EP2301671B1 - Nozzle strip for a textile processing machine - Google Patents

Description

The invention relates to a nozzle strip for a textile processing machine.

For the consolidation of nonwovens textile processing machines are known in which water is ejected under high pressure in very fine thin jets on a random fiber fabric. The water jets here take over the function of felting needles and devour the fibers of the random fiber fabric together to produce a solid nonwoven fabric.

The textile machine has for this purpose a nozzle strip, which contains a plurality of nozzle openings, through which the water is formed into fine, needle-like water jets. The nozzle openings are exposed to a very high load, since the water can stand under high pressure of several hundred bars. They are therefore subject to considerable wear.

From the WO 2006/063112 A1 a nozzle strip is known which has a carrier element with cylindrical or conical bores. Separately, a strip-shaped cover member is provided which includes a plurality of nozzle openings. Each nozzle opening is arranged in the position of use in alignment with a bore of the carrier element. Via the nozzle openings in the cover, pressurized water is supplied and formed into a fine jet, which then exits through the holes in the support member from the nozzle strip.

Furthermore, the describes US 7237308 B2 a nozzle strip, in which also a carrier element and separately therefrom a positioning strips are present. Here, too, cylindrical bores are present in the support element, each of which is aligned with a nozzle opening in the positioning strip. The positioning strip can be divided into several segments, so that not a single positioning strip with all the nozzle openings, but a plurality of positioning strips are provided, each having a portion of the nozzle openings.

Based on this, it can be regarded as an object of the present invention to improve the known nozzle strip.

This object is achieved by a nozzle strip with the features of claim 1.

The nozzle strip according to the invention has a carrier element into which a fluid channel having an inlet and an outlet orifice is inserted. In the position of use of the nozzle strip, a film with a plurality of nozzle openings is placed over the entrance mouth of the fluid channel. Each nozzle opening of a film has a fluid inlet opening and a fluid outlet opening. In the operating position of the nozzle strip, all fluid outlet openings of the nozzle openings of the film are therefore assigned to an inlet opening of a common fluid channel. In operation of the textile processing machine, pressurized fluid is formed through the nozzle orifices into fine fluid jets. These exit at the outlet orifice of the fluid channel without the fluid jets coming into contact with the fluid channel or the carrier element. After the exit of the finely bundled fluid jets, these impinge on the fiberglass layer to solidify this. The fluid used can be both gaseous and liquid. Preferably, water is used as the fluid.

Since all the nozzle openings of a film are assigned to a common fluid channel, the mounting of the film on the carrier element is simplified. An exact alignment of each individual nozzle opening, each with a separate bore in the support element is eliminated. In addition to the simplified assembly of nozzle strip according to the invention also has the advantage that the use is much more flexible than previously known nozzle strips. Depending on the textile machine or of the random fiber web to be processed, different films can be arranged on the carrier element. For example, the distance from adjacent nozzle openings and / or their shape or diameter can be adapted to the specific application. For several types of film, the same carrier element can be used. The nozzle openings of the film are all arranged in the region of the inlet opening of the fluid channel, so that the distance and the size of the nozzle openings can be varied without having to make a change to the carrier element.

In the region of the inlet mouth of the fluid channel, a fastening surface extending in a plane for the film can be provided on the carrier element. This attachment surface may be aligned with respect to a reference plane inclined. The reference plane preferably extends at right angles to the intended flow direction from a pressure source to the nozzle openings through the fluid channel. According to the inclination of the attachment surface, the film attached thereto is also inclined to the reference plane, so that the emission direction of the nozzle openings changes according to the inclination. In this way, the emission direction of the nozzle openings can be adjusted without to change the foil or the nozzle openings.

