A system for casting automobile brake drums

Abstract

The present application relates to the technical field of automobile brake drum casting, and particularly relates to an automobile brake drum pouring system, which aims at the problems of too fast flow speed of molten iron and inconvenient treatment of water vapor in the heat dissipation process in the automobile brake drum pouring system in the prior art, and proposes the following scheme, which comprises a pouring mechanism, a placing mechanism and a cooling mechanism, wherein the pouring mechanism comprises a straight sprue, a cross sprue fixed at the bottom of the straight sprue, two connecting blocks installed on the cross sprue, two ends of each of the two connecting blocks are fixed with a sub sprue, and the sub sprue is connected with a brake drum casting through two inner sprues; the placing mechanism comprises a base, a rotating shaft rotatably connected to the top of the base, and a plurality of placing plates fixed on the outer periphery of the rotating shaft; and the cooling mechanism comprises a cooling mechanism body, a cooling mechanism body fixed on the top of the base, and a plurality of cooling pipes fixed on the outer periphery of the cooling mechanism body. The present application can not only effectively prevent the erosion of the flow speed of molten iron on the cavity wall of the casting, thereby reducing the sand hole defects of the brake drum, but also conveniently cool the products after pouring, and effectively recycle the water vapor generated in the cooling process.

Description

Technical Field

[0001] This invention relates to the field of automotive brake drum casting, and more particularly to an automotive brake drum casting system. Background Technology

[0002] During the manufacturing process of automotive brake drums, molten metal is typically poured into a brake drum molding mold and then cooled and solidified. The speed at which the molten iron flows in the casting cavity directly affects the quality of the product.

[0003] Existing automotive brake drum casting systems have a relatively simple structure, mainly consisting of a sprue and a gating system. This results in excessively fast flow rates of molten iron within the casting cavity after pouring, which can easily lead to sand hole defects in the brake drum. Furthermore, after pouring, the casting mechanism needs to be cooled before the finished product can be removed. Natural cooling takes a considerable amount of time, while water spraying generates excessive water vapor, which can easily burn workers and waste a lot of water. Therefore, this solution proposes an automotive brake drum casting system. Summary of the Invention

[0004] The present invention proposes an automotive brake drum casting system that solves the problems of excessively fast molten iron flow rate and inconvenient handling of water vapor during heat dissipation in the existing automotive brake drum casting system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automotive brake drum casting system, comprising:

[0007] The casting mechanism includes a sprue, a horizontal sprue fixed at the bottom of the sprue, and two connecting blocks installed on the horizontal sprue. Both ends of the two connecting blocks are fixed with a gating channel, and one side of the gating channel is connected to a brake drum casting through two inlet channels.

[0008] The placement mechanism includes a base, a rotating shaft rotatably connected to the top of the base, and multiple placement plates fixed to the outer periphery of the rotating shaft. The area above the base is divided into a loading position, a cooling position, and a unloading position.

[0009] The cooling mechanism includes a water tank, a mounting plate on one side of the base, a protective cover mounted on the mounting plate via a telescopic component, a fixed pipe fixed to the inner wall of the top of the protective cover, a connecting pipe rotatably connected to the bottom of the fixed pipe, and a horizontal pipe fixed to the bottom of the connecting pipe. The bottom surface of the horizontal pipe is equipped with multiple nozzles. The top of the fixed pipe extends to the top of the protective cover and is fixed with a flexible hose. A water pump for conveying water in the water tank to the flexible hose is installed on the water tank. The protective cover is located directly above the cooling position.

[0010] An extraction mechanism, installed on top of the protective cover, is used to extract water vapor from inside the cover.

[0011] The above technical solution can not only effectively prevent the molten iron from eroding the cavity wall of the casting due to excessive flow rate, thereby reducing the defects of the brake drum sand hole, but also facilitate the cooling of the finished product and effectively recover the water vapor generated during the cooling process.

[0012] As a further improvement to the above solution, a driven gear is sleeved on the outer periphery of the rotating shaft, a servo motor is mounted on the top of the base, and a driving gear that meshes with the driven gear is sleeved on the output shaft of the servo motor.

[0013] The above technical solution can drive the rotating shaft to rotate, so that the casting mechanism can rotate sequentially to the cooling position and the unloading position after the casting is completed.

[0014] As a further improvement to the above solution, a water receiving tray located at the cooling position is fixed on the top of the base, and a water outlet pipe is installed at the bottom of the water receiving tray. The water receiving tray is located below the placement plate to catch the cooling water dripping from the placement plate. The top surface of the placement plate is provided with a groove for placing the pouring mechanism, and a drain hole is provided at the bottom of the groove.

