EP2057309B1 - Rotordüsekonverter - Google Patents

Rotordüsekonverter Download PDF

Info

Publication number
EP2057309B1
EP2057309B1 EP07723883A EP07723883A EP2057309B1 EP 2057309 B1 EP2057309 B1 EP 2057309B1 EP 07723883 A EP07723883 A EP 07723883A EP 07723883 A EP07723883 A EP 07723883A EP 2057309 B1 EP2057309 B1 EP 2057309B1
Authority
EP
European Patent Office
Prior art keywords
rotor
blade
rotor nozzle
cutting edge
cutting
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.)
Not-in-force
Application number
EP07723883A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2057309A1 (de
Inventor
Nils Schedukat
Richard Ramakers
Thomas Gries
Richard Brüssel
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.)
Schmidt und Heinzmann GmbH and Co KG
Original Assignee
Schmidt und Heinzmann GmbH and Co KG
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 Schmidt und Heinzmann GmbH and Co KG filed Critical Schmidt und Heinzmann GmbH and Co KG
Priority to EP11003356.0A priority Critical patent/EP2351880B1/de
Publication of EP2057309A1 publication Critical patent/EP2057309A1/de
Application granted granted Critical
Publication of EP2057309B1 publication Critical patent/EP2057309B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
    • D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting

Definitions

  • the invention relates to a rotary nozzle converter for converting one or more endless yarns into staple fibers.
  • the invention is therefore in particular the object of providing a converter with which fibers or yarns can be optimally cut.
  • the invention relates to a rotary nozzle converter for converting one or more endless yarns into staple fibers by means of a rotor nozzle and a cutter, wherein the nozzle function is integrated into the rotor and the yarn is deflected by an angle of less than 90 °.
  • a cutting should be understood here preferably a blade with at least one cutting edge.
  • the rotor nozzle sucks the fiber strand itself and conveys it by means of a supplied gas stream, preferably by means of air, at the same speed at which the endless yarn is fed to a nozzle exit of the rotor.
  • the self-priming of the nozzle allows integration of the rotor nozzle converter in a running process for further processing of the staple fibers and reduces the air consumption of the converter with respect to a separate arrangement of nozzle and rotor.
  • a so-called in-line circuit is important to ensure the purity of the material and to avoid yarn damage by winding operations, recrystallization, storage and transport.
  • the process becomes more productive by combining individual stages. Thereby a higher process speed and the saving of costs are possible.
  • deflecting the yarn at an angle of less than 90 ° all fiber types can be processed.
  • the deflection of the yarn causes the yarn to exit at an outer edge of the rotor nozzle, thereby moving and cutting the yarn at an increased speed.
  • a second cutting edge is provided.
  • this acts as a counter-blade to the first cutting edge.
  • the design allows separation of fibers of soft and tough nature, since the two cutting edges develop sufficient force to cut tough fibers as well, with the second cutting edge applying a counter pressure to the pressure developed by the first cutting edge.
  • the second cutting edge is rotatably mounted. Due to the rotation of the second cutting edge, the two cutting edges are not in constant contact. As a result, the generation of heat is avoided because the two edges only touch once per revolution of the rotor.
  • the second cutting edge is fixed to the rotor. This allows a simple construction of the converter, as can be dispensed with a separate storage of the second cutting edge.
  • the second cutting edge may be an attachment plate, which is applied to a surface of the Rotordüsekonverters, preferably an end face of the Rotordüsekonverters in which at least one outlet opening of the yarn is applied to the entire extent and at least one recess which releases the outlet opening and the is cut like a blade at its edges.
  • the second cutting edge cover a front side of the rotor nozzle in a segment-like manner.
  • the side of the rotor nozzle is defined as the end face on which the outlet opening of the endless yarn is arranged.
  • Segment-like in this context means that the second cutting only covers a portion of the end face of the Rotordüsekonverters and remain free large parts of the total area.
  • the second cutting edge is formed as a sheet metal part which is beveled like a blade on the side facing the outlet opening of the yarn. In addition, this sheet metal part is easy and inexpensive to produce or replace.
  • a cutting edge of the second cutting edge forms a secant to an exit opening of the yarn.
  • the cutting edge of the second cutting edge is arranged on one side of the exit opening of the yarn, which, in one embodiment of a cut, viewed in a projection view, lies opposite the side on which the first cutting edge is arranged. This ensures a consistent and good quality of cut.
  • At least one cutting edge of the first cutting edge and at least one cutting edge of the second cutting edge lie in a common plane in at least one operating mode, whereby the cut of the yarn can be carried out correctly and with ⁇ m accuracy.
  • a high power development for cutting the yarn can be achieved if, in at least one operating mode, the first cutting edge and the second cutting edge are biased against each other are.
  • the operating mode preferably represents a cutting operation.
  • At least one cutting edge of the first cutting edge and at least one cutting edge of the second cutting edge have a tilt relative to one another, which is intended to set a force component between the cutting edges during a cutting operation by means of the cutting edges.
  • By tilting an optimal and at the same time gentle cutting result can be achieved. It is achieved a stepless change in force in a movement along the cutting edges in the cutting process, through which the fiber is handled without damage during a threading process.
  • vibrations of the cutting edges, caused by a meeting of the cutting edges in the cutting process can be reduced.
  • an insertion bevel may be provided, which is arranged in at least one region of a cutting edge and lies on one side, which faces the other cutting edge.
  • At least one cutting edge has a formation which is provided to set a force component between the cutting edges during a cutting operation by means of the cutting edges.
  • This formation is intended in particular a curvature formed in the longitudinal direction of the cutting edge be, which causes the same effect and the same advantages as the tilt.
  • first cutting edge and the second cutting edge are intended to perform a cutting of the yarn according to a scissor-type principle.
  • scissors principle is to be understood here that the two cutting edges touch directly in front of the cut in a cutting point, which moves in a process of cutting and thus in a sliding past the cutting edges along the longitudinal extension of the cutting edges. This allows a precise and straight cut of the fibers. Thus, tough fibers can be cut.
  • the two cutting work on the principle of a cutting shear, whereby a large power development can be ensured for cutting the yarn.
  • an adjusting device for adjusting at least one cutting edge is provided.
  • both blades can be matched exactly.
  • the cutting edges must be aligned exactly 1 ⁇ m.
  • the adjustment device has a partial region provided for elastic deformation, whereby a fine adjustment of a cutting arrangement can be achieved in a structurally simple manner.
  • a collecting device for the staple fibers is provided, wherein the collecting device has a box and a shaft opening into the box.
  • the box can also by another, the skilled person useful as catcher, such as a shaft, to be replaced.
  • This embodiment makes it possible for the cut or severed fibers to pass directly into the resulting fleece or fiber bed without impurities.
  • the shaft surround the cutting edges. Hereby, flying away of the cut fibers is effectively prevented, whereby the shaft acts as a nozzle.
  • the collecting device has an extraction device in order to accelerate the formation of a nonwoven or fiber bed and to optimize it overall.
  • the collecting device has a separating device which separates the blown and cut fibers from the air.
  • a preferred development is that a device is provided which has a plurality of rotor nozzle converter. As a result, a high throughput rate of cut staple fibers can advantageously be achieved.
  • An inexpensive device can be advantageously achieved if a drive is provided which at least partially drives the rotor nozzle converter.
  • the drive is a belt drive with a belt, which has a double-sided toothing.
  • This can constructively simple and inexpensive synchronously working Device are designed.
  • the belt can be designed as a wedge, flat or round belt, as a chain and / or particularly advantageous as a toothed belt. But it is also another conceivable to those skilled in the art as Umschlingungsantrieb conceivable.
  • the FIGS. 1 to 3 show a rotor nozzle converter 10 for converting a yarn 12 into staple fibers. It can be mixed both several yarn or fiber strands and different yarn or fiber types.
  • the rotor nozzle converter 10 comprises a rotor nozzle 14, 16, which has a rotor 14.
  • the rotor 14 is rotatably mounted in at least one bearing 50 and can be set in rotation by a drive 52. In the present embodiment, it is preferably a belt drive, wherein in the FIGS. 2 and 3 only the belt guide 52 is shown. However, it can also be any further drive that appears appropriate to a person skilled in the art.
