A sealing punch for high vacuum die casting

Abstract

The utility model relates to the technical field of high vacuum die casting discloses a kind of sealing punch for high vacuum die casting, including punch body, the inside front end of punch body is fixedly installed with cooling water core by inside connection thread, the inside one side of punch body is penetrated and is equipped with cooling water return hole, the inside rear end of punch body is equipped with cooling water inlet channel, the inside rear end of punch body is also provided with pressure buffer and aluminium liquid barrier area, the outside of punch body is equipped with beryllium copper ring installation groove.This kind of sealing punch for high vacuum die casting, by setting support spring between punch body and beryllium copper ring body, effectively prevent aluminium liquid leakage, this kind of self-adapting sealing structure significantly improves the sealing stability and reliability of punch, prolongs the service life of beryllium copper ring body, reduces equipment failure rate and maintenance cost, solves the problem that traditional fixed sealing structure is easy to fail.

Description

Technical Field

[0001] This utility model relates to the technical field of high vacuum die casting, and in particular to a sealing punch for high vacuum die casting. Background Technology

[0002] In existing high-vacuum die-casting technology, the punch is a crucial component of the die-casting equipment, primarily used to propel molten aluminum into the mold cavity under high temperature, high pressure, and high speed conditions. Currently, commonly used punches are mostly made of ordinary steel or alloy materials and equipped with simple sealing structures, such as rubber or metal sealing rings, to prevent aluminum leakage. Simultaneously, to cope with the high-temperature environment, some punches are also designed with cooling channels to reduce operating temperature and extend service life. These technologies have been widely applied in traditional die-casting processes, providing fundamental guarantees for die-casting production.

[0003] However, existing punches still suffer from numerous problems. First, due to insufficient high-temperature resistance and corrosion resistance of the materials, punches are prone to wear or deformation under prolonged high-speed and high-pressure operation, leading to seal failure and affecting the quality of die-cast parts. Second, traditional cooling structures have limited efficiency and cannot effectively cope with the extreme temperature environment in high-vacuum die-casting processes, further exacerbating punch wear. Furthermore, existing sealing structures are mostly fixed designs, making it difficult to adapt to changes in the injection cylinder gap, easily leading to aluminum leakage, increasing equipment failure rates and maintenance costs. These problems not only limit the service life of the punches but also reduce the yield rate of die-cast products, urgently requiring solutions through technological improvements. Utility Model Content

[0004] In view of the problems of insufficient high temperature resistance and corrosion resistance of punches in the prior art, limited cooling structure efficiency, and difficulty in adapting the sealing structure to changes in gap, which lead to easy wear and deformation of punches, sealing failure, and leakage of molten aluminum, thereby reducing the service life of punches and the yield of die-cast products, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a sealing punch for high vacuum die casting. The purpose is to solve the problems of insufficient high temperature resistance and corrosion resistance of the material, limited cooling structure efficiency, and difficulty in adapting the sealing structure to changes in the gap in the existing punches. These problems lead to easy wear and deformation of the punch, sealing failure, and leakage of molten aluminum, thereby reducing the service life of the punch and the pass rate of die-cast products.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a sealing punch for high vacuum die casting, comprising a punch body, a cooling water core fixedly installed on the inner front end of the punch body via an internal connecting thread, a cooling water return hole penetrating through one side of the inner side of the punch body, a cooling water inlet channel being provided on the inner rear end of the punch body, a pressure buffer and aluminum liquid blocking area being provided on the inner rear end of the punch body, a beryllium copper ring mounting groove being provided on the outer side of the punch body, a beryllium copper ring body being engaged with the inside of the beryllium copper ring mounting groove, and a support spring being installed between the beryllium copper ring body and the beryllium copper ring mounting groove.

[0007] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, the punch body is made of H13 mold steel.

[0008] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, the beryllium copper ring body is made of wear-resistant beryllium copper material.

[0009] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, the outer surface of the front end of the punch body is provided with an injection rod connecting thread, and the punch body and the injection rod are fixedly connected to each other through the injection rod connecting thread.

[0010] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, the punch body has an injection rod internal cooling mounting hole on the inner side of its front end, and the cooling water core is installed inside the injection rod internal cooling mounting hole.

[0011] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, wherein the outer end of the cooling water inlet channel is connected to an external cooling water source.

[0012] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, an O-ring is installed between the cooling water core and the cooling water return hole.

