A foundry sand recovery system

Abstract

The present invention relates to the field of molding sand recovery processing technology, and specifically discloses a casting molding sand recovery system, including a cylinder and two rolling rollers, wherein a material dividing mechanism is arranged in the cylinder, and the material dividing mechanism is arranged in two groups, and each group of material dividing mechanisms comprises a screening component and a separation component, and the screening component comprises a screen plate arranged in the cylinder, and the screen plate gradually tilts downward along the rotation direction of the rolling roller, and the separation component comprises two arc plates and a guide structure arranged in the cylinder, and a crushing channel is formed between the two arc plates; the present invention screens the molding sand through the screen plate, and separates the screened agglomerated molding sand and small-particle-size molding sand through the separation component, so that the rolling roller can carry out targeted crushing of the agglomerated molding sand, and avoid the agglomerated molding sand from sliding during crushing due to the fluidity of fine sand; in addition, the screen plate can send the agglomerated molding sand between the rolling roller and the side wall of the cylinder into the rotation path of the rolling roller, so as to ensure the crushing effect of the molding sand.

Description

Technical Field

[0001] The invention relates to the technical field of molding sand recovery and processing, and in particular to a foundry molding sand recovery system. Background Art

[0002] Molding sand is the most common auxiliary material in the casting process. Various styles of sand molds can be prepared from molding sand for casting. After casting is completed, the molding sand is fixed into shape after high temperature. In order to effectively utilize the molding sand, the molded molding sand needs to be crushed, pulverized, screened and other processes in turn before it can be reused. When the relevant technology recycles the molding sand, it needs to be crushed first and then put into the crusher for crushing and screening.

[0003] The patent document with announcement number CN116408420B discloses a grinding wheel type sand mixer, including a sand mixing drum, a central axis rotatably arranged on the sand mixing drum, two horizontal axes arranged on the central axis, and two grinding wheels respectively arranged on the two horizontal axes. A contact portion is provided at one end of the horizontal axis away from the central axis, and the contact portion contacts the inner wall of the sand mixing drum. The grinding wheels are axially slidably arranged on the horizontal axis. Two elastic devices are provided on each horizontal axis. Molding sand is put into the sand mixing drum. The rotating central axis drives the horizontal axis to rotate, and the horizontal axis drives the grinding wheels to revolve around the central axis. The grinding wheels can also rotate when rolling the molding sand. Through the relative movement of the grinding wheels and the bottom of the sand mixing drum, the material placed between the two can be crushed under the action of rolling and grinding, thereby achieving the purpose of crushing the material.

[0004] However, when the above-mentioned roller sand mixer is used to crush the molding sand, as the molding sand is gradually crushed, there will be a certain amount of crushed fine sand and metal particle impurities at the bottom of the sand mixer, so that when the incompletely crushed molding sand particles are crushed by the roller, the fluidity of the fine sand at the bottom will cause the uncrushed molding sand particles to move, thereby reducing the crushing efficiency. At the same time, there will be a certain dead angle between the roller and the side wall of the sand mixer. If the incompletely crushed molding sand particles enter the dead angle, they will not be crushed by the roller, thereby failing to ensure the crushing effect. Summary of the invention

[0005] The present invention provides a foundry sand recovery system, which aims to solve the problem that when a roller-type sand mixer in the related technology crushes the molding sand, as the molding sand is gradually crushed, a certain amount of crushed fine sand and metal particle impurities will exist at the bottom of the sand mixer, so that when the incompletely crushed molding sand particles are crushed by the roller, the fluidity of the fine sand at the bottom will cause the uncrushed molding sand particles to move, thereby reducing the crushing efficiency. At the same time, there will be a certain dead angle between the roller and the side wall of the sand mixer. If the uncrushed molding sand particles enter the dead angle, they will not be crushed by the roller, thereby failing to ensure the crushing effect.

