Die-casting die with precision breaking structure of vertical face feeding gate

Abstract

The utility model relates to a kind of precision breaking structure's die casting die of application facade feeding gate, including upper mould frame and lower mould frame, upper mould core and lower mould core are installed between upper mould frame and lower mould frame, the middle part of lower end of upper mould core is provided with forming insert, the upper end of the lower mould frame is slidably installed with a slider around lower mould core, the inner side of each slider is fixed with a core-pulling block, the upper end of the slider located in left side is installed with split cone, the upper part of upper mould frame is set with barrel above split cone, the left side of forming insert and the two sides of front and back between the outlet of barrel and the lower end of upper mould core are all provided with pouring runner, the upper end of part core-pulling block is close to the edge of forming face and is provided with facade feeding gate, the middle part of facade feeding gate is provided with stress convex strip.The utility model sets stress convex strip in the middle part of facade feeding gate, so stress concentration groove will be formed at material head, using stress concentration principle, material head can be broken along stress concentration groove position when removing.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, and in particular to a die casting mold that uses a precision fracture structure for the vertical feed gate. Background Technology

[0002] In the die-casting production process, the design of the mold's gate directly affects product quality and production efficiency. Currently, with conventional molds, the gate fracture location is unclear when removing the sprue, easily leading to excessive gate residue after removal. This not only affects the product's appearance precision but also requires additional machining processes to handle the residue, resulting in longer production cycles, increased processing costs, and severely restricting the efficiency and economy of die-casting production. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a die casting mold with a precision fracture structure of vertical feed gate. By optimizing the gate structure design, a smooth fracture surface is achieved when the material head is removed, reducing subsequent processing steps.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A die-casting mold with a precision fracture structure for a vertical feed gate 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 mold frame and the lower mold frame. A mold cavity is provided between the upper mold core and the lower mold core. A forming insert inserted into the mold cavity is provided at the lower center of the upper mold core. A slider is slidably installed on the upper end of the lower mold frame, located in all directions (front, back, left, and right) of the lower mold core. A core-pulling block is fixed inside each slider. The four core-pulling blocks surround the forming insert. The sides of the core are equipped with core-pulling cylinders that correspond one-to-one with the sliders. The upper end of the slider on the left side is equipped with a flow divider cone. The upper part of the upper mold frame is fitted with a material cylinder above the flow divider cone. The lower end of the upper mold core is provided with a gating channel between the material cylinder outlet and the left side and the front and rear sides of the molding insert. The inner wall of the core-pulling block is the molding surface. Some of the core-pulling blocks have a vertical inlet gate that corresponds to the gating channel near the edge of the molding surface at the upper end. The cross-sectional area of ​​the vertical inlet gate gradually decreases from top to bottom. A stress protrusion is provided in the middle of the vertical inlet gate.

[0005] As a supplement to the technical solution described in this utility model, a mold foot is installed on both sides of the lower end of the lower mold frame, and a top plate assembly is installed between the two mold feet. The top plate assembly is provided with a push rod that is vertically inserted into the mold cavity.

[0006] As a supplement to the technical solution described in this utility model, the casting channel includes a main channel and branch channels. A U-shaped main channel is provided at the outlet of the barrel. Several branch channels are provided between the inner side of the main channel and the molding insert. One end of each branch channel is connected to the mold cavity through a corresponding vertical inlet gate.

[0007] As a supplement to the technical solution described in this utility model, the width of the stress protrusion is 1-3mm.

[0008] As a supplement to the technical solution described in this utility model, the cross-sectional shape of the stress protrusion is V-shaped or trapezoidal.

