EP0000033A2 - Apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation - Google Patents
Apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation Download PDFInfo
- Publication number
- EP0000033A2 EP0000033A2 EP78100055A EP78100055A EP0000033A2 EP 0000033 A2 EP0000033 A2 EP 0000033A2 EP 78100055 A EP78100055 A EP 78100055A EP 78100055 A EP78100055 A EP 78100055A EP 0000033 A2 EP0000033 A2 EP 0000033A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- fibre
- transporting
- waste
- transporting duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 61
- 238000011109 contamination Methods 0.000 title claims abstract description 11
- 238000009987 spinning Methods 0.000 title claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 244000144992 flock Species 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 230000032258 transport Effects 0.000 claims abstract description 5
- 230000004044 response Effects 0.000 claims abstract description 3
- 230000009471 action Effects 0.000 claims description 6
- 239000004753 textile Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims 4
- 239000002923 metal particle Substances 0.000 description 17
- 238000001514 detection method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
- D01G31/003—Detection and removal of impurities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
- D01B3/00—Mechanical removal of impurities from animal fibres
- D01B3/02—De-burring machines or apparatus
- D01B3/025—Removing pieces of metal
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G23/00—Feeding fibres to machines; Conveying fibres between machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C2501/00—Sorting according to a characteristic or feature of the articles or material to be sorted
- B07C2501/0036—Sorting out metallic particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S209/00—Classifying, separating, and assorting solids
- Y10S209/906—Pneumatic or liquid stream feeding item
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S209/00—Classifying, separating, and assorting solids
- Y10S209/933—Accumulation receiving separated items
Definitions
- the present invention relates to a new and improved apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation, within which duct fibre flocks are transported by an air stream.
- Fibre bales very often contain metallic objects which are pressed into such bales in the form of contaminations which are undesirable during spinning preparation.
- bale opening is effected mechanically and fibre transport to the individual opening and cleaning machines is effected pneumatically within fibre transporting ducts
- the detection and elimination of such metallic objects proves extremely difficult.
- waste fibres, which are re-processed also often contain metallic contaminations.
- metallic objects can enter the fibre transporting stream due to personnel negligence.
- two magnetic plates are arranged in a bend of the duct. These magnetic plates are offset with respect to one another in such a manner that metallic objects not caught by the first plate impact the second plate and adhere thereto.
- the magnetic plates can be pivotably opened for eliminating the metallic objects.
- This prior art device presents serious disadvantages. Thus, only magnetic metal objects are held back while all other metallic objects such as, for instance, aluminium, are not eliminated. Furthermore, it can happen that magnetic metal objects can be transported between the plates without being caught.
- the inventive apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation, through which duct there are transported fibre flocks by means of an air stream, characterized by the features that at a branching point of the transporting duct leading to a waste duct there is pivotably arranged deflecting means operatively connected with and activated by a drive mechanism.
- the deflecting means are activated in response to the passage of a metallic object or other metallic contaminations through a section of the fibre transporting,duct surrounded by a metal detector arranged upstream of the branching point, by means of a control device connected with a power source and the drive mechanism.
- the deflecting means can be shifted from an idle or ineffectual position, in which the transporting duct is open and the waste duct is maintained closed, into a working position, in which the transporting duct is closed and the waste duct is maintained open.
- a double flap can be provided as the deflecting means and an electro-pneumatic valve can be provided as the control device.
- the control device can be connected with a source of compressed air serving as the power source and with a pneumatic cylinder serving as the drive mechanism.
- the distance between the metal detector and the transporting duct branching point can be chosen of such length that the transporting time required for transporting the fibre flocks from the metal detector to the transporting duct branching point exceeds the switching time of the double flap from its idle position to its working position.
- the distance from the metal detector to the branching can be in the range of 3m at the best. It can prove advantageous to provide an air permeable waste collecting recipient at the end of the waste duct.
