The press cage applies pressure to the fruit bunches, causing the oil to be squeezed out from the mesocarp. The solid components of the fruit, such as the fibers and the kernel, remain inside the press cage, while the extracted oil flows out.

The perforated plates in the press cage allow the oil to pass through while retaining the solids. The oil, along with water and other impurities, is collected and further processed to remove contaminants and moisture.

The design of the press cage with its perforated plates helps prevent blockages caused by fibrous materials. The gaps between the plates allow the oil to flow freely, while the fibers and other solid residues remain inside the cage.

The press cage is designed to maximize oil extraction efficiency. By applying controlled pressure, the press cage ensures that a significant amount of oil is extracted from the fruit, contributing to higher oil yields.