EP1060302B1 - Yarn processing device and use thereof - Google Patents

Description

Technical field

The invention relates to a yarn treatment device with a preferably detachable device Screw connection of split treatment bodies, which are made of highly wear-resistant, consist in particular of ceramic material, furthermore the use the same.

State of the art

The treatment of continuous filament yarn has two main tasks. To the One is the textile, made from industrially produced filaments Character and textile properties are given. Second is the yarn with regard to specific quality characteristics for further processing and / or treated for the end product. Some yarn qualities have to be produced which are not the case with products made with natural fibers necessary and unreachable. The areas of application are industrial Processing of textiles e.g. for the construction sector, automobile construction, but also for carpet production and for special textile products in the context of sports and Leisure industry. Furthermore, spun yarn is said to have certain preparations for the treated the best possible industrial processing and the processing process for Yarns and fabrics are optimized. Optimizing here also means preservation or increasing certain quality criteria and reducing production costs, which includes downtimes along the entire processing route.

Various treatments are part of the filament spinning, so the preparation and the finishing of yarn via yarn treatment nozzles is an important section. The structural change from plain yarn to textured or interlaced yarn becomes caused by mechanical air forces, in the first case an air flow in the supersonic area and in the second case a double vortex flow is generated. Air treatment nozzles are used to improve the structure of a yarn. A very demanding process is the improvement of quality through a Hot steam treatment e.g. for relaxing as part of a stretching process, or after another previous procedural intervention. in all cases the nozzle body made of highly wear-resistant material, otherwise their Life would be much too short. The main source of problems for yarn treatment nozzles lies during preparation. The yarn is immediately after the spinning process or the production of individual filaments, provided with protective substances. The Protective substances are said to be an aid to subsequent processing. The for the Preparations used result in an oily sliding property, so that the sliding friction of the yarn as low as possible all the way through the processing remains, the risk of damage or yarn breakage is reduced, and abrasion on the sliding surfaces of the transport and processing systems as small as possible can be held. But there are a number of other factors which are favorably influenced by the preparation or the preparation agents, so e.g. electrical charges. A wide area is protection against fungal attack by the Yarns during storage, between the different processing stages. The factors mentioned already give an impressive picture of the Practical conditions for yarn treatment bodies. The interaction of pressure, Heat, moisture and a variety of chemical substances in the preparation cause very aggressive local conditions for the material of the Yarn treatment nozzles, but above all for every lanyard on the Nozzles. The new solution is primarily aimed at the type of shared, especially of two-part yarn treatment nozzles, where each part is preferred Has recesses, be it for a yarn channel or a treatment chamber. When assembling the parts should fit exactly. Furthermore, lateral Sliding movements in relation to the yarn path for precise positioning should be avoided if possible.

Presentation of the invention

The invention was based on the object, yarn treatment nozzles or To develop yarn treatment bodies that are as insensitive as possible allow preparation and a long service life. It was part of the particular Task of creating a nozzle connection for split yarn treatment bodies, which allows quick and precise positioning, and for highly wear-resistant Materials such as ceramics can also be used for thermal treatments.

The solution according to the invention is characterized in that the connection of divided nozzles has at least one dowel pin, which at least in one held first body part with mechanical clamping means or holding means, and in a second is passed through a fitting hole for positioning and assembly / disassembly in the axial direction of the dowel pin connection.

It has been recognized by the inventors that a nozzle with connecting means only then remains operationally safe if the nozzle, pressure, heat, steam or chemical substances withstands. Not all practical problems could be solved using the previous glue connections solved satisfactorily. Glue connections can also only be examined to this extent when the practical conditions are already known. A glue connection However, its composition cannot be determined with regard to the attack of still unknown chemicals that will be used in the future, if at all with additional warmth and moisture. Preferred with the new Solution the connecting means in a common orientation, preferably in alignment arranged with the yarn path. Surprisingly, with a corresponding Pin connection can be determined that the compared to the prior art whole nozzle body considerably smaller, built in a miniaturized form, as it were can be. Especially when using a double nozzle or several Nozzles next to each other, the division between two adjacent yarn runs is essential selectable smaller than before. In some applications this even has one Reaction on the godet size. Can on the same machine size through the possibility of miniaturization, thanks to the new connection, additional Twine runs provided and the overall performance of the machine increased accordingly become. This means that the otherwise used in watch technology Lanyard as an assembly / disassembly aid as well as the linear one Application brings unexpected benefits. The forceful cohesion of the parts can as in the prior art by a classic screw connection be ensured. The new solution is particularly useful when used as Swirling nozzle and as a thermal treatment body and, as shown becomes very advantageous as a migration nozzle.

