Tinius Olsen MP1200 Extrusion Plastometer Page 10-5
Operation Manual # 02002215
10.4 Operation:
The Pneumatic Purge/Cleaning Attachment can be used manually or automatically through
the optional Software Package.
10.4.1 Manual Operation:
The purge feature can be used prior to a test to purge the test charge to a predetermined
starting point. The operator will charge the material into the bore and start the test, lowering
the WLD platform to a predetermined height (set by manually programming the MP1200
controller in the PROGRAM mode). The purge feature is then manually operated by
pressing the ACCESSORIES key and then by pressing the PURGE key. When the PURGE
key is pressed, the key will remain highlighted, and the ram will lower until it is stopped by
the weight contacting the WLD platform. This purges any excess material before a test. At
the end of the programmed Release Time period,
the WLD platform fully lowers and the test will
continue normally until its conclusion. At the end
of the test, the purge feature can be used again to
purge the remaining material from the bore.
The cleaning feature can be used after a test to
assist in cleaning the bore. After the WLD platform
is raised to its top position, the operator can use the
Piston Extractor Tool to remove the piston rod from
the bore by pressing the ACCESSORIES key and
then the CLEAN key to extend the cleaning cylinder
down. Slide the open end of the extractor tool
under the shoulder of the piston rod and insert the
extractor tool handle into the cleaning cylinder end
(as shown in Photo #4). Press the CLEAN key
again to retract the cleaning cylinder, pulling the
piston rod out of the bore. Remove the piston rod
and extractor tool. The operator can then use the
cleaning feature to assist in cleaning the bore of the
barrel. Place a patch in the center of the bore.
Position the extended cleaning tool by placing the
knurled tip into the top of the bore with the patch,
then inserting the handle into the cleaning cylinder
end and pressing the CLEAN key once to go down
and again the retract. Always be sure that the tip of
the cleaning tool in engaged in the end of the bore
before pressing the CLEAN key to go down. This
can be repeated with the same patch or a new
patch until the bore is clean. Sometime it helps to
rotate the extended cleaning tool by hand during up
and/or down stroke.
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