- Some of the more notable advantages attained by the invention is that it is possible to positively eliminate all types of metallic contaminations from the fibre transporting duct, even down to the smallest size metallic particles or contaminants. Textile equipment located downstream of the fibre transporting duct is therefore effectively safeguarded against damage. Further, the system can be easily adapted to different transporting speeds of the fibre flocks moving through the fibre transporting duct without impairing its detection capability. With the use of extremely simple means it is possible to effectively by-pass the metallic contaminants into a waste receptacle or the like following detection thereof upstream of a branching point or branching portion of the fibre transporting duct.
- any potential fire hazards which might be caused by the metallic contaminations can be detected early enough to safeguard thereagainst, and even if the metallic contaminations cause burning of the fibre flocks the same can be eliminated from the fibre transporting duct, again safeguarding any downstream arranged textile equipment from becoming damaged.
- FIG. 1 schematically shows a fibre transporting duct equipped with the metal eliminating apparatus constructed according to the teachings of the present invention.
- a fibre transporting duct 1 contains a branching element or branch portion 2 at a branching point of the duct 1 and which is connected with the continuation of such duct 1 and with a waste duct 3.
- the waste duct 3 leads via an air-mover 4 to a waste recipient or container 5 which is provided with small openings 6 at least in its upper portion.
- a double flap defining deflecting means in the branching element 2, the cross-section of which preferably is rectangular, there is arranged a double flap defining deflecting means and which contains two plates 7 which are essentially parallel to the upper and lower duct,wall.
- the double flap composed of the two plates 7 is pivotable about hinges 8 or equivalent pivot means.
- These plates 7 are interconnected by means of a rod 10 which, in turn, is supported on hinges 9.
- a tension spring 11 At the upper hinge 9 there is provided a tension spring 11, whereas the lower hinge 9 is connected via a piston rod 12 with a fluid operated, for instance, compressed air cylinder 13.
- a metal detector 14 Upstream of the branching element 2 defining a branching point of the system there is arranged a metal detector 14 on the duct 1.
- a control means or part 15 of the metal detector 14 is connected via a circuit 16 with an electro-pneumatic valve 17.
- the valve 17, which is connected via a duct 18 with a suitable source of compressed air 19, is connected via a duct 20 and a branching duct or branch line 21 with the compressed air cylinder 13 and by means of a branching duct or branch line 22 is connected with the air-mover 4.
- the compressed air cylinder 13 is pivotably hinged on a hinge 23.
- the extension (not shown) of the duct 1 can lead to any spinning preparatory machine.
- the spring 11 holds the plates 7 of the double flap in such a manner that the access to the waste duct 3 is kept closed and the fibres are transported without disturbance through the duct 1.
- the flow connection between the compressed air ducts 18 and 20 is maintained interrupted by the electro-pneumatic valve 17.
- the control part 15 simultaneously, transmits an electrical signal via the circuit 16 to the electro-pneumatic valve 17.
- the valve 17 immediately switches and provides a flow connection between the compressed air ducts 18 and 20 in such a manner that compressed air passes through the branching duct 22 to the air-mover 4 and by means of the branching duct 21 into the compressed air cylinder 13.
- the piston rod 12 now is pulled into the cylinder 13, and thus, pivots the double flap- plates 7 against the force of the tension spring 11 until the duct 1 is sealed or blocked by the upper plate 7 and the waste duct 3 is freed or uncovered by the lower plate 7.
- the control part 15 transmits a further electric signal which immediately causes interruption of the previously established flow connection with the source of compressed air 19 by the valve 17.
- the tension spring 11 now pulls back the plates 7 of the double flap into their initial position in such a manner that the waste duct 3 again is sealed and the transporting duct 1 again is open.
- the air displaced out of the compressed air cylinder 13 during this process escapes via the branch lines or branching ducts 21 and 22 into the air-mover 4.
- the fibre transporting duct 1 there now again prevails normal operation until a further metal particle transported through the duct 1 again activates the sequence of operations described above.
- Inductively functioning metal detectors are commercially available. By using such devices there can be detected the smallest metal particles down to a linear dimension of 0.25 mm. By incorporating a device of this type into the apparatus described above, all metal particles constituting any danger for any downstream arranged machine are detected and eliminated.
- the duct section on which the detector is mounted should be fabricated from a non-metallic material, for instance a plastic material.
