Turnover mechanism for iron mold coated sand production line

Abstract

The invention belongs to the technical field of iron mold sand coating production lines, and particularly relates to a turnover mechanism for an iron mold sand coating production line, which is characterized in that the turnover mechanism comprises a fixing frame, two clamp frames are arranged in the fixing frame and used for clamping a sand box main body, and hydraulic rods connected with the clamp frames are mounted on the fixing frame; a rotating motor is installed at the position, away from the fixing frame, of the clamp frame, an extension rod is fixed to an output shaft of the rotating motor, a clamping block is fixed to the end of the extension rod, a first shaft rod is fixed to the outer wall of the extension rod, the two ends of the first shaft rod are rotationally connected with ring sleeves through torsional springs, and a connecting frame fixed to the ring sleeves is arranged outside the first shaft rod; clamping plates are installed at the two ends of the connecting frame. The other clamping plate connected with the rotating connecting frame applies extrusion acting force towards the direction of the sand box body, so that the clamping stability of the sand box body in the overturning process is improved, and the stability accuracy after overturning is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of iron mold coated sand production lines, and particularly to a turnover mechanism for an iron mold coated sand production line. Background Art

[0002] The iron mold coated sand process is a process for producing castings by using a mold formed by covering the inner cavity surface of a roughly formed iron mold with a very thin layer of resin sand lining. During the production process, it is necessary to perform a turnover operation on the sand box.

[0003] Referring to the Chinese patent with the patent announcement number CN206483989U, a turnover mechanism for an iron mold coated sand production line is disclosed, which includes a driving gear, a driven gear, an output gear, and a rotating plug. The driven gear, the output gear, and the rotating plug form two rows of transmission arms on both sides of the driving gear; the driven gear is connected in series on both sides of the driving gear, the driven gear and the output gear are connected in parallel, and the rotating plug is connected in series inside the output gear.

[0004] The above patent is the same as the conventional turnover mechanism applied in the production line in the prior art. Generally, the sand box is only clamped by a clamping plate in the middle position and then turned over. However, there are potential safety hazards during the turnover process due to the slippage between the sand box and the clamping plate. Summary of the Invention

[0005] Based on the technical problems in the background art, the present invention proposes a turnover mechanism for an iron mold coated sand production line.

[0006] The turnover mechanism for an iron mold coated sand production line proposed by the present invention includes a fixed frame. Two fixture frames are arranged in the fixed frame and are used for clamping the sand box body. A hydraulic rod connected to the fixture frame is installed on the fixed frame. A rotating motor is installed at a position of the fixture frame far from the fixed frame. An extension rod is fixed to the output shaft of the rotating motor. A clamping block is fixed to the end of the extension rod. A first shaft rod is fixed to the outer wall of the extension rod. Both ends of the first shaft rod are rotatably connected to a collar through a torsion spring. A connecting frame fixed to the collar is arranged outside the first shaft rod. Clamping plates are installed at both ends of the connecting frame. The outer wall of one side of the clamping plate close to the sand box body is flush with the outer wall of the corresponding side of the clamping block.

[0007] Preferably, a first through groove is opened at a position of the fixed frame corresponding to the fixture frame. The outer wall of the end of the fixture frame is in sliding contact with the inner wall of the first through groove. A limiting portion is fixed to the end of the fixture frame far from the sand box body.

[0008] Preferably, a stabilizing assembly is arranged at a position between the two fixture frames close to the fixed frame. The stabilizing assembly is provided with a balance rod connected to the fixed frame. A through hole corresponding to the position of the balance rod is opened on the fixture frame. Springs connected to the fixture frame are fixed to both ends of the circumferential outer wall of the balance rod.

[0009] Preferably, both ends of the balance bar are provided with bending portions that are vertically bent towards the main body of the sand box. At the positions corresponding to the bending portions on the fixture frame, there are through slots two extending horizontally. The width of the through slots two gradually decreases in the direction away from the balance bar. At the positions corresponding to the outer walls of the bending portions and the through slots two, extrusion pads are installed.

