What is egg tray-making machine?

egg tray-making machine

Egg trays are used as egg packaging to prevent damage to the eggs and facilitate transportation. An egg tray-making machine is a machine specially used to produce egg trays. So how are the egg trays produced?

What is an egg tray made of?

egg tray is a tool used to pack eggs. Its main function is to absorb shock and facilitate the transportation and sale of eggs. So what is the egg tray made of?