Dynisco LMI5000, Руководство по эксплуатации

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From lab to production,
providing a window into the process
-39-
Cleaning Up
If using hand weights without the lift system, push down slowly on the weight and purge any
material remaining in the barrel through the die and out of the barrel. If using a weight lift system,
you may want to turn off the “Auto Raise” feature to allow the test weights to dwell at the end of
the test and purge any remaining material from the barrel. Remove the piston 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 the rod which may lead to a very hot die coming off
and travelling through the air or onto the floor or some other undesired location.
While wearing protective gloves, wipe the piston rod with a cotton rag. Remove
the die with the die removal tool. Put two cleaning patches directly over the barrel
about 1/2 way overlapped and, using the cleaning tool, push the patch down into
the barrel. Run the patch up and down a half dozen times or so, and then repeat
the process. A minimum of two sets of patches are generally needed to clean the
barrel properly, however, some materials are harder to clean that others. Repeat
the process until used patches come out clean. When the system is clean, put
the die and piston plunger back into the barrel. This allows the piston plunger and
the die to reheat before the next test.
With materials that are thermally stable (less than 5% viscosity change over 1/2
hour of heat exposure) we recommend only cleaning the barrel between every
second run. For materials that degrade or are moisture sensitive it is
recommended that both the barrel and the die be cleaned completely between
each test. To clean the die, use the die removal rod and push the die up from the
bottom of the barrel and out the top. Wipe it with a 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 sample 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 inserted when the die is removed and the
material starts to solidify.
USER TIP: Experienced users often listen for a double bounce of the die when they drop it back
into the barrel to know that the barrel is clean.
Also, while the die is out of the barrel, look down the barrel bore to be sure it is
clean (use safety glasses when looking down the barrel and beware of noxious
fumes that may come from heated material inside!). Ensure the inside surface of
the barrel is smooth and shiny when completely clean.
P/N: M0726(3)
| Rev: 012020 | ECO: 51182
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