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Vulcanized mold making


#1

Dear wonderful jewelers with bountiful stock wisdom,
Can a piece made out of pewter or tin withstand the heat and pressure
of a vulcanized molding process?

sincerely,
Daniel Saltsburg @ingot
==>hot metal,is so cool!<==


#2

Pewter, no - tin , probably.
Ringold’s Jewelers since 1908 9865 Bustleton Ave/ Phila, PA 19115
215-671-8190 Fax: 215-969-1803 Ringold@IX.netcom.com
Http://home.aol.com/REGALITE
Manufacturing / Mining / Product Development


#3

Robert wrote:

Pewter, no - tin , probably

Robert, why wouldn’t pewter work? I thought most modern pewter’s were
primarily tin. As I understand it , many jewelers use tin or pewter to
build masters for rubbermolding. It is soft, forges, and does not work
harden. However, I would not do delicate work in tin and then try and heat
and pressure vulcanize, unless it was flat.

One thing to note if using tin or its alloys to make masters for
rubbermolding. Make sure you clean your files carefully or use separate
files. If tin contaminates the surface of sterling (not sure about gold)
and then is soldered, you’ve got a real mess on your hands.

Kenneth Gastineau
@Kenneth_Gastineau1


#4

Dear wonderful jewelers with bountiful stock wisdom,
Can a piece made out of pewter or tin withstand the heat and pressure
of a vulcanized molding process?

It’s possible. If you have to, be very gentle. Crank down on the warmed
rubber slowly.
Best bet is to use the room temperature vulcanized or silicon molds. It’s
even possible to make molds from wax models and recover the models when done.

http://www.knight-hub.com/manmtndense/bhh3.htm
e-mail: @Bruce_Holmgrain
snail mail: POB 7072, McLean, VA 22106-7972, U.S.A.


#5

Pewter, no - tin , probably.

Ringold’s Jewelers since 1908 9865 Bustleton Ave/ Phila, PA 19115

Same thing if is “fine Pewter”. Some “pewters” have fairly high lead
contents (much cheaper) and most all “pewters” have one or more alloys
added (antimony being one commonly found).

John

John Dach and Cynthia Thomas
Maiden Metals
a div. of True greatness may be found in the
MidLife Crisis Enterprises humblest places.
PO BX 44
Philo, CA 95466
707-895-2635(phone/fax)
@John_Cynthia_MidLife


#6

Dear wonderful jewelers with bountiful stock wisdom,
Can a piece made out of pewter or tin withstand the heat and pressure
of a vulcanized molding process?

sincerely,
Daniel Saltsburg ingot@hooked.net
==>hot metal,is so cool!<==

Yes. Pewter melts around 500-600 Deg. F (depending on the alloy mix) and
most vulcanizing is done at 300 350 Deg. F. As an alternative, what about
using RTV (room temp vulcanizing) rubbers. I use a couple of different
ones for different uses. There are a number of RTV’s that can take the
heat of a direct pour of pewter. Jewelry suppliers often have them, also
numerous suppliers of molding rubber materials all over the US.

John

John Dach and Cynthia Thomas
Maiden Metals
a div. of True greatness may be found in the
MidLife Crisis Enterprises humblest places.
PO BX 44
Philo, CA 95466
707-895-2635(phone/fax)
@John_Cynthia_MidLife