The big downside to the basic manual and PLC systems is that they seldom integrate the mixer with the other important upstream and downstream elements of the mixing
process, all of which are vital to the overall consistency and repeatability of the compounds.
Airless chopper, wet-out and gel-coat spray systems feature "no-flush" external mixing
and are reported to offer simple operation, built-in safety factors, and fast, efficient production.
The researchers focused on the mixing
behavior of particles in a hollow vertical disk partially filled with dyed crystals of table salt.
As the dispersion of clay, additives and water progresses, the mix becomes more resistant to compression and shearing, and the mixing
device must compensate for that change.
Besides the importance of selecting materials of construction that minimize mechanical wear and optimize corrosive resistance, the effect of these materials on the stick/ slip phenomenon required for efficient mixing
and for a clean discharge from the batch mixer must also be considered (ref.
Also custom-designed two-roll mixing
mills and NMC98 batch-mixer computer-control system for precise automatic mixing
That time is characterized by the highest possible input of shear forces (which is desirable) and very high load on the mixing
equipment (which is not desirable).
It was also seen that the batch temperature remained almost constant during the complete mixing
cycle, irrespective of the type of rotors.
Today, all inner parts of the internal mixer, which are in direct contact with the compound, are temperature controlled, with the mixing
chambers and the door top having drilled passages in close proximity to the inner surface.
Depending on machine and process, mixing
is mechanical, static, or impingement.
In this context, the rubber mixing
process is of special importance due to its influence on quality and costs of the final products.
Electrically heated, agitated vacuum/ pressure tanks for batch heating, degassing, and mixing
in sizes from 2 to 75 gal.
New equipment at the K show will include several mixing
heads for flexible foams and RIM, mixing
/metering machines, a gas loading device for rigid integral-skin foaming, and a low-pressure potting unit for electrical components.