Lost foam casting production line

Abstract

The invention relates to an evanescent mode casting production line, and belongs to the technical field of casting, the evanescent mode casting production line comprises a molding conveying line and a plurality of pouring conveying lines which are arranged side by side, one ends of the molding conveying line and the plurality of pouring conveying lines are provided with the same first conveying track, and the other ends are provided with the same second conveying track; a first transfer trolley is slidably arranged on the first conveying track in the length direction of the first conveying track, a second transfer trolley is slidably arranged on the second conveying track in the length direction of the second conveying track, a box turning station, a bottom sand station, a part loading station, a sand filling station and a facing sand station are sequentially arranged on the molding conveying line, and a pouring station is arranged on the pouring conveying line. A first pushing piece used for pushing the sand box to the molding conveying line from the first transfer trolley is arranged on the side, away from the molding conveying line, of the first conveying track, and a second pushing piece used for pushing the sand box to the pouring conveying line from the second transfer trolley is arranged on the second transfer trolley. The production efficiency of the casting production line can be improved.

Description

Technical Field

[0001] The present application relates to the field of casting, and in particular to a lost foam casting production line. Background Art

[0002] Lost foam casting (also known as negative pressure dry sand solid casting) is a new casting method that uses a foam plastic mold with binderless molding sand combined with vacuum technology. It is a foam model with a similar size and shape to the casting that is bonded together into a model cluster, coated with refractory paint and dried, then buried in dry quartz sand for vibration molding, poured under negative pressure, and the liquid metal occupies the model position. After solidification and cooling, the casting is formed.

[0003] The existing lost foam casting production line sets up a closed loop conveyor line, on which sand adding and molding stations, pouring stations, sand discharging stations, etc. are arranged in sequence, and sand boxes are arranged at intervals on the loop production line. The sand boxes are driven by a driving mechanism to intermittently move on the conveyor line, so that the sand boxes pass through each station in sequence and finally complete the casting.

[0004] Regarding the above technical solution, the inventor believes that during the production process, only one sand box can be poured at the same time, and the time required to complete the pouring is longer than the time required to complete other single processes. This results in that after the process before the pouring process is completed, it is necessary to wait for the previous sand box to complete the pouring before continuing, thereby reducing the overall production efficiency of the production line. Summary of the invention

[0005] In order to improve the production efficiency of the production line, the present application provides a lost foam casting production line.

[0006] The application provides a lost foam casting production line, which adopts the following technical solution:

[0007] A lost foam casting production line comprises a molding conveyor line and a plurality of pouring conveyor lines arranged side by side, wherein the molding conveyor line and the plurality of pouring conveyor lines are provided with a same first conveying track at one end and a same second conveying track at the other end, a first transfer trolley is provided on the first conveying track for sliding along its length direction, and a second transfer trolley is provided on the second conveying track for sliding along its length direction, a box turning station, a bottom sand station, a component loading station, a sand filling station and a surface sand station are sequentially provided on the molding conveyor line, a pouring station is provided on the pouring conveyor line, a first pushing member for pushing a sand box from the first transfer trolley to the molding conveyor line is provided on the side of the first conveying track away from the molding conveyor line, and a second pushing member for pushing the sand box from the second transfer trolley to the pouring conveyor line is provided on the second transfer trolley.

[0008] By adopting the above technical solution, the molding conveyor line, the plurality of pouring conveyor lines, the first conveyor track and the second conveyor track form a circulating conveying loop. When used for the first time, the sand box is placed on the molding conveyor line. When the sand box reaches the box turning station, it is turned over and the remaining sand in the sand box is dumped out; then when it reaches the bottom sand station, the bottom sand is filled and vibrated, and when it passes the loading station, the mold is manually loaded, and the lost foam model is placed above the bottom sand; then it passes through the sand filling station and the surface sand station in sequence to fill and shape the molding sand and add and arrange the surface sand, so as to complete the sand box molding; the sand box after molding is moved on the second conveying track by the second transfer trolley, and the second pushing member can push the sand box to the pouring conveyor line. When the sand box passes the pouring station, the pouring process is completed. After the pouring, the sand box continues to move along the pouring conveyor line and is cooled until it reaches the first conveying track, and is taken over by the first transfer trolley and transferred to one side of the molding conveyor line. After the sand box is pushed to the molding conveyor line by the first pushing member, it is moved to the box turning station for turning, and the molding sand and castings in the sand box are poured out. By setting up multiple pouring conveyor belts and multiple pouring stations, multiple sand boxes can be poured at the same time, which is helpful to save pouring time and thus improve the overall production efficiency of the casting production line.

[0009] Optionally, a box turning machine is provided at the box turning station, and a vibrating sand shaking machine is provided on the side of the box turning machine away from the pouring conveyor line, for receiving the molding sand and castings dumped when the sand box is turned over, the molding sand discharge end of the vibrating sand shaking machine is connected to a molding sand recovery mechanism, and the casting discharge end of the vibrating sand shaking machine is provided with a casting conveying device.

