EP3205762B1 - Nozzle strip for a textile processing machine - Google Patents

Description

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

For the consolidation of nonwovens, textile processing machines are known in which a fluid, e.g. Water is expelled under high pressure on fiberglass scrim. The fine fluid jets engulf the fibers together to form a strong nonwoven web. Before a solidification step, pre-moistening or pre-consolidation of the random fiber scrim often takes place. This step can serve to prepare the scrim, in particular the horizontal and / or vertical distribution of the fibers, for solidification. Thereby, for example, an improved tear strength in the transverse direction to the advancing direction of the solidifying machine or a reduced formation of the fluid jet-solidifying characteristic fluid jet lines (water jet lines) can be obtained. Also, rewetting or reworking, i. it may be desirable to apply the finely divided fluid to the solidified fabric. Thus, for example, the resulting characteristic fluid jet lines (water jet lines) can be laminated. For the preparation or post-processing a spraying fluid jet is needed.

To generate a sprayed fluid jet, fluid is supplied to a low-pressure injector, the fluid flowing in a fluid curtain is sprayed onto the web Wirrfasergelege which is moved under the low-pressure injector in a feed direction. Such a low-pressure injector is for example off WO 96/35835 A1 known.

For the main consolidation describes EP 2 302 120 A1 an injector for a textile processing machine, wherein the injector for the formation of concentrated, high-energy and preferably closed beams for solidification (solidification jet) is set up. For this purpose, the injector has a nozzle strip, wherein water is forced to form needle-like jets under high pressure through the nozzle channels of the nozzle strip.

Nozzle strips for generating the solidification jets are known, for example, from US Pat US Pat. No. 7,303,465 B2 known. Such nozzle strips have an upper side and a lower side, wherein a plurality of nozzle channels extend from the upper side to the lower side. At the top, a nozzle channel has a cylindrical portion, followed by the same diameter, a conical portion which widens toward the bottom. Water is forced under high pressure from the top through the nozzle channels, forming a thin, high-energy water jet, which strikes the Wirrfasergelege and this solidifies.

Based on this prior art, it may be considered an object of the present invention to provide an improved means for moistening or processing unconsolidated or consolidated random fiber webs.

This object is achieved with a nozzle strip for a textile processing machine according to claim 1 and a method for producing a nozzle strip according to claim 15.

The nozzle strip according to the invention has a first side and a second side and at least one nozzle channel. The, preferably unbranched, nozzle channel extends from the first side to the second side and defines a first flow direction from the first side to the second side and / or a second flow direction from the second side to the first side. The nozzle channel has a first portion and a second portion, wherein the second portion is arranged offset relative to the first portion transversely to the first flow direction and / or the second flow direction. Preferably, the second portion is arranged transversely to the first and / or the second flow direction non-concentric to the first portion.

The first throughflow direction and / or the second throughflow direction can be defined in particular by the first section and / or the second section of the nozzle channel. The first flow direction and / or the second flow direction may be anti-parallel. The first portion and / or the second portion may be oriented transversely to the surface of the first side and / or across the surface of the second side. The first throughflow direction and / or the second throughflow direction, understood as vectors, may be transverse to the surface of the first side and / or the surface of the second side.

The first section is located at or in the first side, and the second section is located at or in the second side of the nozzle strip, such that upon pressurization of the first side with fluid, first through the first section and then fluidically with the first Section connected second section flows. When the second side of the nozzle strip is acted upon, the situation is reversed.

The nozzle strip can be used, for example, in an injector or water bar for pre-moistening, be acted upon on the first page with water or other liquid or gaseous fluid. As a result, the fluid enters the nozzle channel in an opening (opening) on the first side of the nozzle strip, in the first direction of flow through the first section and the second section, which can also be referred to as a nozzle, through the nozzle channel and out of a second mouth (Opening) on the second page. The beam then strikes the random fiber web in this arrangement of the second side.

Due to the preferably asymmetric structure of the nozzle channel as a result of the offset, the fluid in this operating position can be atomized relatively short behind the opening to form a sprayed jet which is particularly suitable for the pre-moistening. Due to the arrangement of the offset in the direction of the longitudinal extension and / or the width extension of the nozzle strip, the nozzle channel may be adapted to generate a jet spraying behind the second orifice with a deflection in a preferred direction in the longitudinal direction and / or the transverse direction of extension of the nozzle strip. In use, it can be a deflection in or against the feed direction and / or transverse to the feed direction of the solidification machine result. Due to the improved spray properties and / or deflection of the spray jet in this operating position of the nozzle strip, improved pre-consolidation, improved distribution of the fibers across the feed direction of the random fiber web in the consolidation machine, improved maximum tearing force of the nonwoven transversely to the feed direction or particular suitability of the spray jet to conceal the fluid jet lines in the solidified fabric. Due to the size of the offset and thus possibly by the size of the asymmetry, the strength of the deflection in the preferred direction can be influenced.

Alternatively or additionally, the nozzle strip can be set up for use in a second position of use, in which this, used in an injector or water beam for high-pressure solidification, is acted upon by fluid under high pressure on the second side, so that the fluid in the second flow direction of the second side to the first side, first flows through the second portion and then through the first portion through the nozzle channel. Preferably, the nozzle strip is adapted to generate in this position of use a solidification jet for the main consolidation. For this purpose, the high-pressure fluid enters the nozzle channel on the second side, and a hardening jet forms in the second section, which preferably leaves the nozzle channel largely uninfluenced by the first section and the offset between the first section and the second section. To form a hardening beam, the ratio of the length of the second section for example, be less than or equal to 1.4 to the diameter of the second section. As a result, a particularly concentrated, high-energy and closed beam can be generated.

In the embodiment in which the nozzle strip is adapted to be used in both use positions, the nozzle channel forms a two-way nozzle channel. In this embodiment, it may be sufficient if the textile manufacturer keeps only one type of nozzle strip in stock. A nozzle strip, which has reached its lifetime in the operating position for generating the hardening beam, can then be used, for example, in the operating position for pre-moistening. In this way, waste can be avoided and the recycling costs can be reduced.

