A molding sand recycling device for castings

Abstract

The present invention relates to the field of sand casting, and particularly to a sand recycling device for castings. It includes a crushing body, a crushing device, and a feeding device. A feeding chamber, a crushing chamber, and a discharging chamber are formed inside the crushing body. The crushing device is arranged in the crushing chamber and can crush materials. The feeding device includes a first auger and a second auger arranged in the feeding chamber. The first auger and the second auger extend along a first direction and are arranged along a second direction. Both the first auger and the second auger can rotate around their own axes, and the projections of the blades of the first auger and the second auger on a projection plane perpendicular to their axes at least partially overlap. By setting the feeding device as a double-auger feeding in the present invention, the first auger and the second auger can extrude the materials during the feeding process, pre-crush the materials. The pre-crushed materials are conveyed to the crushing device and crushed again, reducing the crushing pressure of the crushing device and preventing the materials from piling up at the crushing device.

Description

Technical Field

[0001] The present invention relates to the field of sand casting, and particularly relates to a sand recycling device for castings. Background Art

[0002] Sand casting refers to a casting method for producing castings in sand molds. Steel, iron, and most non-ferrous alloy castings can be obtained by sand casting methods. Since the molding materials used in sand casting are inexpensive and easily available, and the mold manufacturing is simple, it can adapt to single-piece production, batch production, and mass production of castings. For a long time, it has been the basic process in casting production. Molding sand is the basic raw material for sand casting. After casting, the molding sand can be recycled and reused. During the casting process, due to pressure compaction and high-temperature environment, the molding sand will agglomerate and harden, etc. Therefore, it needs to be broken up during recycling. In large-scale casting production and intelligent casting, a crusher is often added to the intelligent casting island production line to crush and screen the used molding sand with the crusher to improve the recycling efficiency and thus the production efficiency.

[0003] During the use of the molding sand recycling crusher in the related art, when the feeding speed is relatively fast, the molding sand blocks may accumulate in the crushing chamber, affecting the crushing effect and reducing the crushing efficiency.

[0004] The information disclosed in the background art section of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] According to the deficiencies of the prior art, the present invention provides a sand recycling device for castings to solve the problem that the existing sand crushing equipment is prone to material accumulation.

[0006] The sand recycling device for castings of the present invention adopts the following technical solutions: including:

[0007] A machine base, on which a crushing body is arranged. An feeding chamber, a crushing chamber, and a discharging chamber that are connected in sequence are formed inside the crushing body. The feeding chamber is located on one side of the crushing chamber, and the discharging chamber is located at the bottom of the crushing chamber. An inlet and an outlet are arranged on the crushing body. The inlet is communicated with the feeding chamber, and the outlet is communicated with the discharging chamber;

[0008] A crushing device, which is arranged in the crushing chamber and configured to be able to crush materials;

[0009] The feeding device includes a first auger and a second auger disposed in the feeding chamber. The first auger and the second auger extend along a first direction and are arranged along a second direction. The first direction and the second direction are perpendicular. Both the first auger and the second auger can rotate around their own axes. The first auger and the second auger have opposite helix directions and opposite rotation directions to convey materials to the crushing device. The projections of the blades of the first auger and the blades of the second auger on the projection plane perpendicular to their axes at least partially overlap.

[0010] Optionally, the crushing device includes a crushing screen and a crushing motor. The crushing screen is disposed in the crushing chamber. The crushing screen is cylindrical and its axis is parallel to the axes of the first auger and the second auger. The crushing screen can rotate around its own axis. At least one end of the crushing screen close to the feeding chamber is open and communicates with the feeding chamber. The crushing motor is disposed on the crushing body and its output end is connected to the crushing screen.

[0011] Optionally, the distance between the first auger and the second auger can be adjusted and is configured to be negatively correlated with the degree of material accumulation in the crushing screen.

[0012] Optionally, a support plate is disposed in the feeding chamber. The support plate can be slidably disposed on the crushing body along the radial direction of the first auger and the second auger. The second auger is rotatably disposed on the support plate. A driving cylinder is disposed on the crushing body, and the output end of the driving cylinder is connected to the support plate.