Preferably, the inlet and the outlet mouth of the fluid channel is slit-shaped in the extension direction of the nozzle strip. This simplifies the production of the carrier element. Instead of a plurality of bores, which is assigned in the prior art in each case a nozzle opening of the film, a plurality of nozzle openings are associated with a fluid channel according to the invention. The production of a few slot-like recesses in the support element is significantly cheaper compared to many holes. Along a slit-shaped fluid channel and its mouth, the nozzle openings in the film in a preferred embodiment are arranged evenly spaced in a row.

In a preferred embodiment, the nozzle strip has exactly one carrier element to which a plurality of films are attached. Each film can be assigned a separate fluid channel of the carrier element. Thus, all nozzle openings of a film are each assigned to one of the fluid channels of the carrier element. The carrier element extending in a longitudinal direction thus has a plurality of fluid channels which are separate from one another, as a result of which the rigidity of the carrier element with respect to a carrier element having a longitudinally continuous fluid channel is increased. The rigidity can be further improved by introducing the slot-shaped fluid channels obliquely to the longitudinal direction into the carrier element. The fluid channels and thus also the films arranged on the carrier element preferably run parallel to one another. It is possible that adjacent to the carrier element arranged foils are arranged offset viewed in their direction of extension next to each other. The slides are not aligned in a row. This results in the possibility that two foils arranged directly adjacent to the carrier element are arranged with their respective end section overlapping. At this end portion connecting means may be present, so that the two films can be releasably connected to each other.

In an advantageous embodiment of the nozzle strip, the inlet mouth of the fluid channel opens into a depression of the carrier element. This depression serves to insert the film. The inserted film can come to rest with the border of the depression at several points, whereby the relative position of the film is predetermined relative to the carrier element. The nozzle openings of the film inserted into the recess are then automatically positioned over the entrance mouth of the Fludikanals. This results in a simplified assembly of the nozzle strip. Appropriately, a separate recess in the support member is provided for each slide. The depressions can be made separate from each other. In order to connect two adjacent arranged on the carrier element films directly to each other, the recesses may be at least partially connected to each other.

• Figur 1 eine perspektivische Ansicht eines Ausführungsbeispiels eines Düsenstreifens in Teildarstellung,
• Figur 2 einen Abschnitt des Düsenstreifens aus Figur 1 in teilgeschnittener perspektivischer Darstellung,
• Figur 3 den Düsenstreifen aus Figur 1 in perspektivischer Darstellung,
• Figur 4 einen Querschnitt durch den Düsenstreifen nach Figur 1 gemäß der Schnittlinie IV-IV,
• Figur 5 ein abgewandeltes Ausführungsbeispiel des Düsenstreifens im Querschnitt,
• Figur 6 ein Ausführungsbeispiel einer in mehrere miteinander verbundene Segmente unterteilten Folie,
• Figur 7 eine Ausführungsform einer Folie mit Verbindungsmitteln zur Verbindung mit einem unmittelbar benachbart angeordneten weiteren Folie und
• Figur 8 ein abgewandeltes Ausführungsbeispiel eines Düsenstreifens.

Advantageous embodiments of the invention will become apparent from the dependent claims, the description and the drawings. In the following the invention will be explained in more detail by means of exemplary embodiments. The description is limited to essential features of the invention and other conditions. The drawing is to be used as a supplement. Show it:

• FIG. 1 a perspective view of an embodiment of a nozzle strip in partial view,
• FIG. 2 a section of the nozzle strip FIG. 1 in a partially cut perspective view,
• FIG. 3 the nozzle strip off FIG. 1 in perspective,
• FIG. 4 a cross section through the nozzle strip after FIG. 1 according to the section line IV-IV,
• FIG. 5 a modified embodiment of the nozzle strip in cross section,
• FIG. 6 an embodiment of a subdivided into several interconnected segments foil,
• FIG. 7 an embodiment of a film with connecting means for connection to a directly adjacent arranged further film and
• FIG. 8 a modified embodiment of a nozzle strip.

