EP1528129B1 - Method and device for treating an advancing yarn with a gaseous or vaporous medium - Google Patents

Abstract

The yarn enters and leaves a pressure chamber (5) through closely fitting passages formed by grooved yarn guides (15, 16) that are pressed against each other by springs or magnets. The passage size is adjusted according to yarn thickness to keep friction low. Within the pressurized zone are forwarding rollers (10, 11) so that treatment by the steam or gas jet (7) takes place under low tension. An independent claim is also included for the corresponding equipment, which provides a seal but allows thick places in the yarn to pass unhindered. It includes devices for threading up with an ejector (9), e.g. spring-loaded cones (18) are actuated by pneumatic pistons (17) to separate the guides (15, 16). An alternative design that uses a single grooved guide block pressed against a stationary wall is also shown.

Description

The invention relates to a method and a device for treating a thread with a gaseous or vaporous medium.

In order to impart certain properties to a yarn, it is known to treat a yarn package or a certain amount of yarn in an open or closed chamber either under atmospheric pressure or under overpressure with a gaseous or vaporous medium adapted to the desired properties.

For a double-twisting spindle, it is out of the DE 28 11 583 C1 it is known to inflate a steam or gaseous treatment medium at atmospheric pressure onto a running yarn by means of a blowing nozzle. From the GB 1 049 947 A For example, a method and apparatus for treating a running yarn with a pressurized gaseous medium is known.

The invention has for its object to provide a method and an apparatus with which it is possible to treat a running thread with a pressurized, gaseous or vaporous medium, as at higher pressure, the medium over the cross section of the thread more dense can bring to the individual capillary when the thread tension is low.

This object is achieved by a method according to claim 1 and with a device according to claim 2.

According to the invention, a yarn treatment chamber, which has a pressure chamber section and is blown into the pressurized treatment medium, upstream and downstream "yarn locks" forward or downstream, in which the current thread itself has the function of a sealing element to an unintentional To prevent leakage of the pressurized treatment medium from the thread treatment chamber as far as possible. The single yarn sluice must be designed so that they can be traversed by thickening of the yarn, for example Knotstellen or the like, while still being given the possibility of a preferably pneumatic Fadendurchfädelung.

Preferred embodiments of the invention are dealt with in subclaims.

• Figur 1 zeigt einen Axialschnitt der erfindungsgemäßen, einem Aufspulaggregat vorgeschalteten Vorrichtung;
• Figur 2 zeigt in vergrößerter Darstellung einen Axialschnitt einer Fadenschleuse der erfindungsgemäßen Vorrichtung;
• die Figuren 2a und 2b zeigen Axialschnitte der Fadenführungselemente gemäß der Linie II-II in Figur 2;
• Figur 3 zeigt einen Axialschnitt einer gegenüber Figur 2 abgewandelten Ausführungsform;
• die Figuren 4 und 5 zeigen Axialschnitte der erfindungsgemäßen Vorrichtung bei Durchlauf einer Fadenverdickung;
• Figur 6 zeigt einen Axialschnitt entsprechend Figur 2 während der Fadendurchfädelung;
• Figur 7 zeigt in vereinfachter isometrischer Darstellung ein nicht zur Erfindung gehörendes Beispiel;
• Die Figuren 8-11 zeigen Längsschnitte der Vorrichtung gemäß Figur 7 in verschiedenen Betriebspositionen;
• Figur 12 zeigt einen Horizontalschnitt entsprechend der Schnittlinie A-A in Figur 10.

The invention will be described in more detail below with reference to the drawings.

