Re: Fusible Core Castings

From: Vittorio Pedron (
Date: Thu Jun 25 1998 - 20:57:11 EEST

Chad Wedding wrote:

> Hello, my name is Chad Wedding and I work for R.J. Robinson at the
> University of Kentucky. I am working with low melt alloys from MCP to
> form the core inserts for RTV molding. The core mold is also RTV. The
> alloy is Tin-Bismuth and melts at 70 degrees C. The problem we are having
> is that we the parts have a very porous surface. If anyone has any
> experience with casting thes low melt alloys, I would appreciate any
> recommendations concerning temperature, rate of fill, etc.
> William Chad Wedding
> For more information about the rp-ml, see

  You can do that job by other alloys from MCP. I would suggest to use MCP 69
and / or MCP 96.
The first you can cast between 75C and 85C and the second around 105C -
Do not put the gate directly on the core but better on the bottom side.
Warm up the mould, at least 70C with the MCP 69 and 90C with MCP 96; be sure
there's no moisture in the mould.
If you need more info contact me.

Best regards.
Vittorio Pedron
MCP Italia S.r.l.

For more information about the rp-ml, see

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