Reference Manual

17−12
spool and the primary arms return to their original
position.
Winder
The purpose of the winder is to cut and wind the
full-width, large diameter paper reels into suitable
sized rolls. These rolls may then be wrapped and
sent directly to the customer or may be processed
through subsequent coating, calendaring, or
sheeting operations. During winding, the two
edges of the reel are trimmed off and conveyed
back to the dry-end pulper, or broke pulper.
The full-width machine reel is transferred from the
reel stand to the unwind stand by an overhead
hoist. From the unwind stand, the paper is
threaded through the web-tensioning rolls, the
adjustable slitters, adjustable spreader bar and
onto fiber or plastic cores. Typically, a steel shaft
is inserted through the cores to provide a locking
arrangement. However, some of the newer
winders operate “shaftless” by providing a
retaining surface on one side to prevent
cross-machine wandering.
The winder drive must be capable of speeds of
two and a half to three times faster than the paper
machine in order to have time to change rolls,
change reels, repair breaks, remove defective
paper, set up the slitting arrangement, and adjust
the spreader bar.
Roll Finishing
The steps in roll finishing are scaling, wrapping,
crimping, heading, and labeling. Each of these is
done manually at one time. Today, most wrapping
operations are carried out semi-automatically, and
the labeling function is handled by a data
processing print unit.