A mold for casting an automobile brake drum

Abstract

The utility model discloses a mould for automobile brake drum casting, including lower mould, the upper surface of lower mould is equipped with adjustable upper mould, still include blanking mechanism, blanking mechanism: it includes sliding hole, sliding rod, ejector plate, limit ring, push, drive assembly and spring, the upper surface of lower mould is opened with sliding hole, and the inside sliding connection of sliding hole has sliding rod, and the upper end of sliding rod is equipped with ejector plate, and the lower side fixed cover of sliding rod's outer surface is equipped with limit ring, and the upper side movable cover of sliding rod's outer surface has spring, and spring is located between the upper surface of limit ring and the inner wall of sliding hole, and the inside of lower mould is equipped with adjustable push through drive assembly, and this automobile brake drum casting mould, through blanking mechanism, the automobile brake drum after forming is ejected lower mould, avoids the situation of the use performance of automobile brake drum being influenced by using the pick-up tool and drawing the scratch on the surface of automobile brake drum.

Description

Technical Field

[0001] This utility model relates to the field of automotive brake drum manufacturing technology, specifically to a mold for casting automotive brake drums. Background Technology

[0002] Brake drums are the key friction components of drum brakes. They work with brake shoes to decelerate and stop the car through friction. They are an important component in the car braking system that generates braking torque. In order to mass-produce car brake drums, molds for casting car brake drums are usually used.

[0003] In the use of existing automotive brake drum casting molds, the upper mold and the lower mold are usually combined. Then, the raw material is injected into the cavity formed by the combination of the upper mold and the lower mold through the feeding pipe. After the automotive brake drum is formed, the upper mold and the lower mold are separated, and then the finished product is taken out from the lower mold through the part removal tool.

[0004] Existing molds for casting automotive brake drums have the following problems: during the process of removing the finished product from the lower mold using a tool, scratches may be generated on the surface of the automotive brake drum, affecting its performance. To address this, we propose a new mold for casting automotive brake drums. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a mold for casting automobile brake drums. The molded automobile brake drum is ejected from the lower mold by the blanking mechanism, which avoids the situation where the performance of automobile brake drum is affected by scratches on the surface of automobile brake drum caused by the use of part removal tools. This can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mold for casting automobile brake drums, including a lower mold, an adjustable upper mold on the upper surface of the lower mold, and a feeding mechanism;

[0007] The unloading mechanism includes a sliding hole, a sliding rod, an ejector plate, a limiting ring, a push block, a drive assembly, and a spring. The upper surface of the lower mold has a sliding hole, and a sliding rod is slidably connected inside the sliding hole. An ejector plate is provided at the upper end of the sliding rod. A limiting ring is fixedly sleeved on the lower side of the outer surface of the sliding rod. A spring is movably sleeved on the upper side of the outer surface of the sliding rod. The spring is located between the upper surface of the limiting ring and the inner wall of the sliding hole. An adjustable push block is provided inside the lower mold through the drive assembly. The upper end of the left side of the push block is inclined. The unloading mechanism ejects the formed automotive brake drum from the lower mold, avoiding the situation where scratches are made on the surface of the automotive brake drum by using a part-removing tool, which would affect the performance of the automotive brake drum.

[0008] Furthermore, it also includes a microcontroller, which is located outside the lower mold. The input terminal of the microcontroller is electrically connected to an external power supply to facilitate the normal operation of the equipment.

[0009] Furthermore, the driving assembly includes a slide rail, a lead screw, and a sliding seat. The lower mold has a slide rail inside, and a lead screw is rotatably connected inside the slide rail. The outer surface of the lead screw is threadedly connected to the sliding seat, and the upper surface of the sliding seat is fixedly connected to the lower surface of the push block, which facilitates the normal operation of the feeding mechanism.

[0010] Furthermore, a motor is provided on the right side of the lower mold. The left end of the motor's output shaft is fixedly connected to the right end of the lead screw, and the input end of the motor is electrically connected to the output end of the microcontroller to provide driving force.

[0011] Furthermore, the drive assembly also includes rib grooves and ribs. Rib grooves are provided on both the front and rear sides of the inner wall of the slide rail, and ribs are provided on both the front and rear sides of the sliding seat. The ribs are slidably connected to the inside of the rib grooves on the same side to facilitate sliding and limiting.

