Cold isostatic press superhigh pressure sealing device and manufacturing process of sealing ring of cold isostatic press superhigh pressure sealing device

Abstract

The invention discloses a cold isostatic press superhigh pressure sealing device. The cold isostatic press superhigh pressure sealing device comprises a sleeve, wherein a sealing cover is contained in the sleeve and is connected into the sleeve in an abutted mode, the lower end of the sealing cover is fixedly connected with a lower pressing plate through a bolt, an installation groove is formed between the lower portion of the sealing cover and the lower pressing plate, a sealing ring is arranged in the installation groove, an O-shaped circle is arranged inside the sealing ring, and the sealing ring is made of nylon, molybdenum disulfide, bronze powder and graphite. According to the cold isostatic press superhigh pressure sealing device and the manufacturing process of the sealing ring of the cold isostatic press superhigh pressure sealing device, through the modification of components and the component ratio of the sealing ring, the wear-resisting property of the sealing ring is improved, the friction coefficient of the sealing ring is lowered, the rebound resilience of the sealing ring is improved, the service life of the sealing ring is prolonged, the guide performance of the sealing ring is improved, and the sealing performance of the sealing device is further improved.

Description

technical field [0001] The invention relates to the field of molding machinery, in particular to an ultra-high pressure sealing device and a manufacturing process for a sealing ring of a cold isostatic pressing machine. Background technique [0002] Cold isostatic press is a new type of powder molding equipment, which is characterized by using ultra-high pressure liquid to form powder and obtain a uniform internal structure, which can improve the shortcomings of traditional molding processes such as uneven density and poor billet quality. Therefore, it is increasingly favored by powder metallurgy industries such as ceramics and magnetic materials. [0003] The cover of the cold precision press is subjected to ultra-high pressure liquid pressure during work, and will cause a small amount of floating displacement (about 1.5-3mm) on the upper cover. Therefore, the seal suitable for its working conditions must have at least the following characteristics: a. Low friction, good g...

AI Technical Summary

Problems solved by technology

[0005] 1. The price is very expensive. Generally, ultra-high pressure seals or sealing devices are specially made, especially for cold isostatic presses. Most of them are inconvenient to purchase and have a long cycle;

[0006] 2. The purchased standard sealing ring is generally difficult to adapt to the sealing of the ultra-high pressure environment, and its design is not specifically for the cold isostatic press, so the designer does not understand some special working environments and operating conditions of the cold isostatic press. For example, the working condition of the upper cover installed in this sealing structure;

[0007] 3. In the working conditions of the cold isostatic press, the service life is very short, it is inconvenient to disassemble when replacing, and there are extremely high precision requirements for the installation of the seal (such as groove size, etc.);

[0008] 4. The structure of the sealing ring or the sealing device itself is relatively complex and has certain precision requirements. Generally, users can only rely on purchasing from the manufacturer, and cannot manufacture and modify it by themselves.

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