[0010] By adopting the above technical scheme, when the sand box passes through the box turning station, the box turning machine turns it over, and pours the molding sand and castings in the sand box into the vibrating sand falling machine. The vibrating sand falling machine breaks the sand clumps and separates the molding sand and castings. The separated molding sand enters the molding sand recovery mechanism through the molding sand discharge end to realize the recycling of the molding sand, and the castings enter the casting conveying device through the casting discharge end to realize the transportation of the castings, thereby realizing the automatic collection of castings and the recycling of molding sand, and further improving the overall production efficiency of the production line.

[0011] Optionally, the molding sand recovery mechanism includes a vibrating screen, a water-cooling fan, a cooling bed and a scraper divider which are arranged in sequence. The input end of the vibrating screen is connected to the molding sand discharge end of the vibrating sand shaker. The output end of the scraper divider is provided with a molding sand lifting mechanism for providing the required molding sand to the bottom sand station, the sand filling station and the surface sand station.

[0012] By adopting the above technical scheme, the recovered molding sand enters the vibrating screen for screening. After the screening, the molding sand is cooled by the water-cooling fan and the cooling bed, and then the molding sand is evenly spread by the scraper distributor and transported to the molding sand lifting mechanism, so as to realize the recovery, feeding and recycling of the molding sand.

[0013] Optionally, a compaction table is provided at the bottom sand station and the sand filling station, the molding sand lifting mechanism includes an elevator and a discharge bin, the input end of the elevator is connected with the output end of the scraper distributor, the input end of the discharge bin is connected with the output end of the elevator, the output end of the discharge bin is arranged directly above the compaction table, and the compaction table is provided with a clamping mechanism for clamping the sand box.

[0014] By adopting the above technical solution, when the sand box moves to the bottom sand station and the sand filling station, the sand box is located on the vibration table, and the elevator lifts the molding sand output by the scraper distributor to the discharge bin, and the discharge bin injects molding sand into the sand box. When the sand box completes the injection of the corresponding molding sand, the clamping mechanism clamps the sand box, and the vibration table vibrates the molding sand in the sand box. Through the clamping effect of the clamping mechanism, the possibility of the sand box being displaced on the vibration table when the vibration table is vibrating the molding sand is reduced, thereby reducing the possibility of the sand box falling from the vibration table, and ensuring the vibration effect of the molding sand.

[0015] Optionally, the clamping mechanism includes a fixed frame arranged on the side wall of the compaction table and a connecting rod arranged on the fixed frame, the connecting rod is rotatably connected to the fixed frame, a clamping block is provided on the lower side of one end of the connecting rod close to the compaction table, a lifting rod is provided on the lower side of one end of the connecting rod away from the pressing block, and a lifting drive component for driving the lifting rod to rise and fall is provided on the fixed frame.

[0016] By adopting the above technical solution, when the lifting drive member starts to drive the lifting rod to rise, the connecting rod rotates, driving the pressing block to move downward until the pressing block presses against the top of the sand box, thereby achieving the purpose of pressing the sand box. The structure is simple and easy to operate.

[0017] Optionally, a limiting mechanism for limiting the bottom of the sand box is provided on the table top of the compaction table, and the limiting mechanism includes four limiting angles adapted to the corner ends of the sand box. The compaction table is provided with a driving mechanism for driving the four limiting angles to simultaneously retract inward or expand outward.

[0018] By adopting the above technical solution, when the sand box to be vibrated moves toward the vibrating table, the four limiting angles are in a scattered state, and the distance between two adjacent limiting angles is large, so that the sand box to be vibrated can pass between the two limiting angles; when the sand box moves to the center of the vibrating table, the driving mechanism starts, driving the four limiting angles to move inward at the same time, until the limiting angles abut against the bottom corners of the adjacent corresponding sand box, so as to limit the sand box and further reduce the possibility of relative displacement between the sand box and the vibrating table during vibration. After the vibration is completed, the driving mechanism starts, driving the four limiting angles to disperse outward at the same time, so as to facilitate the intermittent movement of the sand box on the molding conveyor line, and also facilitate the next sand box to be vibrated to move to the vibrating table through the limiting angles.

[0019] Optionally, the driving mechanism includes two symmetrically arranged driving plates, the driving plates are arranged along the width direction of the vibration table, the driving plates are slidably arranged inside the vibration table along the length direction of the vibration table, the vibration table is provided with a accommodating space for accommodating the driving plates, the table surface of the vibration table is provided with diagonal guide grooves corresponding to the limit angles, the diagonal guide grooves are connected with the accommodating space, a moving rod is passed through the diagonal guide grooves, the bottom ends of the moving rods are slidably connected with the corresponding driving plates along the length direction of the driving plates, the top ends of the moving rods are fixed to the bottom center of the corresponding limit angles, the length direction of the diagonal guide grooves is the same as the direction of the diagonal connecting lines of the four limit angles, and the accommodating space is provided with a driving component for driving the driving plates to approach toward or move away from each other.

