1. Insulation 2. Heat blanket 3. Caul plate 4. Nonporous film 5. Porous film 6. Patch laminate 7. Bagging materials 8. Bagging film V1: Inner vacuum V2: Outer vacuum Bottom plate 1 2 3 4 5 6 5 7 8 V2 V1 Vacuum port Rigid outer box Vacuum port 0 10 20 30 40 50 60 70 80 90 100 110 120 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Ramp rate 1 °F to 5 °F per minute Vent outer box after 60 minutes Ramp rate °F to 5 °F per minute Vent outer box after 60 minutes Inner bag Full vacuum Outer box No vacuum Inner bag Full vacuum Outer box Full vacuum Inner bag Full vacuum Outer box No vacuum Inner bag Full vacuum Outer box Full vacuum Hold at 125 °F for 90 minutes  ± 5 minutes Hold at 125 °F for 150 minutes  ± 5 minutes 140 120 100 80 60 40 20 140 120 100 80 60 40 20 SMP-0029M1-9 Double Vacuum Debulk Cycle—Laminate Thickness  < 16 plies SMP-0029M1-10 Double Vacuum Debulk Cycle—Laminate Thickness <16 plies Figure 7-72.  DVD cure cycle. Figure 7-73.  Precured patches. Figure 7-71.  Double vacuum debulk schematic. Step 3: A Precured Patch Consult the SRM for correct size, ply thickness, and  orientation. You can laminate and cure the precured patch in  the repair shop and secondary bond to the parent structure,  or obtain standard precured patches.  [Figure 7-73] 7-43