Sand turning device for fine sand mold manufacturing for casting

Abstract

The application discloses a sand turning equipment for fine sand mold manufacturing for casting, and relates to the technical field of metal casting molds. The equipment comprises a support and a cover plate, the bottom of the cover plate is fixedly connected with a mixing barrel, a screening assembly is arranged below the cover plate, and a kneading assembly is arranged outside the mixing barrel. The screening assembly and the kneading assembly in the equipment cooperate with each other, the agglomerated fine sand falling on the buffer cone is subjected to transverse force by rotating extrusion teeth, so that the agglomerated fine sand is subjected to kneading and tearing, the agglomerated fine sand is dispersed, the dispersed fine sand is re-entered into the mixing barrel for mixing, a continuous kneading, tearing and mixing process is realized, the problem that dispersion is realized only by mutual friction between fine sands in the prior art, agglomeration is difficult to disperse, or the problem that after mixing is completed, the agglomerated fine sand is screened out and then is crushed, the time for mixing each batch of fine sand is relatively long is solved, and thus the dynamic and continuous treatment of the agglomerated fine sand is realized.

Description

Technical Field

[0001] This invention relates to the field of metal casting mold technology, and more specifically, to a sand-turning device for manufacturing fine sand molds for casting. Background Technology

[0002] Sand mixing equipment for manufacturing fine sand molds for casting is a type of sand mixing equipment. It is a special mechanical device used in casting production to mix raw sand with binder to produce qualified "molding sand". The mixed molding sand is used to manufacture sand molds for castings.

[0003] Traditional sand turning equipment usually uses a separate screening process, which cannot screen simultaneously during the mixing process. It can only remove all the materials after the fine sand and binder are mixed and then screened and crushed. This method not only requires a separate screening equipment, but also makes the process lengthy, complicated and reduces the continuity of work.

[0004] In addition, the nozzles used for spraying adhesives in the prior art are usually installed in a fixed position. This fixed structure cannot be adapted to adhesives with different viscosities, which will cause the high viscosity adhesive to be unevenly distributed during the mixing process with fine sand, thus forming lumps.

[0005] To solve the above problems, the inventors proposed a sand-turning device for manufacturing fine sand molds for casting. Summary of the Invention

[0006] To solve the above-mentioned technical problems, a sand-turning device for manufacturing fine sand molds for casting is provided. This technical solution solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention can be implemented using the following technical solutions:

[0008] The present invention provides a sand-turning device for manufacturing fine sand molds for casting, comprising a support and a cover plate, characterized in that a mixing tank is provided below the cover plate;

[0009] The mixing tank is equipped with a screening component;

[0010] The screening assembly includes a cylinder, a conveying pipe, an auger rod one, a long shell, an auger rod two, and a base. The outer side of the cylinder is connected to the conveying pipe, which is connected to the outer side of the mixing tank. The cylinder has multiple screen holes. The auger rod one is rotatably connected inside the cylinder. The long shell is set inside the mixing tank. The auger rod two is rotatably connected inside the long shell. The outer wall of the long shell has two rectangular openings. The base is set below the mixing tank. The base is set with components that drive the auger rod one and the auger rod two.

[0011] A collector is fixedly connected to the base, and a kneading assembly is provided outside the mixing tank. The kneading assembly includes a buffer cone fixedly connected to the outside of the mixing tank. An annular plate is rotatably connected inside the collector, and multiple extrusion teeth are fixedly connected at equal intervals in the annular plate.

[0012] Preferably, a drive motor is installed inside the base, and two synchronous pulleys and a double wheel are rotatably connected inside the base. A connecting rod is fixedly connected to the bottom of the auger rod one. The auger rod one is fixedly connected to the output shaft of the drive motor and the double wheel through the connecting rod. Both synchronous pulleys are fixedly connected to adjacent auger rods two. The double wheel is driven by the two synchronous pulleys through a synchronous belt. An agitator is provided on the auger rod one. The auger rod one and the two auger rods two are each composed of two sections of spiral blades in opposite directions. Two rectangular openings are opened on the outer wall of each elongated shell.

[0013] Preferably, the collector has two symmetrically arranged collection ports, both of which are cone-shaped. The buffer cone has multiple protrusions arranged in a ring. The annular plate is rotatably connected to the cover plate. The extrusion teeth are arranged in multiple rows and their length varies along the axial direction of the annular plate.

