A die-casting mold that facilitates demolding

Abstract

This utility model discloses a die-casting mold that facilitates demolding; it belongs to the field of die-casting mold technology; its key technical points include a die-casting platform, with a lower mold groove opened at the top center of the die-casting platform, and vertical rods fixedly connected to the four corners of the top of the die-casting platform, with a top plate fixedly connected to the top of the four vertical rods. This utility model forms a linkage structure with the connecting plate driven by the hydraulic rod, the U-shaped plate, and the push plate. After die-casting, the upward traction force of the hydraulic rod can drive the push plate to rise steadily along the lower mold groove, which can not only completely eject the molded workpiece from the lower mold groove without the need for manual reaching in to pick it up, greatly improving the convenience of operation, but also get rid of the single reliance on spring force. Even when facing workpieces with large volume, heavy weight, or high friction with the inner wall of the cavity, reliable demolding can be achieved by hydraulic power, avoiding demolding failure caused by spring fatigue and extending the service life of the mold.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, specifically a die casting mold that is easy to demold. Background Technology

[0002] A mold is a set of molds and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly achieves the shaping of objects by changing the physical state of the material being molded. Molds are widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression or injection molding of engineering plastics, rubber, ceramics, and other products.

[0003] For example, Chinese patent CN219944571U discloses a die-casting mold that facilitates demolding, including a base. The base is characterized by: a lower mold groove on its upper side; a connecting seat above the base; an upper mold pressing block fixed to the lower side of the connecting seat; two rectangular push rods fixed to either side of the upper mold pressing block on the lower side of the connecting seat; a square groove on the upper side of the base at the location of the rectangular push rods; and four inclined sliding grooves inside the base. The upper inclined surface of each inclined sliding groove communicates with the square groove, and the tip of each inclined sliding groove communicates with the lower mold groove. An inclined slider slides within the inclined sliding grooves, and a compression spring is fixed between one side of the inclined slider and one side of the inclined sliding groove. The technical problem this invention aims to solve is to provide a simple, easy-to-demold die-casting mold that can automatically eject the die-cast mold.

[0004] However, in practical applications, existing molds, when ejecting molded workpieces, are limited by the stroke design of the inclined slider and the structural space of the lower mold groove. The inclined slider can only lift the molded workpiece upwards a short distance, and cannot completely free the workpiece from the constraint of the lower mold groove. The operator still needs to manually reach into the lower mold groove to pick up the workpiece, which is not only inconvenient to operate, but may also make it difficult to pick up due to the residual adsorption force between the workpiece and the inner wall of the cavity. On the other hand, the demolding process relies entirely on the elastic force of the compression spring to push the inclined slider. If the molded workpiece is large in volume and heavy in weight, or if the friction between the workpiece and the inner wall of the lower mold groove is large, the elastic force of the spring is often insufficient to overcome these resistances. This not only makes it difficult to achieve an effective ejection action, but may also cause elastic fatigue due to the spring being under overload for a long time, shortening the service life of the mold and affecting the overall production efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a die-casting mold that is easy to demold, and this technical solution solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A die-casting mold for easy demolding includes a die-casting platform. A lower mold groove is formed at the center of the top of the die-casting platform. Vertical rods are fixedly connected to the four corners of the top of the die-casting platform. A top plate is fixedly connected to the top of the four vertical rods. A hydraulic rod is fixedly connected to the center of the top plate. A connecting plate located below the top plate is fixedly connected to the output end of the hydraulic rod. An upper mold pressing block that mates with the lower mold groove is fixedly connected to the bottom of the connecting plate. A matching push plate is provided inside the lower mold groove. Two sliding plates are fixedly connected to the bottom of the push plate. Sliding holes that mate with the sliding plates are formed at the bottom of the lower mold groove. A U-shaped plate is fixedly connected to the bottom of the connecting plate. The top of the vertical plates on both sides of the U-shaped plate is fixedly connected to a first locking block. Sliding grooves are provided on both the left and right sides of the connecting plate. A second locking block that cooperates with the first locking block is slidably arranged in the sliding groove. A first inclined surface is provided at the upper corner of the two first locking blocks that are close to each other. A second inclined surface is provided at the lower corner of the two second locking blocks that are far apart from each other. A spring is fixedly connected to the two second locking blocks that are close to each other. The other end of the spring is fixedly connected to the inner wall of the sliding groove. A synchronous unlocking component connected to the two second locking blocks is also provided on the front side of the connecting plate.

