Metal casting foundry sand recycling device

Abstract

The utility model provides a kind of metal casting foundry waste sand recovery device, comprising: screening hopper, closed mechanism, cleaning mechanism and backflush mechanism;Screening hopper includes: screen and enclosure;Enclosure is installed in the top of screen, and the end of screen close to the side of enclosure is provided with deslagging port;Closed mechanism is installed at deslagging port;Cleaning mechanism includes scraper and drive assembly;Backflush mechanism is arranged below screen, and backflush mechanism and cleaning mechanism synchronous sliding.This design is synchronized with the synchronous operation of scraping and backflushing, which not only realizes efficient removal of impurities on the surface of the screen, but also avoids the decline in screening efficiency caused by mesh blockage;The linkage control of scraper sliding and closed mechanism switch ensures accurate and orderly discharge of impurities, reducing waste sand scattering and waste during deslagging.The overall transmission process does not require manual intervention, has high automation degree, can continuously and stably process foundry waste sand, improves waste sand recycling rate, and meets the needs of large-scale waste sand processing in the casting industry.

Description

Technical Field

[0001] This utility model relates to the field of metal casting waste sand recycling technology, specifically to a metal casting waste sand recycling device. Background Technology

[0002] In the casting process of metal castings, various qualified sands are used to make models. After use, these sand models contain waste residue from the casting raw materials, making them unusable and forming waste sand. Waste sand recycling devices for metal castings primarily involve the field of environmental protection technology, aiming to effectively recycle and reuse waste sand generated during the casting process. This device is suitable for recycling waste sand generated during the casting of various metal castings, such as those for automotive parts and mechanical parts. By recycling and reusing waste sand, production costs can be reduced, resource utilization efficiency improved, and environmental impact minimized.

[0003] For example, patent CN222020611U discloses a waste sand recycling device for metal castings, including a crushing component. A feeding guide frame is fixedly installed on the top of the crushing component, and a screening component is fixedly installed on the bottom of the crushing component. The crushing component includes a crushing frame, and a first crushing roller is rotatably connected to one side of the crushing frame. This utility model places the waste sand on the feeding guide frame, and the waste sand on the feeding guide frame will fall into the interior of the crushing component. The waste sand can be crushed by the combined use of the first crushing roller and the second crushing roller. The crushed waste sand will fall into the interior of the screening hopper. Then, the control switch of the drive motor is turned on, and the drive motor can drive the vertical shaft and the inclined platform to rotate. Since the inclined surface of the inclined platform is in contact with the bottom end of the bottom column, when the inclined platform rotates, it can drive the bottom column to perform reciprocating linear motion, and drive the screening hopper to perform reciprocating linear motion, thereby realizing the screening of waste sand inside the screening hopper.

[0004] However, after the screening bucket completes the screening of waste sand, the smaller diameter qualified waste sand will fall through the screen holes and be collected, while the larger diameter impurities or waste sand that is not completely crushed will remain in the screening bucket. These larger diameter impurities are more difficult to discharge. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, the technical problem to be solved by this utility model is that after the existing screening bucket completes the screening of waste sand, the qualified waste sand with smaller diameter will fall through the screen holes and be collected, while the impurities with larger diameter or the waste sand that is not completely crushed will remain in the screening bucket, and these impurities with larger diameter are difficult to be discharged.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a metal casting waste sand recycling device, comprising: A screening hopper includes: a screen and a baffle; the baffle is installed above the screen, and a slag discharge port is provided on one side of the baffle near the screen. A sealing mechanism is installed at the slag discharge port to seal the slag discharge port; A cleaning mechanism includes a scraper and a drive assembly; the scraper is slidably mounted on the enclosure, and its lower end slidably abuts against the screen; the slag discharge port is located along the stroke of the scraper; the drive assembly drives the scraper to slide, and as the scraper slides toward the slag discharge port, it controls the closing mechanism to open the slag discharge port; and A backflushing mechanism is located below the screen, and the backflushing mechanism slides synchronously with the cleaning mechanism.

[0007] Preferably, the drive assembly includes: a lead screw, a nut seat, and a motor; the lead screw is arranged along the sliding direction of the scraper; the lead screw is rotatably mounted on the enclosure, the nut seat is slidably mounted on the enclosure, and the nut seat is threadedly connected to the lead screw; the motor drives the lead screw to rotate.

