公开(公告)号：US3608003A

公开(公告)日：1971-09-21

申请号：US3608003D

申请日：1966-11-21

申请人： INSEC INSTITUTION EUROPIENNEDE

发明人： KLAUE HERMANN ,  METZGER EMIL

IPC分类号： B28B1/093 ,  B28B1/52 ,  B28B13/02 ,  B28B13/04 ,  B28B15/00 ,  B28B19/00 ,  B28B23/00 ,  B29C67/24 ,  E04C2/26 ,  B28B1/08

CPC分类号： B28B19/0092 ,  B28B1/093 ,  B28B1/52 ,  B28B13/02 ,  B28B13/04 ,  B28B15/00 ,  B28B19/00 ,  B28B23/0081 ,  B28B23/0087 ,  B29C67/245 ,  E04C2/26

摘要： In a method and apparatus for producing lightweight constructional plates by casting a mixture of filling materials and a binder into a mold, a cement and water are continuously centrifuged to form a liquid cement binder, and the binder and filling materials are continuously fed to a slowly rotating drum mixer to form the mixture. The mixture is continuously supplied to a mold while the mold is moved at a speed coordinated with a rate of mixture supply thereto to fill the mold progressively to a uniform height, while progressively subjecting only the mixture in the mold to vibration and to leveling to a uniform height. The mixture is supplied to the mold at a rate so coordinated with the rate of mold movement that the hardening reaction of the liquid cement binder just begins when the mixture is subjected to such vibration. As each mold is filled and the mixture therein vibrated, the mold is transported to a curing area and, when the cast mixture has hardened and cured, it is removed from the mold and the mold is returned for refilling. A glass fiber mat, soaked in a liquid cement, is applied to at least the under surface of the cast mixture while the mixture is being cast and before the liquid cement coating of the glass fiber mat has completely solidified. The liquid cement applied to each glass fiber mat preferably has an addition of 20 to 30 percent of natural or synthetic rubber. Each plate may have imbedded therein one or more reinforcing grids, and these reinforcing grids, as well as the glass fiber mat or mats are supplied to the mixture in the mold in a continuous manner while each mold is being filled and its mixture vibrated.