[0014] Preferably, the support is provided with a spraying assembly, which includes a storage box fixedly connected to the support, the storage box containing adhesive, and four connecting hoses connected to the storage box. Multiple fixed seats are fixedly connected in a ring at equal intervals inside the mixing tank. A movable block is slidably connected within each fixed seat. Multiple adjustment holes are formed on the outer wall of each movable block. A spray head is fixedly connected to the bottom of each adjustment hole. A T-shaped groove is formed on each fixed seat. An insert block is slidably connected within each T-shaped groove. A spring is fixedly connected between each insert block and the adjacent T-shaped groove.

[0015] Preferably, the storage tank is equipped with a pressure pump and a timer, and each of the connecting hoses is connected to the nearest spray head.

[0016] Preferably, each of the inserts is fixedly connected to a lever, and each insert is adapted to an adjustment hole.

[0017] Preferably, the kneading assembly further includes a protective shell fixedly connected to the bracket, a servo motor is mounted on the protective shell, and a pinion and a gear ring are rotatably connected inside the protective shell.

[0018] Preferably, the output shaft of the servo motor is fixedly connected to a pinion, the pinion is meshed with a gear ring, and the gear ring is fixedly connected to an annular plate.

[0019] As described above, the advantages of this invention are:

[0020] The screening and kneading components in this device work together, applying lateral force to the agglomerated fine sand falling onto the buffer cone through rotating extrusion teeth. This kneads and tears the agglomerated fine sand, causing it to disintegrate. The disintegrated fine sand is then reintroduced into the mixing tank for further mixing, achieving a continuous kneading, tearing, and remixing process. This solves the problems of existing mixing devices that rely solely on the mutual friction between fine sand particles for dispersion, resulting in difficulty in dispersing agglomerated particles, or the problems of sieving out agglomerated fine sand after mixing and then crushing it separately, leading to long mixing times for each batch of fine sand. In this way, the device achieves dynamic and continuous processing of agglomerated fine sand, thereby improving the mixing continuity of fine sand in the intelligent casting island system.

[0021] The screening component in this device, through the rotation of forward and reverse spiral blades on an auger rod and the presence of screen holes, lifts and screens the fine sand during the mixing process. This effectively separates unevenly mixed, lumpy fine sand, thus integrating the screening function into the mixing process. This solves the problem in existing technologies where all the mixed fine sand needs to be removed and lumpy sand screened after the mixing process is completed, resulting in a cumbersome procedure. In this way, this device achieves dynamic screening of lumpy fine sand during the mixing process, thereby improving the mixing efficiency of fine sand in the intelligent foundry island system.

[0022] The spraying component in this device utilizes a ring-shaped, equidistantly distributed servo motor for intermittent spraying and radial movement. For high-viscosity binders, the spray head is moved to the low-speed stirring zone near the inner wall of the mixing tank to achieve gentle premixing and prevent clumping. For low-viscosity binders, the spray head is moved to the high-speed stirring zone near the center of the mixing tank to ensure rapid and uniform dispersion of the binder. This adapts to different types of binders and solves the problem of fixed binder coverage in existing technologies using fixed ring nozzles. As a result, the spraying position can be adjusted when spraying different types of binders, thus improving the equipment flexibility when mixing fine sand with different binders in the intelligent casting island system. Attached Figure Description

[0023] Figure 1 This is a front perspective view of the overall structure of the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional view of the interior of the mixing tank shown in this invention;

[0025] Figure 3 This is a three-dimensional schematic diagram of the cylinder and conveying pipe components shown in this invention;

[0026] Figure 4 This is a three-dimensional schematic diagram of the auger rod and the spiral blades on the long shell shown in the present invention.

[0027] Figure 5 This is a three-dimensional schematic diagram of the conveying pipe and buffer cone components shown in the present invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the annular plate and extrusion teeth related components shown in this invention;

[0029] Figure 7 This is a three-dimensional schematic diagram of the separator cone inside the collector shown in this invention;

[0030] Figure 8 This is a three-dimensional schematic diagram of the collector and related components of the elongated shell shown in this invention;

[0031] Figure 9 This is a three-dimensional schematic diagram of the storage box and connecting hose components shown in this invention;

[0032] Figure 10 This is a three-dimensional cross-sectional view of the internal structure of the fixing base shown in this invention;

[0033] Figure 11 This is an exploded three-dimensional schematic diagram of the adjustment hole and insert block shown in the present invention;

[0034] Figure 12 This is a three-dimensional schematic diagram of the pinion and gear ring components shown in this invention.

