What is the principle of Trickle Varnishing Machine?
According to the principle of Impregnation, activated resin is trickled in a thin jet on to the rotating preheated winding. The resin immediately gets heated and its viscosity is reduced. Due to the rotary motion of the winding the resin gets distributed evenly inside the winding without any drain loss. The heated winding accelerates the gelling and curing of the resin.
Types of the machines
Basically varnishing machine can be specified in two parts depending on the method of varnishing. One is Trickle Varnishing Machine and other is Vacuum Pressure impregnation plant.
Models available in Trickle Varnishing Machine
According to the size of the job to be impregnated and production rate, three models have been established such as Indexing table type varnishing machine, Batch type Horizontal table type varnishing machine and Conveyorized system for varnishing
What types of the job can be varnished?
Considering all types of the varnishing machine, all winding parts can be varnished such as Stators, Rotors, Coils, Transformer stack windings, small electronics transformers, etc.
What are the advantages of this machine?
Trickle impregnation process is especially characterized by its low energy cost due to a very short cycle time compared to Dip varnishing or the Vacuum impregnation. Compared to the Dip and bake varnishing method, which uses varnishes containing 50 to 55% solvents and the impregnation cycle of 8 hrs to 24 hrs. Trickle impregnation cycle times are substantially low to the tune of 20 min. to 40 min. Hence it is quite evident that trickle impregnation process offers the most cost economical answer to the impregnation process.