[0008] Preferably, guide sleeves are fixedly connected to both the left and right sides of the die-casting table, and the two vertical plates on both sides of the U-shaped plate are slidably connected to the two guide sleeves respectively.

[0009] Preferably, a fall-off limiting plate is fixedly connected to both vertical plates of the U-shaped plate, located above the guide sleeve, and a buffer pad is fixedly connected to the bottom of the fall-off limiting plate. The buffer pad is made of heat-resistant polyurethane material.

[0010] Preferably, a limiting groove is provided at the inner bottom of the slide groove, and a limiting block adapted to the limiting groove is fixedly connected to the bottom of the second block away from the second inclined surface. The limiting block is slidably disposed in the limiting groove in the same slide groove.

[0011] Preferably, all four vertical rods are slidably connected to the connecting plate via linear bearings.

[0012] Preferably, the synchronous unlocking component includes a linkage gear fixedly connected to the middle of the front side of the connecting plate. The front side of the connecting plate is fixedly connected to slide rails located on the upper and lower sides of the linkage gear. The front sides of the two slide rails are slidably connected to racks that mesh with the linkage gear. The two racks are respectively fixedly connected to two second locking blocks one by one through a connecting rod. A handle is fixedly connected to the front side of one of the racks.

[0013] Compared with the prior art, this utility model provides a die-casting mold that is easy to demold, and has the following beneficial effects:

[0014] 1. This utility model uses a hydraulic rod-driven connecting plate to form a linkage structure with the U-shaped plate and the push plate. After die casting, the upward traction force of the hydraulic rod can drive the push plate to rise steadily along the lower mold groove. This not only completely ejects the molded workpiece from the lower mold groove without requiring manual reach to pick it up, greatly improving operational convenience, but also eliminates the single reliance on spring force. Even when dealing with workpieces that are large in size, heavy in weight, or have high friction with the inner wall of the cavity, reliable demolding can be achieved by hydraulic power, avoiding demolding failure caused by spring fatigue and extending the service life of the mold.

[0015] 2. This utility model, through the design of the inclined surface cooperation of the first and second locking blocks and the synchronous unlocking component, allows the first locking block to push the second locking block to compress the spring through the inclined surface during the die-casting stage, ensuring that the upper mold pressing block is smoothly pressed down to complete the die-casting. After demolding, the second locking blocks on both sides can be synchronously controlled to disengage from the first locking block by simply using the handle to drive the rack and the linkage gear transmission, achieving rapid unlocking. With the guide sleeve guiding the sliding of the U-shaped plate and the limiting groove limiting the movement of the second locking block, the structural stability of the mold opening and closing and demolding process is ensured, and the ease of operation is improved, further guaranteeing the overall production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 In this utility model Figure 1 Enlarged view of point A;

[0018] Figure 3 This is a side sectional view of the present invention;

[0019] Figure 4 In this utility model Figure 3 Enlarged view of point B;

[0020] Figure 5 In this utility model Figure 3 Enlarged view of point C.

