Multifunctional sand mold casting device

Abstract

The invention belongs to the technical field of sand casting, and particularly relates to a multifunctional sand casting device which comprises a workbench, the workbench is connected with a molding sand recycling device, a support table device is arranged on the upper surface of the workbench, and a sliding partition plate is slidably connected to the support table device. Vertical upward stand columns are symmetrically and fixedly connected to the two sides of the support table, a cross beam is fixedly connected to the upper ends of the stand columns, a feeding box device and a pressing plate device are fixedly connected to the cross beam, an upper rotating table device and a lower rotating table device which are in bilateral symmetry are slidably connected to the stand columns, and a lower mold box and an upper mold box are rotatably connected between the rotating table devices. The lower molding box and the upper molding box are located between the feeding box device and the support table device. Stable lifting and overturning of the lower mold box and the upper mold box can be guaranteed, deformation of a sand mold cavity is effectively avoided, the labor intensity of workers is reduced, meanwhile, molding sand can be automatically compacted, screened and recycled, and the casting efficiency is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sand casting, and in particular relates to a multifunctional sand casting device. Background Art

[0002] Sand casting is a metal casting process that uses sand as the main casting material. In sand casting, sand is combined with a mold to form a cavity that can hold molten metal. Molten metal is poured into the cavity and cooled to form a casting. Sand casting is a cost-effective method suitable for mass production, especially for the production of complex or large castings. Most of the existing automotive parts with complex shell structures such as cylinder heads, clutch housings, and drive rear axles are formed by sand casting.

[0003] The Chinese invention patent with application number CN202310115734.3 discloses a casting equipment for automobile parts production, including a sand mold box, a casting platform, a lifting and feeding mechanism and a locking assembly. The placement of the bottom box and the top box is guided and positioned by the cooperation of the guide positioning group and the locking assembly, so that the top box can be centered and accurately placed on the top of the bottom box, and the bottom box is locked and fixed to prevent the bottom box from moving when the top box is placed and fixed. Through multi-level guiding and positioning, the problem of deviation in the shape of the cast automobile parts caused by inaccurate placement of the sand mold box during casting and assembly is avoided. In addition, the lifting and feeding mechanism can not only limit the lifting of the top box, but also improve the convenience of sand mold box closing, thereby effectively improving the production efficiency of sand casting. However, in actual sand casting, manual operation is required to make the lower mold and the upper mold before closing the mold. During this process, the upper and lower mold boxes need to be turned over many times, which can easily cause deformation of the sand mold cavity. In addition, the workers' work intensity is high, resulting in low casting efficiency. During the casting process, the loading and unloading of the molding sand and the pressurization and shaping need to be done manually, which also limits the improvement of the casting efficiency. In addition, the existing casting device lacks a molding sand processing device, and the molding sand cannot be screened and processed in time, which affects the recycling of the molding sand.

[0004] Therefore, in view of the above-mentioned deficiencies, the present application proposes a multifunctional sand casting device that can effectively solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a multifunctional sand casting device that can assist workers in flipping the upper mold box and the lower mold box, automatically add and compact the molding sand, and after casting is completed, promptly crush, screen and recover the heated and agglomerated molding sand, thereby effectively solving the problems existing in the prior art.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows: A multifunctional sand casting device comprises a workbench, a sand recovery device is rotatably connected to the center of the workbench, a support table device is arranged on the upper surface of the workbench, a sliding partition is slidably connected to the support table device, vertically upward columns are symmetrically fixedly connected on both sides of the support table device, a cross beam is fixedly connected to the upper end of the column, a loading box device and a pressing plate device are fixedly connected to the cross beam, two sets of upper and lower rotating table devices are symmetrically connected to the columns, the lower rotating table device is fixedly connected to a vertically downward telescopic cylinder device, and the upper rotating table device is fixedly connected to a vertically upward telescopic cylinder device, and the telescopic cylinder devices are respectively fixedly mounted on the cross beam and the workbench, a lower mold box and an upper mold box are rotatably connected between the rotating table devices, and the lower mold box and the upper mold box are located between the loading box device and the support table device.

