Using Sheet Aluminum As Form For Vacuum Bagging

The vacuum bag material provides a tough layer between the repair and the atmosphere.

Using sheet aluminum as form for vacuum bagging. Although the pressure could be achieved using a press the more typical method is vacuum bagging. So when you pull the air out of a vacuum bag the atmosphere outside presses down on the outside of the bag with its full weight which is approximately 14 7 lbs per square inch. Either type of mold can be used for vacuum bagging but female molds are usually easier to seal while achieving good surface characteristics. Experimenting is essential to.

In either case after the bag is sealed and before vacuum is applied pressure on the inside of the bag is the same as the outside and is equal to atmospheric pressure which is approximately. 1 4 using vacuum bagging technology this manual is designed to give you the basics of vacuum bagging. 401c twist lock aluminum vacuum cup assembly is an economical cast aluminum 2 piece vacuum fitting providing a connection between the vacuum bag and the vacuum source. We can measure the amount of air removed from a vacuum bag relative to the air outside atmospheric pressure with a relative vacuum gauge.

Not sure what you are doing but my company used to buy the honeycomb and aluminum separately form one piece of aluminum over a mandrel apply glue and honeycomb then vacuum bag. If more than 5 10 parts which need a smooth finish are being produced female molds are worth the extra effort. After the part is laid up it must be vacuum bagged with all of the usual elements a bag to hold the vacuum peel ply so the bag does not stick to the part and bleeder breather cloth to absorb the excess resin. Vacuum packaging vapor barrier waterproof packing vacuum packaging and barrier bag packaging.

Most vacuum bag materials are one time use but material made from flexible silicon rubber is reusable. Compression molds are sometimes made by using both a male and a female form. This simple valve has 2 silicone rubber gaskets to help make the vacuum seal. The vacuum bag material is available in different temperature ratings so make sure that the material used for the repair can handle the cure temperature.

The bag may consist of a plastic sheet that covers the layers fig. 4 or it may utilize top and bottom sheets that enclose the laminate and the mold. Use with the af 2 quick disconnect and af 3 vacuum hose.