[0010] Preferably, on both sides of the through slots two on the outer walls of the bending portions, a first limiting block and a second limiting block are respectively fixed. The widths of the first limiting block and the second limiting block are both greater than the width of the through slots two. At the positions where the first limiting block and the second limiting block are close to the through slots two, gaskets made of silica gel material are installed. The gaskets are in sliding contact with the outer wall of the fixture frame.

[0011] Preferably, a vertically arranged second shaft rod is fixed at the middle position of the balance bar. Both ends of the second shaft rod are rotatably connected to horizontally placed mounting frames through bearings. The mounting frames are fixed to the fixed frame. The inner diameter of the through holes is greater than the outer diameter of the balance bar.

[0012] Preferably, a magnetic block is installed on one side of the second limiting block facing the main body of the sand box. An extension plate is installed at the position of the clamping plate far from the clamping block. One end of the extension plate far from the clamping plate is inclined in the direction away from the main body of the sand box. A magnet is embedded in the extension plate. The magnetic block and the extension plate repel each other magnetically.

[0013] Preferably, it further includes a pressure monitoring module, which is provided with a pressure sensor located between the clamping plate and the connecting frame; an angle monitoring module, which is used to monitor the deflection angle of the balance bar in real time; a tensile force monitoring module, which is provided with a tensile force sensor connected between the spring and the fixture frame.

[0014] Preferably, the monitoring data of the pressure monitoring module, the angle monitoring module and the tensile force monitoring module are uploaded to the processor, and an evaluation coefficient is calculated through comprehensive analysis. The evaluation coefficient is compared with a preset reference coefficient. If the evaluation coefficient is greater than or equal to the reference coefficient, it indicates normal operation. If the evaluation coefficient is less than the reference coefficient, it indicates abnormal operation.

[0015] Preferably, the calculation logic of the evaluation coefficient is as follows: Step 1, the pressure monitoring module obtains the pressure values at the corresponding positions of the four clamping plates in real time, the angle monitoring module obtains the deflection angle of the balance bar in real time, and the tensile force monitoring module obtains the tensile force values of the two springs in real time; Step 2, select the minimum value of the data obtained by the pressure monitoring module and the tensile force monitoring module, and perform normalization processing on the data of the pressure monitoring module, the angle monitoring module and the tensile force monitoring module; Step 3, calculate the evaluation coefficient by weighted summation of the above normalized data.

[0016] The beneficial effects in the present invention are as follows:

[0017] 1. In the present invention, during the flipping process, if the sand box body generates an outward offsetting force under the clamping action of the clamping block, an outward force will be applied to the clamping plate of the clamping block in the offset direction, and another clamping plate connected by the rotating connecting frame will apply an extrusion force towards the sand box body, so as to improve the clamping stability of the sand box body during the flipping process, reduce the offset or avoid excessive offset, thereby improving the stability during the production process and the accuracy of stability after flipping.

[0018] 2. In the present invention, when using the hydraulic rod to make two such fixture frames approach each other for the clamping operation, the extrusion pad moves relative to the second through groove in the direction of the reduction of the width of the second through groove, so that the extrusion pad is gradually squeezed. By means of the extrusion pad, the extrusion stability between the fixture frame, the balance rod and the fixed frame is improved, thereby improving the clamping stability of the sand box body and reducing the influence of the outward pushing force of the self-tension of the sand box body on the fixture frame.

[0019] 3. In the present invention, a magnetic repulsive force is used to apply an outward force to the upper clamping plate, and a rotating connecting frame is used to make the lower clamping plate apply an inward force to the sand box body. And under the magnetic repulsive action, the second limiting block will be pushed upwards, and the gasket on the second limiting block will squeeze the fixture frame, thereby further improving the stability between the fixture frame, the balance rod and the fixed frame, and thus improving the clamping stability during the clamping and flipping process.

