Print Email Facebook Twitter Pressing process improvements for roofing tiles using porous moulds Title Pressing process improvements for roofing tiles using porous moulds Author Dortmans, L.J.M.G. Bos, B. Fischer, H.R. TNO Industrie en Techniek Publication year 2010 Abstract Roofing tiles are traditionally produced via pressing using plaster of Paris moulds. A replacement of such moulds by porous PMMA based moulds increases production speed and the durability of the moulds, however results in a non-acceptable surface finish due to enhanced adhesion of the clay to the porous mould. A much better release of the clay tiles after pressing could be obtained by applying a thin layer of a gypsum suspension of the mould starting the production cycle. The Ca2+ions caused a surface agglomeration of the clay particles leading to a suppression of adhesion on the porous mould and an improvement of the dewatering and consequently to a better release. Subject Mechatronics, Mechanics & MaterialsMIP - Materials for Integrated ProductsTS - Technical SciencesMaterialsIndustrial Innovation To reference this document use: http://resolver.tudelft.nl/uuid:40a7c64c-02b8-49cc-8e7d-f3415eac66b2 TNO identifier 408474 ISSN 0173-9913 Source CFI Ceramic Forum International, 87 (6-7) Document type article Files To receive the publication files, please send an e-mail request to TNO Library.