Secondary segmented ejection die for preventing deformation of deep cavity part

Abstract

The utility model relates to a secondary segmented ejection die -casting die of preventing deformation of deep cavity part, including upper mould frame and lower mould frame, install upper mould core and lower mould core between upper mould frame and lower mould frame, set up mould cavity between upper mould core and lower mould core, one mould foot is installed to both sides of lower end of lower mould frame, install the lower end of two mould feet with lower mould plate, install the top plate assembly that goes up and down between two mould feet, be provided with a plurality of insertion needle in mould cavity on top plate assembly, install the ejection plate that goes up and down in the below of top plate assembly on the upper end of lower mould plate, install spring no. One between ejection plate and lower mould plate, install a connecting rod vertically on ejection plate, the upper end of connecting rod is connected with the forming top block, the bottom of top plate assembly is arranged with two relative sliding sliders and the elastic mechanism of auxiliary slider on both sides of ejection plate. The utility model makes secondary ejection demoulding to the position part of the product deep cavity of the product tight force, reduces the ejection deformation because of the tight force being too big.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts. Background Technology

[0002] Due to the inherent structural characteristics of deep-cavity parts, the area with the greatest clamping force is located in the deep cavity. Traditional ejection methods often employ a single ejector pin or an ejector plate. For deep-cavity parts, if ejection is only performed from the bottom edge using ejector pins, a small number of pins can lead to stress concentration, making it prone to misalignment or cracking; a large number of pins increases mold complexity and processing costs, and even small pins may leave noticeable indentations on the part's surface. If an entire ejector plate is used for ejection, the friction between the ejector plate and the inner wall of the deep cavity is significant for deep-cavity parts, making demolding difficult and potentially causing part deformation. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a secondary segmented ejection die casting mold for preventing deformation of deep cavity parts. It performs secondary ejection and demolding on a part of the product with greater clamping force (i.e., the upper part of the deep cavity of the product), thereby reducing ejection deformation due to excessive clamping force.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts is provided, including an upper mold frame and a lower mold frame. An upper mold core and a lower mold core are stacked vertically between the upper and lower mold frames, and a mold cavity is provided between the upper and lower mold cores. A mold foot is installed on each side of the lower end of the lower mold frame, and a lower template is installed at the lower end of the two mold feet. A vertically lifting top plate assembly is installed between the two mold feet, and the top plate assembly is provided with several ejector pins that insert into the mold cavity. The upper end of the lower template is located below the top plate assembly. An ejector plate that moves up and down is installed. A spring is installed between the ejector plate and the lower mold plate. A connecting rod is vertically installed on the ejector plate. The upper end of the connecting rod passes through the top plate assembly, the lower mold frame and the lower mold core from bottom to top and extends into the mold cavity and is connected to a forming top block. The bottom of the top plate assembly is located on both sides of the ejector plate, where two relatively sliding sliders and an auxiliary slider elastic mechanism are symmetrically arranged. The lower part of the inner side of each slider is provided with a protrusion that catches the side of the ejector plate. The bottom of the slider is provided with an inclined guide groove. A lever is installed at the upper end of the lower mold plate to insert into the inclined guide groove.

[0005] As a supplement to the technical solution described in this utility model, a cooling pipe is vertically formed at the center of the bottom of the connecting rod. The lower end of the cooling pipe is a threaded hole. The lower end of the connecting rod is embedded in the ejector plate. A fixing screw is installed from bottom to top on the bottom of the ejector plate. The upper end of the fixing screw is threadedly connected to the lower end of the cooling pipe. The fixing screw not only fixes the connecting rod to the ejector plate together, but also seals the lower end of the cooling pipe, achieving multiple benefits.

[0006] As a supplement to the technical solution described in this utility model, the lower template is provided with a clearance hole for accommodating the fixing screw.

[0007] As a supplement to the technical solution described in this utility model, the fixing screw has an internal hexagonal hole in the middle of its bottom surface.

[0008] As a supplement to the technical solution described in this utility model, four springs are evenly arranged between the ejector plate and the lower template, and the four springs are arranged in a rectangular shape.

[0009] As a supplement to the technical solution described in this utility model, a spring groove for accommodating a spring is provided between the lower template and the top plate assembly.

