Patent ID: 8915291

Claim:
Plant for forming grids for electric battery plates, which comprises: a crucible ( 104 ) containing molten lead ( 105 ); a grid forming machine ( 102 ) provided: with a support structure ( 2 ) set on the ground; with a rotary drum ( 4 ) rotatably mounted on said support structure ( 2 ) around a rotation axis (Y), around which it is actuated to rotate by drive means, said rotary drum ( 4 ) being provided with an external peripheral surface ( 7 ) with a plurality of grooves ( 8 , 9 ) obtained in accordance with a grid design to be attained; with a sliding block ( 11 ), mounted fixed on said support structure ( 2 ), slidably sealingly coupled with the external surface ( 7 ) of said rotary drum ( 4 ), and provided with means ( 16 ) for distributing molten lead ( 105 ), adapted to insert said molten lead ( 105 ) within the grooves ( 8 , 9 ) of said external peripheral surface ( 7 ), filling them during the rotation of said rotary drum ( 4 ); means for feeding molten lead ( 103 ) in order to feed said forming machine ( 102 ) in a continuous manner with a flow of molten lead ( 105 ) drawn from said crucible ( 104 ), comprising: a feed duct ( 108 ), which is connected to said crucible ( 104 ) of molten lead ( 105 ) and to an inlet of said distribution means ( 16 ); a return duct ( 109 ) connected to an outlet of said distribution means ( 16 ) and to said crucible ( 104 ); a pump ( 110 ) for forcing the circulation of the flow of molten lead ( 105 ) under pressure between said crucible ( 104 ) and said distribution means ( 16 ) by means of said feed duct ( 108 ) and said return duct ( 109 ); wherein an ultrasound generator ( 18 ) is placed to intercept the feed duct ( 108 ) and is provided with at least one tip ( 19 ) immersed in the pressurized flow of molten lead ( 105 ) that moves through said feed duct ( 108 ) in order to transmit the waves produced by the ultrasound generator ( 18 ) to said molten lead ( 105 ).