Transcript SICOMA AVANTI TWIN SHAFT MIXER THE MOST INCREDIBLE …

SICOMA AVANTI TWIN SHAFT
MIXER
THE MOST INCREDIBLE VALUE IN A
MIXER TODAY
• The Sicoma Avanti concrete
mixer was designed in Italy 50
years ago; it has been refined
to give you the outstanding
product that you see today.
The Avanti mixer is the most
widely used mixer in the world
today; over 1400 in use in
ready-mix, precast, block,
paver and dam
applications. Avanti produces
over 1 million cubic yards of
concrete every day. Its
compact size allows it to be
retrofitted into existing plants,
in most cases doubling
throughput without the need for
two mixers and splitting of
material feeds.
• The art in concrete mixing is to make a batch of concrete quickly
and completely. The Avanti's powerful compulsory mixing action
throws particles from each side of the mixer into the center, where
they combine; the water is forced through powerful jets into the mix,
where it is absorbed completely, allowing the cement slurry to coat
all the aggregate particles uniformly, forming the strongest concrete.
• Because the mixing occurs in free space above the mixer floor, the
wear on the liner plates is very low; the outer 70% of the lined
surface is rarely touched by concrete. Only the rows of tiles close to
the discharge door will need replacement and you’ll be surprised at
how long they last.
• Avanti’s features go farther than any other mixer of its class. Its
strong frame, air purged shaft seals, harder liner plates, more
efficient gear reducers and electronic alarm unit as standard
equipment mean that you have peace of mind. And our 5 year
warranty show you that we are very confident in its reliability!
AIR PURGED SHAFT SEALS
• The long-life grease-impregnated
seals should never see any dirt; air is
bled into the cavity inside the mixer
constantly, forcing concrete particles
back into the mixer and away from
the seals.
• If the seal should ever fail, positive
separation of the bearing from the
seal prevents contamination of the
bearing.
• The shaft seal is made from two
hardened steel rings under spring
pressure, impregnated with grease to
ensure perfect sealing and many
years of life.
DISCHARGE DOOR
• Hydraulically operated,
the door has 3 adjustable
stopping positions to
regulate the flow when
necessary. Wear of the
double rubber seal is
automatically
compensated by the
closing cylinder. The door
is bolted to the radius
arms, allowing removal
for maintenance without
dismantling bearings and
actuator.
EXTRA-HARD LINER PLATES
• Brinell 630 Ni-hard tiles give 40% longer life with extraabrasive aggregates; offset joints decrease wear by a
further 30%. All tiles are identical and all mixers use the
same size, reducing stock and simplifying installation.
MIXING ARMS
• Cast from spheroidal cast
iron with streamlined
design to minimize
buildup, they are set at
90° angles to give fastest
mixing while minimizing
stress of the shafts.
Paddles are Brinell 630
Ni-hard cast iron. Collars
between arms prevent
material buildup on shaft
and act as spacers during
assembly.
GEAR REDUCER AND BEARINGS
• Avanti’s high-efficiency 2stage design does not
require a cooler, even for
24 hour 7 days a week
continuous duty.
Gearboxes, bearings and
their seals are oil-bath
lubricated. V-belt motor
drive absorbs shock
loads while positive
coupling between the two
drives synchronizes the
shafts.
ONE-DAY SHAFT
REPLACEMENT
• Unlike others that require several days to remove and
replace power train components, Avanti can be stripped
down and rebuilt in hours. If you ever have to replace a
gear reducer or shaft seal, you are done in a day – not a
week!
MOTOR DRIVE
• V-belt drive absorbs shock loads while positive coupling
between the two drives synchronizes the
shafts. Gearboxes are coupled to the shafts through
flexible joints to eliminate misalignment and wear under
heavy loads
ELECTRIC GREASE PUMP
• Constant lubrication of bearing
pivots and shaft seals ensure
trouble free life. Discharge
door and actuator pivots are
lubricated manually from a
single location. Since the
pump is electrical rather than
mechanical, it can be cycled
on and off to dispense just the
amount of grease needed. In
comparison, mixers with
mechanical pumps cannot be
adjusted and can often
dispense too much grease into
the seals, contaminating the
concrete as a result.
HYDRAULIC POWER UNIT
• The discharge door is
operated hydraulically
by the built-in power
unit. A manual lever
allows the door to be
opened if power is
lost.
EXTRA FRAME STIFFENERS
Special box sections unique to
Avanti’s extra-rigid design hold
mixer shape and maintain shaft
alignment during heavy mixing
periods. Compare with lighter
designs; Avanti's resistance to
twisting preserves the full life of
seals and bearings, making it one
of the most reliable mixers in the
world today.
MIXER COVER AND WATER DISTRIBUTION
Included in the standard mixer price, the cover has built-in water pipes and
jets designed to give high-speed water addition with optimum distribution,
giving the fastest mixing time.
ACCESS HATCHES
The standard cover includes two hatches for easy access, located on
either the front or back. Two inspection ports are also included, built into
hatches. All hatches are fitted with safety switches as standard
equipment.
