I have been making rubber molds for over 30 years. When someone posts
their problem with a rubber mold, there are many variables.
If I said I had a rash and asked for opinions as to what was causing
it, there are too many causes for anyone to make an educated guess.
Making a silicone mold most likely will not be the answer if you do
not know why the wax is turning out thicker than the original. A
vulcanized mold does not increase the chances of having a thicker
Temperature of the vulcanizer, mold plates held correctly, pressure
wax is injected are some of the first considerations. Are there
noticeable parting lines? Flashing? Not tightening the platens
enough, not waiting for 10-12 minutes with light pressure and then
tightening down hard.
Without a picture of the mold and the wax, I can make guesses, one
of them might be right, but might not.
I think the guys at Zero D Products or Castaldo are available to
help trouble shoot problems if you call them.
Making mold after mold without knowing the problem reminds me of the
saying that the definition of insanity is when you do the same thing
over and over and expect the results to be different.
Richard Hart G.G.
Denver, Co. 80210