Cold isostatic pressing die with high sealing performance

Abstract

The utility model relates to the technical field of dies, in particular to a cold isostatic pressing die with high sealing performance, which comprises a die main body, the upper end of the die main body is in threaded connection with a die upper cover, the lower surface of the die upper cover is provided with a boss part, and the upper end face of the die main body is connected with a second sealing ring in an embedded mode. According to the utility model, the mold upper cover and the mold main body are in threaded connection through the matching of the outer pipe teeth and the inner pipe teeth to maintain thread locking force, the thread locking force extrudes the first sealing ring and the second sealing ring, the annular groove limits the second sealing ring, the boss part extrudes the second sealing ring, and the mold upper cover and the mold main body are in threaded connection through the matching of the outer pipe teeth and the inner pipe teeth. And the first sealing ring is limited, the sealing performance between the mold body and the mold upper cover is guaranteed, hose clamp hooping is omitted, the sealing effect is guaranteed, liquid is prevented from entering a cavity, the step of opening the mold upper cover is omitted, and feeding and discharging of the mold are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of moulds, in particular to a cold isostatic pressing mould with high sealing performance. Background Technique

[0002] The cold isostatic pressing mould is a key component in the cold isostatic pressing process. This process is a forming method that uses high-pressure fluid to apply isotropic pressure to the material placed in a flexible mould. The cold isostatic pressing mould usually consists of a flexible jacket and a rigid end cap. During the cold isostatic pressing process, the material is placed in the jacket of the mould, and then a liquid medium is injected around the mould through a pump to form a high-pressure environment and apply uniform pressure to the material. The material of the cold isostatic pressing mould needs to have good sealing performance and sufficient strength to withstand high pressure without cracking or deforming. Commonly used materials include rubber, polyurethane, silica gel, etc. The cold isostatic pressing mould is widely used in fields such as powder metallurgy, ceramics, food processing, and chemical product forming. It is particularly suitable for the production of products with complex shapes or requiring high-precision dimensional control. However, there are certain drawbacks in the use of the existing devices. For example, in the "A Cold Isostatic Pressing Ultra-Sealed Forming Device" recorded in the publication number CN209289811U, which includes a controlled forming master mould, a mould rubber sleeve is arranged inside the controlled forming master mould, a diversion hole is arranged on the mould rubber sleeve, a powder isolation plate is arranged inside the mould rubber sleeve, a first upper cover plate and a first lower cover plate are respectively arranged at the top and bottom of the powder isolation plate, a second upper cover plate is arranged at the top of the first upper cover plate, a second lower cover plate is arranged at the bottom of the first lower cover plate, an upper sealing plate is arranged at the bottom of the second upper cover plate, a lower sealing plate is arranged at the top of the second lower cover plate, the second upper cover plate and the upper sealing plate are connected by an upper fastening strip, the second lower cover plate and the lower sealing plate are connected by a lower fastening strip, and a mould cavity is formed between the first upper cover plate, the first lower cover plate and the powder isolation plate;

[0003] The above device can perform pressure forming on the mould from multiple directions including up and down and the side. The formed workpiece is more uniform and has good sealing performance, effectively preventing the leakage of graphite powder. However, the above device is fixed by multiple locking strips, which will affect the loading and unloading speed of the device while ensuring the sealing performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cold isostatic pressing mould with high sealing performance to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A cold isostatic pressing mold with high sealing performance, including a mold body. The upper end of the mold body is threadedly connected with an upper mold cover. The lower surface of the upper mold cover is provided with a boss portion. The upper end surface of the mold body is embedded with a second sealing ring. The outer surface of the boss portion is nested with a first sealing ring. The upper mold cover and the mold body are sealed by the first sealing ring and the second sealing ring in cooperation. The lower surface of the boss portion is in close contact with the second sealing ring. The lower surface of the first sealing ring is in close contact with the upper surface of the mold body.

[0007] Furthermore, a cylindrical cavity is formed on the upper surface of the mold body, and the diameter of the cavity is 5 - 600 mm.

[0008] Furthermore, external pipe thread is provided on the outer surface of the upper mold cover.

[0009] Furthermore, internal pipe thread is provided on the inner surface of the cavity. The upper mold cover is threadedly connected with the mold body through the cooperation of the external pipe thread and the internal pipe thread.

[0010] Furthermore, an annular groove is formed at the upper end of the mold body, and the lower surface of the second sealing ring is in close contact with the bottom surface of the annular groove.

[0011] Furthermore, the bottom diameter of the mold body is 9 - 1200 mm, and the mold body is made of polyurethane material.

[0012] Furthermore, a hexagonal column is fixedly connected to the upper surface of the upper mold cover, and the cross-section of the hexagonal column is a regular hexagon.

[0013] Preferably, the height of the hexagonal column is 20 - 40 mm.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] By providing the upper mold cover, the upper mold cover and the mold body are connected through the cooperation of the external pipe thread and the internal pipe thread to maintain the thread locking force. The thread locking force presses the first sealing ring and the second sealing ring. The annular groove limits the second sealing ring, and the boss portion presses the second sealing ring and limits the first sealing ring, ensuring the sealing performance between the mold body and the upper mold cover, eliminating the need for a hose clamp to tighten and ensuring the sealing effect, preventing liquid from entering the cavity, reducing the steps of opening the upper mold cover, and facilitating the loading and unloading of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a partial sectional structural schematic diagram of the present utility model;

[0017] Figure 2 is a half-sectional structural schematic diagram of the present utility model;

[0018] Figure 3 It is a schematic diagram of the split structure of the present utility model.

