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Author Topic: Granite look DIY cast urethane plastic 60% case  (Read 5889 times)

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Offline Yoe

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Granite look DIY cast urethane plastic 60% case
« on: Wed, 16 September 2015, 09:20:10 »
Finally I got my mould made so I could try casting that case I've been talking about for a couple of months now.

The mould was made using this method i found on YouTube, but I added a plastic clad balsa plug for a precision made "hole" for the keyboard. I cast the keyboard upside down to get the ugly part at the bottom. :)
https://youtu.be/pP-7FQNArco

I prepped the mould with release agent and poured in the mix of Quarry Tone Granite FX Filler and Smooth-Cast 325.
http://www.smooth-on.com/Urethane-Plastic-a/c5_1120_1206/index.html
http://www.smooth-on.com/Urethane-Plastic-a/c5_1119_1389/index.html

Thirty minutes later I dismantled the mould and removed the cast. There were some imperfections, probably because I had mixed too little of the stuff, and had to make more real quick..

111144-0

But anyway.. after some shaving of edges, some leveling by sanding the bottom, and then dremeling a hole for the USB it was all done! So… this is what it looks like now. The keyboard is an Apple M0118 based custom with tactile Brown Alps.



111238-2 111240-3

Ta-da! :D
« Last Edit: Thu, 17 September 2015, 09:29:19 by Yoe »
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Offline sth

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #1 on: Wed, 16 September 2015, 09:21:23 »
ha! ridiculous. fantastic.
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Offline azhdar

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #2 on: Wed, 16 September 2015, 09:27:18 »
You'll never stop to impress me Yoe, how much does the case alone weight?.

Edit: Inanis post made me re-read and realise it's not actually stone haha.
« Last Edit: Wed, 16 September 2015, 09:35:09 by azhdar »
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Offline inanis

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #3 on: Wed, 16 September 2015, 09:33:15 »
I love it! It is pretty impressive how much it looks like stone.
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Offline Invaderevan

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #4 on: Wed, 16 September 2015, 09:34:19 »
That looks fantastic, well done!
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Offline CPTBadAss

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #5 on: Wed, 16 September 2015, 09:43:51 »
I love you
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Offline jbondeson

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #6 on: Wed, 16 September 2015, 10:00:26 »
IRC has voted and we think you need to put SGI Granite keycaps in this case!  :p
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Offline Yoe

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #7 on: Wed, 16 September 2015, 11:13:01 »
Quote from: inanis on Wed, 16 September 2015, 09:33:15
I love it! It is pretty impressive how much it looks like stone.

I know! I was impressed myself! Even the imperfections look realistic, like unpolished.

Quote from: CPTBadAss on Wed, 16 September 2015, 09:43:51
I love you

I know. :)

Quote from: jbondeson on Wed, 16 September 2015, 10:00:26
IRC has voted and we think you need to put SGI Granite keycaps in this case!  :p

I would agree, but I'm afraid they wouldn't fit. This keyboard is a bit narrower than standard ISO/ANSI 60%. I'd have to make a wider case… but.. well… that's not impossible :)

Quote from: azhdar on Wed, 16 September 2015, 09:27:18
You'll never stop to impress me Yoe, how much does the case alone weight?.

Edit: Inanis post made me re-read and realise it's not actually stone haha.

Haha, gotcha! :D Well, it's kinda heavy anyway.. like 910 grammes with keyboard installed.
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Offline jbondeson

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #8 on: Wed, 16 September 2015, 11:21:54 »
Quote from: Yoe on Wed, 16 September 2015, 11:13:01
I would agree, but I'm afraid they wouldn't fit. This keyboard is a bit narrower than standard ISO/ANSI 60%. I'd have to make a wider case… but.. well… that's not impossible :)

 :'(

Now we need to start a collection for you to raise the funds for the Granite Granite board! Lord knows that resin isn't cheap.
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Offline KHAANNN

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #9 on: Wed, 16 September 2015, 21:26:33 »
how does it smell?
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Offline njbair

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #10 on: Wed, 16 September 2015, 21:28:27 »
This guy always makes the coolest stuff.
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Offline CPTBadAss

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #11 on: Wed, 16 September 2015, 22:33:07 »
Quote from: njbair on Wed, 16 September 2015, 21:28:27
This guy always makes the coolest stuff.

His instagram page is so ****ing good I can't even. So glad he posts here too <3

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Offline Yoe

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #12 on: Thu, 17 September 2015, 01:16:43 »
Quote from: KHAANNN on Wed, 16 September 2015, 21:26:33
how does it smell?

It's completely odorless as far as I can tell.
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Offline Yoe

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #13 on: Thu, 17 September 2015, 09:29:49 »
Updated OP with some more pics.
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Offline Dernubenfrieken

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Re: Granite look DIY cast urethane plastic 60% case
« Reply #14 on: Thu, 17 September 2015, 13:27:41 »
How much of the mix did you end up using?
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Offline Yoe

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Granite look DIY cast urethane plastic 60% case
« Reply #15 on: Thu, 17 September 2015, 14:40:01 »
Quote from: Dernubenfrieken on Thu, 17 September 2015, 13:27:41
How much of the mix did you end up using?

About half of it I think. The plan is to make another cast this weekend if I get time for it.

Edit: By volume I used about 1.5 dl of each component, plus 3 dl of the filler.
« Last Edit: Thu, 17 September 2015, 23:49:40 by Yoe »
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