WO2023174588A1 - Machine de cardage - Google Patents

Machine de cardage Download PDF

Info

Publication number
WO2023174588A1
WO2023174588A1 PCT/EP2023/050176 EP2023050176W WO2023174588A1 WO 2023174588 A1 WO2023174588 A1 WO 2023174588A1 EP 2023050176 W EP2023050176 W EP 2023050176W WO 2023174588 A1 WO2023174588 A1 WO 2023174588A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
carding
flat
card
card according
Prior art date
Application number
PCT/EP2023/050176
Other languages
German (de)
English (en)
Inventor
Thomas Schmitz
Wilfried GOTHMANNS
Robert BERNS
Urs HEGGEN
Robert Pischel
Original Assignee
Trützschler Group SE
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
Priority claimed from DE102022108808.1A external-priority patent/DE102022108808A1/de
Application filed by Trützschler Group SE filed Critical Trützschler Group SE
Publication of WO2023174588A1 publication Critical patent/WO2023174588A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/16—Main cylinders; Breasts
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/24—Flats or like members

Definitions

  • the present invention relates to a card with an inlet side for fiber flakes, the card being designed to feed the fiber flakes to a rotating drum by means of at least one licker-in.
  • the fiber flakes are broken up, aligned and cleaned down to the individual fibers between fixed carding elements and rotating flat bars.
  • the resulting fibrous web is transferred from the drum to a recipient, which is followed by a device for converting the fibrous web into a sliver.
  • revolving flat cards which essentially have a large main cylinder, the drum or the reel, on which carding of fibers takes place by a certain number of revolving flats and fixed carding elements.
  • the work organ that supplies the material is the licker-in and the work organ that removes the material is the buyer.
  • the carding length and in particular the number of engaged circumferential flat bars of the revolving flat has a significant influence on the carding quality.
  • the carding area and the speed of the drum are crucial for the productivity of the card. It is possible to increase the drum speed, although very high centrifugal forces occur here, which lead to a convex deformation of the drum.
  • the common method is to move the licker-in and/or doffer further under the drum. The usable circumferential length is thus increased in order to be able to accommodate a desired number of additional revolving lids.
  • the drum must be positioned very high in the machine, at least high enough to be above the doffer.
  • the running stability and vibration stiffness become worse the higher the heavy and high-speed drum is positioned at approx. 600 rpm.
  • the supporting frame construction must be appropriately large and strong and must not be too slim.
  • EP 3162927 A1 discloses a card with a carding length of greater than 3000mm, with the drum diameter being between 1150mm and 1250mm.
  • the increased carding length is achieved by moving the licker-in and doffer under the drum.
  • the drum speed is given as a range of 500 to 600 revolutions per minute.
  • the number of solid carding elements and flat bars used in the carding process can thus be increased.
  • the disadvantage is the increased height.
  • EP 2527505 discloses a revolving flat card, which proposes a certain geometric arrangement of licker-in and doffer to achieve high productivity.
  • the entire geometry is based on a horizontal orientation of the card.
  • the disadvantage of the device is that the arrangement of the licker-in and doffer results in a large overall height of the card and a possible transport path on the drum is not used.
  • the diameter of the drum is up to 1200mm.
  • Document IN351271 B also describes a “superposed” card that has a drum diameter of up to 1100mm and in which at least 36 rotating flat bars are always in engagement. This document clearly points out the relationships between drum size, thermal expansion and centrifugal forces at constant speed, so that from a drum diameter of 1287mm there are more disadvantages than advantages.
  • the invention is based on the object of developing a card in such a way that the carding length is increased without the aforementioned disadvantages occurring.
  • the invention solves the problem set by a system with the features specified in claim 1.
  • Advantageous developments of the invention are defined in the dependent claims.
  • the invention relates to a card with an inlet side for fiber flakes, the card being designed to feed the fiber flakes to a rotating drum by means of at least one licker-in. On the drum, the fiber flakes are broken up, aligned and cleaned down to the individual fibers between fixed carding elements and rotating flat bars. The resulting fibrous web is transferred from the drum to a recipient, which is followed by a device for converting the fibrous web into a sliver.
  • the invention includes the technical teaching that the diameter of the drum is at least 1300mm and the difference in distance between the front and rear heel of a flat set of a flat bar over a width of 20mm to the set of the drum is less than 12/1000" [inch], i.e 0.30mm. Due to the increased radius of curvature, which brings the carding surface between the flat bar and the drum closer to the ideal state of a straight carding surface, the carding gap becomes more constant across the width of the flat bar. This difference in distance can also arise with a narrower or wider carding for example, 25mm or 30mm wide. The distance difference is determined over a measured distance of 20mm wide, even if the clothing has a smaller or larger width. The carding intensity increases, regardless of the length of the carding surface.
  • the carding gap is over the width of the flat bar due to the increased radius of curvature of the drum, whereby the carding surface between the flat bar and the drum comes closer to the ideal state of a straight carding surface more constant.
  • the gap difference between the rear and front heel of the clothing of a flat bar can be reduced by at least 4/1000" (0.1mm) compared to the prior art, thereby increasing carding performance and carding quality without a higher power must be installed.
  • the card can be operated with a reduced drive power, since when the diameter is increased, the drum mass can be accelerated to a lower speed and operated at this than in the prior art.
  • Another advantage lies in the larger surface of the drum, which can therefore dissipate more heat and deforms less when heated.
  • the essential dimensions of the card are determined by varying the drum diameter in conjunction with the carding length.
  • the carding length which is determined by a partial circumference of the drum between the contact point of licker-in and drum and the contact point between drum and doffer, can be at least 3170mm.
  • This increases the carding intensity without the licker-in and the Doffers have to be moved under the drum, which makes the card unstable in running behavior and allows it to be larger.
