Reproducible quality of PU foam gaskets

With dynamicLine, DOPAG offers an automated gasketing solution

Strong adhesion, long durability and high reproducibility – with dynamicLine from DOPAG, PU gaskets can be produced automatically via the FIPFG (formed-in-place foam gaskets) process. PU gaskets are used in door modules and lighting in the automotive industry, in door seals and ventilation systems for switch cabinets, and in the filtration and packaging industry, for example.

The dynamic mixing system of dynamicLine processes polymeric reaction materials for the production of PU gaskets precisely and with consistently high quality. With the help of a linear robot, it can be applied directly into the groove or mould as well as onto flat surfaces. This produces a soft foam gasket that hardens at room temperature without the use of a tempering oven. To compensate for different production environments and to produce the foam gaskets in consistent quality, the mixing chamber along with the material containers and hoses can be tempered.

The control unit can store several metering and positioning programmes. This enables the parameters to be changed flexibly. For example, different components or material formulas can be selected, or different discharge capacities with various gasket widths or heights.

Benefits of PU gaskets compared to manually inserted seals
In comparison to manually inserted seals, PU gaskets can be automatically fixed in position and can stick without additional adhesive tape. Thanks to the controlled overlap programmed by DOPAG, the start and end point of the foam bead merge into one another, and there are no undesired coupling points and no open joints or notches.

The costs for the PU gasket are also considerably lower and the gasket itself is higher in quality. Short cycle times enable efficient, automated production. Compared to punched or cut gaskets, there is practically no waste. The system can be rinsed with water, with no need for solvent.

High flexibility: applications for bonding and potting
DynamicLine also offers solutions for the dynamic mixing and automated application of adhesives and potting compounds. The dynamic mixing head is suitable for a wide range of materials, from extremely liquid to highly thixotropic. The use of linear or industrial robots makes automation possible that meets the exact requirements of the application.

Dynamic Mixing System for Gasketing/FIPFG