A sand-falling machine for casting

Abstract

The invention discloses a sand-falling machine for casting, comprising a fixed bottom box, a vibrating sand-falling box and a sand-cleaning box; a crushing roller, a screen plate and a sand conveyor belt are sequentially arranged below the vibrating sand-falling box from top to bottom; a first conveying track and a second conveying track are arranged on the vibrating sand-falling box; a coverless box body for contact sand-falling between a workpiece and large sand particles is arranged below the second conveying track; a third conveying track is arranged inside the sand-cleaning box; sand-blasting tubes are arranged above and below the third conveying track, respectively; the sand-falling machine for casting in the invention is used for sand-falling treatment after casting and cooling, and for crushing and screening the fallen molding sand to obtain large-grain sand particles and small-grain sand particles; the large-grain sand particles are used for contact sand-falling inside the coverless box body, and small-grain sand particles are formed in the process of helping the workpiece to fall sand particles; the small-grain sand particles are used for sand-blasting in the sand-cleaning box, which is beneficial to subsequent sand recovery and has practical functions.

Description

Technical Field

[0001] The invention relates to the technical field of casting processing equipment, in particular to a sand-falling machine for casting. Background Art

[0002] In the casting process, after the metal is poured into the sand mold and cooled and formed, it needs to be sanded out, that is, the sand attached to the surface of the casting is removed. After the sand is removed, the sand separated from the workpiece can be recycled, reducing the consumption of raw materials and environmental impact, and reducing production costs. In the process of sand recovery, the sand needs to be cooled, crushed, rolled, impurity-removed and ground to obtain clean small-grained sand, which is then mixed with new sand raw materials for use.

[0003] A sand-falling machine is a device used to clean sand particles from the surface of castings. The vibrating sand-falling machine removes sand particles from castings through vibration, and has a high sand-falling efficiency. However, after vibrating the sand-falling machine, some sand blocks or large sand particles always remain on the surface of the workpiece, which need to be removed manually by knocking or by air shovel, and the process is cumbersome. After sand-falling, the surface of the workpiece needs to be cleaned by shot peening or other cleaning treatments to obtain a smooth surface workpiece. Summary of the invention

[0004] Aiming at the incomplete sand dropping of a vibration sand dropping machine, the present invention provides a casting sand dropping machine, which collects the molding sand grains obtained after the sand dropping, and uses the collected molding sand grains to clean the surface of the workpiece after the vibration sand dropping.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A casting sand-falling machine comprises a fixed bottom box and a vibrating sand-falling box located above the fixed bottom box, the vibrating sand-falling box is connected to the fixed bottom box through a first elastic support member, a conveying track for placing workpieces is arranged on the vibrating sand-falling box, and when the vibrating sand-falling box vibrates, the workpieces perform sand-falling and walking discharge on the conveying track. The conveying track comprises a first conveying track fixedly connected to the vibrating sand-falling box and a second conveying track slidably connected to the vibrating sand-falling box in a vertical direction, and a feeding end of the second conveying track is connected to a discharging end of the first conveying track.

[0007] Furthermore, a combined bottom plate and an isolation guide plate are provided inside the vibrating sand-falling box; the combined bottom plate is located below the second conveying track and parallel to the conveying direction of the second conveying track; the isolation guide plate and the three side walls of the vibrating sand-falling box are respectively connected to the combined bottom plate and vertically arranged; the combined bottom plate, the isolation guide plate and the three side walls of the vibrating sand-falling box form an uncovered box body; the second conveying track is located inside the uncovered box body to realize the contact sand-falling of the workpiece on the second conveying track.

[0008] Furthermore, a sand cleaning box is arranged on the upper part of the fixed bottom box, a third conveying track is arranged inside the sand cleaning box, a feeding end of the third conveying track is connected with a discharging end of the second conveying track, and sand blasting pipes are arranged above and below the third conveying track respectively in the sand cleaning box.

[0009] Furthermore, a crushing roller for crushing sand blocks to form sand particles, a screen plate for screening sand particles and a sand conveyor belt for conveying sand particles are arranged in sequence from top to bottom below the vibrating sand falling box. A first box body is arranged at the discharge end of the screen plate, and a second box body is arranged at the discharge end of the sand conveyor belt. The first box body is connected to the uncovered box body through a first reflux pipe, and the second box body is connected to the sandblasting pipe of the sand cleaning box through a second reflux pipe.

