| 摘要 |
A method for the manufacture of expandable granulate is disclosed. The method includes impregnation of a plastic melt using a fluid expanding agent and granulation of the impregnated melt by means of a plant. The plant includes at least one pressure-producing feed apparatus, a metering apparatus, contacting and homogenising apparatus, at least one cooler, an underwater granulator and a plant control. The granulation is carried out using a liquid which is used in the underwater granulator as a cooling and transport medium for the granulate. A blowing action of the expanding agent is at least partly suppressed and regulation of the parameters to be set for the granulation is effected using the plant control. Measurements of the parameters are made and compared with desired values, and deviations are used by the plant control to influence a heat take-up from the impregnated melt by the at least one cooler. |
