SANDING & FINISHING
ARMINIUS Tooling Inc.
P.O. Box 68, FORESTON, MN 56330
tel. + 1 320 294 5900
fax + 1 320 294 5902
e-mail : info@Arminius Tooling.com
Internet : www.Arminius Tooling.com
QWhat is a segmented platen?
scratches, an additional sequence of
60-, 100- and 120-grit sanding belts
must be run to achieve the same
finish as that produced by a planer/
sander running one knife head and
one sanding belt.
AWhen sanding veneered panels or sealer/lac- quer, utmost control is
required. To accomplish this, the
platen is made up of individual
segments; each of which receive
sanding pressure separately
(pneumatically or electronically).
These segments are controlled by
a CNC controller that, along with a
sensing unit, can be programmed
to activate only when needed. By
doing this, you have the ability to
conform to the irregularities of the
panel to prevent sanding through
the sealer or veneer.
QWhen should a cross- belt sander be used in the operation?
AUsed primarily in veneer tape removal applica- tions, the cross belt
sander is designed to run across
the grain of the wood. Because
of this design, veneer tape is
removed with one head, whereas
two heads are needed with other
wide belt methods. Cross-belt
sanders also are used on long
panels in which the grain runs in
the narrow direction, such as desk
tops and front panels. In process-
ing these, the cross belt is located
on the out feed of the machine, so
the scratch pattern produced by
the belt goes with the grain.
QWhat are hold down shoes, and when do I need them?
AHold down shoes in a wide belt sander are simi- lar to chip-breaker shoes
in a planer. They are used to control the part as it passes through
the machine, prevent dubbed or
sniped leading/trailing edges, and
to allow for shorter parts to be run.
Specific uses are: short or narrow
parts, parts under 1/4 inch thick,
veneered panels, or any time you
need to hold tight tolerances.
QWhen should a vacuum belt be used in feeding a sander?
AThere are two circum- stances. The first is when you need to run parts
that are shorter than the distance
from the infeed hold-down rolls
to the outfeed hold-down rolls;
these parts may slip without using
vacuum. The second situation is
when sanding very thin or flexible
parts; parts with a thickness of less
than ½” will have a tendency to
bow and curl, while flexible product can be lifted into the sanding
head. The vacuum belt assists
the pressure rolls to flatten and
hold the parts during the sanding
Source: Timesavers Inc. For information
call 800-537-3611 or visit TimesaversInc.com.