[0010] As a supplement to the technical solution described in this utility model, the elastic mechanism includes a limiting pin, a second spring, and a top cover. The bottom of the top plate assembly is provided with a groove for the slider to slide laterally. An inner cavity is opened laterally on the inner side of the slider. The second spring and the top cover are installed sequentially from the inside to the outside of the inner cavity. The middle part of the top cover is recessed inward. The top cover rests on the side of the ejector plate. A limiting pin is installed inside the top cover. One end of the limiting pin passes laterally through the top cover and is threadedly connected to the inner cavity.

[0011] As a supplement to the technical solution described in this utility model, a lower forming seat for inserting into the mold cavity is installed at the upper end of the lower mold core, and a forming top block is set at the upper end of the lower forming seat. The forming top block and the lower forming seat are spliced ​​together to jointly assist in the deep cavity forming of the product, and the connecting rod is set through the lower forming seat.

[0012] As a supplement to the technical solution described in this utility model, a limit screw is provided between the ejector plate and the lower template.

[0013] Beneficial effects: This utility model relates to a secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts. It performs secondary ejection demolding on a part of the product with greater clamping force (i.e., the upper part of the deep cavity), reducing ejection deformation due to excessive clamping force. The forming top block and the lower forming seat are spliced ​​together to jointly assist in the forming of the deep cavity of the product. The forming top block assists the upper part of the deep cavity of the product, while the lower forming seat assists the lower part of the deep cavity of the product. The forming top block and the lower forming seat are demolded separately, which can greatly reduce the demolding difficulty and product deformation. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention;

[0015] Figure 2 This is a utility model Figure 1 A magnified view of a section at point A in the middle;

[0016] Figure 3 This is a schematic diagram of the slider described in this utility model;

[0017] Figure 4 This is a cross-sectional view of the connecting rod, forming top block, deflector block, slider, and ejector plate described in this utility model;

[0018] Figure 5 This is a utility model Figure 4 A magnified view of a section at point B in the middle;

[0019] Figure 6 This is a cross-sectional view of the lower template and the top plate described in this utility model.

[0020] Diagram: 1. Upper mold frame, 2. Upper mold core, 3. Mold cavity, 4. Lower mold core, 5. Lower mold frame, 6. Mold foot, 7. Connecting rod, 8. Molding ejector block, 9. Lower template, 10. Top plate assembly, 11. Push block, 12. Spring 1, 13. Ejector plate, 14. Ejector pin, 15. Cooling pipe, 16. Slider, 17. Fixing screw, 18. Clearance hole, 19. Spring groove, 20. Angled guide groove, 21. Protrusion, 22. Socket hexagon hole, 23. Lower molding seat, 24. Limiting pin, 25. Spring 2, 26. Top cover, 27. Inner cavity, 28. Limiting screw, 29. Movable groove. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0022] The present invention relates to a secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts, such as... Figure 1-6 As shown, the system includes an upper mold frame 1 and a lower mold frame 5. An upper mold core 2 and a lower mold core 4, stacked vertically, are installed between the upper mold frame 1 and the lower mold frame 5. A mold cavity 3 is provided between the upper mold core 2 and the lower mold core 4. A mold foot 6 is installed on each side of the lower end of the lower mold frame 5. A lower template 9 is installed at the lower end of the two mold feet 6. A vertically movable top plate assembly 10 is installed between the two mold feet 6. Several ejector pins 14 inserted into the mold cavity 3 are provided on the top plate assembly 10. A vertically movable ejector plate 13 is installed at the upper end of the lower template 9, below the top plate assembly 10. A vertically movable ejector plate 13 is installed between the ejector plate 13 and the lower template 9. A spring 12 is provided. A connecting rod 7 is vertically installed on the ejector plate 13. The upper end of the connecting rod 7 passes through the top plate assembly 10, the lower mold frame 5 and the lower mold core 4 from bottom to top and extends into the mold cavity 3 and is connected to the forming top block 8. The bottom of the top plate assembly 10 is located on both sides of the ejector plate 13 and two relatively sliding sliders 16 and the elastic mechanism of the auxiliary sliders 16 are symmetrically arranged. The lower part of the inner side of each slider 16 is provided with a protrusion 21 that catches the side of the ejector plate 13. The bottom of the slider 16 is provided with an inclined guide groove 20. The upper end of the lower mold plate 9 is provided with a lever 11 that inserts into the inclined guide groove 20.