[0020] 4. In the present invention, multi-dimensional data can more comprehensively reflect the operating state of the system, which helps to discover potential problems. While ensuring the stability of the sand box body, effective monitoring and early warning are carried out. Comprehensive monitoring combines multiple data for calculation and evaluation, which can take into account more influencing factors, thereby improving the accuracy of the evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of a flipping mechanism for an iron mold coated sand production line proposed by the present invention;

[0022] Figure 2 is a schematic diagram of the structure of the fixture frame of a flipping mechanism for an iron mold coated sand production line proposed by the present invention;

[0023] Figure 3 is a schematic diagram of the structure of the connecting frame of a flipping mechanism for an iron mold coated sand production line proposed by the present invention;

[0024] Figure 4 is a schematic diagram of the position structure of the extension rod of a flipping mechanism for an iron mold coated sand production line proposed by the present invention;

[0025] Figure 5 is a schematic diagram of the position structure of the stabilizing component of a flipping mechanism for an iron mold coated sand production line proposed by the present invention;

[0026] Figure 6 Schematic structural diagram of a balance rod of a turnover mechanism for a resin - coated iron mold production line proposed by the present invention;

[0027] Figure 7 Schematic structural diagram of the position of slot two of a turnover mechanism for a resin - coated iron mold production line proposed by the present invention;

[0028] Figure 8 Schematic structural diagram of the first limit block and the second limit block of a turnover mechanism for a resin - coated iron mold production line proposed by the present invention;

[0029] Figure 9 Schematic structural diagram of slot two and an extrusion pad of a turnover mechanism for a resin - coated iron mold production line proposed by the present invention.

[0030] In the figure: 1 fixing frame, 101 slot one, 2 fixture frame, 201 perforation, 202 slot two, 3 hydraulic rod, 4 rotating motor, 5 extension rod, 501 first shaft rod, 502 collar, 6 clamping block, 7 connecting frame, 701 movable slot, 8 clamping plate, 9 sand box body, 10 stabilizing assembly, 11 balance rod, 111 bending part, 12 second shaft rod, 13 mounting frame, 14 spring, 15 first limit block, 16 second limit block, 17 gasket, 18 extrusion pad, 19 magnet, 20 extension plate. Detailed implementation manners

[0031] Example 1: Refer to Figures 1-9A turning mechanism for an iron mold sand coating production line includes a fixed frame 1, two clamp frames 2 are arranged in the fixed frame 1, the two clamp frames 2 are used to clamp the sand box body 9, a hydraulic rod 3 connected to the clamp frame 2 is installed on the fixed frame 1, two hydraulic rods 3 are arranged, and the two hydraulic rods 3 are respectively used to move the two clamp frames 2, a cylinder structure of the hydraulic rod 3 is fixedly installed between the fixed frame 1, and a telescopic rod end of the hydraulic rod 3 is fixedly installed between the clamp frame 2, so that the clamping and loosening operations of the two clamp frames 2 are realized by the hydraulic rod 3, a rotating motor 4 is installed at a position of the clamp frame 2 away from the fixed frame 1, and the rotating motor 4 is installed at a side position of the clamp frame 2 away from the sand box body 9, and the output shaft of the rotating motor 4 is fixed There is a horizontally extending extension rod 5, and a clamping block 6 is fixed to the end of the extension rod 5 away from the rotating motor 4. An axle rod 501 is fixed to the outer wall of the extension rod 5. The axle rod 501 is vertically arranged to the extension direction of the extension rod 5. Both ends of the axle rod 501 are rotatably connected to a ring sleeve 502 through a torsion spring. A connecting frame 7 fixed to the ring sleeve 502 is arranged outside the axle rod 501. A movable groove 701 is provided at the position corresponding to the connecting frame 7 and the ring sleeve 502. The connecting frame 7 is fixed between the two ring sleeves 502 at the same time, and the movable groove 701 of the connecting frame 7 can be deflected and moved at the position of the axle rod 501. Clamps 8 are installed at both ends of the connecting frame 7. The outer wall of one side of the clamping plate 8 close to the sand box body 9 is flush with the outer wall of one side corresponding to the clamping block 6. It should be noted that: the top of the fixed frame 1 is installed with the lifting frame of the corresponding production line, and the clamp frame 2 is tilted downward in the direction away from the fixed frame 1 as a whole, and the connecting frame 7 is also tilted downward in the direction away from the fixed frame 1 in the normal state. When the sand box body 9 moves between the clamp frames 2 or the clamp frame 2 moves to the corresponding position of the sand box body 9 along with the fixed frame 1, the clamp block 6 is in the middle position of one side of the sand box body 9, and the two clamps 8 on the same side of the sand box body 9 are tilted and distributed at the diagonal position of the sand box body 9; when in use, the two clamp frames 2 are brought closer to each other through the hydraulic rod 3, so that the clamp blocks 6 and clamps 8 on both sides of the sand box body 9 are tightly clamped and fixed to the outer wall of the sand box body 9, and then the lifting machine is used. The structure will rise as a whole and break away from the supporting structure at the bottom of the sand box body 9, and the rotating motor 4 will rotate the clamping block 6 and the clamping plate 8 connected by the connecting frame 7 to carry the sand box body 9 to perform the flipping operation; during the flipping process, if the sand box body 9 generates an outward deflection force under the clamping action of the clamping block 6, the clamping block 6 will apply an outward force to the clamping plate 8 in the deflection direction, and the other clamping plate 8 connected by the rotating connecting frame 7 will apply an extrusion force toward the sand box body 9, so as to improve the clamping stability of the sand box body 9 during the flipping process, reduce the deviation or avoid excessive deviation, so as to improve the stability in the production process, and improve the accuracy of stability after flipping to improve production work efficiency and improve work effect.