- the metal detector 14 should be mounted sufficiently far upstream of the branching element 2. If this condition is not fulfilled, it could happen that the metal particle already has moved past the branching element 2 before the double flap composed of the plates 7 has been switched.
- the time lag between the detection of a -metal particle and the complete opening of the access to the waste duct 3 by the double flap is in the order of 0.2 seconds.
- the distance between the metal detector 14 and the branching element 2 thus should be chosen to be greater than 2 meters. If there is provided a suitable safety margin then a distance of 3 meters has been found to be favourable.
- the waste duct 3 also should not be again sealed or blocked too early. Otherwise it could happen that the metal particle passes the branching element '2 only after the waste duct 3 has again been sealed, and thus, is carried on through the extension of the transporting duct 1.
- Experiments have proven that at a speed of 10 m/sec. of the fibre and air mixture in the transporting duct 1 and if the distance of the metal detector 14 from the branching element 2 is 3 meters, then keeping the waste duct 3 open during 1 second is sufficient for eliminating any metal particle with certitude. This time lag can be pre-set in the control part 15 of the metal detector 14, and it can be of course altered if other transporting speeds are chosen to prevail in the transporting duct 1.
- the metal detector 14 transmits a second signal for maintaining open the waste duct 3 during such time as the second metal particle passes the metal detector.
- the waste duct 3, which is already opened in this case, remains open until the pre-set time lag has elapsed after the second metal particle has passed the metal detector 14 such that both metal particles are eliminated.
- waste bag or sack made from textile fabrics.
- Sufficient bag fabric porosity or air permeability is required, so that the transporting air can escape and the fibre flocks containing the metal particle are separated in the bag.
- a fire detector 26 arranged upstream of the metal detector 14 can be connected in parallel with the control part 15 of the metal detector 14 in such a manner that if smoke particles are detected by the fire detector 26, then the "burning fibre flock stream" also can be switched or by-passed to the waste recipient or container 5, in which case the re-setting of the switching or control device is interrupted. In this manner the expensive machine connected to the transporting duct can be protected against fire damage.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
- The present invention relates to a new and improved apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation, within which duct fibre flocks are transported by an air stream.
- Fibre bales very often contain metallic objects which are pressed into such bales in the form of contaminations which are undesirable during spinning preparation. In modern spinning plants where bale opening is effected mechanically and fibre transport to the individual opening and cleaning machines is effected pneumatically within fibre transporting ducts, the detection and elimination of such metallic objects proves extremely difficult. Furthermore, waste fibres, which are re-processed, also often contain metallic contaminations. Additionally, metallic objects can enter the fibre transporting stream due to personnel negligence.
- The mentioned metallic objects or the like present a great danger for the plant inasmuch as they can generate sparks and thus can cause fires. Also they can damage the transporting fans or the subsequently arranged processing machines. Therefore, attempts have been made to eliminate metallic objects from the fibre transporting ducts.
- According to a device which has become known in practise two magnetic plates are arranged in a bend of the duct. These magnetic plates are offset with respect to one another in such a manner that metallic objects not caught by the first plate impact the second plate and adhere thereto. The magnetic plates can be pivotably opened for eliminating the metallic objects. This prior art device, however, presents serious disadvantages. Thus, only magnetic metal objects are held back while all other metallic objects such as, for instance, aluminium, are not eliminated. Furthermore, it can happen that magnetic metal objects can be transported between the plates without being caught.
- It is a primary objective of the present invention to avoid these disadvantages and to devise an apparatus for eliminating all types of metals down to the smallest particle size.
- This objective is achieved by means of the inventive apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation, through which duct there are transported fibre flocks by means of an air stream, characterized by the features that at a branching point of the transporting duct leading to a waste duct there is pivotably arranged deflecting means operatively connected with and activated by a drive mechanism. The deflecting means are activated in response to the passage of a metallic object or other metallic contaminations through a section of the fibre transporting,duct surrounded by a metal detector arranged upstream of the branching point, by means of a control device connected with a power source and the drive mechanism. Within a short time the deflecting means can be shifted from an idle or ineffectual position, in which the transporting duct is open and the waste duct is maintained closed, into a working position, in which the transporting duct is closed and the waste duct is maintained open.