[0021] The following are the labels in the diagram: 1. Die-casting table; 2. Lower mold groove; 3. Vertical rod; 4. Top plate; 5. Hydraulic rod; 6. Connecting plate; 7. Upper mold pressure block; 8. Push plate; 9. Slide plate; 10. U-shaped plate; 11. First locking block; 12. Slide groove; 13. Second locking block; 14. Spring; 15. Synchronous unlocking component; 1501. Linkage gear; 1502. Slide rail; 1503. Rack; 1504. Handle; 16. Guide sleeve; 17. Return limit plate; 18. Buffer pad; 19. Limit groove; 20. Limit block. Detailed Implementation

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0023] Example 1

[0024] Please refer to Figures 1 to 5 As shown, a die-casting mold for easy demolding includes a die-casting table 1. A lower mold groove 2 is formed at the center of the top of the die-casting table 1. Vertical rods 3 are fixedly connected to the four corners of the top of the die-casting table 1. A top plate 4 is fixedly connected to the top of the four vertical rods 3. A hydraulic rod 5 is fixedly connected to the middle of the top plate 4. A connecting plate 6 located below the top plate 4 is fixedly connected to the output end of the hydraulic rod 5. An upper mold pressing block 7 that mates with the lower mold groove 2 is fixedly connected to the bottom of the connecting plate 6. A matching push plate 8 is provided inside the lower mold groove 2. Two sliding plates 9 are fixedly connected to the bottom of the push plate 8. Sliding holes that mate with the sliding plates 9 are formed at the bottom of the lower mold groove 2. The bottom ends of the two sliding plates 9 are fixed together. A U-shaped plate 10 is connected, and the top of the vertical plates on both sides of the U-shaped plate 10 is fixedly connected to a first locking block 11. The left and right sides of the connecting plate 6 are provided with sliding grooves 12. The sliding grooves 12 are slidably arranged with a second locking block 13 that cooperates with the first locking block 11. The upper corner of the two first locking blocks 11 that are close to each other is provided with a first inclined surface. The lower corner of the two second locking blocks 13 that are far apart from each other is provided with a second inclined surface. The two second locking blocks 13 that are close to each other are fixedly connected with a spring 14. The other end of the spring 14 is fixedly connected to the inner wall of the sliding groove 12. The front side of the connecting plate 6 is also provided with a synchronous unlocking component 15 that is connected to the two second locking blocks 13.

[0025] Those skilled in the art will understand that during the die-casting stage, the hydraulic rod 5 is activated, and its output end pushes the connecting plate 6 to slide downward along the vertical rod 3. The connecting plate 6 drives the upper die pressing block 7 to approach the lower die groove 2. During this process, the connecting plate 6 drives the two second locking blocks 13 to move downward synchronously. During the downward movement, the first inclined surface of the first locking block 11 contacts and squeezes the second inclined surface of the second locking block 13, forcing the second locking block 13 to compress the spring 14 and retract into the slide groove 12. The connecting plate 6 continues to descend. When the second locking block 13 is completely lower than the first locking block 11, the spring 14 resets and pushes the second locking block 13 to extend out of the slide groove 12 again. Subsequently, the upper die pressing block 7 continues to move downward, cooperating with the push plate 8 in the lower die groove 2 to complete the die casting of the workpiece. During the demolding stage, the hydraulic rod 5 retracts, causing the connecting plate 6 to rise. The extended second locking block 13 locks the first locking block 11, which in turn drives the push plate 8 to move upward synchronously through the U-shaped plate 10 and the sliding plate 9. The push plate 8 pushes the molded workpiece in the lower mold groove 2 to move upward. When the hydraulic rod 5 is fully retracted, the connecting plate 6 rises to its highest point, and the push plate 8 pushes the workpiece completely out of the lower mold groove 2. Then the molded workpiece is removed, and finally the two second locking blocks 13 are controlled to retract synchronously through the synchronous unlocking component 15, so that the U-shaped plate 10 and the push plate 8 are reset.

[0026] Through the inclined surface cooperation of the first locking block 11 and the second locking block 13 and the reset action of the spring 14, automatic avoidance during mold closing and automatic locking during mold demolding are achieved, without the need for additional manual control of the locking structure; with the power of the hydraulic rod 5 to drive the push plate 8, the workpiece can be completely ejected from the lower mold groove 2, solving the problem of insufficient ejection distance of traditional molds, and getting rid of the dependence on the single power of the spring, adapting to the demolding needs of workpieces of different weights.