[0020] By adopting the above technical solution, when the driving assembly drives the driving plates toward each other, the driving plates drive the moving rods on both sides of the driving assembly toward each other, and through the guiding effect of the diagonal guide grooves, the moving rods gradually move closer and shrink along the length direction of the diagonal guide grooves; when the driving assembly drives the driving plates away from each other, the driving plates drive the moving rods on both sides of the driving assembly away from each other, and through the guiding effect of the diagonal guide grooves, the moving rods gradually expand outwards and away from each other along the length direction of the diagonal guide grooves, thereby achieving the purpose of driving the four limit angles to shrink inwards or expand outwards at the same time.

[0021] Optionally, the driving assembly includes a driving motor and an active bevel gear arranged in the accommodating space, the active bevel gear and the output ends of the driving motor are coaxially fixed, the active bevel gear is simultaneously meshed with two relatively arranged driven bevel gears, a stud is coaxially fixed to the big head end of the driven bevel gear, the stud is rotatably arranged in the accommodating space along the length direction of the vibration table, the end of the stud away from the driven bevel gear is threadedly connected with a threaded sleeve, a slider is provided on the threaded sleeve, the slider is slidably connected to the inner wall of the accommodating space, and the end of the threaded sleeve away from the stud is connected to the center of one side of an adjacent driving plate.

[0022] By adopting the above technical scheme, when the driving motor rotates, it drives the active bevel gear to rotate, and the rotation of the active bevel gear drives the two driven bevel gears to rotate, and the rotation of the two driven bevel gears respectively drives the corresponding studs to rotate, and the rotation of the studs drives the threaded sleeve to move along the length direction of the vibration table, so that the purpose of driving the driving plates to move towards each other or away from each other is achieved through one driving source, and then the purpose of driving the four limit angles to complete the inward contraction and outward expansion is achieved through one driving source, which saves the number of driving sources installed, improves energy efficiency, and ensures the synchronization rate of the movement of the four limit angles, so that the four limit angles are clamped in place at the same time.

[0023] Optionally, the bottom wall of the accommodating space is inclined, and a certain distance is left between the bottom wall of the driving plate and the bottom wall of the accommodating space; one side of the compaction table is provided with a cleaning port connected to the accommodating space; the cleaning port is arranged at the inclined lower end of the bottom wall of the accommodating space and the lower end of the cleaning port is not higher than the inclined lower end of the bottom wall of the accommodating space.

[0024] By adopting the above technical solution, the dust generated in the production workshop enters the accommodating space through the diagonal guide groove, slides downward along the bottom wall of the accommodating space, and is finally discharged from the cleaning port, thereby reducing the possibility of dust accumulation in the accommodating space and ensuring that the drive plate can move smoothly.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the setting of multiple pouring conveyor belts and multiple pouring stations, multiple sand boxes can be poured at the same time, which is helpful to save pouring time and thus improve the overall production efficiency of the casting production line;

[0027] 2. Through the setting of four limiting angles and diagonal guide grooves, when the sand box to be vibrated moves toward the vibrating table, the four limiting angles are in a scattered state, and the distance between two adjacent limiting angles is large, so that the sand box to be vibrated can pass between the two limiting angles; when the sand box moves to the center of the vibrating table, the driving mechanism starts, driving the four limiting angles to move inward at the same time until the limiting angles abut against the bottom corners of the adjacent corresponding sand box, so as to limit the sand box and further reduce the possibility of relative displacement between the sand box and the vibrating table during vibration. After the vibration is completed, the driving mechanism starts, driving the four limiting angles to disperse outward at the same time, so as to facilitate the intermittent movement of the sand box on the molding conveyor line, and also facilitate the next sand box to be vibrated to move to the vibrating table through the limiting angles.

[0028] 3. Through the arrangement of the driving motor, the active bevel gear, the driven bevel gear, the stud and the threaded sleeve, when the driving motor rotates, the active bevel gear is driven to rotate, the rotation of the active bevel gear drives the two driven bevel gears to rotate, the rotation of the two driven bevel gears respectively drives the corresponding studs to rotate, the rotation of the stud drives the threaded sleeve to move along the length direction of the vibration table, so that the purpose of driving the driving plates to move towards each other or away from each other is achieved through one driving source, and then the purpose of driving the four limit angles to complete the inward contraction and outward expansion is achieved through one driving source, which saves the number of driving sources installed, improves energy efficiency, ensures the synchronization rate of the movement of the four limit angles, and ensures that the four limit angles are clamped in place at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a lost foam casting production line according to an embodiment of the present application.

