Select a sleeve size as a loose fit on
the roller but no larger than necessary. Slide over the roller. It may be
necessary to support the roller vertically or, if the roller is very long or
heavy, use a long tube fitted over one of the journals to lift one end of the
roll and allow the sleeve to be slid along the tube and then over the roll.
Position sleeve over roll so that approximately 25mm extends from each end.
Start shrinking with
hot air gun on high setting (200 to 300°C). Point the gun slightly away from
the direction you are shrinking to avoid premature shrinking which may cause
wrinkles. Slowly rotate the roll and gradually move along the roll shrinking
about 12mm each revolution. TAKE CARE to allow the free end of the sleeve to
stay loose and not to bind on the journal supports or the roll itself. The
sleeve normally lengthens during shrinking and a watch must be kept on the
growing free end.
Continue to shrink
past the shoulder of the roll and the sleeve will neck down to a smaller
diameter. This neck can then be trimmed with a sharp knife blade.
It is advantageous to leave the shoulder covered in this way as it helps to
secure the sleeve on the roll if it is not to be bonded in place. However if
necessary the sleeve can be cut flush with the end of the roll.
If the sleeve is to
be bonded with an adhesive, it must be etched at our factory on the inside
surface. For larger rolls the adhesive is injected under the sleeve after
fitting and then manipulated to spread it evenly across the whole surface
taking great care not to entrap any air. Smaller rolls can be painted with
adhesive before the sleeve is applied but adhesive selection is critical, as
many adhesive will pre-cure due to the heat of the hot air gun.
Advice should be requested from our technical department before bonding
etched sleeves to rollers.
Fitting Instructions for
Adtech Non-Stick Roller Sleeves
