Quote:
Originally Posted by Blue_Heron
Your mold doesn't have any taper. You will have to destroy the mold to free it from your part. Male molds that are intended to be re-used always taper from the opening to the inside. In other words, the closed end is smaller than the open end so it will slide out easily once you break the bond with the new part. I'm not saying it won't work, just that you need to think about how you're going to get the mold out without damaging your part.
|
Listen to Dave on this one. I made the same mistake on my first big fiberglass project. In the end I spent 3 hours hammer & chiseling the part out of the mold, while destroying the mold in the process while being EXTRA careful to protect my part....Taper is a must! My final part worked out okay, but my mold was trashed. Getting that "plug" out was a total P.I.T.A.!! I would say a 1/2" taper on 6" would be the minimum I would use. Say about a 1" setback for every 12" of vertical wall. Dave "Blue Heron" has more experience on that and may weigh in with his thoughts on minimum taper.