[0032] In the present invention, a first through groove 101 is formed at a position on the fixing frame 1 corresponding to the fixture frame 2. The outer wall of the end of the fixture frame 2 is in sliding contact with the inner wall of the first through groove 101. A limiting portion is fixed at one end of the fixture frame 2 away from the sand box body 9. The limiting portion is located at a position of the first through groove 101 away from the sand box body 9, and the width of the limiting portion is greater than the width of the first through groove 101. The fixture frame 2 is position-limited and moved on the fixing frame 1 through the limiting portion, so as to reduce the support load of the hydraulic rod 3 and improve the clamping stability of the fixture frame 2 for the sand box body 9 during long-term operation.

[0033] In the present invention, a stabilizing assembly 10 is arranged at a position between the two fixture frames 2 close to the fixing frame 1. The stabilizing assembly 10 is provided with a balance rod 11 connected to the fixing frame 1. The two ends of the balance rod 11 horizontally extend towards the two fixture frames 2 respectively. The balance rod 11 is arranged in parallel with the extension rod 5. A through hole 201 corresponding to the position of the balance rod 11 is formed on the fixture frame 2. Both ends of the balance rod 11 pass outwards through the through hole 201. Springs 14 connected to the fixture frame 2 are fixed at both ends of the circumferential outer wall of the balance rod 11. The two springs 14 are respectively located on the outer sides of the two fixture frames 2. The outer diameter of the spring 14 gradually increases towards the middle position of the balance rod 11.

[0034] In the present invention, bending portions 111 vertically bent towards the sand box body 9 are arranged at both ends of the balance rod 11. A second through groove 202 extending horizontally is formed on the fixture frame 2 at a position corresponding to the bending portion 111. The second through groove 202 is arranged in parallel with the balance rod 11. The width of the second through groove 202 in the vertical direction gradually decreases towards the direction away from the balance rod 11. An extrusion pad 18 is installed at a position on the outer wall of the bending portion 111 corresponding to the second through groove 202. The width of the extrusion pad 18 in the vertical direction gradually decreases towards the direction away from the balance rod 11. During use, the balance rod 11 is connected to the fixing frame 1. When the two fixture frames 2 are made to approach each other by using the hydraulic rod 3 for clamping operation, the fixture frame 2 will move towards the middle position of the balance rod 11 relative to the bending portion 111, that is, the extrusion pad 18 moves relative to the second through groove 202 towards the direction in which the width of the second through groove 202 decreases, so that the extrusion pad 18 is gradually extruded. When clamping the sand box body 9 through the clamping block 6 and the clamping plate 8, the extrusion stability between the fixture frame 2, the balance rod 11 and the fixing frame 1 is improved through the extrusion pad 18, thereby improving the clamping stability of the sand box body 9 and reducing the influence of the self-tension of the sand box body 9 to push the fixture frame 2 outwards.