[0010] Preferably, the combined bottom plate comprises a fixed bottom plate and a movable bottom plate which are arranged parallel and close to each other, the fixed bottom plate is located above the movable bottom plate, and the movable bottom plate is slidably connected to the fixed bottom plate in the horizontal direction. A first sand leakage hole is arranged on the fixed bottom plate, and a second sand leakage hole which is used to match the first sand leakage hole is arranged on the movable bottom plate. The first sand leakage hole and the second sand leakage hole are connected to realize the unsealed state of the combined bottom plate, and the first sand leakage hole and the second sand leakage hole are disconnected to realize the sealed state of the combined bottom plate.

[0011] Preferably, one side of the movable bottom plate is rotatably connected to the second adjusting screw, a threaded seat matching the second adjusting screw is provided on the vibrating sand-falling box, and the second adjusting screw is threadedly connected to the threaded seat to realize horizontal position movement of the movable bottom plate.

[0012] Preferably, it is characterized in that an adjusting slider and a first adjusting screw threadedly connected to the adjusting slider are provided on the vibrating sand box, the first adjusting screw is vertically arranged, the adjusting slider is fixedly connected to the second conveying track, and the first adjusting screw forms the vertical movement of the second conveying track by rotation.

[0013] Preferably, an upper sandblasting seat and an upper sandblasting tube are arranged above the third conveying track of the sand cleaning box, and a lower sandblasting seat and a lower sandblasting tube are arranged below the third conveying track. The upper sandblasting tube and the lower sandblasting tube are positioned correspondingly and are respectively located between the third conveying rollers of the third conveying track.

[0014] Preferably, a sand outlet pipe for discharging sand particles is provided at the bottom of the sand cleaning box, and the sand outlet pipe is connected to the first box body through a first material guide pipe and is connected to the second box body through a second material guide pipe.

[0015] The beneficial effects of the present invention are:

[0016] 1. This casting sand-falling machine is used for sand-falling treatment after casting and cooling. This sand-falling machine vibrates and shakes out the combination of the workpiece and the sand mold through a vibrating sand-falling box, so that the molding sand on the surface of the workpiece falls off, and the fallen molding sand is crushed and screened to obtain large-grained sand and small-grained sand, which is beneficial to the subsequent sand recovery; at the same time, the large-grained sand is used for the contact sand-falling of the workpiece inside the uncovered box, and the small-grained sand is used for the sandblasting work of the sand cleaning box to ensure that the performance of the sand is fully utilized.

[0017] 2. An uncovered box is arranged inside the vibrating sand-falling box of the casting sand-falling machine. Large sand particles can be introduced into the uncovered box. The large sand particles can rub against the surface of the workpiece to remove sand blocks or sand particles on the surface of the workpiece, thereby realizing friction sand-falling of the workpiece inside the uncovered box. At the same time, the large sand particles will be broken into small sand particles during the friction process, which is beneficial to the subsequent sand recovery.

[0018] 3. The small sand particles obtained by this casting sand falling machine can be used for sand blasting cleaning of workpieces. Using the sand particles of molding sand as shot blasting raw materials can save glass bead raw materials. At the same time, the sand material after sand blasting cleaning will be broken into smaller particles, and richer sand material particle size can be obtained when the molding sand particles are recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the casting sand-falling machine;

[0020] Figure 2 This is a schematic diagram of the internal structure of the casting sand-falling machine;

[0021] Figure 3 This is a schematic diagram of the structure of the section AA of the casting shakeout machine;

[0022] Figure 4 This is a schematic diagram of the structure inside the vibrating sand-falling box of the casting sand-falling machine;

[0023] Figure 5 This is a schematic diagram of the structure of the vibrating sand box of the casting sand-falling machine when contacting and shaking out the sand;

[0024] Figure 6 This is a schematic diagram of the structure of the cross section at BB of the casting shakeout machine;

[0025] Figure 7 This is a schematic diagram of the structure of the cross section at CC of the casting sand-falling machine.