[0007] As a further arrangement of the above scheme, a mounting circular groove is opened at the center of the upper plate surface of the workbench, and a driving device is provided at the outer edge of the mounting circular groove. The driving device is fixedly connected to the lower end surface of the plate surface of the workbench, and a molding sand recovery device is rotatably connected in the mounting circular groove. The support table device includes a support table, and a baffle plate is provided on the outer edge of the upper end surface of the support table. Positioning notches opening upward are opened on the baffle plates on the left and right sides, and the positioning notch is located directly below the rotating table device. A through circular groove is opened at the center of the support table, and the through circular groove is concentric with the mounting circular groove.

[0008] As a further configuration of the above scheme, the molding sand recovery device includes a recovery frustum, a concentric rotating mounting shaft section is arranged at the lower end of the recovery frustum, a driving gear is opened on the rotating mounting shaft section, the rotating mounting shaft section is rotatably connected in the mounting circular groove, the driving gear is matched with the driving device for transmission connection, a vertically penetrating leakage channel is opened at the center of the recovery frustum, a funnel groove is opened on the upper end surface of the recovery frustum, the upper end opening of the funnel groove coincides with the outer edge of the upper end surface of the recovery frustum, the upper end opening of the funnel groove is connected with the leakage channel, and divergent circularly distributed vertical ribs are arranged on the inner wall surface of the funnel groove, a fixed boss is fixedly connected at the confluence of the ribs, the fixed boss is located directly above the leakage channel, the upper end surface of the ribs is evenly rotatably connected with a friction frustum brush, and the upper end surface of the friction frustum brush is flush with the upper end surface of the recovery frustum.

[0009] As a further configuration of the above scheme, a driving motor is fixedly connected to the lower end of the fixed boss, a vertical crushing shaft is connected to the output shaft at the lower end of the driving motor, and a circumferentially distributed outwardly diverging disturbance columns are staggeredly arranged on the outer wall of the crushing shaft.

[0010] As a further arrangement of the above scheme, a coaxial screen cylinder is installed at the lower end of the rotating mounting shaft section, and a bottom screen plate which can be freely snapped open and closed is hinged at the lower end of the screen cylinder. The screen cylinder and the bottom screen plate are provided with evenly distributed screen holes, and the screen cylinder and the bottom screen plate can form a closed screen cylinder.

[0011] As a further configuration of the above scheme, the rotating table device includes a rotating mounting table, a vertical slide groove is opened on the rotating mounting table, a fixed slider is arranged in the middle of the slide groove, the rotating mounting table is slidably mounted on the column through the slide groove and the slider, a rotating square plate is fixedly connected to the inner side of the rotating mounting table, a rotating annular groove is opened on the inner side of the rotating square plate, and electromagnetic locks are symmetrically arranged on the outer side surface of the rotating square plate and located on both sides of the rotating mounting table, a locking column is arranged on the electromagnetic lock and passes through the rotating square plate, and the locking column is located in the rotating annular groove, a rotating motor is fixedly connected to the outer side of the rotating mounting table, and the output shaft of the rotating motor passes through the slider and the rotating square plate inwardly, and the output shaft passes through the rotating square plate and is located at the center of the rotating square plate, and a connecting plate is fixedly connected to the rotating mounting table, and the connecting plate is fixedly connected to the free end of the telescopic cylinder device.

[0012] As a further arrangement of the above scheme, the structures of the lower mold box and the upper mold box are exactly the same, the lower mold box is located below the upper mold box, the lower mold box includes a mold box body, the mold box body is rectangular as a whole, a circular molding sand cavity is opened in the mold box body, the molding sand cavity and the molding sand recovery device have the same diameter and are aligned up and down, rotating guide ring strips are opened on both side surfaces of the mold box body, the rotating guide ring strips are slidably connected with the rotating ring groove, a connecting hole is provided at the center position of the rotating guide ring strip, and a locking hole is opened on the rotating guide ring strip, and the locking hole corresponds to the electromagnetic lock.

