Apparatus for the production of calcium silicate-containing stone blanks useful in constructing building walls

US4456449A · kind A · utility

Assignee

• Sicowa Verfahrenstechnik Fur Baustoffe GmbH & Co., KG · DE

Inventors

• Peter Schubert · Kaarst, DE
• Hermann Pfeifer · Oberkochen, DE
• Volker Hermann · Schlangenbad, DE
• Reimund Keller · Hattingen, DE
• Eckhard Schulz · Wallenhorst, DE

Key dates

• Filing date: Dec 15, 1982
• Grant date: Jun 26, 1984
• Expiry date: Dec 15, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/60
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An apparatus for the production of calcium silicate based stone blanks including at least one mold into which a crude mixture is poured, the mixture comprising granulated silicate-containing material, lime, water, a cement and foam. The mold has a cover, a bottom and side plate, with one of the plates being movable to open and close the mold. The crude mixture is heated in the mold essentially uniformly to a temperature between 45.degree. C. and 90.degree. C. until achieving the desired blank-strength by strength-forming reactions of the cement in the crude mixture. The heater used for this purpose is a high frequency voltage heater using two parts of the mold as condensor plates connectable with a high frequency voltage source. The formed stone blanks are thereafter removed from the mold and transferred to a transport station.