The first portion is bounded by a first wall surface and the second portion is bounded by a second wall surface transverse to the flow direction. The first wall surface and / or the second wall surface may be, for example, a circumferentially interrupted or uninterrupted portion of a surface of revolution, e.g. a cylindrical jacket surface or a truncated cone lateral surface defining an axis of rotation. The first wall surface and / or the second wall surface may for example also be angular, symmetrical or asymmetrical or irregularly shaped. The first wall surface and / or the second wall surface are preferably straight in a longitudinal section through the nozzle channel. The first wall surface and / or the second wall surface may, for example, be perpendicular to the surface of the first side and / or the surface of the second side.

When spoken in this application of a circumferential direction is meant, so a direction about the first and / or the second flow direction is meant. When in this application of cylinder, cone or truncated cone or cylinder surface or conical surface or truncated cone surface is called, so preferably a straight cylinder or a straight cone or truncated cone is meant in the sense that the cylinder axis or the cone axis perpendicular to the (imaginary ) Base of the cylinder or the cone or the truncated cone stands. A (imaginary) base surface of the cylinder or the cone or the truncated cone is preferably parallel to the first side and / or the second side.

Preferably, each nozzle channel in each case has its own first section, so that the first section of the nozzle channel is fluidically separated by the first wall surface from the first sections of further nozzle channels, in each case transversely to the throughflow direction. In addition, each nozzle channel preferably has its own second section, so that the second section of the nozzle channel is fluidically separated from the second sections of further nozzle channels by the second wall surface of the second section, transversely to the throughflow direction.

Preferably, the first section and the second section each define a central axis, wherein the central axis of the second section is offset, particularly preferably parallel offset, to the central axis of the first section. As a result, the offset of the second section relative to the first section can be defined transversely to the first throughflow direction and / or the second throughflow direction. The central axis of the first and / or second portion may be the first and / or the second flow direction establish. In the case of a cylindrical, conical or limited by a surface of rotation first or second portion may be the central axis, for example, the cylinder or cone, or generally the axis of rotation. The central axis of the first section may be an axis of symmetry of the first section. The central axis of the second section may be an axis of symmetry of the second section. The central axis of the first section and / or the central axis of the second section may be oriented transversely to the surface of the first side and / or transversely to the surface of the second side. Preferably, the central axis of the second portion is oriented transversely to the surface of the second side. In this way, it is primarily the offset which preferably determines a preferred direction of the spray jet along the surface of the second side on the second side in the operating position for generating an early, ie relatively short distance behind the second side sprayed beam.

Preferably, the diameter of the first portion is greater than the diameter of the second portion. Particularly preferably, the diameter of the first orifice is greater than the diameter of the second orifice. Regardless of the orientation of the center axes of the first section and the second section, the second section across the first and / or second flow direction is preferably within the projection of the first section and / or the first orifice on the second side of the nozzle strip in the direction of the thickness extension of the nozzle strip (transverse to the first side) and the first flow direction arranged. With central axes defined by the first section and the second section, the extension of the central axis of the first section is preferably within of the second section. The offset distance measured between the central axis of the first section and the central axis of the second section is preferably less than or equal to half the difference of the diameter of the first section and the diameter of the second section.

The nozzle strip according to the invention with at least one of the features described above is particularly easy to produce. In addition, the nozzle channels can be arranged very dense in this way.

Preferably, the first section in the flow direction is longer than the second section. Material between the first sections of the nozzle channels can serve to stiffen the nozzle strip. By a long first section, the flow from the first side to the second side fluid already a flow direction can already be impressed. A long first section can thus act on the fluid in a direction of flow, thus flowing in a defined throughflow direction to the second section. Preferably, the first section in the flow direction is at least a factor of 3 longer than the second section.

Between the first portion and the second portion may be disposed a central portion of the nozzle channel having a central portion wall surface defining it transverse to the first and / or second flow direction. The center section wall surface may, for example, be a circumferentially closed section of a rotation surface, for example a truncated cone lateral surface. The center section wall surface may be, for example also be angular, symmetrical or asymmetrical or irregular shaped. The middle section can define a central axis. The central axis of the central portion may be oriented transversely to the surface of the first side and / or transversely to the surface of the second side.

The second section is preferably arranged offset transversely to the first and / or the second flow direction relative to the central portion. It is preferably the same offset, i. same offset direction and same offset distance, between the first portion and the second portion and between the central portion and the second portion. For example, the first portion and the middle portion may define a common center axis. Particularly preferably, the first section and the middle section define a common central axis, wherein the central axis of the second section is offset relative to the common central axis transversely to the first and / or second throughflow direction, preferably parallel. The second portion is preferably arranged transversely to the first and / or second flow direction non-concentric with the central portion. The first section and the middle section may be arranged concentrically, for example, transversely to the first and / or second flow direction.

Preferably, the diameter of the central portion is less than or equal to the diameter of the first portion. The center section may, for example, connect to the first section with the diameter of the first section. The cross section of the nozzle channel tapers in the central portion in the first flow direction. The cross section of the nozzle channel tapers in the first Flow direction in the central portion preferably over a non-zero length. An opening angle of the middle section is therefore particularly preferably less than 175 °. Preferably, an abrupt taper of the flow cross section of the nozzle channel in the first flow direction is formed by the central portion. For this purpose, the longest extent of the central portion in the first and second flow direction is preferably less than or equal to the longest extent of the second portion in the first and second flow direction.

The center section wall surface may be a circumferentially closed portion of a rotation surface. The middle section wall surface is preferably a circumferentially closed section of a truncated cone lateral surface. Preferably, the center section wall surface defines an opening angle of the central section which is at least 110 ° to a maximum of 175 °. Particularly preferably, the opening angle is between a minimum of 120 ° and a maximum of 140 °. For example, the center section wall surface may have an opening angle of 130 °.

By means of center section wall surfaces having such an opening angle, an early-spraying jet which is particularly suitable for pre-wetting can be formed.

Preferably, the mid-section panel is a circumferentially-closed asymmetric constriction in which the mid-section panel defines the mid-section in the flow direction from the first side to the second side except for a non-concentric with the central axis of the first section arranged opening in the central portion wall surface, which is preferably an opening into the second portion limited. Thereby, an asymmetric flow obstruction for the fluid in the nozzle passage in the flow direction from the first side to the second side may be formed by the center section wall surface.

