Mass producing machines with general process controls
have given way to performance machines designed to adjust
conveying, cooling and curing characteristics on the fly for
individual parts as they are processed. Real time
identification and tracking process adjustments can be used
to immediately identify and minimize rejects without
sacrificing throughput. One example of this is the following
case study involving Preheating, Varnishing and Curing
resin on DC motor armatures. Design features
implementing the ideas listed above, as well as a
comparison of this machine to other similar methods. will
be provided in the paper.
A. Case Study Goals The goals for the project are shown in Table I Table I. Project Goals
Design the machine for processing with a quick cure polyester resin
The resin was to have low v.0.C.’~ (Volatile Organic Compounds) and emissions.
The resin was to cure at a lower temperature
The cure time was to be shorter
The production rate was set at 60 pieces per hour
The machine footprint was to be as small as
possible.
The DC Armatures included the following sizes. See
Table I1 and Figure I.
Table 11. Part Size Range
3. in (75 mm) to 5” in (I27 nun) diameters
0
2. in (50mm) to 9” in (225mm) stack lengths
b
5 pound (2.3 kg) to 35 pound (15.9 kg) parts
Figure I : Part Size Range
0-941783-23-5/03/$17.00 Q2003 EEE