EP 0390302 B1 19950322 - Process and device for making plaster elements especially imitation marble with visible faces of high surface quality.
Title (en)
Process and device for making plaster elements especially imitation marble with visible faces of high surface quality.
Title (de)
Verfahren und Vorrichtung zur Herstellung von insbesondere marmorähnlichen Gipselementen mit Sichtflächen hoher Oberflächengüte.
Title (fr)
Procédé et dispositif de fabrication en particulier d'éléments en plâtre imitant le marbre avec bon état de surface sur les faces apparentes.
Publication
Application
Priority
DD 32707089 A 19890330
Abstract (en)
[origin: EP0390302A2] The invention relates to the production of plaster elements having decorative visible faces of high surface quality, widely used in the construction industry. The plaster elements can be made in various configurations, in a single colour or marbled. This is achieved according to the invention by a method in which a multi-layer moulding material consisting of a water/plaster mixture and dried plaster powder is covered in a mould with a hygroscopic and/or open-cell material of low compressibility and then water-compacted by pressure elements with simultaneous removal of air and subsequently compressed with the exclusion of air. A positive pressure is built up in the moulding material and the material covering it and this is maintained at least in part until dimensional stability of the plaster element has been attained. The plaster element is then released with the aid of the pressure elements. The device according to the invention is distinguished by the fact that an upper part is designed as a holder with pressure elements articulated on it on the top and bottom. The lower part for holding the moulding material comprises a dimensionally stable frame with an integrated separating frame and is supported in airtight fashion on the mould bottom. The upper part and lower part can be locked together airtightly via a seal. <IMAGE>
IPC 1-7
IPC 8 full level
B28B 3/02 (2006.01); B28B 7/44 (2006.01); B30B 1/00 (2006.01)
CPC (source: EP)
B28B 3/021 (2013.01); B28B 7/44 (2013.01); B30B 1/003 (2013.01)
Designated contracting state (EPC)
AT BE DE DK FR IT NL
DOCDB simple family (publication)
EP 0390302 A2 19901003; EP 0390302 A3 19910904; EP 0390302 B1 19950322; AT E120122 T1 19950415; CA 2013151 A1 19900930; DD 300966 A7 19920917; DE 59008740 D1 19950427; HU 901850 D0 19900828
DOCDB simple family (application)
EP 90250084 A 19900330; AT 90250084 T 19900330; CA 2013151 A 19900329; DD 32707089 A 19890330; DE 59008740 T 19900330; HU 185090 A 19900327