WO1999045185A1

WO1999045185A1 - Yarn processing device and use thereof

Info

Publication number: WO1999045185A1
Application number: PCT/CH1999/000097
Authority: WO
Inventors: Helmut Ritter; Patrick BUCHMÜLLER; Gotthilf Bertsch; Erwin Schwarz
Original assignee: Heberlein Fibertechnology, Inc.
Priority date: 1998-03-03
Filing date: 1999-03-03
Publication date: 1999-09-10
Also published as: WO1999045182A1; GB9814943D0; DE19809600C1; GB2334971A

Abstract

The invention relates to a pin assembly which keeps single-piece, two-piece or multi-pieced yarn processing elements, especially yarn interlacing spinnerets or thermal treatment elements, in an exact position during an entire service life despite the extreme effects of preparations used. Instead of a traditional soldered joint or an adhesive connection, mechanical clamping means are used to fix the dowel pins to one part of the spinneret. Fixation of the dowel pins is not affected by heat or chemical preparations. The clamping means consists of a simple clamping ring holding the dowel pin in position directly inside the body of the spinneret between the clamping pin and an after-body. The novel positioning solution can be used with individual parts of spinnerets, parts of spinnerets in machines or multiple parts of spinnerets. The dowel pins enable the entire spinneret to be substantially miniaturized and allow narrow separation between various yarn runs, which was previously impossible. The invention can be used advantageously in interlacing spinnerets or in steam treatment elements.

Description

Yarn treatment device and use thereof

Technical field

The invention relates to a yarn treatment device with a preferably detachable screw connection of divided treatment bodies, which consist of highly wear-resistant, in particular ceramic material, and the use thereof.

State of the art

The treatment of continuous filament yarn has two main tasks. On the one hand, the yarn, made from industrially produced filaments, should be given a textile character and also textile properties. Secondly, the yarn is treated with regard to specific quality characteristics for further processing and / or for the end product. Some yarn qualities have to be produced, which are not necessary for the products made with natural fibers and cannot be achieved. The areas of application are in the industrial processing of textiles e.g. for the construction sector, automobile construction, but also for carpet production and for special textile products in the sports and leisure industry. Furthermore, spun yarn is to be treated with certain preparations for the best possible industrial processing and the processing process for yarns and fabrics is to be optimized. Optimizing here also means maintaining or increasing certain quality criteria and reducing production costs, which includes downtimes along the entire processing route.

Various treatments such as the preparation and finishing of yarn via yarn treatment nozzles are an important part of the filament spinning mill. The structural change from plain yarn to a textured or interlaced yarn is 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. Air treatment nozzles are used to improve the structure of a yarn. A very demanding process is the improvement of quality through treatment with hot steam, for example for relaxing in the course of a stretching process, - 2 -

or after another previous procedural intervention. In all cases, the nozzle bodies are made of highly wear-resistant material, otherwise their service life would be much too short. The main source of problems for yarn treatment nozzles lies in the preparation. The yarn is provided with protective substances immediately after the spinning process or the production of individual filaments. The protective substances should be an aid for the subsequent processing. The substances used for the preparation result in an oily sliding property, so that the sliding friction of the yarn remains as low as possible all the way through processing, the risk of damage or yarn breakage is reduced, and the abrasion on the sliding surfaces of the transport and processing systems is as small as possible can be kept possible. However, there are a number of other factors that are influenced by the preparation or the preparation, e.g. electrical charges. A wide area is the protection against fungal attack of the yarn during the storage periods, between the different processing stages. The factors mentioned already give an impressive picture of the practical conditions for yarn treatment articles. The interaction of pressure, heat, moisture and a variety of chemical substances in the preparation cause locally very aggressive conditions for the material of the yarn treatment nozzles, but above all for every connecting agent on the nozzles. The new solution is aimed primarily at the genus of divided, especially two-part yarn treatment nozzles, in which each part preferably 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 should be avoided as far as possible for precise positioning.

Presentation of the invention

The invention was based on the object of developing yarn treatment nozzles or yarn treatment bodies which are as insensitive as possible with regard to the preparation and which allow a long service life. It was in particular part of the task to create a nozzle connection for split yarn treatment copers, which allows quick and precise positioning, and can also be used for highly wear-resistant materials such as ceramics and thermal treatments.