[0012] Furthermore, the upper surface of the lower mold is provided with a top plate by evenly distributed support columns, and a support plate is slidably connected between the four support columns. An electric push rod is provided in the mounting hole on the upper surface of the top plate. The lower end of the telescopic shaft of the electric push rod is fixedly connected to the upper surface of the support plate. The input end of the electric push rod is electrically connected to the output end of the microcontroller to facilitate driving the upper mold to move.

[0013] Furthermore, the lower surface of the support plate is provided with an upper mold through evenly distributed fixed columns, and a feeding pipe is provided in the feeding port opened on the outer surface of the upper mold. An exhaust mechanism is provided between the upper mold and the support plate to facilitate the addition of raw materials.

[0014] Furthermore, the venting mechanism includes a sliding column, a venting hole, a baffle, and a limiting block. The sliding column is slidably connected to the sliding openings on both the left and right sides of the upper surface of the support plate. Venting holes are opened on both the left and right sides of the upper surface of the upper mold. The lower ends of the sliding columns are slidably connected to the interior of the venting holes on the same side. The lower ends of the sliding columns are equipped with baffles, and the upper ends of the sliding columns are equipped with limiting blocks to facilitate the discharge of gas from the mold cavity.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This mold for casting automobile brake drums has the following advantages:

[0016] The rotation of the lead screw causes the sliding seat to slide to the left. Because the upper part of the left side of the push block is inclined, the sliding seat drives the push block to move to the left while squeezing the lower end of the sliding rod. This causes the sliding rod to drive the ejector plate to move upward and eject the formed car brake drum from the lower mold. This will not damage the surface of the car brake drum and avoid the situation where the performance of the car brake drum is affected by scratches on the surface of the car brake drum caused by the use of a part removal tool. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is an enlarged structural schematic diagram of point A of this utility model;

[0020] Figure 4 This is an enlarged structural schematic diagram of section B of this utility model;

[0021] Figure 5 This is an enlarged structural schematic diagram of point C of this utility model.

[0022] In the diagram: 1 Lower mold, 2 Microcontroller, 3 Feeding mechanism, 31 Sliding hole, 32 Sliding rod, 33 Ejector plate, 34 Limiting ring, 35 Push block, 36 Drive assembly, 361 Slide rail, 362 Lead screw, 363 Sliding seat, 364 Rib groove, 365 Rib, 37 Spring, 4 Motor, 5 Support column, 6 Top plate, 7 Electric push rod, 8 Exhaust mechanism, 81 Sliding column, 82 Exhaust hole, 83 Baffle, 84 Limiting block, 9 Support plate, 10 Upper mold, 11 Feeding pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5This embodiment provides a technical solution: a mold for casting automotive brake drums, including a lower mold 1, an adjustable upper mold 10 on the upper surface of the lower mold 1, a feeding mechanism 3, and a microcontroller 2. The microcontroller 2 is located outside the lower mold 1, and its input terminal is electrically connected to an external power source. A top plate 6 is provided on the upper surface of the lower mold 1 via evenly distributed support columns 5. A support plate 9 is slidably connected between the four support columns 5. An electric push rod 7 is provided in the mounting hole on the upper surface of the top plate 6. The lower end of the telescopic shaft of rod 7 is fixedly connected to the upper surface of support plate 9. The input end of electric push rod 7 is electrically connected to the output end of microcontroller 2. The lower surface of support plate 9 is provided with upper mold 10 through evenly distributed fixed columns. The feeding port on the outer surface of upper mold 10 is provided with feeding pipe 11. An exhaust mechanism 8 is provided between upper mold 10 and support plate 9. The exhaust mechanism 8 includes sliding column 81, exhaust hole 82, baffle 83 and limiting block 84. (The diameter of sliding column 81 is smaller than the inner diameter of exhaust hole 82, and the diameter of baffle 83 is larger.) The upper surface of the support plate 9 has slidably connected sliding columns 81 in the sliding openings on both the left and right sides of the upper surface of the upper mold 10. Exhaust holes 82 are provided on both the left and right sides of the upper surface of the upper mold 10. The lower ends of the sliding columns 81 are slidably connected to the interior of the exhaust holes 82 on the same side. Each sliding column 81 has a baffle 83 at its lower end and a limit block 84 at its upper end. When casting automotive brake drums, the operator operates the microcontroller 2 to open the electric push rod 7. The telescopic shaft of the electric push rod 7 drives the support plate 9 along the support... The support column 5 moves downward, causing the upper mold 10 to move along with it until the lower surface of the upper mold 10 contacts the upper surface of the lower mold 1, forming a cavity between the upper mold 10 and the lower mold 1. Then, the raw material is added into the cavity through the feeding pipe 11. During feeding, the air in the cavity will be discharged from the vent 82 to prevent air bubbles from being present inside the molded car brake drum. At the same time, the raw material will push the sliding column 81 upward through the baffle 83 to prevent the raw material from leaking out. After the car brake drum is formed, the upper mold 10 and the lower mold 1 are separated by the electric push rod 7.

