Chemicals mix for acoustics
7 Nov 2000
Inverters are optimising precise chemical mixing at Reiter Automotive, the major supplier of sound insulation panels to the car industry.
Acoustic panels are produced by the mixture of isocyanate and polyol even though the two chemicals have very different viscosities. Originally, the chemicals were delivered to the mixer to produce the foam by two positive displacement piston pumps, both driven from a single fixed speed motor.
However, this method did not accurately control the quantities of chemicals delivered to the mixing vessel. The power used by the single pump drive also produced excess heat surrounding the mixing process.
By individually controlling the speed of each of the chemical delivery pumps the mixing process was improved. FKI Industrial Drives supplied a package of two 15kW FID 3000 flux vector inverters with two Marelli 4 pole squirrel cage induction motors which provide greater control of the mixing process and increased reliability with downtimes to near zero.
