The process of immersing the dissolved toner into the printed paper and forming a fixed image is called "fixing" by means of pressure and hot melting.
Carbon powder adsorbed on paper is a tiny particle made of thermal resin and carbon powder. When the paper adsorbed with carbon powder passes through the cracks between two metal drums with relatively high clearance, the resin in the carbon powder dissolves and is pressed tightly on the paper together with carbon powder, thus forming a permanent image. At the same time, it is also completed. The whole process of laser printing. The melting temperature of toner is about 100 C. The temperature of hot roll is related to the speed of paper passing, generally between 150 and 180 C. The photoreceptor drum enters the next cycle by cleaning the residual powder and clearing the residual charge by illumination.
Laser printer adopts compound hot pressing method and uses "fixing module" to complete fixing. The working process of toner image fixing is as follows:
When the printing paper containing "toner image" enters between the heating roll and the pressure cot in the fixing device from the paper guide, the toner melts and immerses in the printing paper because the heating roll is heated by the heating lamp (185 C) and because of the pressure action of the pressure cot. The surface of heating roll is coated with polytetrafluoroethylene, which is not easy to adhere to toner. Some types of pressure cots also have a PTFE film on the surface, which is conducive to double-sided printing when the back toner does not adhere. The printing paper after being heated and fixed is separated from the separating claw and the heating roll, and is exported by the paper arranging wheel to complete the whole process of fixing.
Next time I'll share more information about printer, toner cartridge and hp 202a
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