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Forums - News / General |
For General modelling or hobby-related topics that are not covered by any other specific forum. Please keep to topics concerning the hobby. |
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| Messages | 23120 |
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| Subject: | Re: Casting 1/35 Main gun ammo |  |
| Date: | Dec 11, 2002 |
| From: | Kurt Laughlin | |
"Mark Rethoret" wrote
> Maybe someone here can help me, I need to cast some 76mm rounds I've
turned for a T-34/76 project that I've been working on.
> I have experience with RTV and casting resins but I haven't been able to
come up with a satisfactory way of casting these tiny things while limiting
distortion (as would happen with a 'squash' type mold).
> Have any of you come up with a good "in home" method for this sort of
thing?
I use an industrial RTV from Silicones, Inc. and the 7-minute (long) cure
resin from Micro-Mark. I would attach the cartridge bases to a plastic
sheet with white glue. Build a tube or whatnot over this and make your
mold. When you are ready to cast, shake some talcum powder down into the
mold cavity and swish it around, then dump it out and tap/shake/blow any
loose stuff out of the cavity. After you've mixed the resin, use a
toothpick and drip a few small drops into the mold, wetting the sides as
much as possible. Turn the mold around and wet the whole cavity. Use a
flashlight and check that there are no bubbles at the tip - squeeze it or
whatever to pop them. When you are satisfied that it is nicely coated, you
can fill the mold.
When you pull the part, the plug will be at the shell base. You ought to be
able to trim it off square. If not, sand it level and use a disk from thin
plastic sheet to replace the case rim.
KL |
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 | Casting 1/35 Main gun ammo - Mark Rethoret - Dec 11, 2002 |
| . . . Re: Casting 1/35 Main gun ammo - Mike Canaday - Dec 11, 2002 |
| . . . Re: Casting 1/35 Main gun ammo - Rick Young & Carol MacLennan-Young - Dec 11, 2002 |
| . . . Re: Casting 1/35 Main gun ammo - Kurt Laughlin - Dec 11, 2002 |
| . . . . . . Re: Casting 1/35 Main gun ammo - Mark Rethoret - Dec 12, 2002 |
| . . . . . . . . . Re: Casting 1/35 Main gun ammo - Mike Canaday - Dec 12, 2002 |
| . . . . . . . . . Re: Casting 1/35 Main gun ammo - Kurt Laughlin - Dec 12, 2002 |
| . . . . . . . . . Re: Casting 1/35 Main gun ammo - Rick Young & Carol MacLennan-Young - Dec 13, 2002 |
| . . . . . . . . . . . . Re: Casting 1/35 Main gun ammo - Mark Rethoret - Dec 13, 2002 |
| . . . . . . . . . . . . . . . Re: Casting 1/35 Main gun ammo - Rick Young & Carol MacLennan-Young - Dec 14, 2002 |
| . . . . . . . . . . . . . . . . . . Re: Casting 1/35 Main gun ammo - Mark Rethoret - Dec 15, 2002 |
| . . . . . . . . . . . . . . . . . . . . . Re: Casting 1/35 Main gun ammo - Rick Young & Carol MacLennan-Young - Dec 14, 2002 |
| . . . Re: Casting 1/35 Main gun ammo - Gerald E. McCrary - Dec 13, 2002 |
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