Grinders
Brief Design Aspects
Horizontal Blade plastic grinders are the most common design available in the market. In a typical design there are 3 blades in rotor and 2 stationary blades. All blades require periodic sharpening. The stationary blades can be adjusted to maintain the close clearance with between the rotary and stationary blades. The models are available from 1 HP till 50 HP with typical application between 5-15 HP. The grinder chamber size goes on increasing as the HP increases. In 24" and bigger models usually set of 6" or 12" blades is used instead of one big 24" blade.
Application specific Accessories
Cutter arrangement
For cutting rolls, cans in half for feeding in the grinder
Material Handling Blower and Cyclone
For fine grinding applications and light material grinding application
Collection Trolley with liquid separation arrangement
In product destruction application like filled bottles, ampules for gravitational separation of liquid after crushing
Disadvantages of this common plastic grinder design
Throw back of the material
some material is thrown back from the hopper and some pushing is required so that fed in material can be grabbed in cutters
Low throughput in light material grinding
Due to uncontrolled air flow in the grinding chamber the light material keeps floating and it takes more time to get caught in blades for reduction
Large size blades
The special material blades used in grinders are heavy and difficult to handle, and adjust
Unused area of blades
only 1/3rd area of the blade is usable after resharpening as remaining area is required for blade tightening
High blade cost
Blades being consumable item of a grinder the cost implication of changing the whole blade set is high
