Foil flushing box, foil drying box and foil cleaning production line

The utility model relates to a foil flushing box, a foil drying box and a foil cleaning production line. The foil flushing box, the foil drying box and the foil cleaning production line respectively include a guide roller device. Each guide roller device comprises two or more foil guide rollers used for guiding foil. The rotation axes of all the foil guide rollers are mutually parallel. Each foil guide roller comprises at least two adjacently arranged first tension rollers and second tension rollers, and the foil is wound around the first tension rollers and the second tension rollers in an S shape. Either the first tension rollers or the second tension rollers are provided with guide roller surfaces used for making contact with one side surface of the foil in a wrap angle mode, and the first tension rollers or the second tension rollers are provided with guide roller surfaces used for making contact with the other side surface of the foil in a wrap angle mode. During use, the foil can be wound around every two adjacent foil rollers in the S shape and form a certain wrap angle on the foil guide rollers, so that the transverse tension of the foil between every two foil guide rollers is increased; besides, the suspension length of the foil can be reduced, so that the stability of foil tension is kept, and wrinkling and backfin of the foil are reduced or avoided.