[0026] In the figure: 1, fixed bottom box; 2, vibrating sand falling box; 3, sand cleaning box; 4, first conveying track; 5, second conveying track; 6, third conveying track; 7, fixed bottom plate; 8, movable bottom plate; 9, isolation guide plate; 10, first elastic support member; 11, crushing roller; 12, screen plate; 13, sand conveyor belt; 14, first box body; 15, second box body; 16, first return pipe; 17, second return pipe; 18, sand outlet pipe; 19, telescopic sleeve;

[0027] 21. Workpiece guide plate; 22. Sand guide plate; 23. Adjustment slider; 24. First adjustment screw; 25. Handle; 26. Support rod; 27. Threaded seat; 31. Upper sandblasting seat; 32. Upper sandblasting tube; 33. Lower sandblasting seat; 34. Lower sandblasting tube; 35. Isolation curtain; 41. First conveying roller; 51. Second conveying roller; 61. Third conveying roller; 71. First sand leakage hole; 81. Second sand leakage hole; 82. Second elastic support member; 83. Second adjustment screw; 91. Isolation plate; 92. Material guide plate; 121. Third elastic support member; 131. Baffle; 161. Hose; 162. Discharge pipe; 181. First material guide pipe; 182. Second material guide pipe. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1 A sand-falling machine for casting includes a fixed bottom box 1, a vibrating sand-falling box 2 and a sand-cleaning box 3. The vibrating sand-falling box 2 is located above the fixed bottom box 1 and connected to the fixed bottom box 1 through a first elastic support member 10. Figure 3 A telescopic sleeve 19 can be arranged between the fixed bottom box 1 and the vibrating sand-falling box 2 to seal the fixed bottom box 1 and the vibrating sand-falling box 2. A conveying track for placing workpieces is arranged inside the vibrating sand-falling box 2. A vibration motor is arranged on the vibrating sand-falling box 2 to form the vibration of the vibrating sand-falling box 2, so as to realize the vibration sand-falling of the workpieces on the conveying track of the vibrating sand-falling box 2. At the same time, the vibration direction of the vibration motor can make the workpieces move in the discharge direction of the conveying track.

[0030] refer to Figure 2The conveying tracks inside the vibration sand-falling box 2 include a first conveying track 4 and a second conveying track 5. A third conveying track 6 is arranged inside the sand-cleaning box 3. The first conveying track 4, the second conveying track 5 and the third conveying track 6 are connected in sequence. A workpiece guide plate 21 is arranged between the second conveying track 5 and the third conveying track 6. The workpiece guide plate 21 is used to guide the workpiece on the second conveying track 5 to the third conveying track 6. The workpiece completes vibration sand-falling on the first conveying track 4, completes contact sand-falling on the second conveying track 5, and performs sandblasting cleaning on the third conveying track 6.

[0031] The first conveying track 4 is fixedly connected to the inner wall of the vibrating shakeout box 2 , and a plurality of first conveying rollers 41 are fixedly arranged on the first conveying track 4 , and the plurality of first conveying rollers 41 are located in the same conveying plane.

[0032] refer to Figure 4 , Figure 5 and Figure 6 , a plurality of second conveying rollers 51 are fixedly arranged on the second conveying track 5, and the plurality of second conveying rollers 51 are located in the same conveying plane, and the second conveying track 5 is slidably connected with the vibrating sand box 2 in the vertical direction. Specifically, a threaded subassembly for adjusting the position of the second conveying track 5 is arranged on the vibrating sand box 2, and the threaded subassembly includes an adjusting slider 23 and a first adjusting screw 24, and the first adjusting screw 24 is threadedly connected with the adjusting slider 23. The adjusting slider 23 is slidably connected with the vibrating sand box 2 in the vertical direction, and the adjusting slider 23 is fixedly connected with the second conveying track 5, and the first adjusting screw 24 is vertically arranged and rotatably connected with the vibrating sand box 2, and the bottom of the first adjusting screw 24 extends to the bottom of the vibrating sand box 2, and a handle 25 is arranged at the bottom of the first adjusting screw 24, and the rotation of the first adjusting screw 24 is formed by rotating the handle 25, thereby realizing the movement of the second conveying track 5 in the vertical direction.

