Blender, planetary

Planetary Blenders Aaron Aeschbach AMF GEI-Collette (GEI International) Hobart Jaygo Littleford Day Ross Vrieco... 

Screwipaddle blenders Ribbon blenders Orbiting screw blenders Planetary blenders... 

FIGURE 31 Ross 2-gallon sanitary double planetary blender. Source Courtesy of Charles Ross Sons Company. 

Convection blenders reorient groups of particles in relation to one another as the result of mechanical movement, for example, caused by a paddle or a plow. As a result, circulation patterns result in this type of blenders. Subclasses of convection blenders are typically defined by vessel shape and impeller geometry. Ribbon blenders (Fig. 30), planetary blenders (Figs. 31 and 32), orbiting screw blenders (Fig. 33) are examples of convection blenders. High shear mixers comprise another sub-class of convection blenders that will be discussed separately. 

Figure 18.7 Planetary blender with water-heated jacket.

Low-Shear Granulators. These are the traditional granulators and are of the planetary type (e.g., Hobart, Collette) or the kneading type (Z-blade mixers). Another type of these low-shear granulators consists of a V-blender with an intensifier bar (e.g., Patterson-Kelley). 

FIG. 21-157 Examples of low-shear mixers used in granulation, (a) Ribbon blender (h) planetary mixer (c) orbiting screw mixer (d) sigma blender (e) double-cone blender with baffles (/) v blender with breaker bar. (See also Solids Mixing. ) [( ) and (d), Chirkot and Propst, in Parikh (ed.). Handbook of Pharmaceutical Granulation Technology, Taylor 6- Francis, 2005.]... 

Sometimes, small scale equipment is available in a modular design. For example, to the all-purpose drive stand, shown in Fig. 11.12, a multitude of attachments can be fitted that allow the testing of most tumble/growth agglomeration methods in the laboratory. Fig. 11.13 depicts the most important work modules they are a disc or pan agglomerator (a), a coating pan (b), a bowl blender (c), a planetary bowl blender... 

Fig. 11.13 Photograph of different tumble/growth agglomeration work modules that are attached to the all purpose drive stand of Fig. 11.12. (a) disc or pan agglomerator (b) coating pan (c) bowl blender (d) planetary bowl blender (e) double cone blender (f) cube mixer (g) high shear mixer (h) pug mill/kneader (courtesy Erweka, Heusenstamm, Germany).

Liquid Mixer Ribbon Blenders Littleford Mixers Planetary Mixers High Speed Agitation Mixers Can be controlled to yield very fine grinds/mixes, controlled aeration, controlled heat buildup choice depends on mix viscosity, batch size, compounding ingredients (easy vs. hard to disperse). 

The mixing for W/O emulsions is usually performed in the laboratory by simple equipment like a magnetic stirrer, an ordinary mechanical stirrer with multiple fins, a planetary stirrer, a high shear / high speed blender, an ultrasonic vibrator or in some cases a sonic disruptor [18]. Ordinary rotational mixing can be coupled with sonication for obtaining relatively small droplets [42]. 

This section discusses subsequently the Stephan mixer, the rotor-stator mixer, the planetary mixer, the mortar with pestle, the beaker mixer/blender, the three roll mill, the coffee grinder, the Topitec mixer and Unguator mixers. 

Low-shear granulators—twin shell (Peterson Kelly, PK) with an agitator bar, dough mixer or planetary mixer, ribbon blenders, and fluid bed granulator without the rotogranulator... 

The machine classes to be considered under mechanical agitator granulators are (1) ribbon or paddle blender (2) planetary mixers (3) orbiting screw mixers and (4) sigma blade mixers. 

The Redpath Museum has a few meteorites, although you can easily miss them. They re just tiny black rocks, some speckled, a few of bulbous metal, but none is very colorful. Geology was a lot simpler 5 billion years ago. In his paper describing mineral evolution, Hazen says the earliest meteorites have only 60 different minerals, about 20 of these in grains too small to see. The planetary disk and intense solar radiation worked like a blender on high speed, smoothly mixing the elements into hard, dark chunks of rock, rich in Hazen s Big Six elements. The other 77 elements were occasional impurities smoothly dispersed throughout. 

---