Method and machine for producing bags containing fiber material

摘要

A method for producing bags containing fiber material, comprises the steps of forming at least one continuous layer of fiber material; separating in succession portions of fiber material from the continuous layer and moving them along a predetermined path; feeding each portion of fiber material to respective containment and compaction elements of a first transfer conveyor; feeding an ordered succession of bags containing respective portions of fiber material to respective supporting elements of a second transfer conveyor; transferring the portions of fiber material into respective housings of a third transfer conveyor; transferring the portions from the third transfer conveyor inside respective containment bags carried by a second transfer conveyor; transferring the containment bags from the second transfer conveyor to a fourth transfer conveyor; and moving in succession the bags housing respective portions of fiber material to a folding unit at which the bags are closed.

主权项

1. A method for producing bags containing fiber material, comprising:
forming two continuous layers side by side of fiber material; weighing a leading end portion of each continuous layer with respective weighing devices; separating the leading end portion of each of the two continuous layers into a succession of portions of fiber material separate from each other and moving the portions of fiber material along respective predetermined paths, wherein the separating the leading end portion of each of the two continuous layers into the succession of portions of fiber material is based on respective weight values measured by the respective weighing devices and is activated by a control unit according to a defined time scale such that the portions of fiber material are obtained by separation of the respective continuous layer when the weight of the leading end portions is equal to, or just under, a nominal target weight of the portions of fiber material; feeding in succession pairs of the portions of fiber material coming from the two predetermined paths to containment and compaction elements supported by a first transfer conveyor and each for receiving a portion of fiber material; feeding an ordered succession of bags for containing respective portions of fiber material to respective supporting elements of a second transfer conveyor; simultaneously transferring the portions of fiber material forming part of each pair from the containment and compaction elements of the first transfer conveyor into respective housings of a third transfer conveyor; simultaneously transferring the portions of fiber material forming part of each pair from the housings of the third transfer conveyor into respective containment bags carried by supporting elements of the second transfer conveyor; transferring the pairs of containment bags housing respective portions of fiber material from the respective supporting elements of the second transfer conveyor to a fourth transfer conveyor; and moving in succession the bags housing respective portions of fiber material to a folding unit at which the bags are closed.