In this way, a nozzle strip with a nozzle channel can be created, which generates a spray jet shortly behind the second side, which can also have a preferred direction.

The center section wall surface may form a first guide surface section and a second guide surface section, wherein the guide surface sections are arranged opposite one another transversely to the first flow direction. The second guide surface section preferably has a greater extent in the first flow direction than the first guide surface section. Particularly preferably, the second guide surface section ends downstream in the first throughflow direction after the first guide surface section. Stages are preferably formed in the nozzle channel through the first and second guide surface sections, which lie opposite each other transversely to the direction of flow. Preferably, the first and second fulcrum portions begin at the same distance from the surface of the first side, but the second stage formed by the second fulcrum portion terminates in the first flow direction behind the first stage (downstream). The second stage formed by the second guide surface section is preferably longer in the first through-flow direction and / or transversely to the first through-flow direction than the first step, which extends through the first guide surface section is formed. The baffle sections are preferably inclined relative to a plane transverse to the first flow direction.

Through the steps or the guide surfaces, a nozzle channel can be created with improved spray characteristics. In particular, a nozzle channel can be created, spraying the jet at an even shorter distance to the second side. Also, a preferred direction or deflection of the spray can be created by the staggered steps.

The second section preferably follows the middle section in the first throughflow direction. Between the middle wall surface and the second wall surface of the second portion, there is preferably a transition edge, which may also be referred to as a junction edge, wherein the transition edge is circumferentially closed. Preferably, the closed transition edge is inclined relative to the first and / or second flow direction. Preferably, the transition edge is defined by a self-contained sectional curve of the lateral surface of a (imaginary) cylinder or cone with the lateral surface of the (imaginary) geometric figure that defines the center wall surface. Particularly preferably, the transition edge is defined by a self-contained sectional curve of the lateral surface of a (imaginary) cylinder or cone with the lateral surface of a (imaginary) truncated cone, wherein the cylinder axis or the cone axis has a, preferably parallel, offset to the truncated cone axis. Such a transition edge, for example, by placing a first recess with a conical or otherwise shaped bottom in the first side of the nozzle strip and the arrangement of a second cylindrical or conical recess in the bottom of the first recess, for example by drilling or forming, indenting, embossing or shearing are created.

In a first section and / or a middle section, each defining a central axis, the center axis of the first section and / or the middle section of a nozzle channel may be taken as a reference axis to define an offset direction. The middle section or the central axis of the middle section and / or the second section or the central axis of the second section of the nozzle channel is preferably offset transversely to the reference axis in a specific offset direction and thus preferably transversely to the first and / or second flow direction.

A transition edge, which is preferably present between the center wall surface and the second wall surface of the second section, particularly preferably has a first transition edge section, which is arranged in the offset direction, and a second transition edge section, which is opposite to the offset direction and opposite the first transition edge section. The second transition edge section is preferably offset relative to the first transition edge section in the first throughflow direction.

The middle section wall surface is preferably straight in longitudinal section through the nozzle channel, but may also be curved convexly or concavely. The section line of the middle section wall surface preferably falls in monotonically from the first section to the longitudinal section through the nozzle channel to the second section. Due to the monotonous waste, in particular no undercut is formed transversely to the first or second throughflow direction through the middle section wall surface. Preferably, the wall bordering the nozzle channel transversely to the first and / or second flow direction is also undercut-free, also in the area of the first and the second section.

In this way, a nozzle channel can be provided, which is free of structures, which provided in particular when the nozzle strip with water on the first side and flow from the first side to the second side for deflecting the flow direction such that the water partially against the flow direction from the first to the second side flowed.

Preferably, the center panel with the diameter of the first section adjoins the first wall surface of the first section. Alternatively or additionally, the center wall surface preferably adjoins the second section with the diameter of the second section. A nozzle strip with a nozzle channel formed in this way can be produced particularly easily.

The first portion may adjoin the central portion, wherein the transition from the first wall surface to the central portion panel may be rounded. The radius of curvature is particularly preferably constant along the transition in the circumferential direction. As seen in longitudinal section through the nozzle channel, the center section wall surface may be disposed at an obtuse angle to the first wall surface. The angle between the first wall surface and the middle section wall surface may also be 180 °. For example For example, the central portion and the first portion may be bounded by a portion of the same surface of rotation, such as a truncated cone surface, circumferentially around the first and / or second flow direction, transverse to the first and / or second flow direction.

Also seen in longitudinal section through the nozzle channel, the center section wall surface can be arranged at an obtuse angle to the second wall surface. The transition edge between the center section wall surface and the second wall surface may be rounded. At the transition between the middle section wall surface and the second wall surface, a Kanteneinzug may be formed.

The rounding of the transition edge between the center section wall surface and the second wall surface may have different rounding radii along the edge. A trained at the transition edge indentation can be different sizes along the edge. For example, the radius of curvature of the rounded transition edge in a lying in the offset direction arranged first transition edge portion is greater than the radius of curvature of the rounded transition edge in an opposite, opposite to the direction of displacement lying second transition edge portion. In the case of an edge indentation at the transition between the middle section wall surface and the second wall surface, the edge indentation in a first transition section lying in the offset direction may, for example, be larger than in a second transition edge section disposed opposite to the offset direction.

The nozzle strip may be made of hardened material. Regardless, the nozzle strip preferably has a hardened surface on the second side. The hardened surface may be limited to an area around the second orifices that does not extend across the entire width and / or length of the surface of the second side of the nozzle strip. At the second orifices of the nozzle channels, sharp edges may be provided by the hardened material or the hardened surface on the second side, which in the use position for solidification support the formation of solidification jets and are subject to reduced wear.

A nozzle strip extends in a longitudinal direction and a transverse direction (width). The length of a nozzle strip can be several meters. The width of the nozzle strip may for example be between 10 mm and 30 mm. The thickness can be for example between 0.5 and 4 mm. The nozzle channels may be arranged in a longitudinal direction of the nozzle strip in a row or for example in two, three or more rows next to each other. The offset direction of the middle section and / or of the second section relative to the first section and / or the middle section may be oriented in the longitudinal extension direction and / or the transverse extension direction of the nozzle strip. In one embodiment of a nozzle strip, the second sections of the nozzle channels are arranged offset in the same offset direction, so that it can also be spoken of parallel offset second sections. In another embodiment, nozzle channels of the nozzle strip have different offset directions of offset of the second portion.

