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
During the casting production, we use
one set of patterns to produce many same sand molds, such as 100
sets. Then we pour the liquid metal into these sand molds, then
finally we could produce 100 pieces of
metal castings. So, the sand molds are the products made
by patterns, and the castings are the products made by molds.
Resin Sand Mold
Some sand molds are recyclable such as
green sand and resin sand, some are not, such as shell molds, which
is why the shell molding castings are more expensive.