US20060010656A1 - Adjustment device for drafting device drafting distances - Google Patents
Adjustment device for drafting device drafting distances Download PDFInfo
- Publication number
- US20060010656A1 US20060010656A1 US11/159,970 US15997005A US2006010656A1 US 20060010656 A1 US20060010656 A1 US 20060010656A1 US 15997005 A US15997005 A US 15997005A US 2006010656 A1 US2006010656 A1 US 2006010656A1
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- United States
- Prior art keywords
- roller
- drafting
- rollers
- housing
- apron
- 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.)
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/44—Adjusting drafting elements, e.g. altering ratch
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
Definitions
- the present invention relates, according to the preamble to the independent Patent Claims 1 , 11 , and 12 , to a housing with a pair of rollers mounted inside it, a drafting device with a housing of this type, as well as a textile machine with a corresponding drafting device.
- Drafting devices are used in textile technology for the drafting or drawing of fibre slivers in spinning machines. Following the drawing process, the fibre slivers which are drawn in the drafting devices are spun by means of a spinning process to form a yarn.
- the invention described hereinafter is concerned with the adjustment, or adjustability, of the drafting devices referred to, i.e. the adjustability of the drafting distances in a drafting device.
- a drafting device consists of at least two pairs of rollers, but for preference of three or four pairs of rollers.
- a fibre sliver running through the drafting device is drawn by the different rotation speeds of the pairs of rollers. The drawing or drafting takes place between two pairs of rollers following in succession, i.e.
- nip or grip distance Located within such a nip distance is a drafting zone, in which the fibres of the fibre sliver are drawn against one another.
- Three-roller drafting devices with a preliminary drafting zone and a main drafting zone are widespread.
- the nip distances of the individual drafting zones must be adjusted to the staple length of the fibres which are to be processed.
- the optimum nip or grip distance is slightly longer than the longest fibres which are to be processed (by about 2 mm).
- the drafting zones In order to adjust the nip distances to the staple fibres to the optimum amount, the drafting zones must accordingly be adjustable steplessly or at least in very small steps (step length approx. 1 mm); this applies in particular to the preliminary drafting zone.
- the adjustability of the nip distance in the preliminary drafting zone is of particular importance because it is here that genuine drawing or drafting processes of 1.1 to 5 times are carried out, without an additional external fibre guide (such as an apron) being present.
- the main drafting zone with drafting or drawing procedures of about 10 to 100 times
- adjustability of the nip distance is likewise of advantage, even if in this case the fibre guidance is guaranteed by the aprons which are usually present. It is sufficient in this case, however, if the nip distance is adjustable in from two to a maximum of five steps.
- DE 489 810 One possible arrangement for this problem is disclosed by DE 489 810, although only for single-apron drafting devices which were used in earlier times.
- the adjustable upper intake roller disclosed in DE 489 810 is mounted on a guided carriage and is pressed by means of screws against the lower roller which pertains to it. Thanks to the simple design of single-apron drafting devices and the absence of an upper apron, the adjustment of the upper roller was easy to carry out.
- both rollers of the pair of inlet rollers are moved.
- This can be derived from their Description, since the device is intended to be suitable for the processing of short-staple and long-staple fibres, i.e. from cotton to wool. Because it must be possible for widely differing nip distances to be adjusted in order for such suitability to be attained, the text cannot disclose anything other than the joint adjustment of upper and lower rollers.
- the use of such a single-apron drafting device for the processing of short-staple as well as long-staple fibres is no longer conceivable in modern machines. Long aprons would be necessary for this, which, with the present-day speeds of high-speed drafting devices (speeds greater than 100 m/min), would begin to flutter.
- a further device for the adjustment of pairs of rollers is disclosed by EP 362 477 A1.
- the device which is disclosed in this relates to what are referred to as drafting or drawing frames. Drafting or drawing frames do not contain any aprons, since they are only required to achieve far fewer draftings. In return, however, they exhibit very high delivery speeds of up to 1000 m/min at the delivery roller pair.
- the contact pressure at the nip line between two rollers is also very high, in order that it can be ensured that nipping or gripping is still sufficient at these speeds and with these large fibre masses.
- the use of aprons is excluded, since a very high amount milling work occurs at the apron, as a result of which the apron would become too hot due to the poor heat dissipation.
- the present invention is therefore based on the problem of improving the adjustability of the nip distance to modern high-speed drafting devices (outlet speeds greater than 100 m/min).