[0006] A foundry sand recovery system of the present invention comprises a cylinder, two rolling rollers and a driving assembly, wherein the two rolling rollers are arranged in a rotation array along the axis of the cylinder, the driving assembly is used to drive the two rolling rollers to rotate around the axis of the cylinder, and a material distribution mechanism is arranged in the cylinder, the material distribution mechanism is provided in two groups and is correspondingly arranged at the front side of the rotation direction of the two rolling rollers, and each group of material distribution mechanisms comprises a screening assembly and a separation assembly;

[0007] The screening assembly comprises a screen plate arranged in the cylinder, the screen plate can rotate synchronously with the rolling roller around the axis of the cylinder, the screen plate gradually tilts downward along the rotation direction of the rolling roller, and the lower end of the screen plate contacts the bottom of the cylinder, wherein the screen plate in one group of material feeding mechanisms contacts the inner side wall of the cylinder;

[0008] The separation assembly includes two arc plates and a guide structure arranged in the cylinder, with the side of the sieve plate facing the corresponding rolling roller as the rear side of the sieve plate, the two arc plates are arranged on the rear side of the sieve plate and are fixedly connected to the sieve plate, a crushing channel is formed between the two arc plates, and the two rolling rollers are respectively rotatably arranged at one end of the corresponding crushing channel away from the sieve plate, and the guide structure is used to guide the material on the front side of the sieve plate into the crushing channel, and at the same time guide the material on the rear side of the sieve plate to both sides of the crushing channel.

[0009] The molding sand in the cylinder can be screened through the screen plate, and the screened agglomerated molding sand and small-size molding sand can be separated through the separation component, so that the rolling roller can specifically crush the agglomerated molding sand to avoid the agglomerated molding sand from sliding during crushing due to the fluidity of fine sand, and at the same time, it can avoid excessive crushing of fine sand.

[0010] Preferably, the driving assembly includes a central shaft arranged along the axis of the cylinder, a reduction motor for driving the central shaft to rotate, and a mounting plate arranged at the upper end of the central shaft, and the two rolling rollers are rotatably arranged at both ends of the mounting plate.

[0011] Preferably, two partition plates are connected to the lower end of the mounting plate, and the two partition plates are respectively arranged at both ends of the mounting plate, and the two sieve plates are respectively arranged corresponding to the two partition plates, one of the sieve plates is arranged on the side of the corresponding partition plate away from the central axis, and the side of the sieve plate away from the partition plate contacts the inner side wall of the cylinder, and the other sieve plate is arranged on the side of the corresponding partition plate close to the central axis, and the side of the sieve plate close to the central axis contacts the side wall of the central axis.

[0012] Through the staggered arrangement of the two screen plates, the screen plates can screen all the molding sand in the cylinder, and allow the screened agglomerated materials to enter the crushing channel for targeted crushing.

[0013] Preferably, a dividing plate is connected between the upper end of the sieve plate and the two arc plates, and the dividing plate is horizontally arranged. The guide structure includes two guide plates 1 arranged at the upper end of the dividing plate, and guide plate 2 arranged at the lower end of the dividing plate. The two guide plates 1 are close to each other toward one end of the crushing channel and are respectively connected to the two arc plates, so as to guide the agglomerated materials trapped on the front side of the sieve plate into the crushing channel. The guide plate 2 is V-shaped, and the tip of the guide plate 2 faces the sieve plate. The two side edges are respectively connected to the two arc plates, so as to guide the small-size materials after screening to the two sides of the crushing channel.

[0014] Preferably, a pushing assembly is also provided in the cylinder, and the pushing assembly includes a rotating shaft rotatably arranged between two arc-shaped plates, a pushing plate slidably installed on the outside of the rotating shaft along the axial direction of the rotating shaft, and a driving structure for driving the rotating shaft to rotate around its own axis. The downward end of the pushing plate extends into the crushing channel, and a spring is provided between the pushing plate and one of the arc-shaped plates, and the spring set is provided on the outside of the rotating shaft.

[0015] The pushing plate can be turned over to continuously push the molding sand in the crushing channel to the bottom of the rolling roller, and at the same time, the molding sand under the rolling roller can be blocked to prevent the agglomerated molding sand from slipping due to the fluidity of the fine sand, thereby ensuring the crushing effect of the agglomerated molding sand.

[0016] Preferably, the driving structure includes an eccentric shaft arranged on one side of the rolling roller, and a connecting rod arranged between the eccentric shaft and the rotating shaft, one end of the connecting rod is fixedly connected to the rotating shaft, and the other end of the connecting rod is provided with a slot hole, and the eccentric shaft is movably connected to the connecting rod through the slot hole.

