Wednesday, December 15, 2010

Apply the vacuum bag

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Before the vacuum bag can be applied, there are a number of things that must be added to the assembly. One item we must make are the resin infusion lines that will allow the resin to spread out over the whole panel. These lines are made out of 1/2 inch ID black plastic water hose available at any hardware store. We drilled 1/8 inch holes right through the plastic hose every 6 inches. You will have to remove any bits of plastic that hang on to the hose after the holes are drilled as they might puncture the bag when the vacuum is applied. To help disperse the resin, the hose is then inserted into a shade cloth cover that runs the whole length of the hose. These covers were made up before hand. 




The line is covered with shade cloth. This cloth has very open pores that will allow the resin to flow with out restrictions. This material is sometimes called "bleeder cloth" because it allows the air inside the bag to move freely to the evacuation lines. 





Here is the first resin line being cut for length. You will also see a line on the outside of the panel, about 1 foot from the edge of the table. This is a length of double sided tape that runs completely around the panel. The bag will attach to this tape and there must be no leaks between joins in this tape. The top cover is still on the tape and will be removed only when it is time to place the bag on the panel.




Next we cover the panel with a layer of peel ply. This material is placed directly on top of the last layer of glass and before any resin lines or shade cloth. When the panel has been infused and cured, the peel ply will make it possible to remove the resin lines, bag, and shade cloth from the panel. Larisa is attaching some shade cloth to the deck edge radius former to ensure good resin penetration and coverage 




Now Steve is attaching the first resin line to the panel. 






Now we attach the second resin line.






And the third and final line goes on.





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