- bottom roller and “top roller”.
- These designations of the two rollers which are generally conventional in textile technology, are derived in particular from the arrangement of the drafting device, which as a rule is horizontal.
- the spatial arrangement of the drafting device and of the rollers is, however, absolutely not of significance to the present invention.
- the term “bottom roller” can, as a rule, be understood to mean the cylinder of the roller pair. This is for preference made of metal (such as steel).
- the “top roller” as a rule exhibits an elastic covering (e.g. rubber).
- the nip distance can be adjusted simply by an axle being moved, without any disadvantageous effects being determined on the yarn quality or the spinning result.
- the adjustment of the nip distances is thereby substantially simplified. If only one roller is moved, a cage can be used for the rigidly mounted roller, which does not need to be changed in the event of adjustment. This too simplifies the adjustment.
- the loading force on the nip point can be automatically or manually adjusted.
- the apron may exhibit a tensioning device at the movably mounted roller.
- both rollers have an apron
- both aprons may each exhibit a tensioning device. It would also be conceivable, however, for particularly elastic or extendible aprons to be used, as a result of which no apron tensioning devices would have to be used. And even if the aprons must be replaced because a tensioning device or the elastic properties are not present, a considerable time saving is still achieved, because only one roller needs to be moved.
- FIG. 1 An adjustable pair of rollers according to the invention
- FIG. 2 An adjustable pair of rollers according to the invention with an apron tensioning device
- FIG. 3 A housing for an adjustable pair of rollers according to the invention
- FIG. 4 A spinning position of a textile machine with a drafting device, which exhibits an adjustable pair of rollers according to the invention
- FIG. 1 shows an adjustable pair of rollers 2 according to the invention.
- the rollers of the pair of rollers 2 are naturally mounted in an appropriate housing, although for the sake of overview this is not represented in the Figure.
- the pair of rollers 2 consists of a bottom roller 4 and a top roller 5 , which are in contact at what is referred to as the nip line 6 .
- the top roller 5 is rigid in its arrangement.
- the bottom roller 4 by contrast, is arranged so as to be movable about the axis of the top roller 5 , with the result that the nip line is movable (see positions shown as dotted lines and arrow in FIG. 1 ).
- the nip line 6 and therefore also the nip distance from the preceding roller pair to the next roller pair (not represented) can be shortened or lengthened.
- the bottom roller 4 In order for the bottom roller 4 to be arranged axial-symmetrically about the rigidly arranged top roller 5 , no adjustment of the top roller 5 is provided for. As a result, not only can a readjustment be carried out more quickly, but the mounting of the top roller 5 can also be simpler in design.
- the adjustability according to the invention of the roller pair allows for a single cage 9 and a single top apron to be used.
- aprons 8 are applied to both the rollers.
- the aprons are tensioned by the reversing rail 10 or the cage 9 .
- the apron 8 of the bottom roller 4 it is necessary for the apron 8 of the bottom roller 4 , as represented, to be extendible, or to be tensioned by means of an appropriate tensioning device (see FIG. 2 following).
- the top roller 5 is arranged in a rigid manner (i.e. its axle is not movable). According to the invention, however, it would also be conceivable for the rigid axle of the top roller 5 to be capable of movement in the plane 7 , which is formed by the two axes of the rollers.
- a displaceable mounting of this type would be sensible provided that the fibre material to be drawn or passing the nip line is compressed in a constant and uniform manner at the nip line 6 (a loading means which can be used for this purpose is represented in FIG. 3 described hereinafter).
- An axis which is displaceable in this manner would have the effect that a deflection of the top roller 5 would not lead to any displacement of the nip line 6 .
- FIG. 2 shows the adjustable pair of rollers 2 according to the invention and according to FIG. 1 , whereby an additional apron tensioning device 13 is provided for.
- This apron tensioning device 13 is intended in particular for aprons 8 which are not elastic, or not sufficiently elastic, to compensate for the different nip distance lengths due to extension.
- the apron tensioning device 13 shown can be designed as a tensioning spring. Other tensioning devices are also conceivable, however. It may of course be necessary for such a tensioning device to be provided for the apron of the top roller (not shown), if this is also not sufficiently elastic. If elastic properties or suitable tensioning devices are not present, the bottom apron can, according to the invention, also simply be replaced.
