Precision mixing and dispensing facilitates miniaturisation

As continuing trends to miniaturisation call for smaller, more precise and ever more repeatable metering, mixing and dispensing units for two-part materials, Intertronics has introduced the preeflow eco-duo330. The company claims that it sets new standards in micro-dosing for two component systems and can provide dosages as small as 0.2 to 32ml/min with repeatability. Target applications are medical device manufacturing, optics, photonics, electronics assembly, biochemistry and semi-conductors, where the ability to meter and mix small volumes will be appreciated.

Dosing quantities of 0.005ml (per shot) is achievable, irrespective of temperature, time, pressure and viscosity – dosed as a dot or bead – so the smallest quantities can be created as required. The microprocessor-controlled system creates a dosing accuracy of ±1 per cent and repeatability of over 99 per cent in a process that is reliable and reproducible, says the company. Dependant on application, the mixture ratio between the two input materials can be adjusted from 1:1 to 10:1 using the intelligent control via a graphical interface. Integrated pressure monitoring can continuously check the dosing of dots, as well as bead applications, for quality. The maximum continuous bead application is 6.6ml/min, whereas a variable bead thickness from 0.1 to approximately 2.0mm (directly proportional to the speed of the application) is now achievable, says the company.

The volumetric dispensing system has self-sealing rotor-stator arrangement whereby controlled rotary motion transfers the medium by positive displacement in the stator. The medium is subject to very low stress and therefore unchanged by this process. By switching to reverse-flow, the system ensures a clean and controlled stop of material or medium with no drips and no mess.


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