The method includes the following steps: activating the vacuum source (10), injecting an amount of pulp into the internal mould chamber (3) through the mould opening (7), thereby forming a pulp preform on the internal mould surface (8), injecting a dewatering and heating fluid through the mould opening at gradually increasing pressure until a maximum pressure, thereby performing a dewatering and drying step whereby the pulp preform on the internal mould surface is dewatered and dried, deactivating the injection of dewatering and heating fluid, deactivating the vacuum source, and extracting the moulded pulp product. Further included is a step of initiating rotation of the mould (2) about the central axis (4) of the mould and increasing rotational speed gradually, main-taining a maximum rotational speed of the mould at least during a substantial part of the dewatering and drying step, decreasing rotational speed gradually until standstill of the mould.
|D21J 7/ 00 A I
|International Bureau of the World Intellectual Property Organization (WIPO)
|Published - 17 Sept 2020