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CATEGORIES

Gear Metering Systems

Gear pumps are the core of any gear system. They are based on the Archimedes' principle and differ from any of the delivery and metering systems mentioned below by the fact that they do not require any control elements. This means that no automatic or controlled valves are required - neither for the delivery process itself nor for determining the delivery direction.

The gear pumps used in metering and mixing systems are mainly based on two externally toothed gears of equal size (in case of very small types also internally toothed versions). The gears are located in a housing which features very little clearance between its walls and the gear.

PRODUCTS

  • Coredis
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    Coredis is used for the processing of especially light lowdensity 1K epoxies filled with micro hollow spheres. The special challenge in this case is that we are dealing with a reactive medium which remains in the material contacting systems after processing and could be subjected to a curing reaction. In order to prevent this, coredis features a specially developed structure. The material is supplied directly from the delivery container and the metering is carried out by means of a gear pump mounted on a heated follower plate. The material is guided through the connected heater hose to the dispending nozzle which continuously fills the core filler into the honeycombs.

    In case of production interruptions, all material contacting parts including the container can be dismounted in a few minutes and stored in a cold storage. Thus, no cleaning is required. If the production is restarted, the application can be resumed due to the heated components. This unique structure allows for the first time the continuous as well as precise metering of 1K core fillers and has the advantage that, after a simple expansion of the system, various materials can be processed on the same system.

    DOPAG systems in action
    In cooperation with coredis, DOPAG has developed a product for the processing of paste-like core fillers. This metering system is the result of intense cooperations with aircraft manufacturers, their suppliers as well as material producers. As the market leader in metering and mixing technology in the aerospace industry, DOPAG succeeded in developing a metering system that ensures the highest degree of reproducible quality and employee safety. For the first time, the integration into automation solutions allows for a fully automated mass production of honeycomb sandwich panels for aircraft interior equipment.

      Properties and benefits

    Up to 30% lower material consumption compared to manual processing
    Very low hazard potential, since the employees are not subjected to vapors and have no material contact
    Specially adapted pump construction for maintaining the low material density
    Infinitely variable metering from 50ml/min to 300ml/min (depending on the outlet nozzle and dimensions of the honeycomb)
    Application-specific outlet nozzles available
    Frame with boom for hose attachment to provide a better component accessibility
    Heated metering unit
    Touch display to ensure an easy operation of the system
    Very easy and quick dismounting of material contacting parts which may be stored in the cold storage
    Very low cleaning effort due to deep-freeze storage
    Various materials can be processed by simply expanding the system
    Highly precise application due to automation

      Technical Specifications

    Flow rate 50 ml/min to 300ml/min (depending on the outlet nozzle and dimensions of the honeycomb)
    Temperature
    RT up to 50�C
    Working pressure
    50 bar
    Material supply Gear pump mounted on a follower plate
    Viscosity range Medium to high viscosity
    Material characteristics Pasty, with low density
    Maximum air inlet pressure 6 bar
    Dimensions (without boom) 1,100 x 1,000 x 2,400 mm
    Weight approx. 350 kg
  • Modis
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    Modis is a highly dynamic, speed-proportional metering system for controlling the flow rate of single component adhesive applications in the automotive industry, as well as in the automotive supply industry. Modis allows operators the opportunity to cover a wide range of flow rates with just four different construction sizes.

      Application areas

    White goods
    Electrical
    Aerospace
    Defence technology
    Medical technology
    Construction
    Automotive

      Technical Specifications

    modis modis 2K
    Pump size [cm�/U] 1,2/6/15 1,2/6/15
    Flow rate [cm�/min] 120/600/1500 12 up to 3000
    Weight [kg] 15/15/22 30 up to approx. 80
    Material supply P30/P80/P200 P30/P80/P200
    Material supply optional heated/oversized ram/tandem heated/oversized ram/tandem
    Working pressure/
    Maximum pressure [bar] 160/200 160/200
    Viscosity range medium to high viscosity, stable medium to high viscosity, stable
    Material characteristics Fillers up to MOHS hardness 6 Fillers up to MOHS hardness 6
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