[0017] Preferably, a scraping portion is provided at the upward end of the push plate, and when the rotating shaft rotates and causes the push plate to flip upward, the scraping portion can contact the side wall of the rolling roller.

[0018] When the push plate is turned upward, the scraping part can scrape the side wall of the rolling roller to remove the molding sand particles adhering to the rolling roller.

[0019] Preferably, a vibration component for vibrating the sieve plate is also provided in the cylinder, the vibration component includes a push rod longitudinally slidably arranged in the partition plate, a knocking block arranged at the upper end of the push rod, and a contact block arranged at the bottom of the cylinder, the partition plate is provided with a slide groove on the side facing the corresponding sieve plate, the knocking block is slidably arranged in the slide groove, and a spring 2 is connected between the lower end of the knocking block and the partition plate, the lower end of the knocking block can contact the upper inclined surface of the sieve plate, the contact blocks are provided in plurality and are arranged at intervals along the circumference of the cylinder, each contact block is provided with an inclined surface, and the inclined surface gradually inclines upward along the rotation direction of the rolling roller, and during the rotation of the central axis, the lower end of the push rod can contact with multiple contact blocks in sequence.

[0020] During the rotation of the central axis, the knocking block can be moved up and down through the cooperation of the push rod and the contact block to knock the screen plate to avoid blockage of the screen plate and affect the screening effect of the molding sand.

[0021] Preferably, a support plate is provided at the lower end of the cylinder, a plurality of rods are provided at the upper end of the support plate, the plurality of rods respectively penetrate the bottom of the cylinder and are correspondingly connected to a plurality of contact blocks, and a spring three is connected between the upper end of the support plate and the cylinder.

[0022] Preferably, a discharge port is provided at the lower end of the cylinder, and a magnetic separation conveyor belt is provided below the discharge port.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention is provided with a material dividing mechanism, which can screen the molding sand in the cylinder through the screen plate during the rotation of the rolling roller around the axis of the central axis, and separate the screened agglomerated molding sand and small-particle molding sand through the separation component, so that the rolling roller can specifically crush the agglomerated molding sand to avoid the agglomerated molding sand sliding during crushing due to the fluidity of fine sand. In addition, the screen plate can send the agglomerated molding sand between the rolling roller and the side wall of the cylinder into the rotating path of the rolling roller to avoid the phenomenon that part of the molding sand is not crushed, so as to ensure the crushing effect of the molding sand.

[0025] 2. The present invention is provided with a pushing assembly, which can drive the pushing plate to flip through the driving structure, so as to continuously push the molding sand in the crushing channel to the bottom of the rolling roller, and at the same time can block the molding sand under the rolling roller to prevent the agglomerated molding sand from slipping due to the fluidity of the fine sand, thereby ensuring the crushing effect.

[0026] 3. The present invention is provided with a scraping part, so that when the push plate is turned over, the side wall of the rolling roller can be scraped by the scraping part to remove the molding sand particles adhering to the rolling roller, so as to ensure the crushing effect of the rolling roller on the molding sand.

[0027] 4. The present invention is provided with a vibration assembly. During the rotation of the central axis, the knocking block can be moved up and down by the cooperation of the push rod and the contact block to knock the screen plate, thereby avoiding the blockage of the screen plate and affecting the screening effect of the molding sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the assembly structure of the cylinder and the material distribution mechanism of the present invention.

[0030] Figure 3 It is a structural schematic diagram of the material distribution mechanism of the present invention.

[0031] Figure 4 It is a schematic diagram of the assembly structure of the cylinder, the screen plate and the arc plate of the present invention.

[0032] Figure 5 It is a structural schematic diagram of the pusher assembly of the present invention.

[0033] Figure 6 It is a schematic structural diagram of the vibration component of the present invention.

[0034] Figure 7 The present invention Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0035] Figure 8 It is a schematic structural diagram of the contact plate and the rod member of the present invention.