[0013] As a further arrangement of the above scheme, the loading box device is fixedly installed in the middle position of the cross beam, and a telescopic filling tube that can be extended and retracted is arranged at the lower end of the loading box device. The pressure plate device includes a telescopic device, and the telescopic devices are symmetrically arranged on both sides of the loading box device. The telescopic device is vertically installed on the cross beam, and the lower end of the telescopic device passes through the cross beam. A circular pressure plate is fixedly connected to the lower end of the telescopic device, and the circular pressure plate is horizontally arranged and concentric with the molding sand cavity.

[0014] Beneficial effects of the present invention: When using the device for casting and shaping the lower mold and the upper mold of the sand mold cavity, when it is necessary to flip the lower mold box and the upper mold box, the telescopic cylinder device automatically adjusts the position of the lower mold box and the upper mold box on the column through the rotating table device, and the rotating motor drives the lower mold box and the upper mold box to flip. The telescopic cylinder device and the rotating table device ensure that the lower mold box and the upper mold box are smoothly lifted and turned, effectively avoiding deformation of the sand mold cavity, reducing the labor intensity of workers, and improving casting efficiency.

[0015] During the casting process, the loading box device fills the molding sand into the lower mold box and the upper mold box through the telescopic filling tube. The telescopic device drives the circular pressure plate to rise and fall, and the circular pressure plate automatically compacts the molding sand in the lower mold box and the upper mold box, further improving the casting efficiency and quality.

[0016] After the casting is completed, the casting is taken out and the sliding partition is pulled out. The telescopic device drives the circular pressure plate to descend and press the molding sand. The molding sand contacts the molding sand recovery device, and the driving device drives the recovery table to rotate. The molding sand is initially crushed during the rotation of the friction table brush. The initially crushed molding sand enters the screen drum device through the leakage channel and the funnel groove. During the falling process, the molding sand contacts and collides with the crushing shaft for further crushing. The crushing shaft stirs the molding sand at the same time. After being screened by the screen drum and the bottom screen plate, the molding sand falls into the recovery box for recovery. The agglomerated molding sand and metal lumps remain in the screen drum device, which can screen and recover the molding sand in time, thereby improving the efficiency of molding sand recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the appearance of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a schematic diagram of the positions of the workbench and the molding sand recovery device of the present invention; Figure 4 A schematic diagram of a workbench and a support table device of the present invention; Figure 5 It is a schematic cross-sectional axonometric diagram of the molding sand recovery device of the present invention; Figure 6 It is a schematic diagram of assembling the upper mold box and the lower mold box of the present invention; Figure 7 is a first schematic diagram of a rotating table device of the present invention; Figure 8 is a second schematic diagram of the rotating table device of the present invention; Fig. 9 It is a schematic diagram of a lower mold box of the present invention; Fig.10 It is a front view of the loading box device and the pressing plate device of the present invention.

[0018] Workbench; 2. Support table device; 3. Sliding partition; 4. Sand recovery device; 5. Screen drum device; 6. Recovery box; 7. Column; 8. Rotary table device; 9. Telescopic cylinder device; 10. Lower mold box; 11. Upper mold box; 12. Crossbeam; 13. Loading box device; 14. Press plate device; 101. Installation circular groove; 102. Driving device; 201. Support table; 202. Baffle plate; 2021. Positioning notch; 203. Through circular groove; 401. Recovery circular table; 4011. Leakage channel; 4012. Funnel groove; 4013. Rib plate; 4014. Friction circular table brush; 4015. Fixed boss; 402. Rotating installation shaft section; 403 , driving gear; 404, driving motor; 405, crushing shaft; 4051, disturbance column; 501, screen drum; 502, bottom screen plate; 503, screen hole; 801, rotating mounting table; 8011, slide groove; 8012, slider; 802, rotating square plate; 8021, rotating circular ring groove; 803, electromagnetic lock; 8031, locking column; 804, connecting plate; 805, rotating motor; 8051, output shaft; 1001, mold box; 1002, mold sand cavity; 1003, connecting hole; 1004, rotating guide circular ring strip; 1005, locking hole; 1301, telescopic stuffing tube; 1401, round pressure plate; 1402, telescopic device. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 10 The present application is described in detail with reference to embodiments.

