This application claims priority from German Patent Application No. 10318966.1 dated 26 Apr. 2003 the disclosure of which is incorporated herein by relevance.
The invention relates to an apparatus on a carding machine for textile fibres, for example, cotton, synthetic fibres and the like, comprising revolving card flat bars equipped with clothing.
In certain known revolving card flat assemblies a space is present between the tips of the card flat clothings and the tips of the cylinder clothing and the card flat clothings form an adjustable angle with the cylinder clothing, wherein the ends of the card flat bars each slide with one part on a first curved slideway and with another part on a second curved slideway and the sliding-contact surfaces of the slideways—viewed circumferentially—have different distances from one another.
In a known apparatus (WO 00/05441), an adjusting device for the local displacement of the flexible second slideway is arranged centrally. On operation thereof, the second slideway is moved outwards or inwards in a radial direction with respect to the cylinder. The adjusting device includes a plurality of support members, which extend from a central support member and support the second curved slide such that the radial support members extend or contract in response to the position of the adjusting device. The adjusting device can operate hydraulically or pneumatically. The second guide means can be arranged in the operating region of the cylinder substantially parallel to the cylinder surface; alternatively, its relative position may vary around the working surface of the cylinder, in order to change the angle of inclination of the card flats as they traverse the working region of the cylinder and hence to influence the quality of carding obtained. It is not necessary to adjust each card flat bar individually; all that is required is a single adjustment of the position of the guide means with respect to the carding machine in order to set the angle of inclination of all card flat bars in the flat driving chain. The high structural complexity required for displacing and adjusting the card flat bars is a disadvantage. The known apparatus is costly in terms of equipment. It is a further disadvantage that the support members are only in point-contact engagement with the second slideway. In particular, it is inconvenient that the angles of inclination of all the card flat bars at any one time are adjustable. In this way, either all angles of inclination can only be increased or all angles of inclination can only be decreased. This uniform alignment of the card flat bars, or rather, of the card flat bar clothings, can lead to increased damage to the fibres and to nep formation. Finally, the clothings of the card flat bars are subject to considerable wear during operation.
It is an aim of the invention to provide an apparatus of the kind described in the introduction, which avoids or mitigates the said disadvantages, which in particular is of simple construction and is easy to assemble, enables the carding intensity of the card flat bars to be more flexibly adjusted and allows wear of the clothing on the card flat bars to be reduced.
The invention provides a carding machine comprising a carding cylinder and a revolving card flat assembly comprising revolving card flat bars, the machine further having a lateral slideway assembly comprising a first curved slideway and a second curved slideway and upon which ends of the card top bars can slide with a part on said first slideway and a part on said second slideway, wherein said first slideway has a first sliding-contact surface and said second slideway has a second sliding-contact surface which is so located relative to the first sliding-contact surface that there is at least a first portion of said slideway assembly in which a distance in the vertical direction between the first and second sliding-contact surfaces increases and a second portion of said slideway assembly in which said distance decreases.
The features according to the invention permit the angle between the clothing surface of each card flat bar and the cylinder clothing—the so-called offset angle—to be individually selected. A particular advantage comprises the fact that by specific or individual alignment of the clothing surfaces of the card flat bars in relation to one another, the ratio of fibre damage to nep formation can be quite considerably improved. Added to this is that the fact that the lasting technological improvement is rendered possible in a structurally especially simple way. The arrangement of the slideways enables additional devices for displacing the card flat bars and the slideways to be omitted. The individual adjustment of the angle of inclination is effected automatically by virtue of the fact that the sliding elements of the card flat bars slide on two sliding-contact surfaces, the mutual spacings of which both increase and decrease. In accordance with a further advantage, the individual inclination of the carding surfaces considerably reduces wear of the clothing on the card flat bars.
Advantageously, the distances of the sliding-contact surfaces of the slideways with respect to the cylinder clothing both increase and decrease.
Advantageously, the distances of the sliding-contact surfaces of the slideways do not become strictly monotonously smaller or larger with respect to one another. Advantageously, the slideways are arranged side by side on each of the carding machine. The second slideway may be integrated in the first slideway. The slideways may be of one-piece construction. The slideways may be arranged separately side by side.
