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Resin Casting


88Porsche944
12-29-2015, 08:43 PM
I'm about to try and do some resin casting, what I'd like to cast is a 1/24 scale car dashboard.
What would be the best way to do this, one or two piece mold, any idea?

MPWR
12-29-2015, 09:23 PM
I would do a two part mold. A dash would be pretty challenging in a one part mold.

firun
12-30-2015, 05:57 AM
One part mold. I've been using two-parts for a couple of years, but came to conclusion that one part is better in casting resin, rubber and clear parts.

gionc
12-30-2015, 07:38 AM
Two part mold, ever.

But i do a sigle mold and after curing I cut in two (or 1+1/2....) this is the way used in the microfusion of jewellery casting, they uses vulcanized gum to d mold to cast the waxes for the die cast, I observe very well those guys jealous of their skills and thought that a sigle mold zig-zag cutted in twice is the best way. No clay no needs to clean the cast... ;)

cjsbosox
12-30-2015, 02:40 PM
Or mold it in silicone and cut it open once it has hardened. Then you'll have a 2 part mold :)

firun
12-30-2015, 03:22 PM
One correction about one part mold here what I mean:
https://img-fotki.yandex.ru/get/9515/1310603.69/0_c3126_52c7ad00_XL.jpg (https://fotki.yandex.ru/next/users/firun/album/71153/view/799014)
https://img-fotki.yandex.ru/get/3113/1310603.69/0_c311e_81d293b5_XL.jpg (https://fotki.yandex.ru/next/users/firun/album/71153/view/799006)

Brake disc shown here is a clone of Tamiya (call it piracy if you want in mafia state like Mother Russia we don't care about labels :smokin:). The disc is right from the mold (only the casting sprue is cut).
I use these molds for all kinds of castings engines, discs, figures, tires and all these stuff. I use two-part molds only for car bodies.

Oh, my bear 🐻 has finished mixing resin and I need to rush to cast pirate copies. And feed my bear :pimp:.

88Porsche944
12-30-2015, 03:33 PM
Thanks all.

hirofkd
12-30-2015, 07:05 PM
With the two-part mold method, to simply put, you copy one side, copy another side, then pour resin. The copy will be an exact replica of the master (except for minor shrinkage). Alternatively, you can submerge the master part in silicone in one go, and cut the mold in half. Sometimes it's difficult to predict where the air would be trapped during casting, and may need some trial and error.

With the one-part mold method, you copy the face sides, and leave the backside open. Resin sits at the bottom because of the gravity, so you have to keep moving the mold as the resin cures. Because of that, it's difficult to obtain uniform thickness, but requires less time and less silicone. You can also fill all the small details with resin first, before adding more to make the part sturdy (it's kind of like building strength layer by layer).

A dashboard can be copied in either method, and the last time, I used the one-part mold method.

Capri-Schorsch
12-31-2015, 04:58 AM
Just make a picture of the part you want to copy.
After that we can say what is better.
Its not better by saying make this or this.
We have to see the part and than we can say whats better.

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