[0030] Figure 2 It is a structural schematic diagram of the molding sand recovery mechanism in the embodiment of the present application.

[0031] Figure 3 It is a structural schematic diagram of the molding sand lifting mechanism in the embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the structure of the vibrating table and the clamping mechanism in the embodiment of the present application.

[0033] Figure 5 It is a cross-sectional view showing the internal structure of the vibration table in the embodiment of the present application.

[0034] Figure 6 It is a schematic diagram of the structure of the driving mechanism in the embodiment of the present application.

[0035] Figure 7 It is a cross-sectional view showing the internal structure of the dust cover in the embodiment of the present application, and is used to show the specific structure of the drive assembly.

[0036] Description of the accompanying drawings: 1. Molding conveyor line; 11. Box turning station; 111. Box turning machine; 112. Vibrating sand falling machine; 113. Casting conveying device; 12. Bottom sand station; 13. Loading station; 14. Sand filling station; 15. Surface sand station; 2. Pouring conveyor line; 21. Pouring station; 3. First conveying track; 31. First transfer trolley; 32. First pusher; 4. Second conveying track; 41. Second transfer trolley; 411. Second pusher; 5. Molding sand recovery mechanism; 51. Vibrating screen; 52. Water cooling fan; 53. Cooling bed; 54. Scraper distributor; 6. Molding sand lifting mechanism; 6 1. Elevator; 62. Discharge bin; 7. Vibrating table; 71. Pressing mechanism; 711. Fixed frame; 712. Connecting rod; 713. Pressing block; 714. Lifting rod; 715. Lifting drive; 72. Accommodating space; 721. Dust cover; 7211. Avoidance hole; 73. Diagonal guide groove; 74. Cleaning port; 8. Limiting mechanism; 81. Limiting angle; 82. Driving mechanism; 821. Driving plate; 83. Moving rod; 84. Driving assembly; 841. Driving motor; 842. Driving bevel gear; 843. Driven bevel gear; 844. Stud; 845. Threaded sleeve; 8451. Sliding block. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 , further details of this application are given.

[0038] The present application embodiment discloses a lost foam casting production line. Figure 1 A lost foam casting production line comprises a molding conveyor line 1 and a plurality of pouring conveyor lines 2 arranged side by side, wherein the molding conveyor line 1 and the plurality of pouring conveyor lines 2 are provided with a same first conveying track 3 at one end and a same second conveying track 4 at the other end, a first transfer trolley 31 is slidably provided on the first conveying track 3 along its own length direction, and a second transfer trolley 41 is slidably provided on the second conveying track 4 along its own length direction.

[0039] Reference Figure 1 The molding conveyor line 1 is provided with a box turning station 11, a bottom sand station 12, a component loading station 13, a sand filling station 14 and a surface sand station 15 in sequence, and each pouring conveyor line 2 is provided with a plurality of pouring stations 21. A first pusher 32 for pushing the sand box from the first transfer trolley 31 to the molding conveyor line 1 is installed on the side of the first conveying track 3 away from the molding conveyor line 1, and a second pusher 411 for pushing the sand box from the second transfer trolley 41 to the pouring conveyor line 2 is installed on the second transfer trolley 41. In this embodiment, the first pusher 32 and the second pusher 411 can be one of a pneumatic push rod, an electric push rod and a hydraulic push rod.

[0040] The molding conveyor line 1, multiple pouring conveyor lines 2, and the first conveyor track 3 and the second conveyor track 4 form a circular conveying loop. When used for the first time, the sand box is placed on the molding conveyor line 1. When the sand box reaches the box turning station 11, it is turned over and the remaining sand in the sand box is dumped out; then when it reaches the bottom sand station 12, the bottom sand is filled and vibrated, and when it passes the loading station 13, the mold is manually loaded and the lost foam model is placed on the bottom sand; then it passes through the sand filling station 14 and the surface sand station 15 in turn to fill and shape the molding sand and add and arrange the surface sand, so as to complete the sand box molding; the sand box after molding is transferred to the second transfer trolley 41 at the first The sand box moves on the second conveying track 4, the second pushing member 411 can push the sand box to the pouring conveyor line 2, the pouring process is completed when the sand box passes the pouring station 21, and the sand box after pouring continues to move along the pouring conveyor line 2 and is cooled until it reaches the first conveying track 3, and is then taken over by the first transfer trolley 31 and transferred to one side of the molding conveyor line 1. After the sand box is pushed to the molding conveyor line 1 by the first pushing member 32, it is moved to the box turning station 11 for turning over, and the molding sand and castings in the sand box are poured out.