Advantageously, two sliding elements are present on each card flat bar end, the sliding elements being of different cross-section and/or diameter.
Advantageously, in the end region of a respective sliding element there is arranged a cylindrical element, a disc or the like, which has a larger diameter than the respective other sliding element. Advantageously, at least one slideway is flexible. Advantageously, at least one slideway—in relation to the cylinder—is constructed to be displaceable in the circumferential direction.
Advantageously, at least one slideway is of wedge-form construction. Advantageously, the card flat bars are arranged so as to rotate about an axis of rotation parallel to the cylinder axis.
Advantageously, the axis of rotation is arranged in the middle of each card flat bar.
Advantageously, the angle between the carding surface of at least one card flat bar and a respective tangent to the clothing of the cylinder is adjustable. Advantageously, the angle between the carding surface of at least one card flat bar and a respective radius of the cylinder is individually adjustable. Advantageously, at least one carding nip closes (offset angle) at the fibre inlet, viewed in the direction of rotation of the cylinder. Advantageously, at the fibre outlet at least one carding nip opens (counter-offset angle), viewed in the direction of rotation of the cylinder. Advantageously, between fibre inlet and fibre outlet at least one angle amounts to 0°. Advantageously, the card flat bar automatically assumes different offset positions as it traverses the working region from card flat inlet to card flat exit. Advantageously, the different sliding elements, e.g. slide pins, of each card flat bar run on two sliding-contact surfaces (slide rails) of different heights relative to one another. Advantageously, the different diameters of the sliding region of the sliding elements cause an offset angle, no offset angle and a counter-offset angle of the card flat bar during a traverse thereof. Advantageously, the sliding elements, for example, slide pins, are fixed at the same height to the card flat bar. Advantageously, the sliding elements, for example, slide pins, are not fixed at the same height to the card flat bar.
Advantageously, the height gradient between the two slide rails has an arbitrary contour (sliding-contact surface). Advantageously, at least one slide rail is exchangeable for another slide rail having a different contour (sliding-contact surface). Advantageously, the two slide rails are each separately displaceable relative to one another on one side of the cylinder.
Advantageously, displacement of the slide rails is effected during continuous operation.
Advantageously, as the card flat bars are being guided over the working region a different offset angle is set independently of location.
Advantageously, two slide rail tracks are present and each sliding element, for example, card flat bar guide pin, moves on its own slide rail guide track. Advantageously, a slide rail with two different slide tracks is present on each side of the cylinder. Advantageously, the change in the offset angle is caused by an offset in height of the slide tracks relative to one another.
Advantageously, the offset in height over the path of the revolving card flat assembly is independent of location. Advantageously, the offset in height over the path of the revolving card flat assembly is freely selectable. Advantageously, the offset in height over the path of the revolving card flat assembly has offsets in continuity, for example, of a sharp-edge nature. Advantageously, the slide tracks over the path of the revolving card flat assembly, that is to say, the height offset, are unvarying. Advantageously, the slide tracks over the path of the revolving card flat assembly, that is to say, the height offset, are produced by material-removing machines. Advantageously, the sliding-contact surfaces cross one another, viewed in the lateral direction. Advantageously, at the intersection point of the sliding-contact surfaces there is, viewed in the lateral direction, no distance in the vertical direction between the sliding contact surfaces.
The invention also provides an apparatus on a carding machine for textile fibres, for example, cotton, synthetic fibres and the like, comprising revolving card flat bars equipped with clothing, in which a space is present between the tips of the card flat clothing and the tips of the cylinder clothing and the card flat clothings form an adjustable angle with cylinder clothing, wherein the ends of the card flat bars each slide with one part on a first curved slideway and with another part on a second curved slideway and the sliding-contact surfaces of the slideways—viewed circumferentially—are different distances from one another, wherein the sliding-contact surfaces of the slideways are arranged so that the distances in the vertical direction between the sliding contact surface both increase and decrease.