[0035] In the present invention, on both sides of the outer wall of the bending portion 111 located in the second through groove 202, a first limiting block 15 and a second limiting block 16 are respectively fixed. The first limiting block 15 is located at a position of the second through groove 202 close to the fixing frame 1, and the second limiting block 16 is located at a position of the second through groove 202 far from the fixing frame 1. The widths of the first limiting block 15 and the second limiting block 16 are both greater than the width of the second through groove 202. Gaskets 17 made of silica gel material are installed at positions of the first limiting block 15 and the second limiting block 16 close to the second through groove 202. The gaskets 17 are in sliding contact with the outer wall of the fixture frame 2. A second shaft rod 12 vertically arranged is fixed at the middle position of the balance rod 11. Both ends of the second shaft rod 12 are rotatably connected to a horizontally placed mounting frame 13 through bearings. The mounting frame 13 is fixed to the fixing frame 1. The inner diameter of the through hole 201 is greater than the outer diameter of the balance rod 11. A magnetic block 19 is installed on one side of the second limiting block 16 facing the sand box main body 9. An extension plate 20 is installed at a position of the clamping plate 8 far from the clamping block 6. One end of the extension plate 20 far from the clamping plate 8 is inclined in a direction away from the sand box main body 9. A magnet is embedded in the extension plate 20. The magnetic block 19 and the extension plate 20 repel each other magnetically. When the two fixture frames 2 approach for clamping operation, the clamping plate 8 and the extension plate 20 above the sand box main body 9 will move towards the corresponding second limiting block 16. The magnetic repulsive force applies an outward force to the upper clamping plate 8, and the lower clamping plate 8 applies an inward force to the sand box main body 9 through the rotating connecting frame 7, so as to improve the bottom supporting stability effect of the sand box main body 9 that rises and falls when rotating or rotating in place; and under the magnetic repulsive action, the second limiting block 16 will be pushed upwards, and the gasket 17 on the second limiting block 16 will squeeze the fixture frame 2, thereby further improving the stability between the fixture frame 2, the balance rod 11 and the fixing frame 1, and thus improving the clamping stability during the clamping and flipping process.

[0036] Embodiment 2: Refer to Figures 1-9 , a flipping mechanism for an iron mold coated sand production line. On the basis of Embodiment 1, it further includes a pressure monitoring module. The pressure monitoring module is provided with a pressure sensor located between the clamping plate 8 and the connecting frame 7. When the monitoring value of one of the pressure sensors corresponding to one of the two clamping plates 8 in the same group is too small, it indicates that the sand box main body 9 may be loose or deviated from the clamping plate 8, and the staff needs to be reminded to make adjustments in time;

[0037] an angle monitoring module. The angle monitoring module is used to monitor the deflection angle of the balance rod 11 in real time. In the normal clamping state, both ends of the balance rod 11 are balanced and horizontal. If the sand box main body 9 slips or becomes loose on one side, causing the clamping plate 8 above to drive the extension plate 20 to deviate, the balance rod 11 will deflect and squeeze the gasket 17. Therefore, if the angle monitoring value is too large, it indicates that the sand box main body 9 may be loose or deviated during the clamping and flipping process, and the staff needs to be reminded in time;

[0038] The tension monitoring module is configured as a tension sensor connected between the spring 14 and the fixture frame 2. When the fixture frame 2 closes for clamping operation, the spring 14 is in a stretched state. When the balance rod 11 deflects or tilts the spring 14, causing the fixed position of the spring 14 and the balance rod 11 to tilt around the middle position of the balance rod 11, that is, the distance between the spring 14 and the fixture frame 2 decreases, so that the tension value decreases when the balance rod 11 tilts. If the tension value is too small, it indicates that the sand box body 9 may become loose or displaced during the clamping and flipping process, and the staff needs to be reminded in time. Thus, the accuracy of monitoring is improved by cross-verifying the data of the tension monitoring module and the angle monitoring module.