[0036] Reference numerals:

[0037] 1. Cylinder; 100. Discharge port; 11. Roller; 111. Eccentric shaft; 12. Center shaft; 13. Speed ​​reducer; 14. Mounting plate; 15. Partition plate; 151. Slide; 16. Magnetic separation conveyor belt; 21. Screen plate; 22. Arc plate; 23. Dividing plate; 24. Guide plate 1; 25. Guide plate 2; 31. Rotating shaft; 32. Push plate; 321. Scraping part; 33. Spring 1; 34. Connecting rod; 341. Slot; 41. Push rod; 42. Knocking block; 43. Contact block; 44. Spring 2; 45. Support plate; 46. Rod; 47. Spring 3. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figures 1 to 8 As shown, a foundry sand recovery system of the present invention includes a cylinder 1, two rolling rollers 11 and a driving assembly. A discharge port 100 is provided at the lower end of the cylinder 1. The two rolling rollers 11 are arranged in a rotating array along the axis of the cylinder 1. The driving assembly is used to drive the two rolling rollers 11 to rotate around the axis of the cylinder 1. The driving assembly includes a central axis 12 arranged along the axis of the cylinder 1, a reduction motor 13 for driving the central axis 12 to rotate, and a mounting plate 14 arranged at the upper end of the central axis 12. The two rolling rollers 11 are respectively rotatably arranged at both ends of the mounting plate 14. A material dividing mechanism is provided in the cylinder 1. The material dividing mechanism is provided in two groups and is correspondingly arranged on the front side of the rotation direction of the two rolling rollers 11. Each group of material dividing mechanisms includes a screening assembly and a separation assembly.

[0040] Specifically, molding sand is added into the cylinder 1, and then the reduction motor 13 is started to drive the central shaft 12 to rotate. The rotation of the central shaft 12 drives the mounting plate 14 to rotate, so that the rolling rollers 11 arranged at both ends of the mounting plate 14 revolve around the axis of the central shaft 12. At the same time, the rolling rollers 11 also rotate around their own axes, so that the molding sand entering between the rolling rollers 11 and the cylinder 1 can be crushed through the relative movement of the rolling rollers 11 and the cylinder 1, thereby achieving the crushing of the molding sand.

[0041] The screening component includes a sieve plate 21 arranged in the cylinder 1, and the sieve plate 21 can rotate synchronously with the rolling roller 11 around the axis of the cylinder 1. The sieve plate 21 gradually tilts downward along the rotation direction of the rolling roller 11, and the lower end of the sieve plate 21 contacts the bottom of the cylinder 1, and the sieve plate 21 in one group of material feeding mechanisms contacts the inner wall of the cylinder 1. The separation component includes two arc plates 22 and a guide structure arranged in the cylinder 1, with the side of the sieve plate 21 facing the corresponding rolling roller 11 as the rear side of the sieve plate 21. The two arc plates 22 are both arranged on the rear side of the sieve plate 21 and fixedly connected to the sieve plate 21. A crushing channel is formed between the two arc plates 22, and the two rolling rollers 11 are respectively rotated and arranged at one end of the corresponding crushing channel away from the sieve plate 21. The guide structure is used to guide the material on the front side of the sieve plate 21 into the crushing channel, and at the same time guide the material on the rear side of the sieve plate 21 to both sides of the crushing channel.

[0042] Specifically, the rotation of the central shaft 12 will drive the two rolling rollers 11 to rotate around the axis of the central shaft 12, and at the same time drive the screen plate 21 to rotate synchronously with the rolling rollers 11. During the rotation of the screen plate 21, the molding sand in the cylinder 1 will contact the upper inclined surface of the screen plate 21 and be sieved through the sieve holes on the screen plate 21. At this time, the agglomerated molding sand will be retained on the front side of the screen plate 21, and the small-sized molding sand will enter the rear side of the screen plate 21 through the sieve holes on the screen plate 21, and the agglomerated molding sand on the front side of the screen plate 21 will be guided into the crushing channel through the guide structure, so as to be crushed by the rolling rollers 11 in the crushing channel, and at the same time, the small-sized molding sand on the rear side of the screen plate 21 will be guided to both sides of the crushing channel to avoid the small-sized molding sand affecting the crushing of the agglomerated molding sand, and the molding sand in the cylinder 1 will be screened by the screening component and passed through The separation component separates the sieved agglomerated molding sand from the small-particle-size molding sand, so that the rolling roller 11 can crush the agglomerated molding sand in a targeted manner, thereby avoiding the agglomerated molding sand from sliding during crushing due to the fluidity of the fine sand, so as to ensure the crushing effect and efficiency of the agglomerated molding sand, and at the same time avoid excessive crushing of the small-particle-size molding sand, thereby further ensuring the crushing effect. In addition, since the screen plate 21 in one group of the material mechanism contacts the inner wall of the cylinder 1, the screen plate 21 rotates around the axis of the central axis 12, so that the molding sand entering the area between the rolling roller 11 and the side wall of the cylinder 1 can be screened, and the sieved agglomerated molding sand can be guided into the crushing channel for crushing, thereby avoiding some agglomerated molding sand from entering this area and being unable to be crushed by the rolling roller 11, thereby further ensuring the crushing effect of the molding sand.

