22-05-2013, 02:43 PM
MIXING EQUIPMENTS
MIXING EQUIPMENTS.pptx (Size: 1.43 MB / Downloads: 37)
Change – Can Mixer
Beater Mixer
Consist of rotating blade which has planetary motion so as to reach all parts of the vessel
Disperser
Heavier in construction and draws more power than a kneader.
Mixes additives and coloring agents in stiff materials.
Banburry Mixer
Internal Mixer
Heavy Duty two Arm Mixer
30-40 rpm arm speed
Compound rubber and plastic solids
Muller Mixer
Smearing or rubbing action
Consist of a pan with central vertical shaft
wide heavy wheels attached to the shaft, which drive the wheels in circular path
plows guide the solid under the wheels
especially effective in uniform coating of particles with a small amount of liquid
Power Requirement
Large amounts of mechanical energy are needed to mix heavy plastic masses.
Only part of energy supplied is directly useful for mixing.
Mixers that work on small quantities of material, dividing it into very small elements, make more effective use of energy than those that work slowly on large quantities.
The shorter the mixing time required to bring the material to the desired degree of uniformity, the larger the useful fraction of energy supplied will be.
The energy supplied appears as heat, which must be removed to avoid damaging the machine or the material.
Ribbon Blender
Consist of a horizontal trough conataining a central shaft & a helical ribbon ribbon agitator attached to the shaft.
Mixing results from the ‘turbulence’ induced by counteracting action of the ribbon.
Effective for mixing of thin pastes & for powders that do not flow readily.