Anybody ever do any molding?

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ed
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Anybody ever do any molding?

Post by ed »

I made some silicone moulds once but I didn't do the molding with epoxy. Anybody here ever do that?

I'm trying to replace a broken piece on a gun.
Hotarubi
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Re: Anybody ever do any molding?

Post by Hotarubi »

I left some carrots at the back of the fridge that didn't turn out too well. If that's what you meant
ed
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Title: G_D

Re: Anybody ever do any molding?

Post by ed »

Is that humor. Or perhaps humeour?

This is serious shit here, major restoration. I would apprecite a serious demeanor if you please
Hotarubi
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Re: Anybody ever do any molding?

Post by Hotarubi »

ed wrote: Fri Oct 23, 2020 9:25 pm Is that humor. Or perhaps humeour?

This is serious shit here, major restoration. I would apprecite a serious demeanor if you please
Serios.

Thanks.
ceptimus
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Location: UK

Re: Anybody ever do any molding?

Post by ceptimus »

JB Weld is good stuff - epoxy loaded with metal particles. You can paste it on without trying to mold it with any accuracy, and then machine / grind it back to the finished shape after it's set hard. Use a Dremel or similar tool for the machining - best done outside, and wear a mask because of the dust.

If you've not done it before, and are trying to fix up a gun, then I recommend practicing on some scrap item first - any old tool, lump of metal, or even wood: paste on the JB Weld, give it plenty of time to set, and then get used to how it handles when you attack it with drills, saws, files, and grinding discs.

When you're ready to start on the gun, make sure it's really clean, degreased, and if necessary roughed up, in the area where the JB Weld has to stick.

If it's a whole new part you're making then 3D printing is a good way to make a mould. Print it in ABS, and you can disolve away the mould from the moulded item with acetone. You can also use a quick application of acetone (or acetone vapor) to smooth the surface of the mould before moulding.
ed
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Joined: Tue Jun 08, 2004 11:52 pm
Title: G_D

Re: Anybody ever do any molding?

Post by ed »

It is the piece on the end of the grip. I think it is horn and got bust at some point
pix709699875.jpg
Now ... I have a similar pistol with an intact piece. My thought was to make a silicone mould and then cast some sort of black epoxy.

Yes, I have a lot of time on my hands, why do you ask?
gnome
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Re: Anybody ever do any molding?

Post by gnome »

Who molds anymore when there's 3-D printing?
ed
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Re: Anybody ever do any molding?

Post by ed »

need a solid image for that
robinson
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Re: Anybody ever do any molding?

Post by robinson »

Use JB weld, it will be hard as steel
robinson
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Re: Anybody ever do any molding?

Post by robinson »

And it comes in black
Witness
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Re: Anybody ever do any molding?

Post by Witness »

So have you molted yet, ed? :P
ed
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Joined: Tue Jun 08, 2004 11:52 pm
Title: G_D

Re: Anybody ever do any molding?

Post by ed »

Not yet. Got the silicone and epoxy. Maybe ill do a treatment of it here.