An above-described nozzle channel is preferably created by arranging a first recess and by arranging a second recess arranged offset therefrom. The first recess preferably forms the first section and optionally the middle section. The second recess preferably forms the second section, wherein the second recess may also be referred to as a nozzle.

The first recess and thus in particular the first section or the middle section can be arranged, for example, by drilling, lasering, eroding, forming, impressing or embossing.

Preferably, the first portion, and preferably also the central portion in a nozzle strip described above by formation of a bore or created by laser or erosion recess in the strip material is formed. Preferably, the first portion and the central portion, which may be prepared for example by arranging a bore or a recess created by laser or erosion or otherwise produced in one operation.

• Es wird ein Material mit einer ersten Seite und einer zweiten Seite bereitgestellt, das vorzugsweise ein Streifenmaterial ist. Das Material kann beispielsweise gehärtet sein oder die erste und/oder die zweite Seite kann beispielsweise eine gehärtete Oberfläche aufweisen. Es wird eine erste Ausnehmung, beispielsweise eine Bohrung, mit einem Boden und einem ersten Durchmesser auf der ersten Seite des Materials angeordnet, wobei die erste Ausnehmung eine Mittelachse festlegt. Im Falle einer Bohrung legt die Bohrung beispielsweise eine Bohrungsachse als Mittelachse fest. Die Mittelachse bzw. die Bohrungsachse steht vorzugsweise quer zu der Oberfläche der ersten Seite. In dem Boden der ersten Ausnehmung wird quer versetzt zu der Mittelachse der ersten Ausnehmung, beispielsweise quer versetzt zu der Bohrungsachse der Bohrung, eine zweite Ausnehmung mit einem zweiten Durchmesser, der kleiner ist als der erste Durchmesser angeordnet. Dies kann beispielsweise durch Stanzen, Scherschneiden, Umformen, Eindrücken oder Prägen, beispielsweisemit Hilfe eines Stempels oder eines Eindrückwerkzeugs, geschehen. Auch ein Bohren der zweiten Ausnehmung ist beispielsweise möglich. Der Arbeitsabschnitt des Werkzeugs zur Herstellung der zweiten Ausnehmung, z.B. des Stempels oder des Eindrückwerkzeugs, kann dazu beispielsweise quer achsenversetzt, vorzugsweise parallel achsversetzt, zu der Mittelachse der ersten Ausnehmung, beispielsweise der Bohrungsachse, in die erste Ausnehmung eingeführt und zur Ausbildung der zweiten Ausnehmung in einer Arbeitsrichtung, vorzugsweise parallel zu der Mittelachse der ersten Ausnehmung, vorangetrieben werden. Auf diese Weise kann eine zweite Ausnehmung mit einer Mittelachse geschaffen werden, die, vorzugsweise parallel, quer versetzt zu der Mittelachse der ersten Ausnehmung, beispielsweise der Bohrungsachse, ist.

A nozzle strip as described above can be produced, for example, by the following method:

• There is provided a material having a first side and a second side, which is preferably a strip material. The material may be hardened, for example, or the first and / or the second side may, for example, have a hardened surface. It will a first recess, such as a bore, having a bottom and a first diameter disposed on the first side of the material, the first recess defining a central axis. In the case of a bore, the bore defines, for example, a bore axis as a central axis. The central axis or the bore axis is preferably transverse to the surface of the first side. In the bottom of the first recess is transversely offset from the central axis of the first recess, for example, transversely offset from the bore axis of the bore, a second recess having a second diameter, which is smaller than the first diameter. This can be done, for example, by punching, shearing, forming, impressing or embossing, for example by means of a punch or an indenting tool. A drilling of the second recess is possible, for example. For this purpose, the working portion of the tool for producing the second recess, for example the punch or the indenting tool, can be transversely offset axially, preferably offset axially, to the center axis of the first recess, for example the bore axis, inserted into the first recess and to form the second recess in FIG a working direction, preferably parallel to the central axis of the first recess, are driven. In this way, a second recess can be created with a central axis, which, preferably parallel, transversely offset to the central axis of the first recess, for example, the bore axis.

Through fine machining, the edge at the transition from the second recess to the surface of the second side of the nozzle strip can be formed into a sharp edge which is used to produce a solidification jet is suitable for use of the nozzle strip in the appropriate position of use. The curing of the strip material or the surface of the second side can also be done, for example by a suitable coating, after the production of the bore and the recess.

The drawings show exemplary embodiments of the nozzle strip according to the invention and of the production method according to the invention.

• Figur 1a - einen Düsenbalken mit einem erfindungsgemäßen Düsenstreifen in einer ersten Gebrauchslage,
• Figur 1b - den Düsenbalken aus Figur 1a mit einem erfindungsgemäßen Düsenstreifen in einer zweiten Gebrauchslage,
• Figur 2 - einen erfindungsgemäßen Düsenstreifen in einer Draufsicht,
• Figur 3a - den erfindungsgemäßen Düsenstreifen nach Figur 2 in einer Querschnittdarstellung,
• Figur 3b - einen Querschnitt durch den Düsenkanal des Düsenstreifens nach Figur 3a,
• Figur 3c - einen Ausschnitt der Figur 3a,
• Figur 3d - einen Querschnitt durch einen Düsenkanals eines alternativen erfindungsgemäßen Düsenstreifens und
• Figur 4 - eine schematische Darstellung des erfindungsgemäßen Verfahrens.

In a schematic representation:

• FIG. 1a a nozzle bar with a nozzle strip according to the invention in a first position of use,
• FIG. 1b - the nozzle bar off FIG. 1a with a nozzle strip according to the invention in a second position of use,
• FIG. 2 a nozzle strip according to the invention in a plan view,
• FIG. 3a - After the nozzle strip according to the invention FIG. 2 in a cross-sectional view,
• FIG. 3b - After a cross section through the nozzle channel of the nozzle strip FIG. 3a .
• Figure 3c - a section of the FIG. 3a .
• 3d figure - A cross section through a nozzle channel of an alternative nozzle strip according to the invention and
• FIG. 4 - A schematic representation of the method according to the invention.

