Installation for forming molded members of fibrous material

Claim 1

Installation for forming molded members of a fibrous material, such as asbestos cement or the like, comprising a liquid-pervious basic form adapted to have a layer of said fibrous material contained in a liquid suspension positioned against a surface thereof; a liquid-pervious pressing form adapted to be moved toward said material layer-covered surface of said basic form; means for providing a zone of reduced pressure on opposite side of said basic form so as to facilitate removal of said liquid from said material through said pervious basic and pressing forms and effect thickening of the fibrous material interposed between said forms; frame means encompassing the peripheral edges of said basic form, said frame means extending, in the direction of pressing, beyond said basic form edges, said frame means being axially slidable relative to said basic form so as to assume during the pressing together of said basic and pressing forms, a height depending beyond the edges of said basic form corresponding to the final thickness of the molded fibrous material formed between said basic and pressing forms, said reduced pressure zone comprising upstanding peripheral sidewalls extending from said basic form; an upper closure wall connected to said side walls; pressure medium conduit means in said closure wall communicating with said pressure zone; and outwardly projecting flange portions formed on at least part of the upper end of said frame means, said upper closure wall having depending wall portions juxtaposed over said flange portions so as to form guideway means therebetween, and inwardly extending projections on said depending wall portions below said outwardly projecting flange portions.