[0041] Reference Figure 1 and Figure 2 A box turning machine 111 is provided at the box turning station 11, and a vibrating sand falling machine 112 is provided on the side of the box turning machine 111 away from the pouring conveyor line 2. The vibrating sand falling machine 112 is used to receive the molding sand and castings dumped when the sand box is turned over. The molding sand discharge end of the vibrating sand falling machine 112 is connected to the molding sand recovery mechanism 5, and the casting discharge end of the vibrating sand falling machine 112 is installed with a casting conveying device 113. In this embodiment, the casting conveying device 113 is a lin board conveyor. When the sand box passes through the box turning station 11, the box turning machine 111 turns the sand box over, and pours the molding sand and castings in the sand box into the vibrating sand falling machine 112. The vibrating sand falling machine 112 breaks the sand clumps and separates the molding sand and the castings. The separated molding sand enters the molding sand recovery mechanism 5 through the molding sand discharge end to realize the recycling of the molding sand, and the castings enter the casting conveying device 113 through the casting discharge end to realize the transportation of the castings, thereby realizing the automatic collection of castings and the recycling of molding sand.

[0042] Reference Figure 2 The molding sand recovery mechanism 5 includes a vibrating screen 51, a water-cooling fan 52, a cooling bed 53 and a scraper distributor 54 arranged in sequence. The input end of the vibrating screen 51 is connected to the molding sand discharge end of the vibrating sand shaker 112. The output end of the scraper distributor 54 is provided with a molding sand lifting mechanism 6, which is used to provide the required molding sand to the bottom sand station 12, the filling sand station 14 and the surface sand station 15. The recovered molding sand enters the vibrating screen 51 for screening. After the screening molding sand is cooled by the water-cooling fan 52 and the cooling bed 53, the molding sand is evenly spread by the scraper distributor 54 and transported to the molding sand lifting mechanism 6, so as to realize the recovery, feeding and recycling of the molding sand.

[0043] Reference Figure 1-3 A vibrating table 7 is installed at the bottom sand station 12 and the sand filling station 14. The molding sand lifting mechanism 6 includes an elevator 61 and a discharge bin 62. The input end of the elevator 61 is connected to the output end of the scraper distributor 54, and the input end of the discharge bin 62 is connected to the output end of the elevator 61. The output end of the discharge bin 62 is arranged directly above the vibrating table 7. The vibrating table 7 is provided with a clamping mechanism 71 for clamping the sand box.

[0044] Reference Figure 4 The clamping mechanism 71 includes a plurality of fixed frames 711 welded to the side wall of the vibration table 7 and a connecting rod 712 rotatably connected to the fixed frame 711. A clamping block 713 is fixed to the lower side of the end of the connecting rod 712 close to the vibration table 7, and a lifting rod 714 is fixed to the lower side of the end of the connecting rod 712 away from the pressing block 713. A lifting driving member 715 for driving the lifting rod 714 to move up and down is installed on the fixed frame 711. In this embodiment, the lifting driving member 715 is a cylinder.

[0045] When the sand box moves to the bottom sand station 12 and the sand filling station 14, the sand box is located on the vibration table 7, and the elevator 61 lifts the molding sand output by the scraper distributor 54 to the discharge bin 62, and the discharge bin 62 injects the molding sand into the sand box. After the sand box completes the injection of the corresponding molding sand, the lifting drive 715 starts to drive the lifting rod 714 to rise, and the lifting rod 714 rises to drive the connecting rod 712 to rotate, and the connecting rod 712 rotates to drive the clamping block 713 to move downward until the clamping block 713 is pressed against the top of the sand box to achieve the clamping effect. After the sand box is compacted, the vibration table 7 compacts the molding sand in the sand box. Through the compacting effect of the clamping mechanism 71, the possibility of the sand box being displaced on the vibration table 7 when the vibration table 7 is vibrating the molding sand is reduced, thereby reducing the possibility of the sand box falling from the vibration table 7 and ensuring the compacting effect of the molding sand.

[0046] Reference Figure 4 and Figure 5The surface of the vibration table 7 is provided with a limiting mechanism 8 for limiting the bottom of the sand box. The limiting mechanism 8 includes four limiting angles 81 adapted to the corner ends of the sand box. The limiting angles 81 are slidably connected to the vibration table 7. The vibration table 7 is provided with a driving mechanism 82 for driving the four limiting angles 81 to simultaneously shrink inward or expand outward. When the sand box to be vibrated moves toward the vibration table 7, the four limiting angles 81 are in a scattered state, and the distance between two adjacent limiting angles 81 is large, so that the sand box to be vibrated passes between the two limiting angles 81; when the sand box moves to the center of the vibration table 7, the driving mechanism 82 is started, driving the four limiting angles 81 to move inward at the same time, until the limiting angles 81 abut against the adjacent corresponding corner ends of the bottom of the sand box, so as to limit the sand box, and further reduce the possibility of relative displacement between the sand box and the vibration table 7 during vibration. After compaction is completed, the driving mechanism 82 is started, driving the four limit angles 81 to disperse outward at the same time, so as to facilitate the intermittent movement of the sand box on the molding conveyor line 1, and also facilitate the next sand box to be compacted to move to the compaction table 7 through the limit angles 81.