[0008] Preferably, the closing mechanism includes: a sealing barrier, a spring, and a sliding rod; the sliding rod is arranged along the sliding direction of the scraper, and one end of the sliding rod is slidably mounted on the barrier, the other end of the sliding rod is fixedly connected to the scraper, the spring is sleeved on the sliding rod, and applies an elastic force to the sliding rod to drive the sealing barrier to close the slag discharge port.

[0009] Preferably, a push rod is fixedly installed on the side of the scraper near the slag discharge port.

[0010] Preferably, the backflushing mechanism includes: a connector, a pipe, and a nozzle; the pipe is fixedly connected to the scraper via the connector, and the nozzle is installed on the pipe and communicates with the pipe.

[0011] Preferably, multiple nozzles are provided along the length of the pipe.

[0012] Preferably, in the sliding direction of the scraper, the nozzle is located on the side of the scraper away from the slag discharge port.

[0013] Compared with the prior art, the present invention has at least the following advantages: In this invention, the simultaneous operation of scraper cleaning and backflushing declogging achieves efficient removal of impurities from the screen surface while avoiding the decrease in screening efficiency caused by mesh clogging. Simultaneously, the linkage control between scraper sliding and the closing mechanism ensures precise and orderly impurity discharge, reducing waste sand scattering and waste during slag discharge. The entire transmission process requires no manual intervention, exhibiting a high degree of automation, enabling continuous and stable processing of foundry waste sand, improving waste sand recycling rates, and meeting the large-scale waste sand processing needs of the foundry industry. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a perspective view of a metal casting waste sand recycling device provided in this embodiment.

[0016] Figure 2 for Figure 1 A magnified view of the area shown at point A in the middle.

[0017] Figure label: 1. Screening hopper; 11. Screen; 12. Enclosure; 13. Slag discharge port; 2. Closing mechanism; 21. Block; 22. Spring; 23. Sliding rod; 24. Push rod; 3. Cleaning mechanism; 31. Scraper; 32. Lead screw; 33. Nut seat; 4. Backflush mechanism; 41. Connecting parts; 42. Pipes; 43. Nozzles. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] In this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] See Figure 1 and Figure 2 The present invention provides an embodiment of a metal casting waste sand recycling device, comprising: a screening hopper 1, a sealing mechanism 2, a cleaning mechanism 3, and a back-blowing mechanism 4; the screening hopper 1 includes: a screen 11 and a baffle 12; the baffle 12 is installed above the screen 11, and a slag discharge port 13 is provided on one side of the baffle 12 near the screen 11; the sealing mechanism 2 is installed at the slag discharge port 13 to seal the slag discharge port 13; the cleaning mechanism 3 includes a scraper 31 and a driving assembly; the scraper 31 is slidably installed on the baffle 12, and the lower end of the scraper 31 slides against the screen 11; the slag discharge port 13 is located on the stroke of the scraper 31; the driving assembly drives the scraper 31 to slide, and during the process of the scraper 31 sliding towards the slag discharge port 13, the sealing mechanism 2 is controlled to open the slag discharge port 13; the back-blowing mechanism 4 is located below the screen 11, and the back-blowing mechanism 4 slides synchronously with the cleaning mechanism 3.

[0022] In specific implementation, the coordinated operation process and transmission effect of each mechanism of the metal casting waste sand recycling device are as follows: After the waste sand to be recycled is poured into the screening hopper 1, the screen 11 performs preliminary filtration of the waste sand. Fine sand falls through the screen 11 and is collected, while impurities remain on the surface of the screen 11. When it is necessary to clean the impurities on the screen 11, the drive component of the cleaning mechanism 3 is activated, driving the scraper 31 to slide along the inner side of the enclosure 12. The lower end of the scraper 31 is in close contact with the surface of the screen 11, and as it slides, it pushes the impurities on the surface of the screen 11 toward the slag discharge port 13. During this process, the drive component simultaneously controls the closing mechanism 2 to open the slag discharge port 13, so that the impurities pushed by the scraper 31 can be directly discharged from the slag discharge port 13, avoiding the accumulation of impurities that hinder the movement of the scraper 31. Meanwhile, the back-blowing mechanism 4 is located below the screen 11 and slides synchronously with the scraper 31. When the scraper 31 moves toward the slag discharge port 13, the back-blowing mechanism 4 moves synchronously with it and sprays high-pressure airflow below the screen 11. The airflow blows off the fine sand adhering to the mesh of the screen 11 through the mesh of the screen 11, preventing the screen 11 from clogging. When the scraper 31 finishes cleaning and resets, the back-blowing mechanism 4 stops spraying air synchronously, and the sealing mechanism 2 closes the slag discharge port 13 under the linkage of the drive component, preparing for the next round of screening.

