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BATCH BASKET MILL
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| Overview
of Basket Mill |
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Basket Mill complies
with modern grinding technology, Instead
of one or two passes through the mill
with reduced throughput; it is more
effective to increase the number of
passes with higher output. In fact,
it is proven that the disadvantage of
a continuous mill (vertical or horizontal)
is that the residual time of the different
pigment particles is not the same. Some
particles stay longer in the grinding
chamber whereas others will exit more
quickly. A Basket Mill system on the
other hand has a combination of expulsion
and suction, ensuring that the entire
base product passes through the grinding
chamber many hundreds of times during
the operation and is progressively uniformly
processed.
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| At
the end of the process, the finesse spectrum
is very narrow and the color strength is duly
achieved. |
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| Advantages
of the Basket Mill |
- Coating products can
be manufactured from start to finish using
the same container; the premixing operation
is reduced to a minimum.
- The grinding process
can be carried out entirely in automatic
mode. No supervision is required.
- If viscosity is increased
during grinding, binder or solvent can be
added to the mill base without stopping
the process and transferring back to a mixer.
- In comparison with
the conventional mills, the Basket Mill
System is highly efficient; therefore, grinding
times are greatly reduced.
- The chamber is designed
as an open system so that media remains
in a floating state. Therefore, flotation
and compression are no longer a problem.
- Replacement of worn
media can be carried out in a matter of
seconds without removing any parts.
- Cleaning is very easy
and quick. Following the Grinding operation,
the basket is raised out of the process
material, partially emptied by the slow
running the disc and then finally submerged
in the cleaning solvent.
- Basket Mill is virtually
self cleaning when its runs for a few minutes
in a suitable solvent.
- In respect of color
changes, 10 to 15 minutes are enough to
pass from one batch color to another.
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| Design
Highlights |
- Basket Mill has all
the advantages of our world renowned mixer-dispersers
with elevating rams and infinitely variable
speed controls.
- All parts coming into
contact with the media have smooth extremely
hard surfaces, which result in minimum wear.
- All parts coming into
contact with the material being processed
are of high micro finished stainless steel,
to reduce cleaning down time.
- A pressurized lid
enables processing in a controlled atmosphere
or vacuum.
- The grinding chamber
is fitted with a specialized jacket for
the circulation of cooling water. This cooling
system effectively dissipates heat during
the grinding operation and efficiently decreases
the temperature of the product during the
grinding.
- Alternatively the
interchangeable dispersing/grinding vessel
is fitted with a spiral flow water jacket
for optimum temperature control.
- Should the machine
be required to run at less than maximum
capacity the above design also facilitates
operations with a smaller batches.
- The motor is driven
by a two speed motor or by a frequency inverter
with infinitely variable speed.
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| Environment |
| Our
Basket Mill can work under vacuum. The
vacuum cans de-areate the material to
be processed, decrease viscosity, modify
thyxotropy, in other words improve rheological
properties of the base product.
The basket mill works
in a closed system as a sealed unit.
There is no risk from loss of solvent
and consequently prevents contamination
of the environment.
Our Basket Mill
shows that the sole of the environmental
problem is to avoid the need for removal
of all emissions by not producing them
in the first place.
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| Grinding
Media |
| Milling
time is directly proportional to the diameter
and density of Grinding Media. The number
of contact points in a given volume depends
on the diameter of the beads. Small media
particles are important to obtain better
grinds.
Grinding Media
with high density is suitable for formulations
of high pigment concentration. However,
all kinds of Grinding Media such as
glass, steatite, zirconium oxide and
steel can be used.
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