Die-casting die

Abstract

The die-casting die comprises a die body, the die body is provided with a caulking groove for arranging a sealing ring, the caulking groove is provided with a corner, correspondingly, the sealing ring is provided with a bent part at the corner, and the die is characterized in that an anti-falling piece capable of preventing the sealing ring from falling off is arranged at the position, close to the caulking groove, of the die body; the outer edge of the anti-falling piece is provided with an inverted buckle structure, and the anti-falling piece can be in compression joint fit with the bent part of the sealing ring in the state that the anti-falling piece is embedded into the corresponding position. The anti-falling piece is used as an independent part relative to the die, the mode that a sealing groove needs to be machined in the corner of the die is replaced, the corresponding effect of buckling the sealing strip is achieved, the inverted buckle structure of the anti-falling piece can be matched with the bent part in the caulking groove in a pressing-connection mode, the bent part at the corner is buckled to the corner, and therefore the sealing strip is prevented from falling off. The phenomenon that the bent part is separated from the corner is avoided, and the sealing performance of the mold is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to a mold that can prevent the sealing ring from falling off. Background Technology

[0002] In die-casting mold design, a clearance is incorporated between the fixed mold frame and the fixed mold core to prevent mold collisions during mold closing. However, this clearance allows outside air to remain within the clearance and enter the mold cavity after mold closing. If air is present in the die-casting mold cavity, the molten metal cannot completely fill the cavity, resulting in defects such as porosity and oxide inclusions in the product. Currently, a sealing strip is commonly used between the fixed mold core and the fixed mold frame in die-casting processes. While this method blocks the airflow path from the clearance to the cavity, the sealing strip is prone to falling out during use, reducing the sealing effect and thus affecting product quality.

[0003] To address the aforementioned issues, the prior art includes a Chinese utility model patent, "A Sealing Structure for a Mold," with patent number ZL202021803302.X (publication number CN213195566U), which discloses a sealing groove structure. This sealing groove is located on the contact surface between the fixed mold frame and the fixed mold core, with a horizontal bottom. The sealing strip is then fitted into the sealing groove, which effectively holds the sealing strip in place, preventing it from falling out during use and providing a better sealing effect.

[0004] While the aforementioned patent solves the problem of sealing strip detachment on the horizontal surface inside the mold, the mold interior, in addition to the flat surface, also has some groove structures 1'. These groove structures 1' are used to avoid the installation and movement of the slider, mold core, or mold platen. A certain height difference is formed between the bottom 11' of these groove structures 1' and the parting surface 2' of the fixed mold frame, such as... Figure 1 The diagram shows the specific structure of the fixed mold frame. At the junction of the side wall of the groove structure 1' and the parting surface 2' of the fixed mold frame, there is a protruding corner 3'. This corner 3' is approximately a right angle. The special features here are: First, the sealing strip not only protrudes to form a bend, but the bend cannot make close contact with the corner 3', resulting in poor sealing. Second, the sealing groove structure of the mold is difficult to set at the corner 3'. Therefore, it is difficult to achieve a tight connection of the sealing strip by "fastening the sealing strip". Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a die-casting mold with better sealing performance, especially to effectively seal the sealing ring at the corner, in view of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: The die-casting mold includes a mold body, the mold body is provided with a groove for setting a sealing ring, the groove has a corner, and correspondingly, the sealing ring forms a bent part at the corner, characterized in that: the mold body is provided with an anti-detachment member near the groove to prevent the sealing ring from falling off, the outer edge of the anti-detachment member has an undercut structure, and when the anti-detachment member is embedded in the corresponding position, it can press and cooperate with the bent part of the sealing ring.

[0007] To ensure the stability of the anti-detachment component within the mold body, the mold body further includes a mounting portion communicating with the recess near the recess. The anti-detachment component is integrally embedded into the bent portion of the sealing ring via this mounting portion, forming a press-fit. Correspondingly, the outer edge of the anti-detachment component protrudes at least partially into the recess, forming the undercut structure. This design, which involves integrally embedding the anti-detachment component into the mounting portion, ensures that the component is flush with the parting surface of the mold frame when embedded, thus preventing collision between the anti-detachment component and the parting surface of the fixed mold frame during mold closing.

[0008] Because existing molds, especially those located at corners, cannot accommodate sealing grooves like those found in existing molds, the applicant uses the "anti-detachment component" as an independent part to fulfill the function of "locking in the sealing ring." From the perspective of simplifying the structure for "locking in the sealing ring," preferably, the contact surface between the inverted structure and the sealing ring is an inclined surface. This inclined surface gradually slopes from the bottom wall of the groove towards the opening, moving closer to the sealing ring. Thus, when the anti-detachment component moves downwards, its inclined surface presses the sealing ring against the bottom wall of the groove, ensuring that the sealing ring, especially its bent portion, is locked within the groove, preventing it from detaching.

