Sand dust removing device for casting processing

Abstract

The application relates to the technical field of sand dropping equipment, in particular to a sand and dust removing device for casting part machining. The device comprises a sand cleaning machine, a bucket elevator and a sand dropping roller. The sand dropping roller is erected on the feeding end of the sand cleaning machine through a support frame. The bottom of the sand dropping roller is provided with a feeding opening. The discharging end of the sand cleaning machine is connected with a discharging conveyor. The top of the sand cleaning machine is provided with a sand storage tank. The bottom of the sand cleaning machine is provided with a collecting hopper. The feeding opening is connected with the collecting hopper through a pipeline. The bottom of the collecting hopper is provided with an auger conveyor. The discharging end of the auger conveyor is connected with the feeding opening of the bucket elevator. The discharging opening of the bucket elevator is connected with the sand storage tank through a sand dropping pipe. The device realizes efficient, environment-friendly and automatic sand and dust removing of the casting parts, and significantly improves the cleanliness and resource utilization rate of the casting production line.

Description

Technical Field

[0001] This invention relates to the field of sand removal equipment technology, specifically a sand and dust removal device for casting processing. Background Technology

[0002] Shaking is a crucial step in the casting process, primarily used to separate the molding sand from the casting. It is commonly seen in sand casting and lost foam casting. Its core function is to provide a foundation for subsequent casting cleaning and molding sand recycling, and it is widely used in the metal casting production field.

[0003] In existing casting dust removal treatments, Chinese utility model patent with publication number CN210412500U discloses a dust removal device for casting processing. The device includes a workbench and a housing shell. The housing shell is fixed to the upper end of the workbench. An L-shaped spray pipe is provided inside the housing shell, and several nozzles are evenly connected to the bottom and side walls of the L-shaped spray pipe. A water inlet pipe is connected to the middle of the upper end of the L-shaped spray pipe.

[0004] However, the aforementioned device has significant drawbacks when using spraying to thoroughly remove sand and dust from castings. Because water is used directly for spraying, additional drying equipment is required to prevent moisture residue from affecting the casting quality. This not only increases equipment costs but also extends the entire production cycle. If drying is incomplete, water residue on the casting surface can easily cause corrosion, affecting the casting's appearance. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a sand and dust removal device for casting processing, aiming to achieve efficient and high-quality sand and dust removal treatment for castings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sand removal and dust removal device for casting processing, comprising a sand cleaning machine and a sand removal drum, wherein the sand removal drum is mounted on the feed end of the sand cleaning machine via a support frame; the sand cleaning machine comprises a machine body and a track, wherein the track is arranged around a roller assembly to form a stable transmission structure, the roller assembly comprises a drive roller, a first transmission roller, a support roller, and a second transmission roller rotatably mounted between the left and right inner walls of the machine body, and a first drive motor is fixed on one side of the top of the machine body, the first drive motor being driven and connected to the drive roller; slewing support bearings are installed on both the left and right inner walls of the machine body, the inner ring of the slewing support bearing pressing against the track, such that a portion of the track body forms a concave loading area between the drive roller, the support roller, and the first transmission roller; the outer surface of the track is provided with multiple sets of feeding ridges distributed along its length direction, the feeding ridges being continuously arranged along the entire width direction of the track.

[0007] Preferably, the feeding ridge consists of two connected sand feeding sections and a sand blocking section. The sand feeding section extends obliquely from the inlet end of the sand cleaner to the outlet end of the sand cleaner, and the sand blocking section extends obliquely from the outlet end of the sand cleaner to the inlet end of the sand cleaner.

[0008] Preferably, the length ratio of the sand-blocking section to the sand-carrying section is 1:5.

[0009] Preferably, the system also includes a bucket elevator and a discharge conveyor connected to the discharge end of the sand cleaning machine; a sand storage tank is mounted on the top of the machine body, a collection hopper is mounted on the bottom of the machine body, the track is located above the collection hopper, and a screen is covered on top of the collection hopper; a discharge port is provided at the bottom of the sand drop drum, and the discharge port is connected to the collection hopper through a pipe; an auger conveyor is installed at the bottom of the collection hopper, the discharge end of the auger conveyor is connected to the inlet of the bucket elevator, and the discharge port of the bucket elevator is connected to the sand storage tank through a sand drop pipe.

