Automobile gear cover rear shell die-casting die convenient to demould

Abstract

The utility model relates to the technical field of die-casting dies, in particular to an automobile gear cover rear shell die-casting die convenient to demould, which comprises a guide rod base frame, a top plate is fixedly mounted on the outer surface of one end of the guide rod base frame, and a middle sliding plate is mounted on the outer surface of the guide rod base frame in a sliding manner. According to the automobile gear cover rear shell die-casting die convenient to demould, after molten metal is injected into the lower pressing die and the upper pressing die and cooled, a middle sliding plate can be driven by a hydraulic cylinder to move, the lower pressing die and the upper pressing die can be separated, an arc-shaped ejector rod can be released and popped out, and the die-casting efficiency is improved. When the arc-shaped ejector rod is popped out, the first ejector pin spring module is popped out along with the arc-shaped ejector rod, a formed part can be ejected out from the outer surface of the pressing die, the die-cast part can be taken down more easily, the difficulty of taking down the part is reduced, and the part cannot deform when taken.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to a die-casting mold for the rear housing of an automotive gear cover that is easy to demold. Background Technology

[0002] The rapid development of the automotive industry has placed higher demands on the production quality, efficiency, and cost control of automotive parts. As a key component of the automotive transmission system, the quality and performance of the rear housing of the gear cover directly affect the overall reliability and stability of the vehicle. Therefore, die-casting molds are needed to manufacture the rear housing of the gear cover. Molds refer to various molds and tools used in industrial production to obtain the required parts and items of the same size through injection molding, blow molding, extrusion, die casting, or forging. This improves the precision of the manufactured parts. However, when using existing die-casting molds, after the upper and lower molds are closed and die casting is completed, the finished product cannot be automatically ejected. Workers need to manually remove the die-cast product from the cavity, which is time-consuming and labor-intensive, and also reduces the efficiency of die casting production. Utility Model Content

[0003] The purpose of this invention is to provide a die-casting mold for the rear housing of an automotive gear cover that facilitates demolding, thereby solving the problem mentioned in the background art that the parts are not easy to remove from the mold after die casting.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a die-casting mold for the rear housing of an automotive gear cover that facilitates demolding, comprising a guide rod base frame, a top plate fixedly mounted on the outer surface of one end of the guide rod base frame, and a hydraulic cylinder fixedly mounted on the outer surface of the top plate, with the output end of the hydraulic cylinder penetrating through the outer surface of the top plate; a middle sliding plate slidably mounted on the outer surface of the guide rod base frame, and the middle sliding plate being connected to the output end of the hydraulic cylinder; a lower pressing mold fixedly mounted on the outer surface of the guide rod base frame, and a first ejector spring module slidably mounted inside the lower pressing mold, with the outer surface of the first ejector spring module penetrating through the outer surface of the lower pressing mold; arc-shaped ejector rods fixedly mounted on the outer surfaces of both sides of the first ejector spring module, with the arc-shaped ejector rods penetrating through the outer surface of the lower pressing mold; and the lower pressing mold being slidably connected to the arc-shaped ejector rods and the second ejector spring module, respectively.

[0005] Preferably, an upper pressure mold is fixedly installed on the outer surface of the intermediate sliding plate, and a second ejector spring module is slidably installed inside the upper pressure mold. The outer surface of the second ejector spring module is in close frictional connection with the inner surface of the upper pressure mold, and the outer surface of the upper pressure mold is penetrated by the second ejector spring module. An air cavity is opened inside the upper pressure mold, and a squeezing and pushing mechanism is provided between the air cavity and the intermediate sliding plate.

[0006] By adopting the above technical solution, the movement of the second ejector spring module can push away any parts that may be stuck inside the upper mold, so that when the upper mold and the lower mold are separated, no parts will stick inside the upper mold.