FIG. 1a shows a nozzle bar 10 with a recess 12 on the pressure side 14 of the nozzle bar 10 for a textile processing machine. The recess 12 has a support surface 16. In the recess 12, an inventive nozzle strip 18 is arranged, which has a first side 20 and a second side 22. The surfaces of the first side 20 and the second side 22 are preferably parallel to each other. The nozzle strip 18 is in a first use position with the surface of its second side 22 on the support surface 16, wherein the support surface 16 is adapted to support the nozzle strip 18 when the nozzle bar 10 on the pressure side 14, and thus the nozzle strip 18 on the first page 20, is pressurized with pressurized water. The nozzle strip has a nozzle channel 24 having a first portion 26 on the first side 20 of the nozzle strip 18 and a second portion 28 on the second side 22 of the nozzle strip. The nozzle channel 24, in particular its first section 26 and second section 28, defines a first flow direction 30 from the first side 20 to the second side 22. With the nozzle strip 18 in this position of use, an early behind the second side 22 of the nozzle strip 18 sprayed beam 32 is generated, which strikes a moving in the advancing direction 34 web 36 Wirrfasergelege or solidified textile and pre-moistened or treated or scrubbed, for example laminated , For the pre-wetting, the nozzle strip 18 on the first side 20 can be acted upon, for example, with water at a pressure of 5 to 30 bar. For laminating, the nozzle strip 18 on the first side 20 can be pressurized, for example, with water at a pressure of 5-250 bar.

FIG. 1b shows a nozzle bar 10 after FIG. 1a with a nozzle strip 18 according to the invention in a second position of use. It is based on the above description of the FIG. 1a directed. Here are just a few differences. The second position of use is the opposite position to the first position of use, in the sense that the nozzle strip 18 rests on the support surface 16 with the surface of the first side 20 in this position of use. The nozzle channel 24, in particular the first portion 26 and the second portion 28 of the channel, thus defining a second flow direction 38 from the second side 22 to the first side 20, so that the water first through the second section 28 and then through the first Section 26 flows. In this position of use of the nozzle bar 10 is pressurized from the pressure side 14 forth with pressurized water, whereby the nozzle strip 18 is acted upon on the second side 22 with pressurized water. In this position of use, thus, a hardening beam 40 is formed, which impinges on the web 36 pre-moistened and / or preconsolidated random fiber fabric or textile and devours their fibers together. For solidifying the nozzle strip 18 on the second side 22, for example, be subjected to a pressure of 10 - 450 bar. By a not shown sealing means is ensured that in any of the working positions water between the support surface 16 and the nozzle strip but only through the nozzle channels can flow.

FIG. 2 shows a plan view of a nozzle strip 18 according to the invention on the surface of the first side 20. The nozzle strip 18 has a longitudinal extent 42 (length) and a transverse extent 44 (width), which has a longitudinal extension direction 42 and a transverse extension direction 44th establish. The length can be, for example, several meters and the width, for example, a few centimeters. The nozzle strip 18 has, for example, a thickness of 1 mm. Preferably, the nozzle strip 18 has a plurality of nozzle channels 24 arranged one after the other in the longitudinal extension 42 in a row. It can also be arranged several rows next to each other. The nozzle strip 18 is in one piece. It is also possible that the nozzle strip is composed of several sections. The nozzle strip may for example consist of metal or ceramic or have the materials mentioned.

FIG. 3a shows the nozzle strip 18 according to the invention FIG. 2 in a cross section along the area AA. FIG. 3b shows a cross section through the nozzle channel 24 along the surface BB FIG. 3a , Figure 3c shows a section C from FIG. 3a , For a general description of the nozzle strip 18 in FIG FIG. 3a In addition to the explanations to the FIGS. 1a . 1b and 2 directed.

The unbroken nozzle channel 24 passing through the nozzle strip 18 extends from a first orifice 46 on the first side 20 to a second orifice 48 on the second side 22. A first portion 26 of the nozzle channel 18 is contiguous with the first orifice 46 and second portion 28 adjacent to the second orifice 48. Alternatively, one or more further sections may be arranged between the first orifice 46 and the first section 26 or the second orifice 48 and the second section 28. Each of the nozzle channels 24 in the nozzle strip 18 has its own first section 26, each with its own first orifice 46 on the first side 20 and a separate second orifice 48 on the second page 22 on. Alternatively, a plurality of nozzle channels 24 may have a common first portion 26. Between the first portion 26 and the second portion 28, a central portion 50 is arranged. The middle section 50 adjoins the first section 26 and the second section 28. Alternatively, a further section may be arranged between the middle section 50 and the first section 26 and / or the middle section 50 and the second section 28.

The diameter 52 of the first portion 26 is greater than the diameter 54 of the second portion 28. Preferably, the diameter 52 of the first portion 26 is so large that the water in the use position for generating a hardening beam after passing through the second portion 28 of the first section 26 is largely unaffected, so that the second section 28 preferably substantially the second flow direction 38 determines. The nozzle channel 24 tapers abruptly in the middle section 50 in the first throughflow direction 30 from the first side 20 to the second side 22. The opening angle 56 of the middle section 50 is preferably at most 175 °, preferably 110 ° to 175 °.

The nozzle channel 24 is bounded by an undercut-free channel wall 58 transversely to the first flow direction 30. In particular, the first wall surface 60 of the first portion 26, the second wall surface 62 of the second portion 28, and the mid-portion wall surface 64 of the central portion 50 define the nozzle channel 24 transverse to the flow direction 30.

The first wall surface 60 is, for example, a cylinder jacket surface or a truncated cone surface, these being examples of a first wall surface 60 which is preferably generally a portion of a surface of revolution closed in the circumferential direction 66 about the first flow direction 30 and / or the second flow direction 38.

