deviation and coefficient of variance can be printed once, when the
END
key is
pressed.
Cleaning Up
User Tip #1
User Tip #2
Push down on the weight and purge any material remaining in the barrel.
Remove the rod by twisting it clockwise to break the seal created by the molten
plastic then pull straight up.
Warning: If you pull the rod out too quickly you
may cause a suction that pulls the die out along with it.
Wipe the plunger rod
with a cotton rag. Remove the die with the die removal tool and clean with the
appropriate cleaning tools. Put two patches directly over the barrel about 1/2
way overlapped. Using the cleaning tool, push the patch down into the barrel.
Run the patch up and down a half dozen times or so, then repeat the process.
The second set of patches should come out fairly clean, if not repeat the process
until they come out clean. When done, put the die and plunger back into the
barrel. This allows the plunger and die to heat up before the next test.
With materials that are thermally stable (less than 5% viscosity change over 1/2
hour) we recommend only cleaning the barrel between runs of the exact same
material. For materials that degrade or are moisture sensitive, we recommend
cleaning both the barrel and the die completely. To clean the die, use the die
removal tool to push the die up from the bottom of the barrel and out the top.
Wipe it with the cotton rag and clean it by running the drill bit through it several
times. Remove material that collects in the grooves of the drill bit and repeat
until the drill passes easily through the die. Scrape the die with the cutting knife
if needed to clean the top and bottom faces. For materials that crystallize
quickly, you can clean the die by first running a drill bit up into the die while it
is hot and in the indexer. This will make it much easier to get the cleaning drill
bit in when the die is removed and the material starts to solidify.
While the die is out, put on safety glasses and look down the barrel bore to be
sure it is clean. A clean barrel will have a mirror-like shine to it. If it is not run a
couple of patches up and down it before putting the die back into position.
User Tips:
Drop the die into the barrel and listen for it to double bounce off of the bottom
of the barrel. If the barrel is dirty, the die hangs up and will not bounce when it
hits the bottom of the barrel.
If you are using a PVC die (D3364 unstable materials) be sure to get the
material out of the conical top section. (standard dies have a flat entrance and
exit). .
When the die is out of the barrel it cools down quickly. The longer it is out, the
longer one must wait for the temperature to stabilize. Minimizing the time the
die stays out of the machine will increase the number of tests you can run.
When the temperature on the front display is within 0.2 C of the set point you
can begin your next test. Loading material will cause a small temperature
change even if the temperature steeping was locked in. The melt time (360
seconds) will allow ample time for the temperature to reach the steeping before
the first data point is collected.
Series 4000 Melt Indexer Operation Manual
Method "A" Run
25