[0007] Preferably, the extrusion and pushing mechanism includes: an air cylinder, which is fixedly installed on one outer surface of the intermediate sliding plate; a sliding groove is fixedly installed on the outer surface of the top plate near the air cylinder, and the sliding groove is designed to be inclined; a limiting rod is fixedly installed on the outer surface of one end of the air cylinder, and the limiting rod engages with the sliding groove, and the sliding groove and the limiting rod are slidably connected; the air cylinder is connected to the upper pressing mold; and the air chamber is connected to the air cylinder.

[0008] Using the above technical solution, when the middle sliding plate moves, it will move along with the air cylinder, so that the limit rod can move along the direction of the slide groove. Through the inclined design of the slide groove, the air cylinder can send gas into the air chamber or extract gas from the air chamber when it moves. The movement of the second ejector spring module is controlled by the compression and absorption of the gas, so that the second ejector spring module can be ejected and retracted according to the opening and closing state of the lower and upper pressing molds.

[0009] Preferably, both the lower and upper pressing molds have cooling pipes inside, and the cooling pipes are connected to cold water pipes.

[0010] By injecting cooling water into the cooling pipes, the cooling water can move inside the lower and upper molds, allowing the molten metal injected into the lower and upper molds to cool down more quickly. This makes it easier to demold the lower and upper molds after they are opened and separated, and reduces the chance of parts deforming during removal due to overheating.

[0011] Preferably, grooved sleeves are threaded onto the outer surfaces of both ends of the lower pressing die, and top blocks are threaded onto the outer surfaces of both ends of the upper pressing die.

[0012] By adopting the above technical solution, the top block and the grooved sleeve can be easily installed and disassembled, allowing the top block and the grooved sleeve to be replaced after wear without scrapping the entire lower and upper pressing molds.

[0013] Preferably, the outer surfaces of the lower pressing mold and the upper pressing mold are in contact, the top block and the grooved sleeve are concentrically designed, and the grooved sleeve and the top block are inserted into each other.

[0014] By adopting the above technical solution, the lower and upper pressing molds can be positioned by inserting the top block and the grooved sleeve, making it easier for the lower and upper pressing molds to close and demold, and preventing them from getting stuck due to positional offset.

[0015] Preferably, the outer surfaces of the two sides of the lower pressing mold are fixedly provided with waist-shaped holes, and the outer surfaces of the two sides of the upper pressing mold are provided with another waist-shaped hole. The inside of the waist-shaped hole is provided with a fixing bolt, and the fixing bolt is threadedly connected to the guide rod base frame and the intermediate sliding plate respectively.

[0016] By adopting the above technical solution, the lower and upper pressing dies can be finely adjusted during installation through the waist-shaped hole. With the insertion of the top block and the grooved sleeve, the fixing bolts are screwed into the guide rod base frame and the middle sliding plate, making it easier to install and align the lower and upper pressing dies.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the easy-to-demold automotive gear cover rear housing die-casting mold:

[0018] 1. After the molten metal is injected into the lower and upper molds and cooled, the middle sliding plate can be moved by the hydraulic cylinder to separate the lower and upper molds, allowing the arc-shaped ejector rod to be released and ejected. After the arc-shaped ejector rod is ejected, the first ejector pin spring module will also be ejected, allowing the formed part to be ejected from the outer surface of the lower mold. This makes it easier to remove the die-cast part, reduces the difficulty of removing the part, and prevents deformation when picking up the part.

[0019] 2. As the hydraulic cylinder moves, it will bring the middle sliding plate closer to the top plate. At this time, the air cylinder will move along with it, allowing the limit rod to move as well. The limit rod can move along the direction of the slide groove, so that the air cylinder can squeeze out the gas when it rises and draw out the gas in the air chamber when it descends. This allows the second ejector spring module to be automatically ejected and retracted from the upper mold, so that after the upper mold and the lower mold are separated, the parts will not stick to the inside of the upper mold.

