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. This tandem solution was the only option for continuous material flow using the proven piston dosing technology.
Unlimited volume and shorter cycle times
In contrast, the EcoMeter SP offers unlimited capacity making it versatile. It is suitable for countless application processes in car manufacturing, including body-in-white construction, final assembly, and battery manufacturing. It offers additional benefits besides endless dosing. The absence of a reverse piston stroke reduces cycle times, increasing production capacity. Compared to a tandem solution using two-piston dosing systems, employing a single spindle reduces the dosing system’s overall weight by up to 20 percent and its required installation space. This makes the EcoMeter SP more agile and dynamic, and it can connect to smaller robot arms. Moreover, the EcoMeter SP’s maintenance is less complicated with just one seal for material feed. The dosing system also uses less energy and is up to 40 percent cheaper than the comparable tandem version with piston dosing technology.
Versatile for large quantities of material
Dürr is offering the EcoMeter SP not as a replacement but as a complementary addition to the proven EcoShotMeter models with piston drive, which are ideal for applications that require high pressure, high volumetric flows, and utmost precision. The EcoMeter SP, on the other hand, is superior in its ability to adjust the pressure and volumetric flow rate thanks to its versatility and variability. The spindle speed meters the volumetric flow rate with extreme precision and can adapt to specific requirements. Therefore, the EcoMeter SP is suited for applications requiring consistent output pressure and continuous material flow, such as bonding and sealing panoramic glass roofs in final assembly or applying sealant for battery boxes and modules, which require significant quantities.
Dürr’s EcoMeter SP is available immediately in two versions: one for direct applicator mounting on the dosing unit and one for mounting the applicator using a hose so it is decoupled from the dosing unit. The endless dosing system is also suitable for large-volume industrial bonding applications using both 1C and 2C materials.