[0047] Reference Figure 5 and Figure 6 The driving mechanism 82 includes two symmetrically arranged driving plates 821, which are arranged along the width direction of the vibration table 7 and are slidably arranged inside the vibration table 7 along the length direction of the vibration table 7. A receiving space 72 for accommodating the driving plates 821 is provided in the vibration table 7. A diagonal guide groove 73 corresponding to the limiting angle 81 is provided on the table surface of the vibration table 7. The diagonal guide groove 73 is connected with the receiving space 72. A moving rod 83 is passed through the diagonal guide groove 73. The bottom end of the moving rod 83 is slidably connected with the corresponding driving plate 821 along the length direction of the driving plate 821, and the top end of the moving rod 83 is fixed to the bottom center of the corresponding limiting angle 81. The length direction of the diagonal guide groove 73 is the same as the direction of the diagonal line connecting the four limiting angles 81. A driving component 84 for driving the driving plates 821 to move toward each other or away from each other is provided in the receiving space 72. When the driving assembly 84 drives the driving plate 821 to approach each other, the driving plate 821 drives the moving rods 83 on both sides of the driving assembly 84 to approach each other, and through the guiding effect of the diagonal guide groove 73, the moving rods 83 gradually move closer and shrink along the length direction of the diagonal guide groove 73; when the driving assembly 84 drives the driving plate 821 to move away from each other, the driving plate 821 drives the moving rods 83 on both sides of the driving assembly 84 to move away from each other, and through the guiding effect of the diagonal guide groove 73, the moving rods 83 gradually expand outwards and away from each other along the length direction of the diagonal guide groove 73, thereby achieving the purpose of driving the four limit angles 81 to shrink inwards or expand outwards at the same time.

[0048] Reference Figure 5-7The driving assembly 84 includes a driving motor 841 and a driving bevel gear 842 disposed in the accommodating space 72. The driving bevel gear 842 and the output end of the driving motor 841 are coaxially fixed, and the driving bevel gear 842 is simultaneously meshed with two oppositely disposed driven bevel gears 843. A stud 844 is coaxially fixed to the large end of the driven bevel gear 843. The stud 844 is rotated along the length direction of the vibration table 7 and disposed in the accommodating space 72. A threaded sleeve 845 is threadedly connected to one end of the stud 844 away from the driven bevel gear 843. A slider 8451 is fixed to the upper end of the threaded sleeve 845. The slider 8451 is slidably connected to the inner wall of the accommodating space 72. The end of the threaded sleeve 845 away from the stud 844 is connected to the center of one side of the adjacent driving plate 821. When the driving motor 841 rotates, it drives the active bevel gear 842 to rotate, and the rotation of the active bevel gear 842 drives the two driven bevel gears 843 to rotate. The rotation of the two driven bevel gears 843 drives the corresponding studs 844 to rotate respectively, and the rotation of the studs 844 drives the threaded sleeve 845 to move along the length direction of the vibration table 7, so that the purpose of driving the driving plates 821 to move towards each other or away from each other is achieved through one driving source, and then the purpose of driving the four limit angles 81 to shrink inward and expand outward is achieved through one driving source, which saves the number of driving sources installed, improves energy efficiency, and ensures the synchronization rate of the movement of the four limit angles 81, so that the four limit angles 81 are clamped in place at the same time.

[0049] Reference Figure 5 and Figure 7 In order to reduce the possibility of dust on the driving assembly 84 and extend the service life of the driving assembly 84, a dust cover 721 is installed in the accommodating space 72. The driving motor 841, the active bevel gear 842, the driven bevel gear 843 and are all located in the dust cover 721. The dust cover 721 is provided with an escape hole 7211 for the threaded sleeve 845 to pass through, and a part of the threaded sleeve 845 is always located in the dust cover 721 during the movement process.

[0050] Reference Figure 5 , the bottom wall of the accommodating space 72 is inclined, a certain distance is left between the bottom wall of the driving plate 821 and the bottom wall of the accommodating space 72, and a dust cleaning port 74 connected to the accommodating space 72 is provided on one side of the vibration table 7, and the dust cleaning port 74 is provided at the inclined lower end of the bottom wall of the accommodating space 72, and the lower end of the dust cleaning port 74 is not higher than the inclined lower end of the bottom wall of the accommodating space 72. In this way, the dust generated in the production workshop enters the accommodating space 72 through the diagonal guide groove 73, slides down along the bottom wall of the accommodating space 72, and is finally discharged from the dust cleaning port 74, reducing the possibility of dust accumulation in the accommodating space 72 and ensuring that the driving plate 821 can move smoothly.

