Wollin presented newly developed mould spraying machine ESM

Die Casting
Manufacturing Processes
Wollin showed the newly developed ESM (Efficient Spray Machine) series in the sizes ESM2, ESM3 and ESM4 at the EUROGUSS 2020. It replaces the previous PSM2-4 mould spraying machine series.

Without the proven guide rails, most of the mechanical parts have been replaced. In particular, the integration of options such as flow measurement, pressure control and pressure booster have been integrated into the horizontal axis. This reduce the space required on the die casting machine and the weight on the vertical axis. The design has been reinforced and the stability of the axes has been improved by improving the useful length of the previous guides, resulting in a 25% increase in payload. The ESM is comparable to the previous PSM mould spraying machine in terms of space requirement and console position. Additionally, the Service accessibility has been significantly improved.

Thanks to the complete Industry 4.0 implementation, it is possible to integrate all functions and settings into the user interface of the die casting machines with the newly developed PC3 control. The PC3 already takes future safety requirements into account.

The trend turns is towards micro-spraying, though the supply line for the release agent concentrate has already been integrated into the machine, which considerably simplifies the extension of the Eco-Spray option and the use of dosing nozzles. The selection of release agents for conventional spraying or concentrate spraying is now possible without disassembling the spray tool. ¬

Microspraying with Wollin EcoSpray is becoming more and more important in the current climate debate. By eliminating wastewater, reducing release agent consumption and significantly reducing the energy required for compressed air and die temperature control, production conditions in die casting are becoming much more environment-friendly. By reducing the thermal shock caused by strong cooling with water, heat cracks can also be considerably reduced, and the die service life significantly increased (+50 to 300%). The component quality is also improved regarding porosity and surface quality.

The low additional costs for a little more complex mould temperature control and spray technology are very quickly amortized by the savings achieved.