[0015] The above technical solution can collect excess water, thus avoiding water waste.

[0016] As a further improvement to the above solution, a drive motor is installed on the top of the protective cover, the output of the drive motor extends into the inside of the protective cover and is fixed with a transmission gear, and a fixed gear that meshes with the transmission gear is sleeved on the outer periphery of the connecting pipe.

[0017] The above technical solution allows the horizontal tube to rotate during cooling, thus enabling water to be sprayed more evenly onto the surface of the pouring mechanism.

[0018] As a further improvement to the above solution, the air extraction mechanism includes a telescopic pipe fixed to the top of the fixed cover, an air intake pipe fixed to the top of the water tank, and an air pump installed on the top of the water tank. One end of the air intake pipe extends into the water tank and is inserted below the surface of the cooling water in the water tank. The other end of the air intake pipe is fixedly connected to the other end of the telescopic pipe. The air intake port of the air pump is equipped with an air supply pipe that communicates with the inside of the water tank.

[0019] The above technical solution can extract water vapor from the protective cover during cooling and liquefy it inside the water tank, thereby achieving water conservation.

[0020] As a further improvement to the above solution, a water baffle plate is fixed to the inner ring of the protective cover and is coaxially arranged therewith, and a water storage space is formed between the inner side of the water baffle plate and the inner ring of the protective cover. A drain pipe communicating with the water storage space is installed on the outer periphery of the protective cover, and a valve is installed on the drain pipe.

[0021] The above technical solution can collect water droplets adhering to the inner wall of the protective cover, preventing water droplets from dripping randomly from the inner wall of the protective cover.

[0022] As a further improvement to the above solution, an adjustment mechanism for driving the valve opening and closing is installed on the outer periphery of the protective cover. The adjustment mechanism includes a movable column, a limiting sleeve movably sleeved on the outer periphery of the movable column, a lifting plate fixed to the bottom of the movable column, and a transmission rack fixed to the bottom of the lifting plate. The limiting sleeve is fixed to the outer wall of the protective cover, one end of the lifting plate abuts against the outer wall of the protective cover, a spring is sleeved on the outside of the movable column, the bottom of the spring is fixed to the top surface of the lifting plate, and the top of the spring is fixed to the bottom surface of the limiting sleeve. One end of the valve stem of the valve is fixed with a connecting gear that meshes with the transmission rack, and a fixing block that cooperates with the lifting plate is fixed on the outer wall of the mounting plate near the protective cover.

[0023] The above technical solution allows the valve to be opened and closed automatically by the lifting and lowering of the protective cover, thereby facilitating the drainage of cold water from the water storage space.

[0024] As a further improvement to the above solution, the bottom of the protective cover is provided with multiple air inlets.

[0025] The above technical solution facilitates the entry of outside air into the protective shield, enhancing air circulation inside the shield.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. By setting up sprues, runners, connecting blocks, sub-runners, and ingates, and by adopting an open-type calculation method for runner area and using multiple overlapping methods, the flow rate of molten iron is reduced to within 0.8 m / s, thus avoiding the erosion of the casting cavity wall by the high flow rate of molten iron and effectively reducing the defects of brake drum sand holes.

[0028] 2. By coordinating the placement mechanism and the cooling mechanism, cooling or unloading operations can be performed on other cast products simultaneously with the casting process, thereby greatly improving production efficiency.

[0029] 3. By setting up an air extraction mechanism, the water vapor generated during cooling can be transported to the water tank, so that the water vapor can be pre-cooled and liquefied and retained in the water tank, thereby achieving the purpose of saving water.

[0030] By using a baffle plate and adjustment mechanism, not only can water droplets on the inner wall of the protective cover be prevented from dripping randomly, but the valve can also be opened and closed automatically by raising and lowering the fixed cover, thereby automatically draining the condensate in the water storage space. Attached Figure Description

[0031] Figure 1 This is a front view of the present invention;

[0032] Figure 2 A three-dimensional view of the casting mechanism;

[0033] Figure 3 for Figure 1 Bottom view of the pouring mechanism;

[0034] Figure 4 This is a structural diagram of the cooling mechanism and the placement mechanism;

[0035] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0036] Explanation of key symbols:

