CN101374982A

CN101374982A - Air jet spinning frame

Info

Publication number: CN101374982A
Application number: CNA2005800357304A
Authority: CN
Inventors: G·斯塔莱克
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2004-10-19
Filing date: 2005-10-18
Publication date: 2009-02-25
Also published as: JP2008517169A; WO2006042738A1; DE102004052206A1; EP1802791A1; US20080115476A1

Abstract

An air jet spinning frame contains a substantially hollow cylindrical turbulence chamber whose circumferential wall forms in the staple sliver entry region a support surface for a circumferential surface of a rotationally symmetrical insert. A plurality of air slots are formed in the circumferential surface of the insert and form closed pressurised air ducts when completed by the support surface. The nozzle-like openings of the pressurised air ducts are arranged in the front side of the insert which faces the turbulence chamber. According to the invention, the air slots are arranged in the form of a multiplex thread.

Description

Air jet spinning device

The present invention relates to a kind of air jet spinning device that is used for making a spinning yarn by ribbon, it has one and is the minor air cell of hollow cylinder substantially, its circumferential wall comprises a bearing-surface in the entry site of ribbon, it is used for the periphery of rotational symmetric insert, wherein in periphery, process a plurality of nozzle slots, they replenish the complete compressed air channel that becomes sealing by bearing-surface, the nozzle-like aperture arrangement of these compressed air channels insert on the end face of minor air cell.

Compressed air channel should be incorporated into air-flow in the minor air cell with being orientated like this in air jet spinning device, makes to form a kind of air-swirl therein, and it helps to twist for spinning yarn fatefully.If compressed air channel is a tangential component when entering into the minor air cell with one fully, that has just reached the situation of energetics the best.

The compressed air channel hole that just gets beat up before usually.Because these holes have very little diameter-from 0.5 to 0.6mm and owing to its length of hydraulically operated reason is necessary for 3mm at least, therefore between the length in hole and its diameter, form a kind of ratio, this ratio is greater than 5.Be meant normal deep hole drilling about processing, they are difficult to carry out comparatively speaking.If these holes not only should tangentially but also with another kind of component also become axially with it to extend with respect to yarn moves, this has just increased difficulty so.

Become known for the compressed air channel of air jet spinning device by DE 37 32 708 A1, they are worked in the circumferential wall of a member as open slot, and just just replenish the complete described compressed air channel that becomes by by another member groove being covered when assembling.For example in known devices, on the conical surface, process the straight line open slot, and cover by the conical surface of a respective shapes is additional.Can realize by way of parenthesis by the skew of open slot: a kind of more or less bigger air-swirl of effect on yarn with respect to yarn.

The compressed air channel of last described pattern has the following advantages: they can make by very simple mode no problemly.Because compressed air channel exposed with the form of nozzle slot before assembling, therefore can also check their precision easily, and carry out fine finishining where necessary.When this inspection, also wrong segment section can be rejected.

Task of the present invention is, the nozzle passage of air jet spinning device is proposed to be used on the basis that keeps by the advantage of DE 37 32 708 A1, they also further are optimized, and by its nozzle-like opening the compressed air that causes spinning twisting are flow in the minor air cell with a kind of big as far as possible tangential component.

This task solves as follows: nozzle slot constitutes by a kind of multiple-threaded pattern.

Because the nozzle slot of this shape-if they would be passed in the end face of insert-would have a part on the direction of motion of the yarn that is produced; And, therefore formed best nozzle passage only not in addition because its thread-like structure profile has a significant part on the circumferencial direction of minor air cell.Describedly comprise multiple-threaded insert and be pressed into aptly in the hole that is comprising bearing-surface, therefore realizing good sealing simultaneously.

Here should mention clearly: should protect simultaneously counter motion simultaneously in the present invention's design, this moment, the nozzle slot according to a kind of multiple thread form did not make in described insert, and was arranged in the bearing-surface that surrounds insert yet.

If screw thread is worked into one to be designed in the cylindrical periphery, this design is exactly simple especially so.Itself also can be more or less taper or spherical periphery, but the processing of cylindrical shape be easy especially.Cylindrical shape can also make insert move in the axial direction in certain limit, has so just changed the height of minor air cell, and this characteristic for spun yarn is influential.

The described multiple-threaded degree of depth that has formed nozzle slot can change on the length of nozzle slot fully.Can make this nozzle passage thus, wherein the depth of thread narrows down from inlet to outlet.If for example will produce a kind of effect of Laval nozzle, nozzle slot can be expanded towards outlet conversely so.

The nozzle slot shape considered to some extent all when assembling by replenished complete nozzle passage by means of the covering of bearing-surface for finishing.

The visible following explanation of other advantage of the present invention and feature to an embodiment.Accompanying drawing is depicted as:

Fig. 1 amplifies the axial cutaway view of the air nozzle assembly of having represented a kind of air jet spinning device;

Fig. 2: the view that does not dissect part of the further amplification of insert shown in Figure 1, wherein the bearing-surface of nozzle slot by the minor air cell that is machined in the circumferential wall as multiple thread covers,

Fig. 3: the view on arrow III direction shown in Figure 2.

Air jet spinning device according to Fig. 1 comprises a feeder 1 and an air nozzle assembly 3 that is used to import the ribbon 2 that will spin, and adds for spinning the yarn 4 necessary twists in this air nozzle assembly ribbon 2.