[0035] The reference numerals in the appendix of this invention are as follows:

[0036] 1. Support frame; 2. Cover plate; 3. Mixing tank;

[0037] Screening components: 41. Cylinder; 42. Conveying pipe; 43. Screen holes; 44. Screw rod one; 45. Long shell; 46. Screw rod two; 47. Base; 48. Drive motor; 49. Synchronous pulley; 410. Double wheel; 411. Collector;

[0038] Spraying assembly: 51. Storage tank; 52. Connecting hose; 53. Mounting base; 54. Moving block; 55. Adjustment hole; 56. Spray head; 57. T-slot; 58. Insert block; 59. Spring;

[0039] Kneading components: 61. Buffer cone; 62. Annular plate; 63. Extrusion teeth; 64. Protective shell; 65. Servo motor; 66. Pinion; 67. Gear ring. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] The embodiments provided by the present invention will be described in detail below:

[0042] A sand-turning device for manufacturing fine sand molds for casting, such as Figure 1 and Figure 2 As shown, it includes a support 1 and a cover plate 2. The cover plate 2 is fixedly connected to the outer wall of the support 1, and a mixing tank 3 is fixedly connected to the bottom surface of the cover plate 2.

[0043] like Figures 2 to 8 As shown, a screening assembly is provided below the cover plate 2. The screening assembly includes a cylinder 41 fixedly connected to the bottom of the cover plate 2. The cylinder 41 is located at the center of the mixing tank 3. Two conveying pipes 42 are symmetrically connected to the side of the cylinder 41. Multiple screen holes 43 are equidistantly opened in the annular shape on the side wall of the cylinder 41. An auger rod 44 is rotatably connected inside the cylinder 41. Two elongated shells 45 are symmetrically fixedly connected to the inner annular surface of the mixing tank 3. An auger rod 46 is rotatably connected inside each elongated shell 45. A base 47 is provided below the mixing tank 3. One end of each of the two auger rods 46 passes through the elongated shell 45 and extends into the interior of the base 47. A drive motor is installed inside the base 47. The machine 48 has two synchronous pulleys 49 and a double wheel 410 rotatably connected inside the base 47. The double wheel 410 is connected to the two synchronous pulleys 49 by a belt. A collector 411 is fixedly connected to the upper surface of the base 47. The collector 411 is located outside the mixing tank 3. A kneading assembly is provided outside the mixing tank 3. The kneading assembly includes a buffer cone 61 fixedly connected to the outer ring surface of the mixing tank 3. The buffer cone 61 is located below the ends of the two conveying pipes 42. An annular plate 62 is rotatably connected inside the collector 411. The annular plate 62 is located outside the mixing tank 3. A plurality of extrusion teeth 63 are fixedly connected in an annular pattern at equal intervals inside the annular plate 62. The extrusion teeth 63 are located outside the buffer cone 61.

[0044] Furthermore, such as Figure 2 and Figure 9 As shown, two semi-circular annular doors and two feed pipes are symmetrically arranged on the upper surface of the cover plate 2. The feed pipes are used to feed fine sand into the mixing tank 3. Two controllable discharge pipes are symmetrically arranged on the bottom surface of the mixing tank 3. The discharge pipes are used to remove the mixed fine sand after mixing is completed. Both conveying pipes 42 are connected to the space between the mixing tank 3 and the annular plate 62. The conveying pipes 42 are used to transport the clumped fine sand to the space between the annular plate 62 and the mixing tank 3.