[0033] refer to Figure 4 and Figure 5 A combined bottom plate and an isolation guide plate 9 are arranged inside the vibrating sand box 2. The combined bottom plate is located below the second conveying track 5. The conveying direction of the second conveying track 5 is parallel to the combined bottom plate. The isolation guide plate 9 is fixedly connected to the vibrating sand box 2. The isolation guide plate 9 includes a vertically arranged isolation plate 91 and an inclinedly arranged material guide plate 92. The material guide plate 92 is used to assist in guiding the workpiece when the workpiece enters the second conveying track 5 from the first conveying track 4.

[0034] Furthermore, the isolation plate 91 of the isolation guide plate 9 and the three side walls of the vibrating sand-falling box 2 are respectively arranged vertically with the combined bottom plate and connected to the combined bottom plate, and the combined bottom plate, the isolation guide plate 9 and the three side walls of the vibrating sand-falling box 2 form an uncovered box. When the second conveying track 5 is used for vibrating sand-falling, the second conveying roller 51 of the second conveying track 5 and the first conveying roller 41 of the first conveying track 4 are in the same horizontal plane, and the second conveying track 5 is located above the uncovered box; when the second conveying track 5 is used for contact sand-falling, the second conveying track 5 is located inside the uncovered box, and the workpiece on the second conveying track 5 is submerged in the friction material of the uncovered box. Through the vibration of the vibrating sand-falling box 2, the workpiece forms contact friction with the large-grained sand, which is conducive to the separation of sand or sand blocks on the workpiece, and realizes friction sand-falling of the workpiece.

[0035] refer to Figure 4 and Figure 5 The above-mentioned combined bottom plate includes a fixed bottom plate 7 and a movable bottom plate 8, wherein the fixed bottom plate 7 and the movable bottom plate 8 are arranged parallel and close to each other, and the fixed bottom plate 7 is located above the movable bottom plate 8. The fixed bottom plate 7 is fixedly connected to the inner wall of the vibrating sand-falling box 2, and the movable bottom plate 8 is slidably connected to the fixed bottom plate 7 in the horizontal direction. The vibrating sand-falling box 2 is provided with a support rod 26 below the movable bottom plate 8, and the support rod 26 is used to support the combined bottom plate to increase the supporting strength of the combined bottom plate.

[0036] Further, one end of the movable bottom plate 8 is rotatably connected to the second adjusting screw 83, and a threaded seat 27 is provided on the vibrating sand box 2, the threaded seat 27 matches the second adjusting screw 83, and the second adjusting screw 83 is threadedly connected to the threaded seat 27, and the relative position between the movable bottom plate 8 and the fixed bottom plate 7 can be adjusted by rotating the second adjusting screw 83. The other end of the movable bottom plate 8 is connected to the fixed bracket of the vibrating sand box 2 through the second elastic support member 82, and the second elastic support member 82 is used to prevent the second adjusting screw 83 from loosening.

[0037] Furthermore, a first sand leakage hole 71 is provided on the fixed bottom plate 7, and a second sand leakage hole 81 is provided on the movable bottom plate 8. The second sand leakage hole 81 is used to match the first sand leakage hole 71 to form a sealed and unsealed state of the combined bottom plate. When the first sand leakage hole 71 is connected to the second sand leakage hole 81, the combined bottom plate is in an unsealed state. Through vibration, large particles of sand and gravel inside the uncovered box can be discharged from the first sand leakage hole 71 and the second sand leakage hole 81. When the first sand leakage hole 71 is not connected to the second sand leakage hole 81, the combined bottom plate is in a sealed state.

[0038] refer to Figure 1 , Figure 2 and Figure 7A sand cleaning box 3 is arranged on the upper part of the fixed bottom box 1, an upper sandblasting seat 31 and an upper sandblasting tube 32 are arranged above the third conveying track 6 inside the sand cleaning box 3, a plurality of upper sandblasting tubes 32 are arranged on the upper sandblasting seat 31, a lower sandblasting seat 33 and a lower sandblasting tube 34 are arranged below the third conveying track 6, and a plurality of lower sandblasting tubes 34 are arranged on the lower sandblasting seat 33. The upper sandblasting seat 31 and the lower sandblasting tube 34 are respectively provided with corresponding spray guns for sandblasting the lower sandblasting seat 33 and the lower sandblasting tube 34. Through sandblasting, the lower sandblasting seat 33 and the lower sandblasting tube 34 can respectively perform sandblasting on the workpiece on the third conveying track 6 to further clean the surface of the workpiece. The upper sandblasting tube 32 and the lower sandblasting tube 34 correspond to each other and are respectively located between the third conveying rollers 61 of the third conveying track 6, which can reduce the shielding of the workpiece by the third conveying roller 61 during sandblasting.

