Maguire Concentrate FeedersHow they work:
The controller signal cord
is plugged into an outlet that is energized only when the
process machine screw runs. During each screw return cycle
(or continuous for extrusion), the motor runs and color is
metered into the throat of the process machine.
The digital counter located
on the face of the controller provides the means for predetermining
the exact degree of auger rotation and, therefore, the precise
amount of color that will be added. For injection molders,
the motor will shut off when the preset count is reached during
each cycle. For extruders, an optional digital tachometer
feedback is available to ensure that motor speed is precisely
regulated regardless of changing torque requirements or variations
in plant voltage.
To determine the proper
setting for the counter, a simple formula is used based on
percentage of color required, a predetermined metering rate,
and total shot weight in grams (or pounds per hour for extrusion
applications).
The controller contains
a 1/27 HP DC Permanent Magnet motor with variable speed control.
In the standard configuration, the motor is close coupled
to a heavy duty gearbox. As the motor turns, a "hall
effect" pickup device on the motor sends 3 pulses per
revolution to the microprocessor controlling it. The gearbox
ratio of 53:1 means that 159 pulses (3x53) are received for
every single revolution of the motor output shaft.
The thumbwheel switch
on the controller should be set to the exact number of pulses
that the motor is going to run before stopping. The microprocessor
in the controller automatically multiplies the setting by
a factor of 10. A setting of 16 on the controller will allow
the controller to receive 160 pulses or run approximately
1 revolution before stopping (regardless of motor speed).
MCF Series
Automatic Speed Control
Using digital input, the microprocessor
detects and automatically compensates for changing cycle times,
varying torque requirements, and/or fluctuations in plant
voltage. This eliminates the need for monitoring and adjustment.
As an option, the controller may be remotely positioned up
to 20 ft. from the processing machine.
Selection of Feed Rates
Auger sizes of 1/2" and 1"
are available with a selection of variable-speed motors ranging
to a maximum of 130 RPM. Your part weight or maximum extrusion
rate will determine the proper combination for your application.
Stable, Low Profile Adaptor Frame
The 10" square adaptor frame
with corner support angle iron provides a stable platform
for your existing natural material hopper, while only raising
it 3-1/2 inches. A wide range of bolt patterns can be accommodated.
An 8"x8" pattern is standard to match other items
manufactured by Maguire Products.
Removable Stainless Steel Hopper
The concentrate hopper rests securely
in a support channel without utilizing bolts or fasteners.
To change colors, the entire assembly (including hopper, auger
tube, and auger) is easily removed by the operator and carried
back to the color container. No pellets are left to contaminate
your next color, and not one pellet is spilled. All stainless
steel construction assures ease of cleanup. The 0.5 cu. ft.
hopper holds up to 30 pounds of concentrate and four sight
glasses provide a clear view of the color level. The lid is
fitted to allow the addition of our Model ML color loader.
Material Flow Baffle Chamber
Shown is the Maguire "material
flow baffle chamber" on Series MCF feeders. The stainless
steel sides are formed to produce a baffled flow of resin
such that the color pellets are dropped into and evenly distributed
throughout the flow of natural material. Acrylic panels provide
a clear view of the resin and color flow.
Pellet Shutoff
A simple but very effective slide
bar prevents pellets from spilling from the auger tube when
the hopper is removed for color changes. This bar slides forward
when the drive unit is engaged, allowing pellets to dispense
properly. During hopper removal, the bar slides back to cover
the open end of the auger tube.
Model |
Auger Size |
Max RPMs |
Continuous Output
lb/hr |
|
|
|
Min |
Max |
MCF-4-18 |
1/2" (12mm) |
30 |
.05 (0.02 kg) |
4 (1.8 kg) |
MCF-4-34 |
1/2" (12mm) |
55 |
.1 (0.05 kg) |
7 (3.2 kg) |
MCF-8-34 STD |
1" (25mm) |
55 |
.7 (0.32 kg) |
58 (26 kg) |
MCF-8-94 |
1" (25mm) |
130 |
1.6 (0.73 kg) |
135 (61 kg) |
MCF-16-50 |
2" (50mm) |
90 |
8.0 (3.6 kg) |
600 (272 kg) |
|
Maguire
Concentrate Feeders carry a 5 year factory warranty. Maguire
warrants this equipment to be free from defects in workmanship
under normal use and service. |
|