[0023] This design, through the simultaneous operation of scraper 31 cleaning and backflushing to remove blockages, achieves efficient removal of impurities from the surface of screen 11 while avoiding the decrease in screening efficiency caused by mesh clogging. Simultaneously, the linkage control between the sliding of scraper 31 and the switching of the sealing mechanism 2 ensures precise and orderly impurity discharge, reducing the scattering and waste of waste sand during slag discharge. The entire transmission process requires no manual intervention, is highly automated, and can continuously and stably process foundry waste sand, improving the waste sand recycling rate and meeting the large-scale waste sand processing needs of the foundry industry.

[0024] See Figure 1 and Figure 2 In other embodiments, the drive assembly includes: a lead screw 32, a nut seat 33, and a motor; the lead screw 32 is arranged along the sliding direction of the scraper 31; the lead screw 32 is rotatably mounted on the enclosure 12, the nut seat 33 is slidably mounted on the enclosure 12, and the nut seat 33 is threadedly connected to the lead screw 32; the motor drives the lead screw 32 to rotate.

[0025] In practice, after the motor starts, it drives the lead screw 32 to rotate along its own axis. Since the nut seat 33 is threadedly connected to the lead screw 32 and slidably mounted on the enclosure 12, it is limited by the enclosure 12 and cannot rotate with the lead screw 32. The rotational motion of the lead screw 32 is converted into the linear sliding of the nut seat 33 along the length of the lead screw 32. The scraper 31 is fixedly connected to the nut seat 33 and slides synchronously with the nut seat 33, with its lower end always in close contact with the surface of the screen 11. When the motor rotates forward, the lead screw 32 drives the nut seat 33 to move towards the slag discharge port 13. The scraper 31 then pushes the impurities on the surface of the screen 11 towards the slag discharge port 13 and controls the closing mechanism 2 to open the slag discharge port 13 to ensure that the impurities are discharged smoothly. When the impurities are cleaned, the motor reverses, the lead screw 32 drives the nut seat 33 to drive the scraper 31 to slide back to its original position, and the closing mechanism 2 simultaneously closes the slag discharge port 13, completing one cleaning cycle.

[0026] See Figure 1 and Figure 2 In other embodiments, the sealing mechanism 2 includes: a sealing barrier 21, a spring 22, and a sliding rod 23; the sliding rod 23 is arranged along the sliding direction of the scraper 31, and one end of the sliding rod 23 is slidably mounted on the enclosure 12, and the other end of the sliding rod 23 is fixedly connected to the scraper 31; the spring 22 is sleeved on the sliding rod 23 and applies an elastic force to the sliding rod 23 to drive the sealing barrier 21 to close the slag discharge port 13.

[0027] In practice, under normal conditions, the elastic force of spring 22 pushes the seal 21 to tightly fit against the slag discharge port 13, achieving closure. When the drive assembly drives the scraper 31 to slide towards the slag discharge port 13, the scraper 31 simultaneously pushes the seal 21 to move outward from the slag discharge port 13 via the sliding rod 23. The spring 22 is compressed, and the elastic force accumulates. The slag discharge port 13 gradually opens as the seal 21 moves, and the impurities pushed by the scraper 31 can be directly discharged from the opened slag discharge port 13. After cleaning, the drive assembly drives the scraper 31 to reverse and reset, the elastic force of spring 22 is released, and the seal 21 is pushed back synchronously with the scraper 31, re-sealing the slag discharge port 13 tightly. Furthermore, a push rod 24 is fixedly installed on the side of the scraper 31 near the slag discharge port 13; this makes it easier to push the seal 21 to slide and open the slag discharge port 13.

[0028] See Figure 1 and Figure 2 In other embodiments, the backflushing mechanism 4 includes: a connector 41, a pipe 42, and a nozzle 43; the pipe 42 is fixedly connected to the scraper 31 via the connector 41, and the nozzle 43 is installed on the pipe 42 and communicates with the pipe 42.