  • the disadvantages of the prior art namely the vibration associated with the increased overall height, are compensated for by the arrangement of the licker-in and the doffer. Since these rollers are arranged in almost the same circumferential angle range as in the applicant's previous card, neither vibrations and thus unsteady running occur, nor is the overall height of the card significantly increased.
  • drum diameter is increased with approximately the same carding length, a more favorable arrangement of licker-in and doffer results, which means that the card height only increases slightly. At the same time, the gap difference between the flat bar clothing and the drum clothing is reduced.
  • the gap difference on the flat bar clothing can be further reduced.
  • the difference in distance between the front and rear heel of a flat flat bar set over a width of 20mm to the drum set is then a maximum of 11/1000" [inch], i.e. 0.28 mm.
  • This difference in distance can also be the case with a wider or narrower one Set that has, for example, 25mm or 30mm width.
  • the distance difference is determined over a measured distance with a width of 20mm, even if the set has a smaller or larger width.
  • Another independent claim is based on a card with an inlet side for fiber flakes, the card being designed to feed the fiber flakes to a rotating drum by means of at least one licker-in.
  • the fiber flakes are broken down, aligned and cleaned between the fixed carding elements and rotating flat bars and the drum down to the individual fibers.
  • the resulting fibrous web is transferred from the drum to a recipient, which is followed by a device for converting the fibrous web into a sliver.
  • the invention provides that the diameter of the drum is at least 1300mm and that the carding length, which is determined by a partial circumference of the drum between the contact point of licker-in and drum and the contact point between drum and doffer, is at least 3170mm.
  • the carding length which is determined by a partial circumference of the drum between the contact point of licker-in and drum and the contact point between drum and doffer will be enlarged.
  • This increases the carding intensity without having to move the licker-in and the doffer under the drum, which makes the card unstable in its running behavior and allows it to be larger.
  • the disadvantages of the prior art namely the vibration associated with the increased overall height, are compensated for by the arrangement of the licker-in and the doffer. Since these rollers are arranged in almost the same circumferential angle range as in the applicant's previous card, neither vibrations and thus unsteady running occur, nor is the overall height of the card significantly increased.
  • a further improvement can be achieved in that the distance difference between a front and a rear heel of a flat set of a flat bar over a width of 20mm to the set of the drum is less than 12/1000" [inch] (0.30mm). Due to the enlarged Radius of curvature of the drum, which means that the carding surface between the flat bar and the drum comes closer to the ideal state of a straight carding surface, the carding gap becomes more constant over the width of the flat bar. This difference in distance can also arise with a narrower or wider clothing, for example 25mm or 30mm wide . The distance difference is determined over a measured distance with a width of 20mm, even if the clothing has a smaller or larger width. The carding intensity increases, regardless of the length of the carding surface.
  • the carding intensity can be further increased by increasing the size of the drum to a diameter of at least 1400mm, so that with the same arrangement of licker-in and doffer the carding length is at least 3190mm.
  • the carding intensity is further increased.
  • This difference in distance can also be a wider or narrower set, for example 25mm or 30mm wide. The distance difference is determined over a measured distance with a width of 20mm, even if the set has a smaller or larger width.
  • the circumferential angle formed by the carding length between the contact point of licker-in and drum and the contact point between drum and doffer is a maximum of 280°, preferably a maximum of 270°. Since, according to the invention, the increased carding length is created by increasing the drum diameter, the limited circumferential angle ensures a low overall height of the card, since the licker-in and doffer interact with the drum almost at the previous position.
  • the height between the underside of the frame and the axis of the drum is a maximum of 1230mm. This means that the previous concept of the frame with storage can be continued to be used with only small adjustments.
  • the thermal load has a smaller effect on the change in the carding gap than in the prior art.
  • the centrifugal force can be reduced because the drum can be operated at a lower speed with the same productivity.
  • the card is designed to operate the drum at a maximum peripheral speed of 2450 m/min, whereby the drive power can be reduced and at the same time the centrifugal force is limited.
  • the pre-carding area increases, which can accommodate an additional cleaning element of a suction hood with or without a knife, or an additional fixed carding element.
  • the circumferential angle of the pre-carding area is reduced by increasing the size of the revolving cover, the larger drum diameter increases the circular arc of the pre-carding area to at least 900mm on the circumference of the drum. This means that the flat circuit of the revolving flat can be additionally relieved, which increases the service life of the flat bar sets and improves the carding quality.
  • the pre-carding area increases in a circular arc to at least 900mm, with the circular arc in the pre-carding area being determined from the center of the licker-in that engages the drum to the center of the deflection roller of the revolving cover. This allows the elements of the Pre-carding area can be enlarged along the angular circumference or an additional cleaning or fixed carding element can be used.
  • Figure 1 a side view of a schematically shown card according to the
  • FIGS. 2a - 2c further schematically illustrated cards according to the prior art
  • FIG. 2d a card of the invention shown schematically
  • Figure 3 an enlarged view of a flat bar with the curvature of a
  • Figure 4 an enlarged view of the pre-carding zone
  • Figure 4a an enlarged detailed view in the area of the licker-in.
  • Fig. 1 shows a card according to the prior art, in which fiber flakes are guided via a shaft to a feed roller 1, a feed table 2, via several licker-ins 3a, 3b, 3c, to the drum 4 or the reel.
  • the fibers of the fiber flakes are parallelized and cleaned using fixed and rotating carding elements.
