for the food processing industry
DORNOW Roller Peeling Machines of the R-OW Series in the
Potato Processing Industry
construction of the rollers was chosen in a way that
both an aggressive
peeling (when using bad or even scurfy raw material)
and a „gentle“ skinning (e.g. of new potatoes or cooked beetroot) is
practicable. - The granulation of the coating on the
rollers has to be accordingly selected.
construction of the machines of the R-OW series offers
a broad range
of possibilities to optimise the desired peeling
effect; this also goes for tubers and root vegetables
with a totally different skin structure: celeriac,
kohlrabi, waste potatoes that have been sorted out,
fodder potatoes, new potatoes, cooked beetroot,
were times when the potato processing factories could
only get „fodder potatoes“ on the market, which
are not normally used anymore for human food. Still,
the DORNOW roller peeling machines of the R-OW series
could and can, given an appropriate equipment and
adjustment of the peeling rollers, make rapidly a
usable produce from raw material of inferior quality...
DORNOW roller peeling machines are designed to give
also good service in bad times as far as the quality
of raw material is concerned...
the surface of the rollers provide - due to their
three-dimensional working - for a steady and constant
whirling of the tubers and a smooth peeling. - It was
our intention to arrange the rollers in a stationary
way which has many advantages.
dispensed with superfluous technical appliances and
(e. g. with rotating drums in which, again, there are
a lot of turning rollers). Thus, we were able to avoid,
from the beginning,
the use of many possible wear parts. - Certain
constructional features that seem to be useful and
appropriate at first sight and arise astonishment
because of the way the technical components are
arranged, do not necessarily
prove good and efficient.
DORNOW roller peeling machines of the R-OW series have
a very sturdy
construction. They are predestinated for a 24-hours
service. The low-noise operation of the machines is
guaranteed even with fast-rotating peeling rollers.
They are extremely robust and have a very long service
far as the choice of an adequate machine size is
concerned, we recommend to opt for a
higher-dimensioned machine so that you can yield good
results even with bad raw material. The machines are
available with volumes
(diameters) in the range of 500, 600, 900, 1,100,
1,300, 1,500 and up to 2,500-mm and with peeling rollers
up to 4,000 mm
high performances are achieved, accordingly, in one
machine of a piece. (It is not necessary to connect two or three machines in
stepped arrangement). Thus, you have less rotating
parts and you need less spare parts!
roller peeling machines in stepped arrangement (here,
e. g. three smaller roller peelers are connected in
longitudinal direction), the peeling rollers run, for
example during the peeling process, to the right,
while they have to rotate in the other direction for
the emptying of the various sections. There is the
risk that e. g. carrots and potatoes get stuck for
some time which causes unnecessary abrasion.
the peeling rollers of the DORNOW roller peeling
machines of the R-OW series have a large diameter.
This preserves the bearings and guarantees low-noise
have a double
protection against humidity and dirt and are
outside the wet zone. They are, moreover, treated
of the products to be peeled allow peeling without
water/waste water. This means, as a rule,
considerable savings in costs. - The peeling pulp
produced, for example, when peeling potatoes, is
collected at a central point in a chute and can be
moved by means of e.g. a pump. For non-floatable „dry“
waste a screw conveyor (auger) or a conveyor belt is
mounted beneath the machine.
consist of elements and can be opened and closed. -
V-belts, guide pulleys and bearings are subject to
very little wear and tear.
to the possible micro fine grain peeling, the carrots, potatoes etc. leave the
machine as smooth as though they had been peeled by
steam. Thus, they absorb considerably less oil during
the frying process. - (Advice for laboratory
test: „Peel“ the potatoes with a very fine
emery paper to obtain a smooth surface. On the other
hand use potatoes that have been peeled in the normal
way with coarse carborundum. Then cut both lots and
fry them in the test fryer. Determine the oil
need of expensively produced compressed air,
no compressor. These unnecessary high costs have to be
added to the purchase price of such machines that work
with compressed air. - As for constructions connecting
roller peeling machines arranged in steps, in
longitudinal direction, these machines (or machine
parts) are separated from each other by long flaps
which are constantly opened and closed by compressed
air. We have done without such constructions, because
we think they are expensive gadgets. As to the DORNOW
machines of the R-OW series: continuous and low-noise
operation, controlled by adjustable worm drives.
constant and virtually useless stop-and-start
of several peeling roller groups in the DORNOW roller
peeling machines of the R-OW series! We renounced the
design that necessitates this unjustifiable
constructional expenditure, because it increases the
one peeling process the three groups of rollers are
set in motion six times (three times to the left,
three times to the right) and stopped three times, too!
The unnecessary energy costs have to be added to the
purchase price of machines of such a type. It is a
matter of fact that the starting of a machine costs a
lot of electrical energy.
discontinuous system! The potatoes are peeled in a continuous
lubrication of the bearings is possible.
working auxiliary tools
for removing the peeling rollers can be supplied on
peeling rollers can be mounted and taken out rapidly
by means of the fast-exchange
tool for rollers. This is true of the models of
the R-OW-A series.
mounting and dismantling of the peeling rollers will
hardly cause any difficulties, not even to those
technicians who have not yet had much experience in
standard model is provided with jets for atomised
water (water mist), divided into two groups (2/3 and
1/3) . Most of the products can be peeled without
addition of water.
required – it is, however, not necessary – one can
add some water to the machine, which does not
necessarily produce any waste water.
dry-peeled fruit have small particles on them. If you
wish to remove them totally, we can offer you various
DORNOW roller peeling machines of the R-OW series use
ø 150 mm rollers. The roller peelers of the "100"
series have peeling rollers with a diameter of 100 mm.
It was DORNOW who built the first roller peeling machines in
25 years of experience in this field are at your service.
In addition to this treatise we can make available more
papers dealing with the subject of PEELING.
paper contains non-committal notes. We do not lay claim to
completeness. Alterations reserved.
Our order confirmation, accepted by our customers, is in
effect upon delivery. The presentation of a new edition of this treatise will
substitute for any previous versions.
by DORNOW food technology GmbH, D-40549 Düsseldorf
Dornow food technology GmbH,
D-40549 Düsseldorf - Germany, USt-Id.-Nr. DE119264470
Tel. ++49-211-527060, Mobile ++49-172-2614932,
Fax ++49-211-596883, email email@example.com,
AG, Konto-No. 1452333, BLZ 300 400 00, Managing Director Karl-Dietrich
Dornow, Amtsgericht Düsseldorf, HRB 22597