- roller 5 mounted rigidly or only movable in the plane 7 , exhibits an apron 8 , although this is shown in the Figures.
- FIG. 3 shows a housing 1 with a roller pair 2 mounted according to the invention.
- the housing 1 is represented in diagrammatic form.
- the mounting for a further pair of rollers 14 may also be exhibited.
- a further, third pair of rollers are mounted in the housing 1 .
- the axle of the top roller 5 is not arranged rigidly, but is mounted in a moveable manner in the housing, in the plane formed by the two axles of the rollers 4 and 5 .
- the top roller 5 is subjected to load by means of a loading means 12 (represented in this case by a spring).
- the loading means 12 are adjustable.
- a curved longitudinal hole 11 there are two possibilities represented in the Figure for the movement of the nip line: In one case, provision is made for a curved longitudinal hole 11 . A second variant shows a straight longitudinal hole 11 (represented as a broken line). For the latter variant, an adjustment of the top roller 5 is also necessary, which in this case is assured by the longitudinal hole 18 . In addition, provision can be made in the lower part of the housing 1 for a reversing rail 10 . The reversing rail 10 is required for the tensioning of the bottom apron (apron not shown).
- the pair of rollers 2 and the pair of rollers 14 represent the main draft zone of a drafting device, whereby a further pair of rollers would then be provided for in the housing 1 in front of the pair of rollers 4 (intake roller pair of a three-roller drafting device).
- the housing 1 it would be conceivable for the housing 1 to accommodate only the pair of rollers 4 mounted according to the invention, and for other pairs of rollers of the drafting device to be mounted in other ways.
- FIG. 4 shows a spinning position of a textile machine which is equipped with an apron drafting device 3 .
- the apron drafting device 3 exhibits a pair of rollers 2 , which according to the invention are adjustable (represented in diagrammatic form only on the basis of the arrow at the bottom roller). Apart from this, it is also conceivable according to the invention that instead of the bottom roller, the top roller according to the invention is adjustable. The invention is particularly well-suited for double-apron drafting devices.
- the roller pair 2 with the adjustable roller 4 according to the invention, forms the main drafting zone 15 of the apron drafting device 3 .
- the Figure shows a spinning position with a spinning box 20 , which is producing a yarn 17 by means of an air-spinning method.
- a fibre sliver 19 is guided through the apron drafting device 3 , in which it runs through the preliminary drafting zone 16 and the main drafting zone 15 .
- the fibre structure 21 which is drafted in this way is then conducted into the spinning box 20 , where, by means of an air flow 23 around the mouth of a spindle 22 , the drafted fibre structure 21 is spun to form a yarn 17 .
- the invention is naturally also well-suited for spinning positions which manufacture a yarn by means of another spinning method. For example, instead of the air spinning process, a ring spinning process may be used.
- the invention is particularly well-suited for spinning machines with several spinning positions, whereby the spinning positions are independently equipped with individual drives (i.e. the drive is not effected by means of long shafts, which drive several spinning positions simultaneously).
- two pairs of rollers are equipped with an adjustment device according to the invention.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention in the sector of textile technology relates to a housing (1) with a roller pair (2) mounted in it, whereby the housing and the roller pair (2) are for preference constituent part of an apron drafting device (3). The roller pair (2) consist of a bottom roller (4) and a top roller (5), which together form a nip or grip line (6). Both rollers are mounted in the housing (1), whereby one roller (5) is mounted rigid or essentially only movable in the housing (1) in the plane (7) formed by the two axles of the rollers (4, 5). The other roller (4), by contrast, is mounted so as to be movable in the housing (1) in such a way that the nip or grip line (6) can thereby be moved. According to the invention, the roller (4) mounted in the housing (1) so as to be movable exhibits an apron (8).