The invention relates to a nozzle strip 10 with a carrier element 12 extending in a longitudinal direction 11 and a plurality of films 13. The length of the carrier element 12 in the longitudinal direction 11 can vary depending on the textile machine in which the nozzle strip 10 is used and up to several meters , The support element 12 has in the embodiment according to FIG. 1 a rectangular cross-section, which comprises a fluid outlet side 22, a fluid inlet side 14 and two narrow flat sides 28. The width B of the support member may be 10mm to about 30mm and the thickness D be about 1-4mm.

Depending on the length of the carrier element 12 and thus of the nozzle strip 10, a plurality of strip-shaped films 13 are assigned to it, which likewise have a rectangular cross-section. The films 13 in the embodiment have a length of about 90-100 mm. They are 0.1-0.2mm thick and about 1-5mm wide.

Each film 13 has a plurality of nozzle openings 15. The nozzle openings 15 pass completely through the foils 13 and have a fluid inlet opening 19 and a fluid outlet opening 17 (FIG. FIG. 4 ). Both the fluid inlet opening 19 and the fluid outlet opening 17 are circular. The diameter of the nozzle opening 15 preferably corresponds approximately to the thickness of the film 13 and is for example about 0.1 mm. In the preferred embodiment, the nozzle openings 15 are arranged in the direction of extension of the film 13 in a row at a regular distance A along a straight line ( FIG. 3 ). The distance A is variable and may be, for example, about 1 mm. The films 13 are preferably made of steel, carbide or ceramic. When using a metallic foil 13, this can be prepared for example by a machining or a chipless process.

In a modified, not shown embodiment, the nozzle openings 15 may be arranged in two or more rows next to each other along parallel lines. It is possible to arrange the nozzle openings 15 in a matrix-like manner or to offset nozzle arrangements 15 of adjacent rows from one another.

In the position of use, the films 13 are attached to the carrier element 12. In accordance with the number of foils 13, in the preferred exemplary embodiment, a plurality of fluid channels 20 are present in the carrier element 12, which pass completely through the carrier element 12 in a flow direction 21. On its in the position of use of the nozzle strip 10 in the textile machine to be processed Gewrfasergelege associated fluid outlet side 22 of the fluid passage 20 exits to form an outlet port 24 from. The direction of flow 21 corresponds to the direction of flow of the fluid from a fluid inlet opening 19 of the film 13, which is assigned to a pressure source of the textile machine, via the fluid outlet opening 17 of the film 13 via an inlet mouth 23 of the fluid channel 20 to the outlet orifice 24. The fluid channel 20 is slit-shaped. In the in the Figures 1-5 illustrated embodiment of the nozzle strip 10, the slot-shaped fluid channel 20 extends at an angle α obliquely to the longitudinal direction 11 of the support member 12. The course direction of the slot-shaped fluid channel 20 are in the use position on the support member 12 arranged extension direction 35 of the film 13 before.

According to the example, the cross section of the fluid channel 20 in the flow direction 21 is constant and corresponds to the shape the output port 24. Thus, the fluid channel 20 has the shape of a slot. The fluid channel 20 can be introduced into the carrier element 12 by various methods known in the art, such as, for example, cutting or non-cutting methods.

On the fluid inlet side 14 of the carrier element 12 groove-shaped depressions 25 are introduced into the carrier element 12 for fastening the foils. The number of recesses 25 corresponds to the number of films 13 to be arranged on the carrier element 12. Each film 13 is assigned a fluid channel 20. The recess 25 is formed by the bottom 26 and a contour. The contour limits the recess 25 in its lateral extent and thus determined essentially the width and the length of the recess 25 while the bottom 26, the recess 25 is limited in depth and thus determines the height of the recess 25. The bottom 26 of each recess 25 is a mounting surface for attaching the respective film 13. The fluid channel 20 begins with its inlet mouth 23 in the bottom 26 and ends at the fluid outlet side 22. In the use position, the film 13 is on its inside 16 on the floor 26th on. The contours of the recess 25 substantially correspond to the contour of the film 13, so that the positioning of the nozzle openings 15 relative to the inlet mouth 23 of the fluid channel 20 is very easy. The position of the film 13 is clearly defined by the recess 25. Like this in the Figures 2 and 3 can be seen, the contour of the film 13 deviates in the preferred embodiment only at the rounded ends of the contour of the associated recess 25, whereby 25 gaps 27 are formed in the corner regions between the film 13 and the recess, the insertion and removal of the film 13th from the recess 25 simplify. The width or the length of the recess 25 correspond to below Considering the tolerance of the width or the length of the film 13th

