B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/122, 25/27
B28B 21/00 (2006.01) B28B 3/02 (2006.01) B28B 7/44 (2006.01) B30B 1/00 (2006.01)
Patent
CA 2013151
ABSTRACT Manufacturing plaster elements The invention relates to the manufacture of plaster elements with decorative high-quality surface finishes which are widely used in the building industry. The plaster elements can be made in one colour or marbled in various configurations. According to the invention this is achieved by a process where a multi-layered moulding mass, consisting of a water-plaster mixture and dry plaster powder, is covered in a mould with a hygroscopic and/or open-pore low-compressible material and is then pre- compacted by pressure elements with simultaneous air extraction and then compressed with simultaneous air exclusion. An excess pressure is built up in the moulding mass and the material covering same and this excess pressure is maintained at least partially until the plaster element reaches its stable shape. The plaster element is then removed from the mould by means of the pressure elements. The apparatus according to the invention is characterised in that an upper part is designed as the recess with pressure elements connected for articulated movement at the top and bottom ends. The lower part for holding the moulding mass comprises a stable shape frame with integrated partition frame and is supported in air- tight manner on the mould base . The upper and lower parts are lockable together in air-tight manner by means of a seal.
Ast Walter
Schmidt Michael
Ast Walter
Bauakademie Der Deutschen Demokratischen Republik
Ridout & Maybee Llp
Schmidt Michael
LandOfFree
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