Test Procedure; Check That The Barrel Is Clean - Ametek Davenport PET Plus User Manual

7.2 TEST PROCEDURE

The test procedure consists of the following actions:

Check that the barrel is clean

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Prepare a clean follower and filling funnel
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Clean the die bore
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Purge the barrel with nitrogen gas
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Insert the polymer into the top of the barrel
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Insert the follower into the top of the barrel
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Press the GO key
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Apply pressure to the top of the follower using the charging tool for one minute
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Fit the probe to the top of the barrel
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Wait until the test has finished
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Clean the barrel, die and follower
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7.3 CHECK THAT THE BARREL IS CLEAN
Fold a cleaning patch in two then place over the tip of the barrel cleaning tool. Push the cloth into the
top of the barrel using the tool and push the tool down completely through the barrel.
Carefully remove the cloth from the barrel cleaning tool and withdraw the tool upwards.
Visually inspect the barrel and, if necessary, use another cleaning cloth until the barrel is completely
free from polymer and the inner bore is shiny.
cAUTIoN: The cloth and barrel cleaning tool may become hot during the cleaning
process. Wear heat protecting gloves when handling these items.
Polymer fumes may be emitted from the top of the barrel during the visual examination
process. Wear protective glasses or goggles when viewing the interior of the barrel.
42 PET Plus User Manual