[0021] like Figure 1 , Figure 2As shown, the present embodiment discloses a multifunctional sand casting device, wherein a molding sand recovery device 4 is rotatably connected to the center of the workbench 1, a support table device 2 is arranged on the upper surface of the workbench 1, a sliding partition 3 is slidably connected to the support table device 2, vertically upward columns 7 are symmetrically fixedly connected on both sides of the support table device 2, a cross beam 12 is fixedly connected to the upper end of the column 7, a loading box device 13 and a pressing plate device 14 are fixedly connected to the cross beam 12, and two groups of upper and lower rotating table devices 8 symmetrically connected to the column 7 are slidably connected, the lower rotating table device 8 is fixedly connected to a vertically downward telescopic cylinder device 9, and the upper rotating table device 8 is fixedly connected to a vertically upward telescopic cylinder device 9, and the telescopic cylinder device 9 is respectively fixedly installed on the cross beam 12 and the workbench 1, and a lower mold box 10 and an upper mold box 11 are rotatably connected between the rotating table devices 8, and the lower mold box 10 and the upper mold box 11 are located between the loading box device 13 and the support table device 2.

[0022] like Figure 3 , Figure 4 As shown, a mounting circular groove 101 is opened at the center of the upper plate surface of the workbench 1, and a driving device 102 is provided at the outer edge of the mounting circular groove 101. The driving device 102 is fixedly connected to the lower end surface of the upper plate surface of the workbench 1, and a molding sand recovery device 4 is rotatably connected in the mounting circular groove 101. The support table device 2 includes a support table 201, and a baffle plate 202 is provided on the outer edge of the upper end surface of the support table 201. Positioning notches 2021 opening upward are opened on the baffle plates 202 on the left and right sides, and the positioning notches 2021 are located directly below the rotating table device 8. A through circular groove 203 is opened at the center of the support table 201, and the through circular groove 203 is concentric with the mounting circular groove 101.

[0023] like Figure 3 , Figure 5 As shown, the molding sand recovery device 4 includes a recovery truncated table 401, a concentric rotating mounting shaft section 402 is arranged at the lower end of the recovery truncated table 401, a driving gear 403 is opened on the rotating mounting shaft section 402, the rotating mounting shaft section 402 is rotatably connected in the mounting circular groove 101, the driving gear 403 is matched with the driving device 102 for transmission connection, a vertically penetrating material leakage channel 4011 is opened at the center of the recovery truncated table 401, a funnel groove 4012 is opened on the upper end surface of the recovery truncated table 401, and the upper end of the funnel groove 4012 is opened. Coinciding with the outer edge of the upper end face of the recovery cone 401, the upper end opening of the funnel groove 4012 is connected to the leakage channel 4011, and the inner wall surface of the funnel groove 4012 is provided with divergent circularly distributed vertical ribs 4013, and the confluence of the ribs 4013 is fixedly connected with a fixed boss 4015, and the fixed boss 4015 is located directly above the leakage channel 4011. The upper end face of the ribs 4013 is evenly rotated and connected with a friction cone brush 4014, and the upper end face of the friction cone brush 4014 is flush with the upper end face of the recovery cone 401.

