The premier sealing jaws and forming collars for your packaging needs.
SPRING 2004
Ask SWE
H
ow can I check to see if heat
is being distributed evenly
along the sealing jaws?
ONE METHOD involves using a
digital temperature probe or an
infrared thermometer to measure
the temperature of the sealing
face in two-inch increments.
Another, more visual, test is to
use heat-sensitive "tipi" paper. This
paper changes color when it comes
in contact with heat. You can obtain
this visual representation of your
heat profile by placing a sheet of
tipi paper between the heated seal-
ing jaws as the jaws close. The
resulting blue-shaded impression
gives you an indication of the heat
profile. A uniformly shaded paper
indicates a uniformly heated jaw.
If some areas are darker or lighter
than other areas, it's time to consid-
er making a change to your sealing
jaws. Note: Please use exteme cau-
tion when working around heated
jaws. These jaws are a burn hazard,
as well as a crush hazard.
Make heat testing a routine part
of your seal maintenance program.
And if you have questions or need
help, call Southwest Endseals.
We're here to help!
Heat pipes -
from satellites
to sealing
jaws.
Heat pipes use vaporization to
transfer heat quickly. They can
be manufactured in almost any
size and shape and have an
effective thermal conductivity
ten times that of solid copper.
In this illustration, the heat pipe
appears at left inserted into the
sealing jaw to evenly
distribute heat.
Call Southwest Endseals
for consulting services
Let us put our knowledge to work for you.
Here are just a few of the ways we can sup-
port your business:
If you have a particular seal or hole punch
issue, send us the film and let us evaluate it
and make recommendations.
Let us test your sealing patterns to deter-
mine the best ones for your applications.
Our superior design and engineering capa-
bilities allow us to completely redesign a seal-
ing jaw assembly if necessary.
We can also conduct sealing jaw seminars
to keep your staff up to speed.
HEAT PIPES -
WHAT'S AT STAKE?
* More consistent sealing
* Lower operating temperatures
* Thermal stability
* Higher productivity
* Fewer seal failures
Our
capabilities
range from
engineering to
mechanics and
our expertise
ranges from
materials to
computer-aided
design.
Over our years
in the industry,
there's hardly a
packaging
problem we
haven't seen
- and solved.
In sealing equipment, tempera-
ture uniformity is essential. A heat
pipe, also known as an "isopipe,"
evenly distributes heat across the
entire surface of the seal face.
Southwest Endseals -
your heat pipe experts
Heat pipe technology is the very
best way to achieve temperature
consistency in sealing jaws.
With
no moving parts, heat pipes are
highly reliable, offering significant
maintenance economies and
improved efficiencies over variable-
wound cartridge heaters. And they
can be installed in almost any jaw
relatively quickly.
At Southwest Endseals, we are
knowledgeable in this technology.
Rely on us for advice about which
applications are most appropriate
for your sealing needs. Whether
you're having difficulty maintaining
even heat distribution or just want
to know more about heat pipes,
give us a call at
866-832-1454.
I
N ITS EARLY DAYS, NASA
had a particularly thorny
problem to deal with. The
sun-facing surfaces of its
satellites would become very
hot, while surfaces not exposed
to sun would get extremely cold.
The wide temperature variations
threatened to derail the satellites'
entire electronic systems.
The solution? NASA worked with
Los Alamos Scientific Laboratory to
develop heat pipe technology.
A heat pipe is a tubular device in
which a fluid alternately evaporates
and condenses, transferring heat
from one region of the tube to
another. Heat pipe technology is
now used in almost all spacecraft.
Meanwhile, back on Earth
Like other spinoff applications from
NASA, heat pipe technology found
a broad range of applications closer
to home. It is an especially practical
solution within the package seal
industry.