Wow, quite a lot of responses on this subject! Well, I think it's a big NO for the pressurised water then, I was aware of the dangers of it but never thought it would be this hard to implement a system like this.
About the salts Andy mentioned, it's a good way to heat the molds, but as he told the problem would be when the salts solidify. Also my idea is to use the same conducts in the mold for heating and cooling, so that's why I would like to use the same fluid for both processes. Wich is going to be impossible with the salts. The main goal here is to raise the mold temperature near the melting point of the PVC (around 150°C) so the idea is to raise the temperature of the fluid a lot more than that to rapidly heat the mold. Another method could be induction heating but even though the temperature to reach is not that high, the mass of the mold is so much that I can't think of an easy way of doing it. So I guess the most suitable solution would be the DOW oils. The problem with the different molds can be solved with a vacuum pump to extract all the fluid from the circuit and send it to the container, is that a possible solution? I still need to contact a DOW representation here in Argentina to find out how complicated this could be given the regulations and cautions to take into account. 2017-02-09 13:28 GMT-03:00 Todd Zuercher <[email protected]>: > I just love vacuum pump oil, we buy it by the 55gal drum a couple of times > a year. > What we get isn't quite that expensive though. > (I have to maintain a lot of vacuum pumps, about 3k ACFM worth of various > pumps @20iHg) > > > ----- Original Message ----- > From: "andy pugh" <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Sent: Thursday, February 9, 2017 10:46:01 AM > Subject: Re: [Emc-users] OT: Need some guidance on high temp/pressure > water circuit > > On 9 February 2017 at 15:22, dave <[email protected]> wrote: > > A service of 10 yrs at 400 C is not to be sniffed at. Probably priced > > like gold tho. > > Perhaps not as bad as I would have guessed. I found this from 2009 > "Dow announced that it is increasing the North American bulk price of > Dowtherm MX heat transfer fluid to $2755/tonne plus shipping 13 > September." > > I was expecting something in the region of vacuum pump oil (£3000 per > litre / $1750 per pint: > http://webshop.demaco.nl/santovac-oil-for-diffusion-pumps-100-cc.html > ) > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1916 > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