The invention also provides a carding machine comprising a carding cylinder and a revolving card flat assembly comprising revolving card flat bars, the machine further having a lateral slideway assembly comprising a first curved slideway and a second curved slideway and upon which the card flat bars can slide with a first end part on said first slideway and a second end part on said second slideway, wherein said first slideway has a first sliding-contact surface and said second slideway has a second sliding-contact surface which is so located relative to the first sliding-contact surface that there are at least a convergent portion and a divergent portion of said slideway assembly in which in the vertical direction said first and second sliding-contact surfaces respectively converge and diverge.
a is a side view of a revolving card top, showing schematically the adjustment of the angle between the card flat clothings and the cylinder clothing at the card flat outlet or fibre inlet (offset angle);
b is a side view of another part of the revolving card top of
a is a perspective view of one construction of slide rail according to the invention;
b is a perspective view of a second construction of slide rails;
c is a perspective view of a third construction of slide rails;
d is a side view of the slide rails of
e is section A—A in accordance with
f is section B—B in accordance with
g is section C—C in accordance with
a is a front view of an embodiment with slide rails of different heights, in which the sliding elements in the card flat bar are arranged at the same height and have different diameters in the end region;
b is a side view of the construction corresponding to
c is a perspective view of the construction according to
a is a front view of a further embodiment with sliding-contact surfaces of different heights, in which the sliding elements in the card flat bar are arranged at different heights and have the same diameter in the end region;
b is a side view of the construction corresponding to
c is a perspective view of the construction according to
a is a side view of a further embodiment with slide rails of different heights, in which the sliding elements in the card-flat bar are arranged at the same height and have the same diameter in the end region, and
b is a perspective view of the construction corresponding to
With reference to
Referring to
a and 3b show (to an exaggerated degree in the drawing) the changes in the angle α and β respectively subtended between successive card flat clothings 18a, 18b, 18c and the tangent to the cylinder clothing 4a. According to
Referring to
The angles α and β can be, for example, about 1°. The distance a at the narrowest point of the carding nip is for all card flat bars 14I to 14VI preferably the same or almost the same and can be, for example 3/1000″.
In
a shows two curved slideways 20 and 21, which consist, for example, of anti-friction plastics material and are flexible. The slideways 20, 21 are manufactured in one piece from a plastics material block, for example, by material-removing milling or similar processes. The slideways 20, 21 are formed without an intermediate space between them.
As shown in a perspective view in
In the embodiment of
Because the diameter d1 of the disc 14.1 is larger than the diameter d2 of the pin 14b2 and the distance f is larger than the distance g, at the card flat entry the sliding element 14b1 extends over the sliding-contact surface 20a to engage with the sliding-contact surface 21aarranged lower down. At the same time, the shorter sliding element 14b2 engages with the sliding-contact surface 20a arranged higher up. In this way, the opening carding nip of angle β is formed. As the card flat bar 14IV slides in direction C, at the card flat exit the sliding element 14b2, having slid beyond the intersection point of the two sliding-contact surfaces 20a, 21a, engages with the now lower sliding-contact surface 20a and the disc 14.1 engages with the higher sliding-contact surface 21a. By angling the card bars, the closing carding nip of angle α is formed at the card flat exit.
In the embodiment of
In the embodiment of
Although the foregoing invention has been described in detail by way of illustration and example for purposes of clarity and understanding, it will be obvious that changes and modifications may be practised within the scope of the appended claims.
Number | Date | Country | Kind |
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103 18 966 | Apr 2003 | DE | national |
Number | Name | Date | Kind |
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638111 | Gillett et al. | Nov 1899 | A |
5918349 | Leifeld et al. | Jul 1999 | A |
6047446 | Leder et al. | Apr 2000 | A |
6408488 | Leder et al. | Jun 2002 | B1 |
6691373 | Leder | Feb 2004 | B1 |
Number | Date | Country |
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43 04 148 | Nov 1993 | DE |
94 14 450 | Dec 1994 | DE |
101 05 855 | Aug 2002 | DE |
2 340 509 | Feb 2000 | GB |
2 372 045 | Aug 2002 | GB |
WO 0005441 | Feb 2000 | WO |
Number | Date | Country | |
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20040211037 A1 | Oct 2004 | US |