The invention allows a number of particularly advantageous configurations. It for this purpose, reference is made to claims 2 to 12. To be joined in two According to a particularly preferred solution, two dowel pins are shared used. On the one hand, there are essentially identical fitting holes and on the other hand, a fitting hole and an elongated hole fitting hole. It will taken into account that the highly wear-resistant materials, above all Ceramics, not only very difficult to work with, but in terms of Different temperature influences in relation to metallic materials Have dimensions. The clamping means or holding means for the dowel pins can be one Tension spring or an open tension ring. It is proposed to the Dowel pins for each clamping ring to make a corresponding groove in such a way that the clamping ring diameter during assembly and disassembly of the dowel pins can be reduced by an external force. It is also possible to use instead of one Tension spring a portion of the pins e.g. compressible due to different hardness train, so that a mechanical compression instead of a tension spring inside a hole enlargement can be used. The dowel pins are preferred in the Miniaturized or needle-shaped diameter. The alignment pin has primary a positioning function. The positioning pin only needs to be so strong for positioning be dimensioned so that it is not damaged when assembling the parts, hardly any forces occur on the dowel pins during the yarn processing process. The force connection is preferably made via a screw connection. According to Another design idea is in the nozzle body, in which the Dowel pin is held with the clamping means, an insertion cone attached to one Relief grinding or a bore extension for the clamping means or a Tension ring transferred as a holding shoulder, for longitudinal positioning of the dowel pin. The new solution is also ideal for periodic cleaning, which is often done with ultrasound.

The treatment body is in a two-part configuration as a nozzle plate and Cover plate formed, the dowel pins with the clamping means in the nozzle plate are preferably rotatably fixable. For this purpose, the cover plate has a Blind hole or a through hole with a slightly enlarged Diameter at the end of the hole and a fitting hole for the dowel pin in the Hole insertion part. The connection particularly preferably consists of two Dowel pins that have a very slight play in the assembled state Have fitting holes, such that the dowel pins, at least theoretically, still stay rotatable. It is also possible to fit the dowel pins on one side Arrange nozzle body slightly protruding such that the nozzle body lego can be plugged onto a base plate and in any number. The The use of two dowel pins has the great advantage that the connection in With regard to the positioning geometrically precise or within a narrow tolerance range is determined. This applies when using only one dowel if the screw connection itself has a fitting shoulder. When using more than two dowel pins can cause disadvantages with regard to the problem the expansion and manufacturing accuracy. This means that at extreme Two dowel pins are deliberately preferred to thermal loads. Is against given no or only a slight thermal load, two or more can Dowel pins are used. In the vast majority of applications at least one nozzle part, but preferably both nozzle parts made of ceramic Material and dowel pins made of high-strength steel or ceramic. The invention also relates to the use of the yarn treatment device. This is done on the Claims 13 and 14 referenced. Be for pens on both sides mechanical clamping means provided, then one side should be significantly weaker clamp so that the pin remains in a defined part.

Brief description of the invention

die Figur 1a

einen Garnbehandlungskörper im Schnitt in Explosionsdarstellung und

die Figur 1b

die Figur 1a in zusammengebautem Zustand;

die Figur 2a

eine Verwirbelungsdüse als Schnitt III - III der Figur 2b;

die Figur 2b

einen Schnitt IV - IV der Figur 2a;

die Figur 3

eine Anordnung mit verschiedenen Passstiften und Bohrungen;

die Figur 4a

die Nutzung der Stiftverbindung auch am Maschinenständer;

die Figur 4b

eine weitere Möglichkeit der Anordnung;

die Figur 5a

eine Dampfbehandlungsdüse als Schnitt I - I der Figur 5b;

die Figur 5b

eine Doppeldüse mit Dampfkammern als Schnitt II - II der Figur 5a;

die Figur 6

ein Übersichtsblatt mit verschiedenen Verfahrensschritten;

die Figur 7

eine Präparation mit anschliessender Migrationsdüse, je im Schnitt.

The new solution is explained in more detail below using several exemplary embodiments. In high magnification they show:

the figure 1a

a yarn treatment body in section in an exploded view and

the figure 1b

1a in the assembled state;

the figure 2a

a swirl nozzle as section III - III of Figure 2b;

the figure 2b

a section IV - IV of Figure 2a;

the figure 3

an arrangement with different dowel pins and holes;

the figure 4a

the use of the pin connection also on the machine stand;

the figure 4b

another possibility of arrangement;

the figure 5a

a steam treatment nozzle as section I - I of Figure 5b;

the figure 5b

a double nozzle with steam chambers as section II - II of Figure 5a;

the figure 6

an overview sheet with various process steps;

the figure 7

a preparation with a subsequent migration nozzle, each on average.