[0010] Preferably, the sand-removing roller includes an outer cylinder and an inner cylinder, the inner cylinder being coaxially sleeved inside the outer cylinder, the outer cylinder being fixed to the top of the support frame, and the material discharge port being located at the bottom of the outer cylinder; the discharge end of the inner cylinder is sleeved on the rotary support bearing on the right side wall of the sand cleaner, the outer wall of the feed end of the inner cylinder is provided with an axially concentric retaining ring, and two sets of support wheels are symmetrically installed on the top of the support frame corresponding to the retaining ring position, the two sets of support wheels being arranged along the circumferential tangential direction of the retaining ring to form a two-point support structure; a third drive motor is fixed at one end of the support frame, and the output end of the third drive motor is driven connected to the wheel axle of one set of support wheels.

[0011] Preferably, the middle section of the inner cylinder is covered with screen holes, and multiple sets of circumferentially evenly distributed lifting plates are provided on the inner wall of the middle section of the inner cylinder, and multiple sets of circumferentially evenly distributed guide plates are provided on the inner walls of the left and right sections of the inner cylinder.

[0012] Preferably, it also includes a cyclone separator, wherein a first dust collection hood communicating with its inner cavity is installed on the top of the body, and a second dust collection hood communicating with its inner cavity is installed on the top of the outer cylinder, and the first dust collection hood and the second dust collection hood are connected to the cyclone separator through a pipe.

[0013] Preferably, the front end of the machine body is hinged with an inspection door facing the cargo area.

[0014] Preferably, the inspection door is provided with an observation window.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects:

[0016] The sand removal drum rotates its inner cylinder, causing the castings to tumble and collide. Using mechanical force, the molding sand is removed from the surface of the castings, completing most of the sand and dust separation. The remaining sand and dust are further removed in the sand cleaning machine. The removed sand and dust enter the sand cleaning machine's collection hopper, and is then sent to the bucket elevator via an auger conveyor. Finally, it returns to the sand storage tank through the sand removal pipe. This achieves efficient, environmentally friendly, and automated sand and dust removal for castings, significantly improving the cleanliness and resource utilization of the casting production line. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is the front view of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the sand cleaning machine;

[0020] Figure 3 This is a schematic diagram of the internal structure of a sand cleaning machine;

[0021] Figure 4 This is a schematic diagram of the track structure;

[0022] Figure 5 This is a schematic diagram of the sand removal roller.

[0023] Explanation of reference numerals in the attached drawings: 1-Sand cleaning machine, 2-Discharge conveyor, 3-First drive motor, 4-Bucket elevator, 5-Second drive motor, 6-Sand storage tank, 7-Sand discharge roller, 8-Support frame, 9-Machine body, 10-Inspection door, 11-Observation window, 12-Auger conveyor, 13-First drive roller, 14-Issuer roller, 15-Discharge port, 16-Second drive roller, 17-Baffle curtain, 18-Drive roller 19-First dust collection hood, 20-Screen, 21-Collection hopper, 22-Crawler, 23-Feeding ridge, 24-Slewing support bearing, 25-Inlet, 26-Sand blocking section, 27-Sand feeding section, 28-Second dust collection hood, 29-Outer cylinder, 30-Screen hole, 31-Blocking ring, 32-Inner cylinder, 33-Support wheel, 34-Third drive motor, 35-Discharge port, 36-Guide plate, 37-Lifting plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Those skilled in the art will recognize that the invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of it.

[0025] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the invention. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] like Figure 1 As shown, the sand and dust removal device for casting processing consists of a sand cleaning machine 1, a bucket elevator 4, a sand drop drum 7, and a cyclone separator (not shown in the figure), which realizes continuous and automated operation of sand and dust removal for castings, and greatly improves sand removal efficiency and operational stability.

[0027] like Figure 2 and Figure 3 As shown, the sand cleaning machine 1 includes a roller assembly, a machine body 9, and a track 22. The roller assembly includes a drive roller 18, a first transmission roller 13, a support roller 14, and a second transmission roller 16, all mounted between the left and right inner walls of the machine body 9 via bearing seats. The track 22 is wound around these rollers to form a stable transmission structure. A first drive motor 3 is fixed to one side of the top of the machine body 9, and the first drive motor 3 is connected to the drive roller 18 via a sprocket and chain assembly.