[0024] The lower end of the fixed boss 4015 is fixedly connected to a driving motor 404, and a vertical crushing shaft 405 is connected to the output shaft at the lower end of the driving motor 404. The outer wall of the crushing shaft 405 is staggered with circumferentially distributed disturbance columns 4051 that diverge outwards. A coaxial screen drum 501 is installed at the lower end of the rotating installation shaft section 402. A bottom screen plate 502 that can be freely opened and closed is hinged at the lower end of the screen drum 501. The screen drum 501 and the bottom screen plate 502 are provided with evenly distributed screen holes 503. The screen drum 501 and the bottom screen plate 502 can form a closed screening drum. like Figure 6 , Figure 7 , Figure 8 As shown, the rotating table device 8 includes a rotating mounting table 801, a vertical slide groove 8011 is opened on the rotating mounting table 801, a fixed slider 8012 is arranged in the middle of the slide groove 8011, the rotating mounting table 801 is slidably installed on the column 7 through the slide groove 8011 and the slider 8012, a rotating square plate 802 is fixedly connected to the inner side of the rotating mounting table 801, a rotating annular groove 8021 is opened on the inner side of the rotating square plate 802, and electromagnetic lockers 802 are symmetrically arranged on the outer side of the rotating square plate 802 on both sides of the rotating mounting table 801. 3. The electromagnetic lock 803 is provided with a lock column 8031 ​​penetrating the rotating square plate, and the lock column 8031 ​​is located in the rotating annular groove 8021. A rotating motor 805 is fixedly connected to the outer side of the rotating mounting platform 801. The output shaft 8051 of the rotating motor 805 penetrates the slider 8012 and the rotating square plate 802 inwardly, and the output shaft 8051 passes through the rotating square plate 802 and is located at the center of the rotating square plate 802. A connecting plate 804 is fixedly connected to the rotating mounting platform 801, and the connecting plate 804 is fixedly connected to the free end of the telescopic cylinder device 9.

[0025] like Fig. 9 As shown, the structures of the lower mold box 10 and the upper mold box 11 are exactly the same. The lower mold box 10 is located below the upper mold box 11. The lower mold box 10 includes a mold box body 1001. The mold box body 1001 is rectangular as a whole. A circular molding sand cavity 1002 is opened in the mold box body 1001. The molding sand cavity 1002 has the same diameter as the molding sand recovery device 4 and is aligned up and down. Rotating guide ring strips 1004 are opened on both side surfaces of the mold box body 1001. The rotating guide ring strips 1004 are slidingly connected with the rotating ring groove 8021. A connecting hole 1003 is provided at the center position of the rotating guide ring strip 1004. A locking hole 1005 is opened on the rotating guide ring strip 1004, and the locking hole 105 corresponds to the electromagnetic lock 803.

[0026] like Fig.10As shown, the loading box device 13 is fixedly installed in the middle position of the cross beam 12, and a telescopic filling tube 1301 that can be extended is arranged at the lower end of the loading box device 13. The pressure plate device 14 includes a telescopic device 1402, and the telescopic device 1402 is symmetrically arranged on both sides of the loading box device 13. The telescopic device 1402 is vertically installed on the cross beam 12, and the lower end of the telescopic device 1402 passes through the cross beam 12. The lower end of the telescopic device 1402 is fixedly connected with a circular pressure plate 1401, and the circular pressure plate 1401 is horizontally arranged and concentric with the sand cavity 1002.