[0037] 1. Brake drum casting; 2. Straight sprue; 3. Horizontal sprue; 4. Connecting block; 5. Sprue; 6. Ingate; 7. Base; 8. Shaft; 9. Placement plate; 10. Water tray; 11. Water tank; 12. Air extractor; 13. Suction pipe; 14. Mounting plate; 15. Water pump; 16. Telescopic component; 17. Telescopic pipe; 18. Flexible hose; 19. Fixing pipe; 20. Protective cover; 21. Horizontal pipe; 22. Connecting pipe; 23. Water baffle; 24. Fixing block; 25. Limiting sleeve; 26. Movable column; 27. Lifting plate; 28. Drain pipe; 29. ​​Valve; 30. Transmission rack; 31. Air inlet. Detailed Implementation

[0038] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0039] Example 1:

[0040] Please combine Figure 1-5 This embodiment of an automotive brake drum casting system includes:

[0041] The casting mechanism includes a sprue 2, a horizontal sprue 3 fixed to the bottom of the sprue 2, and two connecting blocks 4 installed on the horizontal sprue 3. Both ends of the two connecting blocks 4 are fixed with gating channels 5. One side of the gating channel 5 is connected to the brake drum casting 1 through two ingate channels 6. The two connecting blocks 4 are symmetrically arranged on both sides of the sprue 2, and the distance from the sprue 2 is equal. This allows the molten iron flowing from the sprue 2 to reach the interior of the two connecting blocks 4 at the same time. Furthermore, the open calculation of the gating channel area and the use of multiple overlapping methods reduce the molten iron flow rate, keeping it below 0.8 m / s. This prevents the molten iron from scouring the mold cavity wall due to high flow rate, thereby effectively reducing the defects of sand holes in the brake drum.

[0042] The placement mechanism includes a base 7, a rotating shaft 8 rotatably connected to the top of the base 7, and multiple placement plates 9 fixed to the outer periphery of the rotating shaft 8. The base 7 is divided into a loading position, a cooling position, and a unloading position. A driven gear is sleeved on the outer periphery of the rotating shaft 8. A servo motor is mounted on the top of the base 7, and a driving gear meshing with the driven gear is sleeved on the output shaft of the servo motor. A water receiving tray 10 located at the cooling position is fixed on the top of the base 7, and a water outlet pipe is installed at the bottom of the water receiving tray 10. A drain valve is installed on the water outlet pipe. The water receiving tray 10 is located below the placement plates 9 to catch the cooling water dripping from the placement plates 9. The top surface of the placement plate 9 is provided with a groove for placing the pouring mechanism. The bottom of the tank is provided with a drain hole. When cooling, the water falling into the groove can fall into the water receiving tray 10 through the drain hole. When the water in the drain tray 10 accumulates to a certain amount, the drain valve on the water outlet pipe can be opened to drain the water in the water receiving tray. The rotation of the servo motor can drive the rotating shaft 8 to rotate, which can then place the pouring mechanism into the groove on the top surface of the placement plate 9 located in the feeding position. After pouring is completed, the servo motor is started again to rotate the poured pouring mechanism to the cooling position. Then the servo motor stops rotating and is started again after cooling is completed, so that the cooled pouring mechanism can be rotated to the unloading position for loading and unloading.

[0043] The cooling mechanism includes a water tank 11, a mounting plate 14 located on one side of a base 7, a protective cover 20 mounted on the mounting plate 14 via a telescopic member 16, a fixed pipe 19 fixed to the inner wall of the top of the protective cover 20, a connecting pipe 22 rotatably connected to the bottom of the fixed pipe 19, and a horizontal pipe 21 fixed to the bottom of the connecting pipe 22. Multiple nozzles are mounted on the bottom surface of the horizontal pipe 21. The top of the fixed pipe 19 extends above the protective cover 20 and is fixed with a flexible hose 18. A water pump 15 is mounted on the water tank 11 to transport water from the water tank 11 to the flexible hose 18. The protective cover 20 is located directly above the cooling position. A drive motor is mounted on the top of the protective cover 20, and the output of the drive motor extends into the interior of the protective cover 20 and is fixed with a transmission gear. A sleeve that meshes with the transmission gear is fitted around the outer periphery of the connecting pipe 22. When the casting mechanism rotates to the cooling position after the casting is completed, the telescopic component 16 extends, causing the protective cover 20 to descend until the protective cover 20 completely covers the casting mechanism and the bottom of the protective cover 20 abuts against the top surface of the placement plate 9. Then the extension of the telescopic component 16 stops. After that, the water pump 15 and the drive motor start simultaneously. The water pump 15 draws water from the water tank 11 into the horizontal pipe 21, and then sprays it from the nozzle onto the surface of the casting mechanism for cooling. At the same time, the drive motor rotates, causing the connecting pipe 22 to rotate, so that the horizontal pipe rotates continuously, which allows the cooling water to be sprayed more evenly on the surface of the casting mechanism. After the cooling is completed, the water pump 15 and the drive motor stop, and then the telescopic component 16 retracts, causing the protective cover 20 to rise back to its original position.