[0039] The sand cleaning box 3 is provided with isolation curtains 35 on both sides of the workpiece conveying direction, and a sandblasting processing space is formed between the isolation curtains 35. The isolation curtains 35 are used to isolate the small sand particles inside the sand cleaning box 3 to prevent the small sand particles from splashing out of the sand cleaning box 3.

[0040] refer to Figure 2 and Figure 3 , the interior of the fixed bottom box 1 is sequentially provided with a crushing roller 11, a screen plate 12 and a sand conveyor belt 13 from top to bottom. A sand guide plate 22 is provided at the bottom of the vibrating sand box 2, and the sand guide plate 22 is used to guide the sand to the top of the feeding end of the crushing roller 11. The crushing roller 11 is used to crush the sand blocks falling on the conveying track of the vibrating sand box 2 to form sand. The screen plate 12 is connected to the fixed bottom box 1 through a third elastic support 121. The screen plate 12 is equipped with a corresponding screening motor. The screen plate 12 is used to screen the sand coming out of the crushing roller 11 to obtain sand that meets the sandblasting size. The sand conveyor belt 13 conveys materials through the rotation of two conveying wheels. The fixed bottom box 1 is provided with a conveying motor that drives the conveying wheel to rotate. The conveying motor is used to drive the conveying wheel to rotate to realize the material conveyance of the sand conveyor belt 13. The sand conveyor belt 13 is used to convey the sand that passes through the screen plate 12 . Baffles 131 are provided on both sides of the sand conveyor belt 13 to prevent the sand from falling from both sides of the sand conveyor belt 13 .

[0041] Furthermore, a first box 14 is provided at the discharge end of the sieve plate 12, and the first box 14 is used to receive large sand particles that have not passed through the sieve plate 12. A first return pipe 16 is provided on the fixed bottom box 1, and the first return pipe 16 is a spiral conveying pipe. A first spiral blade is provided inside the first return pipe 16, and a first conveying motor (not shown in the figure) for driving the first spiral blade to rotate is provided on the fixed bottom box 1. The first spiral blade is driven to rotate by the first conveying motor to realize the transportation of the material inside the first return pipe 16. The feed end of the first return pipe 16 is located inside the first box 14, and a discharge pipe 162 is provided at the discharge end of the first return pipe 16. The discharge pipe 162 is fixedly connected to the vibrating sand box 2, and the discharge pipe 162 is connected to the first return pipe 16 by a hose 161, which is used to assist the discharge pipe 162 to adapt to the vibration of the vibrating sand box 2. The discharge pipe 162 is located above the second conveying track 5, and the first return pipe 16 can guide the large-grained sand inside the first box body 14 into the uncovered box body at the bottom of the second conveying track 5 to form friction material inside the uncovered box body.

[0042] Furthermore, a second box 15 is provided at the discharge end of the sand conveyor belt 13, and a second return pipe 17 is provided on the fixed bottom box 1. The second return pipe 17 is a spiral conveying pipe, and a second spiral blade is provided inside the second return pipe 17. A second conveying motor (not shown in the figure) for driving the second spiral blade to rotate is provided on the fixed bottom box 1. The second conveying motor drives the second spiral blade to rotate to realize the transportation of the material inside the second return pipe 17. The feed end of the second return pipe 17 is located inside the second box 15, and the discharge end of the second return pipe 17 is connected to the feed bin of the spray gun corresponding to the upper sandblasting seat 31 and the lower sandblasting tube 34. After passing through the spray gun, the sand in the feed bin can be quickly sprayed out from the upper sandblasting tube 32 and the lower sandblasting tube 34 to realize sandblasting. The above-mentioned second return pipe 17 is used to introduce the small-grained sand inside the second box 15 into the upper sandblasting seat 31 and the lower sandblasting tube 34 of the sand cleaning box 3 to form sandblasting materials.