[0009] Beneficial Effects: This utility model relates to a die-casting mold employing a precision fracture structure for a vertical feed gate. A stress-enhancing ridge is set in the middle of the vertical feed gate, creating a stress concentration groove at the material head. Utilizing the principle of stress concentration, the material head fractures along the stress concentration groove during removal, solving the problem of unclear fracture location during gate removal in traditional designs. This ensures a smooth fracture surface and effectively improves the issue of excessive gate residue. Due to the smooth fracture surface and low residue height, the workload and time of subsequent machining are greatly reduced, shortening the production cycle and lowering production costs. The stress concentration groove formed by the V-shaped or trapezoidal stress-enhancing ridge at the material head can more accurately guide stress concentration, making the fracture location clearer and the fracture surface smoother. The overall mold structure of this utility model is compact, with coordinated components, enabling stable and efficient completion of the die-casting production process, improving production efficiency and product qualification rate. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the lower mold frame and the lower mold core described in this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the upper mold frame and the upper mold core described in this utility model;

[0013] Figure 4 This is a schematic diagram of the slider with vertical feed gate described in this utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the waste material and product inside the casting channel of this utility model;

[0015] Figure 6 This is a cross-sectional view of the waste material inside the casting channel described in this utility model;

[0016] Figure 7 This is a utility model Figure 6A magnified view of a portion of point A in the middle.

[0017] Illustration: 1. Upper mold frame, 2. Upper mold core, 3. Mold cavity, 4. Lower mold core, 5. Lower mold frame, 6. Core pulling block, 7. Runner cone, 8. Barrel, 9. Slider, 10. Core pulling cylinder, 11. Molding insert, 12. Mold foot, 13. Top plate assembly, 14. Ejector rod, 15. Gating channel, 16. Molding surface, 17. Vertical inlet gate, 18. Stress relief strip, 19. Main runner, 20. Runner, 21. Product, 22. Stress concentration groove. Detailed Implementation

[0018] 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.

[0019] The present invention relates to a die-casting mold employing a precision fracture structure for a vertical feed gate, such as... Figure 1-7 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 forming insert 11, inserted into the mold cavity 3, is provided at the lower center of the lower mold core 2. A slider 9 is slidably installed on the upper end of the lower mold frame 5, located in all directions around the lower mold core 4. A core-pulling block 6 is fixed inside each slider 9, and the four core-pulling blocks 6 surround the forming insert 11. Core-pulling cylinders 10, corresponding to the sliders 9, are installed on the sides of the lower mold frame 5. A flow divider cone 7 is installed on the upper end of the slider 9 on the left side. A material cylinder 8 is sleeved on the upper part of the upper mold frame 1 above the flow divider cone 7. A gating channel 15 is provided between the lower end of the upper mold core 2 at the outlet of the material cylinder 8 and the left side and front and rear sides of the molding insert 11. The inner wall of the core-pulling block 6 is the molding surface 16. A vertical surface inlet gate 17 corresponding to the gating channel 15 is provided on the upper end of the core-pulling block 6 near the edge of the molding surface 16. The cross-sectional area of ​​the vertical surface inlet gate 17 gradually decreases from top to bottom. A stress protrusion 18 is provided in the middle of the vertical surface inlet gate 17.

[0020] The lower mold frame 5 has a mold foot 12 installed on both sides of its lower end, and a top plate assembly 13 is installed between the two mold feet 12. The top plate assembly 13 is provided with a push rod 14 that is vertically inserted into the mold cavity 3. After the product is die-cast, the top plate assembly 13 controls the push rod 14 to push the product out of the mold cavity 3, which facilitates the removal and placement of the product.

[0021] The casting runner 15 includes a main runner 19 and branch runners 20. The outlet of the barrel 8 is provided with a U-shaped main runner 19. A number of branch runners 20 are provided between the inner side of the main runner 24 and the molding insert 11. One end of each branch runner 20 is connected to the mold cavity 3 through a corresponding vertical inlet gate 17. The U-shaped main runner 19 can make the molten metal flow evenly to each branch runner 20, and then enter the mold cavity 3 through the vertical inlet gate 17, ensuring the product molding quality.

[0022] The width of the stress protrusion 18 is 1-3mm. This width range has been verified through multiple tests and can effectively achieve stress concentration, ensuring that the material head breaks at this position.

[0023] The stress protrusion 18 has a V-shaped or trapezoidal cross-sectional shape. The stress concentration groove 22 formed by the V-shaped or trapezoidal stress protrusion 18 at the material head can more accurately guide stress concentration, making the fracture location clearer and the fracture surface smoother.

