Tinius Olsen MP1200 Extrusion Plastometer Page 14-9
Operation Manual # 02002215
into the funnel. Do not dump it in all at once as it will melt and stick to the
funnel. Press Start when finished.
NOTE: The ASTM D 1238 Method allows one minute to charge the cylinder, insert the piston, and
start the preheat time of test.
CAUTION: The funnel, when placed in the cylinder, can become extremely hot when the
machine is at operating temperature! The time that the funnel is allowed to sit in the
cylinder should be kept to a minimum.
14.3.7 After charging the cylinder, lightly tamp the material down with the charging
tool (P/N 02001582) in order to remove some of the trapped air. (Depending
on the amount of material to be charged, you may have to tamp the material
down more than once to load it all into the cylinder). Reinsert the piston, rotate
the PPDT clockwise so that the end of the arm is close to the piston rod, and
place the appropriate weight on the piston (either manually or with the WLD
(MP1200M only). Press Start to move to the next screen.
NOTE: Materials with high melt flows may require the orifice to be plugged in addition to
supporting the weight. Use the optional Tinius Olsen High Melt Flow Orifice Plug
(P/N 02001471 for standard D1238 die or 02001481 for “half-die”).
14.3.8 The next screen will countdown the previously entered preheat time. At the
end of the preheat time an alarm will sound (if enabled). At that time, the first
(lower) scribe line on the piston rod should be close to entering the guide
collar. If the scribe line has not entered the guide collar during the preheating
period, the amount of material charged should be reduced. Alternatively, the
material in the cylinder can be manually purged. Manual purging must end 2
minutes before the start of the first capture.
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