• FIG. 1 shows an axial section of the invention, a winding unit upstream device;
• FIG. 2 shows an enlarged view of an axial section of a yarn lock of the device according to the invention;
• the FIGS. 2a and 2b show axial sections of the thread guide elements according to the line II-II in FIG. 2 ;
• FIG. 3 shows an axial section opposite one FIG. 2 modified embodiment;
• the FIGS. 4 and 5 show axial sections of the device according to the invention during passage of a thread thickening;
• FIG. 6 shows an axial section accordingly FIG. 2 during threading;
• FIG. 7 shows in simplified isometric view a non-invention example;
• The Figures 8-11 show longitudinal sections of the device according to FIG. 7 in different operating positions;
• FIG. 12 shows a horizontal section corresponding to the section line AA in FIG. 10 ,

FIG. 1 shows a schematic representation of a side view of a not belonging to the invention Aufwickelaggregats, consisting of a bobbin frame 1 for supporting a bobbin Sp or Sp, a spool Sp driving friction drive roller and a traversing yarn guide. 4

The device according to the invention contains, as part of a yarn treatment chamber x, a pressure chamber section 5 with a connection 6 for injecting a pressurized, gaseous or vaporous treatment medium through a nozzle 7, the outflow opening of which can face a baffle surface 8. The yarn treatment chamber 2 is provided with diametrically opposed inlet and outlet openings, in the sealing thread locks A and B are used, which are identical to each other in essentials, with the exception that the lower yarn lock B a Druckluftinjektor 9 for threading through a thread the yarn locks A and B and the yarn treatment chamber 2 is assigned. Within the yarn treatment chamber 2, two yarn delivery mechanisms 10 and 11 shown schematically are arranged in order to convey the yarn F substantially stress-free through the yarn treatment chamber 2 and the pressure chamber section 5.

• einen in eine untere oder obere Öffnung der Fadenbehandlungskammer 2 abdichtend eingesetzten Anschlußstutzen 12;
• ein an den Anschlußstutzen 12 angesetztes Zylindergehäuse 13;
• einen in das Ende des Zylindergehäuses 13 eingesetzten Rohrstutzen 14;
• zwei innerhalb des Zylindergehäuses 13 untergebrachte, längliche Fadenführungselemente 15, 16 mit im wesentlichen halbkreisförmigem Querschnitt, von denen gemäß den Figuren 2a und 2b mindestens eines eine in Längsrichtung verlaufende Aussparung 16.1 bzw. 15.1 zur Bildung eines Fadenkanals aufweist;
• einen innerhalb des Zylindergehäuses 13 verschiebbaren Kolben 17;
• eine den Kolben 17 abstützende Rückstellfeder 18;
• eine die Fadenführungselemente 15, 16 abstützende Rückstellfeder 19;
• eine die beiden Fadenführungselemente 15, 16 gegeneinander drückende Ringfeder 20, die auch ein O-Ring sein kann;
• sowie übliche Dichtungselemente, beispielsweise in Form von Ringdichtungen 21.

According to the FIGS. 1 and 2 each of the yarn slivers A and B consists of the following parts:

• a connecting pipe 12 sealingly inserted into a lower or upper opening of the yarn treatment chamber 2;
• a attached to the connecting piece 12 cylinder housing 13;
• a pipe socket 14 inserted into the end of the cylinder housing 13;
• two housed within the cylinder housing 13, elongated thread guide elements 15, 16 having a substantially semicircular cross-section, of which according to the FIGS. 2a and 2b at least one has a longitudinally extending recess 16.1 or 15.1 for forming a thread channel;
• a displaceable within the cylinder housing 13 piston 17;
• a piston 17 supporting the return spring 18;
• a thread guide elements 15, 16 supporting the return spring 19;
• a two thread guide elements 15, 16 against each other oppressive ring spring 20, which may also be an O-ring;
• and conventional sealing elements, for example in the form of ring seals 21st

The connecting piece 12 is in the in FIG. 2 shown lower yarn lock B provided with a downwardly projecting centering and expanding cone 12.1. The piston 17 is provided on its upper side with an upwardly projecting centering or expanding cone 17.1. The two thread guide elements 15 and 16 are designed at their upper and lower ends so that they together define a substantially conical inlet or outlet opening into which the centering or expanding cones 12.1 and 17.1 protrude or due to the resilient support on the one hand the thread guide elements 15, 16 and on the other hand of the piston 17 are retractable.

The embodiment according to FIG. 3 differs from the embodiment according to FIG. 2 in that instead of an annular spring 20, opposing magnets 22 are provided to press the two yarn guide elements against each other.