- According to an advantageous embodiment of the inventive apparatus a double flap can be provided as the deflecting means and an electro-pneumatic valve can be provided as the control device. The control device can be connected with a source of compressed air serving as the power source and with a pneumatic cylinder serving as the drive mechanism. The distance between the metal detector and the transporting duct branching point can be chosen of such length that the transporting time required for transporting the fibre flocks from the metal detector to the transporting duct branching point exceeds the switching time of the double flap from its idle position to its working position. At a fibre flock transporting speed of 10 m/sec the distance from the metal detector to the branching can be in the range of 3m at the best. It can prove advantageous to provide an air permeable waste collecting recipient at the end of the waste duct.
- Some of the more notable advantages attained by the invention is that it is possible to positively eliminate all types of metallic contaminations from the fibre transporting duct, even down to the smallest size metallic particles or contaminants. Textile equipment located downstream of the fibre transporting duct is therefore effectively safeguarded against damage. Further, the system can be easily adapted to different transporting speeds of the fibre flocks moving through the fibre transporting duct without impairing its detection capability. With the use of extremely simple means it is possible to effectively by-pass the metallic contaminants into a waste receptacle or the like following detection thereof upstream of a branching point or branching portion of the fibre transporting duct. Equally, any potential fire hazards which might be caused by the metallic contaminations can be detected early enough to safeguard thereagainst, and even if the metallic contaminations cause burning of the fibre flocks the same can be eliminated from the fibre transporting duct, again safeguarding any downstream arranged textile equipment from becoming damaged.
- The invention will be described in greater detail hereinafter with reference to an exemplary embodiment illustrated in the single figure of the drawing. This figure schematically shows a fibre transporting duct equipped with the metal eliminating apparatus constructed according to the teachings of the present invention.
- Describing now the drawing, a
fibre transporting duct 1 contains a branching element or branch portion 2 at a branching point of theduct 1 and which is connected with the continuation ofsuch duct 1 and with awaste duct 3. Thewaste duct 3 leads via an air-mover 4 to a waste recipient orcontainer 5 which is provided withsmall openings 6 at least in its upper portion. In the branching element 2, the cross-section of which preferably is rectangular, there is arranged a double flap defining deflecting means and which contains two plates 7 which are essentially parallel to the upper and lower duct,wall. The double flap composed of the two plates 7 is pivotable abouthinges 8 or equivalent pivot means. These plates 7 are interconnected by means of a rod 10 which, in turn, is supported onhinges 9. At theupper hinge 9 there is provided atension spring 11, whereas thelower hinge 9 is connected via apiston rod 12 with a fluid operated, for instance, compressedair cylinder 13. - Upstream of the branching element 2 defining a branching point of the system there is arranged a
metal detector 14 on theduct 1. A control means or part 15 of themetal detector 14 is connected via acircuit 16 with an electro-pneumatic valve 17. Thevalve 17, which is connected via aduct 18 with a suitable source of compressedair 19, is connected via aduct 20 and a branching duct orbranch line 21 with the compressedair cylinder 13 and by means of a branching duct or branch line 22 is connected with the air-mover 4. Thecompressed air cylinder 13 is pivotably hinged on a hinge 23. - During operation an air-stream which transports fibre flocks is sucked through the
duct 1 in the direction of thearrows 24, for instance by means of a fan which has not been particularly shown. - The extension (not shown) of the
duct 1 can lead to any spinning preparatory machine. In the normal operating state, thespring 11 holds the plates 7 of the double flap in such a manner that the access to thewaste duct 3 is kept closed and the fibres are transported without disturbance through theduct 1. The flow connection between thecompressed air ducts pneumatic valve 17. - Now if a metal object passes through the duct section surrounded by the
metal detector 14, then a current is induced in themetal detector 14. The control part 15 simultaneously, transmits an electrical signal via thecircuit 16 to the electro-pneumatic valve 17. Thevalve 17 immediately switches and provides a flow connection between thecompressed air ducts duct 21 into thecompressed air cylinder 13. Thepiston rod 12 now is pulled into thecylinder 13, and thus, pivots the double flap- plates 7 against the force of thetension spring 11 until theduct 1 is sealed or blocked by the upper plate 7 and thewaste duct 3 is freed or uncovered by the lower plate 7. - Since the compressed air flows axially in the direction toward the
