and mold were flipped upside down onto a piece of wool felt (I found an old army blanket and cut it up).
Vacuum boxes checked for plugging, deckle
wear, end unusual wear.
com) will exhibit the Moebius-manifold die with a patented internal deckle
is a mechanism that varies product width by blocking off portions of the flow at either end of a flat die.
The shape of the paper is dependent upon the shape of the mold and deckle
that are used to form the sheet.
reportedly provide more effective seals than internal deckles
(the main advantage of which is their more streamlined diversion of melt flow).
While standard internal deckles
with edge profile control do a good job of reducing edge bead with the high-melt-strength resins like LDPE, they have been less effective with linear polymers such as LLDPE and PP and with more expensive functional copolymers such as EVA, ethylene-acrylic acid, and ethylene-methyl acrylate, Nordson says.
Internal and/or "pinch" shim deckles
may be used to control the curtain width entering the nipping area while avoiding protrusions from the die surface, so as not to force the distance to widen.
One makes the large width adjustment of both internal and external deckles
in tandem; a second, smaller motor repositions the internal deckle
blade to reduce edge bead.
It also controls layer width more accurately with deckles
to keep sticky PP copolymers out of tenter clips in OPP, for example.
first exhibited the leakage-reducing combination of external and internal deckles
in a single-action mechanism at Interplas in the U.
Processors often run webs narrower than a roll stack without bothering to install deckles
on the ends of the die.