Ways and implementation of the invention

Figures 1a and 1b show a two-part air treatment body 1 in section, Figure 1a in the sense of an exploded view. The treatment body consists of a nozzle plate 3 and a cover plate 2. Both parts can be rigidly connected to the air treatment body 1 with a screw 4 (FIG. 1b). For exact positioning, in particular as an assembly / disassembly aid, the nozzle plate 3 and the cover plate 2 are secured with two dowel pins 5, 5 'against shifting in one plane (designated X-X in FIG. 1b) in accordance with arrow 6. The dowel pins 5, 5 'shown have a double function in the example shown. In addition to the positioning of the nozzle plate and cover plate with respect to one another, they also serve to fix the entire air treatment nozzle 1 locally on a processing machine 7 (not shown). The dowel pins 5, 5 'are already installed in one of the nozzle parts by the manufacturer. It is important that it is not based on a glue, weld or solder connection, but that the mechanical clamping means result in anchoring in the material of the air treatment body. Lv denotes the air treatment side of the two parts, Mm the machine assembly side. The dowel pins 5, 5 'have a fitting shaft 8 and an impact end 9. A tension spring or tensioning ring 10 represents the mechanical clamping means. For the tensioning ring 10, an undercut 11 which is approximately similar to the tensioning means is attached in the nozzle plate 3 following an insertion cone 12. The insertion cone 12 facilitates the automatic assembly of the dowel pins. The nozzle plate 3 has two fitting bores 13. The dowel pin 5 can also be inserted into the through hole 14 by hand until the clamping ring 10 is present at the constriction of the insertion cone. The rest of the movement for the insertion of the dowel pin 5 can be carried out with a light blow, for example using a rubber hammer, so that the tension spring 10 springs into the relief. In the fully assembled state, the dowel pin 5 protrudes on both sides, as indicated by P _D (positioning of nozzle parts) and PM (positioning on the machine). The counterpart to the nozzle plate 3 is the cover plate 2, which has an identical distance A corresponding to two axially parallel fitting bores 15 and 16. The fitting bore 15 can be a normal cylindrical bore with a diameter D, on the other hand the second is preferred, as an elongated hole D _L with some longitudinal play in the direction of the dimension A for the expansion of the body under the action of heat. The assembly of both parts 2, 3 happens for the first time at the manufacturer. In user operation, for example, for cleaning the parts after loosening the screw 4, the parts can be taken apart in the axial directions of the dowel pins. Another great advantage of the proposed solution is that later recycling is improved due to the easy separability of the parts and each material can be processed separately. This is also important because the yarn treatment nozzles are wearing parts.

FIGS. 2a and 2b show a special shape of a yarn channel 20 for the intermingling of yarn with compressed air or another medium. The location for a compressed air connection is marked with D _L , the compressed air of, for example, 1 to 6 bar being introduced into the yarn channel 20 via a compressed air supply bore 21. The two dowel pins 5, 5 'are preferably arranged on a common straight line 22 (VE) together with the screw 4. As a result, the fitting connection and the force connection are optimal, and allows a particularly narrow division for the yarn run (as can be seen from FIG. 5b).

FIG. 3 shows further design options for the pin connection. On the on the right side of the figure protrudes the dowel pin 5 'corresponding to Figure 1. Die Fitting bore 15 ends with a blind hole 30, which has a defined configuration the fitting hole 15 is used. On the left side of the picture is the alignment pin 5 as the second one Variant in the area of the impact point flush with the corresponding nozzle part. Instead of a blind hole 30, a through hole 30 'has been drilled. Depending on The requirement may be one or the other, or both used on the same nozzle become. Another great advantage can be seen from the variations shown. The Both basic bodies of the yarn treatment nozzles are made of a highly wear-resistant and very expensive material, especially ceramic. The holes or seats for the clamping means can in relation to the diameter and Diameter ratios are standardized or automated. The Dowel pins, on the other hand, can be used as inexpensive decollage parts in various lengths be manufactured for the respective application.

4a shows the positioning of a two-part nozzle body 1 or 40, as well as the local fixation on a machine 7. FIG. 4b shows an example of how on a base support 7 two yarn treatment bodies 1 and 40 mirror images can be assembled.

