Method for manufacturing boards made of hydraulic binder with tapered edges, production line and apparatus for manufacturing such boards

摘要

The manufacture of sheet materials such as plasterboard by passing a water-bound material (2) through a die (4) between two facing layers (1, 3) uses laths (6) delivered from a magazine and placed beneath the lower facing layer (1) to create lines of reduced thickness between adjacent sheets so that, when cut, they have tapered edges. The laths, having a thickness of 0.5 - 4 mm and a length equivalent at least to the width of the facing layer, are introduced before or during the plaster pouring phase, and the sheets are cut after widthdrawal of the lath once the plaster has set.