[0045] Furthermore, such as Figure 3 As shown, a connecting rod is fixedly connected to the bottom of auger rod 44. One end of the connecting rod passes through the interior of the mixing tank 3 and extends into the interior of the base 47. The connecting rod of auger rod 44 is fixedly connected to the output shaft of the drive motor 48 and the double wheel 410. Both synchronous pulleys 49 are fixedly connected to the adjacent auger rod 46. The double wheel 410 is connected to the two synchronous pulleys 49 via a synchronous belt. Therefore, the output shaft of the drive motor 48 can drive auger rod 44 and the two auger rods 46 to rotate. An agitator is provided on auger rod 44. The agitator is used to mix fine sand and binder. This is existing technology. Agitator rod 44 and the two auger rods 46 are both composed of two sections of spiral blades in opposite directions. The forward spiral blade is longer and located at the lower part of the outer ring surface of auger rod 44 and auger rod 46. The reverse spiral blade is shorter and located at the lower part of the outer ring surface of auger rod 44 and auger rod 46. On the upper part of the outer ring surface of auger rod 44 and auger rod 46, the intersection of the forward and reverse spiral blades of auger rod 44 is located at the connection between the conveying pipe 42 and the cylinder 41. The forward and reverse spiral blades of auger rod 44 cooperate to allow fine sand that cannot pass through the sieve hole 43 to be lifted and moved into the conveying pipe 42. Each long shell 45 has two rectangular openings on its outer wall. The two rectangular openings are located at the upper and lower parts of the outer wall of the long shell 45, respectively. The lower rectangular opening is used to collect the fine sand after kneading and tearing. The intersection of the forward and reverse spiral blades of auger rod 46 is located at the rectangular opening at the upper part of the long shell 45. The forward and reverse spiral blades on auger rod 46 cooperate to allow the fine sand lifted in the long shell 45 to be thrown back into the mixing tank 3 from the upper rectangular opening.

[0046] Furthermore, such as Figure 7 and Figure 8 As shown, two collection ports are symmetrically opened inside the collector 411. Both collection ports are set in a cone shape. The cone shape facilitates the collection of fine sand falling into the collector 411 and guides the fine sand to the bottom of the cone surface inside the collection port. The bottom of the cone surface of the collection port corresponds to the rectangular opening at the lower part of the long shell 45. The outer cone surface of the buffer cone 61 is provided with multiple protrusions in a ring. The protrusions are used to increase the friction between the sand and the clumps and slow down the falling speed. The annular plate 62 is rotatably connected to the side of the cover plate 2 near the mixing tank 3. The extrusion teeth 63 are arranged in multiple rows and the length gradually decreases from top to bottom. They are designed to knead and tear the clumps of fine sand that fall to the outer cone surface of the buffer cone 61 for a long time.

[0047] Furthermore, such as Figures 9 to 11As shown, a spraying assembly is provided on the support 1. The spraying assembly includes a storage box 51 fixedly connected to the support 1. The storage box 51 contains adhesive and is connected to four connecting hoses 52. Four fixed seats 53 are fixedly connected at equal intervals on the inner annular surface of the mixing tank 3. The four fixed seats 53 are all located in the upper part of the mixing tank 3. A moving block 54 is horizontally slidably connected in each fixed seat 53. Four adjustment holes 55 are opened on the outer wall of each moving block 54. A spray head 56 is fixedly connected to the side of each adjustment hole 55 away from the cover plate 2. A T-shaped groove 57 is opened on the side of each fixed seat 53 near the adjustment hole 55 of the moving block 54. An insert block 58 is horizontally slidably connected in each T-shaped groove 57. The insert block 58 matches the adjustment hole 55. A spring 59 is fixedly connected between each insert block 58 and the T-shaped groove 57.

[0048] Furthermore, such as Figure 9 As shown, a pressure pump and a timer are installed in the storage tank 51. The timer allows the pressure pump to intermittently deliver the adhesive in the storage tank 51 multiple times. The end of each connecting hose 52 away from the storage tank 51 is connected to the nearest spray head 56, so that the adhesive can be sprayed into the mixing tank 3 through the spray head 56.

[0049] Furthermore, such as Figure 10 and Figure 11 As shown, each insert 58 has a lever fixedly connected to its upper surface. The operator can open the hatch on the cover plate 2 to move the lever. The insert 58 is slidably adapted to the adjustment hole 55. By adjusting the adjustment hole 55 into which the insert 58 is inserted, the specific position of the moving block 54 can be adjusted, thereby adjusting the position of the spray head 56 inside the mixing tank 3 and adjusting the distance between the adhesive and the center of the mixing tank 3 when the adhesive is added to the mixing tank 3.

[0050] Furthermore, such as Figure 12 As shown, the kneading assembly also includes a protective shell 64 fixedly connected to the outer wall of the bracket 1. The protective shell 64 is located between the cover plate 2 and the collector 411. A servo motor 65 is installed on the upper surface of the protective shell 64, and a pinion 66 and a gear ring 67 are rotatably connected inside the protective shell 64.