• Reibungsarm und verschleißfrei;
• Knotendurchlässigkeit ohne merkliche Fadenspannungserhöhung;
• gute Einfädelbarkeit für einen Faden;
• Abdichtung des Behandlungsraumes zur Atmosphäre, um unbeabsichtigte Verluste an Behandlungsmedium (Dampf, spezielle Gase, Druckluft) möglichst gering zu halten.

The thread locks must have special features:

• Low friction and wear-free;
• Knot permeability without noticeable increase of thread tension;
• good threadability for a thread;
• Sealing of the treatment room to the atmosphere in order to minimize accidental losses of treatment medium (steam, special gases, compressed air).

The thread channel formed by the two preferably ground thread guide elements 15, 16 has a Fadendurchlaßquerschnitt, which corresponds substantially to the titer or the cross section of the textile thread to be processed. By this measure, the continuous thread substantially closes the thread channel for the pressurized treatment medium, so that only minimal losses of treatment medium occur. The overpressure of the still flowing with the thread through the thread channel treatment medium, the two thread guide elements 15, 16 do not press apart, since the effective pressure surface is very low, essentially limited to thread diameter times the length of the yarn passage. This pressure counteracts the two guide elements 15,16 cohesive annular spring. Instead of an annular spring, an O-ring or magnets 22 (FIG. FIG. 3 ) be provided.

The continuous thread is centered between the two guide elements, as he seeks the path of least frictional resistance. As a result, no Faserkapillare between the thread guide elements 15, 16 are clamped.

The two thread guide elements are centered in the continuous thread over the two lower and upper centering or expanding cone 12.1 and 17.1, in cooperation with the conical inlet and outlet openings at the upper and lower ends of the thread guide elements.

According to the FIGS. 4 and 5 opens a passing through the thread lock B node (thickening) the thread channel between the two thread guide elements, which are pressed against the force of the annular spring 20 (or the magnets 22) to the outside. The occurring, small lateral pressure medium losses during knot run are negligible. After passing through the knot through the "yarn sluice" the thread channel is closed again.

The during the opening of the thread channel for a short time acting on the increasing separation surfaces of the thread guide elements pressure of the treatment medium does not affect, since this pressure builds up accordingly on the outer sides of the two thread guide elements.

For threading the thread through the two yarn locks the thread guide elements 15, 16 are pushed by the piston 17 against the force of the return spring 19 upwards when the piston 17 is acted upon by the compressed air connection 23 with compressed air. As in FIG. 6 shown, the two centering or expanding cone 12.1 and 17.1 are retracted into the conical inlet or outlet openings, whereby the two thread guide elements 15, 16 are pressed apart over their entire length, so that a sufficiently large opening cross-section for the pneumatic Fadendurchfädelung is present. For Fadendurchfädelung the Druckluftinjektor 9 is applied in a known manner with compressed air to produce an effective in the field of yarn locks A and B and the pressure chamber 5 suction flow.

After threading the thread of the piston 17 is depressurized, so that the two thread guide elements 15, 16 and the piston 17 are returned to their original position.

The two thread guide elements 15, 16 of the lower yarn lock B are supported with their lower ends on an annular shoulder of the housing 13.

In the in the Figures 7-12 illustrated example not belonging to the invention, the individual thread lock a first thread guide member 51 in the form of a polygonal bar, preferably square bar, on whose longitudinal edges are flattened at different distances to the groin axis. The second thread guide element consists of two angularly mutually arranged support surfaces 52.1; 52.2, against which are located between the flattened edges outer surfaces of the square bar 51 by means of, for example, a spring 55 acting on a spring 54.

