Precision Spray Control Allows Manufacturer to
Improve Product Quality
Problem: A building materials
manufacturer needed to prevent small particles of
fiberglass from becoming airborne and causing irritation
to the installer of the fiberglass mat. To achieve this
goal, they needed to spray varying amounts of a
proprietary product on the top and bottom of batt
insulation, which varied in thickness. This process
modification was due to their customers complaining
about end-product quality.
 Solution:
AutoJet
Technologies engineers designed a control system to
provide precise spray control for two banks of spray
guns each comprised of five Spraying Systems Co. 10535
automatic air atomizing spray guns. Both banks of spray
guns continuously apply the proprietary coating to the
top and bottom of fiberglass batt insulation. The
control panel allows for various flow rates based on
varying production rates.
The Model
2250 AutoJet Spray Controller, powered by SprayLogic™
software, uses a turbine flowmeter in a closed loop flow
system to control the flow rate for each bank of guns.
Production line speed is represented by a remote analog
input signal to the controller. As the line speed varies
from a specified maximum value, the flow rate to each
bank of spray guns is adjusted accordingly to maintain a
consistent application rate. The controller's PID
control feature allows the manufacturer to spray the top
and bottom of the insulation at one time, eliminating
the need for multiple controls.
The 10535 air atomizing spray guns are
equipped with clean-out needles to keep the system
operating at peak efficiency. Automatic gun clean-out
cycles are programmed via an external timer. This
feature eliminates downtime caused by clogged spray
nozzles and also minimizes time spent manually cleaning
the spray guns.
The spray system supplied by AutoJet
Technologies improved the company's product quality by
eliminating the loose fiberglass particles. The company
has also maximized their production rates while
minimizing overspray, which is key to sustaining
profitability. System installation was supervised by
AutoJet Technologies Engineering, which also provided
one day on-site training for production personnel.
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