[0025] The feeding mechanism 3 includes a sliding hole 31, a sliding rod 32, an ejector plate 33, a limiting ring 34, a push block 35, a drive assembly 36, and a spring 37. The upper surface of the lower mold 1 has a sliding hole 31. A sliding rod 32 is slidably connected inside the sliding hole 31. An ejector plate 33 is located at the upper end of the sliding rod 32. A limiting ring 34 is fixedly sleeved on the lower side of the outer surface of the sliding rod 32. A spring 37 is movably sleeved on the upper side of the outer surface of the sliding rod 32. The spring 37 is located between the upper surface of the limiting ring 34 and the inner wall of the sliding hole 31. The interior of the lower mold 1 is open... The drive assembly 36 includes an adjustable push block 35, the upper end of the left side of which is inclined. The drive assembly 36 includes a slide rail 361, a lead screw 362, and a sliding seat 363. The lower mold 1 has a slide rail 361 inside, and the lead screw 362 is rotatably connected inside the slide rail 361. The outer surface of the lead screw 362 is threadedly connected to the sliding seat 363. The upper surface of the sliding seat 363 is fixedly connected to the lower surface of the push block 35. The right side of the lower mold 1 has a motor 4. The left end of the output shaft of the motor 4 is fixedly connected to the right end of the lead screw 362. The input terminal of motor 4 is electrically connected to the output terminal of microcontroller 2. The drive assembly 36 also includes a rib groove 364 and a rib 365. Ribs 364 are provided on both the front and rear sides of the inner wall of slide rail 361, and ribs 365 are provided on both the front and rear sides of sliding seat 363. The ribs 365 are slidably connected to the inside of the rib groove 364 on the same side. Then, motor 4 is turned on, and the output shaft of motor 4 drives the lead screw 362 to rotate. Under the constraint of rib groove 364 and rib 365, the rotation of lead screw 362 drives the threaded sliding seat 363 to move along slide rail 361. Sliding to the left, because the upper part of the left side of the push block 35 is inclined, the sliding seat 363 drives the push block 35 to move to the left while squeezing the lower end of the sliding rod 32. At this time, the limiting ring 34 compresses the spring 37, causing the sliding rod 32 to drive the ejector plate 33 to move upward and push the formed car brake drum out of the lower mold 1. After the car brake drum is removed, the screw 362 is rotated in the opposite direction to make the sliding seat 363 return to its original position. The rebound force of the spring 37 pushes the sliding rod 32 downward through the limiting ring 34, causing the ejector plate 33 to return to its original position and wait for subsequent use.

[0026] The working principle of the mold for casting automotive brake drums provided by this utility model is as follows: When casting an automotive brake drum, the operator operates the microcontroller 2 to open the electric push rod 7. The telescopic shaft of the electric push rod 7 drives the support plate 9 to move downward along the support column 5, causing the upper mold 10 to move along with it until the lower surface of the upper mold 10 contacts the upper surface of the lower mold 1, forming a cavity between the upper mold 10 and the lower mold 1. Then, the raw material is added into the cavity through the feeding pipe 11. During feeding, the air in the cavity will be discharged from the vent hole 82 to prevent air bubbles from existing inside the formed automotive brake drum. At the same time, the raw material will push the sliding column 81 upward through the baffle 83 to prevent leakage of the raw material. After the automotive brake drum is formed, the upper mold 10 and the lower mold 1 are separated by the electric push rod 7. When motor 4 is turned on, the output shaft of motor 4 drives the lead screw 362 to rotate. Under the constraint of rib groove 364 and rib 365, the rotation of lead screw 362 drives the threaded sliding seat 363 to slide to the left along slide rail 361. Because the upper part of the left side of push block 35 is inclined, the sliding seat 363 drives push block 35 to move to the left while squeezing the lower end of sliding rod 32. At this time, limit ring 34 compresses spring 37, causing sliding rod 32 to drive ejector plate 33 to move upward and eject the formed car brake drum from the lower mold 1. After the car brake drum is removed, turn lead screw 362 in the opposite direction to make sliding seat 363 return to its original position. The rebound force of spring 37 pushes sliding rod 32 downward through limit ring 34, causing ejector plate 33 to return to its original position, ready for subsequent use.