The second wall surface 62 of the second section 28 is, for example, a section of a cylinder jacket surface or a truncated cone lateral surface closed in the circumferential direction 66, which are examples of a second wall surface 62, which is generally in the circumferential direction 66 about the first flow direction 30 and / or the second flow direction 38 is closed portion of a surface of revolution.

The middle section wall surface 64 is in the embodiment according to FIG. 3a a closed in the circumferential direction 66 about the first flow direction 30 portion of a truncated cone surface. The middle section wall surface 64 may, for example, also be another section of a rotation surface, for example a truncated cone lateral surface, which is closed in the circumferential direction 66 about the first flow direction 30. As a result of the truncated cone shape, the central section wall surface 64 in the illustrated longitudinal section through the nozzle channel 24 is straight and the central section wall surface 64 drops monotonically in the first throughflow direction 30 from the first side 20 to the second side 22.

In an embodiment in which the first wall surface 60 and / or the second wall surface 62 are bounded by a conical wall, the opening angle of the first wall surface 60 and / or the second wall surface 62 is preferably smaller than the opening angle 56 of the central portion wall surface. In an embodiment in which the first section 26 and / or the second section 28 expand, the first section 26 and / or the second section 28 expands preferably in the second throughflow direction 38 from the second side 22 to the first side 20.

The second portion 28 is relative to the first portion 26 and in the embodiment in FIG FIG. 3a Also arranged offset to the central portion 50 transversely to the first flow direction 30 and the second flow direction 38. It may be spoken by a nozzle 28 which is asymmetrically arranged with respect to the first section 26 and to the central section 50. In the following, this is explained on the basis of the central wall 68 of the first wall surface 60 defined by the first wall surface 60 and the central axis 70 of the second wall surface 62 defined by the second wall surface 62.

The first wall surface 60, the second wall surface 62 and / or the middle section wall surface 64 can each define a rotation axis as sections of a rotation surface that are closed in the circumferential direction 66. The axis of rotation may, for example, be a cylinder axis or a truncated cone axis if the surfaces are sections of such a surface of revolution. By the respective axis of rotation, the first portion 26, the second portion 28 and / or the middle portion 50 each define a central axis. In a preferred embodiment, the first portion 26 and the middle portion 50 define a common center axis 68. The central axis of the first section or the middle section 68 is preferably oriented transversely to the surface of the first side 20 and / or the second side 22. Preferably, the central axis of the second portion 70 is oriented transversely to the surface of the first side 20 and / or the second side 22.

The central axis of the first portion 68 and / or the center axis of the central portion 68 may serve as a reference axis for indicating a displacement direction 72 of the offset and an offset distance 74 of the second portion 28 relative to the first portion 26 and / or the middle portion 50. More preferably, the center axis 70 defined by the second portion 28 is offset relative to the common reference axis defined by, for example, the first portion 26 and the center portion 50 in an offset direction 72, preferably parallel. In the embodiment, the offset direction 72 of the second portion 28 of the illustrated nozzle channel 24 is parallel to the transverse extent of the nozzle strip 18. The offset direction 72 is thus in the plane of the FIGS. 3a and 3c , The offset direction 72 can generally point in the direction defined by the longitudinal direction 42 and / or in the direction defined by the transverse extent 44. There may be an offset direction 72 for the second portions 28 of the nozzle channels 24 in the nozzle strip 18 according to FIG FIG. 2 be set or it can be set 72 a plurality of offset directions 72 of the second portions 28 of the nozzle channels. The nozzle channels 24 of the nozzle strip 18 of FIG. 2 may be similar to each other except for the offset direction 72 of the offset between the first portion 26 and the second portion 28. The offset direction 72, however, may be the same for all nozzle channels 24, for example.

The offset distance 74 may be, for example, between a minimum of 0.01 mm and a maximum of 0.3 mm. The diameter 52 of the first portion 26 may be, for example, from a minimum of 0.26 mm to a maximum of 1 mm. The diameter 54 of the second section may be, for example, from a minimum of 0.05 mm to a maximum of 0.2 mm. The offset distance 74 of the recesses centers of the first portion 68 and the center axis of the second portion 70 across the flow direction 30 is in any case greater than the manufacturing tolerance of the first portion 26 and the second portion 28 with respect to each other. The manufacturing tolerance can be, for example, 0.006 mm.

The offset distance 74 of the center axis of the first section 68 and the center axis of the second section 70 in the offset direction 72 is preferably less than or equal to half the difference of the diameter 52 of the first section and the diameter 54 of the second section. In the illustrated embodiment, the projection 76 of the second orifice 48 and the second wall surface 62 opposite to the first flow direction 30 on the first side within the first orifice 46 and within the second wall surface 62. This results in a kink-free nozzle channel with a simplified production.

The central axis 68 of the first portion 26 and the common center axis 68 of the first portion 26 and the central portion 50 and the central axis of the second portion 70 are transverse to the surface of the first side 20 and to the surface of the second side 22 in the illustrated embodiment.

The center section wall surface 64 is relative to first wall surface 60 in the in FIG. 3a shown cutting plane containing the central axis of the first portion 68, disposed at an obtuse angle 78. Alternatively, the center section wall surface 64 may also be disposed at an angle of 180 ° to the first wall surface 60. In such an embodiment, the first portion 26 may connect as a conical extension to the central portion 50, preferably seamlessly. The center section wall surface 64 may also be arranged at an angle of greater than 180 ° to the first wall surface 60. The second panel 62 is preferably relative to the mid-panel panel 64 in FIG FIG. 3a shown cut surface arranged in an obtuse angle 80.

Between the middle section wall surface 64 and the second wall surface 62, a second transition edge 82 is provided in the illustrated embodiment, the middle section 50 continuing through the sectional curve of the second lateral flow direction 38 limiting the second section 28 and contemplated continuing in the first flow direction 30 limiting truncated cone lateral surface is fixed.

