View Full Version : What are the tanks for?

11-05-2008, 10:23 PM
I see vacuum forming machines and they have air tanks attatched to the vacuum pump. Why are they used? what do they do?

11-05-2008, 10:28 PM
When you apply the vacuum to the mold you want things to suck down real fast before the plastic has time to cool. To do this you use a small or medium size vacuum pump to pull a bunch of tanks down to a good vacuum and then use the tanks to pull a vacuum on the mold very quickly.

01-19-2009, 12:55 PM
To elaborate on what Geof said, vacuum pumps don't pump fast enough, so a vacuum is pulled on the tank instead of just letting the pump pull it on the part.