[0027] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be a PY32MD310, the motor 4 can be a Y180L-615, and the microcontroller 2 controls the operation of the motor 4 and the electric push rod 7 using methods commonly used in the prior art.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mold for casting automotive brake drums, comprising a lower mold (1), wherein an adjustable upper mold (10) is provided on the upper surface of the lower mold (1), characterized in that: It also includes the feeding mechanism (3); The feeding mechanism (3) includes a sliding hole (31), a sliding rod (32), an ejector plate (33), a limiting ring (34), a push block (35), a drive assembly (36), and a spring (37). The upper surface of the lower mold (1) is provided with a sliding hole (31). The sliding rod (32) is slidably connected inside the sliding hole (31). The upper end of the sliding rod (32) is provided with an ejector plate (33). The lower side of the outer surface of the sliding rod (32) is fixedly fitted with a limiting ring (34). The upper side of the outer surface of the sliding rod (32) is movably fitted with a spring (37). The spring (37) is located between the upper surface of the limiting ring (34) and the inner wall of the sliding hole (31). The lower mold (1) is provided with an adjustable push block (35) through the drive assembly (36). The upper side of the left side of the push block (35) is inclined.

2. The mold for casting automotive brake drums according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the lower mold (1), and the input terminal of the microcontroller (2) is electrically connected to an external power supply.

3. The mold for casting automotive brake drums according to claim 2, characterized in that: The drive assembly (36) includes a slide rail (361), a lead screw (362), and a sliding seat (363). The lower mold (1) is provided with a slide rail (361). The lead screw (362) is rotatably connected inside the slide rail (361). The outer surface of the lead screw (362) is threadedly connected to the sliding seat (363). The upper surface of the sliding seat (363) is fixedly connected to the lower surface of the push block (35).

4. The mold for casting automotive brake drums according to claim 3, characterized in that: The lower mold (1) is provided with a motor (4) on its right side. The left end of the output shaft of the motor (4) is fixedly connected to the right end of the lead screw (362). The input end of the motor (4) is electrically connected to the output end of the microcontroller (2).

5. A mold for casting automotive brake drums according to claim 2, characterized in that: The drive assembly (36) also includes a rib groove (364) and a rib (365). The inner wall of the slide rail (361) is provided with rib grooves (364) on both the front and rear sides. The sliding seat (363) is provided with ribs (365) on both the front and rear sides. The ribs (365) are slidably connected to the inside of the rib groove (364) on the same side.

6. A mold for casting automotive brake drums according to claim 2, characterized in that: The upper surface of the lower mold (1) is provided with a top plate (6) through evenly distributed support columns (5). A support plate (9) is slidably connected between the four support columns (5). An electric push rod (7) is provided in the mounting hole on the upper surface of the top plate (6). The lower end of the telescopic shaft of the electric push rod (7) is fixedly connected to the upper surface of the support plate (9). The input end of the electric push rod (7) is electrically connected to the output end of the microcontroller (2).

7. A mold for casting automotive brake drums according to claim 6, characterized in that: The lower surface of the support plate (9) is provided with an upper mold (10) through evenly distributed fixed columns. The upper mold (10) has a feeding port with a feeding pipe (11) inside. An exhaust mechanism (8) is provided between the upper mold (10) and the support plate (9).

8. A mold for casting automotive brake drums according to claim 7, characterized in that: The exhaust mechanism (8) includes a sliding column (81), an exhaust hole (82), a baffle (83), and a limiting block (84). The sliding column (81) is slidably connected to the sliding openings on the left and right sides of the upper surface of the support plate (9). The upper surface of the upper mold (10) is provided with exhaust holes (82) on both the left and right sides. The lower end of the sliding column (81) is slidably connected to the interior of the exhaust hole (82) on the same side. The lower end of the sliding column (81) is provided with a baffle (83), and the upper end of the sliding column (81) is provided with a limiting block (84).

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