A packaging cardboard box is an outer packaging container that is a collection and arrangement of packaging items that have already undergone various forms of packaging. The bottom of a regular cardboard or corrugated cardboard box is composed of four folding sheets (i.e. two inner folding sheets, also known as small sheets; two outer folding sheets, also known as large sheets or side sheets), and the folding sheets must be folded between the seals before sealing.

Sealing and packaging machinery refers to the machinery that seals the container after placing the product inside it. Container sealing can effectively protect products, prevent damage and deterioration during the shelf life due to packaging operations, and is also beneficial for the storage, transportation, and sales of packaged products. The quality of packaging largely depends on the sealing quality, and selecting a suitable sealing machine to achieve mechanical and automated operation of the sealing process is an important guarantee for improving the sealing quality.