How to get the correct dosing of cooling lubricants

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The operating principle of the Dosatron proportional dosing pump

The Dosatron proportional dosing pump works with a volumetric hydraulic motor that provides continual injection of the liquid or soluble concentrate. It uses water pressure to operate and only requires connection to the water supply. The concentrate for dosing is drawn in independently from the water supply and is mixed with the drive water. The dosing quantity always stays proportional to the water throughput, as per the manually adjusted dosing rate, even if there are flow or pressure fluctuations in the water supply system. Furthermore, the metering accuracy of the pump is not affected by piping lengths, which simplifies its installation.

The proportional dosing system combines the functions of a water meter, dosing pump and mixer into a single unit with a design that does not allow for any dosing errors. The dosing system is simple to operate and has low maintenance requirements. Its compact form gives flexible installation options including mounting as a single metering device directly on the tooling machine, as a metering device on a mobile metering carriage together with a concentrate container, or mounting at a central location as a filling station. It is available in a selection of housing materials with a choice of seal elastomers to suit the application needs. ATEX certification is also available for use in potentially explosive atmospheres as well as FDA certification for food safety applications.

In co-operation with Henkel, LDT Dosiertechnik has created a special solution that satisfies even the most stringent requirements. The use of the water-powered pump, which requires no electric supply or other utilities such as compressed air, offers customers further potential to reduce energy and installation costs.

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Martin Desinger says, “Thanks to the excellent co-operation with LDT, we have succeeded in developing a tailor-made ‘plug and play’ system, which meets all requirements of our customers and different packaging sizes. This is exactly the flexible and safe solution we were looking for.”

For the Bonderite Dual-Cys process, two proportional pumps are connected in series. Feed pumps are used to load lubricant into the tooling machine. The LDT Dosatron dosing pumps are then used to make up the coolant mixture and refill the recycled solution to maintain the desired concentration.

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