Sterlco TG 1200 Series Thermoform Granulators - Manual (Page 10)

T-Series Thermoforming Granulators Functional Description 10 of 37
2-3 Typical Features and Components
Hopper
The V-shaped in-feed chute is an upright enclosure that is bolted to the top of the granulator
and is easily removed for unobstructed access to cutting chamber or the feed rolls where
applications require a feed roll assembly. It is designed to direct continuous reclamation of
skeletal web directly from the thermoform trim process.
Cutting Chamber
The cutting chamber is a rectangular enclosure comprising the main frame, with an access
panel that lifts off to fully expose the upstroke bed knives, a balanced rotor with split offset
rotor knives and removable screen. The covers on the opposite side can easily be removed to
expose the downstroke bed knife shields and knives.
Both the bed knives and bed knife shields 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 angled rotor knives
gives optimum cutting efficiency with lower power consumption.
The screens are mounted in a swing-down cradle, positioned just below the rotor and act as a
classifier for 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 high-alloy steel rotor carries the rotor knives. High strength alloy steel screws are used
for attachment of all knives to the rotor.
Drive System
The drive system consists of a TEFC 1200 RPM motor set on an adjustable sliding base that
is mounted at the left end of the granulator. The motor drives the rotor directly and the feed
rolls are driven through a gearbox for assured RPM control. A belt guard shields the motor
drive sheave, feed roll reductor, rotor sheave and belts. Another guard at the opposite end
shields the feed roll sprockets and other mechanisms for complete safety.
Discharge System
The granulated material that falls through the screen is collected in a transitional section
located at the bottom of the granulator and directed through the base area to the right side of
the granulator for discharge with an airveyor system.
The transition section is connected to a blower (airveyor system), which conveys the
granulated material (through ducting) to the cyclone separator. The cyclone separator allows
the granulated material to drop out of the air stream into a bin or container.
Base
The base is caster-mounted, with four swivel (two locking) casters for easy positioning.