Device for producing a prefabricated cast concrete element

Abstract

A device for producing a prefabricated cast concrete element. The device includes a plurality of central structural elements, each of the plural central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the wire lattice mats. Shuttering walls are arranged on opposing sides of the plural central structural elements, each of the shuttering walls comprising a plurality of sections connectable to one another. A plurality of spacing members composed of rustproof materials are arranged and dimensioned for defining a spacing between each of the plural structural elements and the shuttering walls for receiving concrete for forming concrete shells.

1 . A device for producing a prefabricated cast concrete element, comprising: 
 a plurality of central structural elements, each of the plurality of central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the wire lattice mats;    shuttering walls arranged on opposing sides of said plurality of central structural elements, each of said shuttering walls comprising a plurality of sections connectable to one another; and    a plurality of spacing members composed of rustproof materials arranged and dimensioned for defining a spacing between each of said plurality of structural elements and said shuttering walls for receiving concrete for forming concrete shells,    wherein said spacing members comprise elongated spacing elements which are arranged and dimensioned to be pulled out from the spaces between structural elements and the shuttering walls during casting of the concrete shells.    
   
   
       2 . The device of  claim 2 , wherein said spacing elements are tubular.  
   
   
       3 . A device for producing a prefabricated cast concrete element, comprising: 
 a plurality of central structural elements, each of the plurality of central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the wire lattice mats;    shuttering walls arranged on opposing sides of said plurality of central structural elements, each of said shuttering walls comprising a plurality of sections connectable to one another; and    a plurality of spacing members composed of rustproof materials arranged and dimensioned for defining a spacing between each of said plurality of structural elements and said shuttering walls for receiving concrete for forming concrete shells,    wherein the wire lattice mats comprise longitudinal and transverse wires and said spacing members comprise strip-shaped spacing plates, each having an elbow and a plurality of slits running crosswise relative to a longitudinal extension of said spacing plates and fixing wedges, said spacing plates being inserted between said sections of said shuttering walls and pushed through the insulating members of said central structural elements, wherein each of said spacing plates being braced by said elbow against said longitudinal wires of said inner wire lattice mat and shuttering walls fixed in place by said fixing wedges received in said slits in said spacing plates.    
   
   
       4 . Device according to  claim 3 , wherein parts of said metal spacing plates project out from the prefabricated element after removal of the shuttering walls, said parts being one of removable by cutting and bendable over.