(57) [Task] A non-open type barrel is used, even a long bolt class is capable of being
plated without problem, further electric resistance is decreased in the plating from
a small workpiece to a large workpiece and the amount of CO2 discharged is capable of being decreased.
[Means for Resolution] A barrel apparatus for barrel plating in which a non-open type
barrel is used, a workpiece is accommodated in the barrel and is immersed in a plating
liquid, a negative electrode that is arranged within the barrel and a positive electrode
that is arranged in the plating liquid are electrically connected and electroplating
is performed while the barrel is rotated about a center shaft, includes a negative
electrode 11 arranged at a position that is in contact with a workpiece W inside the
barrel, and a positive electrode 12 is arranged at a position that is not in contact
with the workpiece inside the barrel, wherein the barrel has a form that is substantially
a cylinder or substantially a polygonal cylinder and a ratio between the diameter
and the length thereof is in a range of 1:0.7 to 1:1.
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