[0039] In the present invention, the monitoring data of the pressure monitoring module, the angle monitoring module, and the tension monitoring module are uploaded to the processor, and the evaluation coefficient is calculated through comprehensive analysis. Then, the evaluation coefficient is compared with a preset reference coefficient. If the evaluation coefficient is greater than or equal to the reference coefficient, it indicates normal operation. If the evaluation coefficient is less than the reference coefficient, it indicates that the sand box body 9 may be displaced or loose, and the staff needs to be reminded.

[0040] In the present invention, the calculation logic of the evaluation coefficient is as follows:

[0041] Step 1: The pressure monitoring module obtains the pressure values P1, P2, P3, and P4 at the corresponding positions of the four clamping plates 8 in real time. P1, P2, P3, and P4 respectively represent the pressure values corresponding to the four clamping plates 8. The angle monitoring module obtains the deflection angle θ of the balance rod 11 in real time. The tension monitoring module obtains the tension values F1 and F2 of the two springs 14 in real time. F1 and F2 respectively represent the tension values corresponding to the two springs 14.

[0042] Step 2: Select the minimum value of the data obtained by the pressure monitoring module and the tension monitoring module, and perform normalization processing on the data of the pressure monitoring module, the angle monitoring module, and the tension monitoring module: min{P1, P2, P3, P4} represents the minimum value selected from the four monitoring values. P set represents the maximum pressure value that can be monitored preset, and this value can be determined in advance according to experiments. P n represents the normalized pressure value; θ set represents the maximum angle value that can be monitored preset, and this value can be determined in advance according to experiments. θ n represents the normalized angle value; F set represents the maximum tension value that can be monitored preset, and this value can be determined in advance according to experiments. F n represents the normalized tension value;

[0043] Step 3: Calculate the evaluation coefficient E by weighted summation of the above-normalized data, where E = ω P ×P n + ω θ ×θ n + ω F ×F n , where ω P , ω θ and ω F are evaluation coefficients preset according to experiments, and ω P + ω θ + ω F = 1;

[0044] Compared with the prior art where generally only a pressure sensor is provided at the clamping position for monitoring, this overall monitoring and evaluation method can more comprehensively reflect the operating state of the system through multi-dimensional data, helping to discover potential problems, effectively monitor and give early warnings while ensuring the stability of the sand box body 9. The comprehensive monitoring combines multiple data for calculation and evaluation, which can take into account more influencing factors, thereby improving the accuracy of evaluation and the adaptability of the system to complex environments.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A turning mechanism for a production line of iron mold with sand coating, comprising a fixed frame (1). Two fixture frames (2) are arranged in the fixed frame (1). The two fixture frames (2) are used for clamping the sand box body (9). A hydraulic rod (3) connected to the fixture frame (2) is installed on the fixed frame (1). It is characterized in that, A rotary motor (4) is installed at a position of the fixture rack (2) away from the fixed rack (1). An extension rod (5) is fixed to the output shaft of the rotary motor (4), and a clamping block (6) is fixed to the end of the extension rod (5). A first shaft rod (501) is fixed to the outer wall of the extension rod (5). Both ends of the first shaft rod (501) are rotatably connected to a collar (502) through a torsion spring. A connecting frame (7) fixed to the collar (502) is arranged outside the first shaft rod (501). Clamping plates (8) are installed at both ends of the connecting frame (7). The outer wall of the side of the clamping plate (8) close to the sand box body (9) is flush with the outer wall of the side corresponding to the clamping block (6).

2. The turnover mechanism for a production line of iron mold with sand coating according to claim 1, characterized in that A first through groove (101) is formed at a position of the fixed rack (1) corresponding to the fixture rack (2). The outer wall of the end of the fixture rack (2) is in sliding contact with the inner wall of the first through groove (101). A limiting part is fixed to the end of the fixture rack (2) away from the sand box body (9).

