The cooling tunnel is used to cool down the heated petroleum jelly mixture quickly, which helps to solidify it into the desired shape and texture. The tunnel is typically made up of a conveyor belt system that moves the heated petroleum jelly mixture through a series of cooling chambers.
As the mixture moves through the cooling tunnel, it is exposed to cool air or water, which helps to rapidly reduce its temperature. This process solidifies the mixture and gives it the desired texture and consistency.
Cooling tunnels are essential in the production of petroleum jelly as they help to ensure the quality and consistency of the final product. They are used in various industries, including cosmetics, pharmaceuticals, and industrial applications.