[0013] As a preferred embodiment of the sealing punch for high vacuum die casting described in this utility model, the beryllium copper ring body has an opening gap on its surface.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model incorporates a support spring between the punch body and the beryllium copper ring body. During use, the support spring continuously provides preload, ensuring that the beryllium copper ring body and the injection cylinder remain in close contact. It can also automatically adapt to gap changes caused by thermal expansion and contraction or wear, effectively preventing aluminum liquid leakage. This self-adaptive sealing structure significantly improves the sealing stability and reliability of the punch, extends the service life of the beryllium copper ring body, reduces equipment failure rate and maintenance costs, and solves the problem of easy failure of traditional fixed sealing structures.

[0015] 2. This utility model features a four-sided distributed cooling water core inside the punch, and a pressure buffer and aluminum liquid barrier area at the front end of the punch. During use, the cooling water core evenly reduces the working temperature of the punch, preventing material fatigue or deformation caused by high temperature. At the same time, the pressure buffer and aluminum liquid barrier area can effectively mitigate the impact of high-speed aluminum liquid on the punch body, prevent aluminum liquid from intruding into the sealed area, and reduce mechanical damage and corrosion. This integrated cooling and protection design significantly improves the high temperature resistance and impact resistance of the punch, extends its overall service life, and improves the pass rate of die-cast products. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of a sealing punch for high vacuum die casting according to the present invention; Figure 2 This is a schematic diagram of the structure of the beryllium copper ring body in a sealing punch for high vacuum die casting according to this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Punch body; 2. Injection rod internal cooling mounting hole; 3. Injection rod connecting thread; 4. Cooling water core; 5. Internal connecting thread; 6. Beryllium copper ring mounting groove; 7. O-ring; 8. Support spring; 9. Cooling water return hole; 10. Pressure buffer and aluminum liquid barrier area; 11. Cooling water inlet channel; 12. Beryllium copper ring body; 13. Beryllium copper ring opening gap. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0019] Reference Figure 1This is the first embodiment of the present invention, which provides a sealing punch for high vacuum die casting. The sealing punch for high vacuum die casting includes a punch body 1. A cooling water core 4 is fixedly installed on the inner front end of the punch body 1 through an internal connecting thread 5. A cooling water return hole 9 is opened through one side of the inner side of the punch body 1. A cooling water inlet channel 11 is opened on the inner rear end of the punch body 1. A pressure buffer and aluminum liquid blocking area 10 is also provided on the inner rear end of the punch body 1.

[0020] The punch body 1 is made of H13 mold steel.

[0021] The outer surface of the front end of the punch body 1 is provided with an injection rod connecting thread 3, and the punch body 1 is fixedly connected to the injection rod through the injection rod connecting thread 3.

[0022] The inner side of the front end of the punch body 1 is provided with an injection rod internal cooling mounting hole 2, and the cooling water core 4 is installed inside the injection rod internal cooling mounting hole 2.

[0023] The outer end of the cooling water inlet channel 11 is connected to an external cooling water source.

[0024] An O-ring 7 is installed between the cooling water core 4 and the cooling water return hole 9.

[0025] During use, cooling water enters the punch body 1 from an external cooling water source through the cooling water inlet channel 11, and then flows into the cooling water core 4. The distributed cooling structure around the punch evenly reduces the working temperature, preventing material fatigue or deformation caused by high temperature. After completing heat exchange, the cooling water is discharged through the cooling water return hole 9, forming a complete cooling cycle. At the same time, the pressure buffer and aluminum liquid barrier area 10 set at the front end of the punch effectively alleviates the impact of high-speed aluminum liquid on the punch body 1, prevents aluminum liquid from intruding into the sealed area, and reduces mechanical damage and corrosion. The O-ring 7 provides a sealing guarantee between the cooling water core 4 and the cooling water return hole 9 to ensure that the cooling system does not leak. The injection rod is fastened to the punch body 1 through the injection rod connecting thread 3, and further assists in cooling through the internal cooling mounting hole 2 of the injection rod. This integrated cooling and protection design greatly improves the high temperature resistance and impact resistance of the punch, extends the overall service life, and improves the qualification rate of die-cast products. Example

[0026] Reference Figures 1-2 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a beryllium copper ring mounting groove 6 is provided on the outer side of the punch body 1, a beryllium copper ring body 12 is engaged and connected inside the beryllium copper ring mounting groove 6, and a support spring 8 is installed between the beryllium copper ring body 12 and the beryllium copper ring mounting groove 6.

