Hydraulic fluids in plastic injection molding processes

Abstract

The present invention relates to the use of hydraulic fluids in plastic injection molding processes. Thereby it was surprisingly found that the use of hydraulic fluids with the right combination of physical parameters like the viscosity grade, the viscosity index, the density and the dispersancy allows for significant energy savings in plastic injection molding processes (PIM). The PIM process is an industrial process to manufacture plastic parts at well controlled temperatures, pressures and cycle times. The energy consumption of the process became more important over the last years, however, other parameters like process stability and accuracy of plastic part parameters as well as machine protection and long oil drain intervals have to be satisfying.

Description

technical field [0001] The present invention relates to the use of hydraulic fluids in plastic injection molding processes. It has thus been unexpectedly found that the use of hydraulic fluids with the right combination of physical parameters such as viscosity grade, viscosity index, density and dispersibility allows significant energy savings in the plastic injection molding process (PIM). The PIM method is an industrial method of manufacturing plastic parts under well-controlled temperature, pressure and cycle time. Over the past few years, the energy consumption of the described method has become more important, however, other parameters such as process stability and precision of the plastic component parameters as well as mechanical protection and long oil change intervals must be satisfactory. Background technique [0002] Injection molding is a manufacturing method used to produce parts by injecting material into a mold under well-controlled temperature, pressure and ...

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Problems solved by technology

However, none of these concepts touches the hydraulic fluid used in this

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