Mold Material

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PTownSubbie

PTownSubbie

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I have been experimenting with casting over the last month. I have some molds made from silicone caulk but want to make some better molds to fit my needs/desires.

What material does everyone use to make their molds? Links to products would be very helpful!

Thanks!!
 
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Plastic cutting boards.

I can't remeber where the tutorial for making these are at. I thought I saw in in the Library somewhere, but I couldn't find it-maybe someone can link it.

I have never tried it, but did see it somewhere.
 
I read the tutorial but I am looking for a pourable mold material that will fill holes to make a mold to hold a brass tube.

If I was going to just make a rectangle, I would stay with the silicone. It is the easiest way to go but I want a little more.
 
If you want a simple silicone mold, you can use OOMOO 25/30. They are measured 1A:1B by volume mix ratio. OOMOO is a very flexible silicone mold material. It is pourable, it picks up fine details (you can read LEGO in the little round casts on my molds), the 25 is ready to cast out of in 2hrs, the 30 is ready to cast out of in under 7 hrs. OOMOO is a very simple and forgiving 1st time mold making material.

The molds that can be seen in my photos, are made with OOMOO 25, and still in use today although they are about halfway through their usable life. My new silicone ones are made from a different silicone.

http://www.reynoldsam.com/index.php?cPath=2_1113_1136
 
Most excellent. OOMOO was the material I had seen before but couldn't find in the forums again.

I have a local distributor for Smooth-On products also!! I think that is the one to go with.

Thanks for the assist everyone.
 
Glass Scratcher said:
If you want a simple silicone mold, you can use OOMOO 25/30. They are measured 1A:1B by volume mix ratio. OOMOO is a very flexible silicone mold material. It is pourable, it picks up fine details (you can read LEGO in the little round casts on my molds), the 25 is ready to cast out of in 2hrs, the 30 is ready to cast out of in under 7 hrs. OOMOO is a very simple and forgiving 1st time mold making material.

The molds that can be seen in my photos, are made with OOMOO 25, and still in use today although they are about halfway through their usable life. My new silicone ones are made from a different silicone.

http://www.reynoldsam.com/index.php?cPath=2_1113_1136
Click to expand...

Ok, so for people like me that are totally inept at figuring out this type of project, how exactly did you make the 2 blank mold? I watched the video attached to the website and old Martha and cute Kelly making candle molds which seemed easy enough, but I'm confused on what you used to make those nifty molds in your picture section
 
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mtgrizzly52 said:
Ok, so for people like me that are totally inept at figuring out this type of project, how exactly did you make the 2 blank mold? I watched the video attached to the website and old Martha and cute Kelly making candle molds which seemed easy enough, but I'm confused on what you used to make those nifty molds in your picture section
Click to expand...

They are legos homie! Did you have a deprived childhood?
 
Glass Scratcher said:
If you want a simple silicone mold, you can use OOMOO 25/30. They are measured 1A:1B by volume mix ratio. OOMOO is a very flexible silicone mold material. It is pourable, it picks up fine details (you can read LEGO in the little round casts on my molds), the 25 is ready to cast out of in 2hrs, the 30 is ready to cast out of in under 7 hrs. OOMOO is a very simple and forgiving 1st time mold making material.

The molds that can be seen in my photos, are made with OOMOO 25, and still in use today although they are about halfway through their usable life. My new silicone ones are made from a different silicone.

http://www.reynoldsam.com/index.php?cPath=2_1113_1136
Click to expand...

Ok, so for people like me that are totally inept at figuring out this type of project, how exactly did you make the 2 blank mold? I watched the video attached to the website and old Martha and cute Kelly making candle molds which seemed easy enough, but I'm confused on what you used to make those nifty molds in your picture section

Thanks for the information!

Rick (mtgrizzly52)
 
Whoa!

jleiwig said:
They are legos homie! Did you have a deprived childhood?
Click to expand...

WHOA BABY!!!!

First of all, I apologize for multiple exact posts. Got distracted and hit the wrong button.

As far as the disrespectful answer to my question, I'm not your homie, I'm here to learn. I did not have a deprived childhood, probably based on your response, you may have some issues in that area. As far as legos are concerned, I've never seen legos that large, but what a great idea.

One last comment: I belong to a lot of really good forums on woodturning, building fishing rods, etc, and in the several years I've been member of these forums, I have never had anyone take a bite at me for any query I've had. This forum has a good reputation, or so I've heard, plus, in the time I've been a member I have learned a lot of new tricks and got lots of great ideas, these molds being one of those great things I've learned. If a member of this forum is going to get bit because they aren't quite as smart as some of the "experts" here, then I may start to question whether it's worth being a member of the IAP.

Lighten up Dude!

For the rest of those that either have posted here, or read this response I apologize for losing my temper in this response.

mtgrizzly52
 
mtgrizzly52 said:
Ok, so for people like me that are totally inept at figuring out this type of project, how exactly did you make the 2 blank mold? I watched the video attached to the website and old Martha and cute Kelly making candle molds which seemed easy enough, but I'm confused on what you used to make those nifty molds in your picture section
Click to expand...

A 3/4" square dowel, cut into 5-1/2" segments, glassed for a little bit of extra thickness and length.

1 Legos panel, and a bunch of Legos I "borrowed" from the kids. I used the 2's, 4's, 6's, 8's, and cap blocks. I laid a layer of caps 4 across and about 6" long, used double sided tape to adhere the dowels to the cap blocks, evenly spaced creating a 1/2" space between the dowels. Used Kleen Klay (it may go by other spellings) to close the gaps around the caps and the Lego panel, and the joint from the dowels to the caps. Build a Lego wall 3 blocks high with a cap block layer all the way around the dowel assembly but 1 Lego space off of the cap block platform that the dowels are on. If there are any major gaps in the Lego wall/box then fill with some Kleen Klay.

Mix your Silicone, and pour in a low spot to fill the Lego mold box to the top. You should have about 1/2" of silicone on all the sides and from the top of the dowels to the top edge of your mold box. Let it sit and cure for the appropriate amount of time per the instructions. Pull you Lego box apart and pull off your finished mold, and turn it face up.

Fill your mold with resin, allow for cure, decant and refill as necessary.
 
Glass Scratcher said:
Silicone mold material doesn't stick to Legos. Silicone mold materials should only bond to itself and it will adhere to glass. But if in doubt use a mold release spray or a barrier coat of talc or wax.
Click to expand...

Thank you very much for the how-to on making the molds. I can do anything if I can either see it done once or have it explained as you have with your post. I'm just not very original in coming up with ideas. You have set me on the path of casting my own blanks in the near future. I have the pressure pot, and need to get it modified. In the mean time, I'll get the molding material ordered and be ready to go when it gets here....oh yes, I need to buy some legos as well. My grandson will love me even more for buying "him" those bumpy toys! *LOL*

mtgrizzly52
 
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