Re: re vac forming

In a message dated 6/15/99 7:40:02 PM SA Eastern Standard Time,
footman@... writes:

<< if you are looking for a good vac source, go to a local dairy farmer (if
you have any around) - apparently the pumps they use for their milking
machines can be easily modified - also, how thick is the silicone membrane
you are using - obviously the thinner the material, the more intimate it will
be against the mold >>

Thanks Chris,

I am using a rubber strip around the perimeter top edge of the perforated
table. The rubber strip is the stuff you purchase here in Chicago for
weeather proofing doors. About 1/16" in thickness by 1/2 " wide, works fine
once you get the frame lined up with the table.

I have seen photos of vac forming machines with a hand pump mounted on the
vacuum box, similar to the ones used for inflating bicycle tires the type you
would stand on with your two feet, with a T handle. I'd like to know how
this is installed and how it operates, not sure how it all works with a shop
vac, does it draw more vacum after the shop vac is turned on?

More info on this set up would be greatly appreciated. Anyone?

Thanks,

Mario
http://members.aol.com/microchper/mia280.htm