EP1026293A1 - Fibre feed tube for opened fibre material - Google Patents

Abstract

The fiber feed tube (8), to carry loosened fibers in a pressure or suction carrier air flow to a spinning station, has a curvature over a part of its length. The ratio of the direction change angle to the curvature radius (r) of the tube center line is alpha divided by r=2.5 to 3.5. The curvature radius (r) has a value of 30-40 mm, and preferably 35 mm. The direction change angle ( alpha ) is 95-105 degrees and preferably 98.8 degrees . In the curved section, the inner diameter. of the fiber feed tube (8) reduces steadily from 8 mm to 6 mm.

Description

The invention relates to a fiber feed tube for dissolved Fiber material that deviates from a straight line Has course.

DE 37 34 544 C2 deals with a fiber material dissolving unit and an OE spinning rotor feed channel, the one angled only slightly deviating from a straight line Shape. A first length section of this channel tapers itself in the direction of fiber transport, causing the fiber transporting air is accelerated, which at the same time the fibers floating in it accelerated, making them both stretched as well as parallelized. Because the fibers are one have greater inertia towards the air, they can in this not reach the same speed in the first length section, like the air they carry. For this reason joins the first, tapered length section at an obtuse angle an essentially cylindrical one Longitude at which the air changes its speed not changed significantly while the fibers in this Longitudinal section experience a post-acceleration. The fibers have while adapting to the air speed Opportunity to calm down in their situation. Overall is the fiber feed channel designed so that the fibers on their Away from the fiber material disintegration unit into the spinning rotor experience the least possible redirection.

Since this known fiber feed pipe only one possible minor redirection, it is not for the cases suitable where the fiber to be connected or fiber processing machines, for example, to save space or maintenance reasons above or below each other should be arranged, as is the case with combined integrated spinning / twisting processes, as is particularly the case with one described in DE 43 31 801 C1 Device for making a thread in an integrated Spinning-twisting process would be desirable, as in Individuals are briefly described in the following description of the figures becomes.

The invention has for its object a fiber feed tube for dissolved fiber material so that the fiber material conveyed through the tube by means of an air flow undergoes a change in direction that is greater than the change of direction according to DE 37 34 544 C2.

The features of the claim serve to solve this problem 1.

Preferred further developments are in subclaims 2 treated to 4.

Figur 1

zeigt eine perspektivische Ansicht einer Doppeldraht-Zwirnspindel mit in die Spindel integrierten Spinnrotoren;

Figur 2

zeigt auszugsweise und teilweise im Schnitt die Doppeldraht-Zwirnspindel;

Figur 3

zeigt eine Schnittansicht des erfindungsgemäß verwendeten Faserspeiserohres.

The invention is described below with reference to the drawing.

Figure 1

shows a perspective view of a double-wire twisting spindle with spinning rotors integrated into the spindle;

Figure 2

shows excerpts and partially in section the double-wire twisting spindle;

Figure 3

shows a sectional view of the fiber feed tube used according to the invention.

Figure 1 shows as part of a combined double-wire spinning twisting machine extracts from a single double wire twist spindle A, which is represented by its outer housing 2. The center axis of the twisting spindle or the outer housing 2 is compared to the vertical at an angle of 68-76 °, preferably 72 ° sloping on the detail shown Machine frame 1 attached. Because of this inclination the double wire twisting spindle becomes the operation of the same and performing maintenance work after acceptance the housing cover 2.1 facilitated, as well as the total height of the Machine lowered.

The double wire twisting spindle A is a fiber material dissolving unit B upstream, the two essentially schematic shown fiber material dissolving units 3, which by means of the usual feed rollers 4 slivers FB from cans 5 are supplied. Follow each of the two feed rollers 4 Fiber material dissolving rollers, of which for the left shown dissolving unit 3, the one dissolving roller 7th is shown schematically.

In the housing 6 of the fiber material dissolving unit B are two (not shown) drive motors housed, namely one for each of the two feed rollers 4 and one for the two dissolving rollers 7.

Each resolution unit 3 is via a fiber feed tube 8 to the double-wire twisting spindle A or to the housing 2 connected to resolved in the manner shown in Figure 2 Fiber material in the inside of the double wire twist spindle to supply stored OE spinning rotors 9. Of the two arranged axially symmetrically in the double wire twisting spindles Spinning rotors is only one, i.e. the left-hand spinning rotor 9 shown.

In the section shown in particular in Figure 2 Double-wire twisting spindle B with integrated spinning rotors 9 is a common combined spinning and twisting system, as described in DE 43 31 801 C1.

