A steel shot recovery device for coated sand casting

Abstract

This invention provides a steel shot recovery device for coated sand casting, belonging to the technical field of coated sand casting equipment. It includes a rectangular cross-section box with several sets of separation units arranged alternately from top to bottom inside the box. Each separation unit includes several separation rollers aligned on the same straight line. Each separation roller includes a mandrel, a magnetic sleeve, and a threaded rubber sleeve. The magnetic sleeve is fitted over the mandrel, and the threaded rubber sleeve is fitted over the magnetic sleeve. The two ends of the mandrel are rotatably connected to the box and are driven to rotate by a drive mechanism. A filter plate located inside the box is arranged between adjacent separation units. The filter plate guides the mixture to the center of the guide plate. During the rotation of the separation rollers, the steel shot adsorbed in the threaded grooves on the separation rollers is driven to move from the first end to the last end of the separation roller. The bottom of the box has a waste sand outlet near the first end of the separation roller and a steel shot outlet near the last end of the separation roller. This invention has the advantages of high efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of coated sand casting equipment, and relates to a steel shot recovery device for coated sand casting. Background Art

[0002] In the process of coated sand casting, the shell mold is first placed into the box, and then steel shot is filled between the outside of the shell mold and the inner wall of the box and compacted. Then, molten iron is poured into the inner cavity of the shell mold. After pouring and cooling, the casting is formed. Finally, the casting, waste sand and steel shot in the box are poured out together, the casting and waste sand and steel shot are separated, and the steel shot and waste sand are recycled and reused.

[0003] Since the waste sand after exiting the chamber comes in various forms such as lumps, granules, and sand particles, and some steel shot also has sand particles adhering to it, it is difficult to separate the waste sand from the steel shot by direct filtration. It needs to be combined with operations such as vibrating screen and tamping to effectively separate steel shot and waste sand. The operation is cumbersome, inefficient, and the dust and exhaust gas are inconvenient to handle. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a steel shot recovery device for coated sand casting. The technical problem to be solved by this invention is how to efficiently separate steel shot from waste sand.

[0005] The objective of this invention can be achieved through the following technical solution: A steel shot recovery device for coated sand casting, characterized in that it includes a box with a rectangular cross-section, an inlet at the upper end of the box, and a plurality of separation units arranged alternately from top to bottom inside the box. Each separation unit includes a plurality of separation rollers aligned on the same straight line. Each separation roller includes a mandrel, a magnetic sleeve, and a threaded rubber sleeve. The magnetic sleeve is fitted over the mandrel, and the threaded rubber sleeve is fitted over the magnetic sleeve. The two ends of the mandrel are rotatably connected to the box. The mandrel is driven to rotate by a driving mechanism. Adjacent... A guide plate located inside the housing is provided between the separation units. The guide plate can guide the mixture to the beginning of the separation roller. A filter plate located inside the housing is provided between adjacent separation units. The filter plate can guide the mixture to the middle of the guide plate. During the rotation of the separation roller, the steel shot adsorbed in the threaded groove on the separation roller can be driven to move from the beginning to the end of the separation roller. A discharge port is opened on the guide plate near the end of the separation roller. The bottom of the housing is provided with a waste sand discharge port near the beginning of the separation roller and a steel shot discharge port near the end of the separation roller.

[0006] Furthermore, an inclined plate is provided at the feed inlet, which can guide the material to the beginning of the separating roller.

[0007] Furthermore, from the top to the bottom of the box, the diameter of each material discharge port gradually increases.

[0008] Furthermore, the width of the threaded groove on the threaded rubber sleeve is greater than the diameter of the steel shot.

[0009] Furthermore, the separation rollers in two longitudinally adjacent separation units are misaligned.

[0010] Furthermore, a partition is installed between the waste sand outlet and the steel shot outlet.

[0011] The separating roller has a three-layer structure. The inner spindle is used to connect to the housing, allowing the separating roller to rotate and connect to the housing. The middle magnetic sleeve is made of permanent magnet material, and the outer threaded rubber sleeve is used to buffer the material and increase the distance between the magnetic sleeve and the material. When the material falls onto the separating roller, some steel shot detaches from the separating roller due to its greater kinetic energy and larger quantity. Waste sand is divided into filterable and non-filterable sizes. Filterable waste sand directly enters the next separating roller position, while non-filterable waste sand is guided to the guide plate. During the process from top to bottom, larger particles of waste sand are dispersed due to bumps and impacts. Waste sand that cannot be dispersed and that has already been dispersed fall into the waste sand outlet. The steel shot is guided to the end of the separating roller in batches, and then falls into the discharge port at the end of the threaded groove due to the increased distance from the magnetic sleeve, and finally enters the steel shot outlet.

[0012] When the steel shot comes into contact with the separating roller, the steel shot tends to be close to or inside the thread groove of the threaded rubber sleeve because the distance between the thread groove and the magnetic sleeve is shorter. Under the action of gravity, the steel shot is located below the separating roller and is in a hanging state. As the separating roller rotates, the steel shot can move from the first end to the last end of the separating roller and then fall into the discharge port.

[0013] The guide plate, filter plate, and separating roller can reduce the downward kinetic energy of the mixture, allowing the steel shot to adhere better to the separating roller. At the same time, the guide plate and filter plate are also the areas where the mixture impacts.

[0014] This method not only allows steel shot to be separated from waste sand in batches and in an orderly manner, but also effectively cleans the steel shot by rubbing against the threaded rubber sleeve as the steel shot moves to different positions in the thread groove, thereby causing the waste sand adhering to the surface of the steel shot to peel off from the steel shot. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the steel shot recovery device.

[0016] Figure 2 This is a cross-sectional view of the separating roller.

[0017] Figure 3 This is a structural schematic diagram of the separation unit (top view of the box).

[0018] Figure 4 This is a schematic diagram showing the movement of steel shot on the separating roller.

[0019] Figure 5 This is a schematic diagram of the drive mechanism that rotates each separating roller.

[0020] In the diagram, 1 is the housing; 2 is the feed inlet; 3 is the separating roller; 31 is the mandrel; 32 is the magnetic sleeve; 33 is the threaded rubber sleeve; 41 is the guide plate; 42 is the filter plate; 51 is the waste sand outlet; 52 is the steel shot outlet; 6 is the tilting plate; 7 is the partition plate; and 8 is the discharge port. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the steel shot recovery device for coated sand casting includes a rectangular box 1 with an inlet 2 at the top. Several sets of separation units are arranged alternately from top to bottom inside the box 1. Each separation unit includes several separation rollers 3 aligned on the same straight line. Each separation roller 3 includes a mandrel 31, a magnetic sleeve 32, and a threaded rubber sleeve 33. The magnetic sleeve 32 is fitted over the mandrel 31, and the threaded rubber sleeve 33 is fitted over the magnetic sleeve 32. The two ends of the mandrel 31 are rotatably connected to the box 1. The mandrel 31 is driven to rotate by a drive mechanism. A separation unit located inside the box 1 is provided between adjacent separation units. The guide plate 41 guides the mixture to the beginning of the separating roller 3. A filter plate 42 is provided between adjacent separating units inside the housing 1. The filter plate 42 guides the mixture to the middle of the guide plate 41. During the rotation of the separating roller 3, the steel shot adsorbed in the threaded groove on the separating roller 3 can be driven to move from the beginning to the end of the separating roller 3. The guide plate 41 has a discharge port 8 near the end of the separating roller 3. The bottom of the housing 1 has a waste sand discharge port 51 near the beginning of the separating roller 3 and a steel shot discharge port 52 near the end of the separating roller 3.

[0023] An inclined plate 6 is provided at the feed inlet 2. The inclined plate 6 can guide the material to the beginning of the separating roller 3. The beginning and end of the separating roller 3 are referred to as follows: Figure 4 As shown.

[0024] From the top to the bottom of the housing 1, the diameter of each discharge port 8 gradually increases. The discharge port is located near the end of the separating roller 3 on the wall panel of the housing 1, and its diameter increases from top to bottom, which can prevent the steel shot from falling back onto the guide plate 41 below.

[0025] The width of the threaded groove on the threaded rubber sleeve 33 is greater than the diameter of the steel shot. It is preferable to have a width of 1.5 to 3 times that of the steel shot to allow it to be contained with adhering waste sand.

[0026] The separation rollers 3 in two longitudinally adjacent separation units are staggered, and each separation unit in the longitudinal direction forms a barrier against the mixture. As the mixture falls from top to bottom, it can collide with the separation rollers 3, which has a positive effect on refining waste sand particles or waste sand blocks and peeling off waste sand adhering to the steel shot.

[0027] A partition 7 is provided between the waste sand outlet 51 and the steel shot outlet 52.

[0028] The separating roller 3 has a three-layer structure. The inner spindle 31 is used to connect with the housing 1, so that the separating roller 3 is rotatably connected to the housing 1. The middle magnetic sleeve 32 is made of permanent magnet material. The outer threaded rubber sleeve 33 is used to buffer the material and increase the distance between the magnetic sleeve 32 and the material. When the material falls onto the separating roller 3, some steel shot will detach from the separating roller 3 due to its large kinetic energy and large number of steel shot. The waste sand is divided into filterable size and non-filterable size. The filterable waste sand directly enters the position of the next separating roller 3, while the non-filterable waste sand is guided to the guide plate 41. In the process from top to bottom, the larger particles of waste sand are dispersed due to bumps and impacts. The waste sand that cannot be dispersed and the already dispersed waste sand fall into the waste sand outlet 51. The steel shot is guided to the end of the separating roller 3 in batches, and then falls into the drop port 8 at the end of the threaded groove due to the increased distance from the magnetic sleeve 32, and finally enters the steel shot outlet 52.

[0029] When the steel shot comes into contact with the separating roller 3, the steel shot tends to be close to or inside the thread groove of the threaded rubber sleeve 33 because the distance between the thread groove and the magnetic sleeve 32 is shorter. The steel shot is located below the separating roller 3 under the action of gravity and is in a hanging state. As the separating roller 3 rotates, the steel shot can move from the first end to the last end of the separating roller 3 and then fall into the discharge port 8.

[0030] This method not only allows steel shot to be separated from waste sand in batches and in an orderly manner, but also effectively cleans the steel shot by rubbing against the threaded rubber sleeve 33 as the steel shot moves to different positions in the thread groove, thereby causing the waste sand adhering to the surface of the steel shot to peel off from the steel shot.

[0031] There are many ways to drive the separation roller 3 to rotate, such as Figure 5 As shown, a geared motor is installed on the upper part of the housing 1. Five grooved pulleys (1) are arranged along the axis of the output shaft of the geared motor. Each separating roller 3 is equipped with a pulley (2). An intermediate pulley is installed at the lower part of the housing 1, and this intermediate pulley also has five grooves that match the pulleys. All five belts provide longitudinal traction, with one longitudinal belt driving one of the five longitudinal pulleys (2). Because the separating rollers 3 on adjacent separating units are staggered, this staggered arrangement must ensure that each pulley (2) can simultaneously drive one of the pulleys (2) of each longitudinal separating unit. Figure 5As shown, the belt is tangent to the outer side of the first longitudinal pulley two, and simultaneously tangent to the inner side of the second longitudinal separation unit pulley two.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A steel shot recovery device for coated sand casting, characterized in that, The enclosure includes a rectangular box (1) with a feed inlet (2) at the top. Several sets of separation units are arranged alternately from top to bottom inside the box (1). Each separation unit includes several separation rollers (3) on the same straight line. Each separation roller (3) includes a spindle (31), a magnetic sleeve (32), and a threaded rubber sleeve (33). The magnetic sleeve (32) is fitted over the spindle (31), and the threaded rubber sleeve (33) is fitted over the magnetic sleeve (32). The two ends of the spindle (31) are rotatably connected to the box (1). The spindle (31) is driven to rotate by a driving mechanism. A guide plate (4) located inside the box (1) is provided between adjacent separation units. 1) The guide plate (41) can guide the mixture to the beginning of the separating roller (3). A filter plate (42) is provided between adjacent separating units inside the box (1). The filter plate (42) can guide the mixture to the middle of the guide plate (41). During the rotation of the separating roller (3), the steel shot adsorbed in the threaded groove on the separating roller (3) can be driven to move from the beginning to the end of the separating roller (3). The guide plate (41) has a discharge port (8) near the end of the separating roller (3). The bottom of the box (1) is provided with a waste sand discharge port (51) near the beginning of the separating roller (3) and a steel shot discharge port (52) near the end of the separating roller (3). The width of the threaded groove on the threaded rubber sleeve (33) is greater than the diameter of the steel shot.

2. The steel shot recovery device for coated sand casting according to claim 1, characterized in that, An inclined plate (6) is provided at the feed inlet (2), which can guide the material to the beginning of the separating roller (3).

3. The steel shot recovery device for coated sand casting according to claim 1, characterized in that, From the top of the box (1) to the bottom of the box (1), the diameter of each material discharge port (8) gradually increases.

4. A steel shot recovery device for coated sand casting according to claim 1, 2, or 3, characterized in that, The separation rollers (3) in two longitudinally adjacent separation units are misaligned.

5. A steel shot recovery device for coated sand casting according to claim 1, 2, or 3, characterized in that, A partition (7) is provided between the waste sand outlet (51) and the steel shot outlet (52).

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