Pin disc mill

The Alpine pin disc mill shown in Figure 2.11 is a form of pin mill and consists of two vertical steel plates with horizontal projections on their near faces. One disc may be stationary whilst the other disc is rotated at high speed sometimes, the two discs may be rotated in opposite directions. The material is gravity fed in through a hopper or air conveyed to the centre of the discs, and is thrown outwards by centrifugal action and broken against of the projections before it is discharged to the outer body of the mill and... 

Depending on the design of the impactor, these mills can be divided into subclasses such as pinned disc mills, baffle plate mills, beater mills, hammer mills or swing hammer mills. 

A blend of the above ingredients was charged onto a two-roll mill having one roll at about 85-95°C and the other roll at room temperature and milled for 20 minutes. The resulting composition is ground into a powder in a pin disc mill cooled to about -72°C. with dry ice. The powder is passed through a 140 mesh sieve to remove large particles. 

Pin-disc mill Breakup by impact against a plate traveling at 200 m/s, product diameter determined by feed flowrate and speed of the pins. Ideal for soft material. Impact mill Breakup by impact against a plate traveling at 50 to 110 m/s, product diameter determined by exit screen size. 

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Figure 2.11. Alpine pin mill with both discs and sets of pins rotating...

A pin mill consists of two parallel circular discs each carrying a set of projecting pins (Figure 12.11). One disc is fixed and the other rotates at high speed so that its... 

Pin miil A grinder equipped with pin breakers positioned on plates or discs. These may be two rotors operating in opposite directions or one stator plate with pins between circular rows on the rotor disc. Pin mills are widely used by the dry- and... 

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