Doctor blade (DB)
1. DB structure: There are two kinds of DB: one is metal powder doctor blade, the other is rubber powder doctor blade, rubber powder doctor blade structure: it is composed of iron frame and rubber sheet; metal powder doctor blade structure: It is composed of iron frame and steel sheet.
2.Working principle: Control the thickness of the toner layer on the magnetic roller(MR)/developing roller(DR) and assist the toner to be charged and charged.
3.Note:The DB cannot be pressed against each other and are prone to deformation;If the rubber powder DB is stored for too long, the rubber will become yellow and aging .
The metal powder DB should prevent extrusion and the steel sheet is deformed.