An auxiliary mold closing device for a sand mold

Abstract

The utility model discloses an auxiliary mold closing device of casting sand box relates to foundry technical field, including feeding conveyor and discharging conveyor, is equipped with the auxiliary mold closing mechanism between feeding conveyor and discharging conveyor, and the auxiliary mold closing mechanism includes the mounting bracket, and the top of mounting bracket is equipped with the transition conveyor, and the bottom fixed setting of transition conveyor has a plurality of groups first support seat. The utility model has the beneficial effect that in the mold closing process, through making the spacing post drop and the spacing seat separate and unlocking transition conveyor, make transition conveyor be able to occur the slight deviation under the joint action of first support seat, second support seat and support ball, thereby make sand box lower mould can carry out slight movement, therefore, even if the slight misregistration exists between sand box lower mould and sand box upper mould, sand box lower mould also can be guided under sand box upper mould and align with it, avoid the mold closing failure, thereby reduce the precision requirement to conveying device and turnover device, be favorable to reducing the production cost of device.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, and in particular to an auxiliary mold closing device for a casting sand box. Background Technology

[0002] Casting is a process in which metal is melted into a liquid that meets certain requirements and poured into a mold. After cooling and solidification, and cleaning, a casting with a predetermined shape, size, and properties is obtained. Sand casting, in particular, involves using molding sand to create a mold and then pouring the casting. Because sand casting molds are simple to manufacture, the molding sand used is widely available and inexpensive, and it is well adaptable to single-piece, batch, and mass production of castings, it has always been a basic process in casting production and is widely used.

[0003] In sand casting, the upper and lower sand molds are alternately positioned on a roller conveyor and transported by a molding machine. During this transport, the upper sand mold is rotated 180 degrees before the upper and lower molds are closed. This mold-closing method requires high positional accuracy between the upper and lower sand molds. Misalignment between the upper and lower molds during closure will lead to mold-closing failure. Therefore, the sand box conveying and rotating devices need to have high precision, resulting in high production costs. Utility Model Content

[0004] In order to overcome the above-mentioned defects in the prior art, this utility model provides an auxiliary mold closing device for a casting sand box.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an auxiliary mold closing device for a casting sand box, including a feeding conveyor and a discharging conveyor, an auxiliary mold closing mechanism is provided between the feeding conveyor and the discharging conveyor, the auxiliary mold closing mechanism includes a mounting frame, a transition conveyor is provided above the mounting frame, a number of first support seats are fixedly provided at the bottom of the transition conveyor, a number of second support seats are fixedly provided at the top of the mounting frame, each group of second support seats is provided in a one-to-one correspondence with the first support seats, an arc-shaped groove is opened on the adjacent surfaces of the first support seats and the second support seats, a support ball is fitted between the first support seats and the second support seats, a support frame is fixedly provided at the top of the mounting frame, a number of limiting mechanisms are provided on the support frame, the limiting mechanism includes a limiting post, the limiting post is movably mounted on the support frame, a limiting seat corresponding to the position of the limiting post is fixedly installed at the bottom of the transition conveyor, and a box-flipping mechanism is provided above the auxiliary mold closing mechanism.

[0006] Furthermore, the bottom surface of the transition conveyor is a rectangular structure, and support columns are fixedly installed at the center of the four bottom sides and near the four endpoints of the transition conveyor. The first support seat is fixedly installed at the bottom of the support column.

[0007] Furthermore, the number of limiting mechanisms is at least two sets, and the limiting mechanisms are evenly arranged on the support frame. The limiting mechanism also includes a lifting plate. The two ends of the lifting plate are fixedly installed with first guide rods, which are slidably installed on the support frame. The bottom of the support frame is fixedly installed with a first hydraulic cylinder, and the output end of the first hydraulic cylinder is fixedly connected to the lifting plate. The limiting post is fixedly installed on the top of the lifting plate, and the limiting seat is provided with a limiting hole that matches the limiting post.

[0008] Furthermore, the box-flipping mechanism includes a frame, a top frame fixedly installed on the top of the frame, a lifting frame that can be raised and lowered on the top frame, and gripping components symmetrically arranged on the lifting frame.

