Making moulds

[sfurini]

Hi
There's a current thread about resin supplies and a question has come about where to buy moulds. I make them (much cheaper - though not as neat as resin saver moulds I've seen on the web).

Make a positive first - wood, covered in vaseline/petroleum jelly to stop silicone sticking to it. Also, it's screwed together so it can be taken apart to get the silicone mould out once set.



I use ordinary bathroom silicone. You don't get the same neat finish as you can get with the pourable rtv silicone. I empty a tube or two into a bowl of warm water with washing up liquid in and I wear gloves! Mould the silicone into a lump under the water and then force into the mould. Once in the mould I used a piece of mdf to force it down as much as possible. This piece of mdf forms a base to the finished mould.



The finished and used moulds...



I know they look a little messy but when turned the blanks look ok...

 

[Treeesa]

Thanks Stewart -more than one way to skin a cat, I'd be happy with that result

 

[bassethound]

Nice easy way to do it....

 

[scouseroy]

how long did it take to set?

 

[Vic Perrin]

Like it

 

[Jim]

Thanks for adding Stewart .. If it works then it's a good un ..

 

[Penpal]

Worth making one every day for a result like that great to experience this in pics.

Peter.

 

[chas_41_uk]

Another useful way of making a mould

 

[sfurini]

I left to dry for a day - in the workshop as the vinegar smell might offend some nostrils!

 

[Penpal]

That smell caused me temporary blindness one time I was heavily into fish keeping 26 aquariums and I had a breeding tank with a metal base leaned over it to coat with silicone it felt next day like a welding flash all gravelly. There are so many slicones these days this one you used sets well.

Peter.

 

[silver]

Yep, it it works why change it.

Thanks for sharing..

 

[AllenN]

Great idea. I had never thought of using that sort of domestic silicone for mould making.

 

[Dalboy]

Like you Stewart I made mine from silicon and found it works a treat instead of lining the mould with vasoline I used cling film and made the square block to form the recess seperate and held it in place with double sided tape so once it was removed the box is used as a support because I only made mine 1/2" thick all round saves on silicon. At the moment I use a clamp to hold the loose side. The reason I left one loose side was for easy removable during the making as well as being able to lift it out when the resin has set.

 

[sfurini]

Nice one. I've got a block like that from when I was using PR. The alumilite is more pricey and so I've restricted myself to just single pen blanks for now. I'm tempted by the polyurethane resins from the supplier you use but I'm not sure they will do for pen blanks. Have you ever used it?

cheers

Stewart

 

[Dalboy]

Nice one. I've got a block like that from when I was using PR. The alumilite is more pricey and so I've restricted myself to just single pen blanks for now. I'm tempted by the polyurethane resins from the supplier you use but I'm not sure they will do for pen blanks. Have you ever used it?

cheers

Stewart

I am using PR at the moment but am tempted with PU as well which many say is very similar to Alumilite

 

[sfurini]

Am just casting now with my last alumilite. Will give PU a go when I generate some funds. ....

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[sfurini]

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[bassethound]

Looking good Stewart...

 

[Penpal]

Rewarding efforts having a go is high on my priorities showing is too well done.

Peter.

 

[wm460]

I have made molds like this but the price of slastic here, it was a little dear to buy ready made mould from US.