METHOD FOR MAKING RETICULATED TUBULAR NET

摘要

A tube is extruded through a die and then partially severed on each side as the extruded item is moved away from the die. The cuts made on one side may be vertically spaced from the cuts made on the other side of the tube or sheet. The partially severed product is then unfolded to produce a thinner tube than that originally extruded. To produce a net structure, the die extrusion orifice is partially obstructed at a plurality of points to extrude a tube having continuous axial openings or bores contained within its wall. The tube may then be cut and unfolded to form a net structure having openings therein which correspond to the shape of the obstruction placed in the orifice or depending upon the way in which the cutting is carried out a double wall met may be produced.