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Sicoma |
Sicoma Strength PIGGYBACK HOPPER FRAME
Create a new batch plant quickly or retrofit an
existing plant with the assurance of a proven design;
Sicoma's piggyback system fits right on top of the mixer.
It gives you an aggregate holding hopper or scale, cement scale
and water tank or scale, all perfectly tailored to the mixer.
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To obtain the fastest mixing cycles and maximum throughput for
the size of mixer, it is essential to feed the
mixer at high speed. This
makes a skip hoist or holding hopper essential if the plant is a low profile
design with aggregate scale at ground level or lower. An inclined belt,
pocket belt or bucket elevator can lift the aggregates to the level of the
holding hopper. If the plant is high profile, vertical or tower type, the
aggregate holding hopper can be mounted on load cells to become a scale.
We can advise on the design as well as supplying the equipment from one of our
partner companies, giving you a guaranteed solution.
Note that on some models, the discharge gate mechanism prevents proper opening of the access covers. In these cases, access is possible from one side only.
Specifications:
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Aggregate holding/weigh hopper with hydraulically operated gate, powered by mixer power pack and 270W electric vibrator. |
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Cement weigh hopper with pneumatically operated slide gate, aeration jets, flange for vibrator and mounting hole for WAM air filter. |
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Water weigh tank with single pneumatically operated butterfly valve (regular scale or holding tank) or large and small valves (for decumulative weighing, fast/slow feed). |
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Connection flange on mixer top cover to fit optional air bag dust collector (strongly recommended). |
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All load cell and electrical connections brought to NEMA-12 junction box on frame. |
The piggyback frame is available in the following variations:
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Aggregate scale. |
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Aggregate holding hopper. |
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Water scale tank (one or two discharge valves). |
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Water holding tank (for use with meter, one discharge valve). |
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No water tank (use external meter, 3” for MAO4500, 4” for all others). |
Note that larger mixers require a large water volume and flow rate (500 gpm or more) if meter water is planned; if your water supply is inadequate, we recommend the water scale or holding tank.
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Piggyback hopper/tank capacities, English (gal or cu. yd.) / metric (liters) |
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| Mixer model | MAO 4500/3000 | MAO 5000/3350 | MAO 6000/4000 | MAO 7500/5000 |
| Water scale (gal/Liters) | 198 / 750 | 198 / 750 | 264 / 1000 | 264 / 1000 |
| Cement scale filling capacity cu. yd. geometric volume, cu. yd. |
1.43 / 1090 3.24 / 2476 |
1.59 / 1218 3.24 / 2476 |
1.90 / 1454 3.24 / 2476 |
2.38 / 1818 4.02 / 3076 |
| Aggregate hopper filling capacity, cu. yd. geometric volume, cu. yd. |
3.92 / 3000 6.60 / 5045 |
4.38 / 3350 6.60 / 5045 |
5.23 / 4000 8.44 / 6450 |
6.54 / 5000 10.52 / 8041 |
| Dust collection airbags | 2 x 2100 | 2 x 2100 | 2 x 2700 | 2 x 2700 |
The piggyback hopper frame is a guaranteed solution that maximizes mixer throughput and minimizes installation time. Ask us for customer references.
