WO2023067543A1 - Chapeau pour machine de cardage - Google Patents

Chapeau pour machine de cardage Download PDF

Info

Publication number
WO2023067543A1
WO2023067543A1 PCT/IB2022/060093 IB2022060093W WO2023067543A1 WO 2023067543 A1 WO2023067543 A1 WO 2023067543A1 IB 2022060093 W IB2022060093 W IB 2022060093W WO 2023067543 A1 WO2023067543 A1 WO 2023067543A1
Authority
WO
WIPO (PCT)
Prior art keywords
airflow
flat top
card clothing
flat
wire
Prior art date
Application number
PCT/IB2022/060093
Other languages
English (en)
Inventor
Ashok Kumar Pal
Mehul Kunjbihari Trivedi
Original Assignee
The Indian Card Clothing Company Limited
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 The Indian Card Clothing Company Limited filed Critical The Indian Card Clothing Company Limited
Publication of WO2023067543A1 publication Critical patent/WO2023067543A1/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
    • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
    • D01G15/86—Card clothing; Manufacture thereof not otherwise provided for with flexible non-metallic backing

Definitions

  • the present invention relates to flat tops of carding machines.
  • the main process of separating individual fibres takes place between the wire points of the cylinder and the wire points of the flat tops.
  • a metallic card clothing is mounted on the main cylinder, while the tops are mounted on flat bars which are fitted on a revolving chain.
  • Fibre tufts are fed into the carding machine through a licker-in 1 , and transferred to the cylinder configured to rotate at a high speed, which may go up to 600 RPM, to induce the carding effect.
  • the high speed of the cylinder creates a huge air current around it.
  • the cylinder wire points carry the tufts, and pass it through the flat bar wire points, to clean the fibres of impurities. The cleaned cotton is then carried by the cylinder wire points and taken out by doffer of the carding machine.
  • the effectiveness of the carding process depends on the positioning of the wire points on the tops. To produce an even carding effect, it is imperative that the flat wire points are evenly distributed on the tops. It is also important that the setting design of the wire point in the tops should be such that the tops remain relatively clean during its working for a longer time. Usually, the impurities on the flat tops are cleared away by the air current passing therethrough. The passage of the air is facilitated by the passages defined in between the wire points of the cylinder and the wire points of the flat tops.
  • An object of the present disclosure is to provide a flat top for a carding machine.
  • Another object of the present disclosure is to provide a flat top for a carding machine which provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation.
  • Yet another object of the present disclosure is to provide a flat top for a carding machine which improves the carding efficiency, thereby improving the quality of the fibre output.
  • the present disclosure envisages a flat top for the carding machine.
  • the flat top comprises a flat bar and a card clothing affixed over the flat bar.
  • the card clothing comprises a card clothing foundation and a plurality of arrays of wire staples provided on the card clothing foundation to define a plurality of first airflow channels between the wire staples.
  • Each array is defined by a plurality of wire staples offset to each other by a predetermined distance to define a plurality of second airflow channels therebetween.
  • Each second airflow channel comprises a plurality of airflow lanes.
  • the first airflow channels are parallel to an operative vertical axis.
  • the wire staple has a U-shaped configuration defined by a crown and a pair of legs having pointed ends.
  • the pair of legs is configured to extend from the crown.
  • each wire staple is configured to be punched through the card clothing foundation such that the legs of the wire staple protrude out through the operative surface of the card clothing foundation to facilitate the carding action of fibre-tufts.
  • the wire staple has a cross-sectional configuration selected from the group consisting of round, elliptical, ovoid, rectangular or triangular.
  • the wire take-up distance defined between the staples is configured to incrementally reduce from the first staple row to the last row.
  • the staple rows are configured to be angularly disposed with respect to the vertical axis initially by a first predetermined acute angle, then by a second predetermined obtuse angle, and thereafter by a third predetermined acute angle.
  • the staple rows are configured to be angularly disposed with respect to the vertical axis initially by the first predetermined angle ranging from 60° to 70°, then by the second predetermined angle ranging from 95°-99°, and thereafter by the third predetermined angle ranging from 75°-79° to define the plurality of airflow lanes.
  • the width of the first airflow channel ranges from 0.1mm to 1mm.
  • the width of the second airflow lanes ranges from 1mm to 2mm.
  • the staple rows are configured to be angularly disposed with respect to the vertical axis initially by the first predetermined angle ranging from 60° to 65°, then by the second predetermined angle ranging from 31°-35°, and thereafter by the third predetermined angle ranging from 95°-99° to define a first airflow lane, a second airflow lane, a third airflow lane and a fourth airflow lane.
  • the width of the first airflow channel ranges from 0.1mm to 1mm.
  • the width of the first airflow lane ranges from 1mm to 2mm.