The solution according to the invention is characterized in that the connection of divided nozzles has at least one dowel pin, which is held at least in a 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

The inventors have recognized that a nozzle with connecting means only remains operationally reliable if the nozzle, pressure, heat, steam or chemical substances can withstand not all practical problems could be solved satisfactorily using the previous glue connections. Glue connections can also only be examined if the practical conditions are already known. However, the composition of a glue connection cannot be determined with regard to the attack by as yet unknown chemicals that will be used in the future, possibly with additional heat and moisture. The new solution preferably uses a joint alignment, preferably aligned with the yarn path . Surprisingly, it was found with a corresponding pin connection that, compared to the prior art, the entire nozzle body can be built considerably smaller, as it were, in a miniaturized form. Especially when using a double nozzle or several nozzles next to each other, the division between two adjacent yarn runs can be selected much smaller than before. In some applications this even has an effect on the godet size. Thanks to the possibility of miniaturization, thanks to the new connection, additional yarn runs can be provided on one and the same machine size and the overall performance of the machine can be increased accordingly.This means that the connection means otherwise used in watch technology as assembly / disassembly aids and the hien-shaped application are unexpected Brings advantages. As in the prior art, the force-related cohesion of the parts can be ensured by a classic screw connection. The new solution is particularly advantageous when used as a swirl nozzle and as a thermal treatment body and, as will be shown, as a migration nozzle.

The invention allows a number of particularly advantageous configurations. Reference is made to claims 2 to 1 2. In two parts to be connected, two dowel pins are used according to a particularly preferred solution. On the one hand, essentially identical fitting holes and on the other hand a fitting hole and an elongated hole fitting hole are made. that the highly wear-resistant materials, especially ceramics, are not only very difficult to machine, but also have different dimensions in relation to temperature influences in relation to metallic materials. The clamping means or holding means for the dowel pins can be one - 4 -

Tension spring or an open tension ring For this purpose, it is proposed to provide a corresponding groove on the dowel pins for one tension ring each such that the tensioning diameter can be reduced during assembly and disassembly of the dowel pins by an external force effect To make pins compressible, for example, by different hardnesses, so that mechanical compression instead of a tension spring can be used within a bore enlargement. The dowel pins are preferably miniaturized or needle-shaped in diameter. The dowel pin has a positioning function. For the positioning, the dowel pin only has to be dimensioned so strong that it is not damaged during the assembly of the parts, during the yarn processing process there are hardly any forces on the dowel pins. The force connection is preferably made via a screw connection. According to a further design idea, an insertion cone is attached to the nozzle body in which the dowel pin is held with the clamping means, which conveys into a relief or a bore extension for the clamping means or a clamping ring as a holding shoulder, for long positioning of the dowel pin. The new solution is also ideally suited for periodic cleaning, which is often carried out using ultrasound.

The treatment body is designed in a two-part configuration as a nozzle plate and cover plate, the dowel pins being preferably rotatably fixable with the clamping means in the nozzle plate. 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 which, even in the assembled state, have very little play in the dowel hole in such a way that the dowel pins remain, at least theoretically, still rotatable. Furthermore, it is possible to arrange the dowel pins slightly protruding on one side of a nozzle body in such a way that the nozzle bodies can be attached to a base plate in a lego-like manner and also in any number. The use of two dowel pins has the great advantage that the connection is determined geometrically precisely or within a narrow tolerance range with regard to the positioning.This applies when using only one dowel pin if the screw connection itself has a dowel shoulder Disadvantages of more than two dowel pins can arise with regard to the problem of expansion and manufacturing accuracy. This means that in the case of extreme thermal loads, two dowel pins are deliberately preferred. If there is no or only a slight thermal load, two or more can be given - 5 -

Dowel pins are used. In the vast majority of applications, at least one nozzle part, but preferably both nozzle parts, are made of ceramic material and the dowel pins are made of high-strength steel or ceramic. The invention further relates to the use of the yarn treatment device. For this purpose, reference is made to claims 13 and 14. If mechanical clamping means are provided for pins on both sides, then one side should clamp significantly weaker so that the pin remains in a defined part.

Brief description of the invention

The new solution is explained in more detail below using several exemplary embodiments. 1a shows a yarn treatment body in section in an exploded view and FIG. 1b shows FIG. 1a in the assembled state; FIG. 2a shows a swirl nozzle as section III-III of FIG. 2b; Figure 2b shows a section IV - IV of Figure 2a; 3 shows an arrangement with different dowel pins and holes; FIG. 4a the use of the pin connection also on the machine stand; 4b shows a further possibility of arrangement; Figure 5a shows a steam treatment nozzle as section I - I of Figure 5b; Figure 5b shows a double nozzle with steam chambers as section II - II of Figure 5a; FIG. 6 shows an overview sheet with various process steps; 7 shows a preparation with a subsequent migration nozzle, each in section.