[0028] The front end of the machine body 9 is hinged with a maintenance door 10 facing the loading area, and the maintenance door 10 is equipped with an observation window 11. Rotary support bearings 24 are installed on the inner sides of both the left and right side walls of the machine body 9. One end of the inner ring of the rotary support bearing 24 protrudes from the outer ring to form a roller pressing section. The roller pressing sections on both sides press the track 22 inward from both sides, so that part of the track 22 forms a concave loading area within the triangular region formed by the drive roller 18, the idler roller 14, and the first transmission roller 13, which can better accommodate and transport the castings and prevent them from rolling off.

[0029] The inner ring bore of the right-side slewing support bearing 24 forms an inlet 25 directly facing the loading area, and an outlet 15 directly facing the loading area is provided on the left side wall of the machine body 9. Both the outlet 15 and the inlet 25 are equipped with baffles 17. When no object passes through, the baffles hang down naturally, effectively preventing the dust inside the sand cleaner 1 from spreading outwards. A discharge conveyor 2, directly facing the outlet 15, is connected to the left side of the sand cleaner 1, continuously transporting the sand-de-sanded castings to the next process.

[0030] A second drive motor 5 is provided on one side of the main body of the bucket elevator 4. The second drive motor 5 is driven and connected to the input shaft of the bucket elevator 4 through a sprocket and chain assembly. A collection bucket 21 is fixed at the bottom of the machine body 9 and is located below the track 22. The top of the collection bucket 21 is covered with a screen 20. An auger conveyor 12 is fixedly installed at the bottom of the collection bucket 21. The discharge end of the auger conveyor 12 is fixedly connected to the inlet of the bucket elevator 4. The discharge outlet of the bucket elevator 4 is connected to the sand storage tank 6 mounted on the top of the machine body 9 through a sand drop pipe.

[0031] like Figure 3 and Figure 4 As shown, the outer surface of the track 22 is provided with multiple sets of feeding ridges 23 distributed along its length, and the feeding ridges 23 are continuously arranged along the width of the track 22. Under the action of the track 22, the castings tumble and collide within the loading area, using inertia and impact force to shake off sand and dust. The shaken-off sand and dust do not remain on the surface of the castings or the surface of the feeding ridges 23, but instead roll into the "collection groove" formed between two adjacent feeding ridges 23, physically separating the separated sand and dust from the castings that are still being cleaned, preventing secondary pollution. Because the track 22 operates continuously, the "collection groove" containing sand and dust is lifted as the track 22 rotates. The lifted sand and dust is thrown at the position of the drive roller 18, and under the action of gravity, the sand and dust passes through the screen 20 and finally falls into the collection hopper 21.

[0032] The feeding ridge 23 consists of two connected sections: a sand-feeding section 27 and a sand-blocking section 26. The sand-feeding section 27 extends obliquely from the inlet 25 of the sand cleaner 1 towards the outlet 15, acting like an auger to continuously push the casting towards the outlet 15. The sand-blocking section 26 is inclined in the opposite direction to the sand-feeding section 27, extending obliquely from the outlet 15 towards the inlet 25. When the track 22 is running, any sand or dust not promptly thrown out of the "collection groove" is caught by the "valley" formed between the sand-feeding section 27 and the sand-blocking section 26, preventing the sand or dust in the "collection groove" from continuing to move forward with the casting.

[0033] The sand feeding section 27 is longer than the sand blocking section 26, and the length ratio of the sand blocking section to the sand feeding section is 1:5. The sand feeding section 27 is dominant, ensuring that the castings can pass through at a relatively fast speed to meet the production cycle. Although the sand blocking section 26 is short, its steep angle is sufficient to block and contain sand and dust. If the sand blocking section 26 is too long, it will excessively hinder the movement of the castings, and may even push some small castings back, causing the castings to jam, thus affecting the overall sand removal efficiency.

[0034] like Figure 5 As shown, the sand-dropping roller 7 adopts a double-layer structure, consisting of an outer cylinder 29 and an inner cylinder 32. The inner cylinder 32 is coaxially sleeved inside the outer cylinder 29, while the outer cylinder 29 is horizontally fixed to the top of the support frame 8. The bottom of the outer cylinder 29 is provided with a discharge port 35 that connects to its inner cavity.

[0035] To facilitate better material discharge, the outer cylinder 29 can be installed at an angle, so that the discharge end is lower than the feed end, thereby reducing the retention and accumulation of castings in the inner cylinder 32.

