Subject: Re: Casting into rubber/silicone molds?

From: [email-masked] (J. Kimberlin)
Date: 1 Nov 1995 16:39:51 -0800

In article <[email-masked]>,
Don Stauffer <[email-masked]> wrote:
>
>From: [email-masked] (Don Stauffer)
>Newsgroups: rec.crafts.metalworking
>Subject: Re: Casting into rubber/silicone molds ????
>References:  <[email-masked]> 
><[email-masked]>
>Organization: Honeywell Technology Center
>X-Newsreader: WinVN 0.91.4
>
>In article <[email-masked]>, Rose Magers 
><[email-masked]> says:
>>
>>[email-masked] (chris morley) wrote:
>>> 
>>> Hi...has anyone done casting into  rubber/silicone molds ? I need to 
>cast some
>>> models in pewter or zinc (pot metal ). Can you please discribe what I 
>have to
>>> do, how to do the mold etc. What is the highest temp I can cast ? The 
>largest
>>> piece you have cast.  One of the parts is 8-10 oz and originally was 
>in zinc.
>>> Any brand of  rubber/silicone  better ?   thanks for your help...CHRIS
>>
>>hi chris I was under the impression thatr the silica rubber molds are 
>>used to make wax copys that are then used in lost wax plaster molds for 
>on 
>>casting in metal
>
>I have cast low temperature (toy soldier) alloys into silicone molds with 
>no trouble.  In fact, one of the suppliers of toy soldier casting 
>supplies sells such molds.  I am not sure how long they last, but they 
>certainly do last for 4-6 shots.
>
>Don Stauffer in Minneapolis

There was a thread on this subject 6 months ago.  Apparantly you can go 
up near or slightly over 1000 degF using rubber molds.  Conquest 
Industries in Santa Fe Springs CA had a video tape and info packet 
available on the subject.  Phone: 310-906-1111.

Someone was about to try to cast small aluminum parts in rubber.  Pot 
metal, pewter, lead, tin, - no problem.

JerryK

---

From: Mike Rehmus <[email-masked]>
Date: 3 Nov 1995 02:42:13 GMT

We had a talk about this technique at West Valley Live Steam Club.

The club Chairman had cast about (I think) 1,000 belt buckles
using this technique.  The failure mechanism of the mold rubber
is that it finally cracks.

The Silicon Rubber pads are capable of handling almost 1,000 degree F
metal.

The video is great and the work people do with this tool is
shown in a fair amount of detail.

Too bad it cannot handle aluminum!!

Best regards,

Mike Rehmus