[0020] 3. The grooved sleeve and the oblong hole are threaded inside the lower and upper pressing dies, facilitating easy installation and removal of the grooved sleeve and oblong hole. This allows for replacement after wear. The insertion of the grooved sleeve and oblong hole ensures alignment between the lower and upper pressing dies, guaranteeing the accuracy of the die-cast parts. During installation, simply screw the fixing bolts into the guide rod base and the intermediate sliding plate, then adjust the positions of the lower and upper pressing dies. This adjustment via the oblong hole extends the service life of the lower and upper pressing dies, improves the accuracy of the die-cast parts, and facilitates easy alignment during installation. Attached Figure Description

[0021] Figure 1This is a three-dimensional structural diagram of the guide rod base frame and top plate of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the air cylinder and chute of this utility model;

[0023] Figure 3 This is an exploded three-dimensional structural diagram of the top plate and the lower pressing mold of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the lower and upper pressing molds of this utility model;

[0025] Figure 5 This is a cross-sectional perspective view of the lower and upper pressing molds of this utility model.

[0026] Figure 6 This is an exploded three-dimensional structural diagram of the first ejector spring module and the arc-shaped ejector rod of this utility model.

[0027] In the diagram: 1. Guide rod base frame; 2. Top plate; 3. Hydraulic cylinder; 4. Intermediate sliding plate; 5. Lower pressing mold; 6. Upper pressing mold; 7. First ejector pin spring module; 8. Arc-shaped ejector rod; 9. Second ejector pin spring module; 10. Air chamber; 11. Air cylinder; 12. Slide groove; 13. Limiting pull rod; 14. Cooling pipe; 15. Top block; 16. Groove sleeve; 17. Waist-shaped hole; 18. Fixing bolt. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-6This utility model provides a technical solution: a die-casting mold for the rear housing of an automotive gear cover that is easy to demold, including a guide rod base frame 1, a top plate 2 fixedly installed on the outer surface of one end of the guide rod base frame 1, and a hydraulic cylinder 3 fixedly installed on the outer surface of the top plate 2, with the output end of the hydraulic cylinder 3 penetrating through the outer surface of the top plate 2. A middle sliding plate 4 is slidably installed on the outer surface of the guide rod base frame 1, and the middle sliding plate 4 is connected to the output end of the hydraulic cylinder 3. A lower pressing mold 5 is fixedly installed on the outer surface of the guide rod base frame 1, and a first ejector spring module 7 is slidably installed inside the lower pressing mold 5, with the outer surface of the first ejector spring module 7 penetrating through the outer surface of the lower pressing mold 5. Arc-shaped ejector rods 8 are fixedly installed on the outer surfaces of both sides of the first ejector spring module 7, and the arc-shaped ejector rods 8 penetrate through the outer surface of the lower pressing mold 5. The lower pressing mold 5 is slidably connected to the arc-shaped ejector rods 8 and the second ejector spring module 9, respectively.

[0030] When the lower die 5 separates from the upper die 6, the upper die 6 will separate from the arc-shaped ejector rod 8. At this time, the arc-shaped ejector rod 8 will be released, allowing the first ejector spring module 7 to pop out automatically, so that the die-cast part can be lifted by the first ejector spring module 7, allowing the part to separate from the lower die 5, making it convenient for the part to be taken out of the lower die 5.

[0031] An upper pressure mold 6 is fixedly installed on the outer surface of the middle sliding plate 4. A second ejector spring module 9 is slidably installed inside the upper pressure mold 6. The outer surface of the second ejector spring module 9 is in close frictional connection with the inner surface of the upper pressure mold 6. The outer surface of the upper pressure mold 6 is penetrated by the second ejector spring module 9. An air cavity 10 is opened inside the upper pressure mold 6. A squeezing and pushing mechanism is provided between the air cavity 10 and the middle sliding plate 4.

