油ワニスの高周波加熱乾燥

概要

論文の詳細を見る
When drying oil varnishes for insulation, for example W-25 (containing more than 15% tung oil), are heated in the drying oven, there are large differences between polymerisation degrees at the surface and inner parts. The ratio of polymerisation degree at the surface to inner one increases with the rise of heat temperature in the range of 110-140℃. From experiment on the curing of thick pieces soaked in dense varnishes (more than 40% fixed) by radio heating, it has been ascertained to be able to decrease considerably the above mentioned differences and to keep the ratio fairly constant regardless of heat temperature. It seems that principal accounts on the results are due to suitable temperature distributions and speedy supplying of heat for evaporation of solvents. In conclusion, the radio heating is superior to all other methods on drying inner parts of oil varnishes for insulation. Many of pieces used in the experiment are cottons in layers and model coils.
信州大学工学部の論文
1953-03-30