When inserted into the recess 25 film 13, the nozzle openings 15 are aligned with the inlet mouth 23 of the fluid channel 20. It is thus possible to use different types of film in the recess 25 and regardless of the distance A of the nozzle openings 15 or their size or contour to ensure that a fluid jet Formed by a nozzle opening 15, the fluid channel 20 or its walls or boundaries not touched and thus meets in its unmodified form to be solidified Gewrfasergelege. Thus, regardless of the type of film used, the same carrier element 12 can be used, which significantly increases the flexibility of the nozzle strip 10. For this purpose, it is necessary for the cross section of the fluid channel 20 to be dimensioned such that a fluid jet formed by a nozzle opening 15 does not touch the fluid channel 20 and thus can emerge unchanged from the carrier material 12 in its shape.

In the first embodiment of the nozzle strip 10 according to the Figures 1-5 Each film 13 is made of a single material without joining or fastening points and thus made in one piece. Each film 13 is associated with a fully edged recess 25. The depth of the recess 25 is selected so that the outer side 18 of the inserted film 13 is substantially planar with the surface of the fluid inlet side 14 of the carrier element 12 that surrounds the depressions 25.

As this according to the FIGS. 3 and 4 is illustrated, a sealing layer 31 may be provided between the film 13 and the bottom 26 of the recess 25. The sealing layer 31 may consist of a sealing film or another sealing material and the fluidic tightness produce between the film 13 and support member 12. The sealing layer 31 can also be formed by an adhesive glue joint, by means of which the film 13 is fastened to the fastening surface of the bottom 26.

In the in the Figures 1-4 In the embodiment shown, the bottom 26 extends in a plane which is aligned at right angles to the flow direction 21 defined by the fluid channel 20. The cylindrical nozzle openings 15 are introduced into the film 13 at right angles to the plane of extent, so that the emission direction of the fluid jet emerging from the nozzle openings corresponds to the flow direction 21.

In FIG. 5 a modified embodiment is shown in which the bottom 26 extends laterally inclined by an inclination angle β relative to a reference plane E to the longitudinal direction 11. The reference plane E is aligned at right angles to the flow direction 21. The reference plane E may also be a horizontal plane, with respect to which the base 26 is inclined in the position of use of the nozzle strip 10. In this way, the emission direction of the fluid jet emerging from the nozzle openings can be set very easily, without a change to the film 13 or to the nozzle openings 15 being necessary for this purpose. The changed emission direction of the fluid jet may result in the size of the fluid channel 20 having to be adapted accordingly so that the fluid jet can contact the fluid channel 20 without contact and act on the fiber web. In the recess 25 with the inclined mounting surface 26, the same film 13 as in the first embodiment according to the Figures 1-4 be used with or without sealing layer 31.

As already related to FIG. 1 explained Accordingly, the recesses 25 and the inlet openings 23 of the fluid channel 20 of the carrier element 12 extend in a plan view of the carrier element 12 obliquely to the longitudinal direction 11 at the angle α. This direction is referred to as the extension direction 35.

Two immediately adjacent recesses 25 are arranged offset in the extension direction 35 parallel to each other. In the extension direction 35, the recesses 25 do not run in alignment. In an overlapping region 36, two immediately adjacent recesses 25 extend in the extension direction 35 next to one another (FIG. 2). An end section 37 of a film 13 is therefore arranged in the extension direction 35 next to the associated end section 37 of the adjacent film 13. In the embodiment of the nozzle strip 10 according to the Figures 1-5 are completely outlined depressions 25 are provided, which are separated by a web 39 from each other.