Description
- The present invention relates, according to the preamble to the
independent Patent Claims - Drafting devices are used in textile technology for the drafting or drawing of fibre slivers in spinning machines. Following the drawing process, the fibre slivers which are drawn in the drafting devices are spun by means of a spinning process to form a yarn. The invention described hereinafter is concerned with the adjustment, or adjustability, of the drafting devices referred to, i.e. the adjustability of the drafting distances in a drafting device. A drafting device consists of at least two pairs of rollers, but for preference of three or four pairs of rollers. A fibre sliver running through the drafting device is drawn by the different rotation speeds of the pairs of rollers. The drawing or drafting takes place between two pairs of rollers following in succession, i.e. in the area between the nip lines of the two pairs of rollers. The distance between two such nip lines is also referred to as the nip or grip distance. Located within such a nip distance is a drafting zone, in which the fibres of the fibre sliver are drawn against one another. Three-roller drafting devices with a preliminary drafting zone and a main drafting zone are widespread. In order to achieve optimum guidance and optimum drawing of the fibres in the drafting devices, the nip distances of the individual drafting zones must be adjusted to the staple length of the fibres which are to be processed. In the drafting zones, the optimum nip or grip distance is slightly longer than the longest fibres which are to be processed (by about 2 mm). In order to adjust the nip distances to the staple fibres to the optimum amount, the drafting zones must accordingly be adjustable steplessly or at least in very small steps (step length approx. 1 mm); this applies in particular to the preliminary drafting zone. The adjustability of the nip distance in the preliminary drafting zone is of particular importance because it is here that genuine drawing or drafting processes of 1.1 to 5 times are carried out, without an additional external fibre guide (such as an apron) being present. For the main drafting zone (with drafting or drawing procedures of about 10 to 100 times), adjustability of the nip distance is likewise of advantage, even if in this case the fibre guidance is guaranteed by the aprons which are usually present. It is sufficient in this case, however, if the nip distance is adjustable in from two to a maximum of five steps.
- It is generally usual (e.g. with ring-spinning drafting devices), when adjusting the nip distance, always to move two axles of a roller pair (see in this connection, for example,
DE 1 123 959 or DE 1 122 885). That is to say, both the driven roller as well as the loaded top roller are moved together. These devices demonstrate the disadvantage of conventional drafting devices. The adjustment of the pairs of rollers when the fibre material which is to be processed is changed is associated with a considerable amount of work. This applies in particular if the main drafting or drawing distance must he changed, since in this case both the lower as well as the upper aprons and all upper apron cages must be replaced. - One possible arrangement for this problem is disclosed by DE 489 810, although only for single-apron drafting devices which were used in earlier times. The adjustable upper intake roller disclosed in DE 489 810 is mounted on a guided carriage and is pressed by means of screws against the lower roller which pertains to it. Thanks to the simple design of single-apron drafting devices and the absence of an upper apron, the adjustment of the upper roller was easy to carry out.
- With modern double-apron drafting devices, adjustability of this kind is no longer possible, since the upper roller carries an apron.
- With the device according to
DE 1 122 885, both rollers of the pair of inlet rollers are moved. This can be derived from their Description, since the device is intended to be suitable for the processing of short-staple and long-staple fibres, i.e. from cotton to wool. Because it must be possible for widely differing nip distances to be adjusted in order for such suitability to be attained, the text cannot disclose anything other than the joint adjustment of upper and lower rollers. The use of such a single-apron drafting device for the processing of short-staple as well as long-staple fibres is no longer conceivable in modern machines. Long aprons would be necessary for this, which, with the present-day speeds of high-speed drafting devices (speeds greater than 100 m/min), would begin to flutter. - A further device for the adjustment of pairs of rollers is disclosed by EP 362 477 A1. The device which is disclosed in this, however, relates to what are referred to as drafting or drawing frames. Drafting or drawing frames do not contain any aprons, since they are only required to achieve far fewer draftings. In return, however, they exhibit very high delivery speeds of up to 1000 m/min at the delivery roller pair. The contact pressure at the nip line between two rollers is also very high, in order that it can be ensured that nipping or gripping is still sufficient at these speeds and with these large fibre masses. With high speeds and pressures of this type, the use of aprons is excluded, since a very high amount milling work occurs at the apron, as a result of which the apron would become too hot due to the poor heat dissipation.
- The present invention is therefore based on the problem of improving the adjustability of the nip distance to modern high-speed drafting devices (outlet speeds greater than 100 m/min).
- This problem is resolved by the features in the
independent Patent Claims - In the Claims and the following Description, mention is made of “bottom roller” and “top roller”. These designations of the two rollers, which are generally conventional in textile technology, are derived in particular from the arrangement of the drafting device, which as a rule is horizontal. The spatial arrangement of the drafting device and of the rollers is, however, absolutely not of significance to the present invention. On the contrary, in particularly preferred application possibilities of the invention, provision is even expressly made for the drafting device to be arranged essentially perpendicularly. Attention is therefore expressly drawn to the fact that the terms “bottom roller” and “top roller” throughout the application are not to be interpreted in respect of their spatial position, restricting them to “top” or “bottom”. The term “bottom roller” can, as a rule, be understood to mean the cylinder of the roller pair. This is for preference made of metal (such as steel). The “top roller” as a rule exhibits an elastic covering (e.g. rubber).
