What are the key technologies of hot press in plywood production

Plywood, as an important building material, cannot be produced without the crucial role of a hot press machine. A hot press machine uses a high-temperature and high-pressure environment to allow the adhesive to fully diffuse, penetrate, and solidify inside the board, thereby improving the bonding quality and physical properties of the board. The following are several key technologies of hot press machines in plywood production:

1、 Fast closure and high-precision positioning technology

The rapid closing technology of hot press can significantly shorten the production cycle and improve production efficiency. Modern hot press machines use accumulators or advanced hydraulic systems to achieve rapid closure of the hot press plate, ensuring that the required pressure is reached in a short period of time. Meanwhile, high-precision positioning technology can ensure the accurate position of the hot press plate when closed, ensuring the dimensional accuracy of the plywood.

2、 Intelligent control system

Intelligent control system is one of the key technologies for hot press machines. By controlling the core through PLC and combining it with analog input modules, precise control of key parameters such as temperature, pressure, and time during the hot pressing process can be achieved. The intelligent control system can also achieve functions such as data storage management, remote online monitoring, and fault diagnosis, providing strong support for production management.

3、 Heating and cooling system

The heating system is one of the core components of the hot press, usually using steam medium or heat conduction oil for heating. The heating system can ensure that the hot press plate reaches the required temperature during operation, allowing the adhesive to fully cure. At the same time, the cooling system can quickly reduce the temperature of the board after the hot pressing is completed, preventing the adhesive from damaging the fiber structure at high temperatures and ensuring the physical properties of the plywood.

4、 Non pad loading and unloading technology

The non pad loading and unloading technology can save the equipment and site for pad return, and reduce the labor intensity of operators. At the same time, the non pad loading and unloading technology can also reduce the hot pressing time and heat consumption, and increase the output of the hot press machine. Hot press machines using non pad loading and unloading technology are usually equipped with automatic loading and unloading systems to achieve multi station motion control throughout the entire process of entering and exiting the board.

The key technologies of the hot press in plywood production include rapid closure and high-precision positioning technology, intelligent control system, heating and cooling system, and non pad loading and unloading technology. The application of these technologies can significantly improve the production efficiency and quality of plywood, providing strong support for the development of the plywood industry.