In a modified embodiment variant of the nozzle strip 10, two immediately adjacent depressions 25 are connected to one another in the overlapping region 36. By this measure, it is possible to connect the two adjoining films 13 with one another by connecting means 40 provided at the end regions 37 of the films 13.

Such an embodiment is shown schematically in FIG FIG. 7 illustrated, for the sake of clarity, the nozzle openings 15 are not shown. It is only the outer contour of the film 13 illustrated. As a connecting means 40, each film 13 at an end portion 37 a or a plurality of connecting projections 41 which protrude transversely to the extension direction 35 from the end portion 37. At its associated end section 37, the adjacent film 13 has one or more connecting recesses 42 into which the connecting projections 41 engage when the two films 13 have been produced. As a result, a positive connection is established. The connecting protrusions 41 expand towards their free end and, for example, are arched, similar to the connecting elements of puzzle pieces.

The connection recesses 42 are adapted to the contour of the connection projections 41. According to the embodiment described here FIG. 7 the connecting recesses 42 are provided in a projection 43 projecting laterally from the film 13, which runs flat with the outside 18 of the film 13 and whose thickness is smaller than the thickness of the remaining film 13, whereby a clearance 44 is provided in the area below the connecting recesses 42 is formed. Below the connecting projections 41 there is a support element 45, on which the projection 43 rests when the connecting projections 4 engage in the connecting recesses 42. The contour of the support element 45 is adapted in the embodiment of the contour of the free space 44.

It is understood that as an alternative to the illustrated embodiment according to FIG. 7 the connection recesses 42 could also be provided in the support element 45, wherein the connection projections 41 are then arranged correspondingly on the projection 43.

In an in FIG. 8 schematically illustrated modification of the nozzle strip 10 is the extension direction 35 of the films 13 parallel to the longitudinal direction 11 of the support element 12 aligned. The films 13 are arranged so to speak in two rows offset from one another, wherein the films 13 are spaced from a common row. The distance between two successive films 13 of a row is smaller than the length of the films 13, so that overlap regions 36 form. The equipped with the connecting means 40 films 13 can for the nozzle strip 10 in the embodiment according to FIG. 8 be used. Also in the context of the Figures 1-5 described embodiments of the nozzle strip 10, the extension direction 35 and the longitudinal direction 11 may extend parallel to each other and an arrangement of the films 13 are provided according to Figure 8.

In a further modification, a film 13 may consist of a plurality of segments 50, which may be joined together in the extension direction 35. At the in FIG. 6 schematically shown embodiment of a segmented film 13, two segments 50 are provided which can be positively connected to each other. Also, the joining of two segments 50 can with the in connection with FIG. 7 explained connecting means. For this purpose, connecting projections 41 'are provided on a segment 50, which protrude in the extension direction 35 from the relevant segment 50 and engage in a form-fitting manner when the connection between the two segments 50 is made in connection recesses 42' of the other segment 50.

During operation in the textile machine, fluid and, in particular, water are conveyed through the nozzle openings 15 of the film 13 in the flow direction 21 to the outlet orifice 24 of the fluid channel 20 of the carrier element 12 by a pressure source. Each of the fluid channels 20 is dimensioned so large that the fluid, without touching the fluid channel 20 to the processed fiber web in fine bundled Water jets is ejected. In this way the Gewrfasergelege is solidified.

