to fall into the guide chute 400. The guide chute 400 extends downwardly from below the second vacuum conveyor 300, allowing the molding sand falling from the conveying outlet of the second vacuum conveyor 300 to be conveyed along the guide chute 400 under the action of gravity. The lower end of the guide chute 400 is located at the first hopper 200. The second vacuum conveyor 300 is positioned either inside or directly above the first hopper 200, allowing the molding sand fed from the lower end of the guide chute 400 to fall into the first hopper 200. By setting the guide chute 400, the installation position of the second vacuum conveyor 300 is not restricted to directly above the first hopper 200, allowing the second vacuum conveyor 300 to be positioned diagonally above the first hopper 200. This avoids the problem of the second vacuum conveyor 300 being too close to the sand storage box 100, leaving sufficient space for subsequent inspection and maintenance during production.
[0033] In some embodiments of this utility model, the feed chute 400 is equipped with a vibrator. It should be noted that the molding sand recovered from around the sand mold is molding sand mixed with a curing agent, not completely dry sand particles. When the recovered molding sand is conveyed along the feed chute 400, it may aggregate to form sand lumps and adhere to the inner wall of the feed chute 400, resulting in uneven conveying. In this embodiment, by setting a vibrator, the feed chute 400 can be vibrated, which helps to make the conveying smooth.
[0034] In some embodiments of this utility model, the vibrator is a vibration motor 410. The vibration motor 410 can be set at the bottom of the guide trough 400, which makes the structure simple and the installation easy.
[0035] In some embodiments of this utility model, the first feeding mechanism includes a first vacuum conveyor 511, and a first sand outlet 201 is connected to the conveying inlet of the first vacuum conveyor 511. In use, the first vacuum conveyor 511 can be set at a higher position so that the molding sand can be conveyed to a higher position so that the molding sand can fall into the sand inlet 510 of the sand mold printer.
[0036] In some embodiments of this utility model, the first sand outlet 201 is located at the bottom of the side wall of the first hopper 200. The stirring mechanism includes a stirring shaft 210 and a stirring motor 220. The stirring shaft 210 passes vertically through the bottom wall of the first hopper 200 and is connected to the stirring motor 220. Since the first feeding mechanism is a first vacuum conveyor 511, which can use negative pressure to suck up the molding sand in the first hopper 200, the first sand outlet 201 does not need to be located at the bottom of the first hopper 200 to leave space for the stirring shaft 210. In this way, the stirring shaft 210 can extend into the first hopper 200 from the bottom. The part of the stirring shaft 210 located inside the first hopper 200 is provided with stirring blades to stir the molding sand in the first hopper 200. Therefore, the stirring mechanism does not need to occupy the space above the first hopper 200, and the stirring mechanism will not block the molding sand falling from above the first hopper 200.
[0037] The sand mold printer of the second aspect of this utility model includes a printer body 500 and the aforementioned molding sand recycling device. The printer body 500 has a sand inlet 510, which is connected to the conveying outlet of the first feeding mechanism. The printer body 500 of the sand mold printer is a conventional device in the art, and its specific structure will not be described in detail here. The sand inlet 510 can be set at the top of the printer body 500, and the first vacuum conveyor 511 is set above the sand inlet 510, so that the molding sand delivered from the first vacuum conveyor 511 can fall into the sand inlet 510. By setting the aforementioned molding sand recycling device, it is convenient to separate excess molding sand from the finished sand mold, and the separated molding sand can be mixed with new molding sand and then conveyed to the printer body 500 for continued use.
[0038] In some embodiments of this utility model, the printer body 500 has a recycling hopper 520, which is provided with a second sand outlet. A third feeding mechanism is connected between the second sand outlet and the first hopper 200. It is understood that when the sand mold printer spreads the molding sand, some of the molding sand will be scraped into the recycling hopper 520; in this embodiment, by setting the third feeding mechanism, the molding sand in the recycling hopper 520 can also be transported to the first hopper 200 for continued use.
[0039] In some embodiments of this utility model, the third feeding mechanism includes a third vacuum conveyor, the second sand outlet is connected to the conveying inlet of the third vacuum conveyor, and the conveying outlet of the second vacuum conveyor 300 is located above the first hopper 200. The third vacuum conveyor can suck up the molding sand from the second sand outlet and convey it to the first hopper 200, realizing the recycling and reuse of the molding sand.