  • the width of the second airflow lane ranges from 1mm to 2.5mm.
  • the width of the third airflow lane ranges from 1mm to 2mm. In yet another embodiment, the width of the fourth airflow lane ranges from 2mm to 3mm.
  • the present disclosure further envisages a carding machine comprising a rotating cylinder, a liker-in configured to be in communication with the cylinder, and configured to rotate in a direction opposite to the direction of rotation of the cylinder, a doffer configured to be in communication with the cylinder, and is configured to rotate in a direction opposite to the direction of rotation of the cylinder.
  • the machine further comprises a conveyor configured to revolvingly abut the cylinder.
  • the conveyor has a plurality of flat tops mounted thereon to enable carding of fibre-tufts fed between the flat tops and the cylinder to produce fibre webs.
  • Each flat top comprises a flat bar and a card clothing affixed over the flat bar.
  • the card clothing comprises a card clothing foundation, and a plurality of arrays of wire staples provided on the card clothing foundation defining a plurality of first airflow channels between the wire staples.
  • Each array is defined by a plurality of wire staples offset to each other by a predetermined distance to define a plurality of second airflow channels therebetween.
  • Each second airflow channel comprises a plurality of airflow lanes.
  • Figure 1 illustrates a schematic view of the carding machine, in accordance with an aspect of the present disclosure
  • Figure 2 A illustrates a cross sectional view of the card clothing of a flat top of the machine
  • Figure 2B illustrates a leg of a wire staple punched onto the top
  • Figure 3 A and Figure 3B illustrates a schematic view of the first embodiment of staple rows
  • Figure 4A and Figure 4B illustrates a schematic view of the second embodiment of staple rows.
  • Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
  • a carding machine 100 (hereinafter referred to as ‘the machine 100’), as illustrated in Figure 1, includes a rotating cylinder 1 configured to be in communication with a liker-in 2 and a doffer 4.
  • the liker-in 2 and the doffer 4 are configured to rotate in a direction opposite to the direction of rotation of the cylinder 1.
  • the machine 100 further includes a conveyor 3, having a plurality of flat tops 3 a, configured to revolvingly abut the cylinder 1.
  • Fibre-tufts are fed to the liker-in 2, from where the tufts are passed between the flat tops 3a and the cylinder 1 to facilitate preparation of fibre webs.
  • the opened fibre webs are passed through the doffer 4 and thereafter led to the output as slivers of fibres.
  • a flat top 3a, of the present disclosure, for the carding machine 100 will now be described in detail with reference to Figure 2 A through Figure 4B.
  • the flat top 3a comprises a flat top card clothing 10, 20 affixed over a flat bar 3aa.
  • the flat top card clothing 10, 20 comprises a card clothing foundation 5 which is made of a plurality of cotton-ply 5a bonded with rubber based gum and having a Vulcanized Indian Rubber (VIR) surface 5b provided on the operative top surface of the cotton-ply 5a.
  • VIR Vulcanized Indian Rubber
  • the card clothing 10, 20 further comprises a plurality of arrays of hardened and tempered steel wire staples 3b that are punched through the card clothing foundation 5 such that free ends of the staples 3b protrude out through the operative surface of the card clothing foundation 5.
  • the wire staple 3b is formed by bending a wire in the form of U, having a square base called as the crown 3c and two legs 3d (as shown in Figure 2A).
  • the wire has a cross-sectional configuration selected from the group consisting of round, elliptical, ovoid, rectangular or triangular.
  • the legs 3d of the wire staple 3b are ground to make both the legs 3d with pointed tip, so as to function the carding action.
  • the metallic card clothing 10, 20 is wound around the cylinder 1.
  • the card clothing 10, 20 (as shown in Figure 2 A) is suitably clipped on the rigid flat bars 3aa with a metal plate to form the flat top 3a.
  • the plurality of arrays of wire staples 3b defines a plurality of first airflow channels A between the wire staples 3b.
  • the first airflow channels A are parallel to an operative vertical axis P (as shown in Figures 3A through 4B).
  • the wire staples, of each array are configured to be offset to each other by a predetermined distance SI, S2 ... Sn to define a plurality of second air-flow channels therebetween.
  • Each second airflow channel comprises a plurality of airflow lanes B, Bl ... Bn that form an offset pattern of the second airflow channel.
  • the airflow lanes B, Bl... Bn are configured to allow air to pass therethrough, a predetermined velocity, to air in clearing away the impurities held between the legs of the wire staples while carding the fibre-tufts.
  • the card clothing foundation 5 includes at least two arrays of the wire staples 3b.
  • the staple rows are configured to be angularly disposed with respect to the vertical axis P initially by a first predetermined acute angle X, then by a second predetermined obtuse angle Y, and thereafter by a third predetermined acute angle Z.
  • the card clothing foundation 5 comprises a first array comprising a first set of staple rows having wire staples offset to each other by a specific off-set distance SI defining a first airflow channel A and a diagonal or oblique second airflow channel between the wire staples.
  • the second airflow channel is configured to allow air to flow therethrough.
