Class rings can be easy or difficult to make and reproduce, depending
on the design. The models of such rings can be created using a cad/cam
system with a 4 axis milling machine. The top and bottom of the ring
are usually created as seperate parts depending on the depth and
complexity of the design.The type of design that is associated with
this process of model work and molding is rings that have very deep
letters and design .
If the design is deep and the lettering is deep with fine lines (
depth measured between the fine raised letters and lines)Then you are
most definitely looking at making the 2 parts in 2 metal molds .
These type of molds are injected on special machines developed
strictly for metal molds and cost about $4000 ( this is the cost of
the machine)The model and mold cost is not determinable without
seeing the artwork.
If you want to make a design that can be reproduced in a rubber mold,
then make sure to make the lettering and design shallow and with wider
lines and letters as wide as possible on the surface.The depth and
thinlettering are what is difficult to get out of a rubber mold for
many school,military and college rings.
If the top of the ring has a bezel for a stone as well as
lettering,then a model may not be neccessary to create as it can be
cad/cam or pantographed directly into a plate of aluminium ( flat
aluminium) then a back plate is created to fit the aluminium mold so
that when the top and back plate are assembled and a wax is injected
into the mold, the interior of the top is now hollowed out by the back
plate to reduce weight. In many cases, the rings are made in 2 parts
and usually done in metal molds. The shank which often times has deep
detail in the cavities is done in a metal mold, unless the detail is
not deep and complex.
It is easier to produce a school ring in a rubber mold system than
metal molds if certain parameters are carefully considered from the
We use both methods in our general production of such rings. If you
are trying to achieve the same results as seen in rings made by
Balfour company and Jostens, realize that these rings are done usually
with very deep lettering and are always done in metal molds.
I hope this is helpful in your projects.
Daniel Grandi http://www.racecarjewelry.com Tel: 401-461-7803
from 10 am to 5 pm eastern standard time We do casting & finishing in
gold, silver, bronze , brass and pewter for people in the trade.