[0051] Furthermore, such as Figure 12 As shown, the output shaft of the servo motor 65 is fixedly connected to the pinion 66, the pinion 66 is meshed with the gear ring 67, and the gear ring 67 is fixedly connected to the outer ring surface of the annular plate 62.

[0052] During work:

[0053] The operator opens the hatch on the cover plate 2 and pulls the lever on the insert 58 outward. The lever moves the insert 58 horizontally towards the side closer to the spring 59. During this process, the spring 59 is compressed by the insert 58. When the lever on the insert 58 comes into contact with the inner wall on the other side of the T-slot 57, the operator stops pulling the lever. At this time, the insert 58 has left the original insertion hole 55.

[0054] Next, the adjustment hole 55 needs to be selected. If the spray head 56 needs to be close to the center of the mixing tank 3, after selection, pull the moving block 54 so that the moving block 54 drives the spray head 56 to move horizontally away from the fixed base 53 until the selected adjustment hole 55 moves to the position of the insert block 58. At this time, release the lever on the insert block 58. Under the return reset of the spring 59, push the insert block 58 so that the insert block 58 is inserted into the selected adjustment hole 55. At this time, the adjustment and fixation of the moving block 54 are completed. If the spray head 56 needs to be away from the center of the mixing tank 3 next time, after selecting the adjustment hole 55, pull the lever on the insert block 58 to release the fixation of the moving block 54 and push the adjustment hole 55 so that the moving block 54 drives the spray head 56 to move horizontally towards the side close to the fixed base 53. When the selected adjustment hole 55 moves to the position of the insert block 58, fix it with the insert block 58.

[0055] After the staff adjusted the distance between the centers of the spray head 56 and the spiral mixing tank 3, they closed the hatch and started the drive motor 48. The output shaft of the drive motor 48 drove the auger rod 44 to rotate through the connecting rod. The double wheel 410 on the connecting rod drove the auger rod 46 to rotate together through the synchronous belt, so that both the auger rod 44 and the auger rod 46 were in a rotating state. Then, the servo motor 65 was started, so that the output shaft of the servo motor 65 drove the pinion 66 to rotate together. The pinion 66 drove the meshing gear ring 67 to rotate together. The gear ring 67 drove the annular plate 62 and the extrusion teeth 63 to rotate together.

[0056] When both the auger rod 44 and the annular plate 62 are rotating, the operator adds fine sand into the mixing tank 3 through the feed pipe on the cover plate 2. The height of the added fine sand is between the bottom surface of the cylinder 41 and the bottom sieve hole 43. After all the fine sand has been added, the pressure pump in the storage tank 51 is started by the controller and the timer is set, so that the pressure pump delivers the binder intermittently in batches. The binder is delivered to the spray head 56 through the connecting hose 52, and then sprayed into the mixing tank 3 through the spray head 56, thereby mixing and stirring the fine sand and the binder.

[0057] In this way, when using a high-viscosity binder, the spray head 56 can be positioned near the inner wall of the mixing tank 3 beforehand. During the mixing and stirring process with fine sand, the binder will first come into contact with the slower-flowing edge fine sand, achieving gentle premixing and avoiding the formation of lumps that are difficult to disperse. When using a low-viscosity binder, the spray head 56 can be positioned near the center of the mixing tank 3 beforehand. During the mixing and stirring process with fine sand, the binder can be dispersed by the high-speed stirring of fine sand, achieving uniform coating.

[0058] In the above process, the spraying component in this device, through the intermittent spraying of the ring-shaped equidistantly distributed servo motor 65 and the radial movement of the servo motor 65, allows for gentle premixing of high-viscosity binders by moving the spray head 56 to the low-speed stirring zone near the inner wall of the mixing tank 3, thus preventing agglomeration. For low-viscosity binders, the spray head 56 is moved to the high-speed stirring zone near the center of the mixing tank 3, enabling the binder to be quickly and evenly dispersed. This adapts to different types of binders and solves the problem of fixed binder coverage in existing technologies using fixed ring nozzles. In this way, the spraying position can be adjusted when spraying different types of binders, thereby improving the equipment flexibility when mixing fine sand with different binders in the intelligent casting island system.