[0043] In some embodiments, two partition plates 15 are connected to the lower end of the mounting plate 14, and the two partition plates 15 are respectively arranged at both ends of the mounting plate 14. Two sieve plates 21 are respectively arranged corresponding to the two partition plates 15, one of the sieve plates 21 is arranged on the side of the corresponding partition plate 15 away from the central axis 12, and the side of the sieve plate 21 away from the partition plate 15 contacts the inner side wall of the cylinder 1, and the other sieve plate 21 is arranged on the side of the corresponding partition plate 15 close to the central axis 12, and the side of the sieve plate 21 close to the central axis 12 contacts the side wall of the central axis 12.

[0044] Specifically, Figures 2 to 6As shown, through the staggered arrangement of the two sieve plates 21, when the sieve plates 21 rotate around the axis of the central axis 12, the sieve plate 21 close to the side wall of the cylinder 1 can screen the molding sand accumulated between the rolling roller 11 and the side wall of the cylinder 1, and at the same time, the sieve plate 21 close to the central axis 12 can screen the molding sand at the center of the cylinder 1, so that all the molding sand in the cylinder 1 can be screened, and the screened agglomerated molding sand can be guided to the corresponding crushing channel for targeted crushing, thereby avoiding that a part of the agglomerated molding sand does not enter the rotation path of the rolling roller 11 and cannot be crushed by the rolling roller 11.

[0045] In some embodiments, a dividing plate 23 is connected between the upper end of the sieve plate 21 and the two curved plates 22, and the dividing plate 23 is horizontally arranged. The guide structure includes two guide plates 1 24 arranged at the upper end of the dividing plate 23, and a guide plate 2 25 arranged at the lower end of the dividing plate 23. The two guide plates 1 24 are close to each other toward one end of the crushing channel and are respectively connected to the two curved plates 22, and are used to guide the agglomerated materials trapped on the front side of the sieve plate 21 into the crushing channel. The guide plate 2 25 is V-shaped, and the tip of the guide plate 25 faces the sieve plate 21. The two sides are respectively connected to the two curved plates 22, and are used to guide the small-size materials after screening to both sides of the crushing channel.

[0046] Specifically, Figures 3 to 6 As shown, during the process of the sieve plate 21 rotating around the axis of the central axis 12, the molding sand in the cylinder 1 will contact the upper inclined surface of the sieve plate 21, and be screened through the sieve holes on the sieve plate 21, so that the agglomerated molding sand will be retained on the front side of the sieve plate 21, and the small-size molding sand will enter the back side of the sieve plate 21. At this time, as the sieve plate 21 continues to rotate, the agglomerated molding sand retained on the front side of the sieve plate 21 will be pushed by the remaining molding sand in the cylinder 1, so that the agglomerated molding sand gradually moves upward along the inclined sieve plate 21, and after moving to the upper end of the dividing plate 23, it gradually enters the crushing channel along two mutually adjacent guide plates 1 24 for crushing, and the small-size molding sand that enters the back side of the sieve plate 21 will move to both sides of the crushing channel along the two side edges of the guide plate 25 under the action of the tip of the guide plate 25.

[0047] As the agglomerated molding sand in the crushing channel is gradually crushed, new fine sand will be formed in the crushing channel, and will affect the crushing of the agglomerated molding sand that subsequently enters the crushing channel. Therefore, in some embodiments, a pushing assembly is also provided in the cylinder 1, and the pushing assembly includes a rotating shaft 31 rotatably arranged between the two arc-shaped plates 22, a pushing plate 32 slidably installed on the outside of the rotating shaft 31 along the axial direction of the rotating shaft 31, and a driving structure for driving the rotating shaft 31 to rotate around its own axis. The downward end of the pushing plate 32 extends into the crushing channel, and a spring 33 is provided between the push plate 32 and the arc-shaped plate 22 close to the side wall of the cylinder 1, and the spring 33 is sleeved on the outside of the rotating shaft 31.

