Talk Composites - The Forum for Advanced Composites

Polyester moulds and epoxy

http://www.talkcomposites.com/Topic3619.aspx

By ajb100 - 11/30/2012 11:03:40 PM

Hi guys, I was wondering if someone could clear something up for me as I've read conflicting information and now  I have a project where I need to know

Basically, I've been asked to make a part from epoxy using a mould which is being supplied.

The downside is the mould is made using polyester resin and some people say that I 100% won't be able to remove the part when finished, some say I need to use their special technique and combination of release agents and some say it'll be fine. Don't know if it'll make much difference, but I plan on using gc50 so hoping this will act as a decent barrier between the mould and epoxy

Some solid advice would be great. I've only ever had to use easy lease and wax and never had a problem making polyester parts in an epoxy mould.

I don't want to have to make a polyester buck, seal and make an epoxy mould as that cost will scare them away

Thanks in advance
By ajb100 - 4/24/2013 7:19:11 PM

FLD (14/12/2012)
You will run into issues if you bake the mold though Sad




Bringing up an old thread, but on this topic, I now need to make a structural part and it will be out in the sun quite a bit (assuming this British "summer" happens) so I need to post cure them to stop them softening.

As long as the polyester mould has been post cured before use to remove all styrene, then will it be ok? Not too worried about mould stability as they will pretty much be single use