[0009] To further enhance the stability of the sealing ring within the groove, the anti-detachment component has an "L"-shaped cross-section, comprising a first anti-detachment section and a second anti-detachment section. A first connecting hole for external fastener connection is provided on either the first or second anti-detachment section. Correspondingly, a second connecting hole communicating with the first connecting hole is provided on the mounting portion. When an external force is applied, causing the fastener to pass through the first connecting hole and connect to the second connecting hole, the abutment surface forces the bent portion of the sealing ring to press against the bottom wall of the groove. The "L"-shaped anti-detachment component is better suited for corners, and the method of applying a downward actuating force to the anti-detachment component using fasteners, allowing it to pass through the first connecting hole and connect to the second connecting hole, increases the stability of the sealing ring within the groove.

[0010] To prevent the sealing ring from popping out from the corner, the sealing ring further includes a first sealing section corresponding to the first anti-detachment section and a second sealing section corresponding to the second anti-detachment section, with the first and second sealing sections connecting to form a bent portion. Traditional one-piece sealing rings, after bending at the corner, have a force resisting deformation and are prone to popping out of the groove. The split design of this technical solution, where the bent portion is formed by the connection of the first and second sealing sections, eliminates the force resisting bending deformation at the corner, resulting in more stable installation.

[0011] Furthermore, the connection ends of the first sealing section and the second sealing section are respectively formed with an inclination angle α, and α = 45°. Choosing α as 45° can more stably achieve the connection between the first sealing section and the second sealing section, and form a more closely fitting fit with the "L"-shaped anti-detachment component.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the anti-detachment component is used as an independent part relative to the mold, replacing the method of machining a sealing groove at the corner of the mold, so as to play the corresponding role of "fastening the sealing strip". Furthermore, the inverted buckle structure of the anti-detachment component can be pressed and matched with the bent part in the groove, so that the bent part at the corner is fastened at the corner, avoiding the phenomenon of the bent part detaching from the corner, thus enhancing the sealing performance of the mold. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the fixed mold frame in the background technology of this utility model;

[0014] Figure 2 This is a schematic diagram and a partial enlarged view of the assembly relationship between the sealing ring and the anti-detachment component in the mold body according to an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram and a partial enlarged view showing the positions of the grooves and recesses within the mold body according to an embodiment of the present invention;

[0016] Figure 4 This is a cross-sectional view of the mold body according to an embodiment of the present utility model;

[0017] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0018] Figure 6 This is a schematic diagram of the anti-detachment component according to an embodiment of the present utility model;

[0019] Figure 7 This is a schematic diagram of the sealing ring structure according to an embodiment of the present invention;

[0020] Figure 8 for Figure 7 A magnified view of a portion of the image. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 2-8 The diagram shows the preferred embodiment of this utility model. This die-casting mold is mainly used for die-casting parts of specific shapes. After the mold is closed, air remains in the assembly gap between the mold core and the mold frame. During die-casting, the molten aluminum mixes with this air, creating porosity and affecting product quality. Generally, a sealing strip is placed between the mold frame and the mold core to prevent air from entering the cavity. However, ordinary sealing strips, when placed at corners on the fixed mold frame, are prone to falling off or popping out of the assembly groove. Therefore, providing a die-casting mold with good sealing performance and effective sealing of the corresponding corner sealing ring would be beneficial. The following will provide a detailed structural description of this die-casting mold:

[0023] See Figures 2 to 5 The die casting mold includes a mold body 1. The mold body 1 is provided with a groove 3 for the sealing ring 2. The groove 3 has a corner 31. Correspondingly, the sealing ring 2 has a bent portion 20 at the corner 31. The mold body 1 is provided with an anti-detachment member 4 near the groove 3 to prevent the sealing ring 2 from falling off. The outer edge of the anti-detachment member 4 has an undercut structure 41. When the anti-detachment member 4 is inserted into the corresponding position, it can be pressed and engaged with the bent portion 20 of the sealing ring 2.

[0024] Specifically, the mold body 1 has a mounting portion 5 near the groove 3, which communicates with the groove 3. The anti-detachment component 4 is integrally embedded in the bent portion 20 of the sealing ring 2 by means of the mounting portion 5, and is press-fitted. Correspondingly, the outer edge of the anti-detachment component 4 protrudes at least partially into the groove 3 to form an undercut structure 41. The anti-detachment component 4 is integrally embedded in the mounting portion 5 so that it is flush with the parting surface of the mold frame when embedded. This avoids the anti-detachment component from colliding with the parting surface of the fixed mold frame when the mold is closed, ensuring the stability of the anti-detachment component 4 within the mold body 1.

[0025] In addition to ensuring stable installation, the design of the anti-detachment component 4 also needs to consider ease of installation. Since existing molds, especially those at the corner 31, cannot accommodate existing sealing grooves, the applicant uses the anti-detachment component 4 as an independent part to "secure the sealing ring 2." From the perspective of simplifying the structure for securing the sealing ring 2, the contact surface 411 between the inverted structure 41 and the sealing ring is an inclined surface. This inclined surface gradually slopes from the bottom wall 32 of the groove 3 towards the opening 33, moving closer to the sealing ring 2. Thus, when the anti-detachment component 4 moves downwards, its inclined surface presses the sealing ring 2 against the bottom wall 32 of the groove, ensuring that the sealing ring 2, especially its bent portion 20, is secured within the groove 3, preventing it from detaching.