[0013] Optionally, an arc plate is connected to one side of the support plate. The arc plate is located in the feeding chamber, and the inner diameter of the arc plate is adapted to the outer diameter of the second auger.

[0014] Optionally, the casting sand recycling equipment further includes a sensor configured to be able to sense the rotation speed of the first auger or the second auger, and then control the action of the driving cylinder.

[0015] Optionally, a sensing member is disposed in the crushing screen. The sensing member includes a core shaft and sensing plates uniformly arranged on the core shaft in the circumferential direction. The sensing plates extend along the radial direction of the core shaft, and the core shaft is coaxial with the crushing screen. The sensing member can rotate around its own axis and has a preset rotational resistance. When the material in the crushing screen accumulates to contact the sensing plates, the material rotates with the crushing screen and pushes the sensing member to rotate through the sensing plates.

[0016] The casting sand recycling equipment further includes a power transmission device configured to be able to drive the first auger and the second auger to rotate in the same speed and in opposite directions and be able to convert the rotation of the sensing member into a speed reduction movement of the first auger and the second auger.

[0017] Optionally, the power transmission device includes a power driving part and a transmission reversing part. The power driving part is configured to drive the first auger to rotate and convert the rotation of the sensing member into a speed reduction movement of the first auger. The transmission reversing part is configured to make the second auger rotate in the same speed and in the opposite direction as the first auger.

[0018] Optionally, the power drive unit includes:

[0019] A sun gear, which is rotatably arranged on the crushing body and coaxially and fixedly connected to the core shaft of the sensing member. The sun gear has a preset rotational resistance, so that the sensing member has a preset rotational resistance;

[0020] An external gear ring, which is rotatably arranged on the crushing body and is located outside the sun gear;

[0021] A plurality of planet gears are provided. The plurality of planet gears are evenly distributed along the circumference of the sun gear and are arranged between the sun gear and the external gear ring. The planet gears are meshed with both the external gear ring and the sun gear;

[0022] A power gear, which is rotatably arranged on the crushing body and is externally connected to a driving motor. The power gear is externally meshed with the external gear ring;

[0023] A planet carrier, which is rotatably connected to the planet gears. The first auger is rotatably sleeved outside the core shaft of the sensing member and is fixedly connected to the planet carrier.

[0024] Optionally, the transmission reversing unit includes a large gear, a small gear, an input pulley, an output pulley, a double pulley, a first connecting rod, a second connecting rod, a first belt, and a second belt;

[0025] The input pulley is coaxially and fixedly sleeved outside the rod body of the first auger; [[ID=2�]]

[0026] Both the large gear and the small gear are arranged on the support plate. The large gear is coaxially and fixedly connected to the rod body of the second auger. The small gear is rotatably connected to the support plate. The large gear is meshed with the small gear. The output pulley is coaxially and fixedly connected to the small gear;

[0027] The first connecting rod is rotatably arranged on the crushing body. The double pulley is rotatably connected to the end of the first connecting rod away from the crushing body;

[0028] One end of the second connecting rod is rotatably connected to the small gear, and the other end is rotatably connected to the end of the first connecting rod where the double pulley is installed;

[0029] The first belt is wound between the input pulley and the double pulley, and the second belt is wound between the output pulley and the double pulley.

[0030] The beneficial effects of the present invention are as follows: By setting the feeding device of a sand recycling device for castings as a double-auger feeding, during the feeding process, the first auger and the second auger can extrude the material, pre-crush the material. The pre-crushed material is conveyed to the crushing device and crushed again, reducing the crushing pressure of the crushing device and preventing the material from accumulating at the crushing device.

[0031] Furthermore, the distance between the first auger and the second auger can be adjusted. When the material accumulates inside the crushing screen, the gap between the first auger and the second auger is reduced, so that the extrusion force on the material during the feeding process is increased, thereby improving the pre-crushing effect and further reducing the crushing pressure of the crushing device.