[0027] The working process of the present invention is as follows: the sliding partition 3 is placed in the baffle plate 202 on the upper end surface of the support table 201, the sliding partition 3 separates the molding sand recovery device 4 and the lower molding box 10, the telescopic cylinder device 9 below is started, and the lower molding box 10 is moved to the lowest position through the rotating table device 8, and the lower end surface of the lower molding box 10 is abutted against the upper end surface of the sliding partition 3. After the mold is placed in the middle of the sliding partition 3, the telescopic filling tube 1301 is started, and after the molding sand is added to the lower molding box 10, the telescopic device 1402 is started to drive the circular pressure plate 1401, and the circular pressure plate 1401 compacts the molding sand, and the telescopic cylinder device 9 below drives the lower molding box 10 to move to the lower molding box 10. After the mold box 10 rises to a certain height, the electromagnetic lock 803 drives the lock column 8031 ​​to pop up, and the lock column 8031 ​​is out of contact with the locking hole 1005, and the lower mold box 10 is unlocked. The rotary motor 805 drives the lower mold box 10 to rotate 180°. Under the guidance of the rotating guide ring bar 1005 and the rotating ring groove 8021, the turning process is smooth to avoid deformation of the molding sand cavity. After turning over, the lower mold box 10 is locked again. At this time, the lower mold moves to the upper part, and the telescopic cylinder device 9 drives the lower mold box 10 to descend to the bottom. The upper telescopic cylinder device 9 drives the upper mold box 11 to descend, and the upper mold box 11 abuts against the lower mold box 10 to make the upper mold. The process of adding, compacting and turning over the molding sand of the upper molding box 11 is consistent with the above process. The telescopic cylinder device 9 automatically adjusts the position of the lower molding box 10 and the upper molding box 11 on the column 7 through the rotating table device 8. The rotating motor 805 drives the lower molding box 10 and the upper molding box 11 to turn over. The telescopic cylinder device 9 and the rotating table device 8 ensure that the lower molding box 10 and the upper molding box 11 are smoothly lifted and turned over, effectively avoiding the deformation of the sand mold cavity, reducing the labor intensity of workers, and improving the casting efficiency. After the casting is completed, the casting is taken out, the sliding partition 3 is pulled out, and the telescopic device 1402 drives the circular pressure plate 1401 to descend and press the molding sand. The molding sand and the molding sand recovery device 4, the driving device 102 drives the recovery cone 401 to rotate, and the friction cone brush 4014 initially crushes the molding sand during rotation. The initially crushed molding sand enters the screen drum device 5 through the leakage channel 4011 and the funnel groove 4012. During the falling process, the molding sand contacts and collides with the crushing shaft 405 to be further crushed. The disturbance column 4051 on the crushing shaft 405 stirs the molding sand at the same time. The molding sand is screened by the screen drum 501 and the sieve holes 503 on the bottom sieve plate 502 and falls into the recovery box for recovery. The agglomerated molding sand and metal lumps remain in the screen drum device 5, so that the molding sand can be screened and recovered in time, thereby improving the recovery efficiency of the molding sand.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multifunctional sand casting device, comprising a workbench, characterized in that: A molding sand recovery device is rotatably connected to the center of the workbench, a support table device is arranged on the upper surface of the workbench, a sliding partition is slidably connected to the support table device, vertically upward columns are symmetrically fixedly connected on both sides of the support table device, a cross beam is fixedly connected to the upper end of the column, a loading box device and a pressing plate device are fixedly connected to the cross beam, and two sets of upper and lower rotating table devices are symmetrically connected to the columns, the lower rotating table device is fixedly connected to a vertically downward telescopic cylinder device, and the upper rotating table device is fixedly connected to a vertically upward telescopic cylinder device, the telescopic cylinder devices are respectively fixedly mounted on the cross beam and the workbench, and a lower mold box and an upper mold box are rotatably connected between the rotating table devices.

2. The multifunctional sand casting device according to claim 1, characterized in that: A mounting circular groove is provided at the center of the upper surface of the workbench, a driving device is provided at the outer edge of the mounting circular groove, and the driving device is fixedly connected to the lower end surface of the upper surface of the workbench. The bracket platform device includes a bracket platform, and a baffle plate is provided on the outer edge of the upper end surface of the bracket platform. Positioning notches opening upward are provided on the baffle plates on the left and right sides, and the positioning notch is located directly below the rotating platform device. A through circular groove is provided at the center of the bracket platform, and the through circular groove is concentric with the mounting circular groove.

