Method and device for changing strip material on a production machine
AssigneeG.D Societa' Per Azioni
InventorsFulvio Boldrini, Lorenzo Cocchi, Antonio Gamberini
Life of this patent
Estimating the term…
Abstract
A method and device whereby a first runout strip, fed at a first speed along a guide by a traction device, is replaced with a new strip by cutting the first strip; activating both a push device, by which the new strip is engaged and fed along the guide at a second speed, and a movable guide device a portion of the guide and which is lowered in relation to the rest of the guide and together with a trailing portion of the first strip on the movable guide device itself; and controlling the second speed as a function of the first speed so that a leading portion of the new strip is superimposed on the trailing portion of the first strip along the movable guide device.
Claims15
A method of changing strip material, comprising:
- cutting a first strip (3), said first strip (3) being connected to traction means (13) for being drawn and fed at a first given speed (V1) along a given path (P), said cutting of said first strip (3) defining a trailing portion (92) thereof;
- upon passage of said trailing portion (92) of said first strip (3) through a given point along said path (P), pushing a second strip (33) along said path (P) at a second given speed (V2);
- shifting said trailing portion (92) of said first strip (3) in relation to said path (P);
- controlling said second speed (V2) as a function of said first speed (V1) so that a leading portion (91) of said second strip (33) reaches and is superimposed on said trailing portion (92) of said first strip (3);
- and
- restoring said trailing portion (92) with said superimposed leading portion (91) to said path (P).
A device for changing strip material comprising two strips (3, 33);
- the device comprising traction means (13) for drawing a first of said strips (3, 33) along a given path (P) and at a first given speed (V1);
- guide means (12) defining said path (P);
- cutting means (11) for cutting the first strip (3);
- sensor means (55) for detecting passage of the trailing portion (92) of the first strip (3) through a given point along said path (P);
- and push means (9, 49), activated by said sensor means (55), for feeding the second (33) of said strips (3, 33) along said path (P) at a second given speed (V2);
- a portion (18) of said guide means (12) being a movable portion forming part of a movable guide device (17) movable to and from a guide position aligned with said path (P) and downstream from said given point in the travelling direction of said strips (3, 33);
- said second speed (V2) being variable to permit a leading portion (91) of the second strip (33) to be superimposed on the trailing portion (92) of the first strip (3) along the movable guide device (17).
Dependencies are inferred from the claim text.