waste recipient 5 into the air-mover 4, a suction action is generated, owing to the injector action, within the connecting member or portion of thewaste duct 3 connected to the branching element 2. Consequently, the fibre and air mixture is sucked from thefibre transporting duct 1 into thewaste duct 3 and is transported into the waste recipient orcontainer 5. At this location the transporting air escapes via theopenings 6, whereas the entrained fibre flocks are deposited. As the time lag between the detection of a metal particle and the switching of the double flap structure is shorter than the time required for transporting the metal particle to the region of the branching element 2, the metal particle together with the fibre flocks are guided via thewaste duct 3 into the waste recipient orcontainer 5. - After there has elapsed a time lag, which can be pre-set on a key 25 or equivalent structure of the control means or part 15, and during which time lag the metal particle has been positively eliminated into the
waste duct 3, the control part 15 transmits a further electric signal which immediately causes interruption of the previously established flow connection with the source of compressedair 19 by thevalve 17. Thetension spring 11 now pulls back the plates 7 of the double flap into their initial position in such a manner that thewaste duct 3 again is sealed and the transportingduct 1 again is open. The air displaced out of the compressedair cylinder 13 during this process escapes via the branch lines or branchingducts 21 and 22 into the air-mover 4. In thefibre transporting duct 1 there now again prevails normal operation until a further metal particle transported through theduct 1 again activates the sequence of operations described above. - Inductively functioning metal detectors are commercially available. By using such devices there can be detected the smallest metal particles down to a linear dimension of 0.25 mm. By incorporating a device of this type into the apparatus described above, all metal particles constituting any danger for any downstream arranged machine are detected and eliminated. In order to ensure reliable functioning of the metal detector, the duct section on which the detector is mounted should be fabricated from a non-metallic material, for instance a plastic material.
- For reliable functioning of the described apparatus, the
metal detector 14 should be mounted sufficiently far upstream of the branching element 2. If this condition is not fulfilled, it could happen that the metal particle already has moved past the branching element 2 before the double flap composed of the plates 7 has been switched. Experiments have proven that the time lag between the detection of a -metal particle and the complete opening of the access to thewaste duct 3 by the double flap is in the order of 0.2 seconds. At a transporting speed of the air and fibre mixture in the transportingduct 1 in the order of 10 m/sec. the distance between themetal detector 14 and the branching element 2 thus should be chosen to be greater than 2 meters. If there is provided a suitable safety margin then a distance of 3 meters has been found to be favourable. - Furthermore, since larger metal particles tend to move through the
fibre transporting duct 1 at lower speeds than the air and fibre mixture, thewaste duct 3 also should not be again sealed or blocked too early. Otherwise it could happen that the metal particle passes the branching element '2 only after thewaste duct 3 has again been sealed, and thus, is carried on through the extension of the transportingduct 1. Experiments have proven that at a speed of 10 m/sec. of the fibre and air mixture in the transportingduct 1 and if the distance of themetal detector 14 from the branching element 2 is 3 meters, then keeping thewaste duct 3 open during 1 second is sufficient for eliminating any metal particle with certitude. This time lag can be pre-set in the control part 15 of themetal detector 14, and it can be of course altered if other transporting speeds are chosen to prevail in the transportingduct 1. - If the very unlikely case should occur that two metal particles pass through the transporting
duct 1 at a very short interval, themetal detector 14 transmits a second signal for maintaining open thewaste duct 3 during such time as the second metal particle passes the metal detector. Thewaste duct 3, which is already opened in this case, remains open until the pre-set time lag has elapsed after the second metal particle has passed themetal detector 14 such that both metal particles are eliminated. - Incorporation of an air-mover 4 in the
waste duct 3 is required as the fibre flocks are sucked through the transportingduct 1 under the influence of a vacuum. If the transportingduct 1 is sealed off in such a manner that there no longer prevails any suction action, then the air-mover 4, which works according to the injector principle, generates the suction action required in thewaste duct 3. Further transport of the fibre flocks downstream of the air-mover 4 into thewaste recipient 5 is effected under above- atmospheric pressure as the compressed air enters in axial direction over the circumference of the air-mover 4. Air- movers or equivalent structure also are available commercially. Instead of a waste recipient orcontainer 5 made from perforated sheet metal there also could be used a waste bag or sack made from textile fabrics. Sufficient bag fabric porosity or air permeability, however, is required, so that the transporting air can escape and the fibre flocks containing the metal particle are separated in the bag. - Additionally, a
fire detector 26 arranged upstream of themetal detector 14 can be connected in parallel with the control part 15 of themetal detector 14 in such a manner that if smoke particles are detected by thefire detector 26, then the "burning fibre flock stream" also can be switched or by-passed to the waste recipient orcontainer 5, in which case the re-setting of the switching or control device is interrupted. In this manner the expensive machine connected to the transporting duct can be protected against fire damage.
