A fixed mold ejection structure for preventing deformation of a die-cast product

Abstract

The utility model discloses a kind of fixed mould ejection structure for die casting product anti-deformation, including support platform, the surface of the support platform is attached with fixed mould, the lower portion of the support platform is provided with ejector pin plate, the inner wall of the ejector pin plate is equipped with threaded hole, the inner wall of the threaded hole is threadedly connected with screw rod, the top of the screw rod is fixedly connected with ejector pin, the ejector pin extends to the inside of the fixed mould by opening.This utility model relates to the technical field of die casting die production, and the fixed mould ejection structure for die casting product anti-deformation is cooperated between ejector pin plate, ejector pin, screw rod, threaded hole, locking nut and handle, the length of the ejector pin is adjusted, the length of the ejector pin is fixed, the length of the ejector pin cannot be adjusted, if facing different batches or different material parts, due to shrinkage difference, fixed length ejector pin is difficult to adapt to actual stripping demand, thereby reducing the use effect problem of ejection structure.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold production technology, specifically a fixed mold ejection structure for preventing deformation of die casting products. Background Technology

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a complex-shaped metal mold. After the part is die-cast, it needs to be ejected from the mold by an ejector structure for demolding.

[0003] In traditional ejection structures, a drive component moves multiple evenly distributed ejector pins to eject the part from the fixed mold. The multiple evenly distributed ejector pins can prevent the part from deforming during ejection.

[0004] However, since the length of the ejector pins inside the fixed mold is fixed, it is impossible to fine-tune the length of the ejector pins. If dealing with parts of different batches or different materials, due to the difference in shrinkage rate, the fixed length of the ejector pins is difficult to adapt to the actual demolding requirements. This can easily lead to insufficient ejection, causing the parts to stick to the mold, or excessive ejection, causing the surface of the parts to be dented and cracked, thereby reducing the effectiveness of the ejection structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fixed mold ejection structure for preventing deformation of die-cast products. It solves the problem that because the length of the ejector pins inside the fixed mold is fixed, it is impossible to fine-tune the length of the ejector pins. When dealing with parts of different batches or materials, due to differences in shrinkage rates, the fixed length of the ejector pins is difficult to adapt to the actual demolding requirements, thereby reducing the effectiveness of the ejection structure.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a fixed mold ejection structure for preventing deformation of die-cast products, including a support platform, a fixed mold attached to the surface of the support platform, an ejector plate provided below the support platform, a threaded hole provided on the inner wall of the ejector plate, a screw threadedly connected to the inner wall of the threaded hole, an ejector pin fixedly connected to the top of the screw, the ejector pin extending into the interior of the fixed mold through an opening, and the outer wall of the ejector pin attached to the inner wall of the fixed mold.

[0007] Preferably, a fastening nut is threaded onto the outer wall of the screw, the top of the fastening nut is connected to the bottom of the ejector plate, and a handle is fixedly connected to the outer wall of the fastening nut.

[0008] Preferably, a hydraulic cylinder is bolted to the bottom of the ejector plate, and a curved plate is bolted to the bottom of the hydraulic cylinder.

[0009] Preferably, the top of the curved plate is fixedly connected to the bottom of the support platform, and a reinforcing plate is fixedly connected to the outer wall of the curved plate.

[0010] Preferably, a groove is provided at the bottom of the fixed mold, a connecting plate is attached to the inner wall of the groove, the connecting plate is fixed to the inner wall of the fixed mold by bolts, a sliding rod is fixedly connected to the bottom of the connecting plate, a sleeve is slidably engaged with the outer wall of the sliding rod, and the outer wall of the sleeve is fixed to the inner wall of the ejector plate.

[0011] Preferably, the top of the fixed mold is fitted with the movable mold, and the fixed mold and the movable mold are provided with cavities.

[0012] Preferably, the side wall of the fixed mold is fixed with a connecting lug, which is fixed to the surface of the support platform by bolts.

[0013] This utility model provides a fixed mold ejection structure for preventing deformation of die-cast products. It has the following advantages: This fixed mold ejection structure for preventing deformation of die-cast products, through the cooperation of the ejector plate, ejector pin, screw, threaded hole, fastening nut, and handle, enables fine-tuning of the ejector pin. It solves the problem that because the length of the ejector pin inside the fixed mold is fixed, it is impossible to fine-tune the length of the ejector pin. Furthermore, due to differences in shrinkage rates, the fixed-length ejector pin is difficult to adapt to the actual demolding requirements for parts from different batches or made of different materials, thus reducing the effectiveness of the ejection structure.

[0014] The cooperation between the groove, connecting plate, slide bar and sleeve realizes the guidance of the ejector pin, reduces the risk of product deformation caused by ejector pin tilting, and solves the problem that the ejector pin is easily affected by lateral force during the ejection process and tilts. This not only causes uneven stress on the die-cast product, but also leads to surface dents, cracks or even overall twisting and deformation, which seriously affects the product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 An exterior schematic diagram;

[0017] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 for Figure 1 Enlarged view of section B in the middle.