[0027] Example 2

[0028] Furthermore, guide sleeves 16 are fixedly connected to both the left and right sides of the die-casting table 1, and the vertical plates on both sides of the U-shaped plate 10 are slidably connected to the two guide sleeves 16 respectively.

[0029] Those skilled in the art will understand that when the U-shaped plate 10 moves up and down driven by the hydraulic rod 5, the vertical plate of the U-shaped plate 10 slides along the inner wall of the guide sleeve 16, and the guide sleeve 16 restricts the direction of movement of the U-shaped plate 10.

[0030] The guide sleeve 16 effectively prevents the U-shaped plate 10 from shifting or wobbling during its up-and-down movement, ensuring that the push plate 8 always moves along the central axis of the lower mold groove 2, guaranteeing uniform force on the workpiece during demolding, reducing workpiece deformation or mold wear caused by the offset of the U-shaped plate 10, and extending the service life of the mold.

[0031] Example 3

[0032] Furthermore, a fall-off limiting plate 17 located above the guide sleeve 16 is fixedly connected to both vertical plates of the U-shaped plate 10. A buffer pad 18 is fixedly connected to the bottom of the fall-off limiting plate 17. The buffer pad 18 is made of heat-resistant polyurethane material.

[0033] Those skilled in the art will understand that after the mold is demolded, the U-shaped plate 10 resets and moves downward, and the return limiting plate 17 moves downward with the U-shaped plate 10 until the buffer pad 18 contacts the top of the guide sleeve 16. The buffer pad 18 undergoes elastic deformation to absorb the impact force, while the return limiting plate 17 restricts the U-shaped plate 10 from moving downward.

[0034] The heat-resistant polyurethane buffer pad 18 can withstand the high temperature during the die-casting process, preventing the buffer structure from failing due to high temperature; the buffer pad 18 absorbs the impact force when the U-shaped plate 10 falls back, reducing the collision and wear between the U-shaped plate 10 and the guide sleeve 16, and reducing the noise of the mold operation; the fall-back limit plate 17 precisely controls the fall-back position of the U-shaped plate 10, ensuring that the push plate 8 is in the preset position in the lower mold groove 2 during the next die-casting, thus ensuring the die-casting accuracy.

[0035] Example 4

[0036] Furthermore, a limiting groove 19 is provided at the inner bottom of the slide 12, and a limiting block 20 adapted to the limiting groove 19 is fixedly connected to the bottom of the second locking block 13 away from the second inclined surface. The limiting block 20 is slidably disposed in the limiting groove 19 in the same slide 12.

[0037] Those skilled in the art will understand that when the second locking block 13 is pressed by the first locking block 11 or pushed by the spring 14 to slide within the slide groove 12, the limiting block 20 slides synchronously along the limiting groove 19. The limiting groove 19 limits the sliding range of the limiting block 20, thereby limiting the movement of the second locking block 13.

[0038] To prevent the second locking block 13 from slipping out of the slide groove 12 due to excessive sliding or excessive compression of the spring 14, and to prevent the spring 14 from experiencing elastic fatigue or damage due to excessive compression, the fitting accuracy between the second locking block 13 and the first locking block 11 is ensured, the mold opening and closing process is ensured to reduce mold failures caused by abnormal displacement of the second locking block 13.

[0039] Example 5

[0040] Furthermore, all four vertical rods 3 are slidably connected to the connecting plate 6 via linear bearings.

[0041] Those skilled in the art will understand that when the hydraulic rod 5 drives the connecting plate 6 to move up and down, the connecting plate 6 slides along the vertical rod 3 through the linear bearing, and the linear bearing reduces the sliding friction between the connecting plate 6 and the vertical rod 3.