The present invention relates to a nozzle strip 10 with a carrier element 12, in which a plurality of slot-shaped fluid channels 20 are introduced. Each fluid channel 20 is associated with a film 13 having a plurality of nozzle openings 15. In the position of use of the film 13, this is arranged above an inlet mouth 23 of the associated fluid channel 20, so that its nozzle openings 15 lie within the contour of the fluid inlet opening 19 assigned to it. Each film 13 is fixed in this position of use on a flat mounting surface of the support member 12. The attachment surface may be formed by the bottom 26 of a groove-like recess 25 in the support member 12. For each film 13, a separate recess 25 is provided. The support member 12 can be used for a variety of different film types. The distance of the nozzle openings 15 of the film 13 or the size or shape of the nozzle openings 15 can vary between different film types without changes to the support member 12 would be necessary.

LIST OF REFERENCE NUMBERS

10

jetstrips

11

longitudinal direction

12

support element

13

foil

14

Fluid inlet side v. 12

15

nozzle opening

16

Inside v. 13

17

Fluid outlet opening

18

Outside v. 13

19

Fluid inlet opening

20

fluid channel

21

flow direction

22

Fluid outlet side v. 12

23

Entrance estuary v. 20

24

Exit mouth v. 20

25

deepening

26

Soil v. 25

27

gap

28

Flat side v. 12

31

sealing layer

35

extension direction

36

overlap area

37

Section v. 13

39

web

40

connecting means

41, 41 '

connecting projection

42, 42 '

connecting recess

43

head Start

44

free space

45

support element

50

Segment v. 13

e

reference plane

Claims (14)

1. Nozzle strip (10) for a textile processing machine,
   with a support element (12), which has at least one slot-shaped fluid duct (20) with an entry opening (23),
   with at least one film (13), which is connected to the support element (12) in the position of use and has a multiplicity of nozzle openings (15) respectively with a fluid inlet (19) and a fluid outlet (17), wherein all the fluid outlets (17) of the nozzle openings (15) of the film (13) are associated with an entry opening (23) of a common fluid duct (20) of the support element (12) and wherein in the position of use the fluid outlets (17) of the nozzle openings (15) lie within the contour of the entry opening (23).
2. Nozzle strip according to claim 1, characterised in that a base (26) extending in one plane is provided for the film (13) in the region of the entry opening (23) of the fluid duct (20) on the support element (12).
3. Nozzle strip according to claim 1, characterised in that the base (26) is inclined in relation to a reference plane (E), wherein the reference plane (E) is oriented at right angles to the envisaged flow direction (21) through the fluid duct (20).
4. Nozzle strip according to claim 1, characterised in that the support element (12) extends in a longitudinal direction (11) and the film (13) fastened on the support element (12) in the position of use runs at an angle to the longitudinal direction (11).
5. Nozzle strip according to claim 1, characterised in that the nozzle strip (10) has precisely one support element (12), which comprises multiple fluid ducts (20) and on which multiple films (13) are arranged.
6. Nozzle strip according to claim 5, characterised in that each film (13) is associated with a separate fluid duct (20) of the support element (12).
7. Nozzle strip according to claim 5, characterised in that the films (13) are oriented parallel to one another.
8. Nozzle strip according to claim 5, characterised in that films (13) arranged adjacently on the support element (12) are arranged offset next to one another viewed in their extension direction (35).
9. Nozzle strip according to claim 5, characterised in that a film (13) has an end section (37), on which at least parts of connection elements (40) are provided to connect the film (13) to another film (13).
10. Nozzle strip according to claim 1, characterised in that the entry opening (23) of the fluid duct (20) opens in a depression (25) of the support element (12) provided for insertion of the film (13).
11. Nozzle strip according to claim 10 in conjunction with claim 5, characterised in that a depression (25) is provided in the support element (12) for each film (13).
12. Nozzle strip according to claim 11, characterised in that depressions (25) arranged adjacently on the support element (12) are connected to one another.
13. Nozzle strip according to claim 1, characterised in that the nozzle openings (15) have a cylindrical shape.
14. Nozzle strip according to claim 1, characterised in that the nozzle openings (15) are arranged spaced at regular intervals in a row on the film (13).

Images