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH7094/77 | 1977-06-09 | ||
CH709477A CH619991A5 (en) | 1977-06-09 | 1977-06-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0000033A2 true EP0000033A2 (en) | 1978-12-20 |
EP0000033A3 EP0000033A3 (en) | 1979-01-10 |
EP0000033B1 EP0000033B1 (en) | 1980-10-15 |
Family
ID=4319842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78100055A Expired EP0000033B1 (en) | 1977-06-09 | 1978-06-01 | Apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation |
Country Status (10)
Country | Link |
---|---|
US (1) | US4171262A (en) |
EP (1) | EP0000033B1 (en) |
JP (1) | JPS546923A (en) |
AR (1) | AR220711A1 (en) |
BR (1) | BR7803697A (en) |
CH (1) | CH619991A5 (en) |
DE (1) | DE2860213D1 (en) |
ES (1) | ES471138A1 (en) |
IN (1) | IN151438B (en) |
IT (1) | IT1095542B (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2499103A1 (en) * | 1981-02-05 | 1982-08-06 | Truetzschler & Co | METHOD AND APPARATUS FOR REMOVING FOREIGN BODIES OF COTTON FLAKES TRANSPORTED BY A COMPRESSED AIR CURRENT |
FR2571502A1 (en) * | 1984-10-05 | 1986-04-11 | Truetzschler & Co | DEVICE FOR DETECTING FOREIGN BODIES SUCH AS, IN PARTICULAR, METAL OR EQUIVALENT OBJECTS, IN BALLS OF TEXTILE FIBERS |
FR2590597A1 (en) * | 1985-11-25 | 1987-05-29 | Tempo Sanys | Installation for detecting metal particles in cotton |
GB2200374A (en) * | 1986-12-24 | 1988-08-03 | Truetzschler & Co | Method and apparatus for identifying foreign bodies inside or between textile fibre flocks |
EP0364786A1 (en) * | 1988-10-11 | 1990-04-25 | Maschinenfabrik Rieter Ag | Identification of foreign matter in textile fibres |
EP0402941A1 (en) * | 1989-06-16 | 1990-12-19 | Maschinenfabrik Rieter Ag | Transport air control |
CH676475A5 (en) * | 1988-10-28 | 1991-01-31 | Jossi Hans Praezisionsmechanik | |
EP0414961A2 (en) * | 1989-08-28 | 1991-03-06 | Tatsumi Air Engineering Co., Ltd. | Apparatus for detecting extraneous matter in raw cotton |
GB2241965A (en) * | 1990-02-22 | 1991-09-18 | Truetzschler & Co | Apparatus and method for feeding a fibre-processing machine |
US5123144A (en) * | 1989-08-09 | 1992-06-23 | Maschinenfabrik Rieter Ag | Method and apparatus for establishing whether fiber material is contaminated with foreign objects |
GB2260145A (en) * | 1991-09-19 | 1993-04-07 | Truetzschler Gmbh & Co Kg | Separation device in a feed line for pneumatically conveying textile fibres |
US5247722A (en) * | 1990-02-22 | 1993-09-28 | Trutzschler Gmbh & Co. Kg | Method and apparatus for pneumatically introducing fiber to a fiber processing machine |
GB2300480A (en) * | 1995-05-05 | 1996-11-06 | Truetzschler Gmbh & Co Kg | Detecting and separating coloured and metallic foreign matter from fibre material |
EP0780499A3 (en) * | 1995-12-20 | 1997-12-03 | Hubert A. Dipl.-Ing. Dipl.-Wirtsch.-Ing. Hergeth | Sector cylinder |
EP0967305A1 (en) * | 1998-06-25 | 1999-12-29 | Jossi Holding AG | Method and apparatus for removing foreign matters from fiber material,especially from cotton |