[0051] The implementation principle of a lost foam casting production line in the embodiment of the present application is as follows: when used for the first time, the sand box is placed on the molding conveyor line 1, and the sand box is turned over when it reaches the box turning station 11, and the remaining sand in the sand box is dumped out; then, when it reaches the bottom sand station 12, the bottom sand is filled and vibrated, and when it passes through the loading station 13, the mold is manually loaded, and the lost foam model is placed above the bottom sand; then, it passes through the sand filling station 14 and the surface sand station 15 in sequence to fill and mold the molding sand, and add and arrange the surface sand, so as to complete the sand box molding; the sand box after molding is completed The second transfer trolley 41 moves on the second conveying track 4, and the second pushing piece 411 can push the sand box to the pouring conveyor line 2. The pouring process is completed when the sand box passes through the pouring station 21. After the pouring, the sand box continues to move along the pouring conveyor line 2 and is cooled until it reaches the first conveying track 3. It is then taken over by the first transfer trolley 31 and transferred to one side of the molding conveyor line 1. After the sand box is pushed to the molding conveyor line 1 by the first pushing piece 32, it is moved to the box turning station 11 for turning over, and the molding sand and castings in the sand box are poured out.

[0052] By providing a plurality of pouring conveyor belts and a plurality of pouring stations 21, a plurality of sand boxes can be poured at the same time, which is helpful to save pouring time, thereby improving the overall production efficiency of the casting production line.

[0053] When the sand box passes through the box turning station 11, the box turning machine 111 turns the sand box over, and pours the molding sand and castings in the sand box into the vibrating sand falling machine 112. The vibrating sand falling machine 112 breaks the sand clumps and separates the molding sand and the castings. The separated molding sand enters the molding sand recovery mechanism 5 through the molding sand discharge end to realize the recycling of the molding sand, and the castings enter the casting conveying device 113 through the casting discharge end to realize the transportation of the castings, thereby realizing the automatic collection of castings and the recycling of molding sand.

[0054] When the sand box to be vibrated moves toward the vibrating table 7, the four limiting angles 81 are in a scattered state, and the distance between two adjacent limiting angles 81 is large, so that the sand box to be vibrated can pass between the two limiting angles 81; when the sand box moves to the center of the vibrating table 7, the driving mechanism 82 is started, driving the four limiting angles 81 to move inward at the same time, until the limiting angles 81 abut against the bottom corners of the adjacent corresponding sand box, so as to limit the sand box. Subsequently, the hoist 61 lifts the molding sand output by the scraper distributor 54 to the discharge bin 62, and the discharge bin 62 injects molding sand into the sand box. When the sand box completes the injection of the corresponding molding sand, the clamping mechanism 71 clamps the sand box, and the vibrating table 7 vibrates the molding sand in the sand box. Through the combined action of the limiting mechanism 8 and the clamping mechanism 71, the possibility of relative displacement between the sand box and the vibrating table 7 during vibration is reduced. After the compaction is completed, the driving mechanism 82 drives the four limit angles 81 to disperse outward at the same time, and at the same time, the lifting drive member 715 drives the lifting rod 714 to descend, and then drives the clamping block 713 to move upward through the connecting rod 712, thereby releasing the limit on the bottom of the sand box and the downward pressure on the top, facilitating the intermittent movement of the sand box on the molding conveyor line 1, and also facilitating the next sand box to be compacted to move to the compaction table 7 through the limit angle 81.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lost foam casting production line, characterized in that: The invention comprises a molding conveyor line (1) and a plurality of pouring conveyor lines (2) arranged side by side, wherein one end of the molding conveyor line (1) and the plurality of pouring conveyor lines (2) is provided with a same first conveying track (3), and the other end is provided with a same second conveying track (4), a first transfer trolley (31) is slidably arranged on the first conveying track (3) along its length direction, a second transfer trolley (41) is slidably arranged on the second conveying track (4) along its length direction, and box turning stations (11) are sequentially arranged on the molding conveyor line (1) , a bottom sand station (12), a loading station (13), a sand filling station (14) and a surface sand station (15); a pouring station (21) is provided on the pouring conveyor line (2); a first pushing member (32) for pushing the sand box from the first transfer trolley (31) to the molding conveyor line (1) is provided on the side of the first conveying track (3) away from the molding conveyor line (1); and a second pushing member (411) for pushing the sand box from the second transfer trolley (41) to the pouring conveyor line (2) is provided on the second transfer trolley (41).

