Method and device for removing a ring-shaped label from a pack of substantially identical, abutting ring-shaped labels, label-transferring device and system for producing plastic injection-moulded products

A method for removing a ring-shaped label from a pack of substantially identical, abutting ring-shaped labels, comprising:

• accommodating the pack of ring-shaped labels on a guide rod of a storage holder by pushing the ring-shaped labels onto the guide rod by means of their central openings, which storage holder is provided with a stop for determining a storage position of said pack of ring-shaped labels, in which the pack of ring-shaped labels abuts against the stop by means of a bottom ring-shaped label of said pack on account of the force of gravity and is situated at a distance from a stop surface of a pick-up head by means of a top ring-shaped label of said pack,
• displacing at least a part of the pack of ring-shaped labels along the guide rod to a discharge position, in which the pack of ring-shaped labels or a part thereof is pushed against the stop surface of the pick-up head by means of the top ring-shaped label,
• holding the top ring-shaped label which is pushed against the stop surface of the pick-up head in the discharge position against the stop surface of the pick-up head,
• wherein
• when the pack of ring-shaped labels is accommodated on the guide rod in the storage position, at least a part of the pack of ring-shaped labels is displaced along the guide rod to the discharge position by exerting an impact force on said pack of ring-shaped labels such that at least a part of said pack moves autonomously, counter to the effect of the force of gravity, to the discharge position, and
• at least one blast of air is delivered which is directed between the retained label and the adjacent ring-shaped label such a manner that the adjacent ring-shaped label is blown off the retained label.

A device for removing a ring-shaped label from a pack of substantially identical, abutting ring-shaped labels, which device comprises:

• a pick-up head which is provided with a stop surface and retaining devices for holding a ring-shaped label against the stop surface,
• a storage holder for accommodating the pack of ring-shaped labels, which storage holder is provided with a guide rod for receiving a central opening of the ring-shaped labels of the pack of ring-shaped labels, and which storage holder is provided with a stop for determining, when the pack of ring-shaped labels is accommodated on the guide rod, a storage position of said pack of ring-shaped labels, in which the pack of ring-shaped labels abuts against the stop on account of the force of gravity by means of a bottom ring-shaped label of said pack and is situated at a distance from the stop surface of the pick-up head by means of a top ring-shaped label of said pack,
• a displacement device for displacing, when the pack of ring-shaped labels is accommodated on the guide rod in the storage position, at least a part of said pack of ring-shaped labels along the guide rod to a discharge position, in which the pack of ring-shaped labels or a part thereof is pushed against the stop surface of the pick-up head by means of the top ring-shaped label and the top ring-shaped label can be held by the retaining devices of the stop surface of the pick-up head,
• wherein the displacement device is configured, when the pack of ring-shaped labels is accommodated on the guide rod in the storage position, to exert such an impact force on said pack of ring-shaped labels that at least a part of said pack moves autonomously, counter to the effect of the force of gravity, to the discharge position,
• wherein the displacement device is configured in such a manner that the impact force which is exerted on the pack of ring-shaped labels in the storage position is formed by a blast of air which is blown against one or more of the ring-shaped labels of said pack, and
• the device is provided with an air-blasting device for dispensing at least one blast of air which, when the top ring-shaped label is held against the stop surface of the pick-up head by the retaining devices, is directed between the retained, top ring-shaped label and the adjacent ring-shaped label of the pack of ring-shaped labels, in such a manner that said adjacent ring-shaped label is blown off the retained, top ring-shaped label.