[0024] Working process: During die casting production, the core-pulling cylinder 10 first drives the slider 9 to close the core-pulling blocks 6, so that the forming insert 11, upper mold core 2, lower mold core 4, and the forming surfaces 16 of the four core-pulling blocks 6 cooperate to form a complete mold cavity 3. Molten metal is injected from the barrel 8, diverted through the U-shaped main channel 19 to each branch channel 20, and then enters the mold cavity 3 through the vertical inlet gate 17. After the molten metal cools and solidifies, the core-pulling cylinder 10 drives the slider 9 to separate the core-pulling blocks 6, and the top plate assembly 13 drives the ejector rod 14 to push the product out of the mold cavity 3. (Refer to...) Figure 6 and Figure 7 As shown, when removing the material head, since the vertical feed gate 17 is provided with a stress protrusion 18 in the middle, a stress concentration groove 22 will be formed at the material head. The stress is concentrated at this position through the stress concentration groove 22, causing the material head to break along the stress concentration groove 22, ensuring a flat fracture.

[0025] This invention features a stress-concentrating ridge 18 in the center of the vertical feed gate 17, creating a stress concentration groove 22 at the sprue head. Utilizing the principle of stress concentration, the sprue head breaks along this groove during removal, solving the problem of unclear breakage locations in traditional designs. This ensures a smooth fracture surface and effectively reduces excessive sprue residue. The smooth fracture and low residue height significantly reduce subsequent machining workload and time, shortening the production cycle and lowering production costs. The width and cross-sectional shape of the stress-concentrating ridge 18 are rationally designed to ensure stress concentration without hindering the flow of molten metal within the vertical feed gate 17, guaranteeing product molding quality. The overall mold structure is compact, with coordinated components, enabling stable and efficient completion of the die-casting process, improving production efficiency and product qualification rate.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The above provides a detailed description of a die-casting mold with a precision fracture structure for a vertical feed gate, as provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are 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 die-casting mold with a precision fracture structure for a vertical feed gate, 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: The upper mold core (2) has a forming insert (11) inserted into the mold cavity (3) at its lower center. The lower mold frame (5) has a slider (9) slidably installed on the front, back, left and right sides of the lower mold core (4). Each slider (9) has a core-pulling block (6) fixed inside. The four core-pulling blocks (6) surround the forming insert (11). The sides of the lower mold frame (5) are equipped with core-pulling cylinders (10) that correspond one-to-one with the sliders (9). The slider (9) on the left side has a flow divider cone (7) installed on its upper end. The upper part of the upper mold frame (1) is located at the flow divider cone. A material cylinder (8) is sleeved above (7). The lower end of the upper mold core (2) is located at the outlet of the material cylinder (8) and is provided with a gating channel (15) between the left side and the front and rear sides of the molding insert (11). The inner wall of the core-pulling block (6) is the molding surface (16). Some of the core-pulling blocks (6) have a vertical surface inlet gate (17) that corresponds to and cooperates with the gating channel (15) near the edge of the molding surface (16). The cross-sectional area of ​​the vertical surface inlet gate (17) gradually decreases from top to bottom. A stress protrusion (18) is provided in the middle of the vertical surface inlet gate (17).

2. A die-casting mold with a precision fracture structure for a vertical feed gate as described in claim 1, characterized in that: A mold foot (12) is installed on both sides of the lower end of the lower mold frame (5), and a top plate assembly (13) is installed between the two mold feet (12). The top plate assembly (13) is provided with a push rod (14) that is vertically inserted into the mold cavity (3).

3. A die-casting mold with a precision fracture structure for a vertical feed gate according to claim 1, characterized in that: The casting runner (15) includes a main runner (19) and branch runners (20). The outlet of the barrel (8) is provided with a U-shaped main runner (19). A number of branch runners (20) are provided between the inner side of the main runner (19) and the molding insert (11). One end of each branch runner (20) is connected to the mold cavity (3) through a corresponding vertical inlet gate (17).

4. A die-casting mold with a precision fracture structure for a vertical feed gate as described in claim 1, characterized in that: The width of the stress protrusion (18) is 1-3 mm.

5. A die-casting mold with a precision fracture structure for a vertical feed gate according to claim 1, characterized in that: The cross-sectional shape of the stress protrusion (18) is V-shaped or trapezoidal.

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