From lab to production,
providing a window into the process
Loading and Packing Material into the Barrel
The piston rod should be inserted into the barrel during heating and temperature stabilization and between tests.
Remove the piston rod and lay on a cotton cloth. Check to see if the die is at the bottom of the barrel. Fill heat
chamber/barrel with an appropriate charge or use about 5 grams if nothing is known about the material. Put the
sample into a small beaker. Add about two-thirds of the material into the barrel, using a fill funnel. The loading
should be done in two increments, the first consisting of approximately two-thirds of the material. Tamp down
the material with the packing tool using approximately 20 pounds/9Kg of force. The packing tool can be driven
through the fill funnel. If bridging (clogging) of the material occurs in the fill funnel, slide the fill funnel off to one
side (without lifting) and use the fill tool to pack the material in the barrel directly. Move the fill funnel back into
place. The remaining material should drop down into the barrel. Repeat with the remainder of the material.
The Packer Option, if purchased, can be used to tamp down the material. Packer air pressure is set, depending
on material, to achieve the desired packing force. The packer must be enabled, through the System Configuration
screen. Material is loaded, as stated above, with a funnel. The funnel is removed. The packer is pivoted around and
held above the barrel. The packer’s push button is pressed to extend the packer rod down into barrel. The packer’s
push button is released. The packer rod is released and the entire packer assembly will pivot back to its starting
position. If a lift option is also installed, the lift will not lower if the packer is not back in its starting position.
Bubbles are present in the test sample charge if a snapping/popping sound is heard as the extrudate is forced
through the orifice. If bubbles appear in the extrudate, use less material between tamping down. If bubbles
continue, the sample may not be sufficiently dry.
Place the piston rod into the barrel by placing the piston rod directly over the slot/opening on the top of the
indexer barrel cover. Seat the guide bushing down into the barrel if it has not already fallen into place. The guide
bushing should be moving freely on the piston plunger. Place the desired test weight on the piston plunger rod.
The lift option can be used to lower weight onto the piston. The lift must be enabled, through the System
Configuration screen. On the test setup screen, Auto raise, Auto lower and Auto Hold can be enabled and used for
weight sequencing.
P/N:974179
Rev: 0918 ECO: 49667
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