AEC 1426-i Twin-Shear Granulator - Manual (Page 11)

1426-i Granulator Chapter 2: Functional Description 10 of 37
2-3 Typical Features and Components
Hopper
The hopper is a hinged, upright, tray-feed enclosure with sound dampening. It tilts
completely out of the way for unobstructed access to the cutting chamber. It is designed to
facilitate feeding of material to the rotary knives and to prevent chips thrown from the cutting
chamber from reaching the operator.
Cutting Chamber
The cutting chamber is a rectangular enclosure comprising the main frame, the bed knives,
the bed knife shields, a balanced rotor, and a screen.
The main frame of the cutting chamber carries the bed knives and the bed knife shields. Both
the bed knives and shield are adjustable, and the bed knives have reversible cutting edges for
extended life.
The internal surfaces of the solid steel cutting chamber are machined to an exceptionally
smooth finish for ease of clean-out. The scissor-type cutting action of the chevron rotary
knives gives optimum cutting efficiency with low power consumption.
The screen is mounted in a swing-down cradle, positioned just below the rotor and acts as a
separating barrier to the granulated material, retaining the material in the cutting chamber
until the particle size is such that it will pass through the screen holes.
The open-type, high-alloy steel rotor carries the rotary knives. High-strength alloy steel
screws are used for attachment of all knives.
Drive System
The drive system consists of a drip-proof 1800 RPM motor set on an adjustable sliding base
that is mounted below the granulator cutting chamber. The motor drives the rotor with banded
V-belts for insured RPM control. Safety guards shield the motor shaft pulley, V-belts and the
rotor shaft pulley for complete operator safety.
Discharge System
The granulated material that falls through the screen is collected by a discharge chute beneath
the cutting chamber and directed into a bin. The bin can be removed from the front or left
side of the granulator for emptying.
On models fitted with an airveying system (optional), the granulated material that has fallen
through the screen is collected in a transition piece located beneath the cutting chamber. The
transition piece is connected to a blower, which conveys the granulated material through
ducting to the cyclone separator. The cyclone separator allows the granulated material to drop
out of the air system into a container.
Base
The base is a tube-mounted, bin-type construction with tubes located for forklift pick-up.