  • the foundation further comprises a second array of wire staples offset at a distance of S2 such that the direction of the second airflow channel deflects from the first array to the second array.
  • this change in the offset of the staples 3b is repeated after a predetermined number of staple rows, thereby creating a deflection in the angular air flow lane direction.
  • Figure 3B illustrates off-sets of SI and S2 configured on the top 3a.
  • the wire take-up distance C defined between the staples 3b is configured to incrementally reduce from the first staple row to the last row (more specifically described as from bottom row to top row depicted in Figures 3B and 4B).
  • the staple rows are configured to be angularly disposed with respect to the vertical axis P initially by a first predetermined acute angle X, then by a second predetermined obtuse angle Y, and thereafter by a third predetermined acute angle Z.
  • the X-angle ranges from 60°-70°. In another embodiment, the Y-angle ranges from 95°-99°. In yet another embodiment, the Z-angle ranges from 75°-79°.
  • the off-set SI ranges between 1mm to 2mm. In another embodiment, the off-set S2 ranges between 1mm to 2.5mm. In another embodiment, it is required that the off-set SI has a value different from the value of the off-set S2.
  • the width of the first airflow channel A ranges from 0.1mm to 1mm.
  • the width of the second airflow channel ranges from 1mm to 2mm.
  • the staple arrays are set adjacent to each other such that the setting configuration is repeated after different number of staple rows, i.e., while in the first setting, the off-set SI is made for a first number of rows and then a different setting is done with a second off-set S2. Then once again the same off-set sequence is repeated to get shorter airflow deflections after a specific number of staple rows.
  • this specific multiple setting configuration on the same top 3a, the vertical air flow lanes are configured closer to each other, thereby helping in cleaning of the tops 3 a while keeping the flat tops 3a active during the carding operation.
  • the second airflow channel comprises a plurality of airflow lanes B, Bl, B2 and B3 that are deflected by X, XI, Y, Yl, Z, and Z1 angles.
  • the X-angle ranges from 60°-65°.
  • the Xl-angle ranges from 60°-65°.
  • the Y-angle ranges from 31°-35°.
  • the Yl-angle ranges from 31°-35°.
  • the Z-angle ranges from 95°-99°.
  • the Zl-angle ranges from 95°-99°.
  • the off-set SI ranges between 1mm to 2mm.
  • the off-set S2 ranges between 1mm to 2.5mm. In another embodiment, it is required that the off-set SI has a value different from the value of the off-set S2.
  • the width of the first airflow channel A ranges from 0.1mm to 1mm.
  • the width of the first airflow lane B ranges from 1 mm to 2mm. In yet another embodiment, the width of the second airflow lane Bl ranges from 1mm to 2.5mm. In still another embodiment, the width of the third airflow lane B2 ranges from 1mm to 2mm. In yet another embodiment, the width of the fourth airflow lane B3 ranges from 2mm to 3mm.
  • the population of the wire points is increased gradually by making the gap between the staple rows relatively narrower. This ensures gradual increase in the carding operation while keeping the width of the first airflow channel A narrower and deflecting the air flow lane.
  • the intensity of carding can be also enhanced gradually by increasing the wire point population in the flat tops 3a.
  • the flat top 3a thus provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation. Further, it improves the carding efficiency, thereby improving the quality of the fibre output, and simultaneously increasing the productivity of the carding machine.
  • the card clothing foundation 5 includes 30 to 60 numbers of wire staples are arranged thereon.
  • the present disclosure further envisages a carding machine 100 comprising a rotating cylinder 1, a liker-in 2 configured to be in communication with the cylinder 1, and configured to rotate in a direction opposite to the direction of rotation of the cylinder, and a doffer 4 configured to be in communication with the cylinder 1 , and configured to rotate in a direction opposite to the direction of rotation of the cylinder 1.
  • the machine 100 further comprises a conveyor 3 configured to revolvingly abut the cylinder 1.
  • the conveyor 3 has a plurality of flat tops 3a mounted thereon to enable carding of fibre-tufts fed between the flat tops 3a and the cylinder 1 to produce fibre webs.
  • Each flat top 3a is defined by a flat bar 3aa and a card clothing 10, 20 affixed over the flat bar 3aa.
  • the card clothing 10, 20 comprises a card clothing foundation 5, and a plurality of arrays of wire staples 3b provided on the card clothing foundation 5 to define a plurality of first airflow lanes A between the wire staples 3b.
  • Each array is defined by a plurality of wire staples 3b offset to each other by a predetermined distance SI, S2 ... Sn to define a plurality of second airflow channels therebetween.
  • Each second airflow channel comprises a plurality of airflow lanes B, B 1 ... Bn forming an offset pattern of the second airflow channel.
  • a carding machine provided with the flat tops of the present disclosure was run at varying delivery speeds ranging from 100-180mtrs/min.
  • NRE Neps Removal Efficiency
  • the present disclosure described hereinabove has several technical advantages including, but not limited to, the realization of a flat top for a carding machine which: provides relatively improved cleaning of the impurities collected thereon, while performing the carding operation;

