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Taiyuan Hongyu Machinery Equipment Co., Ltd.: What is isostatic pressing technology? What is its principle?

Source: Time:2023-04-10 17:06:32 views:

Taiyuan Hongyu Machinery Equipment Co., Ltd. isostatic pressing technology - cold isostatic pressing equipment

Taiyuan Hongyu Machinery Equipment Co., Ltd. isostatic pressing technology - cold isostatic pressing equipment


There are two kinds of cold isostatic pressing into plastic: wet bag method and dry bag method. The structure of the corresponding isostatic press is also different. General layout drawing of cold isostatic press


1. Isostatic pressing by wet bag method


The powder is loaded, directly hit the liquid pressure medium, and contact with the liquid. Hence the call wet bag method. This method allows arbitrary changes in the shape and size of the plastic envelope. The products are very flexible. Suitable for small-scale production. Every time it is necessary to carry out bagging and unloading operations, the production efficiency is not high, and large-scale production cannot be carried out continuously.


2. Isostatic pressing by dry bag method


The rubber bag is placed inside the cylinder first. After not taking out the powder during work, the powder is loaded into another molded plastic bag. Put in a pressurized rubber bag and do not come into contact with liquid. Hence the name of the thousand bag method. This method allows continuous operation by opening the upper cover. Charging from the hopper. Then cover the upper lid and apply pressure into acceptance. When discharging. Open the upper cover. Push the blank out of the top through the bottom stick. Short and suitable for batch production. But the product specifications are limited. Because the pressurized plastic mold cannot be replaced frequently. Due to the heavy use of the main wet bag method. Therefore, the following focuses on the wet bag structure.


3. Ultra-high pressure vessel


Ultra-high pressure vessels are the main equipment that is or other items of the workshop. It must have sufficient strength and reliable sealing. The structure of the container cylinder block. Threaded structure and frame structure are often used.


Frame type cold isostatic press threaded structure: the cylinder block is a crucible-shaped cylinder with an opening on the upper side, for safety and reliability. Reinforced steel hoops (hot sleeve and steel cylinder) are often installed outside to form a double-layer cylinder structure. The upper mouth of the cylinder barrel is connected and sealed with a threaded plug head. This structure is simpler to manufacture. However, the thread is easily damaged and the safety and reliability are poor. Less productive work. For ease of operation. Some are designed as open thread structure, after the plug head is loaded, it rotates 45',  there is a hydraulic pressing device at the upper end.


Now the frame winding frame and container body structure is mainly adopted: the cylinder block is a cylinder, made of high-strength steel. Or wound with high-strength steel ribbon, the upper and lower plugs in the simplified body are movable, unthreaded connection. The axial force of the cylinder block is borne by the frame. This avoids the stress concentration of the thread structure, and works safely and reliably. For the case of large cylinder diameter and high pressure, it is more superior, but the investment is higher.


4 Ultra-high pressure pump and hydraulic system


The ultra-high pressure multiplier injects high-pressure liquid into the vessel. It is achieved through high-pressure pumps and corresponding pipes and valves. High-pressure pumps include (generally driven by the motor pulley to push the plunger to reciprocate), (by a large-area piston cylinder to push a small-area plunger high-pressure cylinder) and so on.

Taiyuan Hongyu Machinery Equipment Co., Ltd. Taiyuan cold isostatic press manufacturers will analyze for you: the scope of use and characteristics of cold isostatic presses


Then dry bag cold isostatic press is powder forming ultra-high pressure hydraulic equipment, the working object is powder, currently on the market there are the following forms of cold isostatic press:


1. Single media cold isostatic press


The hydraulic transmission and pressurized working medium of this type of isostatic press are made of minerals, and the working medium contaminated by powder will seriously affect the normal operation of the hydraulic system. Reduce the service life of hydraulic pumps (valves).


2. Dual-media cold isostatic press with familiar device


The application of this isostatic press is mainly how to reduce the pollution of powder and improve the reliability of the system work, which is a problem faced by equipment manufacturers and users.


3. Three-media cold isostatic press with isolation device


This type is mainly to solve the serious consequences caused by the damage of the isolation device, and to solve the adverse effects caused by the oil and water channeling after the isolation device is damaged, but there are still drawbacks that the isolation device occupies the working cylinder space, and the problem of increasing the investment in equipment by the user has not been solved.


4. Dual-media cold isostatic press without isolation device


Cold isostatic presses like this are aimed at solving a series of problems such as powder contamination and the economic loss caused by the occupation of working cylinder space after installing the isolation device, and the damage of the isolation device. Finally this dual-media cold isostatic press was launched, which is a better solution.


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