B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/45
B28B 23/04 (2006.01) B28B 23/16 (2006.01)
Patent
CA 1258567
ABSTRACT OF THE DISCLOSURE A method and a casting bed are disclosed for producing a concrete product, especially an endless concrete blank prestressed in at least two directions. In order to enable a prestressing wire to be arranged in position and tightened in a simpler manner, at least one prestressing wire is passed in a zigzag-like manner crosswise between at least two fixed sides of a casting bed to form a wire net and the wire net is tightened from a third side of the casting bed in the direction of both first-mentioned sides so that the wire net is stretched in two directions by means of traction in one direction. Thereafter, concrete is fed onto the bed to form a prestressed concrete blank. An apparatus intended for carrying out the method comprises a weaving device for stretching the prestressing wires continuously and in a zigzag-like manner crosswise between two parallel sides of the casting bed and for tightening the wires in the longitudinal direction of the casting bed.
478132
G. Ronald Bell & Associates
Oy Partek Ab
LandOfFree
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