[0009] Furthermore, a second hydraulic cylinder is fixedly installed at the top center of the top frame, and the output end of the second hydraulic cylinder is fixedly connected to the lifting frame. A second guide rod is fixedly installed at the top of the lifting frame near the four endpoints, and the second guide rod is slidably installed on the top frame.

[0010] Furthermore, the gripping component includes a movable frame, with slides fixedly installed at both ends of the movable frame. A third guide rod is slidably installed on the slide, and the third guide rod is fixedly installed on the lifting frame. A third hydraulic cylinder is provided between the two sets of the third guide rods, and the third hydraulic cylinder is fixedly installed on the lifting frame. The conveying end of the third hydraulic cylinder is fixedly connected to the movable frame.

[0011] Furthermore, a fixed frame is fixedly installed at the bottom center of the movable frame, and a clamping plate is rotatably installed at the bottom end of the fixed frame. A swing cylinder for driving the clamping plate to rotate is installed on the fixed frame, and connecting columns are fixedly installed at both ends of the clamping plate. The two sets of connecting columns are symmetrically arranged.

[0012] Furthermore, the swing cylinder includes a swing cylinder, on which a drive shaft is rotatably mounted. The drive shaft is fixedly connected to the rotating shaft of the clamping plate. Piston cylinders are fixedly mounted at both ends of the swing cylinder. An oil inlet and outlet hole is provided at the end of the piston cylinder away from the swing cylinder. A piston rod is movably mounted inside the piston cylinder. A toothed part is provided in the middle of the piston rod. A transmission gear matching the toothed part is fixedly mounted on the side wall of the drive shaft.

[0013] Furthermore, the feeding conveyor, unloading conveyor, and transition conveyor are all roller conveyors. The upper and lower sand box molds are placed alternately on the feeding conveyor, and two sets of connecting sleeves are fixedly installed on the left and right side walls of the upper and lower sand box molds.

[0014] The beneficial effect of this utility model is that, during the mold closing process, by lowering the limiting column and separating it from the limiting seat to unlock the transition conveyor, the support ball can roll in the arc groove, allowing the transition conveyor to undergo a slight offset under the combined action of the first support seat, the second support seat, and the support ball. This allows the lower mold of the sand box to move slightly. Therefore, even if there is a slight misalignment between the lower mold and the upper mold of the sand box, the lower mold will be aligned with it under the guidance of the upper mold, avoiding mold closing failure. This reduces the precision requirements of the conveying device and the turning device, which is beneficial to reducing the production cost of the device. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction; Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 6 for Figure 4 A magnified view of a portion of region C in the middle; Figure 7 This is a schematic diagram of the internal structure of the swing cylinder of this utility model.

[0017] In the diagram: 1. Feeding conveyor, 2. Discharging conveyor, 3. Mounting frame, 4. Transition conveyor, 5. Support column, 6. First support seat, 7. Second support seat, 8. Arc groove, 9. Support ball, 10. Limiting column, 11. Limiting seat, 101. Limiting hole, 12. Lifting plate, 13. First guide rod, 14. First hydraulic cylinder, 15. Frame, 16. Top frame, 17. Lifting frame, 18. Second hydraulic cylinder, 19. Second guide rod, 20. Moving frame 21. Slide, 22. Third guide rod, 23. Support frame, 24. Third hydraulic cylinder, 25. Fixed frame, 26. Clamping plate, 27. Swing cylinder, 271. Swing cylinder, 272. Drive shaft, 273. Piston cylinder, 274. Oil inlet / outlet hole, 275. Piston rod, 276. Tooth, 277. Transmission gear, 28. Connecting column, 29. Upper mold of sand box, 291. Positioning column, 30. Lower mold of sand box, 301. Positioning hole, 31. Connecting sleeve. Detailed Implementation

[0018] To more clearly illustrate the technical solution of this utility model, the following description is made in conjunction with the accompanying drawings. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings and embodiments without creative effort, and all of them fall within the protection scope of this utility model.