[0059] This device can simultaneously stir and mix sand, sieve clumps of fine sand, and knead and tear the clumps of sand. The detailed steps are as follows:

[0060] Since the auger rod 44 is rotating, the stirring blades on the outer ring surface of the auger rod 44 and the forward spiral blades exposed outside the sieve holes 43 mix and stir the fine sand and binder in the mixing tank 3. During the mixing and stirring of the fine sand, the fine sand near the auger rod 44 is lifted upward by the forward spiral blades on the auger rod 44, while the fine sand farther away from the outside of the auger rod 44 moves towards the auger rod 44.

[0061] During the upward lifting of fine sand, unclumped fine sand can pass through the screen on the outer ring of the screen hole 43 and return to the mixing tank 3 to continue mixing, while clumped fine sand cannot pass through the screen. The clumped fine sand blocked by the screen is lifted upward by the forward spiral blades on the auger rod 44. When the clumped fine sand moves to the position of the conveying pipe 42, the clumped fine sand comes into contact with the reverse spiral blades on the auger rod 44. Under the thrust generated by the rotation of the reverse spiral blades on the auger rod 44, the clumped fine sand enters the conveying pipe 42 and is conveyed through the conveying pipe 42 to the space between the outer wall of the mixing tank 3 and the inner wall of the annular plate 62, and finally falls on the conical surface of the buffer cone 61.

[0062] When the clumps of fine sand fall onto the conical surface of the buffer cone 61, the protrusions on the conical surface slow down the downward speed of the clumps of fine sand. At the same time, the rotating annular plate 62 drives the squeezing teeth 63 to rotate. When the squeezing teeth 63 come into contact with the clumps of fine sand, the squeezing teeth 63 apply a lateral force to the clumps of fine sand on the conical surface. Through the continuous rotation of the squeezing teeth 63, the clumps of fine sand are repeatedly kneaded and torn, causing the clumps of fine sand to disintegrate and finally fall into the interior of the collector 411.

[0063] After being kneaded and torn, the fine sand falls into the conical collection port of the collector 411. The fine sand that falls into the collection port eventually slides into the rectangular opening at the lower part of the outer wall of the elongated shell 45, thus entering the interior of the elongated shell 45. Since the auger rod 46 is rotating, the forward spiral blades on the outer ring of the auger rod 46 will lift the fine sand inside the elongated shell 45 upward. When the lifted fine sand moves to the position of the rectangular opening at the upper part of the outer wall of the elongated shell 45, the fine sand comes into contact with the reverse spiral blades on the auger rod 46. Under the thrust generated by the rotation of the reverse spiral blades on the elongated shell 45, the fine sand is thrown out from the rectangular opening at the upper part of the outer wall of the elongated shell 45, thus re-entering the interior of the mixing tank 3 for mixing.

[0064] In the above process, the screening component in this device, through the rotation of the forward and reverse spiral blades on the auger rod 44 and in conjunction with the screen holes 43 with screen mesh, lifts and screens the fine sand during the mixing process, effectively screening out the unevenly mixed clumps of fine sand. This integrates the screening function into the mixing process, solving the problem in the prior art where the mixing device has to remove all the mixed fine sand after the mixing process and then screen the clumps, resulting in a cumbersome process. In this way, this device realizes dynamic screening of clumps of fine sand during the mixing process, thereby improving the mixing efficiency of fine sand in the intelligent casting island system.

[0065] In the above process, the screening component and the kneading component of this device cooperate with each other. The rotating extrusion teeth 63 apply a lateral force to the agglomerated fine sand falling onto the buffer cone 61, thereby kneading and tearing the agglomerated fine sand, causing the agglomerated fine sand to disperse. The dispersed fine sand is then reintroduced into the mixing tank 3 for mixing, realizing a continuous kneading, tearing and remixing process. This solves the problem in the prior art where the stirring device only relies on the mutual friction between fine sand to achieve dispersion, resulting in difficulty in dispersing agglomerated sand, or where after mixing, the agglomerated fine sand is screened out and crushed separately, resulting in a long time to mix each batch of fine sand. In this way, this device realizes dynamic and continuous processing of agglomerated fine sand, thereby improving the mixing continuity of fine sand in the intelligent casting island system.

