Pressure bag molding is
similar to the vacuum bag moldimg method
except that air pressure, usually 30 to
50 psi, is applied to a rubber bag, or
sheet that covers the laid up composite
to force out entrapped air and excess
resin. Pressurized steam may be used instead,
to accelerate the cure. Cores and inserts
can be used with the process, and undercuts
are practical, but only female and split
molds can be used to make items such as
tanks, containers, and wind turbine blades.