Feeder 1 comprises a feed roller to 5,6, and it was deployed before air nozzle assembly 3 with less distance, and for this feed roller concerning can refer to a unshowned in addition drafter.The ribbon that a kind of like this drafter stretches in known manner and imported perhaps also can be drawn into a kind of rove a kind of ribbon 2 of desired fineness.Yet feeder 1 pinch roll alternatively another kind of drawing mechanism or a kind of other preposition assembly is right.Express clamping lines, clamped fixing before the above ribbon of having imported along direction of the supply A 2 of this clamping lines is entering into air nozzle assembly 3 with 7.Air nozzle assembly 3 is by being wanted spun yarn 4 to twist, and exports on the yarn pull-out direction making yarn 4 by means of a unshowned pull-out roll.

Air nozzle assembly 3 also comprises a fiber input channel 8 and one and is the minor air cell 9 of hollow cylinder substantially.9 li in the minor air cell of a kind of hydraulic mechanism produce a kind of eddy current by the compressed air channel 10 that compressed air is blasted through being passed into 9 li of minor air cells.These compressed air channels 10-they according to after the design of the present invention by Fig. 2 and 3 can explain detailedly-from an annular chamber 11, this annular chamber is connected with a compressed air joint 12.Compressed-air actuated inflow direction marks with C.The compressed air of described 13 li outflows of nozzle-like opening from compressed air channel 10 is through 14 outputs of an air exhaust passage, and this air exhaust passage surrounds a spindle shape member 15 circlewise.Be provided with a yarn 15 li of this spindle shape members and pull out passage 16.

The arris 17 that is provided with a fibre guide face 18 in the end regions of fiber input channel 8 is as resistance twist mechanism (Drallsperre), and this arris 17 is pulled out passage 16 for yarn and is positioned at prejudicially in the zone that enters hole 19 of this passage.

3 li of air nozzle assemblys, make the fiber that will spin be fixed on 2 li of ribbons on the one hand, and therefore twisting being incorporated into yarn does not pull out 16 li in passage basically from fiber input channel 8; Fiber is subjected to the effect of eddy current in fiber input channel 8 and yarn are pulled out zone, position between the passage 16 but then, by the effect of this eddy current or at least the perforate 19 that enters of pulling out passage 16 of its end from yarn radially pushed through.Therefore the yarn made like this 4 is the fiber that extends on the yarn longitudinal direction basically or a core at fiber position, but does not have big twisted; The described yarn of making also have one the outside position, in this position fiber or fiber position round described core around by twisted.

Obviously, if compressed air stream " as far as possible tangentially " enters into minor air cell 9, so described eddy current just has a kind of effect of the best.But simultaneously should have a kind of significant component on yarn is pulled out the direction of passage 16, so that fiber input channel 8 is executed a kind of jet action, this effect is useful for holding ribbon 2.Although describedly also should satisfy to compressed air channel 10 requirement appearance and sizes are very little.

In order to reach this purpose, be provided with a rotational symmetric insert 20, be used to constitute compressed air channel 10, this insert utilizes its periphery 21 to be inserted into 22 li of the circumferential wall of a corresponding coupling of minor air cell 9.This circumferential wall 22 is positioned at 23 li at the inlet position of minor air cell 9 in this case.Process the nozzle passage 10 of nozzle slot 24 forms 20 li of inserts, these nozzle slots replenish complete compressed air channels 10 for sealing by circumferential wall 22 after assembling.This is illustrated by Fig. 2 and 3 following.

Fig. 2 and 3 strong amplify and is not illustrated in rotational symmetric insert 20 in circumferential wall 22 positions of described minor air cell 9 with dissecing.Periphery at insert 20 is processed with four nozzle slots 24 for 21 li, according to a kind of form of four-start spiral, for example forms by turning on a lathe in other words.The nozzle-like opening 13 that described circumferential wall 22 by minor air cell 9 is replenished complete compressed air channel 10 is arranged on the end face 25 of sensing minor air cell 9 of insert 20.

Such just as can be seen, nozzle slot 24 starts from described annular chamber 11 and feeds on the end face 25 of insert 20.Select the helical pitch of screw thread like this, make a kind of significant component that on the traffic direction of yarn 4, has described compressed air stream.Can see, in design, also form a kind of significant compressed air component consumingly, its circumferential wall 22 rotation of 9 along the minor air cell according to a kind of nozzle slot 24 of multi-head spiral form.

The degree of depth of screw thread can remain unchanged on the length of nozzle slot 24, but it can, if desired, strengthen or reduce.

Claims

1. be used for making the air jet spinning device of spinning yarn (4) by ribbon (2), has a minor air cell (9) that is essentially hollow cylinder, its circumferential wall (22) has a bearing-surface to be used for the periphery (21) of a rotational symmetric insert (20) in entry site (23) lining of ribbon (2), wherein be processed with a plurality of nozzle slots (24) in periphery (21) lining, they replenish complete compressed air channel (10) for sealing by bearing-surface, the nozzle-like opening (13) of this compressed air channel is arranged on the end face towards minor air cell (9) (25) of insert (20), it is characterized in that nozzle slot (24) constitutes according to a kind of multiple-threaded form.

2. by the described air jet spinning device of claim 1, it is characterized in that it is processed that described screw thread constitutes cylindrical periphery (21) lining at one.

3. according to claim 1 or 2 described air jet spinning devices, it is characterized in that the degree of depth of screw thread changes on the length of nozzle slot (24).