[0036] The discharge end of the inner cylinder 32 is fitted into the inner ring of the right-side slewing support bearing 24, forming a slewing support structure through a transition fit. An axially concentric retaining ring 31 is fixed to the outer wall of the feed end of the inner cylinder 32. Two sets of support wheels 33 are symmetrically installed on the top of the support frame 8 corresponding to the position of the retaining ring 31. The two sets of support wheels 33 are arranged along the circumferential tangential direction of the retaining ring 31 to form a two-point support structure, which at the same time restricts the axial displacement of the inner cylinder 32.

[0037] One end of the support frame 8 is fixed with a third drive motor 34. The output end of the third drive motor 34 is connected to the axle of one of the support wheels 33 through a coupling. The friction between the support wheel 33 and the retaining ring 31 drives the entire inner cylinder 32 to rotate.

[0038] The middle section of the inner cylinder 32 is covered with screen holes 30. Multiple sets of circumferentially evenly distributed lifting plates 37 are provided on the inner wall of the middle section of the cylinder. Multiple sets of circumferentially evenly distributed guide plates 36 are provided on the inner walls of the left and right sections of the inner cylinder 32. The guide plates 36 are arranged obliquely or in an arc shape.

[0039] When the inner cylinder 32 rotates, the guide plate 36 on its right side receives the small and medium-sized sand molds fed from upstream and guides them to the middle section of the cylinder. During the journey, the guide plate 36 lifts the sand mold to a certain height and then throws it down, using the impact force generated by its fall to break the sand mold and release the castings inside. After entering the middle section of the cylinder, the sand mold is continuously lifted and thrown by the lifting plate 37, and the sand mold and castings collide with each other, thereby removing the remaining sand mold and further crushing it. The broken molding sand falls through the screen holes 30 on the middle section cylinder wall into the interlayer between the outer cylinder 29 and the inner cylinder 32, and finally enters the collection hopper 21 of the sand cleaner 1 through the pipeline system via the bottom discharge port 35. The guide plate 36 on the left side of the inner cylinder 32 gathers the castings that have undergone preliminary sand removal and increases their axial movement speed, finally discharging them into the sand cleaner 1 for further processing.

[0040] After the first drive motor 3 starts, it drives the drive roller 18 to rotate. The drive roller 18 serves as the power source for the track 22, causing the track 22 to begin cyclical movement. When the casting is placed in the carrying area of ​​the track 22, it tumbles and collides with each other under the drive of the track 22, while moving towards the discharge port 15. During this process, the sand and dust adhering to the surface of the casting and hidden in the holes (such as screw holes and cavities) are shaken off the casting by the combined action of inertia and impact. The shaken-off sand and dust collect in the "collection ditch," which moves with the track 22 and is thrown at the position of the drive roller 18, eventually falling into the collection hopper 21 through the screen 20 under the action of gravity. The casting, having completed the secondary sand and dust removal, is smoothly discharged onto the discharge conveyor 2 facing the discharge port 15 by the sand feeding section 27 and its own inertia, ready to enter the next production process.

[0041] The sand and dust falling into the collection hopper 21 are sent to the bucket elevator 4 via the screw conveyor 12, and then lifted by the bucket elevator 4 and finally stored in the sand storage tank 6, in preparation for subsequent sand and dust treatment or reuse.

[0042] A first dust collection hood 19, which connects to the inner cavity of the main body 9, is installed on the top of the outer cylinder 29, and a second dust collection hood 28, which also connects to the inner cavity of the outer cylinder 29, is installed on the top of the outer cylinder 29. The first dust collection hood 19 and the second dust collection hood 28 are connected to a cyclone separator via a pipe. The cyclone separator uses centrifugal force to separate sand and dust from the air, thereby achieving the recycling of sand and dust and the purification of the air.