[0044] An air extraction mechanism, installed on top of the protective cover 20, is used to extract water vapor from inside the protective cover 20. The air extraction mechanism includes a telescopic pipe 17 fixed to the top of the protective cover 20, an air intake pipe 13 fixed to the top of the water tank 11, and an air pump 12 installed on the top of the water tank 11. One end of the air intake pipe 13 extends into the water tank 11 and is inserted below the surface of the cooling water in the water tank 11. The other end of the air intake pipe 13 is fixedly connected to the other end of the telescopic pipe 17. The air intake of the air pump 12 is equipped with an air supply pipe that communicates with the inside of the water tank 11. Multiple air inlets are provided at the bottom of the protective cover 20. At the same time as the water pump 15 starts, the air extractor 12 also starts. At this time, the pressure in the water tank 11 decreases, so that the water vapor generated in the protective cover 20 during cooling can be drawn into the water tank 11 through the suction pipe 13. The water vapor liquefies after encountering the cold water in the water tank 11, thus achieving the purpose of recovering water vapor and saving water. The air inlet 31 is designed to facilitate the entry of outside air into the interior of the protective cover 10 during air extraction, so that the water vapor in the protective cover 20 can be extracted normally, and it also helps to dissipate the heat inside the protective cover 20.

[0045] In this embodiment, the telescopic component 16 is an electric telescopic rod.

[0046] The implementation principle of this embodiment is as follows: During casting, the casting mechanism is placed in the groove on the top surface of the placement plate 9 located at the loading position, and then the casting is carried out. Molten iron is poured in from the straight pouring channel 2. After the casting is completed, the servo motor is started to rotate, so that the cast casting mechanism rotates to the cooling position. Then the servo motor stops rotating. At this time, the telescopic member 16 extends and drives the protective cover 20 to descend until the protective cover 20 completely covers the casting mechanism and the bottom of the protective cover 20 abuts against the top surface of the placement plate 9. Then the extension of the telescopic member 16 is stopped. After that, the water pump 15 and the drive motor start at the same time. The water pump 15 draws water from the water tank 11 into the horizontal pipe 21, and then sprays it from the nozzle onto the surface of the casting mechanism for cooling. At the same time, the drive motor rotates and drives the connecting pipe 22 to rotate, so that the horizontal pipe rotates continuously, so that the cooling water can be sprayed more evenly on the surface of the casting mechanism. After the cooling is completed, the water pump 15 and the drive motor are stopped, and then the telescopic member 16 is started to retract and drive the protective cover 20 to rise back to its original position.

[0047] When the water pump 15 starts, the air extractor 12 also starts. At this time, the pressure in the water tank 11 decreases, so that the water vapor generated in the protective cover 20 during cooling can be drawn into the water tank 11 through the suction pipe 13. After cooling is completed, the air extractor 12 is turned off.

[0048] After cooling is complete, restart the process to rotate the cooled casting mechanism to the unloading position for loading and unloading.

[0049] Example 2:

[0050] Combination Figure 4-5 Based on Embodiment 1, this embodiment further improves upon the following: a water baffle 23 is fixed to the inner ring of the protective cover 20 and is coaxially arranged therewith, and a water storage space is formed between the inner side of the water baffle 23 and the inner ring of the protective cover 20. A drain pipe 28 communicating with the water storage space is installed on the outer periphery of the protective cover 20, and a valve 29 is installed on the drain pipe 28. One end of the drain pipe 28 is located directly above the water receiving tray 10. When cooling, water sprayed on the surface of the casting mechanism will generate a large amount of water vapor. The water vapor will liquefy upon encountering the inner wall of the protective cover 20, resulting in a large number of water droplets adhering to the outer wall of the protective cover 20. The water droplets will collect in the water storage space under the action of gravity. Opening the valve 29 will drain the cooling water in the water storage space, and the water discharged from the drain pipe 28 will fall into the water receiving tray 10.

[0051] An adjustment mechanism for driving the opening and closing of valve 29 is installed on the outer periphery of the protective cover 20. The adjustment mechanism includes a movable column 26, a limiting sleeve 25 movably sleeved on the outer periphery of the movable column 26, a lifting plate 27 fixed to the bottom of the movable column 26, and a transmission rack 30 fixed to the bottom of the lifting plate 27. The limiting sleeve 25 is fixed to the outer wall of the protective cover 20. One end of the lifting plate 27 abuts against the outer wall of the protective cover 20. A spring is sleeved on the outside of the movable column 26. The bottom of the spring is fixed to the top surface of the lifting plate 27, and the top of the spring is fixed to the bottom surface of the limiting sleeve 25. One end of the valve stem of valve 29 is fixed with a connecting gear that meshes with the transmission rack 30. A fixing block 24 that cooperates with the lifting plate 27 is fixed on the outer wall of the mounting plate 14 near the protective cover 20. The movement of the transmission rack 30 can drive the connecting gear to rotate. After the connecting gear rotates, the opening and closing operation of valve 29 can be completed.

