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Old 10-19-2008, 03:44 AM   #1
leokc_ng
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Smile Casting your Parts in 30 Min (No silicon rubber required !!!)

Been in this forum for a while, and had seen quite a few members struggling from casting their model parts. The main concern of using silicon rubber and resin are
1 High initial cost
2. Limited lifespan of the resin
3. Most of the time you only need to cast a few object but you need to buy a huge quantity


So "Oyumaru" is what you need. Oyumaru is a Japanese Moulding material. Which is like silicon rubber when cool, it will soften to a form like chewing gum when you boil it in 80C Celsius water. The great thing about this product is it is completely reusable. All you need to do is to put it in the hot water again.

1. The 350z rear bumber and 6 pieces of Oyumaru


2. Dip the Oyumaru in hot water to softern it, will turn to transparant when it is ready for use


3. Dry them with a paper towel


4. Put it on the part you want to copy and work aroud to the sape you want
(Personally i prefer to fill up the inner part first)


5. Wait for it to cool down (Take around 5-10 min to cool down). Then make the other side of the mould


6. Separate the 2 mould when it cool down completely


7. Mix your 2 part putty


8. Fill up each side of the mode (fill up the edge first)


9. Put the mould back together and sqeeze out the extra putty


10. Separate the mould when the putty is around 90% hard, Clean up as much edge as you can with your modelling knife


11.Here's the finish product




P.S. Some member are conserned that the hot oyumaru might demage the plastic parts. From my experiance it is pretty safe. As plastic is a very poor conductor and Oyumaru cool down pretty quick

Happy Casting everyone
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Old 10-19-2008, 04:17 AM   #2
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Hi, i must say this is a very good & unique product!
but i have a few questions pertaining...

1) will the 2-part resin putty stick onto the item after casting?

2) where to buy the item?

3) are they expensive?

i'm in to scratchbuilding most of the time & this item will definitely speed up my building process. it will save me alot time to sitting down & scratching my head where to get X or Y parts for the build.

please help me in locating such items if you can...thankx!
cheers!
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Old 10-19-2008, 04:23 AM   #3
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Where u get that oyumaru, online?
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Old 10-19-2008, 04:29 AM   #4
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

1) will the 2-part resin putty stick onto the item after casting?
-> No won't stick, worse case give the mould a brush and wash in cold water. The resin putty will come off easily as Oyumaru is elastic.
2) where to buy the item?
-> Depends on where you are. you should be able to find it in a lots of online art and craft shop. Try google oyumaru
3) are they expensive?
-> Very Very cheap (Cost me around $6 AU a box, 7 pieces in each box)
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Old 10-19-2008, 05:26 AM   #5
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Thanks for this oyumaru tutorial!
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Old 10-19-2008, 05:43 AM   #6
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Nice

I need to get me some of that
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Old 10-19-2008, 09:27 AM   #7
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

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Old 10-19-2008, 07:06 PM   #8
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by leokc_ng
1) will the 2-part resin putty stick onto the item after casting?
-> No won't stick, worse case give the mould a brush and wash in cold water. The resin putty will come off easily as Oyumaru is elastic.
2) where to buy the item?
-> Depends on where you are. you should be able to find it in a lots of online art and craft shop. Try google oyumaru
3) are they expensive?
-> Very Very cheap (Cost me around $6 AU a box, 7 pieces in each box)
where you from?
australia?
if yes, where you get the Oyumaru?
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Old 10-19-2008, 07:12 PM   #9
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Perhaps I can use this to cast a couple of sets of BBS DTM wheels.
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Old 10-19-2008, 08:04 PM   #10
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Samuel_Takumi
-> Yes I am from Western Australia. And I got them from
http://www.benjaminscrafts.com.au/ I know that there are few supplier in the eastern state too. Just google Oyumaru


tonioseven
-> I though of casting my aftermarket rims too. But I guess the shape is bit too complicate for 2 parts putty. Might need to use resin instead
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Old 10-19-2008, 09:42 PM   #11
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by leokc_ng
Samuel_Takumi
-> Yes I am from Western Australia. And I got them from
http://www.benjaminscrafts.com.au/ I know that there are few supplier in the eastern state too. Just google Oyumaru
so mostly can get in the hobby shop in aus?
i ask my friend go to find it, he now study in nsw
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Old 10-19-2008, 10:22 PM   #12
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by Samuel_Takumi
so mostly can get in the hobby shop in aus?
i ask my friend go to find it, he now study in nsw
No you don't find them in hobby shop. Most of the time you get them from art and craft shop. Also depends on where you are at this moment. As what i said google it, you should find a supplier close to you.
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Old 10-19-2008, 11:52 PM   #13
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by leokc_ng
No you don't find them in hobby shop. Most of the time you get them from art and craft shop. Also depends on where you are at this moment. As what i said google it, you should find a supplier close to you.
ok, thank for the info
i have been google it already
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Old 10-20-2008, 12:13 AM   #14
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Quote:
Originally Posted by klutz_100
Nice

I need to get me some of that
Either do I !
excellent product !

ArtClayWorld doesn't shipp to Europe, anyone know another place where to get some from for a similar price ?
I found one in France but with euro value it is far more expensive than what I found elsewhere...
(if it's the only solution I'll do with it)
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Old 10-21-2008, 08:09 AM   #15
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Re: Casting your Parts in 30 Min (No silicon rubber required !!!)

Can you use resin on Oyumaru?
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