[0023] A cooling pipe 15 is vertically formed at the center of the bottom of the connecting rod 7. The lower end of the cooling pipe 15 is a threaded hole. The lower end of the connecting rod 7 is embedded in the ejector plate 13. A fixing screw 17 is installed from bottom to top on the bottom of the ejector plate 13. The upper end of the fixing screw 17 is threadedly connected to the lower end of the cooling pipe 15. The fixing screw 17 not only fixes the connecting rod 7 to the ejector plate 13 together, but also seals the lower end of the cooling pipe 15, achieving multiple benefits.

[0024] The lower template 9 is provided with a clearance hole 18 to accommodate the fixing screw 17. The clearance hole 18 is provided to prevent the fixing screw 17 from interfering with the lower template 9 when it moves with the ejector plate 13. The clearance hole 18 is a vertical through hole.

[0025] The fixing screw 17 has an internal hexagonal hole 22 in the middle of its bottom surface. One end of an internal hexagonal wrench is inserted into the internal hexagonal hole 22, and the internal hexagonal wrench is rotated to control the fixing screw 17 to tighten or loosen.

[0026] Four springs 12 are evenly arranged between the ejector plate 13 and the lower template 9, and the four springs 12 are arranged in a rectangular shape; the arrangement of the four springs 12 in this way can ensure the stability of the ejector plate 13 during ejection.

[0027] A spring groove 19 is provided between the lower template 9 and the top plate assembly 10 to accommodate the spring 12. The spring groove 19 limits the spring 12 so that the spring 12 can provide stable elastic force.

[0028] The elastic mechanism includes a limiting pin 24, a second spring 25, and a top cover 26. The bottom of the top plate assembly 10 has a groove for the slider 16 to slide laterally. The inner side of the slider 16 has a transverse cavity 27. The second spring 25 and the top cover 26 are installed sequentially from the inside to the outside of the inner cavity 27. The top cover 26 is recessed in the middle and rests against the side of the ejector plate 13. The limiting pin 24 is installed inside the top cover 26. One end of the limiting pin 24 passes laterally through the top cover 26 and is threadedly connected to the inner cavity 27. During the up-and-down sliding of the ejector plate 13, the top cover 26 relies on the elastic force of the second spring 25 to keep one end of the top cover 26 against the side of the ejector plate 13. The cap of the limiting pin 24 slides laterally in the recess of the top cover 26. When the lever 11 disengages from the inclined guide groove 20, the slider 16 relies on the elastic force of the second spring 25 to keep its position still, making it easy for the lever 11 to be reinserted into the inclined guide groove 20.

[0029] The lower mold core 4 is equipped with a lower forming seat 23 that inserts into the mold cavity 3. The forming top block 8 is set on the upper end of the lower forming seat 23. The forming top block 8 and the lower forming seat 23 are spliced ​​together to assist in the deep cavity forming of the product. The connecting rod 7 is set through the lower forming seat 23.

[0030] A limiting screw 28 is provided between the ejector plate 13 and the lower template 9 to control the upward distance of the ejector plate 13. (Refer to...) Figure 6 As shown, the bottom of the lower template 9 has a movable groove 29, in which a limiting screw 28 is installed. One end of the limiting screw 28 passes through the top of the movable groove 29 and is threadedly connected to the ejector plate 13. The width of the movable groove 29 is slightly larger than the size of the cap of the limiting screw 28. The top of the movable groove 29 has a hole through which the rod of the limiting screw 28 passes. The cap of the limiting screw 28 cannot pass through the hole, and the cap of the limiting screw 28 slides up and down inside the movable groove 29 to achieve the limiting movement of the ejector plate 13. Using the limiting screw 28 for position limitation is a conventional technical means, so the claims do not specifically describe the structure.

[0031] The molding ejector block 8 and the lower molding seat 23 are joined together to assist in the deep cavity molding of the product. The molding ejector block 8 assists the upper part of the deep cavity, while the lower molding seat 23 assists the lower part of the deep cavity. After the product inside the mold cavity 3 is molded, the mold opens, and the upper mold frame 1 and upper mold core 2 separate from the lower mold frame 5 and lower mold core 4. The ejector plate assembly 10 controls the ejector pin 14 to eject the product upward. At this time, the two sliders 16 at the bottom of the ejector plate assembly 10 respectively engage with the two sides of the ejector plate 13 through the protrusions 21. Therefore, the ejector plate 13 moves upward synchronously with the ejector plate assembly 10. The ejector plate 13 controls the molding ejector block 8 to move upward through the connecting rod 7. The molding ejector block 8 separates from the lower molding seat 23, and the molding ejector block 8 and ejector pin 14... The product is pushed upwards to achieve demolding. After the ejector plate 13 slides upwards by 15mm with the top plate assembly 10 (the 15mm range of motion can be adjusted according to the actual situation; currently, 15mm is only for illustrative purposes), the two levers 11 on the lower template 9 control the two sliders 16 to move away from each other, causing the protrusions 21 at the bottom of the two sliders 16 to separate from the sides of the ejector plate 13. After the ejector plate 13 is released from the top plate assembly 10, the ejector plate 13 is supported by spring 12 and held in place by the limit screw, keeping the ejector plate 13 and the lower template 9 relatively stationary. The top plate assembly 10 continues to eject the product upwards, causing the molding ejector block 8 to separate from the upper part of the product's deep cavity. This utility model performs secondary ejection demolding for a portion of the product with high clamping force (i.e., the upper part of the product's deep cavity), reducing deformation caused by excessive clamping force during ejection.