[0032] After the lower pressure mold 5 separates from the upper pressure mold 6, the second ejector spring module 9 will be ejected from the upper pressure mold 6, allowing the die-cast parts to separate from the upper pressure mold 6 when the upper pressure mold 6 moves upward, so that the parts will not stick to the inside of the upper pressure mold 6.

[0033] The extrusion and pushing mechanism includes: an air cylinder 11, which is fixedly installed on one side of the outer surface of the intermediate sliding plate 4; a slide groove 12 is fixedly installed on the outer surface of the top plate 2 near the air cylinder 11, and the slide groove 12 is designed to be inclined; a limit rod 13 is fixedly installed on one end of the outer surface of the air cylinder 11, and the limit rod 13 is engaged with the slide groove 12, and the slide groove 12 and the limit rod 13 are slidably connected; the air cylinder 11 is connected to the upper pressing mold 6; and the air chamber 10 is connected to the air cylinder 11.

[0034] When the upper mold 6 separates from the lower mold 5, the hydraulic cylinder 3 will lift the intermediate sliding plate 4, allowing the intermediate sliding plate 4 to move together with the upper mold 6. At the same time, the intermediate sliding plate 4 will also move together with the air cylinder 11, allowing the limit rod 13 to move back and forth along the direction of the slide groove 12, so that the air cylinder 11 can work. When the intermediate sliding plate 4 moves away from the top plate 2, the air in the air chamber 10 can be extracted, allowing the second ejector spring module 9 to contract. When the upper mold 6 is reset, the air chamber 10 will be filled with air, at which time the second ejector spring module 9 will be ejected, so that the second ejector spring module 9 can automatically contract and eject along with the movement of the intermediate sliding plate 4 and the upper mold 6.

[0035] Both the lower die 5 and the upper die 6 have cooling pipes 14 inside, and the cooling pipes 14 are connected to cold water pipes.

[0036] After the molten metal is die-cast into the lower die 5 and the upper die 6, cooling water will be injected into the cooling pipe 14 so that the cooling water can move through the cooling pipe 14 and carry away the heat inside the lower die 5 and the upper die 6 to accelerate the cooling speed of the parts and prevent the parts from deforming easily due to excessive temperature when they are taken out.

[0037] The outer surfaces of both ends of the lower pressing die 5 are threaded with grooved sleeves 16, and the outer surfaces of both ends of the upper pressing die 6 are threaded with top blocks 15.

[0038] The grooved sleeve 16 is threaded inside the lower pressing die 5, and the upper pressing die 6 is threaded inside the upper pressing die 6. This allows the top block 15 and the grooved sleeve 16 to be replaced after long-term use, preventing the top block 15 and the grooved sleeve 16 from shifting positions of the lower pressing die 5 and the upper pressing die 6 due to wear, thus avoiding the need for the lower pressing die 5 and the upper pressing die 6 to be scrapped as a whole.

[0039] The outer surfaces of the lower pressing mold 5 and the upper pressing mold 6 are in contact. The top block 15 and the grooved sleeve 16 are concentrically designed, and the grooved sleeve 16 and the top block 15 are inserted into each other.

[0040] By inserting the top block 15 into the grooved sleeve 16, the lower pressing mold 5 and the upper pressing mold 6 can be easily aligned, so that the parts will not be scrapped due to misalignment after the lower pressing mold 5 and the upper pressing mold 6 are closed for die casting.

[0041] The outer surfaces of both sides of the lower pressing mold 5 are fixedly provided with waist-shaped holes 17, and the outer surfaces of both sides of the upper pressing mold 6 are provided with another waist-shaped hole 17. The inside of the waist-shaped hole 17 is provided with a fixing bolt 18, and the fixing bolt 18 is threadedly connected to the guide rod base frame 1 and the middle sliding plate 4 respectively.

