Dressing die, cutting die and trimming die: they are different, but there is little difference. Knife die and trimming die are basically the same type, mainly the difference between dressing die and trimming die.

Reforming the mold: as the name implies, it is plastic and correction. Renovation means that unqualified products meet the requirements through shaping or correction, usually on the basis of previous molding, just like rough machining in front and fine machining in the back.