By means of the mid-section panel 64, in the illustrated embodiment, an asymmetric guide surface is provided which acts upon the nozzle channel 24 with fluid from the first side to asymmetrically direct the fluid from the first wall surface 60 areas as the nozzle channel flows through in the first flow direction 30 arranged confluence 84 (opening) in the central portion wall surface 64, which is bounded by the transition edge 82, and into the second section 28 passes. The guide surface has a first guide surface section 86, which is arranged transversely to the first flow direction 30 in the offset direction 72, and a second guide surface portion 88, which is arranged transversely to the first flow direction 30 relative to the first guide surface portion 86. The baffle sections 86, 88 are disposed in the fluid flow path defined by the first section 26. The extension 90 of the first guide surface section 86 in the first throughflow direction 30 is preferably smaller than the extension 92 of the second guide surface section 88 in the first throughflow direction 30. The extent 94 of the first guide surface section 86 transversely to the first throughflow direction 30, in the offset direction 72 is preferably smaller than the extension 96 For example, the first fulcrum portion 86 and the second fulcrum portion 88 may be at the same initial spacing defined by the first portion 26 and center portion 50 between the first wall surface 60 and the mid-portion wall surface 64 98 to the first orifice 46 and surface 20 on the first side, respectively. However, the second baffle portion 88 preferably terminates in the first flow direction 30 downstream of the first baffle portion 86. There are formed along the first flow direction 30 staggered Leitflächenabschnitte 86, 88 which define two staggered stages of the cross-sectional taper of the flow channel.

By the staggered steps, a uniform flow through the nozzle channel 24 can be partially broken or swirled, whereby a particularly early-spraying jet 32 can be obtained.

At the first transition 100 from the first wall surface 60 to the middle section wall surface 64, a rounding 102 of the first transition 100 may be formed. Preferably, the rounding has a constant radius in the circumferential direction. An asymmetry of the nozzle channel 24 may thereafter preferably be limited to the arrangement of the second portion 28 relative to the first portion 26 and the middle portion 50 and optionally to the second transition 82.

At the second transition edge 82 from the middle section wall surface 64 to the second wall surface 62, a rounding 104 may be formed. The rounding 104 may have different rounding radii along the circumference of the second transition edge 82. In particular, in the case of such nozzle channels 24, whose second sections 28 have been produced by forming, impressing, embossing, stamping or shearing, an edge feed 104 may be formed on the second transition edge 82. In one embodiment, the second transition edge 82 has a radius of curvature or an edge indentation that is greater than the radius of curvature or the edge indentation of the first transition edge portion 106 lying opposite to the offset direction 72, that is to say the first transitional edge portion 106, in a first transition edge section 106 arranged in the offset direction 72. second transition edge portion 108. This asymmetry may additionally influence the flow behavior.

The first transition edge portion 106 lying in the offset direction 72 is preferably arranged at a first distance 110 from the second orifice 48 or the surface of the second side 22, which is larger than the second Distance 112 of the opposite second transition edge portion 108 from the second orifice 48 and the surface of the second side 22, respectively.

The second wall surface 62 is preferably transverse to the surface 22 of the nozzle strip on the second side. Around the second orifices 48, a hardening coating 114 is arranged. It is also possible that the nozzle strip material is cured.

In this way, the nozzle strip shown is particularly suitable for the use position for generating a spray jet and for the position of use for generating a solidification jet.

3d figure shows a further embodiment of a nozzle strip 18 with a nozzle channel 24 with an asymmetrically arranged to the first portion 26 and the central portion 50 second portion 28. In the following features of this embodiment are set forth. For the embodiment otherwise apply the explanations and reference numerals to the other figures. In this embodiment, the first wall surface 60 transitions into the center section wall surface 64 at an angle of 180 °. In particular, both the first wall surface 60 and the middle section wall surface 64 are bounded by a circumferentially closed portion of a truncated cone surface and have the same opening angle 56. Due to the configuration of the first portion 26 of the nozzle strip 18 according to embodiment in FIG 3d figure possibly thinner than the nozzle strip 18 in the other embodiments. This may for example be necessary on the surface of the first page 20 and / or the surface of the second side 22 one or more support layers (not shown) to be arranged and connected to the nozzle strip 18.

The nozzle strip according to Figures 1 to 3d is preferably in one piece. It is also possible that the nozzle strip 18 is composed for example of a plurality of superimposed layers. For example, the first portion 26 may be disposed in one layer and the middle portion 50 and the second portion 28 in a further layer.

FIG. 4 shows a schematic representation of a method for producing 116 of the nozzle strip 18 according to the invention, for example from the Figures 1 to 3d ,

In a step 118, a strip material is provided. The strip material may be a hardened material, such as hardened steel. The strip material may be cured on the second side. The strip material may have a hardened surface on the second side of a nozzle strip through a coating.

In a further step 120, a first recess is disposed in a first side of the strip material having a first diameter and a bottom. As a result, a first orifice 46 is created on the surface of the first side 20 and a first recess. The first recess can be created for example by arranging a bore, or by laser or erosion. Through the bore axis or the working axis of the laser or erosion device can for the first recess a central axis 68 are determined. The first recess preferably forms the first portion 26 and the middle portion 50 in the finished nozzle strip 18.

In a further step 122, a second recess is arranged in the bottom and in the second side 22. Particularly preferably, the production of the second recess in the bottom and in the second side is done by punching, shearing, forming, indenting or embossing. Preferably, the working portion of the tool for producing the second recess, for example, the working portion of a punch or a Eindrückwerkzeugs, arranged in the first recess and the second recess produced. The working portion of the tool for producing the second recess, for example the punch or the Eindrückwerkzeugs, preferably has an axis of symmetry, wherein the working portion with respect to this symmetry axis is preferably arranged offset parallel to the central axis of the first recess. The second recess may also be created by placing a second bore in the bottom of the first recess in the second side.

The strip material can be reworked in a further step 124. In this case, the strip material can be ground or polished, for example, on the second side of the strip material.

On the surface of the second side, a hardening coating can be applied. In an exemplary embodiment in which the second orifice 48 or the edge at the second orifice 48 has already been formed by the arrangement 122 of the second recess or only in a subsequent processing step, for example by grinding the second side, the area around the second orifice 48 and the edge at the second orifice 48, respectively, can be machined by grinding, polishing and / or applying a hardening coating.