[0027] The beryllium copper ring body 12 is made of wear-resistant beryllium copper.

[0028] The surface of the beryllium copper ring body 12 is provided with a beryllium copper ring opening gap 13.

[0029] During use, the beryllium copper ring body 12, under the preload of the support spring 8, fits tightly against the inner wall of the injection cylinder, forming an effective seal. When the punch operates under high temperature and high pressure, and the beryllium copper ring body 12 wears due to thermal expansion and contraction or long-term use, the support spring 8 can automatically compensate for the gap changes, ensuring that the beryllium copper ring body 12 always maintains good contact with the injection cylinder and preventing aluminum liquid leakage. The opening gap design on the surface of the beryllium copper ring body 12 allows it to expand freely when heated, avoiding deformation or damage caused by thermal stress. This adaptive sealing structure not only improves the sealing stability and reliability, but also significantly extends the service life of the beryllium copper ring body 12, reduces equipment failure rate and maintenance costs, and effectively solves the problem of easy failure of traditional fixed sealing structures.

[0030] The remaining structure is the same as that in Example 1.

[0031] Based on embodiments 1-2, the working principle of this utility model is as follows: Cooling water enters the punch body 1 from an external cooling water source through the cooling water inlet channel 11, and then flows into the cooling water core 4. The cooling water core 4 adopts a surrounding distributed cooling structure to evenly distribute the cooling water, effectively reducing the working temperature of the punch and preventing material fatigue or deformation caused by high temperature. After completing heat exchange, the cooling water is discharged through the cooling water return hole 9, forming a complete cooling cycle and maintaining the punch at the ideal working temperature. The beryllium copper ring body 12 is tightly fitted to the inner wall of the injection cylinder by the preload of the support spring 8, forming an effective seal. When the punch works in a high temperature and high pressure environment, the beryllium copper ring body 12 will wear due to thermal expansion and contraction or long-term use. The support spring 8 can automatically compensate for gap changes, ensuring that the beryllium copper ring body 12 always maintains good contact with the injection cylinder, preventing aluminum liquid leakage; the pressure buffer and aluminum liquid barrier area 10 set at the front end of the punch effectively alleviates the impact of high-speed aluminum liquid on the punch body 1, prevents aluminum liquid from intruding into the sealing area, and reduces mechanical damage and corrosion; the injection rod is fastened to the punch body 1 through the injection rod connecting thread 3, and further assisted in cooling through the internal cooling mounting hole 2 of the injection rod; through the design of cooling cycle, adaptive sealing structure, pressure buffer and barrier, and injection rod connection, this high vacuum die casting sealing punch achieves stable operation of the punch under high temperature and high pressure environment, extends service life, and improves the qualification rate of die casting products.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sealing punch for high vacuum die casting, comprising a punch body (1), characterized in that: The inner front end of the punch body (1) is fixedly installed with a cooling water core (4) through an internal connecting thread (5). A cooling water return hole (9) is opened through one side of the inside of the punch body (1). A cooling water inlet channel (11) is opened at the inner rear end of the punch body (1). A pressure buffer and aluminum liquid blocking area (10) is also provided at the inner rear end of the punch body (1). A beryllium copper ring mounting groove (6) is opened on the outside of the punch body (1). A beryllium copper ring body (12) is engaged and connected inside the beryllium copper ring mounting groove (6). A support spring (8) is installed between the beryllium copper ring body (12) and the beryllium copper ring mounting groove (6).

2. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The punch body (1) is made of H13 mold steel.

3. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The beryllium copper ring body (12) is made of wear-resistant beryllium copper.

4. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The outer surface of the front end of the punch body (1) is provided with an injection rod connecting thread (3), and the punch body (1) and the injection rod are fixedly connected to each other through the injection rod connecting thread (3).

5. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The punch body (1) has an injection rod internal cooling mounting hole (2) on the inner side of its front end, and the cooling water core (4) is installed inside the injection rod internal cooling mounting hole (2).

6. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The outer end of the cooling water inlet channel (11) is connected to an external cooling water source.

7. A sealing punch for high vacuum die casting according to claim 1, characterized in that: An O-ring (7) is installed between the cooling water core (4) and the cooling water return hole (9).

8. A sealing punch for high vacuum die casting according to claim 1, characterized in that: The surface of the beryllium copper ring body (12) is provided with a beryllium copper ring opening gap (13).

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