EP0000033B1 - 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 PDF

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Publication number
EP0000033B1
EP0000033B1 EP78100055A EP78100055A EP0000033B1 EP 0000033 B1 EP0000033 B1 EP 0000033B1 EP 78100055 A EP78100055 A EP 78100055A EP 78100055 A EP78100055 A EP 78100055A EP 0000033 B1 EP0000033 B1 EP 0000033B1
Authority
EP
European Patent Office
Prior art keywords
duct
fibre
transporting
metal detector
waste
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.)
Expired
Application number
EP78100055A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0000033A3 (en
EP0000033A2 (en
Inventor
Werner Lattmann
Rudolf Wildbolz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0000033A2 publication Critical patent/EP0000033A2/en
Publication of EP0000033A3 publication Critical patent/EP0000033A3/xx
Application granted granted Critical
Publication of EP0000033B1 publication Critical patent/EP0000033B1/en
Expired legal-status Critical Current

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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 3 m 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.
  • 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 branched 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.
  • 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 1 7.
  • 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 plastics 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 passed 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 resetting 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)
EP78100055A 1977-06-09 1978-06-01 Apparatus for eliminating metallic contaminations from a fibre transporting duct in spinning preparation Expired EP0000033B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH709477A CH619991A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-06-09 1977-06-09
CH7094/77 1977-06-09

Publications (3)

Publication Number Publication Date
EP0000033A2 EP0000033A2 (en) 1978-12-20
EP0000033A3 EP0000033A3 (en) 1979-01-10
EP0000033B1 true 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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0000033B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS546923A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AR (1) AR220711A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR7803697A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH619991A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2860213D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES471138A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IN (1) IN151438B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT1095542B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830394A1 (de) * 1998-07-08 2000-01-13 Schlafhorst & Co W Saugluftanlage einer Textilmaschine
CN113668072A (zh) * 2020-05-13 2021-11-19 宣城明佳羽绒有限公司 一种羽毛羽绒生产工艺

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US6724305B2 (en) 2001-05-25 2004-04-20 Golden West Sales Pulse induction silverware detector
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US20080029445A1 (en) * 2006-08-03 2008-02-07 Louis Padnos Iron And Metal Company Sorting system
ES2469715B1 (es) * 2011-02-25 2014-12-04 Tna Australia Pty Limited Detector de metales
CN105297192A (zh) * 2015-11-27 2016-02-03 齐鲁宏业纺织集团有限公司 一种输棉用火星测探器
US9715030B1 (en) * 2016-03-07 2017-07-25 Matias SaavedraSilvia Object detection and removal apparatus
CN107956008A (zh) * 2017-12-26 2018-04-24 颍上鑫鸿纺织科技有限公司 一种输棉用火星防治系统
CN108823689A (zh) * 2018-08-09 2018-11-16 赵南南 一种开清棉工序的漏棉装置
CN112981547B (zh) * 2021-02-04 2022-06-14 卓小利 一种羊毛清洗装置

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Publication number Priority date Publication date Assignee Title
DE19830394A1 (de) * 1998-07-08 2000-01-13 Schlafhorst & Co W Saugluftanlage einer Textilmaschine
US6317645B1 (en) 1998-07-08 2001-11-13 W. Schlafhorst Ag & Co. Suction-air system of a textile machine
CN113668072A (zh) * 2020-05-13 2021-11-19 宣城明佳羽绒有限公司 一种羽毛羽绒生产工艺

Also Published As

Publication number Publication date
BR7803697A (pt) 1979-01-16
AR220711A1 (es) 1980-11-28
DE2860213D1 (en) 1981-01-22
CH619991A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-10-31
JPS546923A (en) 1979-01-19
ES471138A1 (es) 1979-09-01
IN151438B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1983-04-23
EP0000033A3 (en) 1979-01-10
EP0000033A2 (en) 1978-12-20
IT7823793A0 (it) 1978-05-25
IT1095542B (it) 1985-08-10
US4171262A (en) 1979-10-16

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