When we first opened shop in '85 we cheated with a normal house oven and
aluminum "turkey trays" of resin. We got away with this when only running 2
machines, but even then only in dry weather, but definitely not now with 27+
machines going 24 hours/day. If it's a 100% humidity day even heating in an
oven can just make things worse. You have to pull the hot moist air out and
through dessicant in a recirculating manor to pull the moisture level down
and down. We have floor unit dryers and try to get material in them 3 to 4
hours prior to machine mould change or start up. Then we load the machine
hopper from the floor dryer with enough to get the first couple hours of
machine running time and the machine mounted dryer takes over from there to
stay with the process continuously, or until the "under paid" material
handler forgets to load the hopper or vacuum auto loader bucket and we start
producing nice steamy moisture streaked parts!! :o((
Wayne
----- Original Message -----
From: "David Ricker" <
ricker@inherentsys.ca>
To: <
murphy-rebel@dcsol.com>
Sent: Sunday, November 09, 2003 12:26 AM
Subject: Re: Engine Air Dryer, was: Re: Gear Warning System
Yeah, I kind of wondered how long before the dessicant would drop below
the
"effective" level, your PC dryer experience is a good benchmark. Like Ken
said
too, there would also be issues with the things outside the crankcase.
I would have thought just heating the resin pellets for a time period
before
using would do the trick, this is how I have seen it done for
thermo-forming PC
sheet. How long does it take to dry a batch of pellets with your system?
Dave R.
"Wayne G. O'Shea" wrote:
I figure about good for the first day of circulating air and then if you
didn't put the dessicant into the oven and reload the pepsi bottle you
would
just be getting wetter and wetter air circulaing through out the engine.
We
use dessicant driers on our injection moulding machines to predry
nylon/poly
carb/engineering resin/etc pellets before melting them. The unit
switches
back and forth between dessicant beds, about every 15 to 20 minutes, to
absorb the materials moisture in one bed while drying the other bed
using
heaters. Any longer than about an hour through one bed and instead of
drying
the material it starts adding all the humidity in the building to the
material, making things much worse than if you had of just dumped the
bag of
raw material into an open hopper.
Wayne
----- Original Message -----
From: "David Ricker" <
ricker@inherentsys.ca>
To: <
murphy-rebel@dcsol.com>
Sent: Saturday, November 08, 2003 7:07 PM
Subject: Engine Air Dryer, was: Re: Gear Warning System
are
also
offering on their site? The idea is to pump de-humidified air through
the
engine between flights to keep the moisture content low thus keep the
engine
from rusting. Anyone have any industrial experience that would say if
this
would work? Basically they are using a container of dessicant to dry
the
air.
If it is for real, wouldn't this solve the corrosion problem for
engines
not
flown a lot? Any flaws in the theory?
Cheers,
Dave
Alan Hepburn wrote:
of
Function
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David A. Ricker
Fall River, Nova Scotia
Canada
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David A. Ricker
Fall River, Nova Scotia
Canada
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