[0019] according to Figure 1-7 As shown, an auxiliary mold-closing device for a casting sand box includes a feeding conveyor 1 and a discharging conveyor 2. An auxiliary mold-closing mechanism is provided between the feeding conveyor 1 and the discharging conveyor 2. The auxiliary mold-closing mechanism includes a mounting frame 3. A transition conveyor 4 is provided above the mounting frame 3. Several sets of first support seats 6 are fixedly installed at the bottom of the transition conveyor 4. The bottom surface of the transition conveyor 4 is a rectangular structure. Support columns 5 are fixedly installed at the center of the four bottom sides and near the four endpoints of the transition conveyor 4. The first support seats 6 are fixedly installed at the bottom of the support columns 5. Several sets of second support seats 7 are fixedly installed at the top of the mounting frame 3. The number of second support seats 7 is the same as the number of first support seats 6. Each set of second support seats 7 corresponds one-to-one with a first support seat 6. An arc-shaped groove 8 is provided on the adjacent surface of the first support 6 and the second support 7. A support ball 9 is installed between the first support 6 and the second support 7. A support frame 23 is fixedly installed on the top of the mounting frame 3. Several sets of limiting mechanisms are provided on the support frame 23. The limiting mechanism includes a limiting post 10. The limiting post 10 is installed on the support frame 23 in a liftable manner. A limiting seat 11 corresponding to the position of the limiting post 10 is fixedly installed at the bottom of the transition conveyor 4. A box-flipping mechanism is provided above the auxiliary mold closing mechanism. The feeding conveyor 1, the unloading conveyor 2 and the transition conveyor 4 are all roller conveyors. The upper sand box mold 29 and the lower sand box mold 30 are placed alternately on the feeding conveyor 1. Two sets of connecting sleeves 31 are fixedly installed on the left and right side walls of the upper sand box mold 29 and the lower sand box mold 30.

[0020] In the above specific embodiment, the upper sand box mold 29 and the lower sand box mold 30 are alternately conveyed to the transition conveyor 4 by the feeding conveyor 1. The upper sand box mold 29 is then grabbed and rotated 180 degrees by the flipping mechanism and installed onto the lower sand box mold 30, thereby completing the sand box mold closing operation. During the mold closing process, the transition conveyor 4 is unlocked by lowering the limiting post 10 and separating it from the limiting seat 11. At this time, the support ball 9 can roll in the arc groove 8, so that the transition conveyor 4 can undergo a slight offset under the combined action of the first support seat 6, the second support seat 7 and the support ball 9. This allows the lower sand box mold 30 to move slightly. Therefore, even if there is a slight misalignment between the lower sand box mold 30 and the upper sand box mold 29, the lower sand box mold 30 will be aligned with the upper sand box mold 29 under its guidance, avoiding mold closing failure. This reduces the precision requirements of the conveying device and the flipping device, which is beneficial to reducing the production cost of the device.

[0021] This embodiment provides an auxiliary mold-closing device for a casting sand box. During the transport of the sand box by the transition conveyor 4, to ensure the stability of the transition conveyor 4, the first hydraulic cylinder 14 drives the lifting plate 12 to rise, causing the limiting post 10 to insert into the limiting hole 101 of the limiting seat 11, thus limiting the transition conveyor 4 and preventing it from shifting due to external forces. This ensures that the transition conveyor 4 can be smoothly transported to the sand box. The specific technical solution is as follows: according to Figure 4 and Figure 6 As shown, the number of limiting mechanisms is at least two sets, and the limiting mechanisms are evenly arranged on the support frame 23. The limiting mechanism also includes a lifting plate 12. The two ends of the lifting plate 12 are fixedly installed with first guide rods 13. The first guide rods 13 are slidably installed on the support frame 23. The bottom of the support frame 23 is fixedly installed with a first hydraulic cylinder 14. The output end of the first hydraulic cylinder 14 is fixedly connected to the lifting plate 12. The limiting post 10 is fixedly installed on the top of the lifting plate 12. The limiting seat 11 is provided with a limiting hole 101 that matches the limiting post 10.

[0022] This embodiment provides an auxiliary mold-closing device for a casting sand box. During the box flipping process, the second hydraulic cylinder 18 drives the lifting frame 17 to descend, bringing the connecting column 28 and the connecting sleeve 31 to the same height. Then, the third hydraulic cylinder 24 drives the moving frame 20 to move closer together, allowing the connecting column 28 to be inserted into the connecting sleeve 31, thereby fixing the sand box. Afterward, the second hydraulic cylinder 18 drives the lifting frame 17 to rise, lifting the upper mold 29 of the sand box from the transition conveyor 4. Then, the two sets of swing cylinders 27 are started synchronously, and the same hydraulic system... The synchronous starting method of the swing cylinder 27 in the system is existing technology and will not be elaborated on here. The swing cylinder 27 drives the clamping plate 26 to rotate, causing the upper mold 29 of the sand box to rotate 180 degrees. Then, the second hydraulic cylinder 18 drives the lifting frame 17 to descend again, thereby completing the mold closing work of the sand box. After the mold closing is completed, the third hydraulic cylinder 24 and the second hydraulic cylinder 18 reset in sequence. After the connecting column 28 disengages from the connecting sleeve 31, the lifting frame 17 rises and resets to prepare for the subsequent mold closing work of the sand box. The specific technical solution is as follows: according to Figure 1-3 As shown, the box-flipping mechanism includes a frame 15, a top frame 16 fixedly installed on the top of the frame 15, a lifting frame 17 that can be raised and lowered on the top frame 16, gripping components symmetrically arranged on the lifting frame 17, a second hydraulic cylinder 18 fixedly installed at the middle of the top of the top of the top frame 16, the output end of the second hydraulic cylinder 18 being fixedly connected to the lifting frame 17, and a second guide rod 19 fixedly installed at the top of the lifting frame 17 near the four endpoints, the second guide rod 19 being slidably installed on the top frame 16.

[0023] according to Figure 3 and Figure 4 As shown, the gripping assembly includes a movable frame 20, with slide blocks 21 fixedly installed at both ends of the movable frame 20. A third guide rod 22 is slidably installed on the slide block 21. The third guide rod 22 is fixedly installed on the lifting frame 17. A third hydraulic cylinder 24 is provided between the two sets of third guide rods 22. The third hydraulic cylinder 24 is fixedly installed on the lifting frame 17. The conveying end of the third hydraulic cylinder 24 is fixedly connected to the movable frame 20. A fixed frame 25 is fixedly installed at the middle of the bottom end of the movable frame 20. A clamping plate 26 is rotatably installed at the bottom end of the fixed frame 25. A swing cylinder 27 for driving the clamping plate 26 to rotate is provided on the fixed frame 25. Connecting columns 28 are fixedly installed at both ends of the clamping plate 26. The two sets of connecting columns 28 are symmetrically arranged.

[0024] This embodiment provides an auxiliary mold-closing device for a casting sand box. When the sand box is driven to flip by the swing cylinder 27, hydraulic oil enters the piston cylinder 273 through the oil inlet / outlet hole 274, thereby driving the piston rod 275 to move within the piston cylinder 273. When the piston rod 275 moves, the engagement of the teeth 276 and the transmission gear 277 causes the drive shaft 272 to drive the clamping plate 26 to rotate, thereby realizing the flipping of the sand box. The specific technical solution is as follows: according to Figure 7 As shown, the swing cylinder 27 includes a swing cylinder 271, on which a drive shaft 272 is rotatably mounted. The drive shaft 272 is fixedly connected to the rotating shaft of the clamping plate 26. Piston cylinders 273 are fixedly mounted at both ends of the swing cylinder 271. An oil inlet / outlet hole 274 is provided at the end of the piston cylinder 273 away from the swing cylinder 271. A piston rod 275 is movably mounted inside the piston cylinder 273. A toothed portion 276 is provided in the middle of the piston rod 275. A transmission gear 277 matching the toothed portion 276 is fixedly mounted on the side wall of the drive shaft 272.

[0025] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. An auxiliary mold-closing device for a casting sand box, comprising a feeding conveyor (1) and a discharging conveyor (2), characterized in that: An auxiliary mold-closing mechanism is provided between the feeding conveyor (1) and the unloading conveyor (2). The auxiliary mold-closing mechanism includes a mounting frame (3). A transition conveyor (4) is provided above the mounting frame (3). Several sets of first support seats (6) are fixedly installed at the bottom of the transition conveyor (4). Several sets of second support seats (7) are fixedly installed at the top of the mounting frame (3). Each set of second support seats (7) corresponds one-to-one with the first support seats (6). An arc is opened on the adjacent surface of the first support seats (6) and the second support seats (7). The first support base (6) and the second support base (7) are fitted with a support ball (9). The top of the mounting frame (3) is fixedly installed with a support frame (23). The support frame (23) is provided with several sets of limiting mechanisms. The limiting mechanism includes a limiting column (10). The limiting column (10) is installed on the support frame (23) in a liftable manner. The bottom of the transition conveyor (4) is fixedly installed with a limiting seat (11) corresponding to the position of the limiting column (10). The upper part of the auxiliary mold closing mechanism is provided with a box-flipping mechanism.

2. The auxiliary mold-closing device for a casting sand box according to claim 1, characterized in that, The bottom surface of the transition conveyor (4) is a rectangular structure. Support columns (5) are fixedly installed at the center of the four bottom sides and near the four endpoints of the transition conveyor (4). The first support seat (6) is fixedly installed at the bottom of the support column (5).

3. The auxiliary mold-closing device for a casting sand box according to claim 1, characterized in that, The number of limiting mechanisms is at least two sets. The limiting mechanisms are evenly arranged on the support frame (23). The limiting mechanism also includes a lifting plate (12). The two ends of the lifting plate (12) are fixedly installed with first guide rods (13). The first guide rods (13) are slidably installed on the support frame (23). The bottom of the support frame (23) is fixedly installed with a first hydraulic cylinder (14). The output end of the first hydraulic cylinder (14) is fixedly connected to the lifting plate (12). The limiting post (10) is fixedly installed on the top of the lifting plate (12). The limiting seat (11) is provided with a limiting hole (101) that matches the limiting post (10).

4. The auxiliary mold-closing device for a casting sand box according to claim 1, characterized in that, The box-flipping mechanism includes a frame (15), a top frame (16) is fixedly installed on the top of the frame (15), a lifting frame (17) is installed on the top frame (16) and a gripping component is symmetrically arranged on the lifting frame (17).

5. The auxiliary mold-closing device for a casting sand box according to claim 4, characterized in that, A second hydraulic cylinder (18) is fixedly installed at the top center of the top frame (16). The output end of the second hydraulic cylinder (18) is fixedly connected to the lifting frame (17). A second guide rod (19) is fixedly installed at the top of the lifting frame (17) near the four ends. The second guide rod (19) is slidably installed on the top frame (16).

6. The auxiliary mold-closing device for a casting sand box according to claim 4, characterized in that, The gripping assembly includes a movable frame (20), with slides (21) fixedly installed at both ends of the movable frame (20). A third guide rod (22) is slidably installed on the slide (21). The third guide rod (22) is fixedly installed on the lifting frame (17). A third hydraulic cylinder (24) is provided between the two sets of the third guide rods (22). The third hydraulic cylinder (24) is fixedly installed on the lifting frame (17), and the conveying end of the third hydraulic cylinder (24) is fixedly connected to the movable frame (20).

7. The auxiliary mold-closing device for a casting sand box according to claim 6, characterized in that, A fixed frame (25) is fixedly installed at the bottom center of the movable frame (20). A clamping plate (26) is rotatably installed at the bottom of the fixed frame (25). A swing cylinder (27) for driving the clamping plate (26) to rotate is installed on the fixed frame (25). Connecting columns (28) are fixedly installed at both ends of the clamping plate (26). The two sets of connecting columns (28) are symmetrically arranged.

8. The auxiliary mold-closing device for a casting sand box according to claim 7, characterized in that, The swing cylinder (27) includes a swing cylinder (271), on which a drive shaft (272) is rotatably mounted. The drive shaft (272) is fixedly connected to the rotating shaft of the clamping plate (26). Piston cylinders (273) are fixedly mounted at both ends of the swing cylinder (271). An oil inlet / outlet hole (274) is provided at one end of the piston cylinder (273) away from the swing cylinder (271). A piston rod (275) is movably mounted inside the piston cylinder (273). A toothed part (276) is provided in the middle of the piston rod (275). A transmission gear (277) matching the toothed part (276) is fixedly mounted on the side wall of the drive shaft (272).

9. The auxiliary mold-closing device for a casting sand box according to claim 1, characterized in that, The feeding conveyor (1), unloading conveyor (2) and transition conveyor (4) are all roller conveyors. The feeding conveyor (1) has an upper sand box mold (29) and a lower sand box mold (30) placed alternately. Two sets of connecting sleeves (31) will be fixedly installed on the left and right side walls of the upper sand box mold (29) and the lower sand box mold (30).

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