11-12-08 01:02 PM - Post#87319
In response to rotor-1
All the main parts (except for the main bodies) have been sprayed with high gloss and have been installed in the parting boards.
The parts are inserted exactly half way into the cut outs, clay is then pushed into the gap to prevent resin from dripping down the side. The excess clay is cleaned off resulting in a nice clean parting line.
The plugs are held in place with Popsicle sticks which have been hot glued to the sides from underneath giving support and preventing the plugs from moving around while waxing and during lay-up of the glass layers.
First wax then PVA is applied to prevent the next layers from sticking and ruining your day.
After the tooling gelcoat was applied, layers of veil where individually applied. Veil is used to prevent print thru of the cloth pattern to the gelcoat. It also makes for a nice first layer void of any air bubbles. When parts are pulled there's a good chance the gelcoat would break off at the air bubble locations....bad, bad, bad.
And after the resin was applied to each of the layers this is what you are left with,... air bubble free!
This is veil, it's very fine and sort of desolves in the resin, so you put it down and leave it. No chance to re-position it.
First layers have "kicked" so one layer of mat goes on. This process will slowly continue with an end result of 6 layers to create a strong mold.
Here the halves separated from the parting board. A simple clean up of the dried PVA and clay residue and then I the process starts all over again...wax, PVA, gelcoat, layers...fun...fun.
And this is the end result....a nice shiny mold!
The details reproduce nicely.
After fully curing the insides will get polished to a mirror like finish.
Until next time,