[0043] The embodiments described above are not exhaustive and do not limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A dust removal device for casting processing, characterized in that: The system includes a sand cleaning machine (1) and a sand removal drum (7). The sand removal drum (7) is mounted on the feed end of the sand cleaning machine (1) via a support frame (8). The sand cleaning machine (1) includes a machine body (9) and a track (22). The track (22) is arranged around a roller assembly to form a stable transmission structure. The roller assembly includes a drive roller (18), a first transmission roller (13), a support roller (14), and a second transmission roller (16) that are rotatably mounted between the left and right inner walls of the machine body (9). A first drive motor (3) is fixed on one side of the top of the machine body (9). The first drive motor (3) is connected to the drive roller (18) for driving. Rotary support bearings (24) are installed on both the left and right inner walls of the machine body (9). The inner ring of the rotary support bearing (24) presses against the track (22), so that part of the track (22) forms an indentation between the drive roller (18), the support roller (14), and the first transmission roller (13). The carrying area; the outer surface of the track (22) is provided with multiple sets of feeding ridges (23) distributed along its length direction, the feeding ridges (23) are continuously arranged along the width direction of the track (22); the collection groove formed between adjacent feeding ridges (23) is used to collect sand and dust, physically separating the separated sand and dust from the castings that are still being cleaned, to prevent secondary pollution; the feeding ridges (23) consist of two connected sand feeding sections (27) and The sand-blocking section (26) is composed of a sand-feeding section (27) and a sand-blocking section (26) forming a valley for intercepting sand and dust, so as to prevent sand and dust in the collection ditch from being carried out with the casting. The length ratio of the sand-blocking section (26) to the sand-feeding section (27) is 1:

5. The sand-feeding section (27) is obliquely pointed from the inlet end of the sand cleaner (1) to the outlet end of the sand cleaner (1), and the sand-blocking section (26) is obliquely pointed from the outlet end of the sand cleaner (1) to the inlet end of the sand cleaner (1).

2. The dust removal device for casting processing according to claim 1, characterized in that: It also includes a bucket elevator (4) and a discharge conveyor (2) connected to the discharge end of the sand cleaner (1); a sand storage tank (6) is mounted on the top of the machine body (9), a collection bucket (21) is provided at the bottom of the machine body (9), the track (22) is located above the collection bucket (21), and the top of the collection bucket (21) is covered with a screen (20); the bottom of the sand drop roller (7) is provided with a discharge port (35), and the discharge port (35) is connected to the collection bucket (21) through a pipe; a screw conveyor (12) is installed at the bottom of the collection bucket (21), the discharge end of the screw conveyor (12) is connected to the inlet of the bucket elevator (4), and the discharge port of the bucket elevator (4) is connected to the sand storage tank (6) through a sand drop pipe.

3. The dust removal device for casting processing according to claim 2, characterized in that: The sand-dropping roller (7) includes an outer cylinder (29) and an inner cylinder (32). The inner cylinder (32) is coaxially sleeved inside the outer cylinder (29). The outer cylinder (29) is fixed to the top of the support frame (8). The discharge port (35) is located at the bottom of the outer cylinder (29). The discharge end of the inner cylinder (32) is sleeved on the rotary support bearing (24) on the right side wall of the sand cleaning machine (1). The outer wall of the feed end of the inner cylinder (32) is provided with an axially concentric retaining ring (31). The top of the support frame (8) is symmetrically equipped with two sets of support wheels (33) corresponding to the position of the retaining ring (31). The two sets of support wheels (33) are arranged along the circumferential tangent direction of the retaining ring (31) to form a two-point support structure. One end of the support frame (8) is fixed with a third drive motor (34). The output end of the third drive motor (34) is driven connected to the wheel axle of one of the support wheels (33).

4. The dust removal device for casting processing according to claim 3, characterized in that: The middle section of the inner cylinder (32) is covered with screen holes (30), and multiple sets of circumferentially evenly distributed lifting plates (37) are provided on the inner wall of the middle section of the inner cylinder (32), and multiple sets of circumferentially evenly distributed guide plates (36) are provided on the inner walls of the left and right sections of the inner cylinder (32).

5. The dust removal device for casting processing according to claim 4, characterized in that: It also includes a cyclone separator, with a first dust collection hood (19) connected to its inner cavity installed on the top of the body (9), and a second dust collection hood (28) connected to its inner cavity installed on the top of the outer cylinder (29). The first dust collection hood (19) and the second dust collection hood (28) are connected to the cyclone separator through a pipe.

6. The dust removal device for casting processing according to claim 1, characterized in that: The front end of the body (9) is hinged with a maintenance door (10) facing the cargo area.

7. The dust removal device for casting processing according to claim 6, characterized in that: The inspection door (10) is provided with an observation window (11).

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