[0066] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand-turning device for manufacturing fine sand molds for casting, comprising a support (1) and a cover plate (2), characterized in that, A mixing tank (3) is provided below the cover plate (2); The mixing tank (3) is equipped with a screening component inside; The screening assembly includes a cylinder (41), a conveying pipe (42), an auger rod one (44), a long shell (45), an auger rod two (46), and a base (47). The outer side of the cylinder (41) is connected to the conveying pipe (42), which is connected to the outer side of the mixing tank (3). The cylinder (41) has multiple screen holes (43). The cylinder (41) is rotatably connected to the auger rod one (44). The mixing tank (3) is equipped with a long shell (45). The long shell (45) is rotatably connected to the auger rod two (46). The outer wall of the long shell (45) has two rectangular openings. The two rectangular openings are located at the upper and lower parts of the outer wall of the long shell (45), respectively. The lower rectangular opening is used to collect fine sand after kneading and tearing. The mixing tank (3) is equipped with a base (47) at the bottom. The base (47) is equipped with components for driving the auger rod one (44) and the auger rod two (46). A collector (411) is fixedly connected to the base (47), and a kneading component is provided outside the mixing barrel (3). The kneading component includes a buffer cone (61) fixedly connected to the outside of the mixing barrel (3). An annular plate (62) is rotatably connected inside the collector (411), and multiple extrusion teeth (63) are fixedly connected in an annular space inside the annular plate (62). The auger rod one (44) is equipped with a stirring blade. The auger rod one (44) and the two auger rods two (46) are both composed of two sections of spiral blades with opposite directions. The intersection of the forward spiral blade and the reverse spiral blade of the auger rod one (44) is located at the connection between the conveying pipe (42) and the cylinder (41). The intersection of the forward spiral blade and the reverse spiral blade of the auger rod two (46) is located at the rectangular opening at the top of the long shell (45). The collector (411) has two symmetrically arranged collection ports, both of which are cone-shaped. The buffer cone (61) has multiple protrusions arranged in a ring. The annular plate (62) is rotatably connected to the cover plate (2). The extrusion teeth (63) are arranged in multiple rows and their length varies along the axial direction of the annular plate (62). The bracket (1) is provided with a spraying assembly, which includes a storage box (51) fixedly connected to the bracket (1). The storage box (51) contains adhesive and is connected to four connecting hoses (52). The mixing tank (3) is fixedly connected with multiple fixed seats (53) at equal intervals in a ring. Each fixed seat (53) is slidably connected with a moving block (54). Each moving block (54) has multiple adjustment holes (55) on its outer wall. Each adjustment hole (55) is fixedly connected with a spray head (56) at its bottom. Each fixed seat (53) has a T-shaped groove (57). Each T-shaped groove (57) is slidably connected with an insert (58). Each insert (58) is fixedly connected with a spring (59) between it and the adjacent T-shaped groove (57). Each of the plugs (58) is fixedly connected with a lever, and each plug (58) is adapted to the adjustment hole (55); The kneading assembly also includes a protective shell (64) fixedly connected to the bracket (1), a servo motor (65) is installed on the protective shell (64), and a pinion (66) and a gear ring (67) are rotatably connected inside the protective shell (64). The output shaft of the servo motor (65) is fixedly connected to the pinion (66), the pinion (66) is meshed with the gear ring (67), and the gear ring (67) is fixedly connected to the ring plate (62).

2. The sand-turning equipment for manufacturing fine sand molds for casting according to claim 1, characterized in that, The cover plate (2) is symmetrically provided with two semi-circular annular doors and two feed pipes, and the bottom of the mixing tank (3) is symmetrically provided with two discharge pipes. Both of the conveying pipes (42) are connected to the inside of the annular plate (62).

3. The sand-turning equipment for manufacturing fine sand molds for casting according to claim 1, characterized in that, The base (47) is equipped with a drive motor (48). Two synchronous pulleys (49) and a double wheel (410) are rotatably connected inside the base (47). A connecting rod is fixedly connected to the bottom of the auger rod (44). The auger rod (44) is fixedly connected to the output shaft of the drive motor (48) and the double wheel (410) through the connecting rod. The two synchronous pulleys (49) are fixedly connected to the adjacent auger rod (46). The double wheel (410) is connected to the two synchronous pulleys (49) through a synchronous belt.

4. The sand-turning equipment for manufacturing fine sand molds for casting according to claim 1, characterized in that, The storage tank (51) is equipped with a pressure pump and a timer, and each of the connecting hoses (52) is connected to the adjacent spray head (56).

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