- It has been demonstrated that, in particular with high-speed drafting devices, the nip distance can be adjusted simply by an axle being moved, without any disadvantageous effects being determined on the yarn quality or the spinning result. The adjustment of the nip distances is thereby substantially simplified. If only one roller is moved, a cage can be used for the rigidly mounted roller, which does not need to be changed in the event of adjustment. This too simplifies the adjustment. In order to keep the nip or grip forces between the two rollers constant during the adjustment, it is advantageous if the loading force on the nip point can be automatically or manually adjusted. In order for the aprons to exhibit sufficient tension in every position to which they are adjusted, the apron may exhibit a tensioning device at the movably mounted roller. If both rollers have an apron, then both aprons may each exhibit a tensioning device. It would also be conceivable, however, for particularly elastic or extendible aprons to be used, as a result of which no apron tensioning devices would have to be used. And even if the aprons must be replaced because a tensioning device or the elastic properties are not present, a considerable time saving is still achieved, because only one roller needs to be moved.
- Advantageous embodiments and forms of the invention are to be found in the dependent Claims.
- The invention and the concepts of the invention are explained hereinafter on the basis of the embodiments represented in the Figures. Attention should be expressly drawn to the fact, however, that the invention and the concept of the invention are not restricted to the embodiments shown in the examples. These show:
-
FIG. 1 An adjustable pair of rollers according to the invention -
FIG. 2 An adjustable pair of rollers according to the invention with an apron tensioning device -
FIG. 3 A housing for an adjustable pair of rollers according to the invention -
FIG. 4 A spinning position of a textile machine with a drafting device, which exhibits an adjustable pair of rollers according to the invention -
FIG. 1 shows an adjustable pair ofrollers 2 according to the invention. The rollers of the pair ofrollers 2 are naturally mounted in an appropriate housing, although for the sake of overview this is not represented in the Figure. The pair ofrollers 2 consists of abottom roller 4 and atop roller 5, which are in contact at what is referred to as thenip line 6. Thetop roller 5 is rigid in its arrangement. Thebottom roller 4, by contrast, is arranged so as to be movable about the axis of thetop roller 5, with the result that the nip line is movable (see positions shown as dotted lines and arrow inFIG. 1 ). As a result of the movement of the bottom roller 4 (see arrow), thenip line 6, and therefore also the nip distance from the preceding roller pair to the next roller pair (not represented) can be shortened or lengthened. In order for thebottom roller 4 to be arranged axial-symmetrically about the rigidly arrangedtop roller 5, no adjustment of thetop roller 5 is provided for. As a result, not only can a readjustment be carried out more quickly, but the mounting of thetop roller 5 can also be simpler in design. In addition to this, the adjustability according to the invention of the roller pair allows for asingle cage 9 and a single top apron to be used. Hitherto, with the adjustment devices according to the prior art, it was not only necessary for both rollers to be moved, but it was also necessary, as well as thecage 9, for the apron to be replaced (in order to adjust to the new nip distance). Due to the fact that theroller 5 is arranged to be rigid, this requirement for replacement no longer applies, as a result of which a considerable saving of time can be achieved. - In
FIG. 1 ,aprons 8 are applied to both the rollers. The aprons are tensioned by the reversingrail 10 or thecage 9. For the adjustability of thebottom roller 4, it is necessary for theapron 8 of thebottom roller 4, as represented, to be extendible, or to be tensioned by means of an appropriate tensioning device (seeFIG. 2 following). As mentioned earlier, thetop roller 5 is arranged in a rigid manner (i.e. its axle is not movable). According to the invention, however, it would also be conceivable for the rigid axle of thetop roller 5 to be capable of movement in theplane 7, which is formed by the two axes of the rollers. A displaceable mounting of this type would be sensible provided that the fibre material to be drawn or passing the nip line is compressed in a constant and uniform manner at the nip line 6 (a loading means which can be used for this purpose is represented inFIG. 3 described hereinafter). An axis which is displaceable in this manner would have the effect that a deflection of thetop roller 5 would not lead to any displacement of thenip line 6. -