DE4129882C2 (en) * | 1990-09-17 | 2002-02-07 | Truetzschler Gmbh & Co Kg | Device for separating metallic contaminants from a fiber transport path in the spinning preparation |
WO2008015615A2 (en) * | 2006-08-03 | 2008-02-07 | Louis Padnos Iron And Metal Company | Sorting system |
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US4480753A (en) * | 1979-07-12 | 1984-11-06 | Metal Detectors, Inc. | Metal detector apparatus and method |
US4387064A (en) * | 1981-08-03 | 1983-06-07 | Werderitch Frank J | Method and apparatus for sorting defective parts |
SE437621B (en) * | 1983-12-27 | 1985-03-11 | Peter Stromgren | DEVICE FOR Separation of Cutlery from Waste Disposal |
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DE3533390A1 (en) * | 1985-09-19 | 1987-03-19 | Merten Kg Pulsotronic | DEVICE FOR SEPARATING METAL PARTICLES |
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DE3708188C2 (en) * | 1987-03-13 | 1998-10-29 | Hergeth Hubert A | Process for the detection of foreign parts in a textile fiber processing plant |
AU611482B2 (en) * | 1987-08-28 | 1991-06-13 | Commonwealth Scientific And Industrial Research Organisation | Sorting pneumatically conveyed material |
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- 1978-05-26 AR AR272341A patent/AR220711A1/en active
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- 1978-06-01 EP EP78100055A patent/EP0000033B1/en not_active Expired
- 1978-06-01 DE DE7878100055T patent/DE2860213D1/en not_active Expired
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FR978026A (en) * | 1941-03-22 | 1951-04-09 | Safeguards for machines for breaking up, cutting, feeding or working cotton waste or other fibrous material | |
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US3984307A (en) * | 1973-03-05 | 1976-10-05 | Bio/Physics Systems, Inc. | Combined particle sorter and segregation indicator |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2499103A1 (en) * | 1981-02-05 | 1982-08-06 | Truetzschler & Co | METHOD AND APPARATUS FOR REMOVING FOREIGN BODIES OF COTTON FLAKES TRANSPORTED BY A COMPRESSED AIR CURRENT |
FR2571502A1 (en) * | 1984-10-05 | 1986-04-11 | Truetzschler & Co | DEVICE FOR DETECTING FOREIGN BODIES SUCH AS, IN PARTICULAR, METAL OR EQUIVALENT OBJECTS, IN BALLS OF TEXTILE FIBERS |
FR2590597A1 (en) * | 1985-11-25 | 1987-05-29 | Tempo Sanys | Installation for detecting metal particles in cotton |
GB2200374A (en) * | 1986-12-24 | 1988-08-03 | Truetzschler & Co | Method and apparatus for identifying foreign bodies inside or between textile fibre flocks |
US4839943A (en) * | 1986-12-24 | 1989-06-20 | Trutzschler Gmbh & Co. Kg | Apparatus for detecting foreign bodies in a fiber tuft mass |
GB2200374B (en) * | 1986-12-24 | 1990-08-08 | Truetzschler Gmbh & Co Kg | Method and apparatus for identifying foreign bodies inside or between textile fibre flocks |
EP0364786A1 (en) * | 1988-10-11 | 1990-04-25 | Maschinenfabrik Rieter Ag | Identification of foreign matter in textile fibres |
CH676475A5 (en) * | 1988-10-28 | 1991-01-31 | Jossi Hans Praezisionsmechanik | |