[0048] Specifically, Figures 3 to 6 As shown, in the initial state, the push plate 32 is in an inclined state, so that there is a certain gap between the lower end of the push plate 32 and the bottom of the cylinder 1, so that the molding sand entering the crushing channel can move to the rolling roller 11 through the gap at the lower end of the push plate 32 for crushing. In this process, the driving structure drives the rotating shaft 31 to rotate around its own axis, and drives the push plate 32 that slides with the rotating shaft 31 to rotate synchronously, so that the push plate 32 is turned downward in the direction close to the rolling roller 11, and the molding sand in the crushing channel is pushed toward the rolling roller 11. At the same time, the push plate 32 can block the agglomerated molding sand at the rolling roller 11 to prevent the rolling The agglomerated molding sand under the pressure roller 11 slips due to the fluidity of the fine sand. The molding sand entering the crushing channel can be continuously pushed toward the bottom of the rolling roller 11 through the reciprocating flipping of the push plate 32 to ensure the crushing effect of the molding sand. In addition, in the process of the push plate 32 flipping upward, when the push plate 32 contacts the arc plate 22, the push plate 32 will move along the axial direction of the rotating shaft 31, and the spring 33 will be stretched to accumulate force to prevent the arc plate 22 from blocking the flipping of the push plate 32. When the push plate 32 flips downward, the push plate 32 will move along the axial direction of the rotating shaft 31 to reset under the action of the spring 33.

[0049] In some embodiments, the driving structure includes an eccentric shaft 111 disposed on one side of the rolling roller 11, and a connecting rod 34 disposed between the eccentric shaft 111 and the rotating shaft 31, one end of the connecting rod 34 is fixedly connected to the rotating shaft 31, and the other end of the connecting rod 34 is provided with a slot 341, and the eccentric shaft 111 is movably connected to the connecting rod 34 through the slot 341. Specifically, Figure 3 and Figure 5 As shown, in the process of the rolling roller 11 rotating around its own axis, the eccentric shaft 111 arranged on the rolling roller 11 will be driven to rotate synchronously, so that the height of the eccentric shaft 111 is constantly changing, and the height of the end of the connecting rod 34 that is movably connected to the eccentric shaft 111 is constantly changing. Since the other end of the connecting rod 34 is connected to the rotating shaft 31, and the height remains unchanged, the connecting rod 34 will repeatedly repeat the process of changing from an inclined state to a horizontal state, and then from a horizontal state to an inclined state during the rotation of the rolling roller 11. When the connecting rod 34 is in a tilted state, the push plate 32 is in a tilted state. At this time, the molding sand entering the crushing channel can gradually approach the rolling roller 11 through the gap at the lower end of the push plate 32. In the process of the connecting rod 34 changing from an inclined state to a horizontal state, the push plate 32 will flip in the direction close to the rolling roller 11, and push the molding sand to the bottom of the rolling roller 11.

[0050] As the rolling roller 11 is used, a certain amount of molding sand will adhere to the outer side of the rolling roller 11, which will have a certain impact on the rolling roller 11. Therefore, in some embodiments, a scraping portion 321 is provided at the upward end of the push plate 32. When the rotating shaft 31 rotates and causes the push plate 32 to flip upward, the scraping portion 321 can contact the side wall of the rolling roller 11. Specifically, Figure 3 and Figure 6 As shown, as the rotating shaft 31 rotates, the push plate 32 flips upward and becomes inclined, and the scraper portion 321 provided at the upper end of the push plate 32 can contact the side wall of the rolling roller 11 to scrape the outer side of the rolling roller 11, thereby removing the molding sand particles adhering to the outer side of the rolling roller 11 to ensure the normal use of the rolling roller 11.