[0040] In some embodiments of this utility model, the third feeding mechanism includes a second connecting pipe 320, which is connected between the second sand outlet and the conveying inlet of the second vacuum conveyor 300. Thus, the recovery of molding sand from around the printed sand mold and from the recovery hopper 520 are both handled by the second vacuum conveyor 300, eliminating the need for an additional third vacuum conveyor, resulting in a simpler structure and reduced equipment costs. The second sand outlet is equipped with a main feed pipe, and two feed branch pipes are located at the end of the main feed pipe furthest from the second sand outlet. These two feed branch pipes are respectively connected to the second connecting pipe 320 and the flexible hose 310. Each feed branch pipe is equipped with a shut-off valve 330. By controlling the two shut-off valves 330, one feed branch pipe can be shut off, allowing the suction force of the other feed branch pipe to be increased.
[0041] In some embodiments of this utility model, the second sand outlet is located at the bottom of the recycling hopper 520, and the wall of the second connecting pipe 320 is provided with a second bypass port. The second bypass port is provided with a second valve 321, which can be an electrically controlled valve. The second valve 321 is used to control the opening or closing of the second bypass port. The second bypass port is located on the side of the second connecting pipe 320 near the second sand outlet. In this way, when there is a lot of molding sand in the second connecting pipe 320 and the resistance is high, the second bypass port can be opened to draw in air, promote the conveying of molding sand in the second connecting pipe 320, and avoid the problem of blockage. Similarly, a first connecting pipe 230 is connected between the first sand outlet 201 and the conveying inlet of the first vacuum conveyor 511. The side wall of the first connecting pipe 230 is provided with a first bypass port, and the first bypass port is provided with a first valve 231, which can be an electrically controlled valve. The first valve 231 is used to control the opening or closing of the first bypass port.
[0042] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A molding sand recycling device, characterized in that, include: The sand supply assembly includes a sand storage tank (100) and a first hopper (200). The first hopper (200) is equipped with a stirring mechanism. The sand storage tank (100) is equipped with a sand outlet located above the first hopper (200). The first hopper (200) is equipped with a first sand outlet (201). The first sand outlet (201) is connected to a first feeding mechanism for conveying sand to a sand mold printer. The recycling assembly includes a suction nozzle (311) and a second vacuum conveyor (300), wherein a hose (310) is connected between the suction nozzle (311) and the conveying inlet of the second vacuum conveyor (300), and the conveying outlet of the second vacuum conveyor (300) is located above the first hopper (200).
2. The molding sand recovery device according to claim 1, characterized in that: The recycling assembly also includes a downwardly inclined guide chute (400) located between the conveying outlet of the second vacuum conveyor (300) and the first hopper (200).
3. The molding sand recovery device according to claim 2, characterized in that: The feed trough (400) is equipped with a vibrator.
4. The molding sand recovery device according to claim 3, characterized in that: The vibrator is a vibration motor (410).
5. The molding sand recovery device according to claim 1, characterized in that: The first feeding mechanism includes a first vacuum conveyor (511), and the first sand outlet (201) is connected to the conveying inlet of the first vacuum conveyor (511).
6. The molding sand recovery device according to claim 5, characterized in that: The first sand outlet (201) is located at the bottom of the side wall of the first hopper (200). The stirring mechanism includes a stirring shaft (210) and a stirring motor (220). The stirring shaft (210) passes through the bottom wall of the first hopper (200) vertically and is connected to the stirring motor (220).
7. A sand mold printer, characterized in that: The device includes a printer body (500) and a molding sand recycling device as described in any one of claims 1 to 6, wherein the printer body (500) has a sand inlet (510) connected to the conveying outlet of the first feeding mechanism.
8. The sand mold printer according to claim 7, characterized in that: The printer body (500) has a recycling hopper (520), the recycling hopper (520) is provided with a second sand outlet, and a third feeding mechanism is connected between the second sand outlet and the first hopper (200).
9. The sand mold printer according to claim 8, characterized in that: The third feeding mechanism includes a third vacuum conveyor, the second sand outlet is connected to the conveying inlet of the third vacuum conveyor, and the conveying outlet of the second vacuum conveyor (300) is located above the first hopper (200).
10. The sand mold printer according to claim 8, characterized in that: The third feeding mechanism includes a second connecting pipe (320), which is connected between the second sand outlet and the conveying inlet of the second vacuum conveyor (300).