The two support surfaces 52.1; 52.2 are part of a support block 52, the additional lower and upper seats 52.3; 52.4, between which the square bar 51 in the in FIG. 9 shown operating position by means of sealing rings 60, 61 is supported. The square bar is provided at its lower end with a center hole to the eccentric blind bore 51.1 and at its top with a bore 51.1 axially aligned blind bore 51.2. The holes 51.1 and 51.2 are coaxially aligned with each other support pins 62 and 63, whose projecting into the holes 51.1 and 51.2 ends have substantially the shape of a cone. The axes of the pins 62, 63 are eccentric to the axes of the two blind holes 51.1, 51.2. A force acting on the underside of the square bar 51 compression spring 64 presses the square bar 51 in the in the Figures 9 and 10 shown operating positions against the upper sealing ring 61st

At the one part of the yarn treatment chamber 2 forming, equipped with thread feeders pressure chamber 59 includes a guided through the support block 52 thread channel 65, in the lower region of the support block 52, starting substantially opposite the bottom seat 52.3, axially aligned a thread channel 66. The two thread channels 65, 66 open into the thread channel 67 formed by the two support surfaces 52.1, 52.2 and the opposite flattened edge of the square strip 51.

On the support block 52 are for sealing the gap between the square bar 51 and the support surfaces 51.1; 51.2 sealing elements 53 preferably arranged in the form of sealing tabs.

The spring or an analogous element 54 is designed so that a rotation of the square bar 51 about the pins 62, 63 is possible, for which it is a prerequisite that the projecting into the bores 51.1 and 51.2 of the square bar 51 sections of the two pins 62, 63 have a defined, smaller diameter than the holes 51.1 and 51.2 themselves, so that the square bar 51 can dodge sideways when rotated about the pins 62, 63.

The upper pin 63 carries a piston 63.1, which is sealingly guided in a cylinder chamber 68, in which a pressure medium connection 69 opens. Upon actuation of the cylinder chamber 68 with pressure medium of the piston 63.1 and thus the pin 63 are pressed against the force of a return spring 70 downward, thereby simultaneously the square bar 51 is adjusted against the force of the lower return spring 64 downward. Since the axes of the pins 62, 63 laterally offset from the axes of the bores 51.1; 51.2 are away from the through the support surfaces 52.1; 52.1 formed corner, the square bar 51 is moved away from the center of the cone-shaped ends of the pins 62, 63, whereby the thread channel 67 is increased for the purpose of Fadendurchfädelung.

The square bar 51 can according to FIG. 11 When retracted into the cylinder chamber 68 pin 63 by hand laterally swung out of the support block 52, for which the lower sealing ring 60 must have sufficient elasticity. In this way, it is possible to exchange square bars with differently flattened edge dimensions against each other. This exchange is not to be confused with the example of FIG. 12 apparent turning a square bar 51 to bring different flattened longitudinal edges of one and the same square bar 51 in juxtaposition with the formed by the two support surfaces 52.1, 52.2 corner.

FIG. 9 shows the thread-handling chamber 59 leaving thread F, which, as in the case of the device according to the Figures 1-6 , the thread channel 67 formed between the two support surfaces 52.1, 52.2 and the square bar 51 seals. At the inlet end of the treatment or pressure chamber 59 is a corresponding system, as shown in the Figures 7-12 described, attached.

In order to prevent damage to the thread when entering a thread thickening Fn in the thread channel 67 and to facilitate threading a thread into the thread channel 67, the flats of the square strip 51 are chamfered inwardly in the region of at least one end face of the square strip 51.

LIST OF REFERENCE NUMBERS

A + B

thread locks

1

Coil support frame

2

Kitchen sink

3

drive roller

4

Traversing thread guide

5

pressure chamber

6

Compressed air inlet

7

jet

8th

baffle

9

compressed air injector

10 + 11

Yarn feeding stations

12

connecting branch
12.1 spreading cone

13

cylinder housing

14

pipe socket

15

Thread guiding element
15.1 groove

16

Thread guiding element
16.1 groove

17

piston

18

Return spring

19

Return spring

20

Ringfeder

21

ring seal

22

magnets

23 24

Compressed air inlet

25

thread return roller

51

Polygonal square bar

51.1 / 2

blind holes

52

mounting block

52.1; 52.2

support surfaces

52.3; 52.4

lower / upper seat

53

spring elements

54

Spring - tension spring

55

lever

59

Pressure chamber portion

60.61

seals

62

support posts

63

Retaining plug 63.1 Piston

64

compression spring

65

thread channel

66

thread channel

67

thread channel

68

cylinder chamber

69

Fluid port

Claims (10)

