| I have just got a new large vacuum veneering bag. I am using an old | frig compressor as a pump . this compressor will pull 25" of vacuum | easily . | | the problem is sealing the bag . I have tried the two boards with | sealing tape , the pvc pipe method a la taunton veering book and | the two boards with a 1/2"dowel glued insert .....all top no avail | .the pump will not pull any vacuum at all because I cammot get a | decent seal .
Mike...
I've worked with vacuum clamping and not with veneer pressing; but would like to suggest laying out a strip of _closed_-cell weatherstripping (1" wide, any thickness) and folding it lengthwise over the end of the bag you want to seal (no wrinkles allowed!). Leave a quarter-inch or so between the end of the bag and the fold and trim the foam so it protrudess about a half-inch beyond the already sealed sides of the bag.
Then clamp a pair of 1" small boards over the entire length of the foam to maintain the closure.
The weatherstripping should seal well to the plastic, and _really_ well to itself. It's inexpensive and readily available. Make sure that what you use is closed-cell.
The weatherstripping should do the job. It's what I use to provide the seal on my vacuum pucks with good result. When you're done, remove the boards and the weatherstripping is easily removed.
HTH
-- Morris Dovey DeSoto Solar DeSoto, Iowa USA
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