compomix DI: dispensing system for composites processing

Perfect dispensing of epoxy and polyurethane

DOPAG developed the compomix DI specifically for use in infusion processes in the production of rotor blades for wind power generators. The metering and mixing system can be used for direct infusion process and with vacuum bag infu- sion process with Infusion-Stations located up to 70 m from the machine with a deviation of less than ± 1 % of the mixing ratio. Depending on the system configuration, magnetically-coupled, leakage-free pumps that are hermetically sealed at the drive end are used to feed hygroscopic hardeners. The metering system range for the processing of unfilled infusion resins combines highly accurate metering pumps with extremely fast control technology. Metering is carried out from a regulated by-pass so that the normal initial process of filling the mixing tube is avoided and the long distance between metering and mixing point does not impact the mixing ratio. In addition, the output rate can be changed during the meter- ing process at pre-defined levels – without exceeding the permitted tolerance limits of the metering ratio.

Up to 6 Infusion-Stations can be added, working sequentially with individual programs according to infusion point re- quirement. The Infusion-Stations come with customer developed electronic valve module for pressure regulation of A and B, mixing station and scale module suitable to place vacuum bags. Each Infusion-Station can be configured individ- ually in terms of intelligent adapted filling rate and shot size according to actual infusions process status.


  • 2K system
  • Output rate 30 l/min and 60 l/min
  • Automatic ratio check with weighing scales
  • Control cabinet mounted onto a completely enclosed, mobile chassis
  • Metering pumps with overpressure protection
  • Metering pump of the B-component with magnetic coupling
  • Three-phase asynchronous motor
  • Control and regulation of mixing ratio by use ofhigh resolution volume counters
  • Multiple dosing line, suitable for up-to 6 Infusion-Stations
  • Feeding directly from IBC‘ ́s or loccal ring feeding line
  • Emergency backup of control parameters in case of a  power failure

Standard Infusion-Station

  • 2K system
  • Control cabinet
  • Electronically controlled valve modules
  • Mixing head
  • Scale module with suitable infubags
  • Distance to basic metering machine up to 70 m


  • Remote monitoring and analytics with production reports
  • Remote diagnostics
  • Cabinet cooling

Technical Specifications

Technical Specifications
  1. Flow rate*

    5 - 60 l/min (approx. 6 – 70 kg/min)

  2. Mixing ratio

    100:15 – 100:80, volumetric as per typical infusion resins

  3. Material supply

    Circular pipeline, original container, pressure vessels

  4. Viscosity range

    10 mPas – 5.000 mPas

  5. Material characteristics


  6. Power supply

    3 × 400 V / 50 Hz

  7. Max. air inlet pressure

    6 bar

  8. Dimensions L × W × H

    1350 × 1850 × 2100 mm (compomix)

  9. Weight

    approx. 1500 kg

  10. *

    * Depending on mixing ratio and viscosity


Mobile mixing station for infusion points

The Infusion-Station is the newly developed mixing station that can be placed at each infusion point along the rotor blade. These stations can be located up to 70 m distance from compomix DI with connection possible in both serial and parallel combination. With remote controls at each point, the Infusion-Stations fill up nylon bags that feed the mixed resin material to the blade. The intelligence at the Infusion-Station ensures that the material consumption at each point is limited to the requirement from the blade using a load cell.

  • Control panel with production relevant operations at each station
  • Specially customized electronic proportional valves for a quick switching time and highest accuracy
  • Up to 6 stations per compomix DI can be added as per customer requirement depending on the flowrate requirement at the infusion points
  • Static mixing system for easy maintenance
  • Adjustable height of the station to ensure optimal flow to the infusion point
  • Intelligent control unit linked to the integrated load cell
Technical Specifications  
Power supply 230 V
Air supply 6 bar
Dimensions L × W × H 1.000 × 800 × 2.000 mm
Weight approx. 200 kg