Temperature for vacuforming?

Thank you Bick & Don I appreciate the advice.  I probably will avoid that and just use Rubber molds instead.  

Best of Luck w/ your project there Don!  

It is my impression that the term "white metal" is not a definite alloy, but a generic term for several alloys, which have different melting points.  Some are even less than boiling water, up to around 400F.  Micro Mark sells some of these alloys and gives melting points in their flyers.

Bick

Don,

I have Doug Walsh's book on vacuum forming and these are the FORMING TEMPERATURES he gives for  various plastic materials.

1. ABS styrene  300-350 deg F
2. PVC  255-355 deg F
3. Polycarbonate 350-400 deg F
4. PET-G 260-300 deg F
5. CAB 265-320 deg F

Hope this helps.

Wow, yes!  Thanks.  And I am chagrined for not remembering that was in the book- which I have on my shelf :-(

I think 'white metal' is a zinc alloy similar to 'Babbit' and the melting temp is, IIRC, over 400 deg F. so vac forming over it should be OK.There are lots of alloys called 'white metal' so you might want to google what you have to be sure. A link:

wiki.answers.com/.../What_is_the_Melting_point_of_white_metal

That would mean mine probably gets around 325 Degrees. Its a professional one that's a bit old but I'd assume most machines would be around the same temp.  Now does anyone know if that's hot enough to melt white metal?

Don,

I have Doug Walsh's book on vacuum forming and these are the FORMING TEMPERATURES he gives for  various plastic materials.

1. ABS styrene  300-350 deg F
2. PVC  255-355 deg F
3. Polycarbonate 350-400 deg F
4. PET-G 260-300 deg F
5. CAB 265-320 deg F

Hope this helps.

Reason for the question originally is that I am planning on building a new machine, a bit larger than my Mattel.  I see good buys lately on those infrared optical temperature gauges, and thought maybe I could use one of those to measure the temperature as I heat the plastic.  I plan to heat it with a hair dryer or monocoat heat gun.  But I need to know the temperature I am looking for.

Not sure Don.  I have an old one that a Dentist office gave me when they bought a brand new one.  I know that when I used it, it got hot enough to just barley melt the edges of a plastic carb that I was trying to replicate.  So just out of curiosity do you think it would melt white metal?

Some machines have temp indicators and some have adjustable light indicators.It will take a while to find a machine like the ones I mention.Its also best to wait for the clear plastic to melt up because that is the true sight temp on when to pull for the forming process.My machine is an old Boch german made in the late 80's that I had converted to U.S. Specks while I was stationed in Germany flying F-4's.

Is it just an indicator like a light, or does it actually show temp in degrees?

Some vac u-form machines have a temp indicator built in.Those machines will cost a bunch.