[0032] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0035] The above provides a detailed description of a secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts, comprising an upper mold frame (1) and a lower mold frame (5), wherein an upper mold core (2) and a lower mold core (4) stacked vertically are installed between the upper mold frame (1) and the lower mold frame (5), and a mold cavity (3) is provided between the upper mold core (2) and the lower mold core (4), characterized in that: A mold foot (6) is installed on each side of the lower end of the lower mold frame (5). A lower template (9) is installed at the lower end of the two mold feet (6). A top plate assembly (10) that can move up and down is installed between the two mold feet (6). Several ejector pins (14) that are inserted into the mold cavity (3) are provided on the top plate assembly (10). An ejector plate (13) that can move up and down is installed at the upper end of the lower template (9) below the top plate assembly (10). A spring (12) is installed between the ejector plate (13) and the lower template (9). A connecting rod (7) is vertically installed on the ejector plate (13). The upper end of the mold extends into the mold cavity (3) from bottom to top through the top plate assembly (10), the lower mold frame (5) and the lower mold core (4) and is connected to the forming top block (8). The bottom of the top plate assembly (10) is symmetrically arranged on both sides of the ejector plate (13) with two relatively sliding sliders (16) and the elastic mechanism of the auxiliary slider (16). The lower part of the inner side of each slider (16) is provided with a protrusion (21) that catches the side of the ejector plate (13). The bottom of the slider (16) is provided with an inclined guide groove (20). The upper end of the lower mold plate (9) is equipped with a pry block (11) that inserts into the inclined guide groove (20).

2. The secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: A cooling pipe (15) is vertically opened at the bottom center of the connecting rod (7). The lower end of the cooling pipe (15) is a threaded hole. The lower end of the connecting rod (7) is embedded in the ejector plate (13). A fixing screw (17) is installed from bottom to top on the bottom of the ejector plate (13). The upper end of the fixing screw (17) is threadedly connected to the lower end of the cooling pipe (15).

3. The secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 2, characterized in that: The lower template (9) is provided with clearance holes (18) for accommodating fixing screws (17).

4. The secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 2, characterized in that: The fixing screw (17) has an internal hexagonal hole (22) in the middle of its bottom surface.

5. A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: Four springs (12) are evenly arranged between the ejector plate (13) and the lower template (9), and the four springs (12) are arranged in a rectangular shape.

6. The secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: A spring groove (19) for accommodating spring 1 (12) is provided between the lower template (9) and the top plate assembly (10).

7. A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: The elastic mechanism includes a limiting pin (24), a second spring (25), and a top cover (26). The bottom of the top plate assembly (10) is provided with a sliding groove for the slider (16) to slide laterally. The inner side of the slider (16) is provided with an inner cavity (27). The second spring (25) and the top cover (26) are installed in the inner cavity (27) from the inside to the outside. The top cover (26) is recessed in the middle and rests on the side of the ejector plate (13). The limiting pin (24) is installed in the top cover (26). One end of the limiting pin (24) passes through the top cover (26) laterally and is threadedly connected to the inner cavity (27).

8. A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: The lower mold core (4) is equipped with a lower forming seat (23) that inserts into the mold cavity (3). The forming top block (8) is set on the upper end of the lower forming seat (23). The forming top block (8) and the lower forming seat (23) are spliced ​​together to assist in the deep cavity forming of the product. The connecting rod (7) is set through the lower forming seat (23).

9. A secondary segmented ejection die-casting mold for preventing deformation of deep cavity parts according to claim 1, characterized in that: Limit screws (28) are provided between the ejector plate (13) and the lower template (9).

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