[0043] refer to Figure 2A sand outlet pipe 18 is provided at the bottom of the sand cleaning box 3, and the sand outlet pipe 18 is used for discharging sand particles. The sand outlet pipe 18 is connected to the first box body 14 through a first material guide pipe 181, and the first material guide pipe 181 is used to discharge the unused sand from the first box body 14; the sand outlet pipe 18 is connected to the second box body 15 through a second material guide pipe 182, and the second material guide pipe 182 is used to discharge the unused sand from the second box body 15. The first material guide pipe 181 and the second material guide pipe 182 are both spiral conveying pipes. A third spiral blade is provided inside the first material guide pipe 181, and a third conveying motor (not shown in the figure) for driving the third spiral blade to rotate is provided on the fixed bottom box 1, and the third conveying motor drives the third spiral blade to rotate to realize the transportation of the material inside the first material guide pipe 181. A fourth spiral blade is arranged inside the second material guide pipe 182, and a fourth conveying motor (not shown in the figure) for driving the fourth spiral blade to rotate is arranged on the fixed bottom box 1. The fourth conveying motor drives the fourth spiral blade to rotate to realize the transportation of materials inside the second material guide pipe 182.

[0044] The working process of the casting sand-falling machine in this embodiment comprises the following steps:

[0045] Step 1: Start the vibration motor on the vibrating sand-falling box 2, and the workpiece wrapped in the sand mold is placed on the first conveying track 4. The workpiece performs the first stage of sand-falling on the first conveying track 4, and the sand mold is broken and separated from the workpiece to form a sand block;

[0046] The sand blocks fall between the two crushing rollers 11, and the crushing rollers 11 crush the sand blocks falling from the first conveying track 4 to form sand particles. The screen plate 12 is used to screen the sand particles. The sand particles that meet the sandblasting size enter the conveying surface of the sand particle conveyor belt 13 and are conveyed to the inside of the second box 15. The large particles of sand particles that have not been screened enter the first box 14.

[0047] Step 2: The workpiece enters the second conveying track 5 and continues to be conveyed. At this time, the second conveying track 5 and the first conveying track 4 are at the same horizontal plane, and the workpiece performs the second stage of vibration sanding on the second conveying track 5;

[0048] At this time, the first sand leakage hole 71 and the second sand leakage hole 81 are in a connected state, and the combined bottom plate is in an unsealed state, so that sand particles and sand blocks can pass through the combined bottom plate and fall down;

[0049] Step 3: After the second stage of vibration sand removal, if a large amount of sand or sand blocks remain on the workpiece, the handle 25 is turned to form a vertical downward movement of the second conveying track 5 through the threaded subassembly until the second conveying track 5 is located inside the uncovered box; at the same time, the second adjusting screw 83 is rotated to adjust the relative position of the movable bottom plate 8 and the fixed bottom plate 7, so that the first sand leakage hole 71 of the fixed bottom plate 7 is not connected with the second sand leakage hole 81 of the movable bottom plate 8, and the combined bottom plate is in a sealed state;

[0050] The discharge pipe 162 is opened, and the first return pipe 16 guides the large sand particles inside the first box body 14 into the uncovered box body, forming friction material inside the uncovered box body, and the workpieces on the second conveying track 5 are submerged in the friction material. Through the vibration of the vibrating sand-falling box 2, the workpieces and the friction material form contact friction, which is conducive to the separation of sand particles or sand blocks on the workpieces, and realizes the friction sand-falling of the workpieces;

[0051] Step 4: After the friction and sand removal of the workpiece on the second conveying track 5 is completed, the position of the second conveying track 5 is adjusted so that the second conveying track 5 and the first conveying track 4 are in the same horizontal plane, and the workpiece is conveyed on the second conveying track 5 by vibration and enters the third conveying track 6 from the workpiece guide plate 21;

[0052] At the same time, the second adjusting screw 83 is rotated to adjust the relative position of the movable bottom plate 8 and the fixed bottom plate 7, so that the first sand leakage hole 71 of the fixed bottom plate 7 is connected with the second sand leakage hole 81 of the movable bottom plate 8, and the combined bottom plate is in an unsealed state. Through vibration, the large sand particles inside the uncovered box can be discharged. The large sand particles become smaller due to the collision and crushing with the workpiece. At the same time, after being discharged, they can be crushed and screened again to obtain sand particles with smaller particle sizes, which is conducive to the reuse of sand particles.