[0032] Furthermore, an induction component is provided inside the crushing screen. When the material inside the crushing screen accumulates, the rotation speed of the first auger and the second auger is reduced through the cooperation of the induction component and the power transmission device, thereby reducing the feeding speed and avoiding further accumulation of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a schematic diagram of the overall structure of a casting sand recovery device according to the present invention;

[0035] Figure 2 This is a front view of a casting sand recovery device according to the present invention;

[0036] Figure 3 It is a structural diagram of the feeding device, power transmission device and induction component in the present invention;

[0037] Figure 4 for Figure 3 Side view of;

[0038] Figure 5 for Figure 3 Front view of

[0039] Figure 6 for Figure 4 Middle AA section view;

[0040] Figure 7 for Figure 5 Stereoscopic view after cutting through the middle BB section;

[0041] Figure 8 for Figure 3 Enlarged view of point C in the middle;

[0042] Figure 9 for Figure 6 Enlarged view of point D in the middle;

[0043] Figure 10 for Figure 7 Enlarged view of point E in the middle.

[0044] In the picture:

[0045] 100, machine base; 110, crushing machine body; 111, feed port; 112, discharge port;

[0046] 200, crushing device; 210, crushing motor; 220, crushing screen; 221, bearing;

[0047] 300. Feeding device;

[0048] 310, first auger; 320, second auger; 330, support plate; 331, sliding shoulder; 332, arc plate; 340, drive cylinder;

[0049] 400, power transmission device;

[0050] 410, power drive unit; 411, sun gear; 412, planet carrier; 413, outer ring gear; 414, planet gear; 415, power gear; 416, drive motor;

[0051] 420, transmission reversing unit; 421, large gear; 422, small gear; 423, input pulley; 424, output pulley; 425, double pulley; 426, first connecting rod; 427, second connecting rod; 428, first belt; 429, second belt;

[0052] 500, induction part; 510, core shaft; 520, induction plate. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] like Figures 1 to 10 As shown, an embodiment of the present invention provides a casting sand recovery device that can crush and screen used molding sand for recycling. The casting sand recovery device is installed in the intelligent production line of the intelligent casting island, receiving used molding sand from the previous process and crushing and screening it. The crushed and screened sand flows into the next process for further processing, and then returns to the front end of the line to participate in casting again. The casting sand recovery device provided by the present invention specifically includes a machine base 100, a crushing device 200, and a feeding device 300.

[0055] A crushing body 110 is provided on a machine base 100. A feeding cavity, a crushing cavity and a discharging cavity that are sequentially communicated are formed inside the crushing body 110. The feeding cavity is located on one side of the crushing cavity, and the discharging cavity is located at the bottom of the crushing cavity. An inlet 111 and an outlet 112 are provided on the crushing body 110. The inlet 111 communicates with the feeding cavity, and the outlet 112 communicates with the discharging cavity.

[0056] A crushing device 200 is arranged in the crushing cavity and configured to be able to crush materials.

[0057] The feeding device 300 includes a first auger 310 and a second auger 320 arranged in the feeding cavity. The first auger 310 and the second auger 320 extend along a first direction and are arranged along a second direction. The first direction is the conveying direction of the materials from the feeding cavity to the crushing cavity, and the second direction is perpendicular to the first direction. Both the first auger 310 and the second auger 320 can rotate around their own axes. The first auger 310 and the second auger 320 have opposite helix directions and opposite rotation directions to convey the materials to the crushing device 200. The projections of the blades of the first auger 310 and the blades of the second auger 320 on a projection plane (vertical projection plane) perpendicular to their axes at least partially overlap.

[0058] In the process of using the solution of this embodiment, the materials are put into the feeding cavity through the inlet 111 and fall between the blades of the first auger 310 and the second auger 320. The first auger 310 and the second auger 320 rotate in opposite directions to convey the materials to the crushing device 200. During the feeding process, due to the partial overlap of the projections of the blades of the first auger 310 and the blades of the second auger 320 on the vertical projection plane, the materials are squeezed during the conveying process to achieve pre-crushing. After that, the materials reach the crushing device 200 and are re-crushed under the action of the crushing device 200. The qualified materials after crushing are discharged from the outlet 112. That is to say, through the arrangement of the first auger 310 and the second auger 320, the solution of this embodiment realizes pre-crushing during the conveying process, reduces the crushing pressure of the crushing device 200, improves the crushing effect, increases the crushing efficiency, and avoids the accumulation of materials at the crushing device 200.