3. The multifunctional sand casting device according to claim 2, characterized in that: The molding sand recovery device includes a recovery frustum, a concentric rotating mounting shaft section is arranged at the lower end of the recovery frustum, a driving gear is opened on the rotating mounting shaft section, the rotating mounting shaft section is rotatably connected in the mounting circular groove, the driving gear is matched with the driving device for transmission connection, a vertically penetrating material leakage channel is opened at the center of the recovery frustum, a funnel groove is opened on the upper end surface of the recovery frustum, the upper end opening of the funnel groove coincides with the outer edge of the upper end surface of the recovery frustum, the upper end opening of the funnel groove is connected with the material leakage channel, and the inner wall surface of the funnel groove is provided with divergent circularly distributed vertical ribs, a fixed boss is fixedly connected at the confluence of the ribs, the fixed boss is located directly above the material leakage channel, the upper end surface of the ribs is evenly rotatably connected with a friction frustum brush, and the upper end surface of the friction frustum brush is flush with the upper end surface of the recovery frustum.

4. The multifunctional sand casting device according to claim 3, characterized in that: The lower end of the fixed boss is fixedly connected to a driving motor, the output shaft at the lower end of the driving motor is connected to a vertical crushing shaft, and the outer wall of the crushing shaft is staggered with circumferentially distributed disturbance columns that diverge outwards.

5. The multifunctional sand casting device according to claim 4, characterized in that: A coaxial screen drum is installed at the lower end of the rotating installation shaft section, and a bottom screen plate that can be freely snapped open and closed is hinged at the lower end of the screen drum. The screen drum and the bottom screen plate are provided with evenly distributed screen holes.

6. The multifunctional sand casting device according to claim 1, characterized in that: The rotating table device includes a rotating mounting table, a vertical slide groove is opened on the rotating mounting table, a fixed slider is arranged in the middle of the slide groove, the rotating mounting table is slidably mounted on the column through the slide groove and the slider, a rotating square plate is fixedly connected to the inner side of the rotating mounting table, a rotating annular groove is opened on the inner side of the rotating square plate, and electromagnetic locks located on both sides of the rotating mounting table are symmetrically arranged on the outer side surface of the rotating square plate, a locking column penetrating the rotating square plate is arranged on the electromagnetic lock, and the locking column is located in the rotating annular groove, a rotating motor is fixedly connected to the outer side of the rotating mounting table, and the output shaft of the rotating motor penetrates the slider and the rotating square plate inwardly, and the output shaft passes through the rotating square plate and is located at the center of the rotating square plate, and a connecting plate is fixedly connected to the rotating mounting table, and the connecting plate is fixedly connected to the free end of the telescopic cylinder device.

7. The multifunctional sand casting device according to claim 6, characterized in that: The structures of the lower mold box and the upper mold box are exactly the same. The lower mold box is located below the upper mold box. The lower mold box includes a mold box body. The mold box body is rectangular as a whole. A circular sand cavity is opened in the mold box body. The sand cavity has the same diameter as the sand recovery device and is aligned up and down. Rotating guide ring strips are opened on both side surfaces of the mold box body. The rotating guide ring strips are slidably connected to the rotating ring grooves. A connecting hole is provided at the center position of the rotating guide ring strip. A locking hole is opened on the rotating guide ring strip. The locking hole corresponds to the electromagnetic lock.

8. The multifunctional sand casting device according to claim 1, characterized in that: The feeding box device is fixedly installed in the middle position of the cross beam, and a telescopic filling tube that can be extended and retracted is arranged at the lower end of the feeding box device. The pressure plate device includes a telescopic device, and the telescopic devices are symmetrically arranged on both sides of the feeding box device. The telescopic device is vertically installed on the cross beam, and the lower end of the telescopic device passes through the cross beam. A circular pressure plate is fixedly connected to the lower end of the telescopic device, and the circular pressure plate is horizontally arranged and concentric with the molding sand cavity.

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