Method for the production of moulded parts from suspensions and a machine for carrying out the method

摘要

Moulded parts made predominantly from fibres have been produced up until now by immersing a moulding body connected to a vacuum device in a large-volume working vat. In so doing, a part-quantity of suspension is removed by means of vacuum which is applied for a specific time. By this means, the fibres are deposited on the forming mesh. Since the suspension is at rest, this is a static method. The filter cake which is formed on the forming mesh is so dense after a few seconds that high negative pressures are necessary for the manufacture of the moulded part. In contrast to the known static sheet-forming method, the invention relates to a dynamic sheet-forming method in which a predetermined quantity of suspension is set into turbulent oscillation and compressed while removing liquid by means of a pump working volumetrically, The invention likewise relates to a device for this. The advantages of the invention are, inter alia, lower operational and energy cost, lower investment cost and a multiplicity of technological advantages and the possibility of producing fully novel products, since the liquid also does not have to be water. The system may be completely closed.