  • the rotor 14 has a channel 54 for the passage of the yarn 12.
  • a feed tube 86 is provided for the yarn 12, which is stationary, that is not co-rotated with the rotor 14.
  • the yarn 12 is according to Fig. 3 deflected in the rotor 14 by an angle of less than 90 °.
  • the nozzle function is integrated, wherein a nozzle unit 16 is used to fulfill the nozzle function.
  • the nozzle unit 16 is arranged in the channel 54 of the rotor 14.
  • the nozzle unit 16 is preferably supplied with compressed air via a sealed circulation gap 56. Cooling can be achieved via the air flow and / or the moisture in the converter 10 and thus the cutting properties of the yarn 12 can be regulated.
  • a cutting edge 18 is mounted fixedly in front of the rotor 14 or in front of an end face 26 of the rotor via a holder 58 described in greater detail below.
  • a second cutting edge 20 is provided which acts as a counter-cutting edge to the first cutting edge 18.
  • the second cutting edge 20 is rotatably mounted.
  • the cutting edge 20 is fastened to the rotor 14 and rotates in the direction of rotation 90 with the rotor 14.
  • the second cutting edge 20 on another component is rotatably mounted.
  • the cutting edges 18, 20 are preferably made of steel, hard metal, ceramic or a hybrid material of, for example, any mixture of the aforementioned materials.
  • the cutters 18, 20 can additionally have a coating, for example of a carbon compound, such as diamond.
  • the use of a laser, in particular a diode laser, as a cutting edge is conceivable.
  • the second cutting edge 20 is arranged above an outlet opening 22 of the yarn 12 which is located in the front side 26, wherein the outlet opening 22 can have an arbitrary distance to the axis of rotation of the rotor.
  • the first fixed cutting edge 18 is arranged in front of the rotor 14 in such a way that after each full rotation of the rotor 14, the cutting edges 18, 20 are aligned at a distance which is precisely adjusted with respect to the ⁇ m.
  • the fed with uniform and / or stepped speed, which is also variable via a step program, supplied yarn 12 is inserted through the nozzle unit 16 in the channel 54 of the rotor 14.
  • the yarn 12 is passed in the channel 54 to the outlet opening 22 and the open yarn end is expelled from the outlet opening 22.
  • the co-rotating second cutting edge 20 passes through the stationary first cutting edge 18, the yarn 12, during rotation, being drawn between the cutting edges 18, 20 and being cut.
  • the two cutting edges 18, 20 function like a pair of scissors, in particular like a pair of cutting shears. By the rotation of the second cutting edge 20, the two cutting edges 18, 20 must always meet again. In order to allow a cut of the yarn 12, the cutting edges 18, 20 are arranged in two different planes, which run parallel to each other. As a limiting case, it would also be possible for the cutting edges 18, 20 to be arranged in the same plane.
  • the cutting edges 60, 62 of the cutters 18, 20 acting as scissors lie in one plane at the time of the meeting and the execution of the cut.
  • the cutting edges 18, 20 or the cutting edges 60, 62 at the time of the cut only ever a point of contact with each other, in the process of cutting and thus in a sliding along the cutting edges 18, 20 along the longitudinal extent of the cutting edges 60, 62nd emotional.
  • an adjusting means 92 for the cutting 18, 20 is provided, wherein the adjusting means 92 for aligning the cutting edges 18, 20 is used. It is arranged, for example, on the holder 58 of the second cutting edge 18. By means of the adjusting means 92, for example, a tilting and / or a bias of the blades 18, 20 can be adjusted.
  • the adjusting means 92 for example, a tilting and / or a bias of the blades 18, 20 can be adjusted.
  • FIG. 7 is a schematic representation of the tilting exemplified, based on the second cutting edge 20 shown.
  • the cutting edges 18, 20 are adjusted so that both cutting edges 18, 20 are in each case by the longitudinal extent of their cutting edges 60, 62 extending axis 98 are rotated with the same direction of rotation.
  • large-area contact of the cutting surfaces in the longitudinal extension of the cutting edges 18, 20 is prevented and the cutting edges 60, 62 only touch one another at a point which moves along the cutting edges 60, 62 in the cutting process.
  • at least one cutting edge 20 is tilted in a further axis 100 with a tilting 94.
  • the cutting edge 20 can be rotated in a center 102 on its support surface.
  • a bias voltage is provided which increases the tension between the blades 18, 20 and thus improves the quality of cut.
  • a formation 96 in the form of a curvature can also be provided on at least one cutting edge 20.
  • Fig. 4 1 shows an adjustment device 24 in which the rotor 14 of the rotor nozzle 14, 16 is at least partially surrounded by a stationary component 64, which receives the holder 58 for the first cutting edge 18.
  • the holder 58 has a connecting element 66, to which the first cutting edge 18 is fastened by means of an adjusting element 70, which is displaceable essentially in the direction of a transverse axis 68.
  • the connecting element 66 has a slope or slope 72 extending from the adjusting element 70 to the cutting edge 18 of less than 4 °, preferably 2 °.
  • a spring element preferably a plate spring 76 or a package of disc springs 76, provided, which, together with a recess 74 provided on the recess 78, which reduces a partial region 88 of a connecting element to a third of its width to approximately 11 mm, permits an elastic partial deformation of the connecting element 66.
  • a coarse adjustment of the cutters 18, 20 can be achieved.
  • a displacement of 3 mm corresponds approximately to a change in a gap 80 between the cutting edges 60, 62 in its horizontal extent of 100 ⁇ m.
  • the adjusting element 70 is fixed.
  • the plate spring 76 is used, whereby a cutting gap can be set to a fiber thickness of a fiber strand.
  • the gap 80 adapted in its vertical extent. In this case, for example, the gap 80 can be changed by 1 micron, when the spring 76 is adjusted by 15 °.
  • the fibers should be used for the direct production of a nonwoven or a fiber bed.
  • the cut or severed fibers should fall directly onto the resulting web or fiber bed.
  • the strength of the supplied compressed air flow has an effect on the fall or the storage of the fibers.
  • a collecting device 28 according to Fig. 5 provided, which comprises a box 30 and opening into the box 30 shaft 32, wherein the Box 30 and the shaft 32 can be made in one piece.
  • the shaft 32 surrounds the blades 18, 20 and thus prevents blowing away of the cut fibers.
  • the collecting device 28 has an extraction device 34.
  • the cut fibers are heavier than air and automatically fall down. If this automatism is disturbed, the suction device 34 may intervene by, for example, applying a vacuum.
  • a separator is provided in the form of at least one baffle 36 which separates air and fibers from each other.
  • Fig. 6 is also a device with a plurality of Rotordüsekonvertern 10 conceivable, in which case only one rotor nozzle converter per row is provided with a reference numeral.
  • the rotary nozzle converters 10 may rotate in opposite directions 82, 84 so that untwisting of a "twisted" fiber strand is possible.
  • the device preferably has a common drive 38, which drives one part or all of the rotor nozzle converters 10.
  • the Rotordüsekonverter 10 for example, according to Fig.
  • the Rotordüsekonverter 10 serves not only to convert the continuous yarns in staple fibers, but also for dosing the amount of fiber per unit time and / or the desired length of the fiber pieces.
  • the length adjustment is adjustable via the feed rate of the yarn 12 and / or the rotational speed of the rotor 14, wherein a continuous metering is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP07723883A 2006-08-29 2007-04-02 Rotordüsekonverter Not-in-force EP2057309B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11003356.0A EP2351880B1 (de) 2006-08-29 2007-04-02 Konverter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006040285 2006-08-29
PCT/EP2007/002942 WO2008025382A1 (de) 2006-08-29 2007-04-02 Rotordüsekonverter