Ways and implementation of the invention

Figures 1 a and 1 b show a two-part air treatment body 1 in section, Figure 1 a 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 (denoted by 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 relative to one another, they also serve to fix the entire air treatment nozzle 1 locally on a processing machine (not shown) 7. The dowel pins 5, 5 'are already installed in one of the nozzle parts by the manufacturer. It is important that glue, sweat is not applied - or - 6 -

Solder connection is supported, 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 tensioning spring or tensioning ring 10 represents the mechanical clamping means. For the tensioning ring 10, a shoulder grind 1 1 which is approximately similar to the tensioning means is attached in the nozzle plate 3 following an insertion cone 1 2. The insertion cone 1 2 facilitates the automatic assembly of the dowel pins. The nozzle plate 3 has two fitting bores 1 3. The dowel pin 5 can also be inserted into the through hole 1 4 by hand until the clamping ring 10 is at the constriction of the insertion cone. The rest of the movement for the insertion of the dowel pin 5 can be done with a flick e.g. by means of a rubber hammer, so that the tension spring 10 jumps into the hammer joint. In the fully assembled state, the dowel pin 5 protrudes on both sides, as indicated by PD (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 1 5 and 1 6. The fitting bore 1 5 can be a normal cylindrical bore with a diameter D, but the second is preferred, as an elongated hole DL 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 takes place for the first time at the manufacturer. In user operation e.g. For cleaning the parts after loosening the screw 4, the parts are taken apart in the axial directions of the dowel pins. Another great advantage of the proposed solution is that the later recycling is improved by 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 swirling of yarn with compressed air or another medium. The location for a compressed air connection is marked with DL, whereby the compressed air of e.g. 1 to 6 bar is 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. This makes the fitting connection as well as the force connection 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 - 7 -

Fitting hole 1 5 ends with a blind hole 30, which serves to define the fitting hole 1 5 in a defined manner. On the left side of the picture, the dowel pin 5 is flush as a second variant in the area of the impact point with the corresponding nozzle part. Instead of a blind hole 30, a through hole 30 'is drilled Depending on requirements, one or the other, or both can be used on the same nozzle. Another great advantage can be seen from the variations shown. The two basic bodies of the yarn treatment nozzles are made of a highly wear-resistant and very expensive material, in particular ceramic. The bores or seats for the clamping means can be produced in a standardized or automated manner with regard to the diameters and diameter ratios. The dowel pins, on the other hand, can be manufactured as inexpensive decollage parts in different lengths for the respective application

FIG. 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 two yarn treatment bodies 1 and 40 can be mounted in mirror image on a base carrier 7.

FIGS. 5a and 5b show a thermal treatment body 40 which has two flow chambers 41, 41a, especially 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 superheated steam, the disadvantage of today's extremely high yarn transport speeds, together with the preparation on the yarn, is that the conditions are extremely aggressive. What is particularly interesting about the example shown is that the two continuous chambers or steam chambers have a remarkably large longitudinal dimension KL, which is process-related 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 pass-through chambers 41 and 41a. With the new design of the connecting means, the two chambers can be particularly close to one another If many parallel yarn runs are required, this is particularly advantageous because the pitch T between two adjacent yarn runs can be selected to be extremely small. The dowel pin and screw connection are preferably arranged on a line 22 parallel to the yarn run. FIG. 5b shows a further yarn storage The flow nozzle is indicated by dash-dotted lines, with fi f2, f3 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 pass through the continuous steam chamber via the - 8th -

Leave the yarn outlet 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 must be collected from the flow chamber 41, 41 a 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 vapor collection 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 game finishing nozzle is that the compressed air is bundled into the yarn channel as a strong air jet to create 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 length of the chamber is denoted by KL and the length of the medium supply 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 directed radiation effect by the thermal medium during the thermal treatment, be it hot air, hot steam or any hot medium mixture, e.g. can also contain preparation agents.