[0042] Linear bearings reduce the coefficient of friction between the connecting plate 6 and the vertical rod 3, thereby reducing wear between them and extending the service life of the vertical rod 3 and the connecting plate 6. At the same time, they make the up-and-down movement of the connecting plate 6 smoother and more stable, avoiding excessive frictional resistance that could increase the load on the hydraulic rod 5, reducing the energy consumption of the hydraulic system and improving the operating efficiency of the mold.

[0043] Example 6

[0044] Furthermore, the synchronous unlocking component 15 includes a linkage gear 1501 fixedly connected to the middle of the front side of the connecting plate 6. The front side of the connecting plate 6 is fixedly connected to slide rails 1502 located on the upper and lower sides of the linkage gear 1501. The front sides of the two slide rails 1502 are slidably connected to racks 1503 that mesh with the linkage gear 1501. The two racks 1503 are respectively fixedly connected to the two second locking blocks 13 one by one through a connecting rod. The front side of one of the racks 1503 is fixedly connected to a handle 1504.

[0045] Those skilled in the art will understand that during demolding, the worker pushes the handle 1504, causing the rack 1503 connected to it to slide along the slide rail 1502. The rack 1503 drives the linkage gear 1501 to rotate, and the linkage gear 1501 drives the rack 1503 on the other side to slide in the opposite direction along the slide rail 1502. The racks 1503 on both sides drive the two second locking blocks 13 to slide in the slide groove 12 synchronously through the connecting rod, so as to realize the synchronous disengagement of the two second locking blocks 13.

[0046] By cooperating with the linkage gear 1501 and the rack 1503, the two second locking blocks 13 are unlocked synchronously, avoiding uneven force and displacement of the U-shaped plate 10 caused by unilateral unlocking, and ensuring the stability of the demolding process; unlocking can be completed by operating only one handle 1504, simplifying the operation steps, improving demolding efficiency, and reducing the operating intensity of the staff.

