Dandong Foundry  Casting Pattern and Sand Mold  During our
quotation, some clients may confused about the difference of
casting patterns and sand molds. Herein, we make a brief
introduction to their difference.  As for sand casting process,
the patterns are a type necessary and essential of tooling for
production. The Patterns have the similar shapes of the
castings, but normally they are assembled by several parts.  The
normal materials for casting patterns are wooden, resin
(plastic), aluminum, iron and alloy steel. The wooden patterns
are used for very small batch production, or just for making
samples. The resin patterns are not expensive, and have very
long work life time, so they could be used to batch production,
and especially be used for producing large castings. Aluminum
patterns are used for manual green sand casting process. Iron
patterns are used for automatic molding lines and shell molding
process. Alloy steel patterns are used permanent molding
process.  Aluminum Pattern  During the casting pr