What are the principles and applications of vacuum preloading equipment?

Vacuum preloading equipment is a commonly used equipment in industrial production. Its main principle is to reduce the molecular number and pressure of gas, place the workpiece in a low-pressure environment, and achieve compression, shaping, drying, degassing and other effects. This type of equipment is widely used in many industries, including manufacturing, food processing, electronics, and so on. Next, I will provide a detailed introduction to the principle and application of vacuum preloading equipment.

The principle of vacuum preloading equipment mainly includes the following aspects:

Principle of pressure difference: The vacuum preloading equipment extracts the gas from the container, causing a difference in pressure between the internal and external gases. The internal gas pressure is lower than the external pressure, which makes the membrane force of the workpiece stronger, enabling better contact with the mold and achieving better forming results.

Degassing principle: Vacuum preloading equipment can remove the gas or liquid attached to the surface of the workpiece, thereby preventing the gas or liquid from exerting pressure on the workpiece and affecting the forming effect.

Drying principle: The vacuum preloading equipment uses filtered air introduced in a low-pressure environment for drying treatment, evaporating the moisture on the workpiece to prevent its impact and improve the quality of the workpiece.

The application of vacuum preloading equipment is very extensive, and the following are several main application areas:

Plastic product production: Vacuum preloading equipment is widely used in the molding process of plastic products. For example, in the process of plastic injection molding, pre pressing equipment can effectively reduce the resistance of plastic flow, making it easier for plastic to fill the mold, thereby improving the quality of product molding and production efficiency.

Composite material manufacturing: Vacuum preloading equipment plays a very important role in composite material manufacturing. In the manufacturing process of composite materials, preloading equipment can compact resin and fiber materials by reducing pressure and extracting air, improving the mechanical properties of the materials, and effectively removing bubbles and impurities inside the workpiece, thereby improving the quality of the product.

Electronic device manufacturing: Vacuum preloading equipment has important applications in electronic device manufacturing. For example, in semiconductor manufacturing, preloading equipment can provide good contact between semiconductor materials and substrates, improving the accuracy and performance of devices. At the same time, preloading equipment can also be used in electronic packaging processes to ensure the quality of packaging materials and improve packaging efficiency by reducing pressure and degassing.

Food processing industry: Vacuum preloading equipment is often used in vacuum packaging and vacuum degassing processes in the food processing industry. In vacuum packaging, the preloading equipment can remove oxygen from the bag, prevent food oxidation and spoilage, and extend the shelf life of the food. At the same time, the preloading equipment can also remove gases and moisture from food through degassing treatment, maintaining the taste and quality of the food.