FIG. 2 shows the adjustable pair ofrollers 2 according to the invention and according toFIG. 1 , whereby an additionalapron tensioning device 13 is provided for. Thisapron tensioning device 13 is intended in particular foraprons 8 which are not elastic, or not sufficiently elastic, to compensate for the different nip distance lengths due to extension. Theapron tensioning device 13 shown can be designed as a tensioning spring. Other tensioning devices are also conceivable, however. It may of course be necessary for such a tensioning device to be provided for the apron of the top roller (not shown), if this is also not sufficiently elastic. If elastic properties or suitable tensioning devices are not present, the bottom apron can, according to the invention, also simply be replaced. - According to the invention as described heretofore, and as represented in particular in
FIGS. 1 and 2 , it is not essential to the invention that theroller 5, mounted rigidly or only movable in theplane 7, exhibits anapron 8, although this is shown in the Figures. -
FIG. 3 shows ahousing 1 with aroller pair 2 mounted according to the invention. Thehousing 1 is represented in diagrammatic form. As well as a pair ofrollers 2, adjustable according to the invention, the mounting for a further pair ofrollers 14 may also be exhibited. It is also conceivable that a further, third pair of rollers are mounted in thehousing 1. In this arrangement it can very readily be appreciated that the axle of thetop roller 5 is not arranged rigidly, but is mounted in a moveable manner in the housing, in the plane formed by the two axles of therollers top roller 5 is subjected to load by means of a loading means 12 (represented in this case by a spring). For preference, the loading means 12 are adjustable. There are two possibilities represented in the Figure for the movement of the nip line: In one case, provision is made for a curvedlongitudinal hole 11. A second variant shows a straight longitudinal hole 11 (represented as a broken line). For the latter variant, an adjustment of thetop roller 5 is also necessary, which in this case is assured by the longitudinal hole 18. In addition, provision can be made in the lower part of thehousing 1 for a reversingrail 10. The reversingrail 10 is required for the tensioning of the bottom apron (apron not shown). For preference, the pair ofrollers 2 and the pair ofrollers 14 represent the main draft zone of a drafting device, whereby a further pair of rollers would then be provided for in thehousing 1 in front of the pair of rollers 4 (intake roller pair of a three-roller drafting device). In a further variant of the invention (not shown), however, it would be conceivable for thehousing 1 to accommodate only the pair ofrollers 4 mounted according to the invention, and for other pairs of rollers of the drafting device to be mounted in other ways. -
FIG. 4 shows a spinning position of a textile machine which is equipped with an apron drafting device 3. The apron drafting device 3 exhibits a pair ofrollers 2, which according to the invention are adjustable (represented in diagrammatic form only on the basis of the arrow at the bottom roller). Apart from this, it is also conceivable according to the invention that instead of the bottom roller, the top roller according to the invention is adjustable. The invention is particularly well-suited for double-apron drafting devices. Theroller pair 2, with theadjustable roller 4 according to the invention, forms themain drafting zone 15 of the apron drafting device 3. The Figure shows a spinning position with a spinning box 20, which is producing ayarn 17 by means of an air-spinning method. To do this, in the first instance afibre sliver 19 is guided through the apron drafting device 3, in which it runs through thepreliminary drafting zone 16 and themain drafting zone 15. Thefibre structure 21 which is drafted in this way is then conducted into the spinning box 20, where, by means of anair flow 23 around the mouth of aspindle 22, the draftedfibre structure 21 is spun to form ayarn 17. The invention is naturally also well-suited for spinning positions which manufacture a yarn by means of another spinning method. For example, instead of the air spinning process, a ring spinning process may be used. The invention is particularly well-suited for spinning machines with several spinning positions, whereby the spinning positions are independently equipped with individual drives (i.e. the drive is not effected by means of long shafts, which drive several spinning positions simultaneously). For preference, with three-roller drafting devices two pairs of rollers are equipped with an adjustment device according to the invention. - The invention is not restricted to the possibilities and embodiments explicitly mentioned. Rather, these variants are intended to serve as incentives for the person skilled in the art to implement the idea of the invention in the most favourable possible manner. Accordingly, further advantageous applications and combinations can be derived from the embodiments described, which likewise reproduce the concept of the invention and are intended to be protected by this Application. Some of the disclosed features have been described in combination in this Description, and are claimed in combination in the following Claims. It is, however, also conceivable for individual features of this Description to be claimed alone or in another combination in application of the concept of the invention. The Applicants therefore expressly reserve the right to make provision for other combinations in the application of the concept according to the invention.