[0053] Step 5: The workpiece on the third conveying track 6 enters the processing space between the isolation curtains 35, and the lower sandblasting seat 33 and the lower sandblasting tube 34 perform sandblasting on the workpiece on the third conveying track 6 to further clean the surface of the workpiece;

[0054] The sand particles after sandblasting can be discharged through the sand discharge pipe 18, and the unused sand materials in the first box 14 and the second box 15 can be discharged through the sand discharge pipe 18 for subsequent recycling of the sand materials.

[0055] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sand-falling machine for casting, comprising a fixed bottom box and a vibrating sand-falling box located above the fixed bottom box, wherein the vibrating sand-falling box is connected to the fixed bottom box through a first elastic support member, and a conveying track for placing workpieces is arranged on the vibrating sand-falling box, and when the vibrating sand-falling box vibrates, the workpieces are sand-falling and moved on the conveying track. It is characterized in that The conveying track comprises a first conveying track fixedly connected to the vibrating sand box and a second conveying track slidably connected to the vibrating sand box in a vertical direction, and a feeding end of the second conveying track is connected to a discharging end of the first conveying track; A combined bottom plate and an isolation guide plate are arranged inside the vibrating sand-falling box, the combined bottom plate is located below the second conveying track and is parallel to the conveying direction of the second conveying track, the isolation guide plate and the three side walls of the vibrating sand-falling box are respectively connected to the combined bottom plate and are vertically arranged, the combined bottom plate, the isolation guide plate and the three side walls of the vibrating sand-falling box form an uncovered box body, and the second conveying track is located inside the uncovered box body to realize contact sand-falling of the workpiece on the second conveying track; A sand cleaning box is arranged on the upper part of the fixed bottom box, a third conveying track is arranged inside the sand cleaning box, a feeding end of the third conveying track is connected with a discharging end of the second conveying track, and a sand blasting tube is arranged above and below the third conveying track in the sand cleaning box; A crushing roller for crushing sand blocks to form sand particles, a screen plate for screening sand particles and a sand conveyor belt for conveying sand particles are arranged in sequence from top to bottom below the vibrating sand falling box. A first box body is arranged at the discharge end of the screen plate, and a second box body is arranged at the discharge end of the sand conveyor belt. The first box body is connected to the uncovered box body through a first reflux pipe, and the second box body is connected to the sandblasting pipe of the sand cleaning box through a second reflux pipe.

2. The casting shakeout machine according to claim 1, It is characterized in that The combined bottom plate comprises a fixed bottom plate and a movable bottom plate which are arranged parallel and close to each other, the fixed bottom plate is located above the movable bottom plate, and the movable bottom plate is slidably connected with the fixed bottom plate in the horizontal direction; A first sand leakage hole is arranged on the fixed bottom plate, and a second sand leakage hole for matching with the first sand leakage hole is arranged on the movable bottom plate. The first sand leakage hole and the second sand leakage hole are connected to realize an unsealed state of the combined bottom plate, and the first sand leakage hole and the second sand leakage hole are not connected to realize a sealed state of the combined bottom plate.

3. The casting shakeout machine according to claim 2, It is characterized in that One side of the movable bottom plate is rotatably connected to a second adjusting screw, and a threaded seat matching the second adjusting screw is provided on the vibrating sand-falling box, and the second adjusting screw is threadedly connected to the threaded seat to realize horizontal position movement of the movable bottom plate.

4. The casting shakeout machine according to any one of claims 1 to 3, It is characterized in that The vibrating sand box is provided with an adjusting slider and a first adjusting screw threadedly connected to the adjusting slider, the first adjusting screw is vertically arranged, the adjusting slider is fixedly connected to the second conveying track, and the first adjusting screw forms the vertical movement of the second conveying track by rotating.

5. The casting shakeout machine according to claim 4, It is characterized in that An upper sandblasting seat and an upper sandblasting tube are arranged above the third conveying track, and a lower sandblasting seat and a lower sandblasting tube are arranged below the third conveying track. The upper sandblasting tube and the lower sandblasting tube are positioned correspondingly and are respectively located between the third conveying rollers of the third conveying track.

6. The casting shakeout machine according to claim 5, It is characterized in that A sand discharge pipe for discharging sand particles is arranged at the bottom of the sand cleaning box. The sand discharge pipe is connected with the first box body through a first material guide pipe and is connected with the second box body through a second material guide pipe.

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