[0047] The working principle and usage procedure of this device are as follows: First, the raw material to be die-cast is placed into the lower mold groove 2. Then, the hydraulic rod 5 is activated, and the output end of the hydraulic rod 5 extends downward, pushing the connecting plate 6 to slide downward along the four vertical rods 3. The upper mold pressing block 7 moves downward synchronously with the connecting plate 6, gradually approaching the lower mold groove 2. During the downward movement of the connecting plate 6, the second locking block 13 will contact the first locking block 11. The first inclined surface and the second inclined surface squeeze each other, forcing the second locking block 13 to retract into the sliding groove 12. At the same time, the spring 14 is compressed, and the connecting plate 6 continues to move downward. When the second locking block 13 is completely lower than the first locking block 11, the compressed spring 14 resets under its own elastic force, pushing the second locking block 13 out of the slide groove 12 again. Then, the upper mold pressure block 7 continues to move downward until it is completely embedded in the lower mold groove 2, applying stable pressure to the raw material and completing the die casting of the workpiece. After the workpiece is die-cast, the output end of the control hydraulic rod 5 retracts, driving the connecting plate 6 to slide upward. At this time, the second locking block 13 extending out of the slide groove 12 will engage with the first locking block 11 on the U-shaped plate 10, and the connecting plate 6 continues to... The first locking block 11 moves upward synchronously via the second locking block 13, which in turn drives the push plate 8 to move upward synchronously via the U-shaped plate 10. The push plate 8 pushes the formed workpiece in the lower mold groove 2 upward to disengage from the inner wall of the lower mold groove 2. When the output end of the hydraulic rod 5 is fully retracted, the connecting plate 6 rises to the top position, and the push plate 8 rises with the U-shaped plate 10 to above the opening of the lower mold groove 2, completely pushing the formed workpiece out of the lower mold groove 2, allowing the operator to directly remove the formed workpiece. Afterward, the operator pushes the handle 1504, which drives one of the racks 1503 along the slide rail 1. When 502 slides, the rack 1503 drives the linkage gear 1501 to rotate. The linkage gear 1501 then drives the rack 1503 on the other side to slide in the opposite direction along the slide rail 1502. The racks 1503 on both sides pull the two second locking blocks 13 into the slide groove 12 through the connecting rod, releasing the locking restriction of the second locking blocks 13 on the first locking block 11. Under its own gravity, the U-shaped plate 10 falls back down along the guide sleeve 16. The push plate 8 returns to the bottom of the lower mold groove 2 along with the U-shaped plate 10. The mold returns to its initial state and waits for the next die casting operation.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold for easy demolding, comprising a die-casting table (1), characterized in that, The die-casting platform (1) has a lower mold groove (2) at its top center. Vertical rods (3) are fixedly connected to the four corners of the top of the die-casting platform (1). A top plate (4) is fixedly connected to the top of the four vertical rods (3). A hydraulic rod (5) is fixedly connected to the middle of the top plate (4). A connecting plate (6) located below the top plate (4) is fixedly connected to the output end of the hydraulic rod (5). An upper mold pressing block (7) that matches the lower mold groove (2) is fixedly connected to the bottom of the connecting plate (6). A matching push plate (8) is provided inside the lower mold groove (2). Two sliding plates (9) are fixedly connected to the bottom of the push plate (8). A sliding hole that matches the sliding plate (9) is opened at the bottom of the lower mold groove (2). A U-shaped hole is fixedly connected to the bottom of the two sliding plates (9). The U-shaped plate (10) has a first locking block (11) fixedly connected to the top of the vertical plates on both sides. The connecting plate (6) has a sliding groove (12) on both the left and right sides. A second locking block (13) that cooperates with the first locking block (11) is slidably arranged in the sliding groove (12). A first inclined surface is provided at the upper corner of the two first locking blocks (11) that are close to each other. A second inclined surface is provided at the lower corner of the two second locking blocks (13) that are far from each other. A spring (14) is fixedly connected to the two second locking blocks (13) that are close to each other. The other end of the spring (14) is fixedly connected to the inner wall of the sliding groove (12). The front side of the connecting plate (6) is also provided with a synchronous unlocking component (15) that is connected to the two second locking blocks (13).

2. The die-casting mold for easy demolding according to claim 1, characterized in that, Guide sleeves (16) are fixedly connected to both the left and right sides of the die-casting table (1), and the two vertical plates of the U-shaped plate (10) are slidably connected to the two guide sleeves (16) respectively.

3. The die-casting mold for easy demolding according to claim 2, characterized in that, The U-shaped plate (10) has a fall-off limiting plate (17) fixedly connected to both vertical plates on both sides, which is located above the guide sleeve (16). The bottom of the fall-off limiting plate (17) is fixedly connected to a buffer pad (18), which is made of heat-resistant polyurethane material.

4. The die-casting mold for easy demolding according to claim 1, characterized in that, The inner bottom of the slide (12) is provided with a limiting groove (19). The bottom of the second card block (13) away from the second inclined surface is fixedly connected with a limiting block (20) that is adapted to the limiting groove (19). The limiting block (20) is slidably disposed in the limiting groove (19) in the same slide (12).

5. A die-casting mold for easy demolding according to claim 1, characterized in that, All four vertical rods (3) are slidably connected to the connecting plate (6) via linear bearings.

6. A die-casting mold for easy demolding according to claim 1, characterized in that, The synchronous unlocking component (15) includes a linkage gear (1501) fixedly connected to the middle of the front side of the connecting plate (6). The front side of the connecting plate (6) is fixedly connected to slide rails (1502) located on the upper and lower sides of the linkage gear (1501). The front sides of the two slide rails (1502) are slidably connected to racks (1503) that mesh with the linkage gear (1501). The two racks (1503) are respectively fixedly connected to two second locking blocks (13) one by one through a connecting rod. A handle (1504) is fixedly connected to the front side of one of the racks (1503).

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