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP11003356.0A Division-Into EP2351880B1 (de) 2006-08-29 2007-04-02 Konverter

Publications (2)

Publication Number Publication Date
EP2057309A1 EP2057309A1 (de) 2009-05-13
EP2057309B1 true EP2057309B1 (de) 2012-10-10

Family

ID=38541969

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07723883A Not-in-force EP2057309B1 (de) 2006-08-29 2007-04-02 Rotordüsekonverter
EP11003356.0A Not-in-force EP2351880B1 (de) 2006-08-29 2007-04-02 Konverter

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11003356.0A Not-in-force EP2351880B1 (de) 2006-08-29 2007-04-02 Konverter

Country Status (4)

Country Link
EP (2) EP2057309B1 (es)
DE (1) DE202007019280U1 (es)
ES (1) ES2401637T3 (es)
WO (1) WO2008025382A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9308659B2 (en) 2010-09-16 2016-04-12 Schmidt & Heinzmann Gmbh & Co. Kg Fiber cutting device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2727694B1 (de) 2012-11-05 2015-01-28 Toho Tenax Europe GmbH Ablegevorrichtung zum gesteuerten Ablegen von Verstärkungsfaserbündeln
PL2727693T3 (pl) 2012-11-05 2015-05-29 Toho Tenax Europe Gmbh Sposób wytwarzania tabletek z włókien

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE674105C (de) * 1935-07-07 1939-04-05 Emil Blaschke Vorrichtung zum Schneiden endloser kuenstlicher Faserbaender
US2173789A (en) * 1935-12-05 1939-09-19 Nikles Paul Method of producing stapled fibers
GB641262A (en) * 1946-09-07 1950-08-09 American Viscose Corp Improvements in and relating to devices for stapling continuous fiber
US2607418A (en) * 1951-04-10 1952-08-19 Du Pont Staple cutter
US3119294A (en) * 1960-09-01 1964-01-28 Du Pont Cutting apparatus with adjustable blade means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9308659B2 (en) 2010-09-16 2016-04-12 Schmidt & Heinzmann Gmbh & Co. Kg Fiber cutting device

Also Published As

Publication number Publication date
EP2351880A2 (de) 2011-08-03
ES2401637T3 (es) 2013-04-23
EP2351880B1 (de) 2013-07-03
WO2008025382A1 (de) 2008-03-06
DE202007019280U1 (de) 2011-11-28
EP2057309A1 (de) 2009-05-13
EP2351880A3 (de) 2012-04-18

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