[0019] In the figure: 1. Mold body; 2. External pipe thread; 3. First sealing ring; 4. Mold upper cover; 5. Boss part; 6. Second sealing ring; 7. Hexagonal column; 8. Annular groove; 9. Internal pipe thread. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 3 , in the embodiment of the present utility model, a cold isostatic pressing mold with high sealing performance includes a mold body 1. The upper end of the mold body 1 is threadedly connected with a mold upper cover 4. The lower surface of the mold upper cover 4 is provided with a boss part 5. The upper end surface of the mold body 1 is embedded and connected with a second sealing ring 6. The outer surface of the boss part 5 is nested and connected with a first sealing ring 3. The mold upper cover 4 and the mold body 1 are sealed by the first sealing ring 3 in cooperation with the second sealing ring 6. The lower surface of the boss part 5 is in close contact with the second sealing ring 6, and the lower surface of the first sealing ring 3 is in close contact with the upper surface of the mold body 1. The outer surface of the mold upper cover 4 is provided with an external pipe thread 2.

[0022] Specifically, when in use, materials are added into the cavity, and then the mold upper cover 4 is manually rotated to make the mold upper cover 4 threadedly connected with the mold body 1. The first sealing ring 3 and the second sealing ring 6 seal the connection position, eliminating the need for a hose clamp to tighten and ensuring the sealing effect, preventing liquid from entering the cavity, reducing the steps of opening the mold upper cover 4, and facilitating the feeding and discharging of the mold.

[0023] Embodiment 1

[0024] As Figures 1 - 3 shown, the inner surface of the cavity is provided with an internal pipe thread 9. The mold upper cover 4 is threadedly connected with the mold body 1 through the cooperation of the external pipe thread 2 and the internal pipe thread 9. An annular groove 8 is opened at the upper end of the mold body 1. The lower surface of the second sealing ring 6 is in close contact with the bottom surface of the annular groove 8.

[0025] In this embodiment, the upper die cover 4 and the die body 1 are connected by an external pipe thread 2 mating with an internal pipe thread 9 to maintain the thread locking force. The thread locking force squeezes the first sealing ring 3 and the second sealing ring 6 to ensure the sealing performance between the die body 1 and the upper die cover 4. The annular groove 8 positions the second sealing ring 6, and the boss portion 5 squeezes the second sealing ring 6 and positions the first sealing ring 3.

[0026] Embodiment 2

[0027] On the basis of Embodiment 1, in order to remedy the problem that it is inconvenient to rotate the upper die cover 4 in Embodiment 1.

[0028] As Figures 1 - 3 shown, a cylindrical cavity is provided on the upper surface of the die body 1. The diameter of the cavity is 5 - 600 mm, the bottom diameter of the die body 1 is 9 - 1200 mm, and the die body 1 is made of polyurethane material. A hexagonal column 7 is fixedly connected to the upper surface of the upper die cover 4. The cross-section of the hexagonal column 7 is a regular hexagon, and the height of the hexagonal column 7 is 20 - 40 mm.

[0029] In this embodiment, the polyurethane material is selected for the die material with a hardness of HSA60. On the one hand, while realizing the pressure conduction, it ensures that the overall shape of the cylindrical ingot will not deform, and the hexagonal column 7 increases the strength of the upper die cover 4. A wrench can be used to cooperate with the hexagonal column 7 to rotate the upper die cover 4, so that the upper die cover 4 and the die body 1 are effectively screwed together.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cold isostatic pressing mold with high sealing performance, comprising a mold body (1), characterized in that: The upper end of the mold body (1) is threadedly connected to a mold cover (4), and the lower surface of the mold cover (4) is provided with a boss portion (5). The upper end surface of the mold body (1) is embedded with a No. 2 sealing ring (6), and the outer surface of the boss portion (5) is nested with a No. 1 sealing ring (3). The mold cover (4) and the mold body (1) are sealed by the No. 1 sealing ring (3) and the No. 2 sealing ring (6). The lower surface of the boss portion (5) is in close contact with the No. 2 sealing ring (6), and the lower surface of the No. 1 sealing ring (3) is in close contact with the upper surface of the mold body (1).

2. A cold isostatic pressing mold with high sealing performance according to claim 1, characterized in that: The upper surface of the mold body (1) is provided with a cylindrical cavity, and the diameter of the cavity is 5-600 mm.

3. A cold isostatic pressing mold with high sealing performance according to claim 2, characterized in that: The outer surface of the mold upper cover (4) is provided with an external tube thread (2).

4. A cold isostatic pressing mold with high sealing performance according to claim 3, characterized in that: The inner surface of the cavity is provided with an inner tube thread (9), and the mold upper cover (4) is threadedly connected to the mold body (1) through the outer tube thread (2) and the inner tube thread (9).

5. The cold isostatic pressing mold with high sealing performance according to claim 1, characterized in that: An annular groove (8) is provided at the upper end of the mold body (1), and the lower surface of the second sealing ring (6) is in close contact with the bottom surface of the annular groove (8).

6. The cold isostatic pressing mold with high sealing performance according to claim 1, characterized in that: The bottom diameter of the mold body (1) is 9-1200 mm, and the mold body (1) is made of polyurethane material.

7. The cold isostatic pressing mold with high sealing performance according to claim 1, characterized in that: A hexagonal column (7) is fixedly connected to the upper surface of the mold upper cover (4), and the cross section of the hexagonal column (7) is a regular hexagon.

8. The cold isostatic pressing mold with high sealing performance according to claim 7, characterized in that: The height of the hexagonal column (7) is 20-40 mm.

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