[0042] During installation, simply insert the lower pressing mold 5 and the upper pressing mold 6. By inserting the top block 15 and the grooved sleeve 16, the lower pressing mold 5 and the upper pressing mold 6 are placed inside the guide rod base frame 1 and the fixing bolts 18 are screwed in. The lower pressing mold 5 and the upper pressing mold 6 can be adjusted through the waist-shaped hole 17, making the installation of the lower pressing mold 5 and the upper pressing mold 6 more convenient and eliminating the need for frequent measurement and adjustment.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for a rear housing of an automotive gear cover that is easy to demold, comprising a guide rod base frame (1), wherein a top plate (2) is fixedly mounted on the outer surface of one end of the guide rod base frame (1), and a hydraulic cylinder (3) is fixedly mounted on the outer surface of the top plate (2), and the output end of the hydraulic cylinder (3) penetrates through the outer surface of the top plate (2), wherein an intermediate sliding plate (4) is slidably mounted on the outer surface of the guide rod base frame (1), and the intermediate sliding plate (4) is connected to the output end of the hydraulic cylinder (3), characterized in that: A pressing mold (5) is fixedly installed on the outer surface of the guide rod base frame (1), and a first ejector spring module (7) is slidably installed inside the pressing mold (5). The outer surface of the first ejector spring module (7) penetrates the outer surface of the pressing mold (5). Arc-shaped ejector rods (8) are fixedly installed on the outer surfaces of both sides of the first ejector spring module (7), and the arc-shaped ejector rods (8) penetrate the outer surface of the pressing mold (5). The pressing mold (5) is slidably connected to the arc-shaped ejector rods (8) and the second ejector spring module (9) respectively.

2. The die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 1, is characterized in that: An upper pressure mold (6) is fixedly installed on the outer surface of the intermediate sliding plate (4). A second ejector spring module (9) is slidably installed inside the upper pressure mold (6). The outer surface of the second ejector spring module (9) is in close frictional connection with the inner surface of the upper pressure mold (6). The outer surface of the upper pressure mold (6) is penetrated by the second ejector spring module (9). An air cavity (10) is opened inside the upper pressure mold (6). A squeezing and pushing mechanism is provided between the air cavity (10) and the intermediate sliding plate (4).

3. The die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 2, is characterized in that: The extrusion and pushing mechanism includes: an air cylinder (11), which is fixedly installed on one side of the outer surface of the intermediate sliding plate (4). A sliding groove (12) is fixedly installed on the outer surface of the top plate (2) near the air cylinder (11), and the sliding groove (12) is inclined. A limiting rod (13) is fixedly installed on one end of the outer surface of the air cylinder (11), and the limiting rod (13) engages with the sliding groove (12). The sliding groove (12) and the limiting rod (13) are slidably connected. The air cylinder (11) is connected to the upper pressing mold (6), and the air chamber (10) is connected to the air cylinder (11).

4. The die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 1, is characterized in that: The lower pressing mold (5) and the upper pressing mold (6) are both provided with cooling pipes (14), and the cooling pipes (14) are connected to cold water pipes.

5. A die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 4, characterized in that: The outer surfaces of both ends of the lower pressing die (5) are threaded with grooved sleeves (16), and the outer surfaces of both ends of the upper pressing die (6) are threaded with top blocks (15).

6. The die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 5, is characterized in that: The outer surfaces of the lower pressing mold (5) and the upper pressing mold (6) are in contact. The top block (15) and the grooved sleeve (16) are concentrically designed, and the grooved sleeve (16) and the top block (15) are inserted into each other.

7. A die-casting mold for a rear housing of an automotive gear cover that facilitates demolding, as described in claim 6, characterized in that: The lower pressing mold (5) has waist-shaped holes (17) fixedly opened on both outer surfaces, and the upper pressing mold (6) has another waist-shaped hole (17) opened on both outer surfaces. The waist-shaped hole (17) is fitted with a fixing bolt (18), and the fixing bolt (18) is threadedly connected to the guide rod base frame (1) and the middle sliding plate (4) respectively.

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