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Old 03-05-2009, 10:49 AM   #46
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

i'm buying a pack of 24 sticks of oyumaru in ebay right now, for GBP9.99.
yes, each stick is even smaller than a packet of 5-piece chewing gum...size for size.

it depends on just how much we can study / learn on this tiny little wonder, then we could safely say it CAN / CANNOT do a full car body.
of course, if we were to use a big amount of it to cast, we have to use the 'lego' method. like i've said, we need to experiment with it first...

i can see there are still many unknowns pertaining to the usage & ability of this oyumaru...could someone who know alittle more than me...please stand up!?!?

any japanese translater!?!?
marc
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Old 03-05-2009, 10:59 AM   #47
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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What ?? 10 euros ?? are you kidding ??
and where do you take these 10 euros from ??
that's only a few more than the price of one pack...
Do you really think you will have enough with one or two pack to cast a 1/24 body ??!!
Here, I ordered one of these this past week end, and I think it will be more than enough to fill the interior of a 1/24 car body shell.

http://cgi.ebay.at/Oyumaru-Moulding-...3286.m63.l1177

Also I only mentioned using Oyumaru for the interior part of the mould not for the whole mould.
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Old 03-05-2009, 11:17 AM   #48
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

ah yes jano11, this is the same set i'm gonna buy later.

plus the other 6 sticks in hand, let's see what i can do with it.
but i need to fnd some really liquid putty fill to get a good cast result(no air bubbles)...

THAT WHY I NEED I JAPANESE MODELOR TO GO & FIND OUT WHAT ARE THE COMPATIBLE MATERIALS OUT THERE!!!

nippon san, where are you!
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Old 03-05-2009, 11:19 AM   #49
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by jano11 View Post
Here, I ordered one of these this past week end, and I think it will be more than enough to fill the interior of a 1/24 car body shell.

http://cgi.ebay.at/Oyumaru-Moulding-...3286.m63.l1177

Also I only mentioned using Oyumaru for the interior part of the mould not for the whole mould.
Ok that's why I changed my post... I didn't see there was a new package with so many sticks...
mines only contains 7 small sticks.


Quote:
Originally Posted by rockinanko
it depends on just how much we can study / learn on this tiny little wonder, then we could safely say it CAN / CANNOT do a full car body.
Marc, I already used oyumaru, that's why I think I CAN talk about my experience and CAN say it will be almost impossible to use oyumaru even only on the inside of a 1/24 body to cast it.

it hardens too fast to let you enough time to apply it in each corners and over each details of a body (spoiler, air intake etc) and get a perfectly tight mold.
don't forget it's not liquid resin-like, it's paste-like, it takes forms by your fingers action and hardens in only a minute or so...!

I tried with a 1/43 scale body; it's already hard at this scale top get something convincing...


But if you can do it I'll be pleased to watch it ! And learn about it...
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Old 03-05-2009, 11:27 AM   #50
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

well rallymaster,

now that you know both jano11 & i are armed with 24 & 30 sticks respectively, do rest assure we all will make something out of this together & share the info right here in this thread.

cheers!
marc
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Old 03-05-2009, 11:27 AM   #51
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

incidentally, if you want to use less silicone and not keen on working with something so uncontrollable fluid, you can get thickening agents to add to your silicone mix that can if you add enough, turn it into a soft mass that you can squish around like plastercine.

negates the need to over use silicone when making molds.
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Old 03-05-2009, 11:35 AM   #52
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Permit me to be very sceptical about the feasibility, practicality and economy of trying to mold a car body in 1/24 using this stuff (Yes, I do have some in my workshop).

Firstly, based on my limited experience in resin casting, you need a lot more than just a thin skin of mold (even for the inside of a car body) and then it will be VERY expensive.

Secondly, you will need to make the mold each time you cast a new body (probably)

Thirdly, what is a body without the floor plan, interior, suspension..........etc etc. so you will need a loooooooooooooot of Oyumaru-san

Fourthly, Silicone is not all that expensive if you look around. I buy 1kg of silicone rubber for approx 20GBP

Fifthly, before you start trying to cast 1/24 car bodies, you'd better start off seeing of you can cast simpler parts successfully otherwise what you "save" on silicone rubber you'll be spending on wasted resin

Sixthly, I don't mean to sound either negative or critical - just sharing my thoughts and perpsective
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Old 03-05-2009, 11:41 AM   #53
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by rockinanko View Post
ah yes jano11, this is the same set i'm gonna buy later.

plus the other 6 sticks in hand, let's see what i can do with it.
but i need to fnd some really liquid putty fill to get a good cast result(no air bubbles)...

THAT WHY I NEED I JAPANESE MODELOR TO GO & FIND OUT WHAT ARE THE COMPATIBLE MATERIALS OUT THERE!!!

nippon san, where are you!
I can read Japanese, but I've never read its instruction or any suggestions online.

To save money, you can reuse silicone rubber. You just have to cut a hardened mold into pieces, and use them as a filler for the next mold. That way, you only need just enough fresh silicone to cover the new master, and the rest can be filled with chopped-up old silicone.
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Old 03-05-2009, 11:47 AM   #54
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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Fourthly, Silicone is not all that expensive if you look around. I buy 1kg of silicone rubber for approx 20GBP
The price of the silicone rubber would be OK if the shipping wouldn't be so damn expensive. Last time I asked in UK I almost fall off the chair when they told me that being classed as hazardous the shipping price is more than if I take the plane and pick it up myself!
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Old 03-05-2009, 11:49 AM   #55
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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To save money, you can reuse silicone rubber. You just have to cut a hardened mold into pieces, and use them as a filler for the next mold. That way, you only need just enough fresh silicone to cover the new master, and the rest can be filled with chopped-up old silicone.
That's something I never thought about.
Once a mold is deteriorating it has no other use than this!

Thanks for sharing this idea!
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Old 03-05-2009, 11:54 AM   #56
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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Originally Posted by jano11 View Post
The price of the silicone rubber would be OK if the shipping wouldn't be so damn expensive. Last time I asked in UK I almost fall off the chair when they told me that being classed as hazardous the shipping price is more than if I take the plane and pick it up myself!
Who said I buy it in the UK?!?!

Ioan, you always moan about how much something costs and then go and buy 6000 kits that you won't build
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Old 03-05-2009, 11:54 AM   #57
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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but i need to fnd some really liquid putty fill to get a good cast result(no air bubbles)...
Get some resin, it will be better quality, more resistant and cheaper.
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Old 03-05-2009, 12:00 PM   #58
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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Who said I buy it in the UK?!?!
Well you used GBP for currency.
Maybe you should have used Zloty!

Quote:
Originally Posted by klutz_100 View Post
Ioan, you always moan about how much something costs and then go and buy 6000 kits that you won't build
You're right about the kits (not 6000 though), but really the stuff was cheap however they told me the shipping from UK to Austria for 2 kg Silicone rubber and 2 kg resin would have been some 200€!

Anyway, I've got little time this year, for such experiments and before starting to cast something I'll need to produce the prototype working during the late night hours.
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