DÜRR: Continuous Dosing System

Dürr is expanding its product line with the EcoMeter SP, a continuous dosing system designed for the seamless application of highly viscous media without interrupting material flow. The product is well-suited for large-volume applications that require substantial amounts of adhesives or sealants. A screw spindle pump drives the continuous dosing system, making it lighter and more compact, lower maintenance, and more cost-effective than previous alternatives.

Three screw spindles deliver uninterrupted and continuous material feed. An electric servo motor drives the middle spindle, initiating movement in the other two. The connected supply station holds the material. These spindles rotate in opposition to push the material into the endless dosing system’s applicator. In contrast, piston dosing systems rely on material pressure to fill the chamber before the piston’s action expels it. This repetitive piston movement interrupts the application process, potentially exceeding predefined cycle times. In addition, piston dosing systems’ maximum filling quantity limits their application range. Previously, users either purchased the biggest available model with a volume of 600 cubic centimeters or combined two smaller piston dosing systems with a volume of 150 or 300 cubic centimeters into a tandem dosing system to counter this disadvantage. According to Dürr, this tandem solution was the only option for continuous material flow using the proven piston dosing technology.