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Injection wax ripples


#1

I have just started making wax models from RTV molds, using Castaldo
blue injection wax, and a high percentage of my wax copies have
small ripples in the surface (reminds me of an old fashioned
washboard, or a fingerprint). Any idea as to why this is happening,
and what the cure is?

thanks,
Stan


#2
    I have just started making wax models from RTV molds, using
Castaldo blue injection wax, and a high percentage of my wax copies
have small ripples in the surface (reminds me of an old fashioned
washboard, or a fingerprint). Any idea as to why this is
happening, and what the cure is? 

Try warming up the wax a bit more and/or warming your molds and fill
faster if possible. Sounds like the wax is “hardening” a bit then
the “new” bit of wax comes along and there is a slight indent where
these sections of wax meet.

JD


#3

Dear stan, Ripples like that are usually the result of a cold mold.
That is, a mold that hasn’t warmed up yet and is chilling the wax.
It usually goes away after a few uses.

Michael Knight


#4
I have just started making wax models from RTV molds, using
Castaldo blue injection wax, and a high percentage of my wax copies
have small ripples in the surface (reminds me of an old fashioned
washboard, or a fingerprint). Any idea as to why this is happening,
and what the cure is? 

Stan, Your wax is chilling to fast in the mold. Try increasing the
temperature of the wax or mold. Also you can try a higher pressure to
get the wax into the mold faster.

Ken Kotoski
MPG Repair
www.mpgrepair.com
1-877-262-2185


#5

Your wax is old. My grandfather is 88 years old and he has the same
kind of ripples your talking about!. But seriously, it’s caused by
either your wax being too cool or your molds being too cool. Try a
temp of 150-160 degrees F for the wax and then shoot a couple. Keep
in mind that the more times you shoot a wax into a mold, the more
the mold begins to warm up too. If the heat on your wax is too hot,
it will form air bubble in it I believe and you sure don’t want
that. I’ve also tried leaving my molds on top of the injector while
the wax is heating up to pre-heat them. Good luck