Sand box upward pressing device for sand mold casting pouring and construction method

Abstract

The invention discloses a sand box upward pressing device for sand mold casting pouring and a construction method.The sand box upward pressing device comprises a support, a displacement frame and an air cylinder, the top of the support is slidably connected with the displacement frame through a first power mechanism, the air cylinder is arranged below the middle of the displacement frame, and a push rod at the lower end of the air cylinder is connected with a supporting plate; a clamping claw is connected to the lower portion of the supporting plate through a second power mechanism, a construction platform is arranged below the clamping claw, a sand box is arranged on the construction platform, and a supporting plate is arranged on the inner side of the construction platform. Transfer of the box pressing iron can be achieved, the supports are arranged on the periphery of the bottom of the box pressing iron, a gap channel is formed between the bottom of the box pressing iron and the sand box, the exhaust effect of molding sand is guaranteed, and the air hole defect of a casting is reduced; and by arranging the multiple pouring gate positions on the box iron, a worker can freely select a proper pouring gate for pouring, so that the working efficiency is improved, the product quality is ensured, and the mold is easy to popularize.

Description

Technical Field

[0001] The invention relates to a pressing block and a pressing block transporting mechanism, in particular to a sand box upper pressing device for sand casting and a construction method, belonging to the technical field of sand casting. Background Art

[0002] The box press iron is a special iron block pressed on the sand box to prevent the buoyancy of the molten metal from lifting the upper box when castings are poured, causing the castings to escape fire and expand. When in use, the existing iron press is directly placed on the upper model of the sand box by manual transportation, but this method has the following defects: ①, it is time-consuming and labor-intensive to carry the press block back and forth manually, and there is also a safety hazard of scalding; ②, the existing press block is directly in contact with the sand mold, which is not conducive to the exhaust of the casting; if a cushion block is placed between the press block and the sand mold before the press block is placed, the process becomes cumbersome and complicated, thereby reducing work efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a sand box upper pressure device and a construction method for sand casting. By arranging supports around the bottom of the pressure box iron, an exhaust channel is formed between the pressure box iron and the sand box, which is beneficial to the exhaust and heat dissipation of the casting and improves the work efficiency.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A sand box upper pressure device for sand casting, comprising a bracket, a displacement frame and a cylinder, wherein there are two brackets, the top of the bracket is slidably connected to the displacement frame through a first power mechanism, a cylinder is arranged below the middle of the displacement frame, a push rod at the lower end of the cylinder is connected to a support plate, a clamping claw is connected below the support plate through a second power mechanism, a limiting groove is arranged on the inner wall of the bottom end of the clamping claw, a construction platform is arranged below the clamping claw, a sand box is arranged on the construction platform, and a box press iron is arranged above the sand box.

[0005] Supports are arranged around the bottom of the press box iron, and a limiting block is arranged on the outer wall of the support. The upper end of the limiting block is fixed on the support, and the lower end of the limiting block extends out of the support. Exhaust holes are arranged on the top of the press box iron, and there are five exhaust holes. Pouring positions are arranged on the inner side of the press box iron, and there are three pouring positions. Limiting columns are arranged on the outer walls on both sides of the press box iron, and the positions of the limiting columns correspond to the positions of the limiting grooves.

[0006] A support plate is arranged on one side of the inner side of the construction platform, and there are two support plates. A support leg is arranged at the bottom of each support plate, and limit frames are arranged on both sides of the top of the support plate.

[0007] The first power mechanism is composed of a first gear, a second gear, a chain and a motor. One end of the top of the bracket is rotatably connected to the first rotating shaft through a support, and the other end of the top of the bracket is rotatably connected to the second rotating shaft through a support. A motor is arranged on the outside of the support, and the rotating shaft of the motor is fixedly connected to the second rotating shaft. First gears are arranged at both ends of the first rotating shaft, and second gears are arranged at both ends of the second rotating shaft. A matching chain is arranged between the corresponding first gear and second gear, and a displacement frame is fixedly connected to the top of the chain.

