Hello friends,

I intend to make a medium-sized piece (1.35mx 0.30m) with polyester resin, but I saw that it corrodes the potential risk of shrinkage during resin curing.

- The resin has the gel time of: 30 minutes and the manufacturing process would be by Hand Layup + vacuum bag or Resin nfusion.

The doubts are as follows:

"What do I have to do to stop this from slowing down?"
Because I can not have dimensional changes due to the product accessories.

Desmoulding after 4 hours of lamination cause me problems?

We have a small production line and we need to be quick in our process.

Thanks,
Dezer

Yeh you're going to struggle. The only way to really minimise it is to slow the process down, so only do a couple of layers at a time, drop the catalyst level a bit (depending on temperature), leave it in the mould for as long as possible, etc. You can also use additives like ATH, aluminium powder, calc carb, etc. But these will obviously effect other properties of the resin too.

A 4 hour demould time is just crying out for loads of warping with polyester resin.