Kenneth Gastineau wrote:
Thanks for the polymer tips, I will try them. I have never tried RTV Molds.
Maybe I will give them a shot. I have a pressure washer that hooks to my
air compressor, will this work? Which is best, pressure washing or
ultrasonic, I have both.
The pressure washer will destroy the pattern, you’d have to tone it down
a bit, and warm to hot water works well. The ultrasonic leaves a pebble
like texture which can be very atractive, expecially if sandblasted and
plated with 24k. If you do some experimenting with both, you’ll discover
the many possibilities. The delicate patterns you create can be undercut
by the ultrasonic is you’re not careful.
Do you know of a good source for the photopolymer material. The only
sources I know of run about $22.00 for 7" X 7".
Sorry, I’ve been away from photopolymers for several years now. I do
remember getting some great prices from large print shop suppliers.
What type of brass should I use for injection molds? How thick?
I use aluminum for injection molds, it cuts more easily and is less
Do you have experience with the high pressure plastic injectors?
Yes, I have a Morgan Industries 55. I use about 4-5 tons of clamp
pressure and about 12,000 psi of injection pressure. I know it sounds
very high, but platic can be difficult to to move sometimes, especially
on filigree patterns. I got the injector used for $1000. A regular air
compressor at 125psi does the job nicely, the injector increases the
How much draft does one need to have on metal injection molds for wax
Wax can be tricky, especially on fine lettering and scrolls. I imagine
you’ll want to grind the cutters used for that type of pattern to about
12 degrees or more.
Thanks again for your help. When I get some experience under my belt I’ll
let you know what I think of the Pries cutter grinder. At this point my
problem is lack of knowledge and inexperience with engraving. There is a
listing for some pantographs in the current Engraver’s Journal. I think I
saw an ad in one of the internet classifieds for a Gorton 3D machine. If
your interested I’ll look them up for you.
I hope your used cutter grinder is adequate. I do some very tiny work,
and the cutter needs to be absolutely precise. I went to several shops
until I found one that could grind the cutters to my satisfaction. A
cutter tipped off to .1 or .15mm will break instantly if it’s not true.
No need to locate me a machine, I couldn’t afford it right now. Thanks
Handmade 18K and platinum gemstone jewelry. Fine die
and mold engraving. Diamond setting. Class rings/pins.
25 years experience in the jewelry trade. 515-469-6250