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Old 09-06-2012, 10:39 AM   #61
Smokey
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Default Re: ** Tech Week** Casting a metal nameplate for your car

cactus1- I havenít really noticed a shrinkage issue with the pewter I have used.

Alchemy Ė Good question, and yes, you have to buy it at a good price to weight ratio. For example that pitcher in my very first photo weighed 2 Ĺ lbs and I paid 20 bucks from an antique store in Mo on the way down to the Hamb drags. So in that case with pewter at $16 a lb. it worked out well. Also, if you are buying it online you will have the extra cost of shipping on top of the per lb price. Then there is always the factor that you find a pewter piece really cheap but it has a greater value as that object, I canít justify melting it down so I just resell it and use that money towards more (less valuable) pewter. One last thing on that, if you have an antique dealer/flea market person you know, tell them to keep an eye out for bent up worthless pewter pieces and offer them a like $5 a lb or less for the stuff, works well. That is usually the stuff pewter collectors don't want anyway.

Many places online to buy pewter ingots. One place that we use at work for other metals like pewter is http://www.rotometals.com/Pewter-Alloys-s/23.htm and they are fine to work with.

As far as the weight of the nameplate, probably a 1/3 of a lb. Just a guess without taking it back off the car and weighing it. Pewter is heavier than you might think. Not as much as lead but not far off.

Hope this is helpful.

Smokey
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Old 09-06-2012, 11:27 AM   #62
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Default Re: ** Tech Week** Casting a metal nameplate for your car

I used to buy pewter from a place called Iasco...
might try a search and see if they are still around??
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Old 09-09-2012, 12:27 PM   #63
Marty McFly
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Default Re: ** Tech Week** Casting a metal nameplate for your car

A perfect solution for a couple ideas I have had. Awesome tech, thank you!
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Old 09-09-2012, 07:06 PM   #64
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Great tech. Considering the low melting point ,how would pewter work using the lost wax process or a sacrificial styrofoam core?
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Old 09-09-2012, 10:17 PM   #65
Richard D
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Quote:
Originally Posted by cactus1 View Post
Very cool Smokey. Forgive me if I missed it but is there any shrinkage to account for with the pewter for something like the gauge surround?
Good question, aluminum does shrink when casting.
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Old 09-09-2012, 11:41 PM   #66
Smokey
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Glad that this has people thinking about how they could put this to use.

Will work good with the lost wax process but I wonder if you would have enough temp to do a good burnout with the Styrofoam method. I havenít tried so I canít say for sure.

I did a quick search that said the shrink rate for pewter is 1/32Ē per foot. Very insignificant for most things you cast, I would think.

Was out in Des Moines Saturday afternoon and stopped at the Brass Armadillo and I took this photo. It shows a shelf of so called pewter. Only the four darker pieces in the middle left are actually pewter. The rest are an aluminum alloy and worthless for what we want.
They incorrectly label them as pewter but it isnít hard to tell the difference.



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Old 09-10-2012, 02:00 PM   #67
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Default Re: ** Tech Week** Casting a metal nameplate for your car

haha now you can all have "streetrod" name plates on your cars
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Old 09-10-2012, 02:09 PM   #68
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Default Re: ** Tech Week** Casting a metal nameplate for your car

I made a car emblem in high school using aluminum and it came out great. I'll have to start looking for pweter now, thanks
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Old 09-10-2012, 05:35 PM   #69
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Default Re: ** Tech Week** Casting a metal nameplate for your car

super kool - great tech - jaxx
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Old 09-10-2012, 06:00 PM   #70
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Default Re: ** Tech Week** Casting a metal nameplate for your car

This is great!!
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Old 09-10-2012, 06:14 PM   #71
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Default Re: ** Tech Week** Casting a metal nameplate for your car

That is so cool! I want to melt something!
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Old 09-10-2012, 07:00 PM   #72
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Dang...this is the kind of tech I could pull off. Thanks, Smokey! (and none of grandma's priceless Jefferson cups will be sacrificed...promise)
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Old 09-23-2012, 09:44 AM   #73
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Great info. I started looking at the local thrift stores and already found 7 pcs priced from 50 cents to $1.50, so I can already see that this will work great!! In my learning curve I also bought some of the aluminum allow pcs, but the price of the education was cheap enough.
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Old 09-25-2012, 09:18 PM   #74
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Cool idea!
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Old 09-28-2012, 09:19 AM   #75
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Default Re: ** Tech Week** Casting a metal nameplate for your car

wow some on with access to a water jet can do some tricky stuff

also the high temp RTV sounds like a way to make 3D items..item put at the bottom of a shallow box with short sides then squeegee in silicone out of a caulking gun any air bubbles will be ez to removed

my parents were antique dealers who tossed plenty of smashed pewter pieces
dang it

okay. plate,anodize, powder coat the final piece?
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Old 11-01-2012, 01:38 PM   #76
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Default Re: ** Tech Week** Casting a metal nameplate for your car

can you use a coffee can to melt it in?

I was lazy and bought some off the internet....
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Old 12-29-2012, 10:05 PM   #77
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Anyone try this with hi temp silicon yet?
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Old 12-29-2012, 10:32 PM   #78
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Aluminum is too hot for Silicone, Pewter is OK.

I use Silicone from Smooth-On.
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Old 12-30-2012, 11:35 AM   #79
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Thanks for sharing. Speaking of Smokey, any worried a out gases released during melting?
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Old 12-30-2012, 08:09 PM   #80
Smokey
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Default Re: ** Tech Week** Casting a metal nameplate for your car

Havenít been on the board in months and I just happened to log on and saw this.
CW Ė You shouldnít have much to worry about with the metal out gassing unless you start reaching temps that cause the metal to start vaporizing and then you have other problems anyway. Even zinc is fairly safe if as long as you just melt it and donít vaporize it. Thatís where you start getting the dangers of metal fume fever. Never had it and donít want to. At work I sometimes cast prototype parts using Zamac and never had problems. Thatís a zinc, aluminum, magnesium and copper (alloy).

Unkl Ian has it right, Smooth On has a great selection of silicones and they will give you a lot of application possibilities. Something along this line that I saw on another site and have been messing with is silicone caulk in a tube. Take 100% silicone caulk 2 parts and 1 part cornstarch and mix together sets up rather quickly. The cornstarch will make the silicone cure clear through and not just on the surface. Vary the amount of corn starch and you can vary the cure time from 5 min to an hour or so. A little mineral spirits helps to thin it out from a paste form. I think you will find, like I did, that it is a cheap alternative in several situations to the more expensive offerings out there. Tail light lens mold anyone?
You just have to be willing to experiment a little and it is very useful stuff. I have even thinned it down to the point of shooting it through a syringe into some old prototype plastic injection molds and it worked quite well.

Well I hope this is of some use.

Smokey
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