  • the resulting fibrous web is subsequently conveyed via a pickup 5, a stripping roller 6 and several squeezing rollers 8, 9 to a fleece guiding element 10, which forms the fibrous web with a funnel 11 into a sliver that is fed via take-off rollers 12, 13 to a subsequent processing machine or a Pot 15 hands over.
  • the removal of the fibers from the customer 5 is supported by a fleece guide profile 7, which is arranged below the stripping roller 6.
  • a cleaning roller 6a Above the stripping roller 6 there is a cleaning roller 6a, with which fiber residues are removed from the stripping roller 6 and fed to a suction device (not further specified).
  • FIG. 2a shows a schematic representation of the applicant's card, which is sold under the product name TC19.
  • the card has a drum diameter (without clothing) of 1287mm with a working width of 1280mm.
  • the revolving lid 16 has a total of 84 flat bars 17, of which 28 flat bars are constantly in engagement with the clothing of the drum 4.
  • the carding length KL is composed of the pre-carding area VK, the main carding area HK and the post-carding area NK.
  • the pre-carding area VK is determined by the angular circumference on the drum 4 between the center of the licker-in 3c and the center of the first deflection roller 16a of the revolving cover.
  • the main carding area HK corresponds to the cover circumferential surface of the rotating covers 16 with the rotating covers 17 on the drum 4, which is determined by the angular circumference between the center of the deflection rollers 16a and 16b on the drum circumference.
  • the angular circumference of the re-carding area NK extends from the center of the deflection roller 16b to the center of the doffer 5 on the drum circumference.
  • Figure 2b shows a schematic card geometry of a card according to the prior art, which has a smaller drum diameter of 1180mm with a working width of 1500mm.
  • the rotating lid 16 has a total of 116 flat bars 17, of which 40 flat bars are constantly in engagement with the clothing of the drum 4.
  • FIG. 2c Another card geometry according to the prior art is shown in Figure 2c, which has a diameter of the drum 4 of 1017mm with a working width of 1500mm.
  • the revolving lid has a total of 101 flat bars, of which 36 flat bars are constantly in engagement with the clothing of the drum 4.
  • This embodiment is described in document IN351271 B.
  • the invention avoids the previous disadvantages by using a card with a drum diameter of at least 1300mm, preferably at least 1350mm, with a constant working width of 1280mm.
  • Figure 2d shows a schematic embodiment of the card according to the invention with a drum diameter of 1400mm.
  • the carding length KL is 3190mm, which corresponds to an active circumferential angle between the center of licker-in 3c to the center of doffer 5 of 261°.
  • the rotating lid 16 has a total of 105 flat bars 17, of which 38 flat bars are constantly in engagement with the clothing of the drum 4.
  • the engaged flat bars 17 are distributed symmetrically over the center line arranged perpendicular to the drum axis, so that the carding heat is also dissipated symmetrically over the drum circumference.
  • the increase in the carding length KL is achieved by increasing the drum diameter, whereby the arrangement of the licker-in 3c and the doffer remains almost unchanged.
  • the frame 18 can maintain its wide support structure without restricting the installation space of the licker-in 3c and the doffer 5. This means that with this drum diameter of at least 1300mm, the height H of a maximum of 1230mm can be maintained from the underside of the frame to the drum axis.
  • Another significant advantage is the increased radius of curvature, whereby the carding surface between flat bar 17 and drum 4 comes closer to the ideal state of a straight carding surface.
  • the carding gap across the width of the flat bar 17 becomes more constant.
  • Figure 3 shows an enlarged view of a flat bar 17 with a set 17a, which is set at its rear heel Fh to a distance of 3/1000" [inch], i.e. 0.076 mm distance from the set of the drum 4, not shown.
  • all flat bars 17 have a uniform, flat dimension of 20 mm across the width of the clothing 17a.
  • the curvature of the drum 4 results in a dimension X at the front heel Fv of the clothing 17a, which varies with the curvature of the drum 4.
  • the first value according to the prior art shows the example of a card known on the market with a drum diameter of 800mm with a gap X of 23/1000" [inch], i.e. 0.7mm.
  • the dimension 1400mm to even 14/1000"[inch] (0.356mm).
  • the dimension X can also be with a narrower or wider set, for example 25mm or 30mm wide.
  • the dimension X results over a measured distance of 20mm in width, even if the set has a smaller or larger width.
  • Increasing the drum diameter at the same speed can increase the peripheral speed to such an extent that the carding quality decreases for some but not all fiber qualities.
  • the drum speed is therefore limited so that a peripheral speed of 2450 m/min is not exceeded.
  • the measures according to the invention achieve improved carding quality and the known negative side effects caused by the high drum speed and the associated high temperature difference are reduced. As a result, the carding and the associated yarn quality improves. This means raw material costs can be saved or productivity can be increased. Alternatively, the carding intensity can be reduced and the possible quality gain can be converted into energy savings.
  • the cleaning elements such as suction hoods 23, 27, fixed carding elements 24, gusset profiles 26, cover elements 25 or other cleaning elements are arranged on the flexible sheet 21.
  • the pre-carding area in the angled arc on the drum circumference can be enlarged with the same arrangement of the licker-in and at the same time symmetrical arrangement of the enlarged revolving cover 16.
  • the angular arc of the pre-carding area VK thus increases and can provide an additional cleaning element a suction hood 27 with or without a knife, or an additional fixed carding element 24. This additionally relieves the load on the flat circuit of the revolving flat 16, which increases the service life of the flat bar sets 17 and improves the carding quality.
  • the pre-carding area increases to at least 900mm in an angular arc on the drum circumference, the angular arc in the pre-carding area VK being determined from the center of the licker-in 3c acting on the drum 4 to the center of the deflection roller 16a of the revolving cover 16.
  • the elements of the pre-carding area can be enlarged along the angular circumference or an additional cleaning or fixed carding element can be used.
  • the additional element has not yet been mounted, but a simple cover element 25 has been inserted there.
  • the cover element 25 has been replaced by a fixed carding element 24, with which additional carding is carried out.
  • a suction hood with or without a knife or another cleaning element can also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

