Device for selective collecting of portions by cutting from a sheet arranged on a work plane

摘要

A device for selective collecting of portions fashioned by cutting from a sheet arranged on a work plane (2), has a removing group (4) subdivided into sections having holes connected selectively either to an aspirating source (D) or a compressed-air source, an activator moving the removing group. A command and control device directs the activator, aspirating source and the compressed-air source, for connecting the aspirating source with at least a fraction of the holes facing the upper surface of a selected portion, and the compressed-air source (P) with a fraction of the holes facing an upper surface of a strip which delimits the outline of the selected portion to raise the removing group (4) with a consequent engaging of only the selected portion (R).

主权项

1. A device for selective collecting of portions removed by cutting from a sheet arranged on a work plane comprising:
a cutting unit, cooperating with the work plane in order to cut a selected portion from the sheet resting thereon; at least two collecting containers, arranged to receive cut portions according to predefined ordering criteria; a removing group, subdivided into sections, each section having holes opening into a lower surface of the removing group, the device including at least one first valve and at least one second valve connected to the holes of each section, the holes of each section being connectable selectively either to an aspirating source by the at least one first valve or a compressed-air source by the at least one second valve; an activator configured for moving the removing group to a first position in which the lower surface of the removing group is adhered onto the sheet on the work plane so that a first plurality of the holes of the sections faces an upper surface of the selected cut portion and a second plurality of the holes of the sections faces an upper surface of a strip of the sheet which delimits a border of the selected cut portion, and a second position in which the removing group is situated above one of the collecting containers; a command and control board for commanding the activator, the aspirating source and the compressed-air source, the command and control board being predisposed and configured to connect, in phase relation with the moving of the removing group into the first position, the aspirating source with the first plurality of holes facing the upper surface of the selected cut portion, and the compressed-air source with the second plurality of holes facing the upper surface of the strip of the sheet which delimits a border of the selected cut portion, so that the upper surface of the selected cut portion is subjected to an aspirating action directed upwards and the upper surface of the strip is subjected to a blowing action directed downwards, and to raise the removing group actuated in phase relation with a disconnecting of the compressed-air source from the second plurality of holes facing the strip, and a consequent engaging of only the selected cut portion to the removing group by the upwards aspirating action via the first plurality of holes, and to move the removing group to position the group superiorly of a corresponding one of the collecting containers, and to disconnect the first plurality of holes facing the upper surface of the selected cut portion from the aspirating source, to release the selected cut portion from the removing group, for deposit into the corresponding one of the collecting containers.