[0026] See Figure 5 and Figure 6 The anti-detachment component 4 has an "L"-shaped cross-section, including a first anti-detachment section 42 and a second anti-detachment section 43. A first connecting hole 44 for external fastener connection is provided on either the first or second anti-detachment section 42. In this embodiment, the first connecting hole 44 is located on the first anti-detachment section 42. Correspondingly, the mounting part 5 has a second connecting hole 51 that communicates with the first connecting hole 44. When an external force is applied to actuate the fastener through the first connecting hole 44 and connect it to the second connecting hole 51, the contact surface 411 can force the bent portion 20 of the sealing ring 2 to press against the bottom wall 32 of the groove 3. The "L"-shaped anti-detachment component 4 is more suitable for corners 31, and the method of applying a downward actuating force to the anti-detachment component 4 using fasteners, allowing it to pass through the first connecting hole 44 and connect to the second connecting hole 51, increases the stability of the sealing ring 2 within the groove 3.

[0027] Finally, see Figure 7 and Figure 8 The sealing ring 2 includes a first sealing section 21 corresponding to the first anti-detachment section 42 and a second sealing section 22 corresponding to the second anti-detachment section 43. The first sealing section 21 and the second sealing section 22 are connected to form a bent portion 20. In traditional one-piece design, the sealing ring has a force that resists deformation after bending at the corner 31, making it easy to pop out of the corner 31 of the groove 3. The bent portion 20 of this technical solution is a split design formed by the connection of the first sealing section 21 and the second sealing section 22, so that the bent portion 20 does not have a force that resists bending deformation at the corner, making the installation more stable and preventing the sealing ring 2 from popping out of the corner 31. The connection ends of the first sealing section 21 and the second sealing section 22 are respectively formed with an inclination angle α, and α = 45°, which can more stably realize the connection between the first sealing section 21 and the second sealing section 22 and form a more fitting fit with the "L"-shaped anti-detachment component 4.

[0028] The working principle of this die-casting mold is as follows: Before using the mold, the user sets an anti-detachment component 4 in the mounting part 5. The inverted structure 41 of the anti-detachment component 4 can be pressed and engaged with the bent part 20 in the groove 3. When installing the anti-detachment component 4, the fastener passes through the first connecting hole 44 and the second connecting hole 51 and applies a force to the anti-detachment component 4 pointing towards the bottom of the groove 3. While tightening the anti-detachment component 4, the applied force forces the bent part 20 of the sealing ring 2 to press against the bottom wall 32 of the groove 3 through the contact surface 411, which avoids the phenomenon of the bent part 20 detaching from the corner 31 and enhances the sealing performance of the die-casting mold.

Claims

1. A die-casting die comprising a die body (1) provided with an embedding groove (3) for a sealing ring (2), the embedding groove (3) having a corner (31) and the sealing ring (2) being correspondingly provided with a bent portion (20) at the corner (31), characterized in that: The mold body (1) is provided with an anti-falling piece (4) capable of preventing the seal ring (2) from falling off adjacent to the embedding groove (3), and the outer edge of the anti-falling piece (4) is provided with a reverse buckle structure (41), and in the state of embedding the anti-falling piece (4) into the corresponding position, the anti-falling piece (4) can be in pressure bonding with the bending part (20) of the seal ring (2).

2. The die casting mold according to claim 1, characterized in that: The mold body (1) is provided with an installation part (5) communicating with the embedding groove (3) adjacent to the embedding groove (3), and the anti-falling piece (4) is integrally embedded in the pressure bonding with the bending part (20) of the seal ring (2) by means of the installation part (5), and correspondingly, the outer edge of the anti-falling piece (4) at least partially protrudes into the embedding groove (3) to form the reverse buckle structure (41).

3. The die casting mold according to claim 2, characterized in that: The reverse buckle structure (41) and the abutting surface (411) of the seal ring (2) are inclined surfaces, which gradually incline towards the seal ring (2) from the groove bottom wall (32) of the embedding groove (3) to the direction where the groove opening (33) is located.

4. The die casting mold according to claim 3, characterized in that: The cross section of the anti-falling piece (4) is "L" shaped, including a first anti-falling section (42) and a second anti-falling section (43), and the first anti-falling section (42) or the second anti-falling section (43) is provided with a first connecting hole (44) for connecting external fasteners, and correspondingly, the installation part (5) is provided with a second connecting hole (51) penetrating the first connecting hole (44), and in the state that the fastener is actuated by external force and passes through the first connecting hole (44) and is connected to the second connecting hole (51), the abutting surface (411) can force the bending part (20) of the seal ring (2) to be pressure bonded to the groove bottom wall (32) of the embedding groove (3).

5. The die casting mold according to claim 4, characterized in that: The seal ring (2) includes a first seal section (21) corresponding to the first anti-falling section (42) and a second seal section (22) corresponding to the second anti-falling section (43), and the first seal section (21) and the second seal section (22) are connected to form a bending part (20).

6. The die casting mold according to claim 5, characterized in that: The connecting ends of the first seal section (21) and the second seal section (22) are respectively provided with an inclined angle α, and α=45°.

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