Question on vacuum forming

thrasher4556 · Post by **thrasher4556** » Sun Jul 10, 2005 11:13 pm

I have a plaster mold for a case I want to form. Do I have to coat the plaster in anything to make the plastic so it will not stick to the plaster after forming, or will it just slide right off with nothing on it? (I'm using polystyrene and possibly ABS).

gamer2 · Post by **gamer2** » Sun Jul 10, 2005 11:18 pm

i hear giving the negetive a good 2 coats of Crisco or PAM should do it fine

jaytee · Post by **jaytee** » Sun Jul 10, 2005 11:52 pm

gamer2 wrote:i hear giving the negetive a good 2 coats of Crisco or PAM should do it fine

it's technically a positive.

Post by **Triton** » Mon Jul 11, 2005 12:26 am

yep, i used crisco

cennar · Post by **cennar** » Mon Jul 11, 2005 2:17 am

i used... fraken case!!!

*o* · Post by ***o*** » Mon Jul 11, 2005 5:00 am

WWWOOOOHHHHOOO FRANKEN CASE ROCKS!!!!!!!11!!!!!!!!!!!!!!!!!11!!!1!!

Lucretius · Post by **Lucretius** » Mon Jul 11, 2005 10:51 am

I'd use and old shoe, but that's just me...

thrasher4556 · Post by **thrasher4556** » Mon Jul 11, 2005 7:31 pm

How many horsepower shop vac do you need to vacuum form something? I've got a 2hp and it isn't working too well. The mold for the case is 1.5 in in height.

XBOXPortable · Post by **XBOXPortable** » Mon Jul 11, 2005 8:28 pm

I think you need more like 6 hp.

daguuy · Post by **daguuy** » Mon Jul 11, 2005 9:42 pm

POD says 4 hp

gamer2 · Post by **gamer2** » Mon Jul 11, 2005 9:50 pm

Does a kirby Vacuum cleaner work?

Post by **Triton** » Tue Jul 12, 2005 5:33 pm

my shop vac is 2.75hp and seems to work ok