L'invention se rapporte à une machine de cardage dotée d'un côté admission pour des touffes de fibres, la machine de cardage étant conçue pour amener les touffes de fibres vers un tambour rotatif (4) au moyen d'au moins un dispositif d'admission (3a, 3b, 3c), les touffes de fibres étant fractionnées jusqu'à la fibre individuelle, orientées et nettoyées entre des éléments de cardage fixes et des barres de cardage en circulation (17) et le tambour (4), et la bande fibreuse résultante pouvant être transférée depuis le tambour (4) sur un peigneur (5), en aval duquel est disposé un dispositif permettant de convertir la bande fibreuse en un ruban. L'invention est caractérisée en ce que le diamètre du tambour (4) est d'au moins 1 300 mm et la différence de distance entre le talon avant et arrière (Fv-Fh) d'une garniture de chapeau de 20 mm de large (17a) d'une barre de cardage (17) et la garniture du tambour (4) est inférieure à 12/1000 de pouce.
PCT/EP2023/050176 2022-03-16 2023-01-05 Machine de cardage WO2023174588A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102022106202 2022-03-16
DE102022106202.3 2022-03-16
DE102022108808.1A DE102022108808A1 (de) 2022-03-16 2022-04-12 Karde
DE102022108808.1 2022-04-12