[0008] The second power mechanism consists of a first lead screw, a second lead screw, a first motor and a second motor, and the first support block and the second support block are respectively arranged at the two ends of the left side and the right side of the bottom of the support plate, and a third support block is arranged between the first support block and the second support block on the left side of the bottom of the support plate, and the first lead screw is rotatably connected between the third support block and the first support block on this side, and the second lead screw is rotatably connected between the third support block and the second support block on this side, a displacement rod is connected between the first support block and the second support block on the right side of the bottom of the support plate, a first displacement rod is arranged between the second lead screw and the displacement rod, a second displacement rod is arranged between the first lead screw and the displacement rod, and clamping claws are respectively arranged at the two ends of the first displacement rod and the second displacement rod, and the first motor is arranged outside the second support block on the left side of the bottom of the support plate, and the second motor is arranged outside the first support block on the left side of the bottom of the support plate.

[0009] The left end of the first displacement rod is connected to the second lead screw via a thread, the left end of the second displacement rod is connected to the first lead screw via a thread, and the right ends of the first displacement rod and the second displacement rod are respectively slidably connected to the displacement rods.

[0010] The construction method of the sand box upper pressure device for sand casting comprises the following steps: S1. Place the box iron required for construction between the two support plates; S2. After the casting sand box is made, the sand box mold is moved to the construction platform; S3, start the motor to move the support plate to the top of the box press; S4, start the first motor and the second motor to move the four clamping claws to the outermost end of the displacement rod, and then start the cylinder to lower the support plate to the surrounding of the box press iron so that the position of the limit groove corresponds to the position of the limit column; S5, starting the first motor and the second motor again, so that the limiting groove of the clamping claw is clamped on the outside of the limiting column; S6, start the cylinder to pick up the box press iron, and under the action of the motor, the box press iron is located just above the sand box; S7, start the cylinder to lower the box press iron onto the sand box, then use the first motor and the second motor to make the clamping claw leave the box press iron, and reset it through the cylinder and the motor.

[0011] The positive beneficial effects of the present invention are: 1. The present invention arranges a first power mechanism on the top of the bracket, so as to translate the box press iron on the support plate to above the sand box, thereby eliminating the inconvenience caused by manual handling, improving work efficiency and ensuring construction safety.

[0012] 2. The present invention provides a limit column on the outside of the box-pressing iron and a limit groove on the inner wall of the corresponding clamping claw to avoid the potential safety hazard of the box-pressing iron falling during transportation, thereby ensuring the safety and stability of the transportation process.

[0013] 3. The present invention arranges a second power mechanism at the bottom of the support plate, and under the action of the first motor and the second motor, the press box iron can be clamped and loosened, providing a guarantee for the transportation of the press box iron.

[0014] 4. The present invention forms a gap channel between the bottom of the press box iron and the sand box by arranging supporting legs around the bottom of the press box iron, which is beneficial to the exhaust and heat dissipation of the casting. At the same time, it saves the tedious steps of placing the cushion block, shortens the construction period and improves the production efficiency.

[0015] 5. The present invention sets multiple gate positions on the press box iron, so that the staff can select the appropriate gate for pouring according to different castings. It is flexible to use and easy to operate. By setting multiple exhaust positions, the exhaust effect of the molding sand is guaranteed and the occurrence of porosity defects in the castings is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the first power mechanism of the present invention; Figure 3 It is a structural schematic diagram of the support plate of the present invention; Figure 4 is a schematic structural diagram of the second power mechanism of the present invention; Figure 5 It is a structural schematic diagram of the box press iron of the present invention; Among them: 1- bracket, 2- support, 3- first gear, 4- first rotating shaft, 5- second gear, 6- second rotating shaft, 7- chain, 8- motor, 9- displacement frame, 10- cylinder, 11- support plate, 12- clamping claw, 13- limiting groove, 14- support plate, 15- limiting frame, 16- supporting leg, 17- construction platform, 18- sand box, 19- press box iron, 191- support, 192- pouring position, 193- exhaust hole, 194- limiting block, 195- limiting column, 201- first support block, 202- second support block, 203- third support block, 211- first lead screw, 212- second lead screw, 213- displacement rod, 221- first displacement rod, 222- second displacement rod, 231- first motor, 232- second motor. DETAILED DESCRIPTION

[0017] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings: Example 1, see Figure 1-Figure 5 A sand box upper pressure device for sand casting, comprising a bracket 1, a displacement frame 9 and a cylinder 10, wherein there are two brackets 1, the top of the bracket 1 is slidably connected with the displacement frame 9 through a first power mechanism, a cylinder 10 is arranged below the middle of the displacement frame 9, a push rod at the lower end of the cylinder 10 is connected with a support plate 11, a clamping claw 12 is connected below the support plate 11 through a second power mechanism, a limiting groove 13 is arranged on the inner wall of the bottom end of the clamping claw 12, a construction platform 17 is arranged below the clamping claw 12, a sand box 18 is arranged on the construction platform 17, and a box pressing iron 9 is arranged above the sand box 18.