[0051] As the sieve plate 21 is used, some molding sand particles may clog the sieve holes of the sieve plate 21, affecting the screening of the molding sand. Therefore, in some embodiments, a vibration assembly for vibrating the sieve plate 21 is further provided in the cylinder 1, and the vibration assembly includes a push rod 41 longitudinally slidably arranged in the partition plate 15, a knocking block 42 arranged at the upper end of the push rod 41, and a contact block 43 arranged at the bottom of the cylinder 1. A sliding groove 151 is provided on one side of the partition plate 15 facing the corresponding sieve plate 21, and the knocking block 42 is provided on the bottom of the cylinder 1. 2 is slidably arranged in the slide groove 151, and a spring 44 is connected between the lower end of the knocking block 42 and the partition plate 15, and the lower end of the knocking block 42 can contact with the upper inclined surface of the sieve plate 21. The contact blocks 43 are provided in plurality and are arranged at intervals along the circumference of the cylinder 1. Each contact block 43 is provided with an inclined surface, and the inclined surface gradually inclines upward along the rotation direction of the rolling roller 11. During the rotation of the central shaft 12, the lower end of the push rod 41 can sequentially contact with the plurality of contact blocks 43 in the cylinder 1.

[0052] Specifically, Figures 3 to 7 As shown, when the central shaft 12 rotates, it will drive the mounting plate 14 and the partition plate 15 to rotate synchronously, and at the same time drive the push rod 41 arranged in the partition plate 15 to rotate around the axis of the central shaft 12. When the lower end of the push rod 41 contacts the contact block 43, the push rod 41 will move upward along the inclined surface on the contact block 43, and drive the knocking block 42 arranged at the upper end of the push rod 41 to move upward, so that the spring 2 44 is stretched to store force. When the push rod 41 passes over the contact block 43, the push rod 41 will move downward quickly under the action of the spring 2 44, and drive the knocking block 42 to move downward to knock the screen plate 21, so as to shake off the molding sand particles blocked on the screen plate 21, thereby ensuring the screening effect of the screen plate 21 on the molding sand.

[0053] In some embodiments, a support plate 45 is provided at the lower end of the cylinder 1, and a plurality of rods 46 are provided at the upper end of the support plate 45. The plurality of rods 46 respectively penetrate the bottom of the cylinder 1 and are correspondingly connected to the plurality of contact blocks 43. A spring 47 is connected between the upper end of the support plate 45 and the cylinder 1.

[0054] Specifically, Figures 4 to 8 As shown, during the process of the sieve plate 21 rotating around the axis of the central axis 12, the sieve plate 21 will also contact multiple contact blocks 43. At this time, the contact blocks 43 will be pressed by the sieve plate 21 and move downward to prevent the contact blocks 43 from blocking the rotation of the sieve plate 21. During the downward movement of the contact block 43, the rod 46 connected to the contact block 43 will be driven to move downward, and the support plate 45 will be driven to move downward, so that the spring three 47 is stretched to store force. When the sieve plate 21 passes over the contact block 43, the contact block 43 will move upward under the action of the spring three 47 to reset.

[0055] like Figure 1 As shown, a magnetic separation conveyor belt 16 is provided below the discharge port 100. The crushed molding sand particles will be discharged from the discharge port 100 and fall onto the magnetic separation conveyor belt 16 for transportation. During this process, the metal particle impurities mixed in the molding sand particles can be adsorbed, thereby achieving effective separation of the metal particle impurities from the molding sand particles and improving the purity of the molding sand particles.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A foundry sand recovery system, comprising a cylinder, two rolling rollers and a drive assembly, wherein the two rolling rollers are arranged in a rotation array along the axis of the cylinder, and the drive assembly is used to drive the two rolling rollers to rotate around the axis of the cylinder, characterized in that: A material distribution mechanism is provided in the cylinder, and the material distribution mechanism is provided in two groups, and is correspondingly arranged at the front side of the two rolling rollers in the rotation direction, and each group of material distribution mechanisms includes a screening component and a separation component; The screening assembly comprises a screen plate arranged in the cylinder, the screen plate can rotate synchronously with the rolling roller around the axis of the cylinder, the screen plate gradually tilts downward along the rotation direction of the rolling roller, and the lower end of the screen plate contacts the bottom of the cylinder, wherein the screen plate in one group of material feeding mechanisms contacts the inner side wall of the cylinder; The separation assembly includes two arc-shaped plates and a guide structure arranged in the cylinder, with the side of the screen plate facing the corresponding rolling roller as the rear side of the screen plate, the two arc-shaped plates are arranged at the rear side of the screen plate and are fixedly connected to the screen plate, a crushing channel is formed between the two arc-shaped plates, and the two rolling rollers are respectively rotatably arranged at one end of the corresponding crushing channel away from the screen plate, and the guide structure is used to guide the material on the front side of the screen plate into the crushing channel, and at the same time guide the material on the rear side of the screen plate to both sides of the crushing channel; A dividing plate is connected between the upper end of the sieve plate and the two arc plates, and the dividing plate is horizontally arranged. The guide structure includes two guide plates 1 arranged at the upper end of the dividing plate, and guide plate 2 arranged at the lower end of the dividing plate. The two guide plates 1 are close to each other toward one end of the crushing channel and are respectively connected to the two arc plates for guiding the agglomerated materials trapped on the front side of the sieve plate into the crushing channel. The guide plate 2 is V-shaped, and the tip of the guide plate 2 faces the sieve plate. The two side edges are respectively connected to the two arc plates for guiding the small-size materials after screening to the two sides of the crushing channel.