EP0402941A1 (en) * | 1989-06-16 | 1990-12-19 | Maschinenfabrik Rieter Ag | Transport air control |
US5143485A (en) * | 1989-06-16 | 1992-09-01 | Maschinenfabrik Rieter Ag | Transport air control |
US5123144A (en) * | 1989-08-09 | 1992-06-23 | Maschinenfabrik Rieter Ag | Method and apparatus for establishing whether fiber material is contaminated with foreign objects |
EP0414961A3 (en) * | 1989-08-28 | 1992-01-15 | Tatsumi Air Engineering Co., Ltd. | Apparatus for detecting extraneous matter in raw cotton |
EP0414961A2 (en) * | 1989-08-28 | 1991-03-06 | Tatsumi Air Engineering Co., Ltd. | Apparatus for detecting extraneous matter in raw cotton |
GB2241965A (en) * | 1990-02-22 | 1991-09-18 | Truetzschler & Co | Apparatus and method for feeding a fibre-processing machine |
US5247722A (en) * | 1990-02-22 | 1993-09-28 | Trutzschler Gmbh & Co. Kg | Method and apparatus for pneumatically introducing fiber to a fiber processing machine |
GB2241965B (en) * | 1990-02-22 | 1993-11-24 | Truetzschler Gmbh & Co Kg | Apparatus and method for feeding a fibre-processing machine |
DE4129882C2 (en) * | 1990-09-17 | 2002-02-07 | Truetzschler Gmbh & Co Kg | Device for separating metallic contaminants from a fiber transport path in the spinning preparation |
GB2260145B (en) * | 1991-09-19 | 1995-05-17 | Truetzschler Gmbh & Co Kg | Separation device in a feed line for pneumatically conveying textile fibres |
GB2260145A (en) * | 1991-09-19 | 1993-04-07 | Truetzschler Gmbh & Co Kg | Separation device in a feed line for pneumatically conveying textile fibres |
GB2300480A (en) * | 1995-05-05 | 1996-11-06 | Truetzschler Gmbh & Co Kg | Detecting and separating coloured and metallic foreign matter from fibre material |
US5819373A (en) * | 1995-05-05 | 1998-10-13 | Trutzschler Gmbh & Co. Kg | Apparatus and method for recognizing and separating foreign bodies from fiber in a fiber processing machine |
GB2300480B (en) * | 1995-05-05 | 1999-10-13 | Truetzschler Gmbh & Co Kg | Apparatus and method for detecting and separating foreign matter from fibre material |
EP0780499A3 (en) * | 1995-12-20 | 1997-12-03 | Hubert A. Dipl.-Ing. Dipl.-Wirtsch.-Ing. Hergeth | Sector cylinder |
EP0967305A1 (en) * | 1998-06-25 | 1999-12-29 | Jossi Holding AG | Method and apparatus for removing foreign matters from fiber material,especially from cotton |
WO2008015615A2 (en) * | 2006-08-03 | 2008-02-07 | Louis Padnos Iron And Metal Company | Sorting system |
WO2008015615A3 (en) * | 2006-08-03 | 2008-05-02 | Louis Padnos Iron And Metal Co | Sorting system |
Also Published As
Publication number | Publication date |
---|---|
EP0000033B1 (en) | 1980-10-15 |
IT7823793A0 (en) | 1978-05-25 |
JPS546923A (en) | 1979-01-19 |
AR220711A1 (en) | 1980-11-28 |
US4171262A (en) | 1979-10-16 |
IN151438B (en) | 1983-04-23 |
ES471138A1 (en) | 1979-09-01 |
DE2860213D1 (en) | 1981-01-22 |
CH619991A5 (en) | 1980-10-31 |
IT1095542B (en) | 1985-08-10 |
BR7803697A (en) | 1979-01-16 |
EP0000033A3 (en) | 1979-01-10 |
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