1. Method for treating a yarn with a gas or steam-like medium, wherein the yarn is run through a yarn channel arranged between two elongated yarn guiding elements (15, 16; 51, 52 or 51, 52.1, 52.2) which are adjustable relative to one another against spring or magnetic force into a pressure chamber section (5) of a yarn processing chamber (2; 59) sealed essentially from the environment, to which chamber the gas or steam-like medium is supplied under excess pressure, and wherein the yarn is then drawn out through an additional yarn channel attached between two elongated yarn guiding elements (15, 16; 51, 52) adjustable relative to one another against spring or magnetic force, characterised in that the cross section of the two yarn channels are adjusted to the thickness or titre of the yarn, such that the yarn runs through said channels in an essentially non-frictional manner and seals largely against losses in pressure from the yarn processing chamber, and in that the yarn is run essentially without tension through the yarn processing chamber and the pressure chamber section, in that the yarn is guided through two yarn supplying devices inside the yarn processing chamber.
2. Device for processing a running yarn with a gas or steam-like medium for performing the method according to claim 1, comprising a yarn processing chamber (2; 59) to be run through by the yarn which is sealed substantially from the environment, which yarn processing chamber is provided with a yarn inlet opening and a yarn outlet opening, wherein each of said openings is assigned a yarn lock (A or B), which comprises elongated yarn guiding elements (15, 16) delimiting in longitudinal direction a yarn passing channel, of which at least one yarn guiding element can be adjusted relative to the other yarn guiding element against a restoring force essentially perpendicular to the yarn running direction, such that the yarn lock allows on the one hand the passage of the yarn including yarn thickenings but on the other hand seals the respective opening largely from the atmosphere by inclusion of the yarn running through the yarn lock, and wherein the yarn processing chamber (2 or 59) comprises a pressure chamber section (5; 5) with a connection (6) for feeding the pressurised medium, characterised in that the two yarn guiding elements (15, 16) have in particular a semi-circular cross section, wherein at least one yarn guiding element (15 or 16) in the region of the contacting separating surfaces of the two yarn guiding elements (15, 16) comprises a recess (15.1 or 16.1) running in longitudinal direction, the cross section of which is adjusted to the thickness or titre of the yarn to be processed, in that the two yarn guiding elements (15, 16) are mounted displaceably inside a cylinder housing (13) against spring force, and in that in the region of the yarn inlet and yarn outlet sides of the yarn guiding elements (15, 16) centring and spreading devices are provided, by means of which the two yarn guiding elements are moved apart from one another when displaced against spring force.
3. Device according to claim 2, characterised in that each centring and spreading device in the region of the separating surfaces of the two yarn guiding elements (15, 16) comprises a conical bore which is concentric to the yarn passing direction and tapers from the outside to the inside and a truncated cone (12.1 or 17.1) which tapers in the direction of the two yarn guiding elements (15, 16), of which one truncated cone (17.1) can be displaced relative to the other truncated cone (12.1).
4. Device according to claim 2, characterised in that each displaceable truncated cone (17.1) is part of a piston (17) guided in a cylinder bore, which piston in the region of the truncated cone comprises an annular shoulder for the temporary support of one of the yarn guiding elements and can be displaced against the force of a restoring spring (18) in the direction of the assigned yarn guiding element.
5. Device according to claim 4, characterised in the yarn guiding elements (15, 16) can be displaced against the force of a restoring spring (19) in the direction of the pressure chamber.
6. Device according to claim 2, characterised in that the two yarn guiding elements (15, 16) are pressed against one another by means of at least one O-ring (20).
7. Device according to claim 2, characterised in that the two yarn guiding elements can be pressed against one another by means of at least one spring, in particular an annular spring.
8. Device according to claim 2, characterised in that the two yarn guiding elements are held together magnetically.
9. Device according to one or more of claims 2-8, characterised in that yarn supplying devices (10; 11) are arranged inside the yarn processing device, in order to convey the yarn substantially without tension through the yarn processing device.
10. Device according to one or more of claims 2-9, characterised in that a suction air source, preferably in the form of a compressed air activated injector (9) is assigned to the yarn lock arranged on the outlet side relative to the yarn processing device.

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