content_image/585410.jpg
<img src='content_image/585410.jpg'>

7. Pour the resin onto the fabric. The resin should be a continuous pool in the center area of the fabric. 

8. Put vacuum probes on the edge breather. 

9. Place a second piece of solid parting film over the fabric. This film should be the same size or larger than the first piece. 

10. Place and seal the vacuum bag, and apply vacuum to the bag. 

11. Allow 2 minutes for the air to be removed from the fabric. 

12. Sweep the resin into the fabric with a squeegee. Slowly sweep the resin from the center to the edge of the fabric. The resin should be uniformly distributed over all of the fabric. 

13. Remove the fabric and cut the repair plies. 

## Vacuum Bagging Techniques 

Vacuum bag molding is a process in which the layup is cured under pressure generated by drawing a vacuum in the space 

between the layup and a flexible sheet placed over it and sealed at the edges. In the vacuum bag molding process, the plies are generally placed in the mold by hand layup using prepreg or wet layup. High-flow resins are preferred for vacuum bag molding. 

## Single Side Vacuum Bagging 

This is the preferred method if the repair part is large enough for a vacuum bag on one side of the repair. The vacuum bag is taped in place with tacky tape and a vacuum port is placed through the bag to create the vacuum. 

## Envelope Bagging 

Envelope bagging is a process in which the part to be repaired is completely enclosed in a vacuum bag or the bag is wrapped around the end of the component to obtain an adequate seal. It is frequently used for removable aircraft parts, such as flight controls, access panels, etc., and when a part’s geometry and/or the repair location makes it very difficult to properly vacuum bag and seal the area in a vacuum. In some cases, a part may be too small to allow installation of a single-side 