HIGH PRESSURE WASHOUT
• The optional high-pressure pump, together with a
separate motor driven rotating shaft with spray nozzle
system , forces water at 900 psi and 50 gallons per
minute into every corner of the mixer while it rotates,
cleaning it in minutes. A high pressure wand is also
provided for catching the more inaccessible
areas. Alternatively, to almost eliminate the need for
end-of-day cleanout, the system can be used as an interbatch rinse, the waste water being used in the following
batch.
BATCHING CONTROLS
Scale-Tron’s BATCHTRON series controllers take
advantage of Avanti’s high mixing speed to give you more
throughput per hour. Easy to operate and set up, Avanti’s
mixing sequence can be programmed in different ways
for different formulas.
LOAD CELL MOUNTING HOLES
Entire mixer can be weighed for
checking batch weight and verifying
complete discharge. Contact plant
for details.
AVANTI GUARD
Standard on all models, Avanti Guard alarm unit indicates low levels of
lubricants and hydraulic fluid plus overtemperature in gearboxes and
hydraulic pump. Faults are indicated by an alarm light which connects to
the control system for automatic shut-down.
• MIXING ACTION
• The counter-rotating
blades are angled at
45° to throw the mix
towards the opposite
side of the mixer while
imparting an axial
motion at the same
time. This shears the
mix, creating a faster
mixing time than any
other mixer type. 95%
homogeneity is
reached within 30
seconds, allowing a
mix time of 30 seconds
for slump concrete and
60 seconds for dry
cast.
• Discharge is complete in an incredible 10 seconds,
giving a total mixing cycle time of typically 70 seconds
for wet cast and a little longer for block, pavers and pipe.
Ready-mix can be produced even faster if sand, cement
and water are pre-mixed while stone is blended through
the mixer during discharge, with final mix being
completed in transit. The result is better quality and
higher strength concrete than with transit mixing alone.
• There are no dead zones within the mixer; the vigorous
motion of the mix ensures that material in the unswept
area above the door is moving at all times while
eliminating segregation when using lightweight and other
special aggregates.
MOISTURE CONTROL
• Most models of microwave moisture
sensor can be mounted in the end
structure, below the bearing. Scale-Tron’s
microwave moisture systems give you
ultimate control of moisture for both wet
and dry cast concrete.
THE AVANTI MIXING CYCLE
Although the total cycle time is dependent on the
speed at which the charging takes place as well as
the type of concrete being produced, typically a
batch of wet cast or ready-mix concrete can be
produced in 70 seconds, with dry cast, block and
paver mixes taking a little longer. The short total
cycle time allows many plants to be upgraded to
give double the output by replacing the mixer
only, compared with adding a second mixer, which
requires extra conveyors, chutes, holding hoppers
and often an increase in elevation of bins and
weigh hoppers.
•
•
•
•
•
•
•
•
Charge aggregates
10 sec
Refill
Charge cements
15 sec
Refill
Charge water
25 sec
Refill
Charge admixes Air Other
Refill etc.
Mixing time
30 sec
Discharge time
10 sec
Door close
Total cycle time
Beginning to end = 70sec
TECHNICAL DETAILS, ENGLISH / METRIC:
MODEL
AV1500
AV2250
AV3000
AV4500
AV6000
Dry filling capacity (aggregates), cu. yd. / cu.m.
1.95 / 1.5
2.94 / 2.25
3.92 / 3.0
5.89 / 4.50
7.85 / 6.0
Yield, uncompacted concrete, cu. yd. / cu.m.
1.56 / 1.2
2.35 / 1.80
3.14 / 2.40
4.71 / 3.60
6.28 / 4.80
Yield, compacted concrete, cu. yd. / cu.m.
1.3 / 1.0
1.95 / 1.5
2.6 / 2.0
3.9 / 3.0
5.2 / 4.0
Time per cycle (loading excluded), seconds
70*
70*
70*
70*
70*
Uncompacted concrete per hour, cu. yd. / cu.m.
74 / 57
120 / 92*
161 / 123*
241 / 184*
322 / 246*
Compacted concrete per hour, cu. yd. / cu.m.
62 / 47
100 / 77*
135 / 103*
201 / 154*
269 / 206*
Mixing motors and power, HP / KW
30 / 22
2 x 40 / 30
2 x 50 / 37
2 x 55 / 41
2 x 100 / 75
Yes
Yes
Yes
Yes
Future
27.7
24.3
24.3
24.3
Skip hoist available?
Mixing shaft speed, rpm.
Number of mixing blades
12
12
16
20
24
Number of scraper blades
2+2
2+2
2+2
2+2
2+2
Overall depth, inches / mm
82 / 2080
95 / 2320
95 / 2320
106 / 2600
106 / 2600
Overall width, inches / mm
116 / 2959
123 / 3000
143 / 3500
165 / 4050
184 / 4500
Height without cover, inches / mm
58 / 1480
65 / 1600
70 / 1707
70 / 1725
70 / 1725
Height with cover, inches / mm
74 / 1880
85 / 2070
89 / 2182
89 / 2182
89 / 2182
Weight of empty mixer (without skip), lb / kg
11,130 /
5050
16,400 /
7430
16,600 /
7530
20,300 /
9200
24,500 /
11,120
• Copyright 2000-2005 Scale-Tron Inc. 440-19th Ave,
Lachine, QC, Canada H8S 3S2
• Phone: +1 514 634 7083
Fax: +1 514 639 6945
Email: [email protected]
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