Patent ID: 6959747

Claim:
Machine for applying a fiberglass reinforcement to disposable formworks for columns, particularly for formworks provided with a tubular body, preferably made of expanded polystyrene, having a sealing inner coating and an external coating or reinforcement made of a band of fiberglass mesh rolled up helicoidally on said tubular body, characterized in that it includes, on an elongated bench ( 1 ), which dimensions are according to the dimensions of the formwork ( 3 ), a pair of longitudinal rollers ( 2 ) constituting a seat for said formwork ( 3 ) and being conveniently motorized in order to confer a rotational movement to the formwork ( 3 ) with the assistance of upper pressure rollers ( 12 ), having also a carriage ( 14 ) on said bench ( 1 ), movable in parallel to the rollers ( 2 - 12 ), wearing the fiberglass mesh delivering reel ( 13 ), with the special particularity that said reel ( 13 ) is mounted on the carriage ( 14 ) having the possibility to rotate around a vertical axis ( 18 ) in order to vary the angle of the continuous band of fiberglass mesh with respect to the axis of the formwork ( 3 ), enabling the helicoidal rolling up in both directions as well as the rolling up perpendicular to the formwork ( 3 ), particularly at the ends of the same, the reinforcement delivering reel ( 13 ) being furthermore assisted by an automatic brake against which the traction rollers ( 2 ) are acting, in order to confer the appropriate tension to the fiberglass mess during its rolling up on the formwork ( 3 ), further characterized in that a portal frame is established on the bench ( 1 ), made of a pair of fixed poles ( 5 ) on which a bridge structure ( 6 ) is placed, vertically movable along guides ( 7 ) by means of a motor ( 8 ), said bridge structure ( 6 ) having a plurality of lower arms ( 10 ) projecting frontally, articulated and actuated by their respective pneumatical cylinders ( 11 ), having arms ( 10 ) supporting at their free ends said pressure rollers ( 12 ), by which they acquire an adjustable height in order to adapt to formworks ( 3 ) having different diameters, and exerting a pressure on the latter thanks to the strain provided by the cylinders.