2. A foundry sand recovery system according to claim 1, characterized in that: The driving assembly comprises a central shaft arranged along the axis of the cylinder, a reduction motor for driving the central shaft to rotate, and a mounting plate arranged at the upper end of the central shaft, and the two rolling rollers are respectively rotatably arranged at both ends of the mounting plate.

3. A foundry sand recovery system according to claim 2, characterized in that: The lower end of the mounting plate is connected to two partition plates, which are respectively arranged at both ends of the mounting plate, and the two sieve plates are respectively arranged corresponding to the two partition plates, one of the sieve plates is arranged on the side of the corresponding partition plate away from the central axis, and the side of the sieve plate away from the partition plate contacts the inner side wall of the cylinder, and the other sieve plate is arranged on the side of the corresponding partition plate close to the central axis, and the side of the sieve plate close to the central axis contacts the side wall of the central axis.

4. A foundry sand recovery system according to claim 1, characterized in that: A pushing assembly is also provided in the cylinder, and the pushing assembly includes a rotating shaft rotatably arranged between two arc-shaped plates, a pushing plate slidably installed on the outside of the rotating shaft along the axial direction of the rotating shaft, and a driving structure for driving the rotating shaft to rotate around its own axis. The downward end of the pushing plate extends into the crushing channel, and a spring is provided between the pushing plate and one of the arc-shaped plates. The spring set is arranged on the outside of the rotating shaft.

5. A foundry sand recovery system according to claim 4, characterized in that: The driving structure includes an eccentric shaft arranged on one side of the rolling roller, and a connecting rod arranged between the eccentric shaft and the rotating shaft, one end of the connecting rod is fixedly connected to the rotating shaft, and the other end of the connecting rod is provided with a slot hole, and the eccentric shaft is movably connected to the connecting rod through the slot hole.

6. A foundry sand recovery system according to claim 5, characterized in that: A scraping portion is provided at one end of the push plate facing upwards. When the rotating shaft rotates and causes the push plate to flip upwards, the scraping portion can contact the side wall of the rolling roller.

7. A foundry sand recovery system according to claim 3, characterized in that: The cylinder is also provided with a vibration component for vibrating the screen plate, the vibration component includes a push rod longitudinally slidably arranged in the partition plate, a knocking block arranged at the upper end of the push rod, and a contact block arranged at the bottom of the cylinder. The partition plate is provided with a slide groove on the side facing the corresponding screen plate, the knocking block is slidably arranged in the slide groove, and a spring 2 is connected between the lower end of the knocking block and the partition plate, the lower end of the knocking block can contact the upper inclined surface of the screen plate, the contact blocks are provided in plurality and are arranged at intervals along the circumference of the cylinder, each contact block is provided with an inclined surface, and the inclined surface gradually inclines upward along the rotation direction of the rolling roller, and during the rotation of the central axis, the lower end of the push rod can contact with multiple contact blocks in sequence.

8. A foundry sand recovery system according to claim 7, characterized in that: A support plate is provided at the lower end of the cylinder, and a plurality of rods are provided at the upper end of the support plate. The plurality of rods respectively penetrate the bottom of the cylinder and are correspondingly connected to a plurality of contact blocks. A spring three is connected between the upper end of the support plate and the cylinder.

9. A foundry sand recovery system according to claim 1, characterized in that: A discharge port is arranged at the lower end of the cylinder, and a magnetic separation conveyor belt is arranged below the discharge port.

Images