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 correspondingly on the right. For the texturing process, reference is made to WO97 / 30200. Plain 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 channels 103, which are connected to a compressed air source Pf, highly compressed air is blown into the yarn channel 104 at an angle in the transport direction of the yarn. Immediately afterwards, the yarn channel 104 is opened conically in such a way that a supersonic flow, preferably with more than Mach 2, occurs 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. The texturing takes place depending on the level of available air pressure ( 9 1 2 to 14 bar and more) either within the conical part 102 or in the outlet area instead 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, the chemical preparation being shown on the left and migration on the right. The yarn 100 'comes directly from a spinning process and is guided over a preparation device 1 20, which has a base body 1 21, in which a feed channel 1 22 for the preparation agent is guided from below to the area of the thread path and with the so-called preparation lips 123 ends. Above the preparation humps, two guide webs 1 24 are arranged in a U-shape, which guide the yarn 100 ′ laterally over the preparation lips 1 23. The base body 1 21 preferably has a curved guide groove 1 25 in such a way that the thread run is gently guided over the point of contact of the yarn 100 'with the preparation agent. The preparation agent is applied to the yarn in the manner of an entraining effect. Because the preparation agent in the feed channel 1 22 is only under pressure insofar as safe refilling is ensured, it is not possible to wet all the filaments of the yarn evenly. The result is that the yarn cannot be provided with the preparation agent sufficiently homogeneously over the preparation hops. Depending on the type of preparation, the preparation film, which is partly applied on one side, dries quickly, so that the effectiveness remains reduced. The inventors have now recognized that this problem can be remedied by subjecting the yarn 100 ′ to a more intensive vortex flow at a distance FA shortly after the preparation. A double vortex flow has proven to be optimal, which produces a thorough mixing of the preparation agent in the entire yarn composite and at the same time a crossing of the filaments in the thread.As a rule, intermingling knots should be avoided.The migration nozzle only serves half of the work in terms of vortexing. The yarn is opened by the double vortex flow and the individual filaments are crossed against each other

Claims

claims

1. Yarn treatment device with a preferably detachable screw connection of divided treatment bodies made of highly wear-resistant, in particular ceramic material, so that the connection has at least one dowel pin, which is held in a first body part with mechanical clamping 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.

2. Yarn treatment device according to claim 1, so that the connection has two axially parallel dowel pins.

3. Yarn treatment device according to claim 1, so that the connection has at least one screw connection and at least one or two axially parallel dowel pins, the connecting means being arranged in a line parallel to the thread path in the treatment body.

4. Yarn treatment device according to one of claims 1 to 3, d ad u rc h g e ke n nz e i c h n et that in the two treatment bodies to be connected each have an essentially identical fitting bore and in a nozzle body a second, as an elongated hole fitting bore.

5. Yarn treatment device according to one of claims 1 or 4, dad urch ge ke n nze I net that the clamping means have a tension spring or an open tension ring or a compression zone, and the dowel pins are preferably miniaturized in diameter, or are needle-shaped, wherein a corresponding groove is provided on the dowel pins for each clamping ring in such a way that the clamping ring diameter can be reduced by an external force when mounting and removing the dowel pins.

6 yarn treatment device according to one of claims 1 to 5, d ad u rc hgekennzeichn et that in the treatment body, in which the dowel pin is held with the clamping means, an insertion cone is attached, which is transferred into a belt grinding for the clamping means or a clamping ring as a holding shoulder , for long positioning of the dowel pin.

7 yarn treatment device according to one of claims 1 to 6, d ad u rc h g e k e n nze i c h n et that the treatment body are formed in two parts, as nozzle plate and cover plate, the dowel pins with the clamping means preferably in the nozzle plate, particularly preferably can be rotatably fixed

8 yarn treatment device according to one of claims 1 to 7, d ad u rc h g e k n nze i c h n et that the cover plate has a blind hole or 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.

9 yarn treatment device according to one of claims 1 to 8, d ad u rc h g e k n nze i c h net that the connection consists of two dowel pins, both dowel pins preferably projecting on one side of the yarn treatment nozzle, for a second positioning function

10. Garnehandlungseinπchtung according to one of claims 1 to 9, d ad u rc h g e k n nze i c h n et that at least one treatment body part, preferably both treatment body parts made of ceramic material and the dowel pins made of high-strength steel or

Are ceramics

11 yarn treatment device according to claim 1, d ad u rc h g e ke n n z e i c h n e t that they for the heat treatment a treatment body with a continuous

Chamber with a yarn inlet and Garnaustπttsöffnung for the free

Yarn pass, as well as a large cross-sectional feed channel, especially for

Has steam, the large cross-section steam feed channel preferably as

Elongated hole extends over at least 20% of the length of the steam chamber - 12-

12. Yarn treatment device according to one of claims 1 to 11, d a d u rc h g e k e n n z e i c h n et that it is designed as a double nozzle, with two parallel yarn passes, the two nozzle halves being formed symmetrically in both treatment body halves.

13. Use of the yarn treatment device according to claim 1, before and / or after an air treatment nozzle for a thermal yarn treatment, wherein the thermal effect of a hot, gaseous medium, in particular hot steam, is used or as a yarn swirling nozzle.

14. Use of the yarn treatment device according to claim 1, before and / or after an air treatment nozzle for a texturing or intermingling, for a thermal yarn treatment, the thermal yarn treatment taking place in a treatment body with a continuous steam chamber.