I manufactured my molds sets utilizing Resin Services HTR 250 epoxy tooling system and their HTR 302 X face coat along with 14 plies of style 7500 tooling cloth. I have also manufactured them from 6061-T6 aluminum machined on a lathe, Note: If you are making epoxy tooling for use in an autoclave then you must also make your tooling in the autoclave. What I mean is this, the face coat and first 4 plies need to be vacuum bagged and placed in the autoclave under pressure allowing to full cure, prior to abrading and placing the remaining plies on the mold, failure to perform this small detail will result in ruined tooling first time it is used under pressure, voids and inclusions that would never be an issue under the face coat will become major issues once your part and tool are under pressure especially if you use any type heat to accelerate your cure. Remember, you are now processing @ 60 PSI not 28-29 hg. equaling roughly only 14 PSI.
The spinner's and back plates are hand laid up on the male side of the two piece compression tooling set in one piece layers with no cuts. 2 plies on the spinner's, 4 plies on the back plates and epoxy resin as the matrix, The 2X2 twill goes down nicely creating what appears to be 4 uniform quadrants as the weave gathers at each quadrant, I then place the female side of the tool set over the layup, slip everything inside a pre made vacuum bag envelope I make with bagging and bag tape, close and debulk with vacuum. I then place everything into the autoclave with vacuum connected, close the lid, and pressurize the vessel to 60 PSI. After 10 minutes I disconnect the vacuum source allowing the vacuum bag to vent to atmosphere throughout the cure cycle.
Last edited by sensei; 09-27-2013 at 03:59 AM.