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Vulcanizer buying advice


#1

hi all,

I’m considering buying a vulcanizer and would appreciate the sage
advice from those here as to favorite products and why. I’ve looked
some up in the tool catalogs I have on hand, and frankly, they all
look the same to me.

Thank you!
Elaine Luther


#2
    I'm considering buying a vulcanizer and would appreciate the
sage advice from those here as to favorite products and why.  I've
looked some up in the tool catalogs I have on hand, and frankly,
they all look the same to me. 

My only consideration is that each platen has its own temperature
control so you can calibrate both. This is important if you’ll be
using No-Shrink Pink rubber.

Jeffrey Everett


#3

Elaine, Have you considered just using RTV rubber rather than
vulcanizer?? Then you don’t need to spend the $$ on the equipment.
RTV materials are great. I can’t understand why folks still get
into vulcanized molds. Just my preference and opinion.

We have a vulcanizer that we really don’t use but when we teach, we
do show folks how to vulcanize but then show them RTV molds and as
far as I know, they all go to RTV materials.

Is there a reason you other jewelers use vulcanized verses RTV
molds. Just curious…

John Dach


#4
    My only consideration is that each platen has its own
temperature control so you can calibrate both. This is important if
you'll be using No-Shrink Pink rubber. 

We have a new in box Grobet #22.550 vulcanizer that has independent
thermostats for each platen that we are selling at a reduced price.
Grobet’s list price on it is $385.00. We will sell this one for $310
plus shipping. USA destinations only. Ground shipping to the east
coast is about $30. This is a 110 volt unit and has the full
manufacturer warrantee. We are an authorized Grobet dealer. If
interested contact us off list at tim@A2ZMetalsmithSupply.com

Tim A2Z Metalsmith Supply Inc 5151 S Federal Blvd Unit I-9 Littleton
CO 80123 720 283-7200 www.A2ZMetalsmithSupply.com


#5
    Is there a reason you other jewelers use vulcanized verses RTV
molds. Just curious...... 

I have a fair bit of experience with both kinds of molds, and there
are very good reasons to use vulcanized. The true rubber is much
much stronger than RTV. If you are going to use a mold a lot the
danger of damage is much less with real rubber. When cutting a mold
that has undercuts and complexity, the ease with which RTV tears can
ruin a mold easily. Vulcanized rubber is more flexible than RTV, so
a mold that is fairly involved is easier to work around details.
When cutting a mold for a basket type mounting it is necessary to
pull the rubber away from the mounting in order to get the cut line
where it needs to be to allow the wax to cleanly come out of the
mold. When doing this with RTV the likelihood of the material
tearing is very high. I cut molds in a very specific pattern to make
removal of the wax as easy as possible (reduces distortion), and the
tendency of RTV to tear in front of your cut adds an element of
unpredictablity. RTV is great when you need to mold a piece of wax,
or cannot use heat. It is also easier to avoid shrinkage, which is a
factor if you are copying an existing piece rather that something
that was designed to mold in the first place.

Spike Cornelius
Portland, Or.
RC ArtMetal