[0029] In practice, the pipe 42 moves along the length of the screen 11 along with the scraper 31 via the connector 41. The nozzle 43 installed on the pipe 42 is positioned downwards from the screen 11 and is connected to a high-pressure air source (such as an air pump). When the scraper 31 slides towards the slag discharge port 13 under the drive of the drive assembly, the pipe 42 moves synchronously with the scraper 31, and the nozzle 43 sprays high-pressure airflow downwards from the screen 11. The airflow passes through the mesh of the screen 11 and blows away the fine sand and small particle impurities attached to the mesh, preventing the screen 11 from becoming clogged. Since the nozzle 43 moves synchronously with the scraper 31, its spray range can accurately cover the area of ​​the screen 11 currently being cleaned by the scraper 31, ensuring that while the scraper 31 pushes away surface impurities, the blockages in the mesh are cleared in time, maintaining the permeability of the screen 11. When the scraper 31 finishes cleaning and reverses to its original position, the pipe 42 and the nozzle 43 retract synchronously. At this time, the nozzle 43 can be controlled to continue spraying air or pause as needed to perform secondary cleaning of the entire area of ​​the screen 11.

[0030] Furthermore, multiple nozzles 43 are arranged along the length of the pipe 42; multiple nozzles 43 are installed at intervals along the length of the pipe 42, each nozzle 43 facing downwards from the screen 11 and communicating with the inside of the pipe 42, while the air jet direction and angle of all nozzles 43 are consistent; this multi-nozzle 43 design, combined with the synchronous sliding of the scraper 31, enables the back-blowing mechanism 4 to efficiently and comprehensively cooperate with the scraper 31 to complete the cleaning of the screen 11.

[0031] See Figure 1 and Figure 2In another embodiment, the nozzle 43 is located on the side of the scraper 31 away from the slag discharge port 13 in the sliding direction of the scraper 31. When the drive assembly drives the scraper 31 to slide towards the slag discharge port 13, the scraper 31 first pushes large impurities and sand clumps on the surface of the screen 11 forward. Immediately following, the nozzle 43 sprays high-pressure airflow into the area of ​​the screen 11 that has been initially cleaned by the scraper 31, blowing away the fine sand and tiny particles remaining in the mesh. Since the nozzle 43 is located between the scraper 31 and the slag discharge port 13, its spray area is exactly where the scraper 31 has just cleaned. At this time, large obstacles on the surface of the screen 11 have been removed, and the airflow can act more directly on the mesh, avoiding impurities from obstructing the cleaning effect.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A device for recycling waste sand from metal castings, characterized in that, include: A screening hopper includes: a screen and a baffle; the baffle is installed above the screen, and a slag discharge port is provided on one side of the baffle near the screen. A sealing mechanism is installed at the slag discharge port to seal the slag discharge port; A cleaning mechanism includes a scraper and a drive assembly; the scraper is slidably mounted on the enclosure, and its lower end slidably abuts against the screen; the slag discharge port is located along the stroke of the scraper; the drive assembly drives the scraper to slide, and as the scraper slides toward the slag discharge port, it controls the closing mechanism to open the slag discharge port; and A backflushing mechanism is located below the screen, and the backflushing mechanism slides synchronously with the cleaning mechanism.

2. The metal casting waste sand recycling device according to claim 1, characterized in that, The drive assembly includes: a lead screw, a nut seat, and a motor; the lead screw is arranged along the sliding direction of the scraper; the lead screw is rotatably mounted on the enclosure, the nut seat is slidably mounted on the enclosure, and the nut seat is threadedly connected to the lead screw; the motor drives the lead screw to rotate.

3. The metal casting waste sand recycling device according to claim 1, characterized in that, The closing mechanism includes a barrier, a spring, and a sliding rod. The sliding rod is arranged along the sliding direction of the scraper, and one end of the sliding rod is slidably mounted on the barrier. The other end of the sliding rod is fixedly connected to the scraper. The spring is sleeved on the sliding rod and applies an elastic force to the sliding rod to drive the barrier to close the slag discharge port.

4. The metal casting waste sand recycling device according to claim 3, characterized in that, A push rod is fixedly installed on the side of the scraper near the slag discharge port.

5. A metal casting waste sand recycling device according to claim 1, characterized in that, The backflushing mechanism includes: a connector, a pipe, and a nozzle; the pipe is fixedly connected to the scraper via the connector, and the nozzle is installed on the pipe and communicates with the pipe.

6. A metal casting waste sand recycling device according to claim 5, characterized in that, The nozzles are arranged in multiple ways along the length of the pipe.

7. A metal casting waste sand recycling device according to claim 5, characterized in that, In the sliding direction of the scraper, the nozzle is located on the side of the scraper away from the slag discharge port.

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