A method for making sand particle foundry mold members. Sand particles are
coated with an aqueous dispersion of a suitable binder material such as a
gelatin gel. The moist gelatin coated particles are gravity fed into a
pattern box for the mold member and subjected to multi-axis vibration to
pack the sand in the pattern box. The moist sand is then heated with radio
frequency energy to promote binder flow to the corners of the particles,
and air flow is initiated to transport water from the mass of particles to
harden the mass of particles into the mold member.