A nozzle strip 18 for the production of a sprayed jet and a production method 116 of the nozzle strip 18 are indicated. A nozzle channel 24 of the nozzle strip 18 extends from the first side 20 to the second side 22 of the nozzle strip 18 and defines a flow direction 30, 38 fixed. A second section 28 of the nozzle channel 24 is offset relative to a first section 26 transversely to the flow direction 30, 38. Preferably, the nozzle channel 24 is funnel-shaped with a central portion 50 tapering in the direction from the first side 20 to the second side 22 with a single, asymmetrically arranged funnel neck formed by the second portion 28. The nozzle strip 18 may be provided, for example, by locating 120 a bore having a conically tapered bottom in a strip material and placing a recess 122 in the bottom of the bore with a punch or indenting tool having transversely offset center axes of the bore and recess. LIST OF REFERENCE NUMBERS 10 nozzle beam 12 Recess of the nozzle beam 14 pressure side 16 support surface 18 jetstrips 20 First page / surface of the first page 22 Second page / surface of the second page 24 nozzle channel 26 first section 28 Second section, nozzle 30 First flow direction 32 Early spraying beam 34 feed direction 36 Web Wirrfasergelege, solidified textile 38 Second flow direction 40 shot-peening 42 longitudinal extension 44 transverse extension 46 First estuary 48 Second estuary 50 midsection 52 Diameter of the first section 54 Diameter of the second section 56 opening angle 58 channel wall 60 First wall surface 62 Second wall surface 64 Mid-section wall surface 66 circumferentially 68 Center axis of the first section / middle section 70 Central axis of the second section 72 offset direction 74 offset distance 76 projection 78 Dull angle 80 Dull angle 82 Second transition edge / second transition 84 Mouth / opening 86 First baffle section 88 Second fuselage section 90 Extension of the first guide surface section along 92 Extension of the second guide surface section along 94 Extension of the first Leitflächenabschnitt across 96 Extension of the second Leitflächenabschnitts transversely 98 initial distance 100 First transition 102 curve 104 Rounding / edge rollover 106 First transition edge section 108 Second transition edge section 110 First distance 112 Second distance 114 coating 116 Process for the preparation 118 Provide 120 Arranging a hole 122 Arranging a second recess 124 rework

Claims (15)

1. Nozzle strip (18) for a textile processing machine, wherein the nozzle strip (18) has a first side (20) and a second side (22), and
   a nozzle channel (24) which establishes a first flow direction (30) and/or a second flow direction (38) and comprises a first portion (26) and a second portion (28), wherein the nozzle channel (24) extends from the first side (20) to the second side (22), and
   wherein the second portion (28) is offset relative to the first portion (26) transversely to the first flow direction (30) and/or to the second flow direction (38).
2. Nozzle strip (18) according to claim 1, wherein the first portion (26) and the second portion (28) each establish a central axis (68, 70), wherein the central axis (68) of the first portion (26) is offset parallel to the central axis (70) of the second portion (28).
3. Nozzle strip (18) according to at least one of the preceding claims, wherein the first portion (26) has a diameter (52) and wherein the second portion (28) has a diameter (54), wherein the offset between the first portion (26) and the second portion (28) is less than or equal to half the difference between the diameter (52) of the first portion (26) and the diameter (54) of the second portion (28).
4. Nozzle strip (18) according to at least one of the preceding claims, wherein the first portion (26) is longer than the second portion (28) in the first and/or second flow direction (30, 38).
5. Nozzle strip (18) according to at least one of the preceding claims, wherein a central portion (50) is arranged between the first portion (26) and the second portion (28), wherein the central portion (50) has a central portion wall face (64) which delimits this transversely to the first flow direction (30), and wherein the nozzle channel (24) tapers in the first flow direction (30) in the central portion (50).
6. Nozzle strip (18) according to claim 5, wherein the central portion wall face (64) is configured so as to form an asymmetric guide face (86, 88) in the first flow direction (30) for the fluid in the nozzle channel (24).
7. Nozzle strip (18) according to at least one of claims 5 or 6, wherein the central wall face (64) has a first guide face portion (86) and a second guide face portion (88), wherein the second guide face portion (88) has a greater extension (92) in the first flow direction (30), wherein the second guide face portion (88) ends after the first guide face portion (86) in the first flow direction (30).
8. Nozzle strip (18) according to at least one of claims 5 to 7, wherein the central portion wall face (64), in longitudinal section through the nozzle channel (24), falls away evenly from the first portion (26) to the second portion (28).
9. Nozzle strip (18) according to at least one of claims 5 to 8, wherein the first portion (26) has a first wall face (60), the second portion (28) has a second wall face (62), and the central portion (50) has a central portion wall face (64), said faces delimiting said portions transversely to the first and/or second flow direction (30, 38), and wherein the transition (82) between the second wall face (62) and the central portion wall face (64) has a reflex angle (80), and/or wherein the transition (100) between the first wall face (60) and the central portion face (64) has an obtuse angle (78).
10. Nozzle strip (18) according to at least one of claims 5 to 9, wherein the central portion (50) is delimited by the casing surface of a truncated cone, wherein the central axis (68) established by the frustoconical casing surface coincides with a central axis (68) established by the first portion (26).
11. Nozzle strip (18) according to at least one of claims 5 to 10, wherein the central portion (50) has an opening angle (56) from 110° to 175°, for example around 130°.
12. Nozzle strip (18) according to at least one of the preceding claims, wherein the nozzle strip (18) on the second side (22) has a hardened surface in the region of the second portion (28).
13. Nozzle strip (18) according to at least one of the preceding claims, wherein the second portion (28) is offset in a longitudinal extension direction (42) and/or a transverse extension direction (44) of the nozzle strip.
14. Nozzle strip (18) according to at least one of the preceding claims, wherein the first portion (26) and the central portion (50) are made by arranging a bore in a strip material, preferably in one work process.
15. Method (116) for production of a nozzle strip (18) according to at least one of claims 1 to 14, wherein the method (116) comprises the steps:

    - provision (118) of a preferably hardened material with a first side and the second side,

    - arrangement (120) of a first recess, for example a bore, with a base in the material on the first side, wherein the first recess establishes a central axis which is for example a bore axis,

    - production (122) of a second recess, transversely offset to the central axis, in the base of the first recess by punching, shear cutting, forming, impressing and/or embossing.

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