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

Abstract

La présente divulgation concerne des chapeaux de machines de cardage et prévoit un chapeau (3a) destiné à la machine de cardage (100). Le chapeau (3a) comprend une barre plate (3aa) et une garniture de carde (10, 20) fixée sur la barre plate (3aa). La garniture de carde (10, 20) comprend une fondation (5) de garniture de carde et une pluralité de réseaux d'agrafes (3b) disposés sur la fondation (5) de garniture de carde pour former une pluralité de premières voies d'écoulement d'air (A) entre les agrafes (3b). Chaque réseau est formé par une pluralité d'agrafes (3b) décalées l'une par rapport à l'autre d'une distance prédéfinie (S1, S2, ..., Sn) pour former une pluralité de seconds canaux d'écoulement d'air entre lesdites agrafes.
PCT/IB2022/060093 2021-10-23 2022-10-20 Chapeau pour machine de cardage WO2023067543A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202121048394 2021-10-23
IN202121048394 2021-10-23

Publications (1)

Publication Number Publication Date
WO2023067543A1 true WO2023067543A1 (fr) 2023-04-27

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ID=86058913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/060093 WO2023067543A1 (fr) 2021-10-23 2022-10-20 Chapeau pour machine de cardage

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357738A (en) * 1980-05-29 1982-11-09 Graf & Cie. A.G. Card clothing for carding machines
DE3318580A1 (de) * 1983-05-20 1984-11-22 Aktiebolaget Kardbeslag, Norrköping Kratzenbeschlag
US6101680A (en) * 1997-09-12 2000-08-15 Maschinenfabrik Rieter Ag Card flat for a textile card machine
US20200255983A1 (en) * 2019-02-08 2020-08-13 Graf + Cie Ag Flat Clothing for a Revolving Flat of a Carding Machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357738A (en) * 1980-05-29 1982-11-09 Graf & Cie. A.G. Card clothing for carding machines
DE3318580A1 (de) * 1983-05-20 1984-11-22 Aktiebolaget Kardbeslag, Norrköping Kratzenbeschlag
US6101680A (en) * 1997-09-12 2000-08-15 Maschinenfabrik Rieter Ag Card flat for a textile card machine
US20200255983A1 (en) * 2019-02-08 2020-08-13 Graf + Cie Ag Flat Clothing for a Revolving Flat of a Carding Machine

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