Publications (1)

Publication Number Publication Date
WO2023174588A1 true WO2023174588A1 (fr) 2023-09-21

Family

ID=84982130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/050176 WO2023174588A1 (fr) 2022-03-16 2023-01-05 Machine de cardage

Country Status (1)

Country Link
WO (1) WO2023174588A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0894876A1 (fr) * 1997-07-31 1999-02-03 Maschinenfabrik Rieter Ag Rouleaux d'une machine de cardage
EP0905293A1 (fr) * 1997-09-12 1999-03-31 Maschinenfabrik Rieter Ag Chapeau de machine de cardage
EP2527505A1 (fr) 2011-05-20 2012-11-28 Marzoli S.P.A. Machine de cardage de chaîne de filature de fil
EP3162927A1 (fr) 2015-10-27 2017-05-03 Maschinenfabrik Rieter Ag Cardeuse à chapeaux tournants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0894876A1 (fr) * 1997-07-31 1999-02-03 Maschinenfabrik Rieter Ag Rouleaux d'une machine de cardage
EP0905293A1 (fr) * 1997-09-12 1999-03-31 Maschinenfabrik Rieter Ag Chapeau de machine de cardage
EP2527505A1 (fr) 2011-05-20 2012-11-28 Marzoli S.P.A. Machine de cardage de chaîne de filature de fil
EP3162927A1 (fr) 2015-10-27 2017-05-03 Maschinenfabrik Rieter Ag Cardeuse à chapeaux tournants

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