Accordingly with the invention, during the spreading phase, plies stacked in each cutting position can be sep- arated into different groups by applying one flexible film ply, called "separator film" between groups. The appli- cation of the separator film is provided by means of a "separating spreader". It is desirable to provide an appa- ratus for separating plies that is efficient and does not increase sheet material spreading time. It is an object of the present invention in its preferred embodiment at least to provide a method for applying separating film that min- imize the time required for spread separating film. It is a further object of the present invention in its preferred em- bodiment at least to provide a method for accommodates a separating film at different heights at different cutting positions in the lay-up. It is a another object of the present invention in its preferred embodiment at least to provide a method that ensure that the separating film is applied without both stopping the sheet material spreading and requiring a spreader set-up operation. Moreover in ac- cordance with the present invention, the spreader is pro- vided by an innovative operating method oriented to the minimization of the number of lay-ups formed Indeed, the lower are the spreading time and the cutting time spent to process the current workload, the higher are the productivity performance of the system. Since the cutting patterns are pre-established, it is an object of the present invention to provide a method to compose single lay-up in order to maximize the length of spread plies (i.e. to minimize supply roll changes and the number of distinct spreading operations) as well as to maximize cutting po- sitions heights (i.e. minimize of the number of cutting po- sitions).
A method for spreading and cutting flexible sheet materials
GRIECO, Antonio Domenico;
2007-01-01
Abstract
Accordingly with the invention, during the spreading phase, plies stacked in each cutting position can be sep- arated into different groups by applying one flexible film ply, called "separator film" between groups. The appli- cation of the separator film is provided by means of a "separating spreader". It is desirable to provide an appa- ratus for separating plies that is efficient and does not increase sheet material spreading time. It is an object of the present invention in its preferred embodiment at least to provide a method for applying separating film that min- imize the time required for spread separating film. It is a further object of the present invention in its preferred em- bodiment at least to provide a method for accommodates a separating film at different heights at different cutting positions in the lay-up. It is a another object of the present invention in its preferred embodiment at least to provide a method that ensure that the separating film is applied without both stopping the sheet material spreading and requiring a spreader set-up operation. Moreover in ac- cordance with the present invention, the spreader is pro- vided by an innovative operating method oriented to the minimization of the number of lay-ups formed Indeed, the lower are the spreading time and the cutting time spent to process the current workload, the higher are the productivity performance of the system. Since the cutting patterns are pre-established, it is an object of the present invention to provide a method to compose single lay-up in order to maximize the length of spread plies (i.e. to minimize supply roll changes and the number of distinct spreading operations) as well as to maximize cutting po- sitions heights (i.e. minimize of the number of cutting po- sitions).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