2. The lost foam casting production line according to claim 1, characterized in that: The box turning station (11) is provided with a box turning machine (111), and a vibrating sand shaking machine (112) is provided on a side of the box turning machine (111) away from the pouring conveying line (2) for receiving the molding sand and castings dumped when the sand box is turned over, the molding sand discharge end of the vibrating sand shaking machine (112) is connected to a molding sand recovery mechanism (5), and the casting discharge end of the vibrating sand shaking machine (112) is provided with a casting conveying device (113).

3. The lost foam casting production line according to claim 2, characterized in that: The molding sand recovery mechanism (5) comprises a vibrating screen (51), a water-cooling fan (52), a cooling bed (53) and a scraper distributor (54) which are arranged in sequence. The input end of the vibrating screen (51) is connected to the molding sand discharge end of the vibrating sand shakeout machine (112). The output end of the scraper distributor (54) is provided with a molding sand lifting mechanism (6) for providing the required molding sand to the bottom sand station (12), the filling sand station (14) and the surface sand station (15).

4. The lost foam casting production line according to claim 3, characterized in that: A vibrating table (7) is provided at the bottom sand station (12) and the sand filling station (14); the molding sand lifting mechanism (6) comprises a hoist (61) and a discharge bin (62); the input end of the hoist (61) is connected to the output end of the scraper distributor (54); the input end of the discharge bin (62) is connected to the output end of the hoist (61); the output end of the discharge bin (62) is arranged directly above the vibrating table (7); and a clamping mechanism (71) for clamping the sand box is provided on the vibrating table (7).

5. The lost foam casting production line according to claim 4, characterized in that: The clamping mechanism (71) comprises a fixing frame (711) arranged on the side wall of the vibration table (7) and a connecting rod (712) arranged on the fixing frame (711); the connecting rod (712) is rotatably connected to the fixing frame (711); a clamping block (713) is arranged on the lower side of one end of the connecting rod (712) close to the vibration table (7); a lifting rod (714) is arranged on the lower side of one end of the connecting rod (712) away from the pressing block (713); and a lifting driving member (715) for driving the lifting rod (714) to move up and down is arranged on the fixing frame (711).

6. The lost foam casting production line according to claim 4, characterized in that: A limiting mechanism (8) for limiting the bottom of the sand box is provided on the table surface of the vibration table (7), the limiting mechanism (8) comprising four limiting angles (81) adapted to the corner ends of the sand box, and a driving mechanism (82) for driving the four limiting angles (81) to simultaneously retract inward or expand outward.

7. The lost foam casting production line according to claim 6, characterized in that: The driving mechanism (82) comprises two symmetrically arranged driving plates (821), the driving plates (821) being arranged along the width direction of the vibration table (7), the driving plates (821) being slidably arranged inside the vibration table (7) along the length direction of the vibration table (7), the vibration table (7) being provided with a receiving space (72) for receiving the driving plates (821), the table surface of the vibration table (7) being provided with a diagonal guide groove (73) arranged corresponding to the limiting angle (81), the diagonal guide groove (73) and the receiving space (72) being rotatable. The diagonal guide groove (73) is connected to the drive plate (821), a moving rod (83) is passed through the diagonal guide groove (73), the bottom end of the moving rod (83) is slidably connected to the corresponding drive plate (821) along the length direction of the drive plate (821), the top end of the moving rod (83) is fixed to the bottom center of the corresponding limit angle (81), the length direction of the diagonal guide groove (73) is the same as the direction of the diagonal connection of the four limit angles (81), and a driving component (84) for driving the drive plates (821) to move towards each other or away from each other is provided in the accommodating space (72).

8. The lost foam casting production line according to claim 7, characterized in that: The driving assembly (84) comprises a driving motor (841) and a driving bevel gear (842) which are arranged in the accommodating space (72); the output ends of the driving bevel gear (842) and the driving motor (841) are coaxially fixed; the driving bevel gear (842) is simultaneously meshed with two oppositely arranged driven bevel gears (843); a stud (844) is coaxially fixed to the large end of the driven bevel gear (843); the stud (844) is rotatably arranged in the accommodating space (72) along the length direction of the vibration table (7); an end of the stud (844) away from the driven bevel gear (843) is threadedly connected to a threaded sleeve (845); a slider (8451) is provided on the threaded sleeve (845); the slider (8451) is slidably connected to the inner wall of the accommodating space (72); and an end of the threaded sleeve (845) away from the stud (844) is connected to the center of one side of an adjacent driving plate (821).

9. The lost foam casting production line according to claim 7, characterized in that: The bottom wall of the accommodating space (72) is arranged at an angle, a certain distance is left between the bottom wall of the driving plate (821) and the bottom wall of the accommodating space (72), a cleaning port (74) is provided on one side of the vibration platform (7), the cleaning port (74) is arranged at the inclined lower end of the bottom wall of the accommodating space (72), and the lower end of the cleaning port (74) is not higher than the inclined lower end of the bottom wall of the accommodating space (72).

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