[0019] In the diagram: 1. Support platform; 2. Fixed mold; 3. Moving mold; 4. Cavity; 5. Curved plate; 6. Reinforcing plate; 7. Hydraulic cylinder; 8. Ejector plate; 9. Ejector pin; 10. Screw; 11. Threaded hole; 12. Fastening nut; 13. Handle; 14. Groove; 15. Connecting plate; 16. Slide rod; 17. Sleeve; 18. Connecting lug. Detailed Implementation

[0020] 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.

[0021] Since the length of the ejector pins inside the fixed mold is fixed, it is impossible to fine-tune the length of the ejector pins. When dealing with parts of different batches or materials, due to differences in shrinkage rate, the fixed length of the ejector pins is difficult to adapt to the actual demolding requirements, thereby reducing the effectiveness of the ejection structure.

[0022] In view of this, the present invention provides a fixed mold ejection structure for preventing deformation of die-cast products. Through the cooperation between the ejector plate, ejector pin, screw, threaded hole, fastening nut and handle, the ejector pin can be finely adjusted. This solves the problem that since the length of the ejector pin inside the fixed mold is fixed, it is impossible to finely adjust the length of the ejector pin. If facing parts of different batches or different materials, due to the difference in shrinkage rate, the fixed length of the ejector pin is difficult to adapt to the actual demolding requirements, thereby reducing the effectiveness of the ejection structure.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0024] Example 1, by Figure 1-4 As can be seen, a fixed mold ejection structure for preventing deformation of die-cast products in this case includes a support platform 1, a fixed mold 2 attached to the surface of the support platform 1, an ejector plate 8 provided below the support platform 1, a threaded hole 11 opened on the inner wall of the ejector plate 8, a screw 10 threadedly connected to the inner wall of the threaded hole 11, an ejector pin 9 fixedly connected to the top of the screw 10, the ejector pin 9 extending into the interior of the fixed mold 2 through the opening, and the outer wall of the ejector pin 9 attached to the inner wall of the fixed mold 2.

[0025] In the specific implementation process, it is worth noting that the bottom of the support platform 1 is fixedly connected with four support legs to support the support platform 1. There are several ejector pins 9, which are evenly distributed inside the fixed mold 2. When ejecting the parts inside the fixed mold 2, several ejector pins eject the parts simultaneously to prevent the parts from deforming during ejection. The ejector pins 9 and the screw 10 are manufactured by precision machining as a whole to ensure their coaxiality and avoid bending or wear of the ejector pins 9 due to eccentric force during ejection. The screw 10 uses a high-precision fine thread with a small pitch (such as 0.5mm), which can achieve fine adjustment of the extension length of the ejector pins 9. When fine-tuning the ejector pins 9, the operator rotates the screw 10. The screw 10 rotates in the threaded hole 11 inside the ejector plate 8. The screw 10 drives the ejector pins 9 to rotate, and the ejector pins 9 move in the fixed mold 2 to adjust the ejector pins 9. After the adjustment is completed, the operator stops rotating the ejector pins 9 to achieve fine-tuning of the ejector pins 9.

[0026] Furthermore, a fastening nut 12 is threadedly connected to the outer wall of the screw 10, the top of the fastening nut 12 is connected to the bottom of the ejector plate 8, and a handle 13 is fixedly connected to the outer wall of the fastening nut 12.

[0027] In the specific implementation process, it is worth noting that after the ejector pin 9 is adjusted, the operator rotates the fastening nut 12 onto the screw 10, and then the operator rotates the handle 13. The handle 13 drives the fastening nut 12 to rotate on the screw 10, so that the fastening nut 12 fits against the bottom of the ejector plate 8. An elastic washer can be set between the fastening nut 12 and the ejector plate 8. When the fastening nut 12 is tightened, the elastic washer undergoes elastic deformation, generating axial pressure, further enhancing the tightening effect, and thus reinforcing the adjusted ejector pin 9.

[0028] Furthermore, a hydraulic cylinder 7 is bolted to the bottom of the ejector plate 8, and a curved plate 5 is bolted to the bottom of the hydraulic cylinder 7.

[0029] In the specific implementation process, it is worth noting that a synchronizer is installed between the two hydraulic cylinders 7, so that the two hydraulic cylinders 7 work simultaneously. The model of hydraulic cylinder 7 is CSH1. When the part inside the fixed mold 2 is ejected, the operator starts the hydraulic cylinder 7. The hydraulic cylinder 7 drives the ejector plate 8 to move, and the ejector plate 8 drives the ejector pin 9 to move. The ejector pin 9 moves in the fixed mold 2 and ejects the formed part from the fixed mold 2. The operator removes the part. After that, the hydraulic cylinder 7 drives the ejector pin 9 to descend into the fixed mold 2 and return to the initial position. The operator stops the hydraulic cylinder 7, thus driving the ejector pin 9 to work.

[0030] Furthermore, the top of the curved plate 5 is fixedly connected to the bottom of the support platform 1, and a reinforcing plate 6 is fixedly connected to the outer wall of the curved plate 5.

