Thread: My new larger vacuum chamber

Neil,

Looks the goods Neil, now go get stabalising and let us see it in action and what it can do ;-)

Cheers
Tony.

Past the test, no problems with any leaks

Now to cast some more croc blanks to stabilise

Cool, so next time you come to Melb, you can drop the small one off for me

Very nice,looking forward seeing what comes out of it

Put it to the real test today, doing croc jaw blanks, 36 at a time (6 layers of 6 blanks) . Could have added a few more layers too

Very Noiceeeee !!! happy to purchase a few of those Croc blanks too Neil if they are for sale ???

Cheers
Tony.

Originally Posted by AuS MaDDoG

Very Noiceeeee !!! happy to purchase a few of those Croc blanks too Neil if they are for sale ???

Cheers
Tony.

Soon

Originally Posted by AuS MaDDoG

Very Noiceeeee !!! happy to purchase a few of those Croc blanks too Neil if they are for sale ???

Cheers
Tony.

Originally Posted by dai sensei

Soon

keep me in mind as well neil

@dai sensei,

Is there any particular reason to use a clear chamber except to watch for foam rising to the evacuation tube? I was wondering if an open container in a pressure pot plumbed for a vacuum would work? Am I going down a dead end?

I use the clear just so I can see the bubbles, and how high the foamy mix rises. At full vacuum initially the bubbly foam can rise 300mm , it is amazing how much air can come out of blanks, and you sometimes then have to back off the vacuum. I used to do vacuuming inside my pressure pot, inside another container, and wondered why it always had resin in the bottom of the pot and little left in the container.

Originally Posted by dai sensei

I use the clear just so I can see the bubbles, and how high the foamy mix rises. At full vacuum initially the bubbly foam can rise 300mm , it is amazing how much air can come out of blanks, and you sometimes then have to back off the vacuum. I used to do vacuuming inside my pressure pot, inside another container, and wondered why it always had resin in the bottom of the pot and little left in the container.

Perhaps a series of screens would keep the foam down by disrupting the surface tension of the bubbles. Take a peek at my post in this thread. I think I'll add a few layers of screen to the foam basin to see if that helps with the foam issue. It'll be a couple weeks before I can get it all put together.

Good luck with the foam catch. Windows would work, just need to ensure they do not compromise your pressure vessel. You need some sort of visibility otherwise you will not know when done, although you could just eave it there for a few hours to make sure, although it depends on your elevation and vacuum pump (ie what pull you can get).

Originally Posted by AuS MaDDoG

Very Noiceeeee !!! happy to purchase a few of those Croc blanks too Neil if they are for sale ???

Cheers
Tony.

what he says neil are you selling them before you leave on trip or after ? can you please PM me the cost of them and I may get you to bring some down when you come south ?

Cheers Ian

Ian ,I saw Neil today,and he has a bit on his plate to finish off for a Sunday start to his travels rest assured that he will be well loaded with choice castings and other stuff , early on he will have lots of goodies for sale hehe, I got a couple of his croc jaw casts for a customer , the main reason for not selling generally is he is still putting together a work in progress and how to do these blanks ,just ran out of time ,but it will happen
Cheers ~ John