-
- 1 Housing
- 2 Roller pair
- 3 Apron drafting device
- 4 Bottom roller
- 5 Top roller
- 6 Nip or grip line
- 7 Plane of the two roller axles
- 8 Apron
- 9 Cage
- 10 Reversing rail
- 11 Longitudinal hole
- 12 Loading means
- 13 Apron tensioning device
- 14 Additional roller pair
- 15 Main drafting zone
- 16 Preliminary drafting zone
- 17 Yarn
- 18 Longitudinal hole for top roller 3
- 19 Fibre structure
- 20 Spinning box
- 21 Stretched fibre structure
- 22 Spindle
- 23 Air flow
Claims (2)
1. A housing (1) with a roller pair (2) located inside it, whereby the housing (1) and the roller pair (2) are for preference constituent parts of an apron drafting device (3), whereby the roller pair (2) consist of a bottom roller (4) and a top roller (5), which together form a nip or grip line (6) and which are mounted at the housing (1), whereby one roller (5) is mounted rigid or essentially only movable in the housing (1) in the plane (7) formed by the two axles of the rollers (4, 5), and the other roller (4) is mounted so as to be movable in the housing (1) in such a way that the nip or grip line (6) can in this way be moved,
characterized in that
the roller (4) which can be moved in the housing (1) carries an apron (8).
2-12. (canceled)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04015085A EP1609894A1 (en) | 2004-06-26 | 2004-06-26 | Device for adjusting the length of the draft zone |
EP04015085.6 | 2004-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060010656A1 true US20060010656A1 (en) | 2006-01-19 |
Family
ID=34925504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/159,970 Abandoned US20060010656A1 (en) | 2004-06-26 | 2005-06-23 | Adjustment device for drafting device drafting distances |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060010656A1 (en) |
EP (1) | EP1609894A1 (en) |
JP (1) | JP2006009237A (en) |
CN (1) | CN1712586A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009001928A (en) * | 2007-06-20 | 2009-01-08 | Murata Mach Ltd | Side plate, drafting device, and textile machine |
CN114291622A (en) * | 2021-12-31 | 2022-04-08 | 安徽兰翔纺机科技有限公司 | Spinning rubber ring assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4870720A (en) * | 1987-05-12 | 1989-10-03 | Zinser Textilmaschinen Gmbh | Roving guide apparatus |
US5479680A (en) * | 1990-04-06 | 1996-01-02 | Stalder; Herbert | Sliver drafting apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR602986A (en) * | 1925-09-07 | 1926-04-06 | Le Blan Et Cie Soc | Improvements in stretching systems for preparatory machines and cotton spinning machines |
DE969577C (en) * | 1951-12-12 | 1958-06-19 | Josef Pfenningsberg & Co | Upper apron cage for double apron drafting systems on spinning machines |
GB712512A (en) * | 1952-03-06 | 1954-07-28 | Tmm Research Ltd | Improvements in or relating to textile drafting apparatus |
DE3832063A1 (en) * | 1988-09-21 | 1990-03-22 | Zinser Textilmaschinen Gmbh | STRETCHER FOR A SPINNING MACHINE |
-
2004
- 2004-06-26 EP EP04015085A patent/EP1609894A1/en not_active Withdrawn
-
2005
- 2005-06-23 US US11/159,970 patent/US20060010656A1/en not_active Abandoned
- 2005-06-24 JP JP2005185394A patent/JP2006009237A/en active Pending
- 2005-06-24 CN CNA2005100791032A patent/CN1712586A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4870720A (en) * | 1987-05-12 | 1989-10-03 | Zinser Textilmaschinen Gmbh | Roving guide apparatus |
US5479680A (en) * | 1990-04-06 | 1996-01-02 | Stalder; Herbert | Sliver drafting apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN1712586A (en) | 2005-12-28 |
EP1609894A1 (en) | 2005-12-28 |
JP2006009237A (en) | 2006-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MASCHINENFABRIK RIETER AG, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STALDER, HERBERT;WUST, OLIVIER;REEL/FRAME:016729/0439;SIGNING DATES FROM 20050617 TO 20050622 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |