CN101235561B

CN101235561B - Drafting device with condensing zone

Info

Publication number: CN101235561B
Application number: CN2008100053287A
Authority: CN
Inventors: G·斯塔莱克
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2007-02-01
Filing date: 2008-02-01
Publication date: 2011-06-08
Anticipated expiration: 2028-02-01
Also published as: EP1953275B1; ES2330058T3; BRPI0800079A; DE502008000076D1; DE102007006282A1; JP5219189B2; ATE440160T1; CN101235561A; EP1953275A1; BRPI0800079B1; JP2008190107A

Abstract

The stretching unit (1) has a driveable lower roller (6) attached to press rollers (7, 16). A mechanical unit compresses a fiber assembly moved between the press rollers in a compression zone (14). A transport unit (19) supports the fiber assembly between clamping lines (12, 15) of the press rollers in the compression zone. The mechanical unit compresses a guiding surface with which the fiber assembly is diverted in an axial direction of the lower roller around a part of the width of the fiber assembly from a transport direction.

Description

Drafter with compressional zone

Technical field

The present invention relates to a kind of coarse-fibred drafter of drawing-off that is used for, comprise drivable bottom roll, wherein this bottom roll disposes two pressurization rollers, wherein in two compressional zones of pressurization between the roller, be provided with the mechanism of the machinery that is used for being compressed in the drafted fiber strip of drafter, and in this compressional zone, be provided with the conveying mechanism of the fiber strip that will compress between the clamping line that is used to be supported in two pressurization rollers.

The present invention relates to a kind of compression member that is used for the coarse-fibred drafter of drawing-off in addition, the bearing-surface that comprises the recessed cylindrical so of the bottom roll that is used for drafter, with the mechanism that comprises the machinery that is used for being compressed in the drafted fiber strip of drafter, this mechanism comprises the spigot surface of at least two mutual alternate settings, and this spigot surface is directly in abutting connection with bearing-surface.

Background technology

This drafter and compression member become prior art by patent documentation WO2006/005207A1.This known mechanism that is used to compress is configured to pressure channel.This pressure channel narrows down gradually along the throughput direction of fiber strip.The side of pressure channel forms spigot surface, and this spigot surface is positioned on the both sides of fiber strip and their spacing more and more reduces along the throughput direction of fiber strip.Fiber strip is compressed and compacting thus.Various multi-form pressure channels have been described.The something in common of all pressure channels is that the width of the pressure channel in the district has been determined the yardstick of the compression of fiber strip endways.The mutual spacing of side spigot surface therefore must be very little, so that conpressed fibers yarn sufficiently.It mostly just is a few tenths of millimeter.But the blocked and interrupted situation of operation of this narrow end region of pressure channel usually takes place at run duration.Obstruction can be by the fiber strip that will compress thick part and mainly be when handling natural fabric such as cotton, to produce by shell part or cotton knot.

Summary of the invention

Task of the present invention is to improve to be used to compress the mechanism of drafted fiber strip and to reduce the obstruction tendency.

This task is to solve like this in drafter, and the mechanism that promptly is used to compress comprises at least one spigot surface, by means of this spigot surface can make fiber strip along bottom roll axially from its throughput direction deflection amount of its width at least.This task is to solve like this in compression member, and promptly from the circumferencial direction of the bearing-surface of cylindrical so, two spigot surfaces have a spacing each other.

By adopting design of the present invention can abandon a kind of pressure channel, the width of this pressure channel must be adjusted and therefore very narrow according to the width of compressed fiber strip.Spigot surface makes the transversely deflection of fiber strip at its throughput direction.A spigot surface obliquely that is arranged in the throughput direction of fiber strip makes fiber strip produce compression and rolling, and need not form the spigot surface of narrow passage with this first spigot surface in couple positioned opposite.Tilting spigot surface also can be individually acts on as the limit that turns to of fiber strip.Be positioned at outside thus and outstanding fiber is directed to and fiber strip becomes very tight.Add in twisting and in fact no longer occurs so-called " spinning triangular zone " feared man-hour this moment, and therefore the yarn of formation has higher intensity and less degree of fuzz.

Advantageously, the mechanism that is used to compress comprises at least two spigot surfaces, and they are arranged on the relative side of fiber strip.Fiber strip thus can by before and after the spigot surface one after the other along bottom roll axially from its throughput direction deflection.Fiber strip is changed direction by twice thus, thereby can reach extraordinary compression effectiveness.Requirement according to different can certainly be provided with a plurality of spigot surfaces, and they make fiber strip repeatedly commutate.

Even be provided with two or more spigot surfaces, their mutual spacings are also always greater than the width of compressed fiber strip.Preferably, the minimum spacing between two spigot surfaces even greater than the several times of the width of compressed fiber strip for example is that twice is big so at least.Compression effectiveness is no longer determined by the mutual spacing of spigot surface, but is determined from the deflection on its throughput direction by fiber strip.Therefore the mutual spacing of spigot surface can not influence and select greatlyyer under the situation of compression effectiveness, makes slub in the fiber strip or the cotton knot that may contain or cot part also no longer can block compression member.

Arrange in this wise on compression member when two spigot surfaces, make to have an imaginary circumference, when this circumference is completed a business transaction by two spigot surfaces, then can reach a kind of good compression effectiveness along the bearing-surface of the cylindrical so of compression member.

Be used for supporting that the conveying mechanism of compressed fiber strip preferably is supported in whole compressional zone thing Muller's fibers yarn discontinuously.Preferably, conveying mechanism is formed by the excircle of bottom roll, and compression member is bearing on this excircle.

A kind of good compression effectiveness can reach like this, that is, fiber strip bears a little drafting tension in the compressional zone.The effect of this drafting tension is, fiber strip very well abutted in be configured to commutate on the spigot surface on limit, because the single crude fibre that is under the drafting tension of fiber strip has by way of the trend of the shortest route between two clamping lines.The different hardness and the realization of thrust in various degree of the elastic overcoat that fiber strip little drafting tension for example can be by two pressurization rollers in the compressional zone.Preferably, the overcoat of the pressurization roller after the compressional zone is softer than the overcoat of the pressurization roller before the compressional zone.Pressurization roller after the compressional zone can be with less thrust roof pressure on bottom roll in addition.

In order to prolong the life-span of pressurization roller, the reciprocal converting means coupling of the mechanism that will be used to compress and drafter connection advantageously, this reciprocal converting means carries out past complex transformation campaign with the fiber strip that transversely makes that moves slowly at throughput direction.

If a plurality of fiber strips of drawing-off in a drafter as taking place, so advantageously, are at least two spigot surfaces of each fiber strip setting when making charging yarn, they are the conpressed fibers yarn individually, and is not connected with other fiber strip.Advantageously have at least two spigot surfaces for each fiber strip compression member for this reason.Spigot surface is advantageously arranged like this, make the spacing of fiber strip in the compressional zone, diminish, thereby the clamping line place fiber strip after being arranged in the compressional zone is focused at together on a little spacing, and this little spacing enough keeps the fiber strip of compression separately.

Other advantage of the present invention and feature can obtain from the explanation of following several embodiment.

Description of drawings

Fig. 1 has a side view of cutting open according to the part of the drafter of compression member of the present invention,

Fig. 2 is the diagrammatic top view of the drafter of Fig. 1 along arrow II direction, has wherein taken away the pressurization roller,

Fig. 3 is the view of compression member along the strong amplification of arrow III direction among Fig. 1,

Fig. 4 is the view that the section IV-IV along Fig. 3 of compression member cuts open,

Fig. 5 be used for charging yarn compression member a kind of flexible program with the similar view of Fig. 3.

The specific embodiment

Drafter 1 shown in Figure 1 consists essentially of is furnished with

compressible pressurization roller

3,5,7 driven

roller

2,4,6, and they will be drawing to the fineness of hope by the fiber strip 8 that crude fibre constitutes along throughput direction A.Fiber strip 8 infeeds drafter 1 by carded sliver guider 9 and pass through guiding

belt

10 and 11 guiding in known mode own during drawing-off with the form of the fiber strip or the carded sliver.Clamping line 12 places between bottom roll 6 and pressurization roller 7 finish the drawing-off to fiber strip 8.The fiber strip 13 of having finished drawing-off is then by compressional zone 14, and it is compressed and compacting in this compressional zone.By clamping line 15 gauges, this clamping line is formed by the second pressurization roller 16 with bottom roll 6 configurations at outlet side in the compressional zone.Then after the clamping line 15 fiber strip 13 is being carried out its yarn 17 that twisting is handled and formation is finished.

Drafter 1 can be the part of a weaving loom, for example gives its twisted processing by air nozzle or ring ingot to yarn 17 in this weaving loom.Under the situation of ring spinner, several drafters 1 are provided with abreast and

bottom roll

2,4,6 is configured to along the bottom roll of machine longitudinal extension.This embodiment is shown in Figure 2.In order to improve clearness, in Fig. 2, taken away

pressurization roller

3,5,7 and 16.The pressurization roller of two adjacent drafters is can be in known manner right with the common axis roller that is configured to pressurize.

Arranged compression member 18 in compressional zone 14, it comprises the mechanism that is used to compress drafted fiber strip 13 that the back also will be described in detail.Fiber strip 13 is supported by conveying mechanism 19 in compressional zone 14, because the known fiber strip 13 of twisting that still also do not have of finishing drawing-off has stability hardly.Conveying mechanism 19 is formed by the outer peripheral face of bottom roll 6, and this bottom roll is transported to clamping line 15 with fiber strip 13 from clamping line 12 always.Fiber strip 13 this moment is being pasted volt on conveying mechanism 19 and do not lift from bottom roll 6 constantly between clamping line 12 and 15.

Compression member 18 has the bearing-surface 20 of recessed cylindrical so, and compression member 18 is bearing on the bottom roll 6 by this bearing-surface.Compression member 18 preferably remains in the pressurization roller component 21 that is configured to the compact structure unit and guiding like this with

pressurization roller

7 and 16, makes it not contact pressurization roller 7 and 16.Pressurization roller component 21 keeps with the load bracket of a kind of mode that is not shown specifically by drafter 1.For compression member 18 is bearing on the bottom roll 6 well by its bearing-surface 20, compression member 18 for example can dispose spring 22 or magnet 23.Because the sliding motion between bottom roll 6 and compression member 18 is advantageously selected anti abrasive material pair.Bottom roll 6 is made by hardened steel usually and can additionally be had coating.Compression member 18 preferably can be made by pottery.But also be advantageously, compression member 18 at least at bearing-surface 18 places by the anti abrasive composite manufacturing softer than the surface of bottom roll 6.Under the situation of needs, the compression member 18 that is worn can more easily be changed than the bottom roll 6 that is worn.The composite that can be suitable as compression member 18 well is plastics that a kind of glass fibre is strengthened because compression member this moment can be very simply with cost advantageously as the moulding manufacturing.With the selected material of compression member 18 irrespectively, advantageously, in the material of bearing-surface 20, add the additive that reduces to rub, for example the lining of form for constituting by polytetrafluoroethylene (PTFE).

In life-span for the

pressurization roller

3,5,7 that prolongs drafter 1, reciprocal converting means 24 is set advantageously.Back and forth converting means 24 comprises the carded sliver guider guide rail 25 that is connected with drive unit, and carded sliver guider 9 can pass through the transversely reciprocating motion of this guide rail at throughput direction A, and is such as passing through among Fig. 2 shown in the double-head arrow B.For compression member 18 is located and the life-span of also improving pressurization roller 16 with respect to fiber strip 13 all the time best, compress compression member 18 preferred and reciprocal converting means 24 couplings connection.This coupling connection for example realizes like this that promptly compression member 18 is connected with carded sliver guider guide rail 25 with linking arm 27 by fork 26.Fork 26 can surround linking arm 27 or also elasticity connection seamlessly with certain clearance consciously.Because fork 26 is arranged, pressurization roller component 21 can be taken apart and lift from bottom roll 6 from linking arm 27 in the clear when the load bracket of drafter is rotated.When reinstalling pressurization roller component 21, fork 26 automatically is engaged to again in the linking arm 27 and with the position of compression member 18 corresponding to carded sliver guider 9 and positions.

Compression member 18 with the mechanism 28 that is used for the 14 conpressed fibers yarns 13 in the compressional zone is described according to the zoomed-in view of Fig. 3 below.Shown in situation under, the mechanism 28 that is used to compress is formed by two spigot surfaces 29 and 30.Spigot surface 29 and 30 and throughput direction A arranges tiltingly and with fiber strip 13 bottom roll 6 axially on guiding.Even spigot surface 29 and 30 is to be arranged on the relative side of fiber strip 13, their mode of action is also different with the spigot surface of the known compression member that starts described prior art.The spigot surface of known compression member is simultaneously from both sides conpressed fibers yarn 3, thereby forms a narrow pressure channel between spigot surface, and its determines yardstick of compression, but also being very easy to form simultaneously this moment stops up.In compression member 18 of the present invention, spigot surface 29 and 30 is to arrange like this, make fiber strip 13 can be from spigot surface 29,30 front and back one after the other along different axially the going out of bottom roll 6 from its throughput direction A deflection.Fiber strip 13 at first reach spigot surface 29 and therefrom in according to the view of Fig. 3 from its throughput direction A deflection left.After fiber strip 13 left spigot surface 29, it reached spigot surface 30 and deflection to the right again therefrom.This " the bending-type deflection " of fiber strip 13 be achieved in that promptly, and from the circumferencial direction of the bearing-surface 20 of bottom roll 6 or cylindrical so, two spigot surfaces 29 and 30 have spacing C each other, promptly one after the other arrange before and after their.There is an imaginary circumference 31 that is shown in broken lines in bearing-surface 20 along cylindrical so in Fig. 3, it is completed a business transaction from relative side with 30 by two spigot surfaces 29.31 this moments of imaginary circumference should be just in time extend perpendicular to the axis of bottom roll 6.

The space D of two spigot surfaces 29 and 30 minimum no longer has any influence to the width of the fiber strip 13 of compression.Therefore this space D can be selected widely greater than the width E of the fiber strip 13 at clamping line 15 places, thus the slub that in fiber strip 13, exists, cotton knot and cot part also can waltz through the mechanism 28 and the compression member 18 that are used to compress thus can be not blocked.When space D can be placed obstruction during greater than the width F of the drafted fiber strip 13 at clamping line 12 places especially effectively.

For compression effectiveness key factor be spigot surface 29 and 30 with respect to the inclination angle of throughput direction A and fiber strip 13 bottom roll 6 axially on deflection.The amount of the deflection transversely of fiber strip 13 its throughput direction A is at least its amount of width F at clamping line 12 places.Therefore the fiber of all fiber strips that on width F, distribute 13 can bunchy together.Compression can be supported by the angle [alpha] that correspondingly is chosen between spigot surface 30 and the bearing-surface 20.Can know that in Fig. 4 to see spigot surface 30 directly adjacent with bearing-surface 20.As shown in Figure 4, spigot surface 30 can be perpendicular to the surface arrangement of bearing-surface 20 or bottom roll 6.Being placed in fiber strip 13 on the conveying mechanism 19 is extruded in the corner between spigot surface 30 and the compression member 18 and is compressed there.The face of placing fiber strip 13 on other its be not set on the compression member 18.In order to change compression effectiveness, angle [alpha] also can have less than or greater than 90 ° value.

As shown in Figure 4, in an embodiment of the present invention, bar strip 38 is set on compression member 18, a side of 13 extends to the opposite side of fiber strip 13 always from spigot surface 30 from fiber strip above conveying mechanism 19 for it.In fact bar strip 38 has set up the connection between spigot surface 29 and 30, thereby compression member 18 is single piece.The prior art of being quoted with beginning is different, and this bar strip 38 does not participate in the compression of fiber strip 13.Therefore compression member 18 can be no longer by the slub in the fiber strip 13 from bottom roll 6 lift and by roof pressure to top roller 16.Therefore the height H of spigot surface 30 and certainly also comprise the height of the spigot surface 29 that does not illustrate is preferably greater than the width E of compressed inclination yarn 13.

Should be noted that the reason for the manufacturing technology aspect, the profile 32 of the compression member 18 that spigot surface 29 also can be represented by a dotted line continues.Though form a kind of passage by bar strip 38 between profile 32 and spigot surface 30, this passage does not participate in the compression of compression member 18.At first, spigot surface 29 under any circumstance ends at 33 places, deflection limit, so fiber strip 13 does not contact with profile 32 fully.Secondly, space D and height H are too big, can not produce compression to fiber strip 13.

Different according to the thrust on the hardness of

pressurization roller

7 and 16 elastic overcoat and pressurize roller 7 and the 16 pairs of bottom rolls 6, can influence tensile stress on the fiber strip 13 in the compressional zone 14.By softer overcoat on adopting on the pressurization roller 16 than pressurization roller 7, can in fiber strip 13, produce a little tension force, this tension force can improve compression.Make this fiber strip in compressional zone 14, have the trend of choosing the shortest possible highway section by the little tensile stress in the fiber strip 13.Fiber strip 13 is on the deflection limit 33 that is adjacent under the effect of little tensile stress at the spigot surface 29 and deflection limit 34 of spigot surface 30 and compressed best.Two clamping lines 12 and 15 spacing preferably as far as possible little, especially less than the coarse-fibred average fiber length in fiber strip 13.In order to reduce the spacing of clamping line 15 and clamping line 12, the diameter of the roller 16 that can reduce to pressurize.In order to make that have life-span than the pressurization roller 16 of minor diameter can not become too short and also in order to prevent that fiber strip 13 is wrapped on the pressurization roller 16, as shown in Figure 1, pressurization roller 16 can be furnished with protection belt 35.Protection belt 35 leads by guider and/or tensioning apparatus 36 round pressurization roller 16 with above the pressurization roller, and this device can be installed on the pressurization roller component 21 equally.

In the embodiment that does not illustrate of the present invention, use more than shown in two spigot surfaces 29 and 30 also can be favourable.Can prolong the zigzag deflection of fiber strip 13 and therefore improve compression by additional spigot surface.According to the difference of fibrous material with especially in compressional zone 14, have under the situation of less tension force, only use the spigot surface 30 just may be enough with the deflection limit 34 that is used for conpressed fibers yarn 13.Especially under the situation of having only a spigot surface 30, can make full use of the rolling effect that when the throughput direction upper deflecting comes out, produces at fiber strip fiber strip 13 is compressed.Slight rolling campaign appears in the longitudinal axis around fiber strip 13, because conveying mechanism 19 also continues accurately to move along throughput direction A, even fiber strip 13 transversely being moved by tilting spigot surface 30 at throughput direction A.

Figure 5 illustrates a modification of compression member 18, it can be used to make charging yarn 37.When making charging yarn 37, in fiber mechanism 1, two fiber strips 3 are separated from each other the ground drawing-off and dividually guiding pass through compressional zone 14.After clamping line 15, two fiber strips 13 are flowed to a public twisting mechanism and be woven into charging yarn 37.The mechanism that is used to compress 28 at compression member 18 places that are used for charging yarn 37 similarly constructs as described in each fiber strip 13 with top in principle.Identical Reference numeral is represented identical parts.Therefore can abandon herein whole details is described again.The compression member 18 that is used for charging yarn 37 preferably has at least two spigot surfaces 29,30 and is used for each fiber strip 13.The spigot surface 29,30 that is used for two fiber strips 13 advantageously minute surface arrange symmetrically and be a kind of such mode, promptly the spacing of two fiber strips 13 diminishes up to clamping line 15 from clamping line 12.Two fiber strips 13 should only have very little spacing at clamping line 15 places, and this spacing enough keeps two compressed fiber strips 13 separately.

Claims

1. be used for the coarse-fibred drafter of drawing-off (1), comprise the bottom roll (6) that can drive, wherein this bottom roll (6) disposes two pressurization rollers (7,16), wherein at these two pressurization rollers (7,16) be provided with the mechanism (28) of the machinery that is used for being compressed in the drafted fiber strip (13) of drafter (1) in the compressional zone between (14), and wherein in this compressional zone (14), be provided with and be used to be supported in these two pressurization rollers (7,16) clamping line (12, the conveying mechanism (19) of the fiber strip that will compress (13) 15), it is characterized in that, the described mechanism that is used to compress (28) comprises that at least one is used for pasting the spigot surface (29 of the fiber strip (13) of volt on the circumference of bottom roll (6), 30), this spigot surface (29,30) arrange with respect to throughput direction (A) tiltingly, and by means of this spigot surface (29,30) can make fiber strip (13) along bottom roll (6) axially from its throughput direction (A) deflection amount of its width (F) at least.

2. according to the described drafter of claim 1, it is characterized in that the described mechanism that is used to compress (28) comprises at least two spigot surfaces (29,30), their minimum each other spacings (D) are greater than the width (E) of compressed fiber strip (13).

3. according to claim 1 or 2 described drafters, it is characterized in that, on the relative side of fiber strip (13), respectively arrange a spigot surface (29,30), and this fiber strip (13) can be by one after the other axially going up to come out from its throughput direction (A) deflection the different of bottom roll (6) before and after this spigot surface (29,30).

4. according to claim 1 or 2 described drafters, it is characterized in that the described mechanism that is used to compress (28) joins with a reciprocal converting means (24) coupling of drafter (1).

5. according to claim 1 or 2 described drafters, it is characterized in that at least one pressurization roller (7,16) is gone up round a protection belt (35).

6. the compression member (18) that is used for the drafter of the fiber strip (13) that drawing-off made by crude fibre, the bearing-surface (20) that comprises the recessed cylindrical so of bottom roll (a 6) circumference that is used for drafter (1), and the mechanism (28) that comprises the machinery that is used for being compressed in the drafted fiber strip (13) of drafter (1), wherein this mechanism that is used to compress (28) comprises at least one spigot surface (29,30), this spigot surface is directly adjacent with bearing-surface (20), it is characterized in that, described spigot surface (29,30) arrange with respect to throughput direction (A) tiltingly, and by means of this spigot surface (29,30) can make fiber strip (13) along bottom roll (6) axially from its throughput direction (A) deflection amount of its width (F) at least.

7. according to the described compression member of claim 6, it is characterized in that this mechanism that is used to compress (28) comprises the spigot surface (29 of two reversed dips, 30), and from the circumferencial direction of the bearing-surface of cylindrical so, described two spigot surfaces (29,30) space spacing is arranged (C).

8. according to the described compression member of claim 6, it is characterized in that go up an existence imaginary circumference (31) at the bearing-surface (20) of cylindrical so, this circumference is completed a business transaction by two spigot surfaces (29,30).

9. according to the described compression member of claim 8, it is characterized in that circumference (31) is completed a business transaction from relative side by two spigot surfaces (29,30).

10. according to described compression member one of in the claim 6 to 9, it is characterized in that the spacing (D) of the minimum of described two spigot surfaces (29,30) is greater than by the width (E) with the fiber strip (13) of compression member (18) compression.

11., it is characterized in that the height (H) of described two spigot surfaces (29,30) is greater than by the width (E) with the fiber strip (13) of compression member (18) compression according to described compression member one of in the claim 6 to 9.

12., it is characterized in that, be that each fiber strip (13) is provided with at least two spigot surfaces (29,30) according to described compression member one of in the claim 6 to 9.

13., it is characterized in that the bearing-surface of cylindrical so (20) is made by a kind of composite at least according to described compression member one of in the claim 6 to 9.

14., it is characterized in that this composite comprises plastics and/or glass fibre according to the described compression member of claim 13.