[0018] Supports 191 are arranged around the bottom of the press box iron 9, and limit blocks 194 are arranged on the outer wall of the support 191. The upper end of the limit block 194 is fixed on the support 191, and the lower end of the limit block 194 extends out of the support 191. Exhaust holes 193 are arranged on the top of the press box iron 9, and there are five exhaust holes 193. Pouring positions 192 are arranged on the inner side of the press box iron 9, and there are three pouring positions 192.

[0019] Limiting columns 195 are arranged on the outer walls of both sides of the box pressing iron 9 , and the positions of the limiting columns 195 correspond to the positions of the limiting grooves 13 .

[0020] A support plate 14 is arranged on one side of the inner side of the construction platform 17 . There are two support plates 14 . A support leg 16 is arranged at the bottom of each support plate 14 . Limiting frames 15 are arranged on both sides of the top of the support plate 14 .

[0021] The first power mechanism consists of a first gear 3, a second gear 5, a chain 7 and a motor 8. One end of the top of the bracket 1 is rotatably connected to the first rotating shaft 4 through the support 2, and the other end of the top of the bracket 1 is rotatably connected to the second rotating shaft 6 through the support 2. A motor 8 is arranged outside the support 2, and the rotating shaft of the motor 8 is fixedly connected to the second rotating shaft 6. First gears 3 are arranged at both ends of the first rotating shaft 4, and second gears 5 are arranged at both ends of the second rotating shaft 6. A matching chain 7 is arranged between the corresponding first gear 3 and the second gear 5, and a displacement frame 9 is fixedly connected to the top of the chain 7.

[0022] The second power mechanism is composed of a first lead screw 211, a second lead screw 212, a first motor 231 and a second motor 232. The first support block 201 and the second support block 202 are respectively arranged at the two ends of the left side and the right side of the bottom of the support plate 11. A third support block 203 is arranged between the first support block 201 and the second support block 202 on the left side of the bottom of the support plate 11. The first lead screw 211 is connected between the third support block 203 and the first support block 201 on this side. The second lead screw 212 is rotatably connected between the third support block 203 and the second support block 202 on this side. A displacement rod 213 is rotatably connected between the first support block 201 and the second support block 202 on the right side of the bottom of the support plate 11, a first displacement rod 221 is arranged between the second lead screw 212 and the displacement rod 213, a second displacement rod 222 is arranged between the first lead screw 211 and the displacement rod 213, clamping claws 12 are arranged at both ends of the first displacement rod 221 and the second displacement rod 222, a first motor 231 is arranged outside the second support block 202 on the left side of the bottom of the support plate 11, and a second motor 232 is arranged outside the first support block 201 on the left side of the bottom of the support plate 11.

[0023] The left end of the first displacement rod 221 is connected to the second lead screw 212 via a thread, the left end of the second displacement rod 222 is connected to the first lead screw 211 via a thread, and the right ends of the first displacement rod 221 and the second displacement rod 222 are slidably connected to the displacement rod 213 respectively.

[0024] In the above description, the cross section formed by the support legs at the bottom of the press box iron is consistent with the cross section of the upper sand box of the sand box.

[0025] In the above description, there are four limiting columns, and the positions of the four limiting columns correspond to the positions of the limiting grooves on the inner wall of the clamping claw.

[0026] In the above description, the first motor drives the second lead screw to rotate, and the second lead screw drives the first displacement rod to move; the second motor drives the first lead screw to rotate, and the first lead screw drives the second displacement rod to move.

[0027] In the above description, there are at least four limit blocks, and the upper part of each limit block is fixed on the outer wall of the iron box support, and the lower end of the limit block extends out of the support. When the iron box is placed on the sand box, the lower end of the limit block is located at the outer wall of the sand box.

[0028] In the above description, first displacement sleeves are respectively provided at the bottom of both ends of the second displacement rod. The first displacement sleeve at the left end is connected with the first lead screw, and the first displacement sleeve at the right end is slidably connected with the displacement rod. That is to say, under the action of the first motor, the second displacement rod can be translated.

[0029] In the above description, second displacement sleeves are arranged at the bottom of both ends of the first displacement rod. The displacement sleeve on the left side is connected with the second lead screw, and the second displacement sleeve on the right end is slidably connected with the displacement rod. That is to say, under the action of the second motor, the first displacement rod can be translated.

[0030] In the above description, when the first motor and the second motor are started at the same time, the clamping claws can clamp the press box iron, so as to facilitate clamping and fixing the press box iron.

[0031] In the above description, there are at least four limit blocks, which are evenly distributed outside the support.

[0032] Embodiment 2, the construction method of the sand casting pouring sand box upper pressure device described above, comprises the following steps: S1. Place the box iron 19 required for construction between the two support plates 14; S2, after the casting sand box is made, the sand box mold is moved to the construction platform 17; S3, start the motor 8 to move the support plate 11 to the top of the box press iron 19; S4, start the first motor 231 and the second motor 232 to move the four clamping claws 12 to the outermost end of the displacement rod 213, and then start the cylinder 10 to lower the support plate 11 to the surrounding of the box press iron 19 so that the position of the limit groove 13 corresponds to the position of the limit column 195; S5, start the first motor 231 and the second motor 232 again, so that the limiting groove 13 of the clamping claw 12 is clamped outside the limiting column 195; S6, start the cylinder 10 to pick up the box press iron 19, and under the action of the motor 8, the box press iron 19 is located directly above the sand box 18; S7, start the cylinder 10 to lower the box press iron 19 onto the sand box 18, then use the first motor 231 and the second motor 232 to make the clamping claw 12 leave the box press iron 19, and reset it through the cylinder 10 and the motor 8.

[0033] In the above description, the positions of the two support plates and the construction platform satisfy the following requirements: the press box iron can be translated from the support plate to the construction platform through the horizontal movement of the clamping claws under the support plate, and the press box iron on the construction platform can also be moved from the support plate to the support plate.

[0034] In the above description, the distance between the two support plates can meet the requirement of placing the box press iron stably.

[0035] In the above description, the function of the first power mechanism is to translate the displacement frame; the function of the second power mechanism is to retract or release the clamping claws.

[0036] The present invention can realize the translation of the press box iron by arranging the first power mechanism, and can clamp and fix the press box iron by arranging the second power mechanism, so as to ensure the safety and stability of the transportation process; by arranging supports around the bottom of the press box iron, a gap channel is formed between the bottom of the press box iron and the sand box, which is beneficial to the exhaust and heat dissipation of the casting; by arranging multiple gate positions on the press box iron, the staff can select the appropriate gate for pouring according to different castings; by arranging multiple exhaust positions, the exhaust effect of the molding sand is guaranteed, the occurrence of air hole defects in the casting is reduced, the work efficiency is improved, and it is easy to promote.

Claims

1. A sand box pressing device for sand casting, comprising a bracket (1), a displacement frame (9) and a cylinder (10), characterized in that: There are two brackets (1), the top of the bracket (1) is slidably connected to a displacement frame (9) through a first power mechanism, a cylinder (10) is arranged below the middle of the displacement frame (9), a push rod at the lower end of the cylinder (10) is connected to a support plate (11), the support plate (11) is connected to a clamping claw (12) below through a second power mechanism, a limiting groove (13) is arranged on the inner wall of the bottom end of the clamping claw (12), a construction platform (17) is arranged below the clamping claw (12), a sand box (18) is arranged on the construction platform (17), and a box press iron (9) is arranged above the sand box (18).

2. A sand box pressing device for sand casting according to claim 1, characterized in that: Supports (191) are arranged around the bottom of the box-pressing iron (9), and a limit block (194) is arranged on the outer wall of the support (191). The upper end of the limit block (194) is fixed on the support (191), and the lower end of the limit block (194) extends out of the support (191). The top of the box-pressing iron (9) is provided with exhaust holes (193), and there are five exhaust holes (193). The inner side of the box-pressing iron (9) is provided with pouring positions (192), and there are three pouring positions (192).

3. The sand box pressing device for sand casting according to claim 1 is characterized in that: The outer walls of both sides of the press box iron (9) are provided with limiting columns (195), and the positions of the limiting columns (195) correspond to the positions of the limiting grooves (13).

4. The sand box pressing device for sand casting according to claim 1, characterized in that: A support plate (14) is arranged on one side of the inner side of the construction platform (17), wherein two support plates (14) are provided, and a support leg (16) is arranged at the bottom of each support plate (14), and limiting frames (15) are arranged on both sides of the top of the support plate (14).

5. The sand box pressing device for sand casting according to claim 1, characterized in that: The first power mechanism is composed of a first gear (3), a second gear (5), a chain (7) and a motor (8); one end of the top of the bracket (1) is rotatably connected to a first rotating shaft (4) via a support (2); the other end of the top of the bracket (1) is rotatably connected to a second rotating shaft (6) via a support (2); a motor (8) is arranged outside the support (2); the rotating shaft of the motor (8) is fixedly connected to the second rotating shaft (6); first gears (3) are arranged at both ends of the first rotating shaft (4); second gears (5) are arranged at both ends of the second rotating shaft (6); a matching chain (7) is arranged between the corresponding first gear (3) and second gear (5); and a displacement frame (9) is fixedly connected to the top of the chain (7).

6. The sand box pressing device for sand casting according to claim 1, characterized in that: The second power mechanism is composed of a first lead screw (211), a second lead screw (212), a first motor (231) and a second motor (232); the first support block (201) and the second support block (202) are respectively provided at two ends on the left side and the right side of the bottom of the support plate (11); a third support block (203) is provided between the first support block (201) and the second support block (202) on the left side of the bottom of the support plate (11); the first lead screw (211) is rotatably connected between the third support block (203) and the first support block (201) on the side; the second lead screw (212) is rotatably connected between the third support block (203) and the second support block (202) on the side; the support plate (11) is provided with a first lead screw (211) and a second lead screw (212) A displacement rod (213) is connected between the first support block (201) and the second support block (202) on the right side of the bottom of the plate (11); a first displacement rod (221) is arranged between the second lead screw (212) and the displacement rod (213); a second displacement rod (222) is arranged between the first lead screw (211) and the displacement rod (213); clamping claws (12) are arranged at both ends of the first displacement rod (221) and the second displacement rod (222), respectively; a first motor (231) is arranged outside the second support block (202) on the left side of the bottom of the support plate (11); and a second motor (232) is arranged outside the first support block (201) on the left side of the bottom of the support plate (11).

7. The sand box pressing device for sand casting according to claim 1, characterized in that: There are four clamping claws (12).

8. The sand box pressing device for sand casting according to claim 6, characterized in that: The left end of the first displacement rod (221) is connected to the second lead screw (212) via a thread, the left end of the second displacement rod (222) is connected to the first lead screw (211) via a thread, and the right ends of the first displacement rod (221) and the second displacement rod (222) are respectively slidably connected to the displacement rod (213).

9. The construction method of the sand box upper pressure device for sand casting according to any one of claims 1 to 8, characterized in that: The steps include: S1. Place the box-pressing iron (19) required for construction between two support plates (14); S2, after the casting sand box is made, the sand box mold is moved to the construction platform (17); S3, start the motor (8) to move the support plate (11) to the top of the box press iron (19); S4, starting the first motor (231) and the second motor (232) to move the four clamping claws (12) to the outermost ends of the displacement rod (213), and then starting the cylinder (10) to lower the support plate (11) to the periphery of the press box iron (19) so that the position of the limit groove (13) corresponds to the position of the limit column (195); S5, starting the first motor (231) and the second motor (232) again, so that the limiting groove (13) of the clamping claw (12) is clamped on the outside of the limiting column (195); S6, starting the cylinder (10) to pick up the box press iron (19), and under the action of the motor (8), the box press iron (19) is located directly above the sand box (18); S7, start the cylinder (10) to lower the box press iron (19) onto the sand box (18), then use the first motor (231) and the second motor (232) to make the clamping claw (12) leave the box press iron (19), and reset it through the cylinder (10) and the motor (8).

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