Cleaning The Die Retaining Nut; Servicing The Polymer Chip Grinder - Ametek Davenport PET Plus User Manual

14.2 CLEANING THE DIE RETAINING NUT

Normally the die retaining nut does not require cleaning unless there has been a leakage of molten
polymer past the die "O" ring or the extrudate has lipped back and coated the underside of the nut.
Molten polymer can be removed by wiping with a piece of cleaning cloth when the nut is hot.
If the die retaining nut becomes completely encrusted with polymer, then the nut should be burned off
in a similar fashion to that described for the followers.
The sealing ring in the top of the die retaining nut should protrude above the level of the metal holder.
When worn down, remove the old washer by levering it out via the slot cut into the top of the nut.
Place the new washer into the circular recess around top of nut and press down firmly until washer is
evenly embedded.

14.3 SERVICING THE POLYMER CHIP GRINDER

Clean the grinder bowl and funnel using a vacuum cleaner or by hand using a soft brush and cleaning
cloth.
Check that the lubricator on the air regulator set
contains a suitable quantity of the correct grade
of oil, e.g. Shell Morlina 10 or Tellus R10.
Rotate the silencer cover on the rear of the
grinder slightly anti-clockwise then remove the
cover from the studs.
Carefully remove the foam element from the end
of the silencer then wash thoroughly in paraffin.
Dry the foam element then refit onto the end of
the silencer.
Refit the silencer cover.
Shown: Silencer cover
Shown: Foam element in Silencer
76 PET Plus User Manual