Machine for making filter bags for infusion products

摘要

A machine (100) for making filter bags (1) for infusion products comprises: a station (2) for feeding a first continuous strip (3) of thermoformable filter material; a station (4) for heating the first continuous strip (3); a continuously rotating drum (5) provided with a series of dies (9), and a corresponding series of punches (10) configured for plastically deforming a portion of the first strip (3) and making a three-dimensional chamber (C) to contain a dose (12) of infusion product; a station (11) for dosing doses (12) of the infusion product; a feed station (13) for feeding a second strip (14) of filter material; a joining station (15) for joining the first strip (3) to the second strip (14) to close the three-dimensional chamber (C); and a cutting station for making single filter bags (1).

主权项

1. A machine for making filter bags (1) for infusion products formed from lengths of filter material,characterized in that it comprises at least:
a station (2) for feeding a first continuous strip (3) of thermoformable filter material movable along a working path (P); a station (4) for heating the first continuous strip (3) of filter material, located along the working path (P) and including means (22) for heating the first continuous strip (3) of filter material at a predetermined temperature; a drum (5) for forming a first portion (3P) of the filter bags (1) disposed downstream of the station (4) for heating along the working path (P); said drum (5) having three mutually concentric circular parts (6, 7, 19) continuously rotating in phase about a single axis (X) of rotation; a first circular part (6) of the drum (5) being provided with a series of radial dies (9), and a second part (7) having a corresponding series of forming punches (10) for forming the first strip (3) of filter material and adapted to plastically deform a portion of the first strip (3) of filter material inside a corresponding die (9) at least for a predetermined arcuate stretch (T) of a circular path followed by the drum (5), so as to form an open three-dimensional chamber (C) of filter material and a third part (19) for moving each punch in opposing directions; a station (11) for dosing a dose (12) of infusion product and configured for placing, the dose (12), in phase with the drum (5), inside the open three-dimensional chamber (C) of filter material; a station (13) for feeding a second continuous strip (14) of filter material and configured for placing the second continuous strip (14) above the first continuous strip (3) of filter material with the three-dimensional chambers (C) with the dose (12) of infusion product, so as to define a flat base that closes the filter bags (1); a station (15) for joining/closing the second continuous strip (14) of filter material onto the first continuous strip (3) of filter material and located along the working path (P), downstream of the station (13) for feeding the second continuous strip (14) of filter material; a cutting station (16) for making a sequence of single, flat-based filter bags (1) by cutting the first and the second continuous strip (3, 14) of filter material; the cutting station (16) being located downstream of the joining/closing station (15) along said working path (P).