US 11,661,377 B2 · System and method for manufacturing reinforcing elements for reinforced concrete

Abstract

A system (15) for manufacturing a reinforcing element (1) for reinforced concrete comprises a feeder (16) of a reinforcing fiber bundle (2) along a pultrusion path (4), an impregnating device (17) which impregnates the reinforcing fiber bundle (2) with a liquid thermoplastic polymeric resin (6) to obtain an impregnated fiber bundle (2), a forming channel (8) through which the impregnated fiber bundle (2) is conducted, a solidification device (19) of the composite thread (9) forming a solidified thermoplastic fiber-reinforced bar (11), a pulling device (20) which holds the reinforcing fiber bundle (2) taut along the pultrusion path (4), a winder (21) which winds the solidified bar (11) to form a coil (14), a provisional bending device (22) which bends the composite thread (9) not yet solidified or heats the solidified bar (11) to soften it, bends the heated bar (11) and then cools the bar (11) to solidify it again, so as to confer a continuous provisional curvature to the solidified bar (11) in the direction of the subsequent winding in the coil (14).

Claims34

Dependent claims

A system for manufacturing a bar-shaped reinforcing element for reinforced concrete with at least one bend, starting from a solidified thermoplastic fiber-reinforced bar, said system comprising a definitive shaping assembly having:

a supporting and feeding device which supports the bar and feeds the bar along an advancement direction along a shaping route;
at least one shaping device, arranged in a shaping position along a shaping path, and which locally heats the bar to soften it, bends the locally heated bar to make a definitive local bend and then cools the bar at the definitive local bend to solidify it again, wherein the shaping device comprises a twisting means which apply a twisting on the bar so as to twist the bar at the definitive bend;
and
optionally, a cutting device, arranged in a cutting position along the shaping path, which cuts the bar to obtain a single reinforcing element;
wherein said supporting and feeding device comprises at least one of:
A) an unwinding device, which supports said bar wound in a coil and unwinds the bar from the coil and feeds in an advancement direction along a shaping route;
or
B) a supporting and feeding device of said bar not wound in a coil.

5 more elements

A method for manufacturing a bar-shaped reinforcing element for reinforced concrete with at least one bend, starting from a solidified thermoplastic fiber-reinforced bar wound in a coil, comprising:

unwinding the bar from the coil and conveying the unwound bar in an advancement direction along a shaping path;
in a shaping position along the shaping path, locally heating the bar to soften it, bending the locally heated bar to make a definitive local bend;
applying a twist to the bar at the definitive local bend;
cooling the bar at the definitive local bend to solidify it;
and
in a cutting position along the shaping route, cutting the unwound bar to obtain a single reinforcing element.

3 more elements

Dependencies are inferred from the claim text.

System and method for manufacturing reinforcing elements for reinforced concrete

Life of this patent

System and method for manufacturing reinforcing elements for reinforced concrete

Life of this patent

Abstract

Claims34