[0031] In the specific implementation process, it is worth noting that the reinforcing plate 6 and the curved plate 5 are connected by welding. The curved plate 5 supports the hydraulic cylinder 7, and the reinforcing plate 6 improves the strength of the curved plate 5 and prevents it from deforming under stress.

[0032] Furthermore, a groove 14 is provided below the fixed mold 2, and a connecting plate 15 is attached to the inner wall of the groove 14. The connecting plate 15 is fixed to the inner wall of the fixed mold 2 by bolts. A sliding rod 16 is fixedly connected to the bottom of the connecting plate 15. A sleeve 17 is slidably engaged with the outer wall of the sliding rod 16. The outer wall of the sleeve 17 is fixed to the inner wall of the ejector plate 8.

[0033] In the specific implementation process, it is worth noting that the inner wall of the sleeve 17 and the outer wall of the slide rod 16 adopt a clearance fit, and the clearance is controlled within a suitable range (such as 0.02-0.05mm). This ensures that the slide rod 16 slides smoothly within the sleeve 17 and also plays a good guiding role. When the ejector pin 9 moves, the ejector plate 8 moves, thereby driving the sleeve 17 to move. The sleeve 17 moves on the slide rod 16, thereby guiding the ejector pin 9. In this process, the operator can periodically add lubricating oil to the inside of the sleeve 17 to reduce the friction of the sleeve 17. The operator can install the slide rod 16 with bolts to guide the ejector pin 9, thereby reducing the risk of product deformation caused by the tilting of the ejector pin 9.

[0034] Example 2, by Figure 1 , 2 As can be seen from 4, the top of the fixed mold 2 is attached to the movable mold 3, and the fixed mold 2 and the movable mold 3 are provided with cavities 4;

[0035] In the specific implementation process, it is worth noting that the fixed mold 2 and the moving mold 3 cooperate to form the cavity 4 for forming the die-cast product. The shape and size of the cavity 4 are precisely processed according to the design requirements of the die-cast product. The moving mold 3 is connected to the external die-casting equipment, which allows the moving mold 3 to rise and fall. The surface of the moving mold 3 is provided with a pouring gate. The workers pour the molten raw material into the moving mold 3 through the pouring gate, so that it enters the cavity 4 and the part is die-cast.

[0036] Furthermore, the side wall of the fixed mold 2 is fixed with a connecting lug 18, which is fixed to the surface of the support platform 1 by bolts.

[0037] In the specific implementation process, it is worth noting that the number and arrangement of the connecting ears 18 are reasonably designed according to the size and weight of the fixed mold 2 to ensure that the fixed mold 2 can be firmly fixed on the support platform 1. The connecting ears 18 and the support platform 1 are connected by high-strength bolts, and anti-loosening washers are set at the bolt connection points to prevent the bolts from loosening due to vibration during the die casting process.

[0038] 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 fixed mold ejection structure for preventing deformation of die-cast products, comprising a support platform (1), characterized in that: The support platform (1) is attached to the surface of the fixed mold (2). An ejector plate (8) is provided below the support platform (1). The inner wall of the ejector plate (8) is provided with a threaded hole (11). A screw (10) is threaded to the inner wall of the threaded hole (11). An ejector pin (9) is fixed to the top of the screw (10). The ejector pin (9) extends into the interior of the fixed mold (2) through an opening. The outer wall of the ejector pin (9) is attached to the inner wall of the fixed mold (2).

2. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 1, characterized in that: The screw (10) is threaded with a fastening nut (12) on its outer wall. The top of the fastening nut (12) is connected to the bottom of the ejector plate (8). A handle (13) is fixedly connected to the outer wall of the fastening nut (12).

3. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 1, characterized in that: The bottom of the ejector plate (8) is fixed with a hydraulic cylinder (7) by bolts, and the bottom of the hydraulic cylinder (7) is fixed with a curved plate (5) by bolts.

4. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 3, characterized in that: The top of the curved plate (5) is fixed to the bottom of the support platform (1), and a reinforcing plate (6) is fixedly connected to the outer wall of the curved plate (5).

5. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 1, characterized in that: The fixed mold (2) has a groove (14) at its bottom. A connecting plate (15) is attached to the inner wall of the groove (14). The connecting plate (15) is fixed to the inner wall of the fixed mold (2) by bolts. A sliding rod (16) is fixedly connected to the bottom of the connecting plate (15). A sleeve (17) is slidably engaged with the outer wall of the sliding rod (16). The outer wall of the sleeve (17) is fixed to the inner wall of the ejector plate (8).

6. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 1, characterized in that: The top of the fixed mold (2) is fitted with the movable mold (3), and the fixed mold (2) and the movable mold (3) are provided with cavities (4).

7. The fixed mold ejection structure for preventing deformation of die-cast products according to claim 1, characterized in that: The side wall of the fixed mold (2) is fixed with a connecting ear (18), which is fixed to the surface of the support platform (1) by bolts.

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