3. The turnover mechanism for a green sand covered iron mold production line according to claim 1, wherein, A stabilizing assembly (10) is arranged at a position between the two fixture racks (2) close to the fixed rack (1). The stabilizing assembly (10) is provided with a balance rod (11) connected to the fixed rack (1). A through hole (201) corresponding to the position of the balance rod (11) is formed in the fixture rack (2). Springs (14) connected to the fixture rack (2) are fixed to both ends of the circumferential outer wall of the balance rod (11).

4. A turnover mechanism for a resin-coated sand production line for iron moulds according to claim 3, wherein, Bending parts (111) vertically bent towards the sand box body (9) are arranged at both ends of the balance rod (11). A second through groove (202) extending horizontally is formed in the fixture rack (2) at a position corresponding to the bending parts (111). The width of the second through groove (202) gradually decreases in the direction away from the balance rod (11). An extrusion pad (18) is installed at a position of the outer wall of the bending part (111) corresponding to the second through groove (202).

5. A turnover mechanism for a production line of iron mold with sand coating according to claim 4, characterized in that A first limiting block (15) and a second limiting block (16) are respectively fixed to both sides of the outer wall of the bending part (111) located in the second through groove (202). The widths of the first limiting block (15) and the second limiting block (16) are both larger than the width of the second through groove (202). Gaskets (17) made of silica gel material are installed at positions of the first limiting block (15) and the second limiting block (16) close to the second through groove (202). The gaskets (17) are in sliding contact with the outer wall of the fixture rack (2).

6. The turnover mechanism for a production line with sand-coated iron molds according to claim 5, characterized in that, A second shaft rod (12) vertically arranged is fixed to the middle position of the balance rod (11). Both ends of the second shaft rod (12) are rotatably connected to a horizontally placed mounting frame (13) through bearings. The mounting frame (13) is fixed to the fixed rack (1). The inner diameter of the through hole (201) is larger than the outer diameter of the balance rod (11).

7. A turning mechanism for a production line of iron mold with coated sand according to claim 6, characterized in that, A magnetic block (19) is installed on the side of the second limiting block (16) facing the sand box body (9). An extension plate (20) is installed at a position of the clamping plate (8) away from the clamping block (6). The end of the extension plate (20) away from the clamping plate (8) is inclined in the direction away from the sand box body (9). A magnet is embedded in the extension plate (20). The magnetic block (19) and the extension plate (20) are magnetically repulsive to each other.

8. The turnover mechanism for a resin-coated sand in iron mold production line according to claim 7, characterized in that, It further includes a pressure monitoring module. The pressure monitoring module is provided with a pressure sensor located between the clamping plate (8) and the connecting frame (7); An angle monitoring module, which is used to monitor the deflection angle of the balance bar (11) in real time; A tensile force monitoring module, which is set as a tensile force sensor connected between the spring (14) and the fixture frame (2).

9. A turnover mechanism for a production line of iron mold coated with sand according to claim 8, characterized in that, Upload the monitoring data of the pressure monitoring module, the angle monitoring module and the tensile force monitoring module to the processor, comprehensively analyze and calculate the evaluation coefficient, and compare the evaluation coefficient with the preset reference coefficient. If the evaluation coefficient is greater than or equal to the reference coefficient, it indicates normal operation. If the evaluation coefficient is less than the reference coefficient, it indicates abnormal operation.

10. A turning mechanism for a resin-coated sand in iron mould production line according to claim 9, characterized in that, The calculation logic of the evaluation coefficient is as follows: Step 1: The pressure monitoring module obtains the pressure values at the corresponding positions of the four clamping plates (8) in real time, the angle monitoring module obtains the deflection angle of the balance bar (11) in real time, and the tensile force monitoring module obtains the tensile force values of the two springs (14) in real time; Step 2: Select the minimum value of the data obtained by the pressure monitoring module and the tensile force monitoring module, and perform normalization processing on the data of the pressure monitoring module, the angle monitoring module and the tensile force monitoring module; Step 3: Calculate the evaluation coefficient by weighted summation of the above-normalized data.

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