In this known combined spinning-twisting process under The basic idea is to use a double wire twisting spindle in that rotating into the twist spindle Thread balloon introduced fiber material directly for production a thread made from at least two threads. The Fiber material is fed into the spinning rotor so that it on the one hand not disturbing the balloon and on the other hand enough Space is available to be within that defined by the string balloon Space several spinning units, preferably in the form of OE spinning rotors to accommodate whom the fiber material in separate Streams is supplied. The ones pulled from the spinning rotors Spinning threads pass through the hollow spindle axis and the Thread balloon. The two spinning rotors and their drive mechanisms take the usual two-wire twisting process previously taken up by the necessary supply spools Space.

Referring to the representation of Figure 2 is for each spinning rotor 9 fiber material through through the thread balloon or a thread guide tube 10 corresponding to the thread balloon Envelope fed to the interior of the spindle. The two spinning rotors are counter to the direction of rotation by an electric motor of the spindle rotor of the double-wire twisting spindle. Out A spinning thread F1, F2 is drawn upward from each spinning rotor and the hollow axis 10 of the double-wire twisting spindle. The thread guided downwards by the spindle hollow axis 10 then through the usual thread guide channel (not shown) conveyed radially outwards and along the with the spindle rotor co-rotating thread guide tube 10 upwards deflected and to a center of the housing cover 2.1 located centering eyelet 2.1 and then over a pulley 11 to the take-off unit 12 and further to a conventional thread winding unit C promoted.

Instead of a thread guide tube 10, the balloon thread can also along a usual one with a double wire twisting spindle Balloon delimiter.

In this known spinning and twisting process either cuts through the balloon thread or the thread guide tube 10 in its upper Range once with each turn through the respective fiber feed tube 8 fed fiber stream through a subsequent Fiber material feed channel 13 immediately in the spinning rotor 9 is fed.

The feeding or feeding of the dissolved fiber material to or into the OE spinning rotors 9 takes place according to DE 43 31 801 C1 by means of negative pressure, which in the area of the spinning rotors by an in Suction tube extending in the area of the spindle hollow axis is connected to a suction source at its outer end is. Air channels are connected to the inner end of this suction pipe, which are guided so that they are in the fiber material feed pipes the spinning rotor in the direction of the fiber feed negative, the fiber feed to the spinning rotors build up the pressure gradient.

It is again pointed out that the invention not on the concept and construction of the combined or integrated spinning twisting device, but exclusively on the concept of fiber material feed to in from the outer housing 2 of the double-wire twisting spindle A surrounding space.

This concept essentially consists of the individual Double wire twisting spindle A a fiber material dissolving unit B in a confined space so that one hand reliable fiber material feed into the inside of the Double-wire twisting spindle arranged spinning rotors and on the other hand easy access to the double wire twisting spindle is guaranteed, on the other hand that Fiber material dissolving unit with as few drive elements as possible should be equipped.

This provides optimal access to the double wire twisting spindle achieved that the central axis of the individual double wire twisting spindle A with respect to the vertical at a certain angle is inclined so that after removing the housing cover 2.1 undisturbed access to the inside of the double-wire twist spindle is possible. As a result of the inclination of the double wire twisting spindle is below the same room for attachment of the fiber material dissolving unit B, the two dissolving units 3 by means of the fiber feed pipes 8 to diametrically opposite points to the outer housing 2 of the Double-wire twisting spindle A are connected. The two fiber feed pipes 8 each have one for this purpose Section of curvature with a direction change angle α in of the order of 95 to 105 ° and one through the pipe center line drawn radius of curvature r in the order of magnitude from 30 to 40 mm. To ensure optimal alignment of the to ensure the fiber feed pipes 8 flowing fibers the fiber feed pipe behaves in the area of its circular arc curvature such that the inner tube diameter at the beginning of the Curvature preferably 8 mm and preferably at the end of the curvature Is 6 mm. The diameter is reduced linear or continuous.

With such a dimensioning of the fiber feed pipe 8 especially in the area of circular curvature lose the Detachment vortices and secondary currents, in particular, which arise in the area of the inner curvatures during fiber material transport largely their negative effects.

Claims (4)

Fiber feed pipe for by means of compressed or suction air flow dissolved fiber material conveyed through the tube, which is one of one along its length Straight line has a different shape, characterized in that the fiber feed pipe (8) over part of its length follows a curvature of a circle, and that the direction change angle to the radius of curvature (r) of the pipe center line in has a ratio of α / r = 2.5 - 3.5. Fiber feed pipe according to claim 1, characterized in that the radius of curvature r is a size of 30 to 40 mm, preferably Has 35 mm. Apparatus according to claim 1, characterized in that the Direction change angle α in the range of 95 to 105 °, preferably 98.8 °. Fiber feed pipe according to claim 1, characterized in that there is a constant of 8 mm in the area of curvature 6 mm tapered inside diameter.

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