[0059] In a further embodiment, the crushing device 200 includes a crushing screen 220 and a crushing motor 210. The crushing screen 220 is disposed in the crushing chamber. The crushing screen 220 is cylindrical and its axis is parallel to the axes of the first auger 310 and the second auger 320. The crushing screen 220 can rotate about its own axis. At least one end of the crushing screen 220 close to the feeding chamber is open, and thus communicates with the feeding chamber to facilitate the entry of materials into its interior. The crushing motor 210 is disposed on the crushing body 110 and its output end is connected to the crushing screen 220, and thus can drive the crushing screen 220 to rotate. The materials are transported by the first auger 310 and the second auger 320 and then enter the crushing screen 220, and are lifted and dropped under the rotation of the crushing screen 220 to achieve re-crushing. Further, a bearing 221 is provided at the connection between the crushing screen 220 and the crushing body 110, and the friction resistance at the connection between the crushing screen 220 and the crushing body 110 is reduced through the bearing 221, and thus the rotation resistance of the crushing screen 220 is reduced.

[0060] In a further embodiment, the distance between the first auger 310 and the second auger 320 can be adjusted, and is configured to be negatively correlated with the degree of material accumulation in the crushing screen 220. That is, as the degree of material accumulation in the crushing screen 220 increases, the distance between the first auger 310 and the second auger 320 is reduced, so that the extrusion force received by the materials during transportation is increased, the pre-crushing effect of the first auger 310 and the second auger 320 on the materials is improved, and the crushing pressure on the crushing screen 220 is further reduced.

[0061] To realize the adjustment of the distance between the first auger 310 and the second auger 320, in a preferred embodiment of the present invention, a support plate 330 is provided in the feeding chamber. The support plate 330 can be slidably disposed on the crushing body 110 in the radial direction of the first auger 310 and the second auger 320. The second auger 320 is rotatably disposed on the support plate 330. A driving cylinder 340 is provided on the crushing body 110. The output end of the driving cylinder 340 is connected to the support plate 330 to push the support plate 330 to move, and thus push the second auger 320 to approach or move away from the first auger 310, so as to realize the adjustment of the distance between the first auger 310 and the second auger 320. Preferably, the driving cylinder 340 can be set as a pneumatic cylinder, a hydraulic cylinder or other power elements that can achieve the same function. Further, to facilitate the sliding of the support plate 330, sliding shoulders 331 are provided at the upper and lower ends of the support plate 330, and guiding sliding grooves are provided at the corresponding positions on the inner top surface and the bottom surface of the crushing body 110. The sliding shoulders 331 are slidably disposed in the guiding sliding grooves.

[0062] Further, an arc plate 332 is connected to one side of the support plate 330. The arc plate 332 is located in the feeding cavity. The inner diameter of the arc plate 332 is adapted to the outer diameter of the second auger 320. When the support plate 330 moves, it drives the arc plate 332 and the second auger 320 to move synchronously, avoiding leakage of materials during the conveying process caused by the gap between the second auger 320 and the inner wall of the feeding cavity after the second auger 320 moves.

[0063] It should also be added that the sand reclamation equipment for castings of the present invention further includes a sensor (not shown in the figure), and the sensor is configured to be able to sense the rotation speed of the first auger 310 or the second auger 320, and then control the action of the driving cylinder 340.

[0064] In a further embodiment, an induction member 500 is arranged in the crushing screen 220. The induction member 500 includes a core shaft 510 and induction plates 520 uniformly arranged on the core shaft 510 in the circumferential direction. The induction plates 520 extend along the radial direction of the core shaft 510, and the core shaft 510 is coaxial with the crushing screen 220; the induction member 500 can rotate around its own axis and has a preset rotational resistance. When the materials in the crushing screen 220 accumulate to contact the induction plates 520, the materials rotate with the crushing screen 220 and push the induction member 500 to rotate through the induction plates 520.

[0065] The sand reclamation equipment for castings of the present invention further includes a power transmission device 400, and the power transmission device 400 is configured to be able to drive the first auger 310 and the second auger 320 to rotate at the same speed in opposite directions and be able to convert the rotation of the induction member 500 into a speed reduction movement of the first auger 310 and the second auger 320.

[0066] In the solution of this embodiment, the power transmission device 400 drives the first auger 310 and the second auger 320 to rotate at the same speed in opposite directions to convey the materials to the crushing screen 220. During the conveying process, the first auger 310 and the second auger 320 squeeze the materials to achieve preliminary crushing. After the materials reach the crushing screen 220, they are crushed again under the rotation of the crushing screen 220; at the same time, by arranging the induction member 500 in the crushing screen 220, when the materials in the crushing screen 220 accumulate to a certain extent, the materials contact the induction plates 520. During the process of the materials rotating with the crushing screen 220, the materials give a force to the induction member 500 through the induction plates 520 to make the induction member 500 rotate. The rotation of the induction member 500 reduces the rotation speed of the first auger 310 and the second auger 320 through the power transmission device 400, thereby reducing the feeding speed and avoiding further accumulation of materials in the crushing screen 220.

[0067] In a further embodiment, the power transmission device 400 includes a power driving part 410 and a transmission reversing part 420. The power driving part 410 is configured to drive the first auger 310 to rotate and convert the rotation of the sensing member 500 into a speed reduction movement of the first auger 310; the transmission reversing part 420 is configured to make the second auger 320 rotate at the same speed and in the opposite direction as the first auger 310.

[0068] Preferably, in the present invention, the power driving part 410 includes a power gear 415, a sun gear 411, a planetary gear 414, an outer gear ring 413 and a planetary carrier 412;

[0069] The sun gear 411 is rotatably arranged on the crushing body 110 and is coaxially and fixedly connected to the core shaft 510 of the sensing member 500. The sun gear 411 has a preset rotational resistance, so that the sensing member 500 has a preset rotational resistance;

[0070] The outer gear ring 413 is rotatably arranged on the crushing body 110 and is located outside the sun gear 411;

[0071] There are multiple planetary gears 414. The multiple planetary gears 414 are evenly distributed along the circumference of the sun gear 411 and are arranged between the sun gear 411 and the outer gear ring 413. The planetary gears 414 are meshed with both the outer gear ring 413 and the sun gear 411;

[0072] The planetary carrier 412 is rotationally connected to the planetary gears 414. The first auger 310 is rotatably sleeved outside the core shaft 510 of the sensing member 500 and is fixedly connected to the planetary carrier 412; it can be understood that, for the convenience of the rotational connection between the first auger 310 and the sensing member 500, the rod body of the first auger 310 is hollow inside and is sleeved outside the core shaft 510 of the sensing member 500;

[0073] The power gear 415 is rotatably arranged on the crushing body 110 and is externally connected to a driving motor 416. The power gear 415 is externally meshed with the outer gear ring 413, so as to be able to transmit power to the outer gear ring 413.

[0074] The transmission reversing part 420 includes a large gear 421, a small gear 422, an input pulley 423, an output pulley 424, a double pulley 425, a first connecting rod 426, a second connecting rod 427, a first belt 428 and a second belt 429;

[0075] The input pulley 423 is coaxially and fixedly sleeved outside the rod body of the first auger 310;

[0076] Both the large gear 421 and the small gear 422 are arranged on the support plate 330. The large gear 421 is coaxially and fixedly connected to the rod body of the second auger 320. The small gear 422 is rotatably connected to the support plate 330. The large gear 421 is meshed with the small gear 422. The output pulley 424 is coaxially and fixedly connected to the small gear 422;

[0077] The first connecting rod 426 is rotatably arranged on the crushing body 110, and the double pulley 425 is rotatably connected to one end of the first connecting rod 426 away from the crushing body 110;

[0078] One end of the second connecting rod 427 is rotatably connected to the pinion 422, and the other end is rotatably connected to the end of the first connecting rod 426 where the double pulley 425 is installed;

[0079] The first belt 428 is wound between the input pulley 423 and the double pulley 425, and the second belt 429 is wound between the output pulley 424 and the double pulley 425.

[0080] It should be added that for the convenience of manufacturing, the output pulley 424 and the pinion 422 are integrally formed. A rotating column is provided on the support plate 330. The output pulley 424 and the pinion 422 are rotatably arranged on the rotating column, and one end of the second connecting rod 427 is rotatably arranged on the rotating column. During the synchronous rotation of the first auger 310 with the planet carrier 412, the first auger 310 drives the input pulley 423 to rotate. The input pulley 423 drives the output pulley 424 to rotate through the transmission of the first belt 428 and the second belt 429. The output pulley 424 drives the pinion 422 to rotate, the pinion 422 drives the large gear 421 to rotate, and the large gear 421 drives the second auger 320 to rotate, realizing the same-speed and reverse rotation of the first auger 310 and the second auger 320.

[0081] The settings of the first connecting rod 426 and the second connecting rod 427 can adapt to the movement of the second auger 320.

[0082] Combined with the above embodiments, the working principle and process of the present invention are as follows:

[0083] In the initial state, the motor drives the power gear 415 to rotate, and the power reaches the outer gear ring 413. Since the rotational friction of the sun gear 411 is relatively large, in the initial state, the outer gear ring 413 drives the planet carrier 412 to rotate. The planet carrier 412 drives the first auger 310 to rotate. The rotation of the first auger 310 drives the pinion 422 to rotate through the first belt 428 and the second belt 429. The pinion 422 drives the large gear 421 to rotate, and the large gear 421 drives the second auger 320 to rotate at the same speed and in the opposite direction as the first auger 310. Materials are added into the feeding port 111. The materials are conveyed to the crushing screen 220 through the first auger 310 and the second auger 320, and are pre-crushed during the conveying process. After the materials reach the crushing screen 220, they are crushed again under the rotation of the crushing screen 220. The crushed qualified materials fall into the discharge cavity through the screening of the crushing screen 220 and are discharged through the discharge port 112.

[0084] When there is a large amount of material inside the crushing screen 220, the material contacts the induction plate 520. When the material is driven by the crushing screen 220 to rotate, the induction member 500 rotates through the induction plate 520. The induction member 500 drives the sun gear 411 to rotate synchronously. Since the rotation directions of the sun gear 411 and the external gear ring 413 are opposite, the rotation speed of the planet carrier 412 slows down, and the material feeding speed becomes slower. At this time, the control system controls the driving cylinder 340 to extend, so that the support plate 330 slides relative to the crushing body 110. The support plate 330 drives the second auger 320 to move towards the first auger 310. The distance between the first auger 310 and the second auger 320 decreases, and the extrusion force on the material after entering becomes larger, improving the effect of pre-crushing the material and further preventing material accumulation.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molding sand recycling device for castings, characterized in that, Comprising: A machine base, on which a crushing body is provided. Inside the crushing body, a feeding cavity, a crushing cavity and a discharging cavity are formed in sequence and communicated with each other. The feeding cavity is located on one side of the crushing cavity, the discharging cavity is located at the bottom of the crushing cavity. An inlet and an outlet are provided on the crushing body. The inlet is communicated with the feeding cavity, and the outlet is communicated with the discharging cavity; A crushing device, which is arranged in the crushing cavity and configured to be able to crush materials; A feeding device, which includes a first auger and a second auger arranged in the feeding cavity. The first auger and the second auger extend along a first direction and are arranged along a second direction. The first direction and the second direction are perpendicular. Both the first auger and the second auger can rotate around their own axes. The first auger and the second auger have opposite helix directions and opposite rotation directions to convey materials to the crushing device. The projections of the blades of the first auger and the blades of the second auger on the projection plane perpendicular to their axes at least partially overlap; The crushing device includes a crushing screen and a crushing motor. The crushing screen is arranged in the crushing cavity. The crushing screen is cylindrical and its axis is parallel to the axes of the first auger and the second auger. The crushing screen can rotate around its own axis. At least one end of the crushing screen close to the feeding cavity is open and communicated with the feeding cavity. The crushing motor is arranged on the crushing body and its output end is connected to the crushing screen; The distance between the first auger and the second auger can be adjusted and is configured to be negatively correlated with the material accumulation degree in the crushing screen. A support plate is arranged in the feeding cavity. The support plate can be slidably arranged on the crushing body along the radial direction of the first auger and the second auger. The second auger is rotatably arranged on the support plate. A driving cylinder is arranged on the crushing body, and the output end of the driving cylinder is connected to the support plate; An induction member is arranged in the crushing screen. The induction member includes a core shaft and induction plates uniformly arranged on the core shaft along the circumferential direction. The induction plates extend along the radial direction of the core shaft. The core shaft is coaxial with the crushing screen. The induction member can rotate around its own axis and has a preset rotational resistance. When the materials in the crushing screen accumulate to contact the induction plates, the materials rotate with the crushing screen and push the induction member to rotate through the induction plates; The casting sand recycling equipment further includes a power transmission device, which is configured to be able to drive the first auger and the second auger to rotate at the same speed in opposite directions and be able to convert the rotation of the induction member into a speed reduction movement of the first auger and the second auger.

2. The sand reclaiming equipment for castings according to claim 1, characterized in that, An arc plate is connected to one side of the support plate. The arc plate is located in the feeding cavity, and the inner diameter of the arc plate is adapted to the outer diameter of the second auger.

3. The sand recycling equipment for castings according to claim 1, characterized in that, The casting sand recycling equipment further includes a sensor, which is configured to be able to sense the rotation speed of the first auger or the second auger, and then control the action of the driving cylinder.

4. The sand recycling equipment for castings according to claim 1, characterized in that, The power transmission device includes a power driving part and a transmission reversing part. The power driving part is configured to drive the first auger to rotate and convert the rotation of the induction member into a speed reduction movement of the first auger; the transmission reversing part is configured to make the second auger rotate at the same speed in the opposite direction as the first auger.

5. The sand reclaiming device for casting as claimed in claim 4, wherein, The power driving part includes: A sun gear, which is rotatably arranged on the crushing body and coaxially fixedly connected to the core shaft of the induction member. The sun gear has a preset rotational resistance, so that the induction member has a preset rotational resistance; An outer gear ring, which is rotatably arranged on the crushing body and located outside the sun gear; Planet gears, multiple of them are provided, and the multiple planet gears are evenly distributed along the circumference of the sun gear and are arranged between the sun gear and the external gear ring. The planet gears are meshed with both the external gear ring and the sun gear; The power gear is rotatably arranged on the crushing body and is externally connected to a driving motor. The power gear is externally meshed with the external gear ring; The planet carrier is rotatably connected to the planet gears. The first auger is rotatably sleeved outside the core shaft of the sensing member and is fixedly connected to the planet carrier.

6. The sand reclaiming equipment for castings according to claim 4, wherein, The transmission reversing part includes a large gear, a small gear, an input pulley, an output pulley, a double pulley, a first connecting rod, a second connecting rod, a first belt, and a second belt; The input pulley is coaxially and fixedly sleeved outside the rod body of the first auger; Both the large gear and the small gear are arranged on the support plate. The large gear is coaxially and fixedly connected to the rod body of the second auger. The small gear is rotatably connected to the support plate. The large gear is meshed with the small gear. The output pulley is coaxially and fixedly connected to the small gear; The first connecting rod is rotatably arranged on the crushing body. The double pulley is rotatably connected to the end of the first connecting rod away from the crushing body; One end of the second connecting rod is rotatably connected to the small gear, and the other end is rotatably connected to the end of the first connecting rod where the double pulley is installed; The first belt is wound between the input pulley and the double pulley, and the second belt is wound between the output pulley and the double pulley.

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