[0052] The implementation principle of this embodiment is as follows: During the descent of the protective cover 20, when the lifting plate 27 touches the fixed block 24, the lifting plate 27 will move upward relative to the protective cover 20 as the protective cover 20 continues to descend. This causes the transmission rack 30 to drive the connecting gear to rotate in the forward direction, thereby gradually opening the valve 29 and draining the cooling water in the water storage space. At this time, the spring is also compressed. When the cooling is completed and the protective cover 20 moves upward, the lifting plate 27 moves downward relative to the protective cover 20 under the action of the spring, thereby gradually closing the valve 29 until the lifting plate 27 disengages from the fixed block 24, at which point the valve is completely closed.

[0053] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A system for casting an automotive brake drum, comprising: The utility model provides a kind of casting mechanism, including sprue, fixed in the bottom of sprue, runner, two connecting blocks mounted on runner, two ends of two described connecting blocks are fixed with parting, and the one side of parting is connected with brake drum casting by two inner gates; The placing mechanism includes a base, a rotating shaft connected to the top of the base, and a plurality of placing plates fixed to the outer periphery of the rotating shaft. The top of the base is divided into an upper feeding position, a cooling position and a lower discharging position. The cooling mechanism includes a water tank, a mounting plate on one side of the base, a protective cover mounted on the mounting plate by a telescopic member, a fixed tube fixed to the inner wall of the top of the protective cover, a connecting tube rotatably connected to the bottom of the fixed tube, and a horizontal tube fixed to the bottom of the connecting tube. The bottom surface of the horizontal tube is provided with a plurality of nozzles. The top of the fixed tube extends above the protective cover and is fixed with a hose. A water pump is installed on the water tank for conveying water in the water tank to the hose. The protective cover is located directly above the cooling position. The air extraction mechanism is installed on the top of the protective cover and is used to extract water vapor in the protective cover outward. A water collecting tray is fixed to the top of the base and located in the cooling position. A water outlet pipe is installed at the bottom of the water collecting tray. The water collecting tray is located below the placing plates to collect the cooling water dripping from the placing plates. A recess for placing the casting mechanism is provided on the top surface of the placing plate, and a drain hole is formed at the bottom of the recess. The air extraction mechanism includes a telescopic pipe fixed to the top of the fixed cover, an air suction pipe fixed to the top of the water tank, and an air extractor installed on the top of the water tank. One end of the air suction pipe extends into the water tank and is inserted below the liquid level of the cooling water in the water tank. The other end of the air suction pipe is fixed to the other end of the telescopic pipe. The air inlet of the air extractor is provided with a gas conveying pipe in communication with the inside of the water tank. A water baffle is fixed to the inner circle of the protective cover coaxially. A water storage space is formed between the inner side of the water baffle and the inner circle of the protective cover. A drain pipe is installed on the outer periphery of the protective cover in communication with the water storage space. A valve is installed on the drain pipe. An adjusting mechanism is installed on the outer periphery of the protective cover for driving the valve to open and close. The adjusting mechanism includes a movable column, a limiting sleeve movably installed on the outer periphery of the movable column, a lifting plate fixed to the bottom of the movable column, and a transmission rack fixed to the bottom of the lifting plate. The limiting sleeve is fixed to the outer wall of the protective cover. One end of the lifting plate abuts against the outer wall of the protective cover. A spring is sleeved on the outside of the movable column. The bottom of the spring is fixed to the top surface of the lifting plate. The top of the spring is fixed to the bottom surface of the limiting sleeve. One end of the valve stem of the valve is fixed with a connecting gear meshing with the transmission rack. A fixed block matched with the lifting plate is fixed to the outer wall of the mounting plate near the protective cover. A driven gear is sleeved on the outer periphery of the rotating shaft. A servo motor is installed on the top of the base. A driving gear meshing with the driven gear is sleeved on the output shaft of the servo motor.

2. A system for casting brake drums for vehicles as claimed in claim 1, wherein, A plurality of air inlet holes are formed in the bottom of the protective cover.

3. The automotive brake drum pouring system of claim 1, wherein, ​

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