FIGS. 5a and 5b show a thermal treatment body 40 which has two pass-through chambers 41, 41a, particularly for the treatment of yarn with hot steam or hot air. Each flow chamber has a yarn inlet 42, a yarn outlet 43 and a medium feed opening 44 in the central region. If the medium is hot steam, at today's very high yarn transport speeds there are extremely aggressive conditions together with the preparation on the yarn. What is particularly interesting about the example shown is that the two flow chambers or steam chambers have a considerably large longitudinal dimension KL, which is dependent on the work process or must be determined on a case-by-case basis. As can be seen from FIG. 5b, the yarn treatment body 40 has not only one but two flow chambers 41 and 41a. With the new design of the connecting means, the two chambers can be built particularly close to each other. If many parallel yarn runs are required, this is particularly advantageous because the division T between two adjacent yarn runs can be chosen to be extremely small. The dowel pin and screw connection is preferably applied on a line 22 parallel to the yarn path. A further yarn treatment nozzle is indicated by dash-dotted lines in FIG. 5b, with f ₁ f ₂ , f ₃ each marking a thread run. The treatment body 40 shown is symmetrical, so that the thread running direction is irrelevant. The medium supplied via the feed opening 44 can leave the continuous steam chamber via the yarn inlet 42 and the yarn outlet 43. If only one steam treatment position is used, the amount of steam is still small and can flow into the room. However, if many steam positions are used in the same room, the hot steam from the flow chamber 41, 41 a must be collected and removed. This can be done via steam outlet bores 44, 44 'and a steam manifold 45. One or more positions are advantageously surrounded by a common steam collecting housing 46. A very important aspect is the medium flow into the flow chamber and also out of the flow chamber. The characteristic of a classic yarn finishing nozzle is that the compressed air is bundled into the yarn channel as a strong air jet to generate a very specific flow. The situation with the new thermal treatment body is completely different. A radiation effect should be avoided here. In FIG. 5b, the chamber length is denoted by KL and the length of the medium feed opening 44 by DZL. The length DZL in the example shown is more than a third of the length KL. Steam can also be supplied through several holes. It is important to avoid any directional blasting effect by the thermal medium during the thermal treatment, be it hot air, hot steam or any hot medium mixture, which can also contain preparation agents, for example.

Th. Vor.

bedeutet thermische Vorbehandlung evtl. nur mit Garnerhitzung.

G.mech.

bedeutet Garnbehandlung mit der mechanischen Wirkung einer Druckluftströmung (Überschallströmung).

Th. Nach.

bedeutet thermische Nachbehandlung mit Heissdampf (evtl. nur Wärme bzw. Heissluft).

In the following, reference is now made to FIG. 6, which shows an overview for different finishing stages. On the left part of the picture, a texturing process is shown from top to bottom and a swirling process on the right. For the texturing process, reference is made to WO97 / 30200. Smooth yarn 100 is guided from above via a first delivery unit LW1 at high transport speed V1 to a texturing nozzle 101 and through the yarn channel 104. Via compressed air passages 103 which are connected to a compressed air source P l, highly compressed air is blown at an angle in the direction of transport of the yarn into the yarn 104th Immediately thereafter, the yarn channel 104 is opened conically such that a supersonic flow, preferably with more than Mach 2, is established in the conical section 102. The shock waves generate the actual texturing, as described in detail in WO97 / 30200. The first section from the air injection point 105 into the yarn channel 104 to the first section of the conical extension 102 serves to loosen and open the plain yarn so that the individual filaments are exposed to the supersonic flow. Depending on the level of the available air pressure (9 ... 12 to 14 bar and more), the texturing takes place either within the conical part 102 or in the outlet area. There is a direct proportionality between Mach number and texturing. The higher the Mach number, the stronger the impact and the more intense the texturing. There are two critical parameters for the production speed: firstly the desired quality standard and secondly the slagging, which leads to a breakdown of the texturing if the transport speed is further increased.

Th. Before.

means thermal pretreatment possibly only with yarn heating.

G.mech.

means yarn treatment with the mechanical effect of a compressed air flow (supersonic flow).

Th. After.

means thermal aftertreatment with hot steam (possibly only heat or hot air).

