AN ONLINE SYSTEM FOR IDENTIFICATION AND REJECTION OF UNDESIRABLE FOREIGN MATERIAL/CONTAMINATION IN FIBRE STREAM

摘要

An online system for identifying foreign material like jute, hair, paper pieces, polythene, polypropylene, leaf, bits of leaf, other vegetable fibre etc. in fibre streams and the like such as cotton and if the size / quantum of the same exceeds a pre-set acceptable threshold level, rejecting the portion of the fibre containing the same. Importantly, the online system comprises a feeder assembly adapted for regulated and uniformly spread flow of the fibre material to facilitate the detection of foreign materials/contaminant, a detector means for detection of foreign material/contaminants ,signal processing means to generate signals and ejector means adapted to open only when said foreign material/contaminant detected is beyond a preset threshold level. Preferably, in the system of the invention the detection of foreign materials/contaminants in fibre web involve use of opto detectors adapted for easy cleaning of the system as and when required. The system would thus provide for an effective, simple and cost-effective method of identification and rejection of unwanted foreign material/contaminants from fibre streams such as cotton tuft web/flow in blow rooms and the like. The system further provides for improvement in the method of detection and at the same time ensure that rejection in said foreign materials/contaminants is carried out with much reduced loss of good fibre. Importantly also the system is adapted for use in any conventional blow room operations.