The paddle rotates on its axis and the axis equally rotates around. Planetary mixer, also known as vertical mixer and commonly called beater consists of an anchor type of paddle/agitator revolving in a cylindrical pot with a hemispherical base. Requires large freed room for installation.Gentle blending action due to rotation of the screw on its axis.It is also used where the process parameters are critical.Orbital screw blender is used in mixing shear sensitive and heat-sensitive powders.Pharmaceutical uses of orbiting screw blender Orbiting screw blender unlike horizontal ribbon blender achieves almost 100 % material discharge. The blended powder is discharged through a discharge value located at the bottom of the blender. This modification makes V-blender broaden its application in the pharmaceutical industries and they include This modified v-blender is called V-Blender with intensifier bar or V-blender agitator. V-Blender with intensifier bar (V-Blender agitator)Ī V-blender can be modified by providing it with a high-speed intensifier bar also known as lump breaker running through trunnion into the vessel along with a spray pipe for liquid addition. It is not suitable for sticky materials.It is best suited for free-flowing and cohesive products.Ribbon blender can be designed to operate in both batch and continuous modes.The ribbon blender is a popular blender because of its versatility for blending solids combined with its ability to perform heating, cooling, coating, and other processes. The clearance between the outer edge of the ribbon edge if the ribbon flight and the inside wall of the blender container.Ī clearance of 3 to 6 is usually maintained depending on the application.The properties/nature of the material to be mixed.Practically, it is difficult to achieve 100 % discharge in a ribbon blended material remaining after discharge depends on The blended material is discharged from the discharge valve (which can be more than one in number depending on the size of the blender) located at the bottom of the trough. Mixing efficiency of a ribbon blender is affected by These movements (radial and counter-current axial movements) facilitate the formation of a homogenous mix of the material within 15-20 minutes of startup with 90 – 95 % or better homogeneity. Radial movement, on the other hand, is achieved as a result of the rational motion of the ribbons. Axial movement results from the difference in the peripheral speed of the outer and inner ribbons along the horizontal axis of the blender. The outer ribbon moves materials from the ends towards the center of the trough and the inner ribbon moves the material towards the outside of the trough (that is from the center to the ends) during blending operations. Ribbon blender also referred to as a double helical ribbon agitator consists of inner and outer ribbons.
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Of all the sub-classes, the ribbon blender is perhaps the most widely used.
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1.3.3 Disadvantages of orbiting screw blenders.1.3.2 Advantages of orbiting screw blenders.1.3.1 Pharmaceutical uses of orbiting screw blender.1.2 V-Blender with intensifier bar (V-Blender agitator).1.1.1 Pharmaceutical uses of Ribbon Blender.