FIG. 7 shows a section of a yarn treatment, with the chemical preparation and a migration is shown on the right. The yarn 100 ' comes directly from a spinning process and is via a preparation device 120 guided, which has a base body 121, in which a feed channel 122nd for the preparation is guided from below to the area of the thread path and ends with the so-called preparation lips 123. Over the preparation lips are arranged in a U-shape two guide webs 124, which the yarn 100 'laterally run over the preparation lips 123. The base body 121 preferably has one curved guide groove 125, such that the thread run gently over the place the contacting of the yarn 100 'with the preparation is forced. The preparation agent is applied to the yarn in the manner of a Mitreisseffektes. Because in the supply channel 122 the preparation agent is only under Pressure is, as a safe reflow is guaranteed, it is not possible for everyone Wetting filaments of the yarn evenly. The result is that the yarn over the Do not apply sufficient preparation liquid to the preparation lips can be. Depending on the type of preparation, it sometimes dries on one side applied preparation film quickly, so that the effectiveness remains reduced. The inventors have now recognized that this solves this problem can be that the yarn 100 'shortly after the preparation at a distance FA is subjected to a more intensive vortex flow. One has proven to be optimal Double vortex flow has been shown to ensure thorough mixing of the preparation in the whole yarn composite and at the same time a crossing of the filaments in the Thread creates. As a rule, turbulence knots should be avoided. The Migration nozzle is only half the job in terms of swirling. The Yarn is opened by the double vortex flow and the individual filaments crossed against each other.

Claims (14)

1. Yarn processing device with a preferably detachable screw connection of separate processing members made of highly wear resistant material, in particular made of ceramic material, characterised in that the connection comprises at least one alignment pin (5, 5') held in a first member component (3) by mechanical clamping means (10) and guided in a second member component (2) through an alignment hole (13) for positioning and assembly/disassembly in the axial direction of the alignment pin connection.
2. Yarn processing device according to claim 1, characterised in that the connection comprises two axially parallel alignment pins (5, 5').
3. Yarn processing device according to claim 1,-characterised in that the connection comprises at least one screw connection (4) and at least one or two axially parallel alignment pins (5, 5'), the connecting means being arranged in a line parallel to the thread course in the processing member.
4. Yarn processing device according to any of claims 1 to 3, characterised in that a substantially identical alignment hole (13) is provided in each of the two processing members themselves to be connected and a second alignment hole designed as a slot alignment hole is provided in a spinneret member.
5. Yarn processing device according to either of claims 1 or 4, characterised in that the clamping means comprise a tension spring (10) or an open tension ring or a compression zone, and the alignment pins are preferably miniaturised in diameter or designed so as to be needle-shaped, a corresponding groove being provided on the alignment pins for each tension ring in such a way that the diameter of the tension ring can be reduced during assembly and disassembly of the alignment pins owing to an external force.
6. Yarn processing device according to any of claims 1 to 5, characterised in that an insertion cone (12) is provided in the processing member in which the alignment pin is held by the clamping means, the insertion cone (12) passing into a relief for the clamping means or a tension ring as a retaining shoulder for longitudinal positioning of the alignment pin.
7. Yarn processing device according to any of claims 1 to 6, characterised in that the processing member is designed in two parts as spinneret plate (3) and cover plate (2), the alignment pins being fixable by the clamping means, preferably in the nozzle plate, particularly preferably so as to be rotatable.
8. Yarn processing device according to any of claims 1 to 7, characterised in that the cover plate (2) has a blind hole or through-hole with a slightly enlarged diameter at the hole end and an alignment hole for the alignment pin in the hole insertion part.
9. Yarn processing device according to any of claims 1 to 8, characterised in that the connection consists of two alignment pins (5, 5'), both alignment pins preferably projecting at one side of the yarn processing spinneret for a second positioning function.
10. Yarn processing device according to any of claims 1 to 9, characterised in that at least one processing member component, preferably both processing member components, are made of ceramic material and the alignment pins are made of high-strength steel or ceramic.
11. Yarn processing device according to claim 1, characterised in that for heat treatment it comprises a processing member with a through-chamber (20) with a yarn entry and yarn exit aperture for the free passage of the yarn and a feed duct with large cross-section, in particular for steam; the steam feed duct with a large cross-section preferably extending as a slot over at least 20% of the length of the steam box.
12. Yarn processing device according to any of claims 1 to 11, characterised in that it is designed as a double spinneret with two parallel yarn passages, the two spinneret halves being designed symmetrically in both processing member halves.
13. Use of the yarn processing device according to claim 1, upstream and/or downstream of an air processing nozzle for thermal yarn processing, the thermal effect of a hot gaseous medium, in particular of hot steam, being used, or as a yarn intermingling nozzle.
14. Use of the yarn processing device